RISK FACTORS

      Investing in our common stock involves a high degree of risk. You should carefully consider the risks and uncertainties described below together with all of the other information included in this prospectus, including the financial statements and related notes appearing at the end of this prospectus before deciding to invest in our common stock. If any of the following risks actually occur they would harm our business, prospects, financial condition and results of operations, possibly materially. In this event, the market price of our common stock could decline and you could lose part or all of your investment. Please read “Special Note Regarding Forward-Looking Statements.”

Risks Related to Our Financial Position and Potential Need for Additional Financing

We are a development stage life sciences company with a limited operating history and a history of net losses and negative cash flows from operations. We may never be profitable, and if we incur operating losses and generate negative cash flows from operations for longer than expected, we may be unable to continue operations.

      We are a development stage life sciences company and have a limited operating history, limited capital, limited sources of revenue and have incurred losses since inception. Our operations to date have been limited to organizing our company, developing and engaging in clinical trials of our lead product candidate, MyoCell, and our MyoCath product candidate, expanding our pipeline of complementary product candidates through internal development and third party licenses, expanding and strengthening our intellectual property position through internal programs and third party licenses and recruiting management, research and clinical personnel. Consequently, you may have difficulty in predicting our future success or viability due to our lack of operating history. As of March 31, 2007, we have accumulated a deficit during our development stage of approximately $66.8 million. Our lead product candidate has not received regulatory approval or generated any material revenues and is not expected to generate any material revenues until early 2009, if ever. Since inception, we have generated substantial net losses, including net losses of approximately $13.2 million, $7.3 million and $5.5 million in 2006, 2005 and 2004, respectively and substantial negative cash flows from operations. We anticipate that we will continue to incur significant and increasing net losses and negative cash flows from operations for the foreseeable future as we:

      Our limited experience in conducting and managing preclinical development activities, clinical trials and the application process necessary to obtain regulatory approvals might prevent us from successfully designing or implementing a preclinical study or clinical trial. If we do not succeed in conducting and managing our preclinical development activities or clinical trials, or in obtaining regulatory approvals, we might not be able to commercialize our product candidates, or might be significantly delayed in doing so, which will materially harm our business.

      None of the products that we are currently developing has been approved by the FDA or any similar regulatory authority in any foreign country. Our ability to generate revenues from any of our product candidates will depend on a number of factors, including our ability to successfully complete clinical trials,

obtain necessary regulatory approvals and implement our commercialization strategy. In addition, even if we are successful in obtaining necessary regulatory approvals and bringing one or more product candidates to market, we will be subject to the risk that the marketplace will not accept those products. We may, and anticipate that we will need to, transition from a company with a research and development focus to a company capable of supporting commercial activities and we may not succeed in such a transition.

      Because of the numerous risks and uncertainties associated with our product development and commercialization efforts, we are unable to predict the extent of our future losses or when or if we will become profitable. Our failure to successfully commercialize our product candidates or to become and remain profitable could depress the market price of our common stock and impair our ability to raise capital, expand our business, diversify our product offerings and continue our operations.

Our outstanding indebtedness to BlueCrest Capital Finance, L.P. imposes certain restrictions on how we conduct our business. In addition, all of our assets, except our intellectual property, are pledged to secure this indebtedness. If we fail to meet our obligations to BlueCrest Capital, our payment obligations may be accelerated and the collateral securing the debt may be sold to satisfy these obligations.

      Pursuant to a Loan and Security Agreement, dated May 31, 2007, BlueCrest Capital Finance, L.P., or BlueCrest Capital, agreed to provide us a three-year, $5.0 million term loan, or the BlueCrest Loan. For the first three months of the BlueCrest Loan, we are only required to make payments of interest. Commencing in the fourth month following the date of the BlueCrest Loan, we are required to make 33 equal monthly payments of principal and interest. Interest accrues at the rate of 8% plus the greater of (i) 4.5% or (ii) the yield on three-year U.S. Treasury Notes on the date of the BlueCrest Loan. In the event we seek to repay the BlueCrest Loan prior to maturity, we are subject to a prepayment penalty equal to 3% of the outstanding principal if paid during the first year of the BlueCrest Loan, 2% of the outstanding principal if paid during the second year of the BlueCrest Loan and 1% of the outstanding principal if paid during the third year of the BlueCrest Loan. As collateral to secure our repayment obligations to BlueCrest Capital, we have granted it a first priority security interest in all of our assets, excluding our intellectual property but including the proceeds from any sale of any of our intellectual property.

      The Loan and Security Agreement contains various provisions that restrict our operating flexibility. Pursuant to the agreement, we may not, among other things:

      These provisions could have important consequences for us, including (i) making it more difficult for us to obtain additional debt financing from another lender, or obtain new debt financing on terms favorable to us, because such new lender will have to be willing to be subordinate to BlueCrest Capital, (ii) causing us to use a portion of our available cash for debt repayment and service rather than other perceived needs and/or (iii) impacting our ability to take advantage of significant, perceived business opportunities. Our failure to timely repay our obligations under the BlueCrest Loan or meet the covenants set forth in the Loan and Security Agreement could give rise to a default under the agreement. In the event of an uncured default, the agreement provides that all amounts owed to BlueCrest Capital are immediately due and payable and that BlueCrest Capital has the right to enforce its security interest in the assets securing the BlueCrest Loan. In such event, BlueCrest Capital could take possession of any or all of our assets in which they hold a security interest, and dispose of those assets to the extent necessary to pay off our debts, which would materially harm our business.

We have a substantial amount of debt and may incur substantial additional debt, which could adversely affect our ability to pursue certain business objectives, obtain financing in the future and/or react to changes in our business.

      In addition to the BlueCrest Loan, on June 1, 2007, we borrowed $5.0 million from Bank of America, N.A., or the Bank of America Loan. Accordingly, as of the date of this prospectus, we have an aggregate of $10.0 million in principal amount of outstanding indebtedness. Shortly after this offering, we intend to use approximately $5.3 million of the proceeds of this offering to satisfy our obligations under the Bank of America Loan and related agreements. We anticipate that the BlueCrest Loan will need to be serviced and repaid with existing cash, cash generated by this offering or cash generated from other security or loan placements, if any. If we are unable to generate cash through additional financings, we may have to delay or curtail research, development and commercialization programs.

      In addition to the limitations imposed on our operational flexibility by the BlueCrest Loan as described above, the BlueCrest Loan and any other indebtedness incurred by us could have significant additional negative consequences, including, without limitation:

We may need substantial additional funding and may be unable to raise capital when needed. An inability to obtain additional financing on acceptable terms could adversely affect our business, financial condition, results of operations, and could even prevent us from continuing our business.

      Even if we secure approximately $                     million of proceeds in connection with this offering, our demand for capital may be significantly higher than anticipated. We may require substantial future capital in order to continue the research and development, preclinical and clinical programs, and regulatory activities necessary to obtain regulatory approval of our product candidates. In addition, subject to obtaining regulatory approval for any of our product candidates, we expect to incur significant commercialization expenses for product sales and marketing, manufacturing the product and/or securing commercial quantities of product from manufacturers and product distribution.

      The extent of our need for additional capital will depend on numerous factors, including, but not limited to:

      We have no commitments or arrangements from third parties for any additional financing to fund the research and development and commercialization of any of our product candidates. We may need to seek substantial additional financing through public and/or private financing, which may include equity and/or debt financings, and through other arrangements, including collaborative arrangements. However, financing may not be available when we need it, or may not be available on acceptable terms. Our ability to obtain additional debt financing may be limited by the amount of, terms and restrictions of our then current debt. For instance, we do not anticipate repaying the BlueCrest Loan until its scheduled maturity in June 2010. Accordingly, until such time, we will generally be restricted from, among other things, incurring additional indebtedness or liens, with limited exceptions. See “— We have a substantial amount of debt...” and “— Our outstanding indebtedness to BlueCrest Capital Finance, L.P. imposes certain restrictions...” Additional debt financing, if available, may involve restrictive covenants that limit or further limit our operating and financial flexibility and prohibit us from making distributions to shareholders. If we raise additional funds by issuing equity, equity-related or convertible securities, the economic, voting and other rights of our existing shareholders, including investors who purchase shares in this offering, may be diluted, and those securities may have rights superior to those of our common stock. If we obtain additional capital through collaborative arrangements, we may be required to relinquish greater rights to our technologies or product candidates than we might otherwise have or become subject to restrictive covenants that may affect our business. If we are unable to raise additional funds when we need them, we may be required to delay, scale back or eliminate expenditures for our development programs, curtail efforts to commercialize our product candidates or reduce

the scale of our operations, any of which could adversely affect our business, financial condition, results of operations, and could even prevent us from continuing our business at all.

Risks Related to Product Development

All of our product candidates are in an early stage of development and we may never succeed in developing and/or commercializing them. We depend heavily on the success of our lead product candidate, MyoCell. If we are unable to commercialize MyoCell or any of our other product candidates or experience significant delays in doing so, our business may fail.

      We have invested a significant portion of our efforts and financial resources in our lead product candidate, MyoCell, and depend heavily on its success. MyoCell is currently being tested in clinical trials. Even if MyoCell progresses through clinical trials as we anticipate, we do not expect MyoCell to be commercially available until, at the soonest, the first quarter of 2008. We need to devote significant additional research and development, financial resources and personnel to develop commercially viable products, obtain regulatory approvals and establish a sales and marketing infrastructure.

      We are likely to encounter hurdles and unexpected issues as we proceed in the development of MyoCell and our other product candidates. There are many reasons that we may not succeed in our efforts to develop our product candidates, including the possibility that:

Our approach of using cell-based therapy for the treatment of heart damage is risky and unproven and no products using this approach have received regulatory approval in the United States or Europe.

      No company has yet been successful in its efforts to obtain regulatory approval in the United States or Europe of a cell-based therapy product for the treatment of heart damage. Cell-based therapy products, in general, may be susceptible to various risks, including undesirable and unintended side effects, unintended immune system responses, inadequate therapeutic efficacy or other characteristics that may prevent or limit their approval by regulators or commercial use. Many companies in the industry have suffered significant setbacks in advanced clinical trials, despite promising results in earlier trials. One of our competitors exploring the use of skeletal myoblasts has announced its intent to cease to enroll new patients in its European Phase II clinical trial based on the determination of its monitoring committee that there was a low likelihood that the trial would result in the hypothesized improvement in heart function. Although our clinical research to date suggests that MyoCell may improve the contractile function of the heart, we have not yet been able to demonstrate a mechanism of action and additional research is needed to precisely identify such mechanism.

If our clinical trials are unsuccessful or significantly delayed, or if we do not complete our clinical trials, we will not receive regulatory approval for or be able to commercialize our product candidates.

      Our lead product candidate, MyoCell, is still in clinical testing and has not yet received approval from the FDA or any similar foreign regulatory authority for any indication. MyoCell may never receive regulatory approval or be commercialized in the United States or other countries.

      We cannot market any product candidate until regulatory agencies grant approval or licensure. In order to obtain regulatory approval for the sale of any product candidate, we must, among other requirements, provide the FDA and similar foreign regulatory authorities with preclinical and clinical data that demonstrate to the satisfaction of regulatory authorities that our product candidates are safe and effective for each indication under the applicable standards relating to such product candidate. The preclinical studies and clinical trials of

any product candidates must comply with the regulations of the FDA and other governmental authorities in the United States and similar agencies in other countries.

      Even if we achieve positive interim results in clinical trials, these results do not necessarily predict final results, and positive results in early trials may not be indicative of success in later trials. For example, MyoCell has been studied in a limited number of patients to date. Even though our early data has been promising, we have not yet completed any large-scale pivotal trials to establish the safety and efficacy of MyoCell. A number of participants in our clinical trials have experienced serious adverse events adjudicated or determined by trial investigators to be potentially attributable to MyoCell. See “Risk Factors — Our product candidates may never be commercialized due to unacceptable side effects and increased mortality that may be associated with such product candidates.” There is a risk that safety concerns relating to our product candidates or cell-based therapies in general will result in the suspension or termination of our clinical trials.

      We may experience numerous unforeseen events during, or as a result of, the clinical trial process that could delay or prevent regulatory approval and/or commercialization of our product candidates, including the following:

      In the SEISMIC Trial, we have continued to experience delays attributable to slower than anticipated enrollment of patients. We may continue to experience difficulties in enrolling patients in our clinical trials, which could increase the costs or affect the timing or outcome of these trials and could prevent us from completing these trials.

      Failures or perceived failures in our clinical trials would delay and may prevent our product development and regulatory approval process, make it difficult for us to establish collaborations, negatively affect our reputation and competitive position and otherwise have a material adverse effect on our business.

Our product candidates may never be commercialized due to unacceptable side effects and increased mortality that may be associated with such product candidates.

      Possible side effects of our product candidates may be serious and life-threatening. A number of participants in our clinical trials of MyoCell have experienced serious adverse events potentially attributable to MyoCell, including six patient deaths and 14 patients experiencing irregular heartbeats. A serious adverse event is generally an event that results in significant medical consequences, such as hospitalization, disability or death, and must be reported to the FDA. The occurrence of any unacceptable serious adverse events during or after preclinical and clinical testing of our product candidates could temporarily delay or negate the possibility of regulatory approval of our product candidates and adversely affect our business. Both our trials and independent trials have reported the occurrence of irregular heartbeats in treated patients, a significant risk to patient safety. We and our competitors have also, at times, suspended trials studying the effects of myoblasts, at least temporarily, to assess the risk of irregular heartbeats and it has been reported that one of our competitors studying the effect of myoblast implantation prematurely discontinued a study because of the high incidence of irregular heartbeats. While we believe irregular heartbeats may be manageable with the use of certain prophylactic measures including an implantable cardioverter defibrillator, or ICD, and anti-arrhythmic drug therapy, these risk management techniques may not prove to sufficiently reduce the risk of unacceptable side effects. Although our early results suggest that patients treated with MyoCell do not face materially different health risks than heart failure patients with similar levels of damage to the heart who have not been treated with MyoCell, we are still in the process of seeking to demonstrate that our product candidates do not pose unacceptable health risks. We have not yet treated a sufficient number of patients to allow us to make a determination that serious unintended consequences will not occur.

We depend on third parties to assist us in the conduct of our preclinical studies and clinical trials, and any failure of those parties to fulfill their obligations could result in costs and delays and prevent us from obtaining regulatory approval or successfully commercializing our product candidates on a timely basis, if at all.

      We engage consultants and contract research organizations to help design, and to assist us in conducting, our preclinical studies and clinical trials and to collect and analyze data from those studies and trials. The consultants and contract research organizations we engage interact with clinical investigators to enroll patients in our clinical trials. As a result, we depend on these consultants and contract research organizations to perform the studies and trials in accordance with the investigational plan and protocol for each product candidate and in compliance with regulations and standards, commonly referred to as “good clinical practice”, for conducting, recording and reporting results of clinical trials to assure that the data and results are credible and accurate and the trial participants are adequately protected, as required by the FDA and foreign regulatory agencies. We may face delays in our regulatory approval process if these parties do not perform their obligations in a timely or competent fashion or if we are forced to change service providers. The risk of delays is heightened for our clinical trials conducted outside of the United States, where it may be more difficult for us to ensure that studies are conducted in compliance with foreign regulatory requirements. Any third parties that we hire to conduct clinical trials may also provide services to our competitors, which could compromise the performance of their obligations to us. If these third parties do not successfully carry out their duties or meet expected deadlines, or if the quality, completeness or accuracy of the data they obtain is compromised due to their failure to adhere to our clinical trial protocols or for other reasons, our clinical trials may be extended, delayed or terminated or may otherwise prove to be unsuccessful. If there are delays or failures in clinical trials or regulatory approvals as a result of the failure to perform by third parties, our development costs will increase, and we may not be able to obtain regulatory approval for our product candidates. In addition, we may not be able to establish or maintain relationships with these third parties on favorable terms, if at all. If we need to enter into replacement arrangements because a third party is not performing in accordance with our expectations, we may not be able to do so without undue delays or considerable expenditures or at all.

Risks Related to Government Regulation and Regulatory Approvals

Our cell-based product candidates are based on novel technologies and the FDA and regulatory agencies in other countries have limited experience reviewing product candidates using these technologies.

      We are subject to the risks of failure inherent in the development of product candidates based on new technologies. The novel nature of our product candidates creates significant challenges in regards to product development and optimization, government regulation, third party reimbursement and market acceptance. These include:

      As a result, the development and commercialization pathway for our cell-based therapies may be subject to increased uncertainty, as compared to the pathway for new conventional drugs.

We are subject to numerous risks associated with seeking regulatory approval of MyoCell pursuant to a protocol that requires the use of a catheter system which is still subject to FDA approval. The catheter system we intend to use in connection with our MARVEL Trial is owned by an unaffiliated third party. Although we have entered into a two-year supply agreement for delivery of the catheter system for use in the MARVEL Trial, we are subject to a number of risks not addressed by the parties in the supply agreement.

      We anticipate that we will submit to the FDA an amendment to the protocol for our MARVEL Trial, originally submitted in November 2006, that will require participating trial investigators to use Biosense Webster’s, a Johnson & Johnson company, NOGA ^® Cardiac Navigation System along with the MyoStar ^TM injection catheter, or MyoStar, or collectively with the NOGA ^® Cardiac Navigation System, the MyoStar System, for the delivery of MyoCell to patients enrolled in the trial. We further anticipate that if MyoCell receives regulatory approval, such approval will require MyoCell to be injected with a catheter system that has also secured regulatory approval. Accordingly, the commercial deployment of MyoCell is dependent upon MyoStar, MyoCath or some other catheter system securing regulatory approval for use with MyoCell. Although MyoStar has received CE mark approval in Europe, neither MyoStar, MyoCath nor any other catheter system is commercially available in the United States and they may only be used pursuant to FDA approved investigational protocols. Notwithstanding the devotion of considerable resources to the development and testing of MyoStar and MyoCath, they may never receive additional or any, respectively, regulatory approval that will allow for their commercial use with MyoCell.

      We are not affiliated with Biosense Webster, the Cordis Corporation or any other Johnson & Johnson company. Although we have entered into a supply agreement with Biosense Webster pursuant to which it has agreed to deliver MyoStar to us for a two year period at an agreed upon price as and when required by the MARVEL Trial, we currently have no right to control the further development, clinical testing and/or refinement of MyoStar. Biosense Webster currently has the right to make the following types of decisions without consulting with or even considering our views, which decisions could directly or indirectly negatively impact our efforts and/or ability to secure regulatory approval of MyoCell:

If the FDA approves our amended protocol for the MARVEL Trial and a condition of the approved protocol is use of the MyoStar System, the unavailability of the MyoStar System, for any reason, would have a material adverse effect on our product development and commercialization efforts as we will be unable to recover the time and money expended on the MARVEL Trial prior to such determination of unavailability.

We must comply with extensive government regulations in order to obtain and maintain marketing approval for our products in the United States and abroad. If we do not obtain regulatory approval for our product candidates, we may be forced to cease our operations.

      Our product candidates are subject to extensive regulation in the United States and in every other country where they will be tested or used. These regulations are wide-ranging and govern, among other things:

      We cannot market our product candidates until we receive regulatory approval. The process of obtaining regulatory approval is lengthy, expensive and uncertain. Any difficulties that we encounter in obtaining regulatory approval may have a substantial adverse impact on our business and cause our stock price to decline significantly.

      In the United States, the FDA imposes substantial requirements on the introduction of biological products and many medical devices through lengthy and detailed laboratory and clinical testing procedures, sampling activities and other costly and time-consuming procedures. Satisfaction of these requirements typically takes several years and the time required to do so may vary substantially based upon the type and complexity of the biological product or medical device.

      In addition, product candidates that we believe should be classified as medical devices for purposes of the FDA regulatory pathway may be determined by the FDA to be biologic products subject to the satisfaction of significantly more stringent requirements for FDA approval.

      The requirements governing the conduct of clinical trials and cell culturing and marketing of our product candidates outside the United States vary widely from country to country. Foreign approvals may take longer to obtain than FDA approvals and can require, among other things, additional testing and different clinical trial designs. Foreign regulatory approval processes generally include all of the risks associated with the FDA approval processes. Some foreign regulatory agencies also must approve prices of the products. Regulatory

approval in one country does not ensure regulatory approval in another, but a failure or delay in obtaining regulatory approval in one country may negatively impact the regulatory process in others. We may not be able to file for regulatory approvals and may not receive necessary approvals to market our product candidates in any foreign country. If we fail to comply with these regulatory requirements or fail to obtain and maintain required approvals in any foreign country, we will not be able to sell our product candidates in that country and our ability to generate revenue will be adversely affected.

      We cannot assure you that we will obtain FDA or foreign regulatory approval to market any of our product candidates for any indication in a timely manner or at all. If we fail to obtain regulatory approval of any of our product candidates for at least one indication, we will not be permitted to market our product candidates and may be forced to cease our operations.

Even if some of our product candidates receive regulatory approval, these approvals may be subject to conditions, and we and our third party manufacturers will in any event be subject to significant ongoing regulatory obligations and oversight.

      Even if any of our product candidates receives regulatory approval, the manufacturing, marketing and sale of our product candidates will be subject to stringent and ongoing government regulation. Conditions of approval, such as limiting the category of patients who can use the product, may significantly impact our ability to commercialize the product and may make it difficult or impossible for us to market a product profitably. Changes we may desire to make to an approved product, such as cell culturing changes or revised labeling, may require further regulatory review and approval, which could prevent us from updating or otherwise changing an approved product. If our product candidates are approved by the FDA or other regulatory authorities for the treatment of any indications, regulatory labeling may specify that our product candidates be used in conjunction with other therapies. For instance, we currently anticipate that prior implantation of an ICD and treatment with optimal drug therapy will be required at least initially as a condition to treatment with MyoCell.

      Once obtained, regulatory approvals may be withdrawn for a number of reasons, including the later discovery of previously unknown problems with the product. Regulatory approval may also require costly post-marketing follow-up studies, and failure of our product candidates to demonstrate sufficient efficacy and safety in these studies may result in either withdrawal of marketing approval or severe limitations on permitted product usage. In addition, numerous additional regulatory requirements relating to, among other processes, the labeling, packaging, adverse event reporting, storage, advertising, promotion and record-keeping will also apply. Furthermore, regulatory agencies subject a marketed product, its manufacturer and the manufacturer’s facilities to continual review and periodic inspections. Compliance with these regulatory requirements are time consuming and require the expenditure of substantial resources.

      If any of our product candidates is approved, we will be required to report certain adverse events involving our products to the FDA, to provide updated safety and efficacy information and to comply with requirements concerning the advertisement and promotional labeling of our products. As a result, even if we obtain necessary regulatory approvals to market our product candidates for any indication, any adverse results, circumstances or events that are subsequently discovered, could require that we cease marketing the product for that indication or expend money, time and effort to ensure full compliance, which could have a material adverse effect on our business.

      In response to recent events regarding questions about the safety of certain approved prescription products, including the lack of adequate warnings, the FDA and the U.S. Congress are currently considering new regulatory and legislative approaches to advertising, monitoring and assessing the safety of marketed drugs, including legislation authorizing the FDA to mandate labeling changes for approved products, particularly those related to safety. It is possible that congressional and FDA initiatives pertaining to ensuring the safety of marketed biologics and similar initiatives in other countries, or other developments pertaining to the pharmaceutical industry, could require us to expend additional resources to comply with such initiatives and could adversely affect our operations.

      In addition, the FDA and similar foreign governmental authorities have the authority to require the recall of commercialized products in the event of any failure to comply with applicable laws and regulations or defects in design or manufacture. In the event any of our product candidates receives approval and is commercialized, a government-mandated or voluntary product recall by us could occur as a result of component failures, device malfunctions, or other negative events such as serious injuries or deaths, or quality-related issues such as cell culturing errors or design or labeling defects. Recalls of any of our potential products could divert managerial and financial resources, harm our reputation and adversely affect our financial condition, results of operations and stock price.

      Any failure by us, or by any third parties that may manufacture or market our products, to comply with the law, including statutes and regulations administered by the FDA or other U.S. or foreign regulatory authorities, could result in, among other things, warning letters, fines and other civil penalties, suspension of regulatory approvals and the resulting requirement that we suspend sales of our products, refusal to approve pending applications or supplements to approved applications, export or import restrictions, interruption of production, operating restrictions, closure of the facilities used by us or third parties to manufacture our product candidates, injunctions or criminal prosecution. Any of the foregoing actions could have a material adverse effect on our business.

We must comply with federal, state and foreign laws, regulations and other rules relating to the healthcare business, and, if we do not fully comply with such laws, regulations and other rules, we could face substantial penalties.

      We are, or will be directly or indirectly through our customers, subject to extensive regulation by the federal government, the states and foreign countries in which we may conduct our business. The laws that directly or indirectly affect our ability to operate our business include the following:

      If our operations are found to be in violation of any of the laws, regulations, rules or policies described above or any other law or governmental regulation to which we or our customers are or will be subject, or if the interpretation of the foregoing changes, we may be subject to civil and criminal penalties, damages, fines, exclusion from the Medicare and Medicaid programs and the curtailment or restructuring of our operations. Similarly, if our customers are found non-compliant with applicable laws, they may be subject to sanctions, which could also have a negative impact on us. Any penalties, damages, fines, curtailment or restructuring of our operations would adversely affect our ability to operate our business and our financial results. The risk of our being found in violation of these laws is increased by the fact that many of them have not been fully interpreted by the regulatory authorities or the courts, and their provisions are open to a variety of interpretations, and additional legal or regulatory change. Any action against us for violation of these laws, even if we successfully defend against it, could cause us to incur significant legal expenses, divert our management’s attention from the operation of our business and damage our reputation.

Our business involves the use of hazardous materials that could expose us to environmental and other liability.

      Our facility in Sunrise, Florida is subject to various local, state and federal laws and regulations relating to the use and disposal of hazardous or potentially hazardous substances, including chemicals and micro-organisms used in connection with our research and development activities. In the United States, these laws include the Occupational Safety and Health Act, the Toxic Test Substances Control Act and the Resource Conservation and Recovery Act. Although we believe that our safety procedures for handling and disposing of these materials comply with the standards prescribed by these regulations, we cannot assure you that accidental contamination or injury to employees and third parties from these materials will not occur. Although we have insurance coverage of up to $250,000 to cover claims arising from our use and disposal of these hazardous substances, the insurance that we currently hold may not be adequate to cover all liabilities relating to our use and disposal of hazardous substances.

Risks Related to Commercialization of our Product Candidates

If we are successful in securing regulatory approval of MyoCell utilizing a protocol that requires the use of MyoStar, we will be subject to numerous risks associated with commercializing a therapy that requires the use of a product that we do not control.

      Except for the agreement pursuant to which Biosense Webster has agreed to deliver MyoStar to us in connection with the MARVEL Trial, we have no agreement in place with Biosense Webster that defines our relationship with them and our prospective customers. Accordingly, Biosense Webster currently has the right to make the following types of decisions without consulting with or even considering our views, which decisions could directly or indirectly negatively impact our efforts and/or ability to commercialize MyoCell:

      Similarly, we have no control over the intellectual property rights underlying MyoStar or the MyoStar System, no ability to protect or defend any such intellectual property rights and no ability to prevent Biosense Webster from licensing or selling these intellectual property rights to one of our competitors.

The healthcare community has relatively little experience with therapies based on cellular medicine and, accordingly, if our product candidates do not become widely accepted by physicians, patients, third party payors or the healthcare community, we may be unable to generate significant revenue, if any.

      We are developing cell-based therapy product candidates for the treatment of heart damage that represent novel and unproven treatments and, if approved, will compete with a number of more conventional products and therapies manufactured and marketed by others, including major pharmaceutical companies. We cannot predict or guarantee that physicians, patients, healthcare insurers, third party payors or health maintenance organizations, or the healthcare community in general, will accept or utilize any of our product candidates. We anticipate that, if approved, we will market MyoCell primarily to interventional cardiologists, who are generally not the primary care physicians for patients who may be eligible for treatment with MyoCell. Accordingly, our commercial success may be dependent on third party physicians referring their patients to interventional cardiologists for MyoCell treatment.

      If we are successful in obtaining regulatory approval for any of our product candidates, the degree of market acceptance of those products will depend on many factors, including:

      Failure to achieve market acceptance would limit our ability to generate revenue and would have a material adverse effect on our business. In addition, if any of our product candidates achieve market acceptance, we may not be able to maintain that market acceptance over time if competing products or technologies are introduced that are received more favorably or are more cost-effective.

There is substantial uncertainty as to the coverage that may be available and the reimbursement rates that may be established for our product candidates. Any failure to obtain third party coverage or an adequate level of reimbursement for our product candidates will likely have a material adverse effect on our business.

      If we successfully develop, and obtain necessary regulatory approvals for, our product candidates we intend to sell them initially in Europe and the United States. We have not yet submitted any of our product candidates to the Center for Medicare and Medicaid Services, or CMS, or any private or governmental third party payor in the United States to determine whether or not our product candidates will be covered under private or public health insurance plans or, if they are covered, what coverage or reimbursement rates may be available. Although we believe hospitals may be entitled to some procedure reimbursement for MyoCell, we cannot assure you that such reimbursement will be adequate or available at all.

      In Europe, the pricing of prescription pharmaceutical products and services and the level of government reimbursement generally are subject to governmental control. Reimbursement and healthcare payment systems in European markets vary significantly by country, and may include both government-sponsored healthcare and private insurance. In these countries, pricing negotiations with governmental authorities can take six to twelve months or longer after the receipt of marketing approval for a product. To obtain reimbursement or pricing approval in some countries, we may be required to conduct one or more clinical trials that compare the cost effectiveness of our product candidates to other available therapies. Conducting one or more clinical trials for this purpose would be expensive and result in delays in commercialization of our product candidates. We may not obtain coverage or reimbursement or pricing approvals from countries in Europe in a timely manner, or at all. Any failure to receive coverage or reimbursement or pricing approvals from one or more European countries could effectively prevent us from selling our product candidates in those countries, which could materially adversely affect our business.

      In the United States, our revenues will depend upon the coverage and reimbursement rates and policies established for our product candidates by third party payors, including governmental authorities, managed-care providers, public health insurers, private health insurers and other organizations. These third party payors are increasingly attempting to contain healthcare costs by limiting both coverage and the level of reimbursement for new healthcare products approved for marketing by the FDA or regulatory agencies in other countries. As a result, significant uncertainty exists as to whether newly approved medical products will be eligible for coverage by third party payors or, if eligible for coverage, what the reimbursement rates will be for those products. Furthermore, cell-based therapies like MyoCell may be more expensive than pharmaceuticals, due to, among other things, the higher cost and complexity associated with the research, development and production of these therapies. This, in turn, may make it more difficult for us to obtain adequate reimbursement from third party payors, particularly if we cannot demonstrate a favorable cost-benefit relationship. Third party payors may also deny coverage or offer inadequate levels of reimbursement for our potential products if they determine that the product has not received appropriate clearances from the FDA or other government regulators or is experimental, unnecessary or inappropriate. Accordingly, we cannot assure you that adequate third party coverage or reimbursement will be available for any of our product candidates to allow us to successfully commercialize these product candidates.

      Coverage and reimbursement rates for our product candidates may be subject to increased restrictions both in the United States and in other countries in the future. Coverage policies and reimbursement rates are subject to change and we cannot guarantee that current coverage policies and reimbursement rates will be applicable to our product candidates in the future. U.S. federal, state and foreign agencies and legislatures from time to time may seek to impose restrictions on coverage, pricing, and reimbursement level of drugs, devices and healthcare services in order to contain healthcare costs.

We have only limited experience culturing our cell-based product candidates, and we may not be able to culture our product candidates in quantities sufficient for clinical studies or for commercial sale. We also face certain risks in connection with our use of third party manufacturers and cell culturing service providers.

      We may encounter difficulties in the production of our cell-based product candidates, including MyoCell, due to our limited experience internally culturing our product candidates. We have a cell culturing facility in Sunrise, Florida, which we believe has the capacity to meet substantially all of our projected demand for MyoCell in the United States for the balance of 2007. We began culturing cells at this facility for preclinical uses in the third quarter of 2006. Prior to such date, we outsourced our various cell culturing needs. We anticipate that we will begin culturing cells at this facility for clinical uses upon commencement of the MARVEL Trial. We have no experience in culturing our product candidates for the number of patients that will be required for later stage clinical studies or commercialization and may be unable to culture sufficient quantities of our product candidates for our clinical trials or our commercial needs on a timely and cost-effective basis. Difficulties arising from our limited cell culturing experience could reduce sales of our products, increase our costs or cause production delays, any of which could adversely affect our results of operations.

      We intend to further optimize our processing times by building our facilities or contracting with a small number of cell culturing facilities in strategic regional locations. We anticipate that a portion of the funds necessary to construct new manufacturing facilities may be made available to us by the governments of the countries where we seek to build such facilities. To the extent these funds are not available to us, we may be unable to construct these facilities or may need to seek additional capital.

      We anticipate that we will continue to use third party cell culturing service providers, including Pharmacell and Cambrex Bioscience, to supply a portion of our cell-based product candidates, including MyoCell, for clinical trials and commercial sales outside of the United States. We may not be able to, and in our Phase I/ II clinical trial experienced delays because we were not at times able to, obtain sufficient quantities of MyoCell from third party cell culturing service providers. In addition, our third party cell culturing providers may be unable to culture commercial quantities of our product candidates on a timely and cost-effective basis. The term of our supply agreement with Pharmacell expires six months following the end of completion of the SEISMIC and MARVEL Trials unless terminated earlier. We cannot be certain that we will be able to maintain our

relationships with our third party cell culturing service providers, including Pharmacell, or establish relationships with other cell culturing service providers on commercially acceptable terms.

      We currently use and expect to continue to use third party manufacturers to supply our device product candidates, including MyoCath. Our contract with our only MyoCath manufacturer is scheduled to terminate in September 2007. We anticipate either renegotiating our contract with this manufacturer or negotiating a new agreement with another manufacturer. The transition to a replacement contract manufacturer has additional risks, including those risks associated with the development by the replacement contract manufacturer of sufficient levels of expertise in the manufacturing process. If we are unable to renegotiate this agreement or enter into a replacement agreement with another contract manufacturer on reasonable terms and in a timely manner, or if any replacement contract manufacturer is unable to develop sufficient manufacturing expertise in a timely manner, we could experience shortages of clinical trial materials, which could adversely affect our business.

      Our cell culturing facility and those of our contract manufacturers and other cell culturing service providers will be subject to ongoing, periodic inspection by the FDA to confirm that the facilities comply with the FDA’s current Good Manufacturing Practices, or cGMP, if the facility manufactures biologics, and quality system regulations if the facility manufactures devices. Foreign regulatory agencies, for example, the International Standards Organization and the European authorities related to obtaining a “CE mark” on a device in Europe, may also impose similar requirements on us and conduct similar inspections of the facilities that manufacture our product candidates. Failure to follow and document adherence to such cGMP regulations or other regulatory requirements by us or our contract manufacturers or third party cell culturing service providers may lead to significant delays in the availability of our product candidates for commercial use or clinical study, may result in the delay or termination of a clinical trial, or may delay or prevent filing of applications for or our receipt of regulatory approval of our product candidates. If we or such third parties fail to comply with applicable regulations, the FDA or other regulatory authorities could impose sanctions on us, including fines, injunctions, civil penalties, denial of marketing approval of our product candidates, delays, suspension or withdrawal of approvals, license revocation, seizures or recalls of our product candidates, operating restrictions and criminal prosecutions. Any of these events could adversely affect our financial condition, profitability and ability to develop and commercialize products on a timely and competitive basis.

If we are unable to establish sales and marketing capabilities or enter into agreements with third parties to market and sell our product candidates, we may be unable to generate product revenues.

      We do not have a sales and marketing force and related infrastructure and have limited experience in the sales, marketing and distribution of our product candidates. To achieve commercial success for any approved product, we must either develop a sales and marketing force or outsource these functions to third parties. Currently, we intend to internally develop a direct sales and marketing force in both Europe and the United States as we approach commercial approval of our product candidates. The development of our own sales and marketing force will result in us incurring significant costs before the time that we may generate revenues. We may not be able to attract, hire, train and retain qualified sales and marketing personnel to build a significant or effective marketing and sales force for sales of our product candidates.

Product liability and other claims against us may reduce demand for our products or result in substantial damages. We anticipate that we will need to obtain and maintain additional or increased insurance coverage, and we may not be able to obtain or maintain such coverage on commercially reasonable terms, if at all.

      A product liability claim, a clinical trial liability claim or other claim with respect to uninsured liabilities or for amounts in excess of insured liabilities could have a material adverse effect on our business. Our business exposes us to potential liability risks that may arise from the clinical testing of our product candidates in human clinical trials and the manufacture and sale of any approved products. Any clinical trial liability or product liability claim or series of claims or class actions brought against us, with or without merit, could result in:

      Although we have clinical trial liability insurance, our current clinical trial liability insurance is subject to deductibles and coverage limitations. This insurance currently covers claims of up to $5 million each and up to $10 million in the aggregate each year. Our current clinical trial liability insurance may not continue to be available to us on acceptable terms, if at all, and, if available, the coverage may not be adequate to protect us against future clinical trial liability claims. We are currently seeking to increase our clinical trial liability insurance coverage.

      We do not currently have product liability insurance because none of our product candidates has yet been approved for commercialization. While we plan to seek product liability insurance coverage if any of our product candidates are sold commercially, we cannot assure you that we will be able to obtain product liability insurance on commercially acceptable terms, if at all, or that we will be able to maintain such insurance at a reasonable cost or in sufficient amounts to protect against potential losses.

      Claims may be made by consumers, healthcare providers, third party strategic collaborators or others selling our products if one of our products or product candidates causes, or appears to have caused, an injury. We may be subject to claims against us even if an alleged injury is due to the actions of others. For example, we rely on the expertise of physicians, nurses and other associated medical personnel to perform the medical procedures and processes related to our product candidates. If these medical personnel are not properly trained or are negligent in using our product candidates, the therapeutic effect of our product candidates may be diminished or the patient may suffer injury, which may subject us to liability. In addition, an injury resulting from the activities of our suppliers may serve as a basis for a claim against us.

      We do not intend to promote, or to in any way support or encourage the promotion of, our product candidates for off-label or otherwise unapproved uses. However, if our product candidates are approved by the FDA or similar foreign regulatory authorities, we cannot prevent a physician from using them for any off-label applications. If injury to a patient results from such an inappropriate use, we may become involved in a product liability suit, which will likely be expensive to defend.

      These liabilities could prevent or interfere with our clinical efforts, product development efforts and any subsequent product commercialization efforts, all of which could have a material adverse effect on our business.

Our success will depend in part on establishing and maintaining effective strategic partnerships, collaborations and licensing agreements.

      Our strategy for the development, testing, culturing and commercialization of our product candidates relies on establishing and maintaining numerous collaborations with various corporate partners, consultants, scientists, researchers, licensors, licensees and others, including the collaborations described in this prospectus. While we are continually in discussions with a number of companies, universities, research institutions, consultants, scientists, researchers, licensors, licensees and others to establish additional relationships and collaborations, which are typically complex and time consuming to negotiate, document and implement, we may not reach definitive agreements with any of them. Even if we enter into these arrangements, we may not be able to maintain these relationships or establish new ones in the future on acceptable terms.

      Furthermore, any collaboration that we enter into may not be successful. The success of our collaboration arrangements, if any, will depend heavily on the efforts and activities of our collaborators. Possible future collaborations have risks, including the following:

      These arrangements also may require us to grant certain rights to third parties, including exclusive marketing rights to one or more products, or may have other terms that are burdensome to us, and may involve the issuance of our securities. If any of our partners terminates its relationship with us or fails to perform its obligations in a timely manner, the development or commercialization of our technology and product candidates may be substantially delayed. Further, disputes may arise with our collaborators about inventorship and corresponding rights in know-how and inventions resulting from the joint creation or use of intellectual property by us and our collaborators.

We have provided a non-affiliated Korean entity certain technology to manufacture MyoCell and MyoCath and face the risk that such action and/or the actions of the Korean entity may materially damage our business, expose us to liability and/or result in the termination of various intellectual property licenses that are important to us.

      On February 1, 2005, we entered into a joint venture agreement with Bioheart Korea, Inc., pursuant to which we and Bioheart Korea agreed to create a joint venture company called Bioheart Manufacturing which intends to provide cell culturing services in Korea. We do not have operating control over Bioheart Manufacturing. In addition, our minority interest in Bioheart Manufacturing and our agreements to provide Bioheart Korea certain technologies are governed, in part, by South Korean laws and do not define in a comprehensive manner our various contractual and legal rights. As a result, at times our various rights have been subject to varying interpretations, and we may encounter comparable challenges in the future. We have also had limited operational experience with Bioheart Manufacturing and Bioheart Korea and are still in the process of defining our relationship with them and how we will work together.

      Our agreements to provide Bioheart Manufacturing with the technology to manufacture MyoCell and MyoCath are subject to varying interpretations that may increase our risk of disputes with Bioheart Manufacturing, Bioheart Korea and certain parties that licensed to us certain technology related to MyoCell and/or MyoCath. We also face the risk that Bioheart Manufacturing may not utilize or may not be perceived as utilizing our intellectual property rights in accordance with the terms of our agreements with them and/or our agreements with various third parties that have licensed technology to us. For instance, a complaint filed against us by Peter K. Law, Ph.D. and Cell Transplants Asia appears to question our rights to provide certain intellectual property to Bioheart Manufacturing and/or Bioheart Manufacturing’s right to use certain intellectual property. See “Legal Proceedings” below for a description of the complaint and the reasons we believe the complaint should be dismissed. If Bioheart Manufacturing were to misuse our intellectual property rights,

such misuse could, among other things, materially damage our business, expose us to potential liability and/or result in the termination of various intellectual property licenses that are important to us.

Risks Related to Our Intellectual Property

We have licensed and therefore do not own the intellectual property that is critical to our business. Any events or circumstances that result in the termination or limitation of our rights under any of the agreements between us and the licensors of our intellectual property could have a material adverse effect on our business.

      The intellectual property that is critical to our business has been licensed to us by various third parties. The operative terms of some of our material license agreements are vague or subject to interpretations which may increase the risks of dispute with our licensors.

      Under certain of our patent license agreements, we are subject to development, payment, commercialization and other obligations and, if we fail to comply with any of these requirements or otherwise breach those agreements, our licensors may have the right to terminate the license in whole or in part, terminate the exclusive nature of the license to the extent such license is exclusive or otherwise limit our rights thereunder, which could have a material adverse effect on our business. For instance, we are obligated to:

      On March 9, 2007, Peter K. Law, Ph.D. and Cell Transplants Asia, Limited, an entity wholly owned by Dr. Law, filed a complaint against us and Howard J. Leonhardt, individually, in the United States District Court for the Western District of Tennessee alleging, among other things, certain breaches of our licensing agreement with them. Dr. Law and Cell Transplants International are the licensors of the primary patent protecting MyoCell. Please see “Legal Proceedings” below for a description of the allegations made in the complaint. While the complaint does not appear to challenge our rights to license this patent and we believe this lawsuit is without merit, this litigation, if not resolved to the satisfaction of both parties, may adversely impact our relationship with Dr. Law and could, if resolved unfavorably to us, adversely affect our MyoCell commercialization efforts and have a significant impact on our results of operations and financial condition.

      Any termination or limitation of, or loss of exclusivity under, our exclusive or conditionally exclusive license agreements would have a material adverse effect on us and could delay or completely terminate our product development efforts.

We generally do not have the right under our material license agreements to control the protection of the patents licensed thereunder and, as a result, our licensors may take actions and make decisions that could materially adversely affect our business.

      Under our material license agreements, including, but not limited to, our license agreement for the primary patent for MyoCell, our licensors generally have the right to control the filing, prosecution, maintenance and defense of all licensed patents and patent applications and, if a third party infringes on any of those licensed patents, to control any legal or other proceedings instituted against that third party for infringement. As a result, our licensors may take actions or make decisions relating to these matters with which we do not agree or which could have a material adverse effect on our business. Likewise, our licensors may in the future grant licenses outside the field of heart damage treatment to third parties to use the patents and other intellectual property to which we have rights under our exclusive or conditionally exclusive license agreements. Should our licensors elect not to pursue the filing, prosecution or maintenance of a licensed patent application or patent or institute legal or other proceedings against a third party for infringements of those

patents, then we may be required to undertake these proceedings alone or jointly with others, who may have interests that are different from ours. Under certain of our license agreements, we have no right to undertake these proceedings even if our licensors refuse to do so. As a result, we may have no control or only limited control over the prosecution, maintenance, defense and enforcement of patent applications and patents that are critical to our business. In that regard, certain of our license agreements require that we contribute to the costs of filing, prosecuting, maintaining, defending and enforcing the licensed patent applications, patents and other intellectual property, whether or not we agree with those actions. Further, such actions typically require the expenditure of considerable time and money. See “Business — Technology In-Licenses and Other Agreements” for further information regarding our rights to control the protection of our patents under our material license agreements.

We do not have patent protection for MyoCell outside of the United States and we may not be able to effectively enforce our intellectual property rights in certain countries, which could have a material adverse effect on our business.

      We are seeking or intend to seek regulatory approval to market our product candidates in a number of foreign countries, including various countries in Europe. MyoCell, however, is not protected by patents outside of the United States, which means that competitors will be free to sell products that incorporate the same technologies that are used in MyoCell in those countries, including in European countries, which we believe may be one of the largest potential markets for these product candidates. In addition, the laws and practices in some of those countries, or others in which we may seek to market our other product candidates in the future, may not protect intellectual property rights to the same extent as in the United States. We or our licensors may not be able to effectively obtain, maintain or enforce rights with respect to the intellectual property relating to our product candidates in those countries. Our lack of patent protection in one or more countries, or the inability to obtain, maintain or enforce intellectual property rights in one or more countries, could adversely affect our ability to commercialize our products in those countries and otherwise have a material adverse effect on our business.

Our success depends on the protection of our intellectual property rights, particularly the patents that have been licensed to us, and our failure to secure and maintain these rights would materially harm our business.

      Our commercial success depends to a significant degree on our ability to:

      The degree of intellectual property protection for our technology is uncertain, and only limited intellectual property protection may be available for our product candidates, which may prevent us from gaining or keeping any competitive advantage against our competitors. Although we believe the patents that have been licensed or sublicensed to us, and the patent applications that we own or that have been licensed to us, generally provide us a competitive advantage, the patent positions of biotechnology, biopharmaceutical and medical device companies are generally highly uncertain, involve complex legal and factual questions and have been the subject of much litigation. Neither the U.S. Patent and Trademark Office nor the courts have a consistent policy regarding the breadth of claims allowed or the degree of protection afforded under many biotechnology patents. Even if issued, patents may be challenged, narrowed, invalidated or circumvented, which could limit our ability to stop competitors from marketing similar products or limit the length of term of patent protection we may have for our products. Further, a court or other government agency could interpret our patents in a way such that the patents do not adequately cover our current or future product candidates.

Changes in either patent laws or in interpretations of patent laws in the United States and other countries may diminish the value of our intellectual property or narrow the scope of our patent protection.

      In particular, we cannot assure you that:

      Accordingly, we may fail to secure meaningful patent protection relating to any of our existing or future product candidates or discoveries despite the expenditure of considerable resources. Further, there may be widespread patent infringement in countries in which we may seek patent protection, including countries in Europe, which may instigate expensive and time consuming litigation which could adversely affect the scope of our patent protection. In addition, others may attempt to commercialize products similar to our product candidates in countries where we do not have adequate patent protection. Failure to obtain adequate patent protection for our product candidates, or the failure by particular countries to enforce patent laws or allow prosecution for alleged patent infringement, may impair our ability to be competitive. The availability of infringing products in markets where we have patent protection, or the availability of competing products in markets where we do not have adequate patent protection, could erode the market for our product candidates, negatively impact the prices we can charge for our product candidates, and harm our reputation if infringing or competing products are manufactured to inferior standards.

The patent we believe is the primary basis for the protection of MyoCell is scheduled to expire in the United States in July 2009 and if we are unable to secure a patent term extension, we will have to seek to protect MyoCell through a combination of patents on other aspects of our technology and trade secrets, which may not prove to be effective.

      We anticipate that we will seek to collaborate with the owners of the patent, Dr. Peter Law and Cell Transplants International, to extend the term of this patent. In the event MyoCell is approved by the FDA prior to the patent expiration date and certain other material conditions are satisfied, we believe that this patent will be eligible for a five-year extension of its term until July 2014. It is likely, however, that the FDA will not complete review of and grant approval for MyoCell before this patent expires. In such event, a regular patent term extension will not be available, but Dr. Law and Cell Transplants International could request a one-year interim extension of the patent term during the period beginning six months before and ending fifteen days before the patent expiration. The request for interim extension must satisfy a number of material conditions including those conditions necessary to receive a regular patent term extension. Under certain circumstances the patent owner can request up to four additional one-year interim extensions. However, we cannot assure you that Dr. Law and Cell Transplants International will seek to obtain, or will be successful in obtaining, any regular or interim patent term extension.

      Once this patent expires, competitors will not be prevented from developing or marketing their own similar or identical compositions for the treatment of muscle degeneration, assuming they receive the requisite regulatory approval.

Our most important license agreement with respect to MyoCath is co-exclusive and the co-licensor of the intellectual property, a division of Abbott Laboratories, may also seek to commercialize MyoCath.

      In June 2003, we assigned our exclusive license to the primary patent protecting MyoCath to Advanced Cardiovascular Systems, Inc., or ACS, originally a subsidiary of Guidant Corporation and now d/b/a Abbott Vascular, a division of Abbott Laboratories. In connection with this agreement, ACS granted to us a co-exclusive, irrevocable, fully paid-up license to this patent for the life of the patent. Because our license is co-exclusive with ACS, ACS may, parallel to our efforts, seek to commercialize MyoCath if MyoCath secures regulatory approval. Accordingly, even if ACS does nothing to assist us to secure regulatory approval of MyoCath, ACS may become a direct competitor in the MyoCath manufacturing and supply business. In addition, pursuant to our agreement with ACS, we are prohibited from contracting with third parties for the distribution of MyoCath.

Our proposed pathway for securing regulatory approval of Bioheart Acute Cell Therapy is dependent on Tissue Genesis’ timely and successful completion of a Device Master File for the TGI 1200.

      We have developed a proposed pathway for seeking regulatory approval of Bioheart Acute Cell Therapy, which pathway depends on Tissue Genesis timely completing its Device Master File for the TGI 1200. A Device Master File is a voluntary submission to the FDA to provide confidential detailed information on a specific manufacturing facility, process, methodology, or component used in the manufacture, processing, or packaging of a medical device. Based upon our discussions with Tissue Genesis, we anticipate that the detailed information to be contained in the Device Master File to be filed by Tissue Genesis will be used in support of our IND application for Bioheart Acute Cell Therapy which, assuming favorable preclinical test results, we hope to file in the fourth quarter of 2007. We have no control over the content of the Device Master File and limited influence on the timing of its submission to the FDA. Our dependence upon Tissue Genesis to timely complete the Device Master File places us in a position where we cannot reliably predict our ability to meet our projected development timeline for Bioheart Acute Cell Therapy.

We have limited recourse available in the event that patents necessary for the use by our customers of the TGI 1200 product candidate, certain disposable products used in conjunction with this product candidate or processes or cells derived from this product candidate directly or indirectly infringe any patent rights of a third party.

      Our customers’ use of the TGI 1200 product candidate, certain disposable products used in conjunction with this product candidate and processes or cells derived from this product candidate may be determined to directly or indirectly infringe on patent rights held by third parties, including Thomas Jefferson University, or Third Party Patent Rights.

      The recourse available to us in the event that these patents are determined to directly or indirectly infringe any of the Third Party Patent Rights is limited by the terms of our exclusive license and distribution agreement with Tissue Genesis. Pursuant to this agreement, Tissue Genesis has agreed that we and our customers will not be liable for damages for directly or indirectly infringing any Third Party Patent Rights for the treatment of acute heart attacks. Tissue Genesis has, subject to certain conditions, also agreed to indemnify and hold harmless us and our customers from all claims that the products infringe any patents, copyrights or trade secret rights of a third party. However, if our use of the products is enjoined or if Tissue Genesis wishes to minimize its liability, Tissue Genesis may, at its option and expense, either:

      If none of the foregoing is feasible, Tissue Genesis is required to accept a return of the infringing product and refund to us the amount paid for such product. Any termination of our right to use, lease or sell the TGI 1200, certain disposable products used in conjunction with this product candidate and/or the processes or cells derived from this product candidate or any inability by Tissue Genesis to refund to us the amounts we paid for such products could have a material adverse effect on us.

Patent applications owned by or licensed to us may not result in issued patents, and our competitors may commercialize the discoveries we attempt to patent.

      The patent applications that we own and that have been licensed to us, and any future patent applications that we may own or that may be licensed to us, may not result in the issuance of any patents. The standards that the U.S. Patent and Trademark Office and foreign patent offices use to grant patents are not always applied predictably or uniformly and can change. Consequently, we cannot be certain as to the type and scope of patent claims to which we may in the future be entitled under our license agreements or that may be issued to us in the future. These applications may not be sufficient to meet the statutory requirements for patentability and therefore may not result in enforceable patents covering the product candidates we want to commercialize. Further, patent applications in the United States that are not filed in other countries generally are not published until at least 18 months after they are first filed and patent applications in certain foreign countries generally are not published until many months after they are filed. Scientific and patent publication often occurs long after the date of the scientific developments disclosed in those publications. As a result, we cannot be certain that we or any of our licensors was or will be the first creator of inventions covered by our (or their) patents or applications or the first to file such patent applications. As a result, our issued patents and patent applications could become subject to challenge by third parties that created such inventions or filed patent applications before us or our licensors, resulting in, among other things, interference proceedings in the U.S. Patent and Trademark Office to determine priority of discovery or invention. Interference proceedings, if resolved adversely to us or our licensors, could result in the loss of or significant limitations on patent protection for our products or technologies. Even in the absence of interference proceedings, patent applications now pending or in the future filed by third parties may prevail over the patent applications that have been or may be owned by or licensed to us or that we or our licensors may file in the future or may result in patents that issue alongside patents issued to us or our licensors or that may be issued or licensed to us in the future, leading to uncertainty over the scope of the patents owned by or licensed to us or that may in the future be owned by us or our freedom to practice the claimed inventions.

Our patents may not be valid or enforceable, and may be challenged by third parties.

      We cannot assure you that the patents that have been issued or licensed to us would be held valid by a court or administrative body or that we would be able to successfully enforce our patents against infringers, including our competitors. The issuance of a patent is not conclusive as to its validity or enforceability, and the validity and enforceability of a patent is susceptible to challenge on numerous legal grounds. Challenges raised in patent infringement litigation brought by or against us may result in determinations that patents that have been issued or licensed to us or any patents that may be issued to us or our licensors in the future are invalid, unenforceable or otherwise subject to limitations. In the event of any such determinations, third parties may be able to use the discoveries or technologies claimed in these patents without paying licensing fees or royalties to us, which could significantly diminish the value of our intellectual property and our competitive advantage. Even if our patents are held to be enforceable, others may be able to design around our patents or develop products similar to our products that are not within the scope of any of our patents.

      In addition, enforcing the patents that have been licensed to us and any patents that may be issued to us in the future against third parties may require significant expenditures regardless of the outcome of such efforts. Our inability to enforce our patents against infringers and competitors may impair our ability to be competitive and could have a material adverse effect on our business.

Issued patents and patent licenses may not provide us with any competitive advantage or provide meaningful protection against competitors.

      We own, hold licenses or hold sublicenses to an intellectual property portfolio consisting of approximately 19 patents and 19 patent applications in the United States, and approximately twelve patents and 51 patent applications in foreign countries, for use in the field of heart muscle regeneration. However, the discoveries or technologies covered by these patents and patent licenses may not have any value or provide us with a competitive advantage and many of these discoveries or technologies may not be applicable to our product candidates at all. With the exception of the technology related to MyoCell, we have devoted limited resources to identifying competing technologies that may have a competitive advantage relative to ours, especially those competing technologies that are not perceived as infringing on our intellectual property rights. In addition, the standards that courts use to interpret and enforce patent rights are not always applied predictably or uniformly and can change, particularly as new technologies develop. Consequently, we cannot be certain as to how much protection, if any, will be afforded by these patents with respect to our products if we or our licensors attempt to enforce these patent rights and those rights are challenged in court.

      The existence of third party patent applications and patents could significantly limit our ability to obtain meaningful patent protection. If patents containing competitive or conflicting claims are issued to third parties, we may be enjoined from pursuing research, development or commercialization of product candidates or may be required to obtain licenses, if available, to these patents or to develop or obtain alternative technology. If another party controls patents or patent applications covering our product candidates, we may not be able to obtain the rights we need to those patents or patent applications in order to commercialize our product candidates or we may be required to pay royalties, which could be substantial, to obtain licenses to use those patents or patent applications. We believe we will need to, among other things, license additional intellectual property to commercialize a number of our product candidates, including MyoCell II with SDF-1, in the form we believe may prove to be the most safe and/or effective.

      In addition, issued patents may not provide commercially meaningful protection against competitors. Other parties may seek and/or be able to duplicate, design around or independently develop products having effects similar or identical to our patented product candidates that are not within the scope of our patents. For example, we believe that a number of our competitors have proposed catheter designs that are apparently intended to avoid infringing upon our catheter related technology.

      Limitations on patent protection in some countries outside the United States, and the differences in what constitutes patentable subject matter in these countries, may limit the protection we have under patents issued outside of the United States. We do not have patent protection for our product candidates in a number of our target markets and, under our license agreements, we may not have the right to initiate proceedings to obtain patents in those countries. The failure to obtain adequate patent protection for our product candidates in any country would impair our ability to be commercially competitive in that country.

Litigation or other proceedings relating to patent and other intellectual property rights could result in substantial costs and liabilities and prevent us from commercializing our product candidates.

      Our commercial success depends significantly on our ability to operate in a way that does not infringe or violate the intellectual property rights of third parties in the United States and in foreign countries. Except for the complaint filed against us by Dr. Law and Cell Transplants Asia, we are not currently a party to any litigation or other adverse proceeding with regard to our patents or intellectual property rights. However, the biotechnology, biopharmaceutical and medical device industries are characterized by a large number of patents and patent filings and frequent litigation based on allegations of patent infringement. Competitors may have filed patent applications or have been issued patents and may obtain additional patents and proprietary rights related to products or processes that compete with or are similar to ours. We may not be aware of all of the patents potentially adverse to our interests that may have been issued to others. Because patent applications can take many years to issue, there may be currently pending applications, unknown to us, which may later result in issued patents that our product candidates or proprietary technologies may infringe. Third parties may claim that our products or related technologies infringe their patents. Further, we, or our licensors,

may need to participate in interference, opposition, protest, reexamination or other potentially adverse proceedings in the U.S. Patent and Trademark Office or in similar agencies of foreign governments with regards to our patents and intellectual property rights. In addition, we or our licensors may need to initiate suits to protect our intellectual property rights.

      Certain of our competitors in the field have acquired patents which might be used to attempt to prevent commercialization of MyoCell. We are aware of at least three such patent families. We believe the patents in these three families are narrow, and that we do not infringe any valid claims of these patents in our current practice. The U.S. Patent and Trademark Office has commenced a re-examination relating to one of these patent families. There is no assurance that we will receive a favorable ruling in this proceeding. In the event that the proceeding fails to result in limitation of the claims of the subject patent, such outcome may have a material adverse effect on our business, financial condition and results of operation.

      Litigation or any other proceeding relating to intellectual property rights, even if resolved in our favor, may cause us to incur significant expenses, divert the attention of our management and key personnel from other business concerns and, in certain cases, result in substantial additional expenses to license technologies from third parties. Some of our competitors may be able to sustain the costs of complex patent litigation more effectively than we can because they have substantially greater resources. An unfavorable outcome in any patent infringement suit or other adverse intellectual property proceeding could require us to pay substantial damages, including possible treble damages and attorneys’ fees, cease using our technology or developing or marketing our products, or require us to seek licenses, if available, of the disputed rights from other parties and potentially make significant payments to those parties. There is no guarantee that any prevailing party would offer us a license or that we could acquire any license made available to us on commercially acceptable terms. Even if we are able to obtain rights to a third party’s patented intellectual property, those rights may be non-exclusive and therefore our competitors may obtain access to the same intellectual property. Ultimately, we may be unable to commercialize our product candidates or may have to cease some of our business operations as a result of patent infringement claims, which could materially harm our business. We cannot guarantee that our products or technologies will not conflict with the intellectual property rights of others.

      If we need to redesign our products to avoid third party patents, we may suffer significant regulatory delays associated with conducting additional studies or submitting technical, cell culturing, manufacturing or other information related to any redesigned product and, ultimately, in obtaining regulatory approval. Further, any such redesigns may result in less effective and/or less commercially desirable products if the redesigns are possible at all.

      Additionally, any involvement of us in litigation in which we or our licensors are accused of infringement may result in negative publicity about us or our products, injure our relations with any then-current or prospective customers and marketing partners and cause delays in the commercialization of our products.

If we are not able to protect and control unpatented trade secrets, know-how and other technological innovation, we may suffer competitive harm.

      In addition to patented intellectual property, we also rely on unpatented technology, trade secrets, confidential information and proprietary know-how to protect our technology and maintain our competitive position, especially when we do not believe that patent protection is appropriate or can be obtained. Trade secrets are difficult to protect. In order to protect proprietary technology and processes, we rely in part on confidentiality and intellectual property assignment agreements with our employees, consultants and others. These agreements generally provide that the individual must keep confidential and not disclose to other parties any confidential information developed or learned by the individual during the course of the individual’s relationship with us except in limited circumstances. These agreements generally also provide that we shall own all inventions conceived by the individual in the course of rendering services to us. These agreements may not effectively prevent disclosure of confidential information or result in the effective assignment to us of intellectual property, and may not provide an adequate remedy in the event of unauthorized disclosure of confidential information or other breaches of the agreements. In addition, others may independently discover trade secrets and proprietary information that have been licensed to us or that we own, and in such case we

could not assert any trade secret rights against such party. Enforcing a claim that a party illegally obtained and is using trade secrets that have been licensed to us or that we own is difficult, expensive and time-consuming, and the outcome is unpredictable. In addition, courts outside the United States may be less willing to protect trade secrets. Costly and time-consuming litigation could be necessary to seek to enforce and determine the scope of our proprietary rights, and failure to obtain or maintain trade secret protection could have a material adverse effect on our business. Moreover, some of our academic institution licensors, collaborators and scientific advisors have rights to publish data and information to which we have rights. If we cannot maintain the confidentiality of our technologies and other confidential information in connection with our collaborations, our ability to protect our proprietary information or obtain patent protection in the future may be impaired, which could have a material adverse effect on our business.

Other Risks Related to Our Business

Our operations are consolidated primarily in one facility. A disaster at this facility is possible and could result in a prolonged interruption of our business.

      All of our administrative operations and substantially all of our U.S. cell culturing operations are located at our facilities in Sunrise, Florida. Our business is and will continue to be influenced by local economic, financial and other conditions affecting the South Florida area. This may include prolonged or severe inclement weather in the South Florida area or a catastrophic event such as a hurricane, tropical storm or tornado, all of which are common events in Florida. In 2005, two named storms made landfall in the South Florida area. Hurricane and tropical storm damage could adversely affect our financial condition in a number of ways. Although we have a back-up generator and fuel tank capable of powering our offices for an estimated five to seven days in the event of a power outage, damage to our offices, road inaccessibility, flooding and employee dislocation could result in our inability to advance our research efforts or provide cell culturing services, temporary closure and the inability of our employees to report for work.

We depend on attracting and retaining key management and scientific personnel and the loss of these personnel could impair the development of our products candidates.

      Our success depends on our continued ability to attract, retain and motivate highly qualified management, clinical and scientific personnel and on our ability to develop and maintain important relationships with academic institutions, clinicians and scientists. In March 2007, we hired Mr. William M. Pinon to serve as our Chief Executive Officer and Mr. Howard J. Leonhardt, who served as our Chief Executive Officer from inception until March 2007, has been appointed as our Executive Chairman and Chief Technology Officer. We are highly dependent upon our senior scientific staff, many of whom have developed very specialized expertise in their position. The loss of services of one or more members of our senior scientific staff could significantly delay or prevent the successful completion of our clinical trials or commercialization of our product candidates. The employment of each of our employees with us is “at will,” and each employee can terminate his or her employment with us at any time. We do not have a succession plan in place for any of our officers and key employees. Although we are seeking to secure “key person” insurance on Mr. Leonhardt and Mr. Pinon, we do not carry insurance on any of our other key employees and, accordingly, their death or disability may have a material adverse effect on our business.

      The competition for qualified personnel in the life sciences field is intense. We will need to hire additional personnel, including regulatory and sales personnel, as we continue to expand our development activities. We may not be able to attract and retain quality personnel on acceptable terms given our geographic location and the competition for such personnel among life sciences, biotechnology, pharmaceutical and other companies. If we are unable to attract new employees and retain existing employees, we may be unable to continue our development and commercialization activities and our business may be harmed.

If we acquire other businesses and technologies our performance may suffer.

      If we are presented with opportunities, we may seek to acquire additional businesses and/or technologies. The acquisition of businesses and technologies may require significant expenditures and management

resources that could otherwise be available for development of other aspects of our business and, despite the expenditures and use of resources, we may not immediately seek to further develop such technologies or seek to develop such technologies at all. In the past, we have expended resources to acquire rights to future product candidates which we have not chosen to develop to date as we have focused our efforts on the development of our lead product candidate. Future acquisitions may require the issuance of additional shares of stock or other securities which would further dilute your investment or the incurrence of additional debt and liabilities which could create additional expenses, any of which may negatively impact our financial results and result in restrictions on our business that may harm our future outlook and cause our stock price to decline.

We may not be able to effectively manage our future growth.

      If we are able to commercialize one or more of our product candidates, we may not be able to manage future growth following such commercialization because:

      Although certain members of our management team have prior experience in successfully developing, seeking regulatory approval for and commercializing medical products, we have never successfully developed, obtained regulatory approval for and commercialized any drug, device or therapy or operated our business outside of the development stage and our ability to successfully do so is unproven. Any inability to manage our growth effectively could adversely affect our business.

Expansion into international markets is important to our long-term success, and our inexperience in operations outside the United States increases the risk that our international operations may not be successful.

      We believe that our future growth depends on obtaining regulatory approvals to sell our product candidates in foreign countries and our ability to sell our product candidates in those countries. It is our intention to initially seek regulatory approval of MyoCell in certain countries in Europe. We and our management team have only limited experience with operations outside the United States. We believe that many of the risks we face in the United States are heightened in international markets because, among other things, our existing management team has devoted the vast majority of their professional careers to businesses located in the United States. As a result, our management team may be more likely than their European counterparts to inaccurately assess, estimate or project:

      In addition, our goal of selling our products into international markets will require management attention and resources and is subject to inherent risks, which may adversely affect us, including:

      These factors and other factors could adversely affect our ability to execute our international marketing strategy or otherwise have a material adverse effect on our business.

Because we have operated as a private company, we have no experience complying with public company obligations. Compliance with these requirements will increase our costs and require additional management resources, and we may still fail to comply.

      We will incur significant additional legal, accounting, insurance and other expenses as a result of being a public company that we have not incurred as a private company. For example, laws and regulations affecting public companies, including the provisions of the Sarbanes-Oxley Act of 2002, or the Sarbanes-Oxley Act, and rules related to corporate governance and other matters subsequently adopted by the Securities and Exchange Commission, or the SEC, and the NASDAQ Global Market will result in substantially increased costs to us, including legal and accounting costs, and may divert our management’s attention from other matters that are important to our business. These rules and any related regulations that may be proposed in the future will likely make it more difficult or more costly for us to obtain certain types of insurance, including directors’ and officers’ liability insurance, and we may be forced to accept reduced policy limits and coverage or incur substantially higher costs to obtain the same or similar coverage. The impact of these laws, rules and regulations could also make it more difficult for us to attract and retain qualified persons to serve on our board of directors, our board committees or as executive officers. We cannot predict or estimate the amount of the additional costs we may incur, but we expect our operating results will be adversely affected by the costs of operating as a public company.

Our internal control over financial reporting may be insufficient to detect in a timely manner misstatements that could occur in our financial statements in amounts that may be material.

      In connection with the audit of our financial statements for the year ended December 31, 2005, we identified a significant deficiency in our internal control over financial reporting which constituted a material weakness. A material weakness is a significant deficiency, or combination of significant deficiencies, that results in more than a remote likelihood that a material misstatement of the annual or interim financial statements will not be prevented or detected. The significant deficiency related to our year-end closing methodologies and was based on the number and size of year-end adjustments we recorded. As of December 31, 2006, our management determined that this material weakness and significant deficiency was remedied through, among other things, our addition of a chief financial officer and corporate controller. We may still experience material weaknesses and significant deficiencies in the future, which, if not remediated, may render us unable to prevent or detect in a timely manner material misstatements that could occur in our monthly or interim financial statements.

Failure to achieve and maintain effective internal control over financial reporting in accordance with Section 404 of the Sarbanes-Oxley Act could have a material adverse effect on our business.

      As a public company, within the next 24 months, we will be required to document and test our internal financial control procedures in order to satisfy the requirements of Section 404 of the Sarbanes-Oxley Act, which will require annual management assessments of the effectiveness of our internal control over financial reporting and a report by our independent auditors that both addresses management’s assessments and provides for the independent auditor’s assessment of the effectiveness of our internal control over financial reporting. During the course of our testing, we may identify deficiencies which we may not be able to remediate in time to meet our deadline for compliance with Section 404, and we may also identify inaccuracies or deficiencies in our financial reporting that could require revisions to or restatement of prior period results. Testing and maintaining internal control over financial reporting also will involve significant

costs and can divert our management’s attention from other matters that are important to our business. We may not be able to conclude on an ongoing basis that our internal control over financial reporting is effective in accordance with Section 404, and our independent registered public accounting firm may not be able or willing to issue a favorable assessment of our conclusions. Failure to achieve and maintain an effective internal control environment could harm our operating results and could cause us to fail to meet our reporting obligations and could require that we restate our financial statements for prior periods, any of which could cause investors to lose confidence in our reported financial information and cause a decline, which could be material, in the trading price of our common stock.

We face intense competition in the biotechnology and healthcare industries.

      We face, and will continue to face, intense competition from pharmaceutical, biopharmaceutical, medical device and biotechnology companies developing heart failure treatments both in the United States and abroad, as well as numerous academic and research institutions, governmental agencies and private organizations engaged in drug discovery activities or funding both in the United States and abroad. We also face competition from entities and healthcare providers using more traditional methods, such as surgery and pharmaceutical regimens, to treat heart failure. We believe there are a substantial number of heart failure products under development by numerous pharmaceutical, biopharmaceutical, medical device and biotechnology companies, and it is likely that other competitors will emerge. We are also aware of several competitors developing cell-based therapies for the treatment of heart damage, including MG Biotherapeutics, LLC (a joint venture between Genzyme Corporation and Medtronic, Inc.), Mytogen, Inc., Baxter International, Inc., Osiris Therapeutics, Inc., Viacell, Inc., Cytori Therapeutics, Inc. and potentially others. We also recognize that there may be competitors and competing technologies, therapies and/or products that we are not aware of.

      These third parties also compete with us in recruiting and retaining qualified personnel, establishing clinical trial sites and registering patients for clinical trials, as well as acquiring or licensing intellectual property and technology. Many competitors have more experience than we do in research and development, marketing, cell culturing, manufacturing, preclinical testing, conducting clinical trials, obtaining FDA and foreign regulatory approvals and marketing approved products. The competitors, some of which have their own sales and marketing organizations, have greater financial and technical resources than we do and may be better equipped than we are to sell competing products, obtain patents that block or otherwise inhibit our ability to further develop and commercialize our product candidates, obtain approvals from the FDA or other regulatory agencies for products more rapidly than we do, or develop treatments or cures that are safer or more effective than those we propose to develop. In addition, academic institutions, governmental agencies, and other public and private organizations conducting research in the field of heart damage may seek patent protection with respect to potentially competitive products or technologies and may establish exclusive collaborative or licensing relationships with our competitors.

      MyoCell is a clinical therapy designed to be utilized at least a few months after a patient has suffered heart damage. Our competitors may discover technologies and techniques for the acute treatment of heart failure, which, if successful in treating heart failure shortly after its occurrence, may reduce the market size for treatments for chronic heart damage, including MyoCell.

Our industry is subject to rapid technological change.

      Our industry is subject to rapid technological change and our cellular-based therapies involve new and rapidly developing technology. Our competitors may discover and develop new technologies and techniques, or enter into partnerships with collaborators in order to develop, competing products that are more effective or less costly than the product candidates we hope to secure regulatory approval for. In light of the industry’s limited experience with cell-based therapies and the dedication of significant resources to a better understanding of this field, we expect these cell-based technologies to undergo significant change in the future. For example, some of our competitors are exploring whether the use of cells, other than myoblasts, is safer or more effective than MyoCell. If there is rapid technological development or new product introductions, our current and future product candidates or methods may become obsolete or noncompetitive before or after we commercialize them.

We have a contingent liability under California law due to our issuances of some securities that may have violated California securities laws.

      We believe that we may have issued options to purchase common stock and common stock upon conversion of options to certain of our employees, directors and consultants in California in violation of the registration or qualification provisions of applicable California securities laws. As a result, we intend to make a rescission offer to these persons pursuant to a registration statement we expect to file after the offering under the Securities Act and pursuant to California securities laws. We will make this offer to all persons who have a continuing right to rescission, which we believe to include three persons. In the rescission offer, in accordance with California law, we will offer to repurchase all unexercised options issued to these persons at 20% of the option exercise price times the number of option shares, plus interest at the rate of 10% from the date the options were granted. We will also offer to repurchase all shares issued to these persons at the fair market value of such shares on the date of issuance. Based upon the number of securities that may be subject to rescission as of May 31, 2007, assuming that all such securities are tendered in the rescission offer, we estimate that our total rescission liability would be approximately $100,000.

Risks Related to This Offering

There is no prior public market for our stock. Our stock price may be volatile and you may be unable to sell your shares at or above the offering price.

      There previously has been no public market for our common stock. The initial public offering price for our shares was determined by negotiations between us and representatives of the underwriters and does not purport to be indicative of prices that will prevail in the trading market. The market price of our common stock could be subject to wide fluctuations in response to many risk factors described in this section and other matters, including:

      Furthermore, the stock markets have experienced extreme price and volume fluctuations that have affected and continue to affect the market prices of equity securities of many companies, especially life sciences and pharmaceutical companies. These fluctuations often have been unrelated or disproportionate to the operating performance of those companies. These broad market and industry fluctuations, as well as general economic, political and market conditions, may negatively affect the market price of our common stock. As a result, the market price of our common stock is likely to be similarly volatile and investors in our common stock may experience a decrease, which could be substantial, in the value of their stock. In the past,

many companies that have experienced volatility in the market price of their stock have been subject to securities class action litigation. We may be the target of this type of litigation in the future. Securities litigation against us could result in substantial costs and divert our management’s attention from other business concerns, which could have a material adverse effect on our business.

Our existing shareholders, including Mr. Leonhardt, have significant control of our management and affairs, which they could exercise against your best interests.

      Immediately following the completion of this offering, based on shares outstanding as of                     , 2007, our executive officers and directors and persons and entities that were our shareholders prior to this offering will beneficially own an aggregate of approximately      % of our outstanding common stock, or approximately      % of our outstanding common stock if the underwriters’ over-allotment option is exercised in full. In particular, Mr. Leonhardt will own approximately      % of our outstanding common stock immediately following this offering, or approximately      % of our outstanding common stock if the underwriters’ over-allotment option is exercised in full, in each case based on shares outstanding as of                     , 2007. As a result, Mr. Leonhardt currently has, and will continue to have, a significant influence over the outcome of all corporate actions requiring shareholder approval. Consequently, this concentration of ownership may have the effect of delaying or preventing a change of control, including a merger, consolidation or other business combination involving us, or discouraging a potential acquirer from making a tender offer or otherwise attempting to obtain control, even if such a change of control would benefit our other shareholders. The interests of these shareholders may not coincide with our interests or the interests of other shareholders.

An active trading market for our common stock may not develop.

      This is our initial public offering of common stock, and prior to this offering there has been no public market for our common stock. The initial public offering price for our common stock will be determined through negotiations with the representatives of the underwriters. Although we have applied to have our common stock approved for quotation on the NASDAQ Global Market, an active trading market for our common stock may never develop or be sustained following this offering. If an active market for our common stock does not develop, it may be difficult for you to sell shares you purchase in this offering without depressing the market price for our common stock.

If you purchase shares of common stock sold in this offering, you will experience immediate and substantial dilution. You may also experience dilution in the future.

      The initial public offering price per share is substantially higher than the net tangible book value per share immediately after the offering. As a result, you will pay a price per share that substantially exceeds the book value of our assets after subtracting our liabilities. Assuming an offering price of $                    , the midpoint of the range set forth on the cover of this prospectus, you will incur immediate and substantial dilution of $                    in the net tangible book value per share of the common stock from the price you paid. We also have outstanding stock options to purchase 3,441,884 shares of our common stock at a weighted average exercise price of $3.24 per share as of the end of the first quarter of 2007 and outstanding warrants to purchase 364,772 shares of our common stock at a weighted average exercise price of $3.68 per share as of the end of the first quarter of 2007. To the extent that options and warrants with an exercise price less than the initial public offering price are exercised, there will be further dilution.

      Under certain of our patent license agreements, including our license agreements with Cell Transplants International and the Cleveland Clinic, we are required to make certain large milestone payments upon our achievement of certain development and commercialization objectives. We may be required to or, to the extent we do not have the cash resources necessary to satisfy our obligations may seek to, issue shares or other securities in satisfaction of our financial obligations under these license agreements. To the extent we issue shares at a price per share less than the initial public offering price per share, you will incur dilution in the net tangible book value per share.

Following this offering, a substantial number of our shares of common stock will become available for sale in the public market, which may cause the market price of our stock to decline.

      Sales of our common stock in the public market following this offering, or the perception that those sales may occur, could cause the market price of our common stock to decline. Immediately upon completion of this offering, we will have                     outstanding shares of common stock based on shares outstanding as of                     , 2007. In general, the shares sold in this offering will be freely tradable without restriction, assuming they are not held by our affiliates. The remaining                      shares of common stock outstanding after this offering will be available for sale in the public markets, pursuant to Rule 144 or Rule 701 under the Securities Act of 1933, or the Securities Act, 180 days (subject to extension for up to an additional 34 days under limited circumstances as described under “Underwriting”) after the completion of this offering following the expiration of lock-up agreements entered into by our directors and officers and holders of more than 1% of our common stock for the benefit of the underwriters.

      In addition, we intend to file one or more registration statements to register shares of common stock subject to outstanding stock options and warrants and common stock reserved for issuance under our Officers and Employees Stock Option Plan and Directors and Consultants Stock Option Plan. We expect these additional registration statements to become effective immediately upon filing.

      Furthermore, immediately after completion of this offering, the holders of                      shares of our outstanding common stock will also have the right to require that we register those shares under the Securities Act on several occasions and will also have the right to include those shares in any registration statement we file with the SEC, subject to exceptions, which would enable those shares to be sold in the public markets, subject to the restrictions under lock-up agreements referred to above.

      Any or all shares subject to the lock-up agreements may be released, without notice to the public, for sale in the public markets prior to expiration of the lock-up period at the discretion of BMO Capital Markets Corp.

Our management has broad discretion in the use of the net proceeds from this offering and may not use them effectively.

      As of the date of this prospectus, we cannot specify with certainty the amount of net proceeds from this offering that we will spend on particular uses. Although our management currently intends to use the net proceeds in the manner described in “Use of Proceeds,” it will have broad discretion in the application of the net proceeds. The failure by our management to apply these funds effectively could adversely affect our ability to continue to maintain and expand our business.

Anti-takeover provisions of Florida law, our articles of incorporation and our bylaws may prevent or delay an acquisition of us that shareholders may consider favorable or attempts to replace or remove our management that could be beneficial to our shareholders.

      Our articles of incorporation and bylaws contain provisions, such as the right of our directors to issue preferred stock from time to time with voting, economic and other rights superior to those of our common stock without the consent of our shareholders, all of which could make it more difficult for a third party to acquire us without the consent of our board of directors. In addition, our bylaws impose restrictions on the persons who may call special shareholder meetings. Furthermore, the Florida Business Corporation Act contains an “affiliated transaction” provision that prohibits a publicly-held Florida corporation from engaging in a broad range of business combinations or other extraordinary corporate transactions with an “interested shareholder” unless, among others, (i) the transaction is approved by a majority of disinterested directors before the person becomes an interested shareholder; (ii) the interested shareholder has owned at least 80% of the corporation’s outstanding voting shares for at least five years; or (iii) the transaction is approved by the holders of two-thirds of the corporation’s voting shares other than those owned by the interested shareholder. An interested shareholder is defined as a person who together with affiliates and associates beneficially owns more than 10% of the corporation’s outstanding voting shares. The Florida Business Corporation Act also prohibits the voting of shares in a publicly-held Florida corporation that are acquired in a “control share acquisition” unless the holders of a majority of the corporation’s voting shares (exclusive of shares held by

officers of the corporation, inside directors or the acquiring party) approve the granting of voting rights as to the shares acquired in the control share acquisition or unless the acquisition is approved by the corporation’s Board of Directors. These provisions may have the effect of delaying or preventing a change of control of our company even if this change of control would benefit our shareholders.

We do not intend to pay cash dividends on our common stock in the foreseeable future and, accordingly, capital appreciation of our common stock, if any, will be a shareholder’s sole source of gain from an investment in our common stock.

      Our policy is to retain earnings to provide funds for the operation and expansion of our business and, accordingly, we have never declared or paid any cash dividends on our common stock or other securities and do not currently anticipate paying any cash dividends in the foreseeable future. Consequently, shareholders will need to sell shares of our common stock to realize a return on their investments, if any and this capital appreciation, if any, will be a shareholder’s sole source of gain from an investment in the common stock. The declaration and payment of dividends by us are subject to the discretion of our Board of Directors and the restrictions specified in our articles of incorporation and by applicable law. In addition, under the terms of the BlueCrest Loan, we are restricted from paying cash dividends to our shareholders while this loan is outstanding. Any future determination to pay cash dividends will depend on our results of operations, financial condition, capital requirements, contractual restrictions and other factors deemed relevant by our Board of Directors.