UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

 

FORM 8-K

 

CURRENT REPORT

 

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

 

Date of Report (Date of earliest event reported) May 24, 2021 

 

Hoth Therapeutics, Inc.

(Exact name of registrant as specified in its charter)

 

Nevada   001-38803   82-1553794
(State or other jurisdiction
of incorporation)
  (Commission File Number)   (I. R. S. Employer
Identification No.)

 

1 Rockefeller Plaza, Suite 1039
New York, New York 10020
(Address of principal executive offices, including ZIP code)
 
(646) 756-2997
(Registrant’s telephone number, including area code)
 
Not Applicable
(Former name or former address, if changed since last report)

 

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

 

Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

 

Securities registered pursuant to Section 12(b) of the Act:

 

Title of each class   Trading Symbol(s)   Name of each exchange on which registered
Common stock, $0.0001 par value   HOTH   The Nasdaq Stock Market LLC

 

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

 

Emerging growth company  

 

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.

 

 

 

 

 

 

Item 8.01 Other Events.

 

Hoth Therapeutics, Inc. (the “Company”) has prepared presentation materials (the “Presentation Materials”) that management intends to use from time to time on and after May 24, 2021. The Presentation Materials are filed as Exhibit 99.1 and 99.2. to this Current Report on Form 8-K.

 

The information contained in the Presentation Materials is summary information that should be considered within the context of the Company’s filings with the Securities and Exchange Commission and other public announcements that the Company may make by press release or otherwise from time to time. The Presentation Materials speak as of the date of this Current Report on Form 8-K. While the Company may elect to update the Presentation Materials in the future or reflect events and circumstances occurring or existing after the date of this Current Report on Form 8-K, the Company specifically disclaims any obligation to do so.

 

Item 9.01 Financial Statements and Exhibits.

 

(d) Exhibits.

 

Exhibit No.   Description
99.1   Presentation Materials – HT-KIT
99.2   Presentation Materials – HT-001 Topical Gel

 

1

 

 

SIGNATURES

 

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

 

Date: May 24, 2021 Hoth Therapeutics, Inc.
   
  /s/ Robb Knie
  Robb Knie
  Chief Executive Officer

 

 

2

 

 

Exhibit 99.1

Introduction to HT - KIT an mRNA Frame Shifting Therapeutic Significantly Inhibits Tumor Growth in Mast Cell - Derived Cancers

 

 

Safe Harbor Statement This presentation contains "forward - looking statements" within the meaning of the “safe - harbor” provisions of the Private Securities Litigation Reform Act of 1995 . These statements are identified by the use of words “could,” “believe,” “anticipate,” “intend,” “estimate,” “expect,” “may,” “continue,” “predict,” “potential” and similar expressions that are intended to identify forward - looking statements . Such statements involve known and unknown risks, uncertainties and other factors that could cause the actual results of Hoth Therapeutics, Inc . (“Hoth” or the “Company”) to differ materially from the results expressed or implied by such statements . These forward - looking statements are made on the basis of the current beliefs, expectations and assumptions of management, are not guarantees of performance and are subject to significant risks and uncertainty . These forward - looking statements should, therefore, be considered in light of various important factors, including those set forth in Hoth’s reports that it files from time to time with the Securities and Exchange Commission (the “Commission”) and which you should review, including those statements under “Item 1 A – Risk Factors” in Hoth’s Annual Report on Form 10 - K, as amended by its Quarterly Reports on Form 10 - Q and other reports that Hoth files with the Commission . Important factors that could cause actual results to differ materially from those described in forward - looking statements contained in this presentation include, but are not limited to : the adverse impact on economies around the world of the current COVID - 19 pandemic ; changes to our anticipated sources of revenues ; competitive conditions ; difficulties in obtaining regulatory approvals for the Company’s product candidates ; changes in economic and political conditions ; the success of our research and development initiates ; and other factors . These forward - looking statements should not be relied upon as predictions of future events and Hoth cannot assure you that the events or circumstances discussed or reflected in these statements will be achieved or will occur . If such forward - looking statements prove to be inaccurate, the inaccuracy may be material . You should not regard these statements as representation or warranty by Hoth or any other person that we will achieve our objectives and plans in any specified timeframe, or at all . You are cautioned not to place undue reliance on these forward - looking statements, which speak only as of the date of this presentation . The Company disclaims any obligations to publicly update or release any revisions to the forward - looking information contained in this presentation, whether as a result of new information, future events or otherwise, after the date of this presentation or to reflect the occurrence of unanticipated events, except as required by law .

 

 

H T - KIT HT - KIT is a novel antisense oligonucleotide under development for the treatment of cancers resulting from aberrant KIT signaling . The HT - KIT drug is designed to more specifically target the receptor tyrosine kinase KIT, which is required for the proliferation, survival and differentiation of bone marrow - derived hematopoietic stem cells . Mutations in the KIT pathway have been associated with several human cancers, such as mast cell - derived cancers (aggressive systemic mastocytosis (ASM), systemic mastocytosis with associated hematological neoplasm (SM - AHN), or mast cell leukemia (MCL)), gastrointestinal stromal tumors, and acute myeloid leukemia . HT - KIT is currently in the pre - clinical stage of development .

 

 

Targeting KIT by frameshifting mRNA transcripts as a therapeutic strategy for aggressive mast cell neoplasms Douglas B. Snider 1 , Greer K. Arthur 1 , Guido H. Falduto 2 , Ana Olivera 2 , Lauren C. Ehrhardt - Humbert 1 , Emmaline Smith 1 , Cierra Smith 1 , Dean D. Metcalfe 2 and Glenn Cruse 1 1 Department of Molecular Biomedical Sciences, CVM, NC State University 2 Laboratory of Allergic Diseases, NIAID, NIH Fig . 1 . ESO - mediated alternative splicing of exon 4 in c - KIT pre - mRNA . (A) HT - KIT ESO was designed to target the donor splice site of exon 4 , which led to exclusion of exon 4 by the spliceosome . This is predicted to introduce a premature stop codon due to a frameshift in the open reading frame of the mRNA transcript . Yellow boxes represent exons ; thick black bar rep r ese n ts intron s . F L - c - KIT = full - length c - R T - P CR KI T , t - c - KIT = trun c ated c - KI T . (B) demonstrating splice - switching of c - KIT by HT - KIT ESO in comparison to control oligo in HMC - 1. 2 cel l s. Black arrow = ful l - length c - KI T , orange arrow = alternatively spliced truncated c - KIT mRNA . (C) qRT - PCR of KIT transcripts in HMC - 1 . 2 cells demonstrates a significant reduction in KIT mRNA transcripts with HT - KIT relative to control cells after correction against β - acti n . Figure 1

 

 

Fi g . 2. H T - KIT ESO reduc e s KIT e x p r e s s i on a n d in d uces apopt o s i s o f neoplas t ic hu m an ma s t cell s . (A) Mean flow cytometry data for total KIT expression calculated from the geometric MFI. (B) Combined data from flow cytomet r y for Annexin V expre s sed a s the ge o metric MF I . (C) C o m b i n e d geome t ric MFI of HMC - 1.2 cells in culture. LIVE/DEAD staining in HMC - 1.2 cells at each time point. (D) Viable cell counts of Data are the mean “ SEM from 3 independent experiments. *p<0.05, **p<0.01, ***p<0.001, ANOVA with Sidak’s post - test. Figure 2

 

 

Fig. 4. Systemic delivery of human HT - KIT ESO inhibits tumor growth in a humanized xenograft mast cell neoplasia model . The top schematic representation of the protocol for the xenograft model used . ( A ) Examples of tumors in mice during treatment . The red arrows indicate the tumor and the green arrows show a secondary growth caused by drag of the needle during inoculation . ( B ) Measurements of tumor volume over time during treatment . Arrows indicate days that HT - KIT or vehicle control was administered . ( C ) Photograph of tumors after mice were euthanized at day 14 . Measurements are in centimeters . ( D ) Weight of excised tumors after mice were euthanized on day 14 . ( E ) Spleen weight at the conclusion of the experiment . ( F ) Liver weight at the conclusion of the experiment . ( G ) Mice weight was monitored over the course of the experiment . No significant differences were observed over the course of the experiment . Data are the mean “ SEM from 5 mice per group . *p< 0 . 05 , **p< 0 . 01 , ***p< 0 . 001 . ANOVA with Dunnett’s post - test ( B ), or unpaired t - test ( D & E ) . Figure 3

 

 

Fig . 4 . HT - KIT ESOs redu c e liver of ne o plas t ic mast cells i n a infiltration humanized neoplasia. ( A - D) Example li v er sections from xen o graft m odel o f mast ce l l NSG mice showing neoplastic mast cell infiltrates with H & E (A) and IHC for human KIT (B) in the vehicle control liver and almost no infiltrates in the H T - KIT t r eated livers (C Histopathological assessment neoplastic infiltration in l i v e r . & D ) . (E) o f % of (F) Histopatholo g ical assessm e nt of neop l astic foci size i n liver s . Gr a phic a l re p rese n tati o n of data includes box where middle bar plots and whiskers rep r esent represents median m i ni m um and m a xi m u m . determined by Fisher’s LSD The p - value was test with ordinary on e - w a y A N O VA or uncorrecte d Dunn’ s test with Kruskal - Wallis one - way ANOVA. *p≤0.05, **p≤0.01, ***p≤0.001, ****p≤0.0001 Figure 4

 

 

Figure 5 Fi g . 5. H T - KIT E S O reduces tumor g r owth in an isograft model of MC neoplasia. P 815 cells were transduced to make intracellular luciferase . (A) DBA/ 2 J female mice protocol for the isograft model . Vehicle control or HT - KIT ESO was administered every 3 days . (B) Bioluminescence from P 815 neoplastic cells was significantly reduced in intraturmoral (IT) (p= 0 . 0007 ) and intravenous (IV) (p= 0 . 0220 ) HT - KIT ESO treatment groups compared to controls . (C - E) IVIS images overlay primary site tumor where bioluminescent P 815 neopl astic cells were detected . Equal - sized ROIs over the primary tumor site standardized area for photon flux (total counts) detected from all mice on study (representative images shown) . (F - I) Tumor weight (F) , volume (G) , and depth (H) collectively represent decreased primary site tumor burden (F - G) and penetration into underlying structures (H) for IT and IV HT - KIT treatment groups compared to controls. (F) T umor m a ss was r e du c e d for I T (p = 0 .013 2 ) an d IV (p=0.0674) HT - KIT ESO treatment group compared to controls. (G) T umor volume w as reduced for I T (p= 0 .018 8 ) a nd IV (p=0.0530) HT - KIT ESO treatment group compared to controls. (H) Tumor depth was significantly reduced for IT (p <0.0001) a nd I V (p = 0 .000 8 ) H T - KIT ESO tre a tment g ro up compa r ed to controls . (G) Tumor necrosis was increased for IT (p= 0 . 0434 ) and IV (p= 0 . 0588 ) HT - KIT ESO treatment group compared to controls . *p≤ 0 . 05 , **p≤ 0 . 01 , ***p≤ 0 . 001 , ****p≤ 0 . 0001 .

 

 

Fig . 6 . HT - KIT ESO reduced cardinal signs of mast cell leukemia in an isograft model of mutant mast cell neoplasia . (A) Percent of m a r r ow i n filtrated by P 8 1 5 ne o pla s tic cell s . bone (B) Re p r e s e n t a t iv e micr o gra p h of bone marrow from vehicle controls (B) compared to IT (C) , and IV (D) HT - KIT ESO . (E) Displacement of hematopoietic bone marrow tissue (myelophthisis) by neoplastic mast cells . (F) Packed red blood cell volume (hematocrit) . (G) Bone marrow hematopoiesis as measured by myeloid progenitor to erythroid progenitor (M : E ratio) . (H) Circulating neoplastic mast cells on differential counts . (I) Blood smear of ne o pla s tic mast cel l s R o m a no w s ky with (representative image shown from vehicle stain cont r ol animal blood). (J) H&E histopathology assessment of ne o pla s tic embo l i an d circu l a t ing neop l a s tic cel l s in or g a ns . ( K - L) E mb o li of neop l astic mast cells in pulmonary vessels from H&E histopathology sections from control (K) and intravenous HT - KIT ESO (L) treatment groups . *p≤ 0 . 05 , **p≤ 0 . 01 , ***p≤ 0 . 001 , ****p≤0.0001. c

 

 

Targeting KIT by frameshifting mRNA transcripts as a therapeutic strategy for aggressive mast cell neoplasms Douglas B. Snider 1 , Greer K. Arthur 1 , Guido H. Falduto 2 , Ana Olivera 2 , Lauren C. Ehrhardt - Humbert 1 , Emmaline Smith 1 , Cierra Smith 1 , Dean D. Metcalfe 2 and Glenn Cruse 1 1 Department of Molecular Biomedical Sciences, CVM, NC State University 2 Laboratory of Allergic Diseases, NIAID, NIH Activating mutations in the proto - oncogene c - KIT are associated with the mast cell (MC) clonal disorders cutaneous mastocytosis, systemic mastocytosis and its variants including aggressive systemic mastocytosis and mast cell leukemia, and MC sarcoma . Currently, therapies inhibiting KIT signaling are a leading strategy to treat MC proliferative disorders . However, these approaches may have off - target effects and in some patients, complete remission or improved survival time cannot be achieved . These limitations led us to develop an approach using chemically stable exon skipping oligonucleotides (ESO) that induce exon skipping of pre - mRNA to alter gene splicing and introduce a frameshift into mature KIT mRNA transcripts . Exon - skipping c - KIT to remove exon 4 will force a frameshift in mature mRNA introducing an immediate STOP codon triggering nonsense - mediated mRNA decay . If this pathway is saturated, production of a severely truncated non - functional KIT protein would result . Both of these mechanisms would deplete functional KIT, inhibit proliferation and induce apoptosis of neoplastic MCs . This alternate approach to MC neoplasia results in marked downregulation of KIT expression, diminished KIT signaling, inhibition of MC proliferation and rapid induction of apoptosis in neoplastic HMC - 1 . 2 MCs . This downregulation of KIT expression is achieved by combining two independent mechanisms involving nonsense - mediated mRNA decay and the production of alternatively spliced non - functional proteins . We further demonstrate that in vivo administration of KIT targeting ESOs significantly inhibits tumor growth and systemic organ infiltration using both an allograft mastocytosis model and a humanized xenograft MC tumor model . We propose that our innovative approach, which employs well - tolerated, chemically stable oligonucleotides to target KIT expression through unconventional pathways, has potential as a KIT - targeted therapeutic alone, or in combination with agents that target KIT signaling, in the treatment of KIT - associated malignancies . R a ti ona l e Funding : Department of Molecular Biomedical Sciences, College of Veterinary Medicine, start - up funds (G . C . ), NCSU Center for Human Health and the Environment grant #ES 025128 , NIH T 32 OD 011130 and the Division of Intramural Research of NIAID within the National Institutes of Health . Conflict of Interest disclosure : Dr . Cruse has filed a patent application related to the research reported in this study . Dr . Cruse has research support from Hoth Therapeutics and also serves on their Scientific Advisory Board . The terms of this arrangement have been reviewed and approved by NC State University in accordance with its policy on objectivity in research . Acknowledgements Hy po t he si s Figure 2 Figure 5 Figure 3 Figure 6 Fig . 2 . HT - KIT ESO reduces KIT expression and induces apoptosis of neoplastic human mast cells . (A) Mean flow cytometry data for total KIT expression calculated from the geometric MFI . (B) Combined data from flow cytometry for Annexin V expressed as the geometric MFI . (C) Combined geometric MFI of LIVE/DEAD staining in HMC - 1 . 2 cells at each time point . (D) Viable cell counts of HMC - 1 . 2 cells in culture . Data are the mean “ SEM from 3 independent experiments . *p< 0 . 05 , **p< 0 . 01 , ***p< 0 . 001 , ANOVA with Sidak’s post - test . Fig . 5 . HT - KIT ESO reduces tumor growth in an isograft model of MC neoplasia . P 815 cells were transduced to make intracellular luciferase . (A) DBA/ 2 J pro tocol for the female i so graft HT - KIT mice model. ESO Vehicle control or w a s admi ni ster e d every 3 days. (B) Bioluminescence from P815 neoplastic cells was signi f i c an t ly redu ced in intraturmoral (IT) (p=0.0007) and intravenous (IV) (p=0.0220) HT - KIT ESO treatment groups compared to controls. (C - E) IVIS images overlay prim a ry site bioluminescent t um o r w her e P 81 5 n e op l a stic cells were detected. Equal - sized ROIs over the primary tumor site standardized area for photon flux ( total c o un t s) detected from all mice on study (representative images shown). (F - I) Tumor weight (F) , volume (G) , and depth (H) collectively represent decreased primary site tumor burden (F - G) and penetration into underlying structures (H) for IT and IV HT - KIT treatment groups compared to controls. (F) Tumor mass was reduced for IT (p=0.0132) and IV (p=0.0674) HT - KIT ESO Figure 4 Fig. 6. HT - KIT ESO reduced cardinal signs of mast cell leukemia in an isograft model of mutant mast cell bon e marro w i n fi l trated P815 neopl a stic cel l s. n e o p lasia. (A) Percent of by (B) Representative micrograph of bone marrow from vehicle controls (B) compared to IT (C) , and IV (D) HT - KIT ESO . (E) Dis pla c e ment of hematopoietic bone marrow neopl a stic mast cel l s. tissue (myelop h th i s i s) by (F) Figure 1 Fig . 1 . ESO - mediated alternative splicing of exon 4 in c - KIT pre - mRNA . (A) HT - KIT ESO was designed to target the donor splice site of exon 4 , which led to exclusion of exon 4 by the spliceosome . This is predicted to introduce a premature stop codon due to a frameshift in the open reading frame of the mRNA transcript . Yellow boxes represent exons ; thick black bar represents introns . FL - c - KIT = full - length c - KIT, t - c - KIT = truncated c - KIT . (B) RT - PCR demonstrating splice - switching of c - KIT by HT - KIT ESO in comparison to control oligo in HMC - 1 . 2 cells . Black arrow = full - length c - KIT, orange arrow = alternatively spliced truncated c - KIT mRNA . (C) qRT - PCR of KIT transcripts in HMC - 1 . 2 cells demonstrates a significant reduction in KIT mRNA transcripts with HT - KIT relative to control cells after correction against β - actin . S u mm a r y Fig . 4. S y s t e mic del i ve r y o f hu ma n HT - KIT ESO inhibits tumor growth in a humanized xenograft mast cell neoplasia model. The top schematic representation of the protocol for the xenograft model used. ( A ) Examples of tumors in mice during treatment . The red arrows indicate the tumor and the green arrows show a secondary growth caused by drag of the needle during inoculation . ( B ) Measurements of tumor volume over time during treatment . Arrows indicate days that HT - KIT or vehicle control was administered . ( C ) Photograph of tumors after mice were euthanized at day 14 . Measurements are in centimeters . ( D ) Weight of excised tumors after mice were euthanized on day 14 . ( E ) Spleen weight at the conclusion of the experiment . ( F ) Liver weight at the conclusion of the experiment . ( G ) Mice weight was monitored over the course of the experiment . No significant differences were observed over the course of the experiment. Data are the mean “ SEM from 5 mice per group. *p<0.05, **p<0.01, ***p<0.001. ANOVA with Dunnett’s post - test ( B ), or unpaired t - test ( D & E ). treatment group compared to controls . (G) Tumor volume was reduced for IT (p= 0 . 0188 ) and IV (p= 0 . 0530 ) HT - KIT ESO treatment group compared to controls . (H) Tumor depth was significantly reduced for IT (p < 0 . 0001 ) and IV (p= 0 . 0008 ) HT - KIT ESO treatment group compared to controls . (G) Tumor necrosis was increased for IT (p= 0 . 0434 ) and IV (p= 0 . 0588 ) HT - KIT ESO treatment group compared to controls . *p≤ 0 . 05 , **p≤ 0 . 01 , ***p≤ 0 . 001 , ****p≤ 0 . 0001 . Packed red blood cell volume (hematocrit) . (G) Bone marrow hematopoiesis as measured by myeloid progenitor to erythroid progenitor (M : E ratio) . (H)Circulating neoplastic mast cells on differential counts . (I) Blood smear of neoplastic mast cells with Romanowsky stain (representative image shown from vehicle control animal blood) . (J) H&E histopathology assessment of neoplastic emboli and circulating neoplastic cells in organs . (K - L) Emboli of neoplastic mast cells in pulmonary vessels from H&E histopathology sections from control (K) and intravenous HT - KIT ESO (L) treatment groups . *p≤ 0 . 05 , **p≤ 0 . 01 , ***p≤ 0 . 001 , ****p≤ 0 . 0001 . Fig . 4 . HT - KIT ESOs reduce liver infiltration of neoplastic mast cells in a humanized xenograft model of mast cell neoplasia . (A - D) Example liver sections from NSG mice showing neoplastic mast cell infiltrates with H&E (A) and IHC for human KIT (B) in the vehicle control liver and almost no infiltrates in the HT - KIT treated livers (C & D) . (E) Histopathological assessment of % of neoplastic infiltration in liver . (F) Histopathological assessment of neoplastic foci size in livers . Graphical representation of data includes box plots where middle bar represents median and whiskers represent minimum and maximum . The p - value was determined by Fisher’s LSD test with ordinary one - way ANOVA or uncorrected Dunn’s test with Kruskal - Wallis one - way ANOVA . *p≤ 0 . 05 , **p≤ 0 . 01 , ***p≤ 0 . 001 , ****p≤ 0 . 0001 .

 

Exhibit 99.2

m o c . s c NASDAQ: HOTH i t u e ap r e h t h t o h www. 1 Introduction to HT - 001 Topical Gel

 

 

www.hoththerapeutics.com N A S D A Q: HOTH 2 Safe Harbor Sta t ement This presentation contains "forward - looking statements" within the meaning of the “safe - harbor” provisions of the Private Securities Litigation Reform Act of 1995 . These statements are identified by the use of words “could,” “believe,” “anticipate,” “intend,” “estimate,” “expect,” “may,” “continue,” “predict,” “potential” and similar expressions that are intended to identify forward - looking statements . Such statements involve known and unknown risks, uncertainties and other factors that could cause the actual results of Hoth Therapeutics, Inc . (“Hoth” or the “Company”) to differ materially from the results expressed or implied by such statements . These forward - looking statements are made on the basis of the current beliefs, expectations and assumptions of management, are not guarantees of performance and are subject to significant risks and uncertainty . These forward - looking statements should, therefore, be considered in light of various important factors, including those set forth in Hoth’s reports that it files from time to time with the Securities and Exchange Commission (the “Commission”) and which you should review, including those statements under “Item 1 A – Risk Factors” in Hoth’s Annual Report on Form 10 - K, as amended by its Quarterly Reports on Form 10 - Q and other reports that Hoth files with the Commission . Important factors that could cause actual results to differ materially from those described in forward - looking statements contained in this presentation include, but are not limited to : the adverse impact on economies around the world of the current COVID - 10 pandemic ; changes to our anticipated sources of revenues ; competitive conditions ; difficulties in obtaining regulatory approvals for the Company’s product candidates ; changes in economic and political conditions ; the success of our research and development initiates ; and other factors . These forward - looking statements should not be relied upon as predictions of future events and Hoth cannot assure you that the events or circumstances discussed or reflected in these statements will be achieved or will occur . If such forward - looking statements prove to be inaccurate, the inaccuracy may be material . You should not regard these statements as representation or warranty by Hoth or any other person that we will achieve our objectives and plans in any specified timeframe, or at all . You are cautioned not to place undue reliance on these forward - looking statements, which speak only as of the date of this presentation . The Company disclaims any obligations to publicly update or release any revisions to the forward - looking information contained in this presentation, whether as a result of new information, future events or otherwise, after the date of this presentation or to reflect the occurrence of unanticipated events, except as required by law .

 

 

www.hoththerapeutics.com N A S D A Q: HOTH Introduction to HT - 001 Topical Gel • Novel Primary Indication • Treatment of mild to moderate cutaneous toxicities (skin, scalp, nails) associated with EGFR inhibitor cancer therapy • No other drugs approved for this indication • Qualifies as a “serious condition” to pursue FDA expedited programs (Fast Track, Breakthrough Designation, Priority Review) • 505(b)(2) Regulatory Pathway • Hoth has exclusive license from George Washington University for worldwide territory 3

 

 

www.hoththerapeutics.com N A S D A Q: HOTH Background: Cutaneous Toxicities Associated with EGFR Inhibitor Therapy • Currently 11 EGFR inhibitor drugs are approved by FDA for the treatment of a variety of cancer types, including breast cancer, non - small cell lung cancer (NSCLC), pancreatic cancer, colorectal cancer, squamous - cell carcinoma of the head and neck, and medullary thyroid cancer • Cutaneous toxicities are the most common side effect of EGFR inhibitor therapy • Most frequently occurring disorders include 1,2 : • papulopustular (acneiform) rash (45 to 100%) • dry and itchy skin (12 to 16%) • microbial infections (38 to 70%) • nail changes (12% – 16%) • xerosis (7% – 35%) • pruritus (10% – 16%) • alopecia (5% – 6%) • EGFR therapy dose modification (10 - 50% reduction) has been reported to occur in up to 60% of cases and discontinuation of EGFR therapy in 32% of cases 3 4

 

 

www.hoththerapeutics.com 5 N A S D A Q: HOTH Background: HT - 001 Mechanism of Action • EGFR signaling is critical to maintain skin homeostasis; inhibition results in high influx of inflammatory cells and production of proinflammatory cytokines in the skin • HT - 001 is anticipated to inhibit recruitment and activation of immune cells, reducing inflammation H T - 001 Figure adapted from Lichtenger 2013, et al

 

 

www.hoththerapeutics.com Erlotinib - Induced Dermatological Effects in Rats are Rescued by Concurrent Treatment with HT - 001 • Oral administration of 5.85 mg/kg/day erlotinib, with or without 1.15 mg/kg/day HT - 001 for 12 weeks • In comparison to erlotinib - only treatment, concomitant treatment with HT - 001 showed: • Resolution of erlotinib - induced dermatitis and hair loss • Significant reduction in substance P • Significant reduction in neutrophil activity • Restoration of cardiac dysfunction 6 N A S D A Q: HOTH HT - 001 Significantly Reduces EGFR Inhibitor - Induced Cutaneous Toxicity Co n t r ol Erlotinib Erlotinib + HT - 001

 

 

www.hoththerapeutics.com 7 N A S D A Q: HOTH HT - 001 505(b)(2) Development Pathway Current estimated dates; pending FDA meetings for phase 2b/phase 3 clinical studies NDA Submission Pre - IND Meeting Final Formulation Selection 2021 Clinical Readiness: Toxicology studies GMP Drug Manufacture Protocol Development Site Selection and Activation IND Submission Phase 2a Clinical Study (US only) 2022 EOP2 FDA Meeting 2023 2024 Phase 2b Clinical Study (TBD) 2025 Phase 3 Clinical Study(s) (TBD) Chronic Toxicology Studies R egistra t ion Batches Type C FDA Meeting In - P r oce s s 2026 2027 Pre - NDA Meeting

 

 

www.hoththerapeutics.com N A S D A Q: HOTH Success Factors • Key partnerships established for clinical readiness for IND - opening, Phase 2a dose ranging clinical trial • Worldwide Clinical Trials – CRO for protocol development and study management • Camargo Pharmaceutical Services – CRO for IND preparation and submission • Charles River Laboratories – CRO for IND - enabling toxicology studies • Pre - IND Meeting complete with positive outcomes • The proposed HT - 001 formulation and drug substance specifications are reasonable • No significant changes to the planned IND - enabling toxicology program • The proposed indication for HT - 001 across the entire class of EGFR inhibitors may be appropriate, pending appropriate data from phase 3 trials. • Detailed feedback for proposed IND - opening phase 2a study in patients receiving EGFR inhibitor therapy • Drug product formulation selected and confirmed skin penetration and retention, stability, and preliminary proof of concept data to support no change to efficacy from prior studies 8

 

 

www.hoththerapeutics.com N A S D A Q: HOTH R eferences 1. Eilers, R. E., Gandhi, M., Patel, J.D., Mulcahy, M.F., Agulnik, M., Hensing, T., Lacouture, M.E. (2009). Dermatologic Infections in Cancer Patients Treated With Epidermal Growth Factor Receptor Inhibitor Therapy. J Natl Cancer Inst 102, 47 – 53. 2. Lichtenberger, B.M., Gerber, P.A., Holcmann, M., Buhren, B.A., Amberg, N., Smolle, V., Schrumpf, H., Boelke, E., Ansari, P., Mackenzie, C., et al. (2013). Epidermal EGFR Controls Cutaneous Host Defense and Prevents Inflammation. Sci. Transl. Med. 5, 199ra111. 3. Boone, S. L., Rademaker, A., Liu, D., Pfeiffer, C., Mauro, D.J., Lacouture, M.E. (2007). Impact and Management of Skin Toxicity Associated with Anti - Epidermal Growth Factor Receptor Therapy: Survey Results. Oncology 72(3 - 4):152 - 9. 9

 

 

m o c . s c NA S D A Q: HOTH i t u e ap r e h t h t o h www. T HAN K Y O U Co n t act I n f orm a tion Investor Relations: LR Advisors Hoth Therapeutics, Inc. (678) 570 - 6791 investorrelations@hoththerapeutics.com Media Relations: Makovsky Miriam Brito, Assistant VP (914) 406 - 0435 hoth - mak@makovsky.com 10