Purple Biotech Ltd 6-K, filed Nov 16, 2021
Purple Biotech Ltd. (PPBT)
About this 6-K
Purple Biotech Ltd filed this 6-K on November 16, 2021.
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 6-K
Report of Foreign Private Issuer
Pursuant to Rule 13a-16 or 15d-16
of the Securities Exchange Act of 1934
For the month of November 2021
Commission File Number: 001-37643
PURPLE BIOTECH LTD.
(Translation of registrant’s name into English)
4 Oppenheimer Street, Science Park, Rehovot 7670104, Israel
(Address of principal executive offices)
Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.
Form 20-F ☒ Form 40-F ☐
Indicate by check mark if the Registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ☐
Indicate by check mark if the Registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): ☐
The Company is announcing that it has made available an updated Company Presentation on its website. A copy of the updated Company Presentation is attached hereto as Exhibit 99.1 and may be viewed at the Company’s website at www.purple-biotech.com.
Exhibit
| 99.1 | Company Presentation |
Incorporation by Reference
This Form 6-K, including all exhibits attached hereto, is hereby incorporated by reference into each of the Registrant’s Registration Statement on Form S-8 filed with the Securities and Exchange Commission on May 20, 2016 (Registration file number 333-211478), the Registrant’s Registration Statement on Form S-8 filed with the Securities and Exchange Commission on June 6, 2017 (Registration file number 333-218538), the Registrant’s Registration Statement on Form F-3, as amended, originally filed with the Securities and Exchange Commission on July 16, 2018 (Registration file number 333-226195), the Registrant’s Registration Statement on Form S-8 filed with the Securities and Exchange Commission on March 28, 2019 (Registration file number 333-230584), the Registrant’s Registration Statement on Form F-3 filed with the Securities and Exchange Commission on September 16, 2019 (Registration file number 333-233795), the Registrant’s Registration Statement on Form F-3 filed with the Securities and Exchange Commission on December 2, 2019 (Registration file number 333-235327), the Registrant’s Registration Statement on Form F-3 filed with the Securities and Exchange Commission on May 13, 2020 (Registration file number 333- 238229), the Registrant’s Registration Statement on Form S-8 filed with the Securities and Exchange Commission on May 28, 2020 (Registration file number 333-238481) and each of the Registrant’s Registration Statements on Form F-3 filed with the Securities and Exchange Commission on July 10, 2020 (Registration file numbers 333-239807 and 333-233793), to be a part thereof from the date on which this report is submitted, to the extent not superseded by documents or reports subsequently filed or furnished.
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, thereunto duly authorized.
| November 16, 2021 | PURPLE BIOTECH LTD. | |
| By: | /s/ Isaac Israel | |
| Isaac Israel | ||
| Chief Executive Officer | ||
2
Exhibit 99.1
NASDAQ/TASE: PPBT November 2021 CORPORATE PRESENTATION
2 Forward - looking Statements and Safe Harbor Certain statements in this presentation that are forward - looking and not statements of historical fact are forward - looking statements within the meaning of the safe harbor provisions of the Private Securities Litigation Reform Act of 1995 . Such forward - looking statements include, but are not limited to, statements that are not statements of historical fact, and may be identified by words such as “believe”, “expect”, “intend”, “plan”, “may”, “should”, “could”, “might”, “seek”, “target”, “will”, “project”, “forecast”, “continue” or “anticipate” or their negatives or variations of these words or other comparable words . You should not place undue reliance on these forward - looking statements, which are not guarantees of future performance . Forward - looking statements reflect our current views, expectations, beliefs or intentions with respect to future events, and are subject to a number of assumptions, involve known and unknown risks, many of which are beyond our control, as well as uncertainties and other factors that may cause our actual results, performance or achievements to be significantly different from any future results, performance or achievements expressed or implied by the forward - looking statements . Important factors that could cause or contribute to such differences include, among others, risks relating to : the plans, strategies and objectives of management for future operations ; product development for NT 219 and CM 24 ; the process by which early stage therapeutic candidates such as NT 219 and CM 24 could potentially lead to an approved drug product is long and subject to highly significant risks, particularly with respect to a joint development collaboration ; the fact that drug development and commercialization involves a lengthy and expensive process with uncertain outcomes ; our ability to successfully develop and commercialize our pharmaceutical products ; the expense, length, progress and results of any clinical trials ; the lack of sufficient funding to finance the clinical trials ; the impact of any changes in regulation and legislation that could affect the pharmaceutical industry ; the difficulty in receiving the regulatory approvals necessary in order to commercialize our products ; the difficulty of predicting actions of the U . S . Food and Drug Administration or any other applicable regulator of pharmaceutical products ; the regulatory environment and changes in the health policies and regimes in the countries in which we operate ; the uncertainty surrounding the actual market reception to our pharmaceutical products once cleared for marketing in a particular market ; the introduction of competing products ; patents attained by competitors ; dependence on the effectiveness of our patents and other protections for innovative products ; our ability to obtain, maintain and defend issued patents ; the commencement of any patent interference or infringement action against our patents, and our ability to prevail, obtain a favorable decision or recover damages in any such action ; and the exposure to litigation, including patent litigation, and/or regulatory actions, and other factors that are discussed in our in our Annual Report on Form 20 - F for the year ended December 31 , 2020 and in our other filings with the U . S . Securities and Exchange Commission (the “SEC”), including our cautionary discussion of risks and uncertainties under “Risk Factors” in our Registration Statements and Annual Reports . These are factors that we believe could cause our actual results to differ materially from expected results . Other factors besides those we have listed could also adversely affect us . Any forward - looking statement in this presentation speaks only as of the date which it is made . We disclaim any intention or obligation to publicly update or revise any forward - looking statement, or other information contained herein, whether as a result of new information, future events or otherwise, except as required by applicable law . You are advised, however, to consult any additional disclosures we make in our reports to the SEC, which are available on the SEC’s website, http : //www . sec . gov .
3 Business Highlights Strong balance sheet and cash position Purple Biotech (NASDAQ/TASE: PPBT) CM24 - First - in - class α - CEACAM1 mAb , validating clinical collaboration with Bristol Myers Squibb NT219 - First - in - class, small molecule, dual inhibitor of IRS 1/2 and STAT3 $50.5M cash as of September 30 th , 2021 Cash runway into 2024 ADSs outstanding: 17.7M Multiple data read - outs expected in the next 12 months
4 Advancing Clinical - stage Novel Oncology Therapies Program Indication Preclinical Phase 1 Phase 2 Phase 3 Partner Value Drivers CM24 (CEACAM - 1) S olid tumors (monotherapy) (Completed) Expansion arms on RP2D: Initiation Q4:21 Topline data: H2:21 S olid tumors (combination with nivolumab) NSCLC (combination with nivolumab) Pancreatic Cancer (combination with nivolumab and nab - paclitaxale ) NT219 (IRS1/2 & STAT3) Solid tumors (monotherapy) Expansion arms on RP 2 D: Initiation Q 1:22 Topline data: H 1:22 R/M SCCHN & CRC (dose escalation with cetuximab) ; R/M SCCHN (expansion - combination with cetuximab on RP2D) Done / Ongoing Planned study Done / Ongoing Expansion
5 Experienced Leadership Isaac Israel Chief Executive Officer Former CEO of BeeContact Ltd. (TASE:BCNT). NextGen Biomed (TASE: NXGN) Eric K. Rowinsky , MD Chairman of the Board Former CMO at ImClone, Stemline , Board member at Biogen Inc. Gil Efron President and Chief Financial Officer Former Deputy CEO & CFO at Kamada (NASDAQ:KMDA) Hadas Reuveni , Ph.D Vice President, R&D Formerly at Keryx (NASDAQ:KERX) Bertrand Liang, MD, Ph.D , MBA/AMP, FAAN Chief Medical Officer Formerly at Biogen Idec, Amgen, NCI Michael Schickler , Ph.D Head of Clinical & Regulatory Affairs Formerly at Hoffmann - La Roche, CEO at CureTech
Advancing First - in - Class Oncology Therapies CM24 - an α - CEACAM1 mAb
7 CEACAM 1 Ύ Plays a Key Role in Cancer Biology 01 | ADHESION Horst, 2011 “ CEACAM1 creates a pro - angiogenic tumor microenvironment that supports tumor vessel maturation ” “ Neutrophil extracellular trap - associated CEACAM1 as a putative therapeutic target to prevent metastatic progression of colon carcinoma ” Ferri , 2020 Tsuzuki, 2020 Tsang, 2020 Blumberg, 2015 “C EACAM1 regulates TIM - 3 - mediated tolerance and exhaustion ” “ CEACAM 1 regulates Fas - mediated apoptosis in Jurkat T - cells via its interaction with β - catenin ” Shively, 2013 02 | IMMUNE CELLS/ IMMUNE EXCLUSION 03 | IMMUNO - ONCOLOGY “ Immune - checkpoint molecules on regulatory T - cells as a potential therapeutic target in head and neck squamous cell cancers ” “[Blockade] enhances natural killer cell cytotoxicity against tumor cells through blockade of the inhibitory CEACAM1 / CEACAM5 immune checkpoint pathway ” *Carcinoembryonic Antigen Cell Adhesion Molecule
8 CM24 MOA | Immuno - oncology Markel et al, J Immunol 2002 , 2006 ; Immunology, 2008 ; Cancer Immunol Immunother 2010 ; Ortenberg et al, Mol Cancer Ther 2012 ; Zhou, 2009 ; Li, 2013 ; Huang, 2015 ; Acharya N, et al. J Immunotherapy Canc 8 :e 911 - 22 , 2020 . Tumor CD8+T & NK Cells CEACAM 1 CEACAM1 CEACAM 1 CEACAM5 Activation enhanced cytotoxic activity & cytokine production Tumor cell or pAPC T cell TCR Signaling TIM 3 MHC TCR CD4/8 CD45/148 CEACAM 1 CEACAM1 Gal - 9 PtdSer
9 CM 24 MOA | Adhesion Neutrophil extracellular trap - associated CEACAM1 as a putative therapeutic target to prevent metastatic progression: CEACAM1 creates a pro - angiogenic tumor microenvironment that supports tumor vessel maturation. CM24 is proposed to attenuate/block tumor growth and metastatic processes. Rayes RF, et al. Neutrophil Extracellular Trap - Associated CEACAM 1 as a Putative Therapeutic Target to Prevent Metastatic Progression of Colon Carcinoma. J Immunol. 2020 ; Gerstel, D. et al. CEACAM 1 creates a pro - angiogenic tumor microenvironment that supports tumor vessel maturation. Oncogene 30 , 4275 – 4288 ( 2011 ) Primary Tumor Metastasizing CM24 Metastatic Tumor
10 Significant benefits as both single agent and in combination with α - PD - 1 Anti - cancer Effect Following Treatment Preclinical Data With CM24 + TIL and CM24 + α - PD1 • Xenograft, lung lesion, Mel 526 (IV) • Tumor burden was monitored 26 days post last CM24 treatment TIL + IgG TIL + CM 24 Naïve Combination index ( CI) = 0.15 < 1 64; synergy
11 • Open - label, multi - dose escalation monotherapy study to assess safety and tolerability • Heavily pre - treated patients with a median of 4 prior regimens (range 2 - 8 ) Overall, treatment was well tolerated • Most of the responding patients were treated with the highest dose levels of 3 mg/kg & 10 mg/kg • PK analysis revealed non - linearity, modeling recommended to continue administration of higher doses to reach saturation CM24 Phase 1 Monotherapy Trial No DLTs up to 10 mg/kg No discontinuation of study drug due to an AE No drug related mortalities 33.3 % SD (RECIST) *24 patients evaluated # pts 27 patients: Colorectal 11 Melanoma 7 Ovarian 4 Gastric 3 NSCLC 2 0.01mg/kg ϭ 0.03 mg/kg ϭ 0.1 mg/kg ϯ 0.3 mg/kg ϯ 1.0 mg/kg ϯ 3.0 mg/kg ϵ 10.0 mg/kg ϳ Q 2 wks x 20 6 - week observation q2wks X 4
12 PK/PD Modeling Provides Dosage & Schedule Guidance Simulated TMDD 1 saturation at Ctrough with Q 2 W regimen • Consistent with observed PK showing high clearance at doses < 10 mg/kg, plot shows low TMDD saturation at low doses • 10 mg/kg has a broad range of saturation, and > 10 mg/kg, Q 2 W dose is needed for saturation across population • Nivolumab administered Q 2 W or Q 4 W, representing good clinical and commercial fit for CM 24 1 Target - mediated drug disposition. 2 OPDIVO® is a registered trademark of Bristol - Myers Squibb. Ctrough is the drug concentration reached by CM 24 before the next dose is administered Phase 1 b/ 2 a study will continue escalating the CM 24 dose above 10 mg/kg q 2 wk, in combination with nivolumab
13 13 Large Market Opportunity in NSCLC & Pancreatic Cancer • CEACAM 1 expression correlates with poor prognosis in NSCLC and Pancreatic cancer 1 • Preclinical data support significant synergy • Receptor saturation with CM 24 is better achieved with a Q 2 W regimen, aligning with the nivolumab regimen • NSCLC accounts for ~ 200 K new cases/year in the US; with a 5 - year relative survival rate of 23 % 2 • Immunotherapy is now recommended as first line therapy in all patients with NSCLC and no driver mutations 3 • 5 - year overall survival rates with chemotherapy in 2 L is 2.6 % and with I/O Opdivo ® is 13.4 % 4 • Pancreatic Cancer accounts for ~ 60 K new cases/year in the US; with a 5 - year relative survival rate of 10 % 2 • I/O approaches have been limited to patients with high microsatellite instability (MSI - H) or high tumor mutational burden (TMB - H) • 5 - year overall survival rates with chemotherapy in 2 L is 3 % 2 Combining nivolumab with CM 24 in a clinical collaboration with 1 Dango et al, Lung Cancer 2008 ; 60:426 & Calinescu et al, Journal of Immunology Research 2018 : 7169081 . 2 American Cancer Society, Cancer Facts & Figures 2019 , and the ACS website, https://seer.cancer.gov/statfacts/html/pancreas.html 3 Economopoulou P, Mountzios G. The emerging treatment landscape of advanced non - small cell lung cancer. Ann Transl Med. 2018 ; 6 ( 8 ): 138 . doi: 10.21037 /atm. 2017.11.07 4 Gettinger S, et al "Five - year outcomes from the randomized, phase III trials CheckMate 017 / 057 : Nivolumab vs docetaxel in previously treated NSCLC" WCLC 2019 ; Abstract OA 14.04 .
14 CM 24 Phase 1 / 2 Combination Study Design (NCT 04731467 ) A Phase 1 / 2 open label multi center study of CM 24 in combination with: • Nivolumab in selected cancer indications (Phase 1 ) and NSCLC (Phase 2 ) • Nivolumab and nab - paclitaxel in pancreatic cancer (Phase 2 ) Primary endpoints: Phase 1 : Evaluate the safety, PK and the MTD/RP 2 dose Phase 2 : Evaluate preliminary efficacy in 2 nd line NSCLC and pancreatic cancer Measurement of CEACAM 1 based bio - marker. Exploring further studies in other tumor types as well as monotherapy 2021 2022 2023 - 24 Doses: 10, 15, 20mg/kg q2wk + nivolumab (480mg q4w) 3+3 design 9 ≤ n ≤ 15 Indications: NSCLC, Pancreatic, Ovarian, CRC, Melanoma, Papillary Thyroid Carcinoma Dose Escalation Expansions CM 24 (@RP 2 dose) + nivolumab ( 480 mg) q 4 w I/O refractory NSCLC; 2 nd line n= 13 + 14 (Simon 2 Stage Design) CM 24 (@RP 2 dose) + nivolumab ( 480 mg) q 4 w + nab - paclitaxel Locally advanced, unresectable pancreatic cancer; 2 nd line n= 13 + 14 (Simon 2 Stage Design) Clinical collaboration with:
15 1 st Cohort Analysis – SAFETY and RESPONSE ϭϬ mg/kg Dose Level in combination with nivolumab • The administration of CM 24 at 10 mg/ kg q 2 wks in combination with nivolumab at 480 mg q 4 wks was well tolerated with no SAEs in patients with refractory PDAC • Three patients were enrolled into the first dose cohort, all with PDAC. Two patients progressed after 1.5 and 2 months of treatment • The third patient, previously treated with FOLFIRINOX and gemcitabine/nab - paclitaxel, had a germline NF 1 VUS, with MSI - S and PDL - 1 IHC 2 + and 5 % staining • After initial treatment, the patient had a Partial Response of 40 %, with a definite reduction of the para - tracheal adenopathy and liver lesions and 56 % reduction in CA 19 - 9 levels 655 681 283 SCREENING FIRST VISIT - PREDOSE 2 MONTH VISIT - PREDOSE CA - 19 - 9 Para - tracheal adenopathy Baseline Scan 8 - week Scan Liver lesion Baseline Scan 8 - week Scan
Advancing First - in - Class Oncology Therapies NT 219 – A Small Molecule Dual Inhibitor of IRS 1 / 2 and STAT 3
17 NT 219 - Dual Inhibitor of IRS 1 / 2 & STAT 3 NT 219 IRS 1 / 2 • Scaffold proteins, mediating mitogenic, metastatic, angiogenic and anti - apoptotic signals from IGF 1 R, IR, IL 4 R and other oncogenes, overexpressed in multiple tumor types • Regulates major survival pathways such as the PI 3 K/AKT, MEK/ERK and WNT/ β - catenin • Activated as a feedback response to anti - cancer therapies STAT 3 • Well - established transcription factor associated with the tumorigenic phenotype • Provides a crucial axis to support cell proliferation and survival • Active in tumor JAK/STAT 3 and TGF - β resistance mechanisms 1 Hadas Reuveni et al.; Cancer Res 2013 ; 73:4383 - 4394 . 2013 , 2 Machado - Neto, et al. Clinics (Sao Paulo, Brazil) vol. 73 ,suppl 1 e 566 s. 11 Oct. 2018 , doi: 10.6061 /clinics/ 2018 /e 566 s 3 Naokazu Ibuki 1,2 , Mazyar Ghaffari 1,3 , Hadas Reuveni 4 et al. DOI: 10.1158 / 1535 - 7163 .MCT - 13 - 0842 Published December 2014 ; 4 Rampias T, Favicchio R, Stebbing J, Giamas G. 2016 May 19 ; 35 ( 20 ): 2562 - 4 . doi: 10.1038 /onc. 2015.392 . Epub 2015 Oct 19 . PMID: 26477311 5 Flashner - Abramsonet al.. Oncogene. 2016 May 19 ; 35 ( 20 ): 2675 - 80 . doi: 10.1038 /onc. 2015.229 . Epub 2015 Jun 29 . PMID: 26119932 , 6 Sanchez - Lopez E,. Oncogene. 2016 May 19 ; 35 ( 20 ): 2634 - 44 . doi: 10.1038 /onc. 2015.326 . Epub 2015 Sep 14 . PMID: 26364612 ; PMCID: PMC 4791217 . 7 Zhao C, et al. Trends Pharmacol Sci. 2016 Jan; 37 ( 1 ): 47 - 61 . doi: 10.1016 /j.tips. 2015.10.001 . Epub 2015 Nov 12 . PMID: 26576830 , 8 Johnson, Daniel E et al. “ Targeting the IL - 6 /JAK/STAT 3 signaling axis in cancer. ” Nature reviews. Clinical oncology vol. 15,4 ( 2018 ): 234 - 248 . doi: 10.1038 /nrclinonc. 2018.8
18 Novel MOA: IRS Degradation By NT 219 Blocking IGF 1 R - AKT Pathway 1 Binding to IRS 1 1 Reuveni et al. Cancer Res 2013 Ser - phosphorylation 2 Degradation 3 Covalent binding to IRS 1 / 2 leads to the dissociation of IRS 1 / 2 from IGF 1 R Serine phosphorylation prevents re - binding of IRS 1 / 2 to the receptor SURVIVAL APOPTOSIS IRS 1 / 2 is degraded by the proteasome IGF 1 IGF 1 R IRS AKT PI 3 K IGF 1 IGF 1 R IRS NT AKT IGF 1 IGF 1 R IRS pS pS AKT IGF 1 IGF 1 R AKT
19 NT 219 Efficacy as Monotherapy Animal model Head & Neck Cancer (SCC - 9 ) NSG Ρ , PBMCs - injected 1 Drugs α - PD 1 Cetuximab (Erbitux®) NT 219 20 mg/kg NT 219 60 mg/kg 1 NSG mice were injected SC with SCC - 9 cells. PBMCs ( 18 * 10 6 cells per mouse) administered 4 weeks prior to first treatment. NT 219 , α - PD 1 , and cetuximab were administered IV (NT 219 ) and IP ( α - PD 1 and cetuximab) twice a week for 4 weeks. Graph reflects relevant data adapted from 2020 Multidisciplinary Head and Neck Cancers Symposium Poster presentation
20 By blocking both STAT 3 and IRS pathways, NT 219 prevents tumor resistance and re - sensitizes tumors to anti - cancer therapies STAT 3 and IRS are Essential in Therapeutic Resistance STAT 3 IRS EGFR MEK Tumor Regression ERK PI 3 K AKT Tumor Survival Tumor Survival Buparlisib Ruxolitinib Erlotinib Blocking survival pathways NT 219 NT 219 STAT 3 IRS ONCOPROTEIN DRUG MEK / ERK TUMOR REGRESSION Proof of Concept: PDX model of Head and Neck Cancer Erlotinib+Ruxolitinib (n= 6 ) Erlotinib+Buparlisib (n= 6 ) Control (n= 6 ) Erlotinib (n= 8 ) Erlotinib+NT 219 (n= 6 ) Erlotinib+Ruxolitinib+Buparlisib (n= 8 )
21 NT 219 + Targeted Therapies Established Efficacy in PDX Models NSCLC Exon 19 deletion EGFR and T 790 M, biopsy of bone marrow metastasis, patient previously progressed on afatinib and osimertinib R/M SCCHN metastasis, patient previously progressed on chemoradiation, several chemotherapies, and pembrolizumab Treatments on days 0 , 3 and 10 , cetuximab - 1 mg/mouse, 3 mice/group; PBMCs ( 1.4 M cells/mouse) were injected on day 6 Osimertinib 5 mg/kg, NT 219 65 mg/kg, mean tumor volume at the end point, 3 mice/group; 0 500 1,000 1,500 2,000 Control NT219 Osimertinib Osimertinib+NT219 Tumor Volume (mm 3 ) * ** ** * Tumor Volume (mm 3 ) ** p< 0.01 , * p< 0.02 based on one - way ANOVA with post hoc Tukey ’ s HSD test Control NT 219 Cetuximab Cetuximab+NT 219
22 NT 219 + α - PD 1 Re - sensitizes to Refractory α - PD 1 Tumors PDX Model Humanized PDX of Esophagus Cancer (refractory to pembrolizumab) Drug Pembrolizumab (Keytruda®) * Double autologous model - Tumors & PBMCs are from the same patient (#RA 236 ) | Keytruda - 6 mg/kg IP, NT 219 - 60 mg/kg IV 0 200 400 600 800 1000 1200 0 5 10 15 20 Tumor volume (mm 3 ) Days following treatment initiation Control (n=3) NT219 (n=3) Keytruda (n=3) Keytruda + NT219 (n=3) Autologous PBMCs ( 2.1 M/mouse)
23 23 First Market Opportunity Recurrent or Metastatic Squamous Cell Carcinoma of Head and Neck (SCCHN) Global Data 2018 : Head and Neck Squamous Cell Carcinoma: Opportunity Analysis and Forecasts to 2026 ; Internal best current estimates of patient numbers based on external research, 5 major global territories Rationale for combining Cetuximab + NT 219 • EGFR and PD(L) - 1 are the only clinically validated targets in SCCHN • < 15 % of R/M SCCHN patients respond to Cetuximab • Cetuximab inhibits EGFR signaling and promotes ADCC in EGFR expressing tumors • STAT 3 and IRS - to - AKT activation contributes to resistance to cetuximab in SCCHN Targeting the unmet medical need • 1 L Standard of care has shifted from chemotherapy towards immuno - oncology + chemotherapy • < 20 % of R/M SCCHN patients respond to α - PD 1 s • 175 k new cases/year are expected by 2024 α - PD - 1 + Chemo 1 L 60 K pts Cetuximab 2 L 37 K pts NT 219 NT 219 + Cetuximab has the potential to become an attractive 2 nd line therapy
24 NT 219 Monotherapy and Combination Phase 1 / 2 Study Design ( NCT 04474470 ) Study title A phase 1 / 2 study with open - label, dose escalation phase followed by single - arm expansion to assess the safety, tolerability, PK, PD and efficacy of NT 219 , alone in adults with recurrent or metastatic solid tumors and in combination with Erbitux® (cetuximab) in head and neck cancer Endpoints Primary endpoints: Safety, pharmacokinetics and to determine the MTD Secondary endpoints: Obtain preliminary efficacy data 1 Colorectal Adenocarcinoma pts will be recruited in the Dose Escalation phase Indication TBD (expansion not part of the study protocol) 2021 2022 2023 Dose Escalation NT 219 q 1 w 15 ≤ n ≤ 24 Expansion NT 219 q 1 w @ RP 2 D n= 11 + 18 (Simon 2 stage design) Dose Escalation NT 219 q 1 w + cetuximab q 1 w 12 ≤ n ≤ 24 NT 219 + cetuximab in subjects with R/M head and neck cancer 1 Expansion NT 219 q 1 w + cetuximab q 1 w n= 11 + 18 (Simon 2 stage design) NT 219 as a single agent in subjects with R/R solid tumors Dose Escalation Design Study Design
25 Cancer Type Prior Lines of Therapy Treatment Duration(Weeks) Best Response* NT219 3mg/kg Pancreatic Cancer 3 8 PD GE Junction Cancer 4 22 PR Target lesion: Absent Non target lesion 1: Absent Non target lesion 2: Stable Breast Cancer 11 8 PD Interim Analysis – SAFETY and RESPONSE 3 mg/kg Dose Level as a Single Agent Response Analysis *Interim data • NT 219 has been found to be well - tolerated with minimal adverse events • In a patient with refractory GE junction disease, NT 219 administration was associated with a partial response (PR): x Complete remission at the largest target lesion and one non - target central mesenteric lymph node x Stable Disease at the other non - target lesion pre - carinal lymph node
26 Business Highlights Strong balance sheet and cash position Purple Biotech (NASDAQ/TASE: PPBT) CM 24 - First - in - class α - CEACAM 1 mAb , validating clinical collaboration with Bristol Myers Squibb NT 219 - First - in - class, small molecule, dual inhibitor of IRS 1 / 2 and STAT 3 $ 50.5 M cash as of September 30 th , 2021 Cash runway into 2024 ADSs outstanding: 17.7 M Multiple data read - outs expected in the next 12 months
27 We are committed to providing cancer patients with first - in - class therapies to OVERCOME tumor drug resistance, ENHANCE treatment response and SLOW tumor progression
THANK YOU Contact Us: ir@purple - biotech.com
Appendix A - CM 24
30 CM 24 activity is Demonstrated as Single Agent and in Combination with TILS Inhibition of Melanoma Growth Following CM24 and CM24 + TIL Treatment * P< 0.05 TGI 71 % * P< 0.05 TGI 45 %
31 PHASE 1 PK DATA Target saturation was not reached with doses up to 10 mg/kg Slower clearance with increasing dose Higher half - life with increasing dose 0.1 mg/ kg 0.3 mg/ kg 1 mg/ kg 3 mg/ kg 10 mg/ kg Predictions with Q 3 W regimen • Modeling with increased interval between doses demonstrates lower TMDD at 10 mg/kg dose • With Q 3 W, 20 mg/kg dosing is not sufficient for saturation across population
Appendix B - NT 219
33 Selected Publications Menashe Bar - Eli Michael Karin Michael Cox Alexander Levitzki
34 AACR Annual Meeting, April 2021 , AACR Virtual Special Conference on Epigenetics and Metabolism, Oct 2020 , Ido Wolf, MD, Head of Oncology Division, Tel Aviv Sourasky Medical Center Colon cancer LS - 513 cells overexpressing IRS 2 demonstrate enhanced b - catenin activity. Targeted inhibition of IRS 2 by NT 219 or IRS 2 - SH RNA, suppresses the increased b - catenin activity and inhibit LS - 513 cell viability. Combination of 5 - FU and NT 219 significantly inhibited the growth of CRC tumors in brain , using intracranial model and extended mice survival. Active β - Catenin IRS 2 β - actin NT 219 + - NT 219 concentrations ( m M) CRC Cell Viability ( 72 hr) IRS 2 NT 219 downregulates IRS 2 and suppresses the b - catenin activity Silencing IRS 2 inhibits b - catenin activity NT 219 | Suppresses β - Catenin activity in CRC Cells and Inhibited CRC Brain Metastasis 5 - FU NT 219 + 5 Ͳ FU In Vitro In Vivo
35 PDX model Pancreatic Cancer Drug Gemcitabine ( Gemzar ® ) NT 219 | Pancreatic Cancer in Combination with Gemcitabine Highly effective anti cancer activity exhibited by NT 219 in combination with Gemcitabine
36 PDX model Pancreatic Cancer Drug Gemcitabine ( Gemzar ®) RNA Sequencing | Analysis of Tumors Following Treatment Reduced expression of IRS 1 , Ki 67 , FOXM 1 & TGFb is exhibited by pancreatic cancer treated with NT 219 alone and in combination with gemcitabine
37 Demographics of Patients treated with NT 219 3 mg/kg (n= 3 ) Median age (range) 74 (69 - 79) Male/Female, n (%) 2(66.6%)/1(33.3%) Race White n (%) 3 (100%) Prior Lines of Therapy 3 n (%) 1 (33.3%) 4, n (%) 1 (33.3%) 11, n (%) 1 (33.3%) Diagnosis, n Pancreatic Cancer 1 Gastroesophageal Junction Cancer 1 Breast Cancer 1 ECOG, n (%) 1 3 (100%) Median time from initial Diagnosis, Months (range) ϲϮ ( 22 - 90 ) NT 219 – DEMOGRAPHICS & SAFETY 3 mg/kg Dose Level as a Single Agent Adverse Event Description Grade 1 n (#Events) Grade 2 n (#Events) Grade 3 n (#Events) Abdominal Pain 1(2) 1(1) Alanine Aminotransferase Increased 1(1) Alkaline Phosphatase Increased 1(1)* Aspartate Aminotransferase Increased 1(1) Back Pain 1(1) Belching 2(2) Cellulitis Left Foot 1(1) Dyspnea 2(2) Fatigue 1(1) Nausea 1(1) 1(1) Rash Pustular 1(1) Retching 1(2) Toxic Encephalopathy 1(1)** Patients Demographics *Transient - G 2 after 2 weeks, **Transient - less than 24 h Summary of Adverse Events Presented at the ASCO annual meeting June 2021