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Purple Biotech to Present New Data On its Oncology Drug NT219 at AACR 2024

NT219 found to suppress cancer stem cells that promote drug resistance to KRASG12C and KRASG12D inhibitors and solid tumor recurrence

Potential biomarkers for treatment with NT219 detected in responding patients in Phase 1

REHOVOT, Israel, March 28, 2024 (GLOBE NEWSWIRE) --  Purple Biotech Ltd. ("Purple Biotech" or "the Company") (NASDAQ/TASE: PPBT), a clinical-stage company developing first-in-class therapies that harness the power of the tumor microenvironment to overcome tumor immune evasion and drug resistance, today announced it will present data for its oncology candidate NT219, a first-in-class small molecule, dual-inhibitor of IRS 1/2 and STAT3, in two poster presentations at the American Association for Cancer Research (AACR) annual meeting which takes place April 5-11, 2024, in San Diego, California.

“The growing body of clinical, biomarker, and preclinical data for NT219 demonstrate its potential not only in the lead indication of recurrent/metastatic squamous cell carcinoma of the head and neck, but also in other solid-tumor cancers. These publications at AACR 2024 are a result of the progress made last year both in clinical and preclinical work bringing out NT219’s attributes,” stated Gil Efron, Chief Executive Officer of Purple Biotech. “We look forward to leveraging these data as we move forward with the clinical evaluation of NT219.”

Dr Hadas Reuveni, VP Research and Development at Purple Biotech, added, “At AACR 2024 we will present new data related to NT219. We show for the first time the potential of NT219 to effectively suppress cancer stem cells (CSC), a critical cell population for tumor propagation, characterized by self-renewal and multipotency, and known to promote resistance and tumor recurrence. In addition, synergistic effect of NT219 and mKRAS inhibitors is demonstrated, suggesting a novel mechanism to combat resistance to both KRASG12Cand KRAS KRASG12D inhibitors in lung cancer and pancreatic cancers, respectively, both aggressive diseases with unmet medical need. In another presentation, we show the results of translational research in our Phase 1 study, suggesting activated IGF1R and STAT3 as potential biomarkers for the treatment with NT219. We will further evaluate these biomarkers in the next study.”

Poster Details:

Title: NT219, a dual inhibitor of IRS1/2 and STAT3, suppresses cancer stem cell mediated resistance to KRASG12C and KRASG12D inhibitors in solid tumors
Session Category: Experimental and Molecular Therapeutics
Session Title: Drug Resistance 2: Ras GTPase
Session Date and Time: Monday Apr 8, 2024, 9:00 AM - 12:30 PM PST
Published Abstract Number: 1939

Title: Early activity and biomarker evaluation of NT219 in combination with cetuximab in a Phase 1/2 study of recurrent/metastatic squamous cell carcinoma of the head and neck (R/M SCCHN)
Session Category: Clinical Research
Session Title: Predictive Biomarkers 4
Session Date and Time: Tuesday Apr 9, 2024, 9:00 AM - 12:30 PM PST
Published Abstract Number: 5181

The abstracts are available on the AACR Online Program Planner and were published in the online-only Proceedings supplement to the AACR journal Cancer Research. The presented posters will be available on the Publications section of Purple Biotech’s website, following their presentations at the conference.

About Purple Biotech

Purple Biotech Ltd. (NASDAQ/TASE: PPBT) is a clinical-stage company developing first-in-class therapies that seek to overcome tumor immune evasion and drug resistance. The Company’s oncology pipeline includes NT219, CM24 and IM1240. NT219 is a dual inhibitor, novel small molecule that simultaneously targets IRS1/2 and STAT3. A Phase 1 dose escalation study is being concluded and a phase 2 study of NT219 at its recommended Phase 2 level in combination with cetuximab in patients with recurrent and/or metastatic squamous cell carcinoma of the head and neck cancer (SCCHN) is planned. CM24 is a humanized monoclonal antibody that blocks CEACAM1, an immune checkpoint protein that supports tumor immune evasion and survival through multiple pathways. The Company is advancing CM24 as a combination therapy with anti-PD-1 checkpoint inhibitors in a Phase 2 study for the treatment of pancreatic ductal adenocarcinoma (PDAC). The Company has entered into a clinical collaboration agreement with Bristol Myers Squibb for the Phase 2 clinical trials to evaluate the combination of CM24 with the PD-1 inhibitor nivolumab in addition to chemotherapy. The Company is advancing a preclinical platform of conditionally-activated tri-specific antibodies that engage both T cells and NK cells to induce a strong, localized immune response within the tumor microenvironment. The cleavable capping technology confines the compound’s therapeutic activity to the local tumor microenvironment, and thereby potentially increases the anticipated therapeutic window in patients. The third arm of the antibody specifically targets the Tumor Associated Antigen (TAA). The technology presents a novel mechanism of action by unleashing both innate and adaptive immune systems to mount an optimal anti-tumor immune response. IM1240 is the platform’s lead tribody in development that targets 5T4 expressed in a variety of solid tumors and is correlated with advanced disease, increased invasiveness and poor clinical outcomes. The Company’s corporate headquarters are located in Rehovot, Israel. For more information, please visit https://purple-biotech.com/.

Forward-Looking Statements and Safe Harbor Statement

Certain statements in this press release 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 or by the fact that these statements do not relate strictly to historical matters. 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 NT219, CM24 and IM1240; the process by which such early stage therapeutic candidates 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 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 obtained 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; the impact of the economic, public health, political and security situation in Israel, the U.S. and other countries in which we may operate or obtain approvals for our products or our business, and other factors that are discussed in our Annual Report on Form 20-F for the year ended December 31, 2023 and in our other filings with the U.S. Securities and Exchange Commission (“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 press release 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, https://www.sec.gov.

CONTACTS:

Company Contact:
Lior Fhima
Chief Financial Officer
IR@purple-biotech.com


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