CM-24

▎药明康德内容团队报道 12月2日，Purple Biotech公司公布了其抗肿瘤在研药物CM24的随机2期临床研究结果。CM24是一种靶向CEACAM1的单克隆抗体，旨在开发治疗胰腺导管腺癌（PDAC）患者。研究表明，CM24联合PD-1抑制剂治疗组在所有疗效终点上都有明显和持续的改善。此外，对于生物标志物（血清CEACAM1预处理范围）丰富的患者，治疗组比对照组显著改善，死亡风险降低79%，中位OS提高5.1个月，疾病进展或死亡风险降低90%以上，中位PFS改善2.9个月，ORR相比对照组显著改善（50% vs 0%），DCR为100（vs 0%）。 Purple Biotech是一家临床阶段生物医药公司，旨在开发创新疗法以克服肿瘤免疫逃逸和耐药性。该公司此前已与百时美施贵宝签订临床合作协议，以在2期临床研究中评估CM24与PD-1抑制剂纳武利尤单抗联合化疗这一治疗方案。 CM24是一种人源化单克隆抗体，可阻断CEACAM1。CEACAM1是NETs上的主要蛋白之一。NET是一种网状DNA结构，覆盖着由活化的中性粒细胞释放的致癌蛋白，已被证明可包裹肿瘤并促进免疫逃避、肿瘤进展和转移。当CEACAM1与NET结合时，它将成为癌症细胞粘附的重要位点，因此被认为是预防肿瘤转移进展和免疫逃逸的潜在治疗靶点。 本次公布的这项2期研究旨在评估CM24与纳武利尤单抗联合标准护理化疗（SoC），相比于单独的SoC化疗二线治疗转移性PDAC患者的疗效。研究的主要终点是总生存期（OS），次要终点包括无进展生存期（PFS）、客观缓解率（ORR）和疾病控制率（DCR）。该研究共有63名患者入组，来自美国、西班牙和以色列的18个研究中心，分为2个平行独立的随机研究队列（每个队列共2组）。 该研究的亚组分析显示，患者预处理血清CEACAM1范围在6000~15000pg/mL之间时，结果有统计学意义，中位OS提高5.1个月，中位PFS改善2.9个月，DCR为100（vs 0%），具体结果如下： 该研究还评估了CA19-9以及其他探索性生物标志物。CA19-9是一种临床验证的PDAC生物标志物，在试验组中观察到CA19-9的持续下降，从基线下降的中位数百分比约为80%，而对照组则增加了40%。 研究人员认为，基于患者预处理活检的其他生物标志物分析显示，在高肿瘤CEACAM1（≥100）和低联合阳性评分（CPS）（≤1）的患者中，显著的OS和PFS获益支持CM24/纳武利尤单抗联合治疗进行进一步研究。此外，CEACAM1或NETs水平极高可能表明患者对治疗有潜在的耐药性，说明CM24/纳武利尤单抗联合疗法可能为不符合抗PD-1治疗的患者提供新的机会。Purple Biotech公司目前正在计划进行一项2b期研究，比较CM24联合PD-1抑制剂或CM24单药治疗在NET和CEACAM1表达的多种肿瘤类型中的作用。 参考资料： [1] Purple Biotech Reports Positive Final Results from Randomized Phase 2 Study of CM24 in Second Line Pancreatic Cancer. Retrieved Dec 02, 2024, from https://www.globenewswire.com/news-release/2024/12/02/2989659/0/en/Purple-Biotech-Reports-Positive-Final-Results-from-Randomized-Phase-2-Study-of-CM24-in-Second-Line-Pancreatic-Cancer.html 本文由药明康德内容团队根据公开资料整理编辑，欢迎个人转发至朋友圈。转发授权及其他合作需求，请联系wuxi_media@wuxiapptec.com。 免责声明：药明康德内容团队专注介绍全球生物医药健康研究进展。本文仅作信息交流之目的，文中观点不代表药明康德立场，亦不代表药明康德支持或反对文中观点。本文也不是治疗方案推荐。如需获得治疗方案指导，请前往正规医院就诊。

New data suggests that baseline serum myeloperoxidase (MPO) levels below the threshold may predict overall survival (OS) improvement when comparing the CM24+nivolumab+Nal-IRI/5FU/LV vs. Nal-IRI/5FU/LV arms Data reported at the 2024 ASCO annual meeting demonstrated reduced risk of death and cancer progression, prolongation of OS and progression free survival (PFS) as well as higher objective response rate (ORR) and disease control rate (DCR) and decreasing CA19-9 levels in the CM24+Nivolumab+Nal-IRI/5FU/LV arm Further data and top line results are expected in the second half of 2024 Company to host virtual key opinion leader (KOL) event to discuss results on July 11, 2024 REHOVOT, Israel, June 27, 2024 (GLOBE NEWSWIRE) -- Purple Biotech Ltd. (“Purple Biotech” or “the Company”) (NASDAQ/TASE: PPBT), a clinical-stage company developing first-in-class oncology therapies that overcome tumor immune evasion and drug resistance, today reported additional positive interim data from its randomized, controlled, open label, multicenter Phase 2 study (NCT 04731467) of CM24, in combination with Bristol Myers Squibb’s immune checkpoint inhibitor nivolumab and standard of care (SoC) chemotherapy, in second-line metastatic pancreatic ductal adenocarcinoma (PDAC). These results suggest that serum MPO may be a predictive biomarker for survival in the CM24+Nivolumab + Nal-IRI/5FU/LV arm. The company also announced that it will host a virtual KOL event on Thursday, July 11, 2024 at 10:30 AM ET to discuss the results in detail. To register for the event, click here. Interim results that were presented on June 1, 2024 during a late-breaking abstract poster presentation at the 2024 American Society of Clinical Oncology (ASCO) Annual Meeting demonstrated a 26% reduction in risk of death (HR=0.74) and a 28% risk reduction in progression or death (HR=0.72) in previously-treated patients treated with CM24+nivolumab+Nal-IRI/5FU/LV vs. Nal-IRI/5FU/LV chemotherapy alone (i.e., SoC). Median OS was prolonged by 2.1 months and median PFS was extended by 1.9 months in the CM24+nivolumab+Nal-IRI/5FU/LV regimen vs. SoC. The prolongation of both OS and PFS by the CM-24-nivolumab therapy is further supported by a higher ORR (25% vs 7%), DCR (63% vs 40%), and decrease in CA19-9 level (61% decrease vs. 34% increase). “The concordant and consistent improvement in primary and all secondary endpoints including OS, PFS, ORR, DCR and CA19-9 are compelling, and the addition of a potential predictive biomarker provides further support for the potential of CM24 in combination with nivolumab plus the SoC chemotherapy regimen Nal-IRI/5FU/LV to improve clinical outcomes for those with advanced metastatic PDAC.” stated Gil Efron, Chief Executive Officer of Purple Biotech. “We plan to report further clinical study data in the second half of 2024.” New Interim Exploratory Biomarker Data: This interim biomarker analysis comparing the experimental and control arms suggests measured baseline serum MPO as a potential clinical outcome biomarker for CM24-nivolumab therapy. Enhanced MPO levels were measured in >90% of the patients with mean MPO over 6-fold higher than healthy donors. The mean MPO is used as a threshold for evaluating MPO as a potential biomarker. The effect of the CM24-nivolumab therapy in combination with Nal-IRI/5FU/LV is most pronounced among patients with serum MPO levels below the mean MPO and is associated with OS improvement of 3.6 months in median OS of 8.1 months vs. 4.5 months (HR 0.34 (95% CI: 0.099-1.149)). While in a small sample size, these findings suggest that serum MPO may be a predictive biomarker for the treatment effect of CM24+Nivo+ Nal-IRI/5FU/LV on OS. Presentation of the biomarker data is planned at an upcoming medical conference. The experimental arms of the randomized Phase 2 study administered patients with CM24 plus nivolumab and a choice of one of two SoC chemotherapies used in second-line PDAC, and dependent on prior first line therapy regimen; either gemcitabine/nab-paclitaxel or liposomal irinotecan (Nal-IRI)/5-fluorouracil (5-FU) and leucovorin (LV) (Nal-IRI/5FU/LV), while the control arms administered either respective SoC chemotherapy alone. Interim results are provided for the Nal-IRI/5FU/LV sub study. An analysis of the gemcitabine/nab-paclitaxel sub study will be performed later when the data sufficiently matured. CM24 is a humanized monoclonal antibody that blocks CEACAM1, an immune checkpoint protein responsible for tumor immune evasion and poor tumor response and/or resistance to immune checkpoint inhibitors. Neutrophil extracellular traps (NETs) which are involved in immune evasion and metastasis known to affect disease progression and patient survival. CM24, a CEACAM1 antibody, was reported1 to also bind to NET structures and significantly suppresses the NET-induced migration of various cancer cells, as an additional Mechanism of Action. In an earlier part of this study, CM24+nivolumab treatment significantly reduced the level of the NET marker, as represented by measurable MPO in patient serum. The poster presentation at ASCO 2024 may be viewed on Purple Biotech’s website HERE and the abstract may be accessed on ASCO’s website HERE. 1. Poster presentation at AACR Special Conference: Pancreatic cancer 2023: Phase 1 Study of CM24 in Combination with Nivolumab in Patients with Advanced Pancreatic Cancer - Survival, Exploratory Biomarkers and Effect on Neutrophil Extracellular Traps (NETs) 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 also 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 induce 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 . 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; final results from clinical studies, including our NT219 and CM24 studies, may vary from the interim analysis, 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, . CONTACTS: Company Contact: Lior Fhima Chief Financial Officer IR@purple-biotech.com