Verastem, Inc.

Phase 1 dose-escalation study to evaluate VS-7375 in the U.S., with plans to expand as monotherapy into pancreatic cancer and non-small cell lung cancer cohorts, along with colorectal cancer in combination with cetuximab BOSTON, MA, USA I June 24, 2025 I Verastem Oncology (Nasdaq: VSTM), a biopharmaceutical company committed to advancing new medicines for patients with RAS/MAPK pathway-driven cancers, today announced that the first patient has been dosed in VS-7375-101, the U.S. Phase 1/2a clinical trial evaluating VS-7375, a potential best-in-class oral KRAS G12D (ON/OFF) inhibitor, in patients with advanced KRAS G12D mutant solid tumors. “We continue to make strong progress against our strategic priorities and key milestones that we set at the beginning of the year, including our recent FDA approval and commercial launch and our positive updated results and trial expansion in first-line metastatic pancreatic cancer. We are now excited to have achieved another milestone with the initiation of our first clinical trial and first patient dosed with VS-7375, a potential best-in-class oral KRAS G12D (ON/OFF) inhibitor, in the U.S.,” said Dan Paterson, president and chief executive officer of Verastem Oncology. VS-7375-101 is a Phase 1/2a study being conducted in the U.S., with plans to expand globally, and will evaluate the safety and efficacy of VS-7375 in patients with advanced KRAS G12D mutant solid tumors. The monotherapy dose escalation phase of the study will use a starting dose of 400 mg, based on an efficacious dose identified in the Phase 1/2 study conducted in China by the Company’s partner, GenFleet Therapeutics. GenFleet announced encouraging initial safety and efficacy results from its Phase 1 dose-escalation phase of its study of VS-7375 (known as GFH375 in China) at the 2025 ASCO Annual Meeting. Verastem plans to dose-escalate across dose levels where encouraging initial safety and efficacy were observed in patients with advanced KRAS G12D mutant solid tumor cancers in GenFleet’s study. Upon successful completion of the dose-escalation phase, the Company will select a recommended Phase 2 dose and assess the efficacy and safety of monotherapy VS-7375 in expansion cohorts of patients with advanced pancreatic cancer and non-small cell lung cancer. In parallel with the monotherapy dose escalation, Verastem will evaluate VS-7375 in combination with cetuximab in advanced solid tumors. Subject to the results of the Phase 1 dose escalation combination of VS-7375 and cetuximab, Verastem plans to initiate a combination expansion cohort in colorectal cancer. “We are excited that the first patient has initiated treatment with VS-7375 in the U.S. We believe we can leverage VS-7375’s dual inhibition of both the ON/OFF states to improve on the efficacy seen to date with other KRAS G12D-selective agents. With the trial underway, we aim to accelerate the program’s development given the lack of FDA-approved, KRAS G12D-targeted treatments available to patients with KRAS G12D cancers,” said John Hayslip, M.D., chief medical officer of Verastem Oncology. “We are strongly encouraged by the anti-tumor activity seen in the updated Phase 1 data presented at the ASCO Annual Meeting from our partner GenFleet Therapeutics’ trial in China. We are advancing VS-7375 in the U.S. to target KRAS G12D mutant advanced solid tumors in areas of significant unmet need, such as pancreatic, colorectal, and lung cancers.” About KRAS G12D KRAS G12D represents 26% of all KRAS mutations, making it the most prevalent KRAS mutation in human cancers. The KRAS G12D mutation occurs most commonly in pancreatic (37%), colorectal (12.5%), endometrial (8%), and non-small cell lung (5%) cancers. Currently, no therapies are approved by the U.S. Food and Drug Administration (FDA) specifically targeting KRAS G12D mutations in cancer. About VS-7375, an Oral KRAS G12D (ON/OFF) Inhibitor VS-7375 is a potential best-in-class, potent, and selective oral KRAS G12D dual ON/OFF inhibitor. VS-7375 is the lead program from the Verastem Oncology discovery, development, and commercialization collaboration with GenFleet Therapeutics. Verastem announced in April 2025 that the U.S. Investigational New Drug (IND) application for VS-7375 was cleared, and it initiated a Phase 1/2a clinical trial (NCT07020221), VS-7375-101, in May 2025. GenFleet’s IND for VS-7375 (known as GFH375 in China) was approved in China in June 2024, and initial safety and efficacy results from the Phase 1 portion of the study were announced at ASCO 2025. In February 2025, GenFleet announced that the first patient was dosed in the Phase 2 portion of the study. About Verastem Oncology Verastem Oncology (Nasdaq: VSTM) is a biopharmaceutical company committed to developing and commercializing new medicines to improve the lives of patients diagnosed with RAS/MAPK pathway-driven cancers. Verastem markets AVMAPKI™ FAKZYNJA™ CO-PACK in the U.S. Our pipeline is focused on novel small molecule drugs that inhibit critical signaling pathways in cancer that promote cancer cell survival and tumor growth, including RAF/MEK inhibition, FAK inhibition, and KRAS G12D inhibition. For more information, please visit www.verastem.com and follow us on LinkedIn . SOURCE: Verastem Oncology

劲方医药宣布GFH375治疗KRAS G12D突变晚期实体瘤患者的I期临床数据登陆2025年美国临床肿瘤学会（ASCO）年会快速口头报告：初步研究数据显示了GFH375的良好口服生物利用度、高选择性抑瘤活性，以及对胰腺导管腺癌（PDAC）、非小细胞肺癌（NSCLC）患者的优秀初步疗效。GFH375于2024年6月在国内临床申请获批，目前GFH375/VS-7375已在国内进入II期研究；在美国也已进入I/IIa期研究，由劲方合作伙伴Verastem Oncology启动推进。报告标题：A first-in-human phase I/II study of GFH375, a highly selective and potent oral KRAS G12D inhibitor in patients with KRAS G12D mutant advanced solid tumors（摘要编号：3013）目前，GFH375单药疗法I期试验中已有62名经治晚期KRAS G12D突变实体瘤患者入组。98%的患者入组时合并肿瘤转移（均为IV期），主要包括肝转移（53%）、骨转移（21%）。75%的患者入组时，已经接受过二线及以上治疗（二线40%、三线及以上35%）。所有患者中PDAC患者占比53%（33/62），NSCLC患者占比26%（16/62）；中位治疗持续时间为11.8周，中位反应时间为6.2周。 目标剂量组疗效截至数据截止日，49名患者接受日均剂量为400或600mg的口服治疗：其中43名患者接受过至少一次治疗后肿瘤评估，总体客观缓解率（ORR）为42%、疾病控制率（DCR）为91%；23名可评估PDAC患者ORR为52%、DCR为100%；12名可评估NSCLC患者ORR为42%、DCR为83%。药代动力学分析显示，口服日均剂量400或600 mg可使药物平均谷浓度在AsPC-1细胞中达到p-ERK抑制IC90值的三倍以上；目前研究已确定600 mg QD为II期试验推荐剂量（RP2D）。所有剂量组疗效截至数据截止日，52名患者完成至少一次治疗后肿瘤评估，所有剂量组患者的ORR为38%，DCR为90%；其中38名患者靶病灶缩小、20名患者达到部分缓解。研究初步显示了GFH375的良好口服生物利用度，对PDAC等实体瘤患者、以及多线治疗后疾病进展的患者展现了显著的抑瘤活性。初步临床数据显示GFH375整体安全性/耐受性良好，100 mg QD剂量组即已观察到抗肿瘤活性，100-900 mg QD的所有剂量组均未观察到剂量限制性毒性。所有入组患者当中，治疗相关不良事件（TRAE）主要为1-2级，在20%以上患者当中的最常见TRAE包括腹泻、恶心、呕吐、贫血等；3级以上TRAE主要为中性粒细胞减少（8%）、腹泻（5%）；TRAE整体可控，无TRAE相关死亡发生。此次快速口头报告由摘要第一作者、上海胸科医院肿瘤科主任医师艾星浩在ASCO年会完成。上海胸科医院肿瘤科陆舜教授 “很高兴看到GFH375在胰腺癌、非小细胞肺癌等瘤种取得了鼓舞人心的疗效。G12D为多瘤种患者当中最常见的KRAS突变分型，我们也在研究中深切感受到巨大的未满足临床需求。目前GFH375已与海外口服KRAS G12D抑制剂处于并跑阶段，期待后续更多的积极进展，早日为众多患者带来新的希望。”劲方医药首席医学官汪裕博士“基于公司管线中首个上市产品氟泽雷塞（KRAS G12C抑制剂）的研发经验，劲方RAS疗法矩阵不断深化、拓展。GFH375是公司第二款临床获批的选择性RAS抑制剂，初步研究数据显示了GFH375治疗PDAC、NSCLC等瘤种的优秀疗效，而晚期PDAC尤其缺乏有效的靶向疗法。我们期待GFH375在多种适应症中实现广阔的治疗前景。” 关于KRAS G12D突变及GFH375/VS-7375RAS蛋白为二元分子开关，在与GDP（二磷酸鸟苷）结合的失活状态和与GTP（三磷酸鸟苷）结合的活化状态之间切换，以此调控RAF-MEK-ERK、PI3K-AKT-mTOR等通路。RAS的致癌突变导致其 GTP 水解酶活性被破坏，从而令RAS蛋白主要以活化的GTP结合形式存在，会导致细胞恶性增殖和生物行为学的改变。RAS家族蛋白主要分为KRAS、HRAS、NRAS三大类，其中KRAS突变是肿瘤中最常见的基因突变之一。在KRAS基因突变中，G12D、G12V、G12C突变型占比位列前三。KRAS G12D突变型在KRAS突变中最为常见，主要出现在胰腺导管腺癌、结直肠癌、肺腺癌患者中，且多见于无吸烟史、PD-1抑制剂单药疗效不佳的人群。其中，胰腺导管腺癌（PDAC）患者出现KRAS G12D突变比例最高（约40%），长期缺乏有效靶向疗法、且患者五年生存率低于10%。GFH375为口服高活性、高选择性小分子KRAS G12D（ON/OFF）抑制剂，通过非共价形式结合KRAS G12D蛋白，抑制其与下游效应蛋白结合，从而在细胞中破坏KRAS G12D对下游通路的持续活化，最终高效抑制肿瘤细胞增殖。临床前研究已显示GFH375单药对肿瘤生长的抑制效应随用药剂量和周期增长而提升，且在激酶选择性和安全性靶点测试中显示低脱靶风险。 2023年8月，劲方医药与纳斯达克上市公司Verastem Oncology（纳斯达克股票代码：VSTM）对劲方开发的三款产品达成授权及早期合作开发协议。2025年1月，Verastem宣布对GFH375/VS-7375行使选择权，获得GFH375在大中华区之外的开发和商业化权利。关于劲方医药劲方医药是一家全球布局的创新药物开发企业，聚焦肿瘤、免疫类疾病领域高度未满足的临床需求，以疾病生物学机理和临床转化医学为核心，构建并发挥自主化、一体化研发体系优势，主攻尚无临床验证的创新靶点与适应症，并拥有全球自主知识产权。自2017年成立以来，劲方医药已建立包含多个自主研发的“全球新”大、小分子项目，多个产品在中国、欧洲、美国进入全球多中心临床试验，包括多项后期或关键性临床研究。达伯特®（氟泽雷塞）为劲方管线中首个国内上市获批产品，也是国内首个、全球第三个上市的KRAS G12C抑制剂，曾获得国家药品监督管理局优先审评及两项突破性疗法资格认定；氟泽雷塞、西妥昔单抗的一线联合疗法也在欧洲进入II期研究，为全球首个KRAS、EGFR抑制剂一线非小细胞肺癌联用治疗方案。目前，公司已形成RAS靶向疗法的一体化深耕矩阵，并积极拓展其他“全球新”靶向药及新类型疗法管线开发。同时，公司近年来不断深化商业合作网络，已与多个境内外上市公司达成战略授权协议、或开展“全球新”临床合作并已取得积极进展。

Fresh off a regulatory win for its doublet therapy in ovarian cancer, Verastem Oncology is now looking to duplicate that success in pancreatic cancer.The biotech is evaluating Avmapki (avutometinib) and Fakzynja (defactinib) — a RAF/MEK clamp and selective FAK inhibitor, respectively — in combination with chemotherapy in the Phase I/II RAMP 205 study as a front-line treatment for patients with metastatic pancreatic ductal adenocarcinoma (PDAC).Earlier this month, the FDA approved Avmapki Fakzynja Co-pack for adults with KRAS-mutated, recurrent, low-grade serous ovarian cancer (LGSOC) who have received prior systemic therapy after the doublet demonstrated a confirmed overall response rate of 44% in the Phase II RAMP 201 trial. In PDAC, early data from RAMP 205 — shared in an abstract ahead of the American Society of Clinical Oncology (ASCO) meeting — showed that the combo led to an overall response rate (ORR) of 83% in a dozen patients. Verastem's shares ticked up about 3% during after-hours trading on Thursday, after initially gaining 12%."The exciting results from the RAMP 205 trial reinforce our commitment to maximising the synergistic potential of the avutometinib plus defactinib combination in other advanced solid tumors," CEO Dan Paterson said in a company release. At the April 25 data cutoff, 60 patients in RAMP 205 were randomised evenly across five different dosing cohorts. According to Verastem, the 12 participants who received dose level 1 — a 2.4-mg dose of Avmapki twice a week, plus 200-mg Avmapki twice-daily for three weeks out of every four — saw "strong and consistent results" with the combination treatment. Eight patients experienced a confirmed partial response, while two have unconfirmed partial responses and remain on treatment. Verastem has selected this regimen for the recommended Phase II dose, and plans to enrol up to 29 patients in the cohort. The biotech has also begun planning a registrational Phase III study evaluating Avmapki and Fakzynja for front-line metastatic PDAC, which it expects to launch next year.