Avutometinib

-- PAS-004 demonstrates preliminary clinical activity as a monotherapy in patients with heavily pre-treated, refractory solid tumors -- -- One patient in cohort 4A (15mg capsule) with stage 4 BRAF-mutated melanoma, who had progressed after two prior lines of therapy, including a prior MEK inhibitor + BRAF inhibitor combination therapy, achieves over 5 months of stable disease with tumor volume reduction of -14.9% and remains on treatment -- -- PAS-004 pharmacokinetics profile potentially supports a prolonged target engagement at well-tolerated doses -- MIAMI, June 02, 2025 (GLOBE NEWSWIRE) -- Pasithea Therapeutics Corp. (NASDAQ: KTTA) (“Pasithea” or the “Company”), a clinical-stage biotechnology company developing PAS-004, a next-generation macrocyclic MEK inhibitor, today announced updated interim results from its ongoing dose escalation Phase 1 study evaluating PAS-004 in advanced cancer patients in a poster presentation at the American Society of Clinical Oncology (ASCO) 2025 Annual Meeting The Phase 1 clinical trial is a multi-center, open-label, dose escalation, modified 3+3 study design to evaluate the safety, tolerability, pharmacokinetic (PK), pharmacodynamic (PD), and preliminary efficacy of PAS-004 in patients with MAPK pathway-driven advanced solid tumors with a documented RAS, NF1 or RAF mutation, or patients who have failed BRAF/MEK inhibition (NCT06299839). As of the cut-off date of April 2, 2025, a total of 21 patients had been enrolled and received at least one dose of PAS-004 in six cohorts (Capsules: 2mg, 4mg, 8mg, 15mg, 22mg / Tablets: 4mg). The most common cancer diagnosis was pancreatic cancer (28.6%), colorectal cancer (28.6%), and melanoma (23.8%). All treatment-related adverse events (AEs) have been either grade 1 or grade 2. No known MEK inhibitor class-related AEs such as ocular toxicities, cardiotoxicities, and skin toxicities were observed during the DLT observation period. No DLTs were reported, and dose escalation is ongoing. Preliminary PAS-004 PK analysis suggests linear PK with an estimated half-life in excess of 60 hours. The Cmax (peak) to Cmin (trough) ratio was below 2 at steady state in all dose levels and has achieved potentially sufficient exposures for target engagement. This is supported by previously reported preliminary pERK inhibition observed in cohort 3 (8mg capsule), with pERK inhibition of up to 91%. PAS-004 has demonstrated a dose-dependent PK profile and preliminary clinical activity as a monotherapy in patients with heavily pre-treated, refractory solid tumors. In the efficacy evaluable population (n=16), early response evaluation reveals stable disease (SD) by RECIST 1.1 in 10 patients at some point during the trial, with progression free survival of up to 159 days and overall survival of up to 253 days. In Cohort 4A (15mg capsule), two out of three patients achieved stable disease and remain on therapy. One patient with stage 4 KRAS G12R-mutated pancreatic cancer, having progressive disease while on three prior lines of therapy, achieved a tumor diameter reduction of -9.8% and remains on study for over 5 months. The second patient with Stage 4 BRAF-mutated melanoma, having progressed on two prior lines of therapy, including a prior MEK inhibitor + BRAF inhibitor combination treatment, achieved tumor diameter reduction of -14.9% and remains on study for over 5 months. “The interim results from our ongoing Phase 1 study are encouraging and we believe underscore the potential of PAS-004 as a best-in-class MEK inhibitor to serve patients with a broad range of MAPK pathway driven tumors,” said Dr. Tiago Reis Marques, Chief Executive Officer of Pasithea. “MEK inhibitors have been a transformative class of treatment therapies and we continue to witness groundbreaking advances and new approvals with this class of drug across tumor types and mutational profiles. At ASCO 2025, over 15 data sets featuring MEK inhibitors are being presented underscoring the growing momentum in this field. Additionally, we have recently seen approval of two novel MEK inhibitors, mirdametinib and avutometinib, highlighting the continued relevance of this drug class in the past several months alone. As a macrocyclic compound, PAS-004 potentially represents a significant advancement in the MEK inhibitor field by offering high selectivity and sustained pathway suppression while maintaining good tolerability. This profile may make it optimal for both monotherapy and combination therapy, including in patients who have failed prior MEK inhibitors.” The poster presentation will be available on the Pasithea website on the date of the poster session. About Pasithea Therapeutics Corp. Pasithea is a clinical-stage biotechnology company primarily focused on the research and development of its lead drug candidate, PAS-004, a next-generation macrocyclic MEK inhibitor intended for the treatment of RASopathies, MAPK pathway-driven tumors, and other diseases. The Company is currently testing PAS-004 in a Phase 1 clinical trial in advanced cancer patients (NCT06299839), and a Phase 1/1b clinical trial in adult patients with neurofibromatosis type 1 (NF1)-associated plexiform neurofibromas (NCT06961565). Forward Looking Statements This press release contains statements that constitute “forward-looking statements” made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. These forward-looking statements include statements regarding the Company’s ongoing Phase 1 clinical trial of PAS-004 in advanced cancer patients, the Company’s Phase 1/1b clinical trial of PAS-004 in adult NF1 patients, and the safety, tolerability, pharmacokinetic (PK), pharmacodynamics (PD) and preliminary efficacy of PAS-004, as well as all other statements, other than statements of historical fact, regarding the Company’s current views and assumptions with respect to future events regarding its business, as well as other statements with respect to the Company’s plans, assumptions, expectations, beliefs and objectives, the success of the Company’s current and future business strategies, product development, pre-clinical studies, clinical studies, clinical and regulatory timelines, market opportunity, competitive position, business strategies, potential growth opportunities and other statements that are predictive in nature. Forward-looking statements are subject to numerous conditions, many of which are beyond the control of the Company. While the Company believes these forward-looking statements are reasonable, undue reliance should not be placed on any such forward-looking statements, which are based on information available to the Company on the date of this release. These forward-looking statements are based upon current estimates and assumptions and are subject to various risks and uncertainties, including risks that future clinical trial results may not match results observed to date, may be negative or ambiguous, or may not reach the level of statistical significance required for regulatory approval, as well as other factors set forth in the Company’s most recent Annual Report on Form 10-K, Quarterly Report on Form 10-Q and other filings made with the U.S. Securities and Exchange Commission (SEC). Thus, actual results could be materially different. The Company undertakes no obligation to update these statements whether as a result of new information, future events or otherwise, after the date of this release, except as required by law. Pasithea Therapeutics Contact Patrick GaynesCorporate Communicationspgaynes@pasithea.com

在2025 ASCO年会上，Verastem Oncology公布了1/2期临床试验RAMP 205的最新积极安全性与疗效数据。该试验旨在评估小分子抑制剂avutometinib与defactinib，以及吉西他滨（gemcitabine）和白蛋白结合型紫杉醇（nab-paclitaxel）构成的组合疗法，一线治疗转移性胰腺导管腺癌（PDAC）患者的效果。截至2025年4月25日，剂量水平1队列患者的客观缓解率（ORR）达到83%，该剂量被选定为2期临床试验推荐剂量（RP2D）。截至2025年4月25日，共有60名患者（每个队列12名）分别接受了五种不同给药方案的治疗。其中剂量水平1队列展现出最高的缓解率。在所有五个剂量队列中，92%（48/52）可评估疗效的患者出现肿瘤缩小。在剂量水平1队列的12名患者中，10名患者获得了部分缓解，其中8例为已确认，另2例尚未确认且仍在治疗中。鉴于这些显著且一致的疗效数据，该公司已选择剂量水平1为RP2D，目前正在以该剂量继续招募最多29名患者。Avutometinib是一种RAF/MEK抑制剂，它能够诱导MEK与ARAF、BRAF和CRAF形成非活性复合物，可能通过最大程度地抑制RAS信号通路产生更全面和持久的抗肿瘤反应。Defactinib是一款FAK抑制剂。这两款药物构成的组合疗法在今年5月8日获得美国FDA的批准，用于治疗复发性低级别浆液性卵巢癌成年患者，这些患者曾接受过系统性治疗并且其肿瘤携带KRAS突变。推荐阅读总生存期翻3倍！新研究揭示，攻克“癌王”，化疗够量效果才更好减少化疗，疗效相当，还更安全！《柳叶刀》子刊：转移性胰腺癌新治疗策略《柳叶刀》子刊：胰腺癌获突破性进展！溶瘤病毒疗法安全可行浙大二院&MD安德森癌症中心研究：新药使80%肺癌患者肿瘤缩小，疾病控制率达87%！参考资料：[1] Verastem Oncology Announces Positive Updated Results from RAMP 205 Evaluating Avutometinib Plus Defactinib in Combination with Standard-of-Care Chemotherapy in Frontline Metastatic Pancreatic Ductal Adenocarcinoma. Retrieved May 23, 2025, from https://www.businesswire.com/news/home/20250522753974/en/Verastem-Oncology-Announces-Positive-Updated-Results-from-RAMP-205-Evaluating-Avutometinib-Plus-Defactinib-in-Combination-with-Standard-of-Care-Chemotherapy-in-Frontline-Metastatic-Pancreatic-Ductal-Adenocarcinoma免责声明：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。版权说明：欢迎个人转发至朋友圈，谢绝媒体或机构未经授权以任何形式转载至其他平台。转载授权请在「药明康德」微信公众号回复“转载”，获取转载须知。分享，点赞，在看，传递医学新知