本期看点:

1. 突破性RAS抑制剂 daraxonrasib用于治疗既往接受过治疗的转移性RAS突变胰腺导管腺癌(PDAC)患者,其1/2期临床试验的 积极结果发表在《新英格兰医学杂志》 。

2. 创新BTK降解剂bexobrutideg(NX-5948)用于治疗慢性自发性荨麻疹(CSU)的临床前和1期临床试验数据积极,接受治疗的健康受试者的血液和皮肤中均实现了快速且强力的BTK降解。

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Daraxonrasib(RMC-6236):公布1/2期临床试验数据

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Revolution Medicines公司日前宣布,著名医学期刊《新英格兰医学杂志》已发表一份,介绍了在研RAS抑制剂daraxonrasib针对既往接受过治疗的转移性RAS突变胰腺导管腺癌患者的1/2期临床试验数据。Daraxonrasib是一种在研口服、可与激活状态的RAS结合的多选择性、非共价抑制剂。美国FDA已授予daraxonrasib突破性疗法认定和孤儿药资格,用于治疗既往接受过治疗、携带G12突变的转移性PDAC患者。Daraxonrasib通过抑制野生型和突变型处于激活状态下的RAS蛋白与其下游效应因子之间的相互作用,抑制RAS信号传导。

此次在《新英格兰医学杂志》上发表的试验数据显示,在26例携带RAS G12突变、接受300 mg剂量daraxonrasib二线治疗的患者亚组中,客观缓解率达到35%(95% CI:17%~56%)。中位缓解持续时间为8.2个月(95% CI:3.8个月至无法评估),中位无进展生存期为8.5个月,中位总生存期为13.1个月。在38例携带RAS G12、G13或Q61突变的患者中,29%的患者达到客观缓解(95% CI:15%~46%)。中位缓解持续时间为8.2个月(95% CI:3.8个月至8.8个月),中位无进展生存期为8.1个月,中位总生存期为15.6个月。

安全性方面,在接受300 mg或更低剂量daraxonrasib治疗的168例PDAC患者中,96%的患者报告了任意级别的治疗相关不良事件;30%的患者报告了3级或更高级别的此类事件。发生率至少为10%的治疗相关不良事件包括皮疹、腹泻、恶心、口腔炎或黏膜炎、呕吐和疲乏。

Bexobrutideg(NX-5948):公布1期临床试验数据

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Nurix Therapeutics公司公布了其开发的创新BTK降解剂bexobrutideg用于治疗慢性自发性荨麻疹的临床前和1期临床试验数据。Bexobrutideg是一种具有口服生物利用度的BTK降解剂,旨在通过招募cereblon E3连接酶复合物来消除BTK蛋白。该机制能高效标记BTK蛋白以进行蛋白酶体降解,从而同时消除BTK的激酶依赖性和支架功能。

研究结果表明,靶向降解BTK可能比单纯的BTK抑制能更广泛、更深入地抑制致病性免疫信号,这为bexobrutideg未来在炎症和免疫学适应症中的临床开发提供了支持。在临床前研究中,bexobrutideg不仅在关键的免疫细胞类型中展现出强效的BTK降解能力,还在抑制FcεRI驱动的荨麻疹病理反应方面表现出优于已上市BTK抑制剂的效果。在健康受试者中,无论是单次还是多次递增剂量的口服给药,bexobrutideg在血液和皮肤中均实现了快速且强力的BTK降解。这些数据共同支持了bexobrutideg在CSU中实现深层组织层面的致病性免疫信号抑制的潜力。

Soquelitinib:公布1期临床试验数据

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Corvus Pharmaceuticals公司公布了其小分子白细胞介素-2诱导的T细胞激酶(ITK)抑制剂soquelitinib用于治疗中度至重度特应性皮炎的1期临床试验数据。ITK是一种主要表达于T细胞中的酶,在T细胞和自然杀伤(NK)细胞的免疫功能中起重要作用。通过抑制ITK,soquelitinib有望抑制自身免疫和炎症反应。

此次公布的结果显示,soquelitinib在所有4个队列中均展现出良好的安全性与积极的疗效,且队列1-3存在剂量依赖性疗效趋势。在安全性方面,所有队列均未发现重大安全问题,不良事件发生率(41.7%)与安慰剂组持平,均为1-2级,且未导致剂量调整或中断,也未出现严重不良事件及显著实验室指标异常。在疗效方面,队列3(200 mg每日两次,持续4周)和队列4(200 mg每日两次,持续8周)分别有50%和75%的患者达到了湿疹面积和严重度指数较基线减少75%(EASI 75);两队列中分别有8%和25%的患者达到EASI 90;两队列中分别有25%和33%患者的研究者整体评估(IGA)评分为0/1(皮肤症状清除或几乎清除)。在队列3和队列4中,疾病控制效果在整个治疗后随访期(分别为90天和30天)内得以持续维持。相比之下,已获批系统性疗法的公开数据显示,患者通常在停药后四周内即出现病情恶化或反弹,部分病例甚至需要接受救援治疗。

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接受soquelitinib治疗4周和8周后患者实现持久缓解且无反弹(图片来源:参考资料[7])

参考资料:

[1] Positive Results from PulseSight’s Phase I Clinical Trial of PST-611 in Dry AMD/Geographic Atrophy Presented at ARVO 2026. Retrieved May 15, 2026, from https://www.globenewswire.com/news-release/2026/05/11/3291570/0/en/positive-results-from-pulsesight-s-phase-i-clinical-trial-of-pst-611-in-dry-amd-geographic-atrophy-presented-at-arvo-2026.html

[2] MBX Biosciences Provides Obesity Portfolio Update Including Initial Phase 1 Data for MBX 4291 Supporting Potential for Once-Monthly Dosing. Retrieved May 15, 2026, from https://www.globenewswire.com/news-release/2026/05/11/3291731/0/en/mbx-biosciences-provides-obesity-portfolio-update-including-initial-phase-1-data-for-mbx-4291-supporting-potential-for-once-monthly-dosing.html

[3] NexThera Unveils U.S. Phase 1 Data for Eye-drop wAMD Candidate ‘NT-101’. Retrieved May 15, 2026, from https://www.biospectator.com/news/view/28691

[4] Enliven Therapeutics Announces Oral Presentation at the EHA 2026 Congress Featuring Additional Positive Phase 1 Clinical Trial Data for ELVN-001 in CML. Retrieved May 15, 2026, from https://www.prnewswire.com/news-releases/enliven-therapeutics-announces-oral-presentation-at-the-eha-2026-congress-featuring-additional-positive-phase-1-clinical-trial-data-for-elvn-001-in-cml-302769668.html

[5] Imviva Biotech Presents Data Demonstrating Durable Clinical Responses from Ongoing Phase 1/2 Study of CTA313 in Systemic Lupus Erythematosus at ASGCT 2026. Retrieved May 15, 2026, from https://www.globenewswire.com/news-release/2026/05/14/3295203/0/en/imviva-biotech-presents-data-demonstrating-durable-clinical-responses-from-ongoing-phase-1-2-study-of-cta313-in-systemic-lupus-erythematosus-at-asgct-2026.html

[6] Nurix Therapeutics Presents New Preclinical and Phase 1 Translational Data Supporting Bexobrutideg (NX-5948) in Chronic Spontaneous Urticaria at the 2026 Society for Investigative Dermatology Annual Meeting. Retrieved May 15, 2026, from https://www.globenewswire.com/news-release/2026/05/14/3295365/0/en/nurix-therapeutics-presents-new-preclinical-and-phase-1-translational-data-supporting-bexobrutideg-nx-5948-in-chronic-spontaneous-urticaria-at-the-2026-society-for-investigative-de.html

[7] Corvus Pharmaceuticals Presents Soquelitinib Phase 1 Atopic Dermatitis Data at the Society for Investigative Dermatology (SID) Annual Meeting. Retrieved May 15, 2026, from https://www.globenewswire.com/news-release/2026/05/14/3294761/0/en/corvus-pharmaceuticals-presents-soquelitinib-phase-1-atopic-dermatitis-data-at-the-society-for-investigative-dermatology-sid-annual-meeting.html

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[9] First Participant Dosed in AskBio Phase 1/Phase 2 Gene Therapy Trial of AB-1009 for Late-Onset Pompe Disease (LOPD). Retrieved May 15, 2026, from https://www.globenewswire.com/news-release/2026/05/11/3291834/0/en/first-participant-dosed-in-askbio-phase-1-phase-2-gene-therapy-trial-of-ab-1009-for-late-onset-pompe-disease-lopd.html

[10] Actuate Therapeutics Announces FDA Clearance of IND for Oral Elraglusib and Strategic Initiatives to Advance the Elraglusib Development Program. Retrieved May 15, 2026, from https://www.globenewswire.com/news-release/2026/05/11/3291744/0/en/actuate-therapeutics-announces-fda-clearance-of-ind-for-oral-elraglusib-and-strategic-initiatives-to-advance-the-elraglusib-development-program.html

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[13] First-in-Class Oral PKM2 Modulator SYX-5219 Phase 1a Trial Data to be Presented at SID 2026. Retrieved May 15, 2026, from https://www.sitryx.com/news/first-in-class-oral-pkm2-modulator-syx-5219-phase-1a-trial-data-to-be-presented-at-sid-2026

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