信达生物(01801)全球首创PD-1/IL-2α双特异性抗体融合蛋白拟纳入突破性疗法

智通财经
May 23, 2025

智通财经APP获悉,5月23日,国家药品监督管理局(NMPA)药品审评中心(CDE)官网显示,信达生物(01801)的PD-1/IL-2双特异性抗体融合蛋白IBI363拟纳入突破性疗法,用于治疗经含铂化疗及抗PD-1/PD-L1免疫治疗失败的局部晚期或转移性鳞状非小细胞肺癌。

据悉,IBI363是由信达生物自主研发的全球首创PD-1/IL-2α-bias双特异性融合蛋白,同时具有阻断PD-1/PD-L1通路和激活IL-2通路两项功能。IBI363的IL-2臂经过了设计改造,保留了其对IL-2 Rα的亲和力,但削弱了对IL-2Rβ和IL-2Rγ的结合能力,以此降低毒性;而PD-1结合臂可以同时实现对PD-1的阻断和IL-2的选择性递送。

由于新激活的肿瘤特异性T细胞同时表达PD-1和IL-2α,这一差异性策略可以更精确和有效地实现对该T细胞亚群的靶向和激活。IBI363不仅在多种荷瘤药理学模型中展现出了良好抗肿瘤活性,在PD-1耐药和转移模型中也表现出了突出的抑瘤效力。

此前,IBI363已被CDE纳入突破性治疗药物(BTD)品种名单,拟定适应症为既往未经过系统性治疗的不可切除局部晚期或转移性肢端型及黏膜型黑色素瘤。

信达生物正在中国、美国、澳大利亚开展临床研究探索IBI363在针对各种恶性肿瘤的有效性和安全性。IBI363已开出首个关键注册临床研究,用于治疗未经免疫治疗的粘膜型和肢端型黑色素瘤。IBI363已获美国FDA两项快速通道资格认定,分别用于治疗晚期鳞状非小细胞肺癌和黑色素瘤。

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