本期看点
1. SystImmune公司与百时美施贵宝(Bristol Myers Squibb)潜在“first-in-class”的抗癌双特异性抗体偶联药物(ADC)iza-bren(BL-B01D1)的早期临床试验的积极结果。
2. Ciforadenant与ipilimumab和nivolumab的免疫检查点抑制剂三联疗法的1b/2期临床试验获积极中期数据,与单独使用ipilimumab和nivolumab的历史数据相比有所改善。
Iza-bren(BL-B01D1):公布1期临床试验数据
SystImmune公司与百时美施贵宝公布其全球1期研究US-Lung-101的安全性和有效性数据。该研究评估了ADC疗法iza-bren在多种肿瘤患者中的疗效与安全性。Iza-bren是一款潜在“first-in-class”的EGFR/HER3靶向双特异性ADC。该疗法的双重作用机制可阻断EGFR和/或HER3信号,抑制癌细胞增殖与存活,同时在抗体介导的内化后释放Topo1i有效载荷,引发细胞毒性反应,最终导致癌细胞死亡。Iza-bren已获美国FDA授予突破性疗法认定,用于既往接受过治疗的EGFR突变型非小细胞肺癌(NSCLC)患者。
截至2025年7月23日,iza-bren在多种高度预处理的实体瘤患者中,包括EGFR突变型与野生型NSCLC,展现出令人鼓舞的抗肿瘤活性,并具备可控的安全性特征。血液学不良事件可通过常规医学手段有效控制,且未观察到间质性肺病。其中,接受2.5 mg/kg剂量治疗的患者中,55%(11/20)获得经确认的缓解,中位无进展生存期(PFS)为5.4个月;EGFR突变组(3/10例)及非突变组(3/4例)均观察到经确认的缓解。
Ciforadenant:公布1b/2期临床试验的中期数据
Corvus Pharmaceuticals公司宣布,其候选药物ciforadenant用于治疗转移性肾细胞癌(RCC)患者的1b/2期临床试验取得了积极的中期数据。Ciforadenant是一种在研口服小分子免疫检查点抑制剂。此前,ciforadenant已被证明可以阻断肿瘤中髓系细胞的免疫抑制作用。临床前研究结果显示,ciforadenant与抗PD-1和抗CTLA-4抗体联合使用具有协同作用。
截至2025年5月的数据,ciforadenant与ipilimumab和nivolumab的三药联合疗法是可行且耐受性良好的。在年龄中位数为61.5岁的患者群体中(其中82%为预后较差或中等的患者),治疗的深度缓解率达到了34%,与单独使用ipilimumab和nivolumab的历史数据相比有所改善。客观缓解率(ORR)为46%,包括2例完全缓解和21例部分缓解;中位PFS为11.04个月。
mRNA-4359:公布1/2期临床试验的初步数据
Moderna公司宣布,其癌症疫苗mRNA-4359联合PD-1抑制剂pembrolizumab,用于治疗免疫检查点抑制剂耐药或复发(CPI-R/R)黑色素瘤患者的1/2期临床研究获得积极初步结果。mRNA-4359是一种在研的免疫逃逸靶向癌症抗原疗法,可编码PD-L1与IDO1两种常见免疫逃逸通路的表位,以诱导抗原特异性T细胞反应,从而直接杀伤肿瘤细胞并清除免疫抑制细胞。
研究纳入29例曾接受至少一种免疫检查点抑制剂治疗的CPI-R/R黑色素瘤患者。结果显示,在所有可评估患者中,ORR为24%,疾病控制率(DCR)为60%。在PD-L1阳性(TPS≥1%)且可评估疾病的患者中,ORR达67%(6/9),治疗成功诱导了外周抗原特异性T细胞反应及新型T细胞受体克隆。研究中尚未达到中位缓解持续时间(DOR),提示该疫苗的疗效持久。mRNA-4359目前已进入该1/2期研究的临床2期部分。
参考资料:
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