AACR 2022:Adebrelimab或安慰剂加卡铂和依托泊苷作为广泛期SCLC的一线治疗

2022-04-11 网络 网络

阿得贝利单抗(Adebrelimab,SHR-1316)是恒瑞医药自主研发的人源化抗PD-L1单抗,能通过特异性结合PD-L1分子从而阻断导致肿瘤免疫耐受的PD-1/PD-L1通路,重新激活免疫系统的

阿得贝利单抗(Adebrelimab,SHR-1316)是恒瑞医药自主研发的人源化抗PD-L1单抗,能通过特异性结合PD-L1分子从而阻断导致肿瘤免疫耐受的PD-1/PD-L1通路,重新激活免疫系统的抗肿瘤活性,从而达到治疗肿瘤的目的。

广泛期小细胞肺癌(ES-SCLC)临床治疗选择有限,预后差。最近,免疫疗法在ES-SCLC中显示出强大的临床疗效。在这项双盲3期临床试验中,吉林省肿瘤医院程颖团队评估了新型抗PD-L1抗体Adebrelimab(阿得贝利单抗,SHR-1316)与标准化疗(chemo)联合作为ES-SCLC的一线治疗的临床疗效。

对未经过系统治疗的ES-SCLC的患者按1:1随机分组,接受4-6个周期的治疗,其中一组接受Adebrelimab(20mg/kg,静脉注射,d1,q3w)+卡铂(AUC 5,d1,q3w)+依托泊苷(20mg/kg,静脉注射,d1,q3w)治疗,另一组接受安慰剂+卡铂(AUC 5,d1,q3w)+依托泊苷(20mg/kg,静脉注射,d1,q3w)治疗,随后接受阿得贝利单抗或安慰剂维持治疗。主要终点是总生存期(OS)。

462名患者被随机分组并接受治疗(Adebrelimab+化疗组230名;安慰剂+化疗组232名)。截至2021年10月8日,中位随访时间为13.5个月(所有患者;存活患者为22.5个月)。Adebrelimab+化疗组与安慰剂+化疗组相比,OS显著延长(中位OS 15.3个月 [95% CI 13.2-17.5 ]vs 12.8个月[ 95% CI 11.3-13.7],危险比HR=0.72,[95% CI 0.58-0.90],单侧p=0.0017);12个月时,Adebrelimab+化疗组与安慰剂+化疗组的OS率分别为62.9%和52.0%,24个月时分别为31.3%和17.2%。

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经独立审查委员会(IRC)评估,Adebrelimab+化疗的无进展生存期(PFS)为5.8月(95% CI 5.6-6.9),安慰剂+化疗为5.6 月(95% CI 5.5-5.7)(HR 0.67,95% CI 0.54-0.83);6月时PFS率为49.4% vs 37.3%,12月时为19.7% vs 5.9%。客观反应率(ORR)和反应持续时间(DoR)也有利于阿德雷利单抗+化疗组。

Adebrelimab+化疗组和安慰剂+化疗组的3级治疗相关不良事件发生率分别为85.7%和84.9%,两组最常见的不良事件(发生率≥5%)是血液学毒性。

这项研究表明,在化疗中加入Adebrelimab可显著改善OS,安全性可接受,这项试验的数据支持该联合治疗方案可作为ES-SCLC的一种新的一线治疗选择。

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