NEJM:Nivolumab联合Ipilimumab用于晚期黑素瘤疗效优于单药治疗

2015-04-22 姜英浩 MedSci原创

Ipilimumab是阻断另一个免疫检查点CTLA-4的单克隆抗体。在前期的一项剂量扩大的1期临床研究中,研究人员发现采用Nivolumab与Ipilimumab联合阻断T细胞免疫检查点治疗晚期黑素瘤患者时能够产生很高的应答率。

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Nivolumab是一种与PD-1受体相结合并阻断其与PD-L1PD-L2的相互作用的单克隆抗体,用于黑素瘤等多种肿瘤的抗肿瘤免疫应答研究中。Ipilimumab是阻断另一个免疫检查点CTLA-4的单克隆抗体。在前期的一项剂量扩大的1期临床研究中,研究人员发现采用NivolumabIpilimumab联合阻断T细胞免疫检查点治疗晚期黑素瘤患者时能够产生很高的应答率。因此,在2015420NEJM杂志上在线发表的一篇论文中,作者对后续的2期临床试验结果进行了报道。

在这项双盲的2期临床试验中,研究人员招募了142例未接受过治疗的转移性黑素瘤患者,按2:1将患者随机分配至联合组与单药组,联合组给予Nivolumab1 mg/kg体重)与Ipilimumab3 mg/kg体重),单药组给予ipilimumab与安慰剂联用,每31次,服用4个剂量后继续分别给予每21次的Nivolumab3 mg/kg体重)或安慰剂直至疾病进展或严重毒性反应出现。主要终点事件是研究者评估的BRAF基因野生型肿瘤患者的客观应答率

结果显示,在BRAF基因野生型肿瘤患者中,联用组的客观应答率为61 %44/72),而单药组仅为11 %4/37(P<0.001),联用组有16例产生了完全应答(22 %),单药组无人。各组均未达到中位反应期,联用组未达到中位无进展生存期,而单药组中位无进展生存期为4.4个月(HR0.40; 95% CI, 0.23-0.68; P<0.001)。在33例出现BRAF基因突变的肿瘤患者中以上两项数据结果类似。联用组有54 %的患者出现3-4级药物相关毒性反应,而单药组仅有24 %。该数据与前期1期临床试验结果相似,并且多数毒性反应在给予免疫调节药物后可以缓解。

因此研究人员认为,当采用NivolumabIpilimumab联合治疗晚期黑素瘤时,患者客观应答率与无进展生存期均优于Ipilimumab单药治疗。并且联合治疗的安全性是可以接受的。

临床注册号:NCT01927419

原文出处:

Michael A. Postow, Jason Chesney, Anna C. Pavlick, et al. Nivolumab and Ipilimumab versus Ipilimumab in Untreated Melanoma. NEJM. 2015.4.20.

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    2015-05-30 snf701207
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    2016-03-14 tamgche
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