JAMA Oncol:抗肿瘤疫苗5T4联用环磷酰胺治疗转移性结直肠癌

2017-09-09 zhangfan MedSci原创

研究认为改良安卡拉痘苗-5T4联用低剂量的环磷酰胺可有效延长转移性结直肠癌患者生存期

免疫检查点抑制剂对大多数结直肠癌患者效果不佳,急需其他的治疗方法。研究发现癌胚抗原5T4在超过90%的转移性结直肠癌中高表达。近日研究人员考察了改良安卡拉痘苗-5T4 (MVA-5T4)以及小剂量低剂量的环磷酰胺对转移性结直肠癌的治疗效果。

研究招募了55名不能手术的转移性结直肠癌和标准化疗后病情稳定患者,随机分配至对照组(n=9)、环磷酰胺组(n=9)、MVA-5T4组(n=19)以及MVA-5T4联合环磷酰胺组(n=18)。患者接受50mg的环磷酰胺或1×1050%组织培养传染性剂量的MVA-5T4。研究的主要终点是抗5T4免疫响应,次要终点包括抗5T4免疫响应动力学、无进展生存期以及总生存期。

患者平均年龄64.2岁。研究发现MVA-5T4组以及联合治疗组的5T4特异性免疫响应显著高于其他组。环磷酰胺降低调节性T细胞浓度,独立的延长接受MVA-5T4患者的无进展生存期(5.0 vs 2.5个月,HR,0.48,95% ,CI,0.21-1.11)。MVA-5T4可成倍提高50%患者的免疫响应,延长患者无进展生存期(5.6 vs 2.4个月; HR, 0.21; 95% CI, 0.09-0.47)和总生存期(20.0 vs 10.3个月;HR, 0.32; 95% CI, 0.14-0.74)。治疗未发生3级以上不良事件。

研究认为改良安卡拉痘苗-5T4联用低剂量的环磷酰胺可有效延长转移性结直肠癌患者生存期。

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    2018-08-07 minlingfeng
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