单药化疗耐药的滋养细胞肿瘤Avelumab 治疗安全有效

2021-01-23 太后殿下 张师前公众号

法国里昂You等报告,在单药化疗耐药的滋养细胞肿瘤(GTT)患者中,Avelumab具有良好的安全性,可治愈约50%的患者。Avelumab 可能是一种新的治疗选择,特别是对于拟联合化疗患者。(J C

法国里昂You等报告,在单药化疗耐药的滋养细胞肿瘤(GTT)患者中,Avelumab具有良好的安全性,可治愈约50%的患者。Avelumab 可能是一种新的治疗选择,特别是对于拟联合化疗患者。(J Clin Oncol. 2020年 7 月 27 日在线版 doi: 10.1200/JCO.20.00803.)

对单药化疗耐药的GTT患者可以接受其他化疗方案,虽然有效,也会引起相当大的毒副作用。所有GTT亚型均表达PD-L1, 而自然杀伤(NK)细胞参与滋养层免疫监视。Avelumab(抗PD-L1)诱导 NK 细胞介导的细胞毒性作用。TROPHIMMUN试验评估了Avelumab 在化疗耐药的GTT患者中的疗效。

此项期多中心试验(clinicaltrials.gov注册,编号NCT03135769)中,单药化疗后疾病进展的GTT患者每2周静脉注射Avelumab 10 mg/kg,直至人绒毛膜促性腺素(hCG)正常水平,然后进行 3 个疗程巩固治疗。主要终点是 hCG 正常化率(两步 Simon设计)。

2016年12月至2018年9月,共治疗15患者。中位年龄 34 岁;53.3%的患者疾病分期为期,46.7%为期。国际妇产科联盟(FIGO)评分为0~4者占33.3%,5~6分者占46.7%,≥ 7分者占20%。既往治疗包括甲氨蝶呤(100%)和放线菌素D(7%)。中位随访时间为25个月,Avelumab中位周期数为 8(2~11)。1~2 级与治疗相关的不良事件发生率为93%,最常见的是(≥ 25%)疲劳(33.3%),恶心/呕吐(33.3%)和输液相关的不良反应(26.7%)。1例患者发生3级子宫出血(与治疗无关)。

在Avelumab治疗中位9个周期后,8例(53.3%)患者的hCG正常,随后没有复发。正常化可能与疾病分期、FIGO 评分或基线hCG无关。随后1例患者健康妊娠。在Avelumab耐药的患者(46.7%)中,用放线菌素 D(42.3%)或联合化疗 / 手术(57.1%)可使hCG降至正常水平。

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