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JAMA:Ipilimumab对于人乳头瘤相关的转移或复发性宫颈癌疗效如何?

2017-11-22 MedSci MedSci原创

众所周知人类乳头状病毒(HPV)与宫颈癌的发生密切相关。目前基于HPV诱导免疫逃避的证据,免疫治疗可能是宫颈癌有力的治疗策略。Ipilimumab是一个完全的人源化单克隆抗体,可以阻断细胞毒性T淋巴细胞抗原-4(CTLA-4),其作用是下调T细胞免疫应答。近日在JAMA Oncology上发表的一篇文章则评估的在复发性宫颈癌中Ipilimumab的安全性和抗肿瘤活性。

众所周知人类乳头状病毒(HPV)与宫颈癌的发生密切相关。目前基于HPV诱导免疫逃避的证据,免疫治疗可能是宫颈癌有力的治疗策略。Ipilimumab是一个完全的人源化单克隆抗体,可以阻断细胞毒性T淋巴细胞抗原-4(CTLA-4),其作用是下调T细胞免疫应答。近日在JAMA Oncology上发表的一篇文章则评估的在复发性宫颈癌中Ipilimumab的安全性和抗肿瘤活性。

研究人员针对转移性宫颈癌(鳞状细胞癌或腺癌)、至少一次铂类化疗后的患者设计了一项多中心试验。在安全队列中6例患者使用了ipilimumab3mg/kg,每21天4个周期,其次为ipilimumab的II期研究,10mg/kg,每21天4周期,然后为每12周4周期的维持治疗,使患者表现出影像学上的缓解或稳定。治疗前、治疗后及2周期后7天对外周血进行免疫相关研究。主要的终点为安全性及客观反应率,对血及肿瘤组织进行免疫分析。

研究共纳入42例(中位年龄,49岁;范围,23-78岁)女性患者(29 [ 69% ]宫颈鳞状细胞癌和腺癌13 [ 31% ];37/40 [ 93% ] 例有组织可供分析确认了HPV阳性;2例没有档案组织)。结果显示3级中毒包括腹泻4例,其中3例结肠炎。34例用于评估最佳反应(实体瘤反应评价标准1.1版)中,1例患者部分缓解,10例患者病情稳定。中位无进展生存期和总体生存率分别为2.5个月(95% CI,2.1-3.2个月)和8.5个月(95% CI,3.6-未达到;1的患者还活着)。肿瘤内预处理CD3、CD4、CD8、FoxP3、吲哚胺2,3-双加氧酶和程序性细胞死亡配体1(PD-L1)的表达并不能预测获益,也没有随着治疗而有明显改变。对外周淋巴细胞的多色流式细胞仪检测显示出在初始治疗中,治疗依赖型的诱导T细胞共刺激分子、人类白细胞抗原D相关、PD-1的增加,而在维持治疗时恢复至基线水平。

由上述研究可以发现Ipilimumab在该人群中耐受性良好但并未表现出明显的单剂效应。抗CTLA-4的治疗诱导出免疫改变,但与临床效用并不相关。这些标记去的变化可能或指导进一步的治疗策略。

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    2017-12-18 snf701207
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    2017-11-24 一闲

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