JAMA Oncology:肉瘤中PD-1靶向药物,巨噬细胞浸润和IDO通路活化的作用

2018-01-13 MedSci MedSci原创

使用免疫疗法治疗肉瘤有很有力的理论基础。JAMA Oncology近期发表了一篇文章,评估PD-1靶向联合规律化疗治疗肉瘤的有效性和安全性

使用免疫疗法治疗肉瘤有很有力的理论基础。JAMA Oncology近期发表了一篇文章,评估PD-1靶向联合规律化疗治疗肉瘤的有效性和安全性。

该研究有4个队列的晚期软组织肉瘤患者,包括平滑肌肉瘤(LMS),未分化多形性肉瘤(UPS),其他肉瘤和胃肠道间质瘤(GIST)。所有的患者均接受50mg每天2次环磷酰胺,治疗1周间隔1周,每3周接受Pembrolizumab静脉治疗。研究的主要终点是LMS,UPS和其他肉瘤的6个月无进展情况和客观反映情况以及GIST6个月无进展情况。客观反应率20%和/或6个月无进展率60%被认为是治疗有意义。从2015年6月到2016年7月,57例患者纳入研究。50例患者可以进行评估。3例患者出现肿瘤缩小。LMS,UPS和其他肉瘤6个月无进展率为0%,0%和14.3%,GIST为11.1%。最常见的不良反应是1或2级虚弱,腹泻和贫血。唯一1例出现部分反应的患者为唯一1例免疫细胞染色PD-L1强阳性的患者。在绝大部分病理中均观察到表达抑制性酶IDO1的巨噬细胞浸润。此外,在治疗过程中发现患者血清中犬尿氨酸/色氨酸比值显着升高。

文章最后认为,在软组织肉瘤和GIST中PD-1抑制剂抗肿瘤活性有限。可能的原因是巨噬细胞浸润和IDO1通路活化导致的免疫抑制性肿瘤微环境。

原始出处:
Maud Toulmonde,Nicolas Penel,et al.Use of PD-1 Targeting,Macrophage Infiltration,and IDO Pathway Activation in Sarcomas.JAMA Oncology.January 2018 doi:10.1001/jamaoncol.2017.1617

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    2018-05-18 tongyongming
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    2018-12-11 minlingfeng
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    2018-01-14 changjiu

    学习一下谢谢

    0

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    2018-01-13 131****1460

    学习了受益匪浅

    0

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