Nat Med:肠道微生物组特征与CTLA-4和PD-1联合阻断治疗毒性相关

2021-07-13 xiaozeng MedSci原创

既往研究显示,

既往研究显示,针对CTLA-4和PD-1免疫检查点阻断联合疗法(CICB)与患者的高客观反应率相关,但很大一部分患者会经历免疫相关不良事件(irAE)。有趣的是,患者的临床反应率和irAE似乎相关,目前关于治疗毒性的相关分子机制尚不清楚。

因此,需要深入了解CICB治疗的相关生物标志物以及患者对CICB的反应和药物毒性相关机制。

为了解决上述问题,研究人员对77名接受CICB治疗的晚期黑色素瘤患者的血液、肿瘤组织和肠道微生物组进行了分析,并在临床前模型中进行了平行研究。

患者治疗反应的分子和免疫预测因子分析

结果显示,任何≥3级的免疫相关不良事件的发生率均很高(49%)。对CICB治疗反应的肿瘤相关免疫和基因组生物标志物与ICB单药治疗中所鉴定的生物标志物类似,且研究人员发现,CICB的毒性与更多样化的外周T细胞库相关。肠道微生物组分析显示,具有药物毒性反应的患者的肠道拟杆菌的丰度显著更高,在结肠炎患者样本和临床前模型中粘膜IL-1β的水平上调。

肠道微生物与CICB反应的关联性

总而言之,该研究结果为靶向CICB毒性提供了潜在的新治疗策略。


原始出处:

Andrews, M.C., Duong, C.P.M., Gopalakrishnan, V. et al. Gut microbiota signatures are associated with toxicity to combined CTLA-4 and PD-1 blockade. Nat Med (08 July 2021).

 

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    2021-10-28 liye789132251
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    2021-07-15 hywen7328
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    2021-07-14 期待第一篇SCI

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