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Nat Commun:T细胞耗竭特征可预测ER阳性乳腺癌的免疫治疗反应

2021-06-06 MedSci原创 MedSci原创

对免疫疗法的反应在雌激素受体(ER)阳性乳腺癌中并不常见,而且到目前为止,缺乏预测性标记。近日,这项随机II期研究以检查点抑制剂治疗的ER阳性乳腺癌患者为主要终点,定义了表观遗传引物的安全性和反应率,

免疫疗法的反应在雌激素受体(ER)阳性乳腺癌中并不常见,而且到目前为止,缺乏预测性标记。近日,这项随机II期研究以检查点抑制剂治疗的ER阳性乳腺癌患者为主要终点,定义了表观遗传引物的安全性和反应率,并表征了PD-L1调节和T细胞免疫特征,研究结果已发表于Nat Commun。

结果,34名患者接受了伏立诺他、他莫昔芬和派姆单抗的治疗,之前接受了中位数为5种的转移性治疗方案后没有出现过度毒性反应。客观反应为4%,临床获益率(CR + PR + SD > 6 m)为19%。在5/5名临床获益患者的肿瘤或血液中观察到T细胞耗竭(CD8+ PD-1+/CTLA-4+)和治疗引起的调节性T细胞耗竭(CD4+ Foxp3+/CTLA-4+),但只有一名非反应者。肿瘤淋巴细胞浸润率为0.17%。只有两个非反应者的PD-L1表达量大于1%。

综上所述,该研究数据定义了PD-L1阴性ER阳性乳腺癌患者的新型免疫特征,这些患者更有可能从免疫检查点和组蛋白去乙酰化酶抑制中获益(NCT02395627)。

 

原始出处:

 

Manuela Terranova-Barberio, et al., Exhausted T cell signature predicts immunotherapy response in ER-positive breast cancer. Nat Commun. 2020 Jul 17;11(1):3584. doi: 10.1038/s41467-020-17414-y.

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    2021-07-23 liuli5079
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    2021-10-05 liye789132251

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