Clin Cancer Res:PD1阻断可增强ICAM1靶向CAR T细胞对晚期甲状腺癌的治疗效果

2020-09-06 MedSci原创 MedSci原创

背景:晚期甲状腺癌,包括低分化和间变性甲状腺癌(ATC),是致命的恶性肿瘤,治疗选择有限。在早期临床试验中,大多数ATC患者对程序性死亡1 (PD1)封闭反应不良。有必要探索新的治疗方案。

背景:晚期甲状腺癌,包括低分化和间变性甲状腺癌(ATC),是致命的恶性肿瘤,治疗选择有限。在早期临床试验中,大多数ATC患者对程序性死亡1 (PD1)封闭反应不良。有必要探索新的治疗方案。

方法:Gray等检测了PD-L1和细胞间黏附分子1(ICAM1)在甲状腺肿瘤和ATC细胞系中的表达水平,并检测了PD1在甲状腺癌患者外周血T细胞中的表达水平。此外,还在ATC异种移植物模型上,研究了ICAM1靶向CAR T细胞和抗PD1抗体单用和联合治疗的肿瘤靶向效果和T细胞动力学。

结果:晚期甲状腺癌与肿瘤中ICAM1和PD-L1表达增加以及循环血中的CD8+ T细胞的PD1表达增加相关。ICAM1和PD-L1在ATC细胞系中的表达受IFNg-JAK2信号通路调控。由健康供体或患者T细胞产生的ICAM1-靶向CAR T细胞联合PD1阻断消除ICAM1表达性靶肿瘤细胞的活性较单用CAR T细胞更强。在小鼠模型中,PD1阻断可促进PD-L1高肿瘤克隆的清除、抑制CAR-T的过度扩增,从而快速清除肿瘤,延长生存时间。

总结:以互补的方式,靶向IFNg诱导性、肿瘤相关抗原-ICAM1和PD-L1或可成为控制晚期甲状腺癌的有效治疗策略。

原始出处:

Katherine D. Gray,et al. PD1 blockade enhances ICAM1-directed CAR T therapeutic efficacy in advanced thyroid cancer. Clinical Cancer Research. DOI: 10.1158/1078-0432.CCR-20-1523

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    2020-12-12 whmdzju
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    2020-09-07 14818eb4m67暂无昵称

    学习

    0

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    2020-09-07 内科新手

    谢谢梅斯提供这么好的信息,学到很多

    0

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    2020-09-07 CHANGE

    疗效只是效果的众多方面之一,还要看对患者的获益,包括生活质量等因素共同决定效果的

    0

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