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JCI:Dinaciclib诱导免疫原性细胞死亡并增强PD-1抗体介导的肿瘤抑制

2018-02-26 MedSci MedSci原创

免疫检查点(PD-1)抑制剂已经在治疗癌症的临床上中显示出了巨大的成功,然而,大多数肿瘤对PD-1抗体的单一疗法具有抗性。许多正在进行的联合治疗研究揭示出PD-1抗体与其他治疗药物的相互补充可能产生更好的效果。

免疫检查点(PD-1)抑制剂已经在治疗癌症的临床上中显示出了巨大的成功,然而,大多数肿瘤对PD-1抗体的单一疗法具有抗性。许多正在进行的联合治疗研究揭示出PD-1抗体与其他治疗药物的相互补充可能产生更好的效果。

最近的研究发现免疫原性细胞死亡(ICD)能够改善不同肿瘤的T细胞应答,因此表明ICD可以进一步增强由PD-1抗体介导的抗肿瘤免疫性。在此,研究人员在免疫活性小鼠肿瘤模型中观察到PD-1抗体和细胞周期蛋白依赖性激酶抑制剂Dinaciclib的联合使用显示出了叠加的抗肿瘤活性。 Dinaciclib在肿瘤细胞内诱导了IIFN基因的表达,导致Dinaciclib通过激发ICD来增强PD-1抗体的作用。事实上,用Dinaciclib治疗的肿瘤细胞显示出了多种ICD的特征,包括表面钙网蛋白的表达和高迁移率族蛋白1HMGB1)和ATP的释放。用PD-1抗体和Dinaciclib治疗的小鼠在肿瘤内显示出了增加的T细胞浸润和DC激活,表明这种组合提高了免疫应答的总体质量。这些发现确定了DinaciclibPD-1抗体的联合应用的潜在机制,其中Dinaciclib能够诱导ICD,从而将肿瘤细胞转化为内源性疫苗并增强PD-1抗体的作用。 

原始出处:

Hossain, Dewan Md Sakib, et al. "Dinaciclib induces immunogenic cell death and enhances anti–PD-1–mediated tumor suppression." The Journal of clinical investigation 2018 128.2 doi:10.1172/JCI94586.

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