Nat Biotechnol:研究揭示肿瘤治疗新策略

2020-02-18 佚名 中国科学报

美国哈佛医学院 Mark Cobbold 研究组利用抗体介导的病毒表位向肿瘤传递特性,使用 CMV 特异性 T 细胞进行癌症治疗。相关论文日前在线发表于《自然—生物技术》。

美国哈佛医学院 Mark Cobbold 研究组利用抗体介导的病毒表位向肿瘤传递特性,使用 CMV 特异性 T 细胞进行癌症治疗。相关论文日前在线发表于《自然—生物技术》。

研究人员建立了一种免疫疗法,其中非癌抗原的内源性 T 细胞被重新靶向攻击肿瘤。该方法依赖于使用抗体—肽表位缀合物(APEC),将合适的抗原通过 HLA-1 递送至肿瘤表面。研究人员使用 APEC 对肿瘤杀伤性巨细胞病毒(CMV)特异性 CD8 + T 细胞重新标记,该 APEC 包含金属蛋白酶敏感的接头以及肿瘤靶向抗体偶联的 CMV 衍生抗原决定簇。

这些 APEC 在体外和小鼠癌症模型中重新定义了针对肿瘤细胞的已有 CMV 免疫。 在体外,APEC 可特异性激活效应 T 细胞的 CMV 反应,而双特异性 T 细胞衔接子可激活效应 T 细胞和调节性 T 细胞。

该方法可能为不适合检查点抑制剂或其他免疫疗法的癌症提供有效的替代治疗方案。

原始出处:

Millar, D.G., Ramjiawan, R.R., Kawaguchi, K. et al. Antibody-mediated delivery of viral epitopes to tumors harnesses CMV-specific T cells for cancer therapy. Nat Biotechnol (2020). https://doi.org/10.1038/s41587-019-0404-8

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    2020-06-23 cathymary
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    2020-06-05 shock_melon
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    2020-05-28 liye789132251
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    2020-03-07 sunylz
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