1005-活化T细胞胞外囊泡DNA增强抗肿瘤免疫 episode artwork

EPISODE · May 20, 2026 · 18 MIN

1005-活化T细胞胞外囊泡DNA增强抗肿瘤免疫

from 聊聊Sci

这项研究揭示了活化T细胞分泌的外泌体(ATEVs)如何通过一种新型的细胞间通讯机制增强抗原处理与呈递(APP),从而提升抗肿瘤免疫力。研究发现,ATEVs 携带丰富的双链基因组DNA,这些DNA片段富含免疫相关基因,能够直接转移至树突状细胞和肿瘤细胞的细胞核内。格兰酶B(Gzmb)在这一过程中起到了关键作用,它负责破坏受体细胞的核膜,使外泌体中的DNA得以进入核内进行瞬时转录和表达。通过这种非病毒基因传递方式,ATEVs 能够诱导原本处于“免疫沉默”状态的肿瘤重新表达MHC分子,显著改善肿瘤的免疫原性。实验证明,ATEVs 作为一种无细胞免疫疗法,能有效克服肿瘤的免疫逃逸,并与**免疫检查点阻断(如anti-PD1)**产生协同效应。这种天然的免疫增强过程为治疗乳腺癌、胰腺癌及脑胶质瘤等难治性癌症提供了新的策略。References:Hu M, Liu D A, Wortzel I, et al. Activated T cell extracellular vesicle DNA transfer enhances antigen presentation and anti-tumor immunity[J]. Cancer Cell, 2026.前往小宇宙评论区与主播互动

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1005-活化T细胞胞外囊泡DNA增强抗肿瘤免疫

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