1349-靶向MDK胞外囊泡光免疫疗法重塑肿瘤基质与免疫环境 episode artwork

EPISODE · Jul 28, 2026 · 24 MIN

1349-靶向MDK胞外囊泡光免疫疗法重塑肿瘤基质与免疫环境

from 聊聊Sci

这项研究介绍了一种基于Midkine (MDK) 靶向的细胞外囊泡(EV)光免疫疗法平台,旨在攻克胰腺癌等实体瘤中的间质屏障。研究人员通过基因工程技术使囊泡表面表达高亲和力纳米抗体,并装载光敏剂 Ce6,使其能精准富集于肿瘤微环境。在近红外光照射下,该平台不仅能直接杀伤癌细胞并诱导免疫原性细胞死亡,还能重塑肿瘤相关成纤维细胞(CAFs),从而降低细胞外基质密度并改善血管灌注。此外,治疗引发的肿瘤细胞 DNA 释放激活了巨噬细胞中的 cGAS-STING 通路,将免疫抑制环境转变为促炎状态。实验证明,这种多维度的微环境重塑显著增强了化学疗法、免疫检查点阻断及过继性 T 细胞疗法的预后效果。这项成果为治疗具有致密间质结构的难治性肿瘤提供了一种极具潜力的临床转化方案。References:Qu C, Liu J, Cen J, et al. Targeted extracellular vesicle-photoimmunotherapy remodels stromal-immune microenvironment to boost chemo-immunotherapy in preclinical models[J]. Cell Reports Medicine, 2026.前往小宇宙评论区与主播互动

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1349-靶向MDK胞外囊泡光免疫疗法重塑肿瘤基质与免疫环境

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