1354-慢性压力介导的肠道菌群与肿瘤微环境重塑 episode artwork

EPISODE · Jul 29, 2026 · 24 MIN

1354-慢性压力介导的肠道菌群与肿瘤微环境重塑

from 聊聊Sci

这项研究揭示了慢性压力如何通过一种复杂的“肠道-噬菌体-成纤维细胞-B细胞”跨界回路加速肿瘤生长。研究发现,长期压力会破坏肠道屏障,导致肠道中的鸡肠球菌 (Eg) 转移至肿瘤部位。在肿瘤内部,这种细菌释放的噬菌体DNA通过TLR9受体激活肿瘤相关成纤维细胞,诱导其产生局部糖皮质激素。这些激素直接作用于B细胞,抑制了关键的生发中心B细胞反应和抗肿瘤抗体的产生。通过靶向TLR9或清除瘤内特定细菌,可以有效恢复免疫功能并抑制肿瘤进展。该成果为通过调节微生物群和阻断压力信号来增强癌症免疫治疗提供了新策略。References:Bashir H, Sanidad K Z, Ravisankar P, et al. Chronic stress unleashes an intratumor phage-fibroblast-B cell circuit to promote tumor growth[J]. Cancer Cell, 2026.前往小宇宙评论区与主播互动

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1354-慢性压力介导的肠道菌群与肿瘤微环境重塑

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