1419-EFHD2驱动乳酸介导的大肠癌放射抗性研究 episode artwork

EPISODE · Aug 11, 2026 · 21 MIN

1419-EFHD2驱动乳酸介导的大肠癌放射抗性研究

from 聊聊Sci

本研究揭示了 hsa-let-7b-5p/EFHD2/乳酸代谢 轴在调节 结直肠癌 (CRC) 放射抗性 中的核心作用。研究发现,hsa-let-7b-5p 通过抑制 EFHD2 的表达来增强肿瘤的放射敏感性,而 EFHD2 则通过促进 DNA 损伤修复 和构建 免疫抑制微环境 导致放疗失效。在机制层面,EFHD2 与 HMGB1 相互作用并稳定 HIF-1α,进而增强乳酸代谢;其在 K9 位点的乳酸修饰 对招募 RAD51 和 RPA2 等关键修复因子至关重要。此外,由 EFHD2 驱动的乳酸积累通过诱导 M2 型巨噬细胞极化 和上调 PD-L1 表达,帮助肿瘤逃避免疫监视。通过单细胞和空间转录组学验证,联合抑制 EFHD2 与 免疫检查点阻断治疗 能显著逆转放射抗性并恢复抗肿瘤免疫反应。这些发现为结直肠癌的临床治疗提供了新的 生物标志物 和联合治疗策略。References:Yu Y, Wu H, Xiao Y, et al. EFHD2 drives lactate-mediated DNA damage repair and immunosuppression via HMGB1 and HIF-1α to confer radioresistance in colorectal cancer[J]. Cell Death & Disease, 2026.前往小宇宙评论区与主播互动

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1419-EFHD2驱动乳酸介导的大肠癌放射抗性研究

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