1317-铁离子驱动气道炎症中GSDMD的非蛋白酶激活 episode artwork

EPISODE · Jul 22, 2026 · 25 MIN

1317-铁离子驱动气道炎症中GSDMD的非蛋白酶激活

from 聊聊Sci

这项研究揭示了过敏性气道疾病中一种全新的致病机制。研究发现,当肺上皮细胞接触到过敏原(如尘螨或木瓜蛋白酶)时,会通过 PAR1 受体触发铁自噬过程,导致细胞内游离铁水平显著升高。这些铁离子随后由伴侣蛋白 PCBP2 直接传递给 GSDMD 蛋白,在其局部引发 Fenton 反应并产生羟基自由基。这种高度局限的氧化反应在不依赖常规蛋白酶的情况下,直接剪切并激活 GSDMD,形成的膜孔道进而促进促炎因子 IL-33 的释放。实验证明,通过铁螯合剂或基因敲除阻断这一“铁-GSDMD”通路,能有效抑制气道炎症。该发现不仅打破了 GSDMD 激活必须依赖蛋白酶的传统认知,还为哮喘等过敏性疾病提供了以细胞铁稳态为核心的新型治疗靶点。References:Chen S, Deng F, Peng B, et al. Iron drives protease-independent cleavage of gasdermin D in allergic airway diseases[J]. Cell, 2026.前往小宇宙评论区与主播互动

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1317-铁离子驱动气道炎症中GSDMD的非蛋白酶激活

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