1591-哺乳动物免疫中的功能性嵌合mRNA episode artwork

EPISODE · Sep 19, 2026 · 25 MIN

1591-哺乳动物免疫中的功能性嵌合mRNA

from 聊聊Sci

这篇科研文献揭示了哺乳动物免疫系统中一种全新的蛋白质多样化机制,即功能性嵌合mRNA(chRNAs)的产生。研究人员通过先进的长读段直接RNA测序技术发现,在巨噬细胞发生炎症反应时,原本位于不同染色体上的基因会在CTCF蛋白的介导下发生空间接触,进而通过反式剪接融合形成新的转录本。其中最关键的发现是Gsdmd-Tmem106a嵌合蛋白,它由孔道形成蛋白GSDMD与TMEM106A的异位翻译序列融合而成。实验证明,该嵌合蛋白能定位于细胞质膜,与常规GSDMD协同作用,显著增强炎症小体介导的孔道形成和IL-1β释放。在临床意义上,这种嵌合蛋白在抗菌防御中发挥保护作用,但同时也会加剧败血症的致死性。这一发现打破了“一个基因对应一个蛋白质”的传统认知,证明了受控的转录融合是调节哺乳动物免疫和炎症反应的重要生理机制。References:Venezia O, Kane H, Du G, et al. Functional chimeric mRNAs encode proteins in mammalian immunity[J]. Nature, 2026: 1-10.前往小宇宙评论区与主播互动

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1591-哺乳动物免疫中的功能性嵌合mRNA

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