1374-三羧酸循环重塑调控多能性退出与表观遗传 episode artwork

EPISODE · Aug 2, 2026 · 14 MIN

1374-三羧酸循环重塑调控多能性退出与表观遗传

from 聊聊Sci

这项研究揭示了在小鼠胚胎植入及其离开原始多能性的过程中,三羧酸(TCA)循环并非简单地关闭,而是经历了复杂的时空重布。研究发现,丙酮酸循环作为关键的代谢枢纽,通过丙酮酸羧化酶和苹果酸酶的协同作用,确保了细胞向定型多能性的及时转换与分化。出乎意料的是,谷氨酰胺而非葡萄糖,成为了组蛋白乙酰化的主要碳源,这一过程依赖于IDH1介导的还原性羧化作用。这种代谢重布将营养利用程序与表观遗传调节直接联系起来,对于维持胚胎发育的进程至关重要。通过结合同位素示踪与空间代谢组学技术,作者展示了代谢流如何精确调控细胞命运的转变。总之,该成果定义了多能性转换过程中代谢与染色质状态之间功能耦合的新机制。References:Kafkia E, Pladevall-Morera D, Argemi-Muntadas L, et al. TCA cycle rewiring underpins histone acetylation sourcing and cell-fate transitions during exit from naive pluripotency[J]. Cell Stem Cell, 2026, 33(5): 820-836. e9.前往小宇宙评论区与主播互动

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1374-三羧酸循环重塑调控多能性退出与表观遗传

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