1236-TEAD1冷凝物:癌症细胞中的非转录活性存储库 episode artwork

EPISODE · Jul 6, 2026 · 21 MIN

1236-TEAD1冷凝物:癌症细胞中的非转录活性存储库

from 聊聊Sci

本研究揭示了TEAD1转录因子在肾细胞癌(RCC)等癌症细胞中的一种独特存在形式,即形成的微米级生物分子凝聚体。与通常促进基因表达的转录凝聚体不同,这种TEAD1凝聚体定位在染色质的周着丝粒异染色质区域,且不具备转录活性。研究人员通过荧光恢复后光漂白(FRAP)等技术证实了其液态属性,并发现其形成高度依赖于TEAD1的DNA结合结构域与富集的MCAT基序之间的相互作用。实验结果表明,这些凝聚体实际上起到了储存仓库的作用,用于缓冲细胞内过剩的TEAD1,以防止其过度激活致癌信号。当这些凝聚体被破坏时,YAP与TEAD的靶基因表达会随之增加,这为理解Hippo信号通路的失调及肿瘤进展提供了全新的机械框架。该发现不仅挑战了转录因子凝聚体必然促进转录的传统观点,还为针对癌症的代谢稳态干预提供了潜在的新靶点。References:Wang Y, Liang J, Lange K S, et al. TEAD1 condensates are transcriptionally inactive storage sites on the pericentromeric heterochromatin in cancer cells[J]. Nature Cell Biology, 2026: 1-16.前往小宇宙评论区与主播互动

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1236-TEAD1冷凝物:癌症细胞中的非转录活性存储库

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