1179-法尼基化驱动的KRAS相分离促进结肠肿瘤生长 episode artwork

EPISODE · Jun 24, 2026 · 22 MIN

1179-法尼基化驱动的KRAS相分离促进结肠肿瘤生长

from 聊聊Sci

这项研究揭示了KRAS蛋白通过液-液相分离(LLPS)形成细胞质凝聚体的新机制,该机制显著促进了结肠癌的生长。研究发现,KRAS在C185位点的法尼酰化修饰是驱动这种相分离的关键因素,且凝聚体水平与癌症的分期和不良预后呈正相关。在功能上,这些凝聚体通过招募RCE1酶来加速KRAS的后续加工与胞膜转运,从而放大致癌信号通路。通过对FDA批准药物的筛选,研究确认他汀类药物(如匹伐他汀)能有效抑制法尼酰化并破坏KRAS凝聚体,进而抑制肿瘤生长。此外,阻断KRAS相分离不仅能产生抗癌效果,还能显著增强肿瘤对G12C抑制剂(如AMG 510)的治疗敏感性,为克服耐药性提供了潜在方案。References:Wang X, Zhang Y, Lu M, et al. Farnesylation-driven KRAS phase separation promotes colon tumor growth[J]. Cell, 2026.前往小宇宙评论区与主播互动

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1179-法尼基化驱动的KRAS相分离促进结肠肿瘤生长

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