一个依赖激素的tRNA半部分通过破坏p21 mRNA的稳定性来促进细胞循环的进展
Takuya Kawamura1,2, Megumi Shigematsu1,2, Yohei Kirino1,2
1Computational Medicine Center, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania, United States of America.
PLoS biology
|June 5, 2025
概括
5'-tRNALysCUU的一半通过破坏p21 mRNA的稳定,促进前列腺癌细胞的增殖. 这个tRNA的一半取代YBX1蛋白,这是维持p21mRNA稳定性和调节细胞周期进展的关键因素.
科学领域:
- 分子生物学分子生物学
- 癌症研究 癌症研究
- 在RNA生物学,RNA生物学.
背景情况:
- tRNA的一半是大量的短非编码RNA.
- 它们在细胞过程中的调节作用越来越被认可.
研究的目的:
- 为了研究5'-tRNALysCUU半在雄激素受体阳性前列腺癌细胞的功能.
- 阐明这种tRNA半分子影响细胞增殖的分子机制.
主要方法:
- 在LNCaP细胞中5'-tRNALysCUU的一半的耗尽.
- 全球mRNA分析 (RNA-seq).
- 蛋白质-RNA相互作用试验 (例如体外结合试验).
主要成果:
- 5'-tRNALysCUU半耗尽抑制了细胞增殖和细胞周期进展.
- 耗尽导致p21mRNA水平增加,这是细胞循环抑制剂.
- YBX1蛋白与p21mRNA的3'-UTR中的特定位点 (LL588) 结合,使其稳定.
- 5'-tRNALysCUU的一半将YBX1从p21mRNA中移除,导致其不稳定.
结论:
- 5'-tRNALysCUU的一半通过破坏p21 mRNA的稳定,促进激素依赖癌症的细胞周期进展.
- 这种调节是通过YBX1蛋白直接结合和位移而发生的.
- 突出了涉及tRNA半径和mRNA稳定性的新型调节途径.
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