TCTP通过细胞间囊泡信号传递来调节基因毒性压力和瘤性
Robert Amson1, Andrea Senff-Ribeiro1, Teele Karafin1
1Institut Gustave Roussy (IGR), Unité Inserm U981, Bâtiment B2M, 114 rue Édouard-Vaillant, 94805, Villejuif, France.
翻译控制的瘤蛋白 (TCTP) 对于癌细胞通过细胞外囊泡 (EV) 进行通信至关重要. 抑制TCTP可降低瘤生长,并改善小鼠的存活率,突出其在瘤信号传递中的作用.
科学领域:
- 细胞生物学 细胞生物学
- 分子瘤学分子瘤学
- 癌症研究 癌症研究
背景情况:
- 细胞外囊泡 (EVs) 在癌症中调解细胞间信号,但它们的调节机制尚不清楚.
- 转化控制的瘤蛋白 (TCTP) 存在于EV中,可能会影响癌症的进展.
研究的目的:
- 调查TCTP在基因毒性压力信号和恶性转变中的作用.
- 阐明TCTP调节癌症中EV介导信号的机制.
主要方法:
- 生成了一个Tctp诱导的淘汰赛鼠标模型 (Tctp-/f-).
- 使用TCTP敲除的人类乳腺癌细胞.
- 来自Trp53-/-;Tctp-/f-双变异小鼠的瘤细胞.
- 给Trp53-/-小鼠使用了塞特拉林.
主要成果:
- 对于通过小EV (sEV) 发出基因毒性压力诱导的亡信号,TCTP至关重要.
- 通过TCTP Knockdown,破坏了EV的分泌,并减少了乳腺癌细胞中sEV依赖的恶性生长.
- Trp53-/-;Tctp-/f-小鼠表现出显著降低的瘤发生性和延长的生存时间.
- 塞特拉林治疗增加了Trp53-/-小鼠的存活率.
- TCTP与DDX3结合,从而促进RNA和miRNA在SEVs中的招募.
结论:
- TCTP是sEV介导的细胞间通信在细胞亡和瘤发生的关键调节者.
- 向TCTP代表了癌症治疗的潜在治疗策略.
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