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SLAP通过UBE3C介导的非降解的mLST8ubiquitination来控制mTORC2的完整性,以抑制结直肠瘤发生
Rudy Mevizou1,2, Dana Naim1,2,3, Florent Cauchois1,3
1CRBM, Université de Montpellier, CNRS, Montpellier, France.
Cell death and differentiation
|December 15, 2025
概括
类似Src的适配蛋白 (SLAP) 通过调节mTORC2的完整性来抑制结直肠癌 (CRC). SLAP针对mLST8进行无处不在,抑制癌细胞生长和入侵,为CRC提供新的治疗策略.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 细胞信号传递 细胞信号传递
背景情况:
- 拉巴胺素复合体2 (mTORC2) 途径的机械性标与结直肠癌 (CRC) 细胞生长和迁移有关.
- mTORC2信号失调有助于CRC的瘤发生,但确切的机制尚不清楚.
研究的目的:
- 阐明Src-Like适配蛋白 (SLAP) 在调节mTORC2信号传递中的作用及其对CRC的影响.
- 确定SLAP在CRC中发挥其瘤抑制功能的分子机制.
主要方法:
- 研究了SLAP与mTORC2组件的相互作用,特别是mLST8.8.
- 利用无处不在的测试来检查mLST8.8的SLAP介导的修饰.
- 在SLAP-UBE3C-mLST8复合体中确定了E3泛基因酶UBE3C作为关键相互作用体.
- 评估了SLAP对CRC细胞增殖,入侵和异种移植瘤生长的功能影响.
- 评估了SLAP枯竭对CRC细胞对mTOR抑制剂敏感性的影响.
主要成果:
- SLAP与mLST8相互作用,促进其在特定的氨酸残留物 (K86,K215) 上的非降解性无化.
- 这种由UBE3C促进的SLAP的无处不在,减少了mTORC2的复杂完整性和下游的mTORC2-AKT信号传输.
- SLAP对CRC细胞生长和入侵的抑制取决于其抑制mTORC2信号传递的能力.
- 在CRC异种移植中,SLAP枯竭增加了mTORC2活性,并增强了对mTOR催化抑制剂的敏感性.
结论:
- 一个新的SLAP-UBE3C-mLST8轴调节mTORC2的完整性,在结直肠癌中发挥瘤抑制作用.
- SLAP对mTORC2的调节代表了结直肠癌治疗的潜在治疗标.
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