细胞聚合激活小GTPase Rac1并通过保持脂质的完整性来诱导CD44裂变
Dong Li1, Younhee Park1, Hami Hemati1
1Department of Toxicology and Cancer Biology, College of Medicine, University of Kentucky, Lexington, Kentucky, USA.
The Journal of biological chemistry
|October 22, 2023
概括
细胞聚合维持了脂质的完整性,防止了阿诺基斯并增强了癌细胞转移. 破坏脂质可以抑制CD44的分裂和Rac1的激活,这对癌症的发育和扩散至关重要.
科学领域:
- 细胞生物学 细胞生物学
- 癌症生物学 癌症生物学
- 分子瘤学分子瘤学
背景情况:
- 脂质是信号转导的关键膜领域.
- 细胞脱离细胞外基质 (ECM) 破坏脂质,诱导阿诺基斯并阻碍转移.
- 与单细胞相比,CD44介导的细胞聚合增强了癌细胞干细胞,存活率和转移潜力.
研究的目的:
- 为了研究脂质在CD44介导的细胞聚合中的作用.
- 为了确定脂质的完整性如何影响积过程中的癌细胞存活率和转移.
主要方法:
- 模仿细胞从ECM脱离,观察单细胞与聚合细胞的脂质行为.
- 评估Rac1激活,CD44裂变和CD44细胞内域 (CD44 ICD) 在具有维持或破坏脂质的聚合细胞中的生成.
主要成果:
- 脂质的完整性在聚合细胞中保持,但在单细胞脱离时被破坏.
- 在聚合细胞中保持脂质的完整性对于Rac1激活至关重要,防止瘤.
- 在聚合细胞的脂质中CD44和γ-分泌酶的同定位促进了CD44裂变和CD44ICD生成,增强了干性.
结论:
- 通过CD44介导的细胞聚合保持了脂质的完整性,这对于预防anoikis和促进转移至关重要.
- 通过脂质完整性通过CD44介导的细胞聚合调节的两个新途径被确定.
- 针对细胞聚合依赖的途径提供了一种潜在的治疗策略,以抑制循环瘤细胞 (CTC) 集群发起的转移.
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