针对Skp2抑制了通过Arf-p53独立的细胞衰老来抑制瘤形成
Hui-Kuan Lin1, Zhenbang Chen, Guocan Wang
1Cancer Biology and Genetics Program, Sloan-Kettering Institute, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, New York 10021, USA.
Nature
|March 19, 2010
概括
Skp2 E3-ubiquitin结合酶不活化触发了独立于p19(Arf) -p53通路的强大的瘤抑制衰老. 这表明Skp2抑制是潜在的癌症预防和治疗策略.
科学领域:
- 在瘤学瘤学.
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
背景情况:
- 细胞衰老反对瘤的启动和促进.
- 衰老通常与p19 ((Arf) -p53通路有关.
- Skp2 E3-ubiquitin结合酶充当原瘤基因,在癌症中经常过度表达.
研究的目的:
- 为了研究Skp2在衰老诱导中的作用.
- 为了探索Skp2独立的衰老路径.
- 评估Skp2抑制作为癌症治疗策略.
主要方法:
- 在小鼠和细胞中Skp2的遗传失活化.
- 诱导瘤性压力和瘤抑制基因失活.
- 对衰老标志物和信号通路的分析 (p19(Arf) -p53,Atf4,p27,p21).
- 用Skp2-SCF复合体抑制剂进行治疗.
主要成果:
- 单独的Skp2无活化不会诱导衰老,但在瘤性压力或瘤抑制剂损失下会增强衰老.
- 依赖于Skp2的衰老绕过p19(Arf) -p53路径和DNA损伤,依赖于Atf4,p27和p21.
- 基因Skp2不活化会诱导衰老,即使p19(Arf) -p53受损.
- 在临床前模型中,Skp2抑制会触发衰老和瘤回归.
结论:
- Skp2在调节衰老方面发挥着至关重要的作用,特别是在致癌性压力下.
- 准Skp2为癌症提供了一个新的治疗途径.
- 药理上抑制Skp2在癌症预防和治疗方面表现有前途.
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