通过Src的p27酸化调节了对环林E-Cdk2的抑制
Isabel Chu1, Jun Sun, Angel Arnaout
1Braman Family Breast Cancer Institute of the University of Miami Sylvester Comprehensive Cancer Center and Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, FL 33136, USA.
Cell
|January 27, 2007
概括
致癌酶Src降低了p27的稳定性,促进了细胞周期的进展. 抑制Src会增加p27水平,有可能恢复乳腺癌中他莫西芬的敏感性.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 细胞循环规则 细胞循环规则
背景情况:
- p27Kip1是G1细胞周期阶段的关键调节者.
- 致癌酶Src在癌症进展中起作用.
研究的目的:
- 研究Src在调节p27稳定性和功能的作用.
- 探索针对乳腺癌中Src的治疗潜力.
主要方法:
- 通过Src对p27的酸化位点分析.
- 在体外激酶测试中使用环林E-Cdk2复合物.
- 在Src过度表达和抑制细胞中分析p27水平.
- 人类乳腺癌样本的相关性研究.
- 在对Src抑制的反应中对他莫西芬敏感性的评估.
主要成果:
- 在素74和88的位置上,Src化了p27,降低了它的稳定性.
- Src的活动会损害p27抑制环林E-Cdk2.2的能力.
- Src过度表达加速p27蛋白解,而Src抑制剂增加p27的稳定性.
- Src激活与乳腺癌中p27水平降低相关.
- 抑制SRC可以恢复抗性细胞系中塔莫西芬的敏感性.
结论:
- 通过Src介导的p27酸化促进细胞周期的进展,并有助于乳腺癌.
- 用抑制剂向Src可能是乳腺癌的可行的治疗策略,特别是在抗 tamoxifen 的病例中.
相关概念视频
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01:23Negative Regulator Molecules
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