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RhoC GTPase Activation Assay
Published on: August 22, 2010
通过PI,Cdc42和Rac1诱导了因特林介导的细胞机动性和侵入性
P J Keely1, J K Westwick, I P Whitehead
1Department of Pharmacology, Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill 27599-7365, USA. pkeely@med.unc.edu
Nature
|December 24, 1997
概括
乳腺上皮细胞中Cdc42和Rac1的激活会破坏细胞两极分化,并促进细胞的入侵. 这个过程需要酸-3-OH激酶 (PI(3) K) 信号传导,而不是其他途径,突出PI(3) K.
科学领域:
- 细胞生物学 细胞生物学
- 癌症研究 癌症研究
- 分子生物学分子生物学
背景情况:
- 乳腺上皮细胞转化为侵入性癌症涉及改变的整合素-ECM相互作用.
- 动氨酸细胞骨的变化表明Cdc42和Rac GTPases在细胞运动性和入侵中的作用.
- 在上皮细胞中Cdc42和Rac1的特定作用,特别是关于整合素介导事件的具体作用,仍然不清楚.
研究的目的:
- 研究Cdc42和Rac1激活在乳腺上皮细胞两极化,运动性和入侵中的作用.
- 确定Cdc42和Rac1下游的信号通路,这些信号通路调解这些细胞变化.
主要方法:
- 在乳腺上皮细胞中激活Cdc42和Rac1,这些细胞是在原基质基质中培养的.
- 评估细胞的两极化,运动性和侵入性.
- 药理上抑制各种信号激酶,包括PAK,JNK,p70S6激酶,Rho,和酸-3-OH激酶 (PI(3) K).
主要成果:
- Cdc42和Rac1的激活破坏了正常的上皮细胞两极分化,促进了运动性和入侵性.
- 这种运动性取决于酸-3-OH激酶 (PI(3) K) 的激活,但不取决于PAK,JNK,p70 S6激酶或Rho.
- 直接的PI(3)K激活模仿了Cdc42/Rac1的影响,诱导偏振损失,运动性和入侵性.
结论:
- 激活Cdc42和Rac1是乳腺上皮细胞入侵和极化丧失的关键驱动因素.
- 酸丁醇-3-OH激酶 (PI(3) K) 是Cdc42/Rac1诱导的运动和侵入的关键下游媒介.
- PI(3) K信号影响着actin组织,从而调节乳腺上皮细胞中的细胞运动性和侵入性.
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