首页> 外文期刊>American Journal of Physiology >Glycine-extended gastrin stimulates cell proliferation and migration through a Rho- and ROCK-dependent pathway, not a Rac/Cdc42-dependent pathway.
【24h】

Glycine-extended gastrin stimulates cell proliferation and migration through a Rho- and ROCK-dependent pathway, not a Rac/Cdc42-dependent pathway.

机译:甘氨酸延伸的胃泌素通过Rho和ROCK依赖性途径而非Rac / Cdc42依赖性途径刺激细胞增殖和迁移。

获取原文
获取原文并翻译 | 示例
           

摘要

Both amidated gastrin (Gamide) and glycine-extended gastrin (Ggly) stimulate gastrointestinal cell proliferation and migration. Binding of Gamide to the cholecystokinin-2 receptor activates small GTP-binding proteins of the Rho family (Rho, Rac, and Cdc42), and dominant-negative mutants of Rho or Cdc42 block Gamide-stimulated cell proliferation and survival. In comparison, little is known about the Ggly signaling transduction pathway leading to cell proliferation and migration. The present study examined the roles of the small G proteins Rho, Rac, and Cdc42 in Ggly-induced proliferation and migration of the mouse gastric epithelial cell line IMGE-5. Ggly stimulated the activation of Rho and its downstream effector protein ROCK. The activation of Rho and ROCK mediated Ggly-induced cell proliferation and migration as inhibition of Rho by C3, or ROCK by Y-27632, completely blocked these effects of Ggly. Ggly also stimulated tyrosine phosphorylation of focal adhesion kinase, and stimulation was reversed byaddition of C3 and Y-27632. In contrast to the effects of Rho and ROCK, inhibition of the Rac or Cdc42 pathways by expression of dominant-negative mutants of Rac or Cdc42 did not affect Ggly-induced cell proliferation and migration. These results demonstrate that Ggly stimulates IMGE-5 cell proliferation and migration through a Rho/ROCK-dependent pathway but not via Rac- or Cdc42-dependent pathways.
机译:酰胺化胃泌素(Gamide)和甘氨酸延伸的胃泌素(Ggly)都刺激胃肠细胞的增殖和迁移。酰胺与胆囊收缩素2受体的结合激活了Rho家族的小GTP结合蛋白(Rho,Rac和Cdc42),Rho或Cdc42的显性负突变体阻断了Gamide刺激的细胞增殖和存活。相比之下,关于导致细胞增殖和迁移的Ggly信号转导途径的了解很少。本研究检查了小G蛋白Rho,Rac和Cdc42在Ggly诱导的小鼠胃上皮细胞系IMGE-5增殖和迁移中的作用。 Ggly刺激Rho及其下游效应蛋白ROCK的激活。 Rho和ROCK的激活介导Ggly诱导的细胞增殖和迁移,因为C3抑制Rho或Y-27632抑制ROCK,完全阻断了Ggly的这些作用。 Ggly还刺激了粘着斑激酶的酪氨酸磷酸化,并且通过添加C3和Y-27632逆转了刺激。与Rho和ROCK的作用相反,通过表达Rac或Cdc42的显性负突变体抑制Rac或Cdc42途径不会影响Ggly诱导的细胞增殖和迁移。这些结果表明,Ggly通过Rho / ROCK依赖性途径刺激IMGE-5细胞增殖和迁移,而不是通过Rac或Cdc42依赖性途径刺激。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号