首页> 外文期刊>Nature >Regulation of PDGF signalling and vascular remodelling by peroxiredoxin II
【24h】

Regulation of PDGF signalling and vascular remodelling by peroxiredoxin II

机译:过氧化物酶Ⅱ对PDGF信号转导和血管重塑的调节

获取原文
获取原文并翻译 | 示例
           

摘要

Platelet-derived growth factor ( PDGF) is a potent mitogenic and migratory factor that regulates the tyrosine phosphorylation of a variety of signalling proteins via intracellular production of H2O2 (refs 1 - 3). Mammalian 2-Cys peroxiredoxin type II ( Prx II; gene symbol Prdx2) is a cellular peroxidase that eliminates endogenous H2O2 produced in response to growth factors such as PDGF and epidermal growth factor(4); however, its involvement in growth factor signalling is largely unknown. Here we show that Prx II is a negative regulator of PDGF signalling. Prx II deficiency results in increased production of H2O2, enhanced activation of PDGF receptor ( PDGFR) and phospholipase Cγ 1, and subsequently increased cell proliferation and migration in response to PDGF. These responses are suppressed by expression of wild-type Prx II, but not an inactive mutant. Notably, Prx II is recruited to PDGFR upon PDGF stimulation, and suppresses protein tyrosine phosphatase inactivation. Prx II also leads to the suppression of PDGFR activation in primary culture and a murine restenosis model, including PDGF-dependent neointimal thickening of vascular smooth muscle cells. These results demonstrate a localized role for endogenous H2O2 in PDGF signalling, and indicate a biological function of Prx II in cardiovascular disease.
机译:血小板衍生生长因子(PDGF)是有效的促有丝分裂和迁移因子,可通过细胞内产生H2O2来调节多种信号蛋白的酪氨酸磷酸化(参考文献1-3)。 II型哺乳动物2-半胱氨酸过氧化物酶(Prx II;基因符号Prdx2)是一种细胞过氧化物酶,可消除因生长因子(如PDGF和表皮生长因子)而产生的内源性H2O2(4);然而,其在生长因子信号传导中的参与尚不清楚。在这里,我们显示Prx II是PDGF信号的负调节剂。 Prx II缺乏症导致H2O2产生增加,PDGF受体(PDGFR)和磷脂酶Cγ1的激活增强,以及随后响应PDGF的细胞增殖和迁移增加。这些反应被野生型Prx II的表达抑制,但没有失活的突变体被抑制。值得注意的是,Prx II在PDGF刺激后被募集到PDGFR,并抑制蛋白质酪氨酸磷酸酶失活。 Prx II还可以抑制原代培养和鼠再狭窄模型中PDGFR的激活,包括PDGF依赖性血管平滑肌细胞新内膜增厚。这些结果证明了内源性H2O2在PDGF信号传导中的局部作用,并表明Prx II在心血管疾病中的生物学功能。

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