...
首页> 外文期刊>Biochemistry >EVIDENCE FOR THE DISTINCT VANADYL(+4)-DEPENDENT ACTIVATING SYSTEM FOR MANIFESTING INSULIN-LIKE EFFECTS
【24h】

EVIDENCE FOR THE DISTINCT VANADYL(+4)-DEPENDENT ACTIVATING SYSTEM FOR MANIFESTING INSULIN-LIKE EFFECTS

机译:证据证明与钒类似的离散(+4)活性系统表现出类似胰岛素的作用

获取原文
获取原文并翻译 | 示例
           

摘要

Both exogenously added vanadate (oxidation state +5) and vanadyl (oxidation state +4) mimic the rapid responses of insulin through alternative signaling pathways, not involving insulin receptor activation [reviewed in Shechter et al. (1995) Mal. Cell. Biochem. 153, 39-47]. Vanadium exhibits complex chemistry, fluctuating between vanadate(+5) and vanadyl(+4), according to the prevailing conditions. Using seral experimental approaches, we report here on a distinct vanadate(+5)-independent, vanadyl(+4)-dependent activating pathway. The key components of this pathway are membrane protein phosphotyrosine phosphatases (PTPases) and a cytosolic (nonreceptor) protein-tyrosine kinase (CytPTK). We further suggest that vanadate(+5) is not reduced rapidly to vanadyl(+4) inside the cell, and entered vanadyl sulfate(+4) is capable of undergoing spontaneous: oxidation to vanadate(+5) in vivo. Finally, we show that the promotion and full expression of a downstream bioeffect such as lipogenesis requires both activation of CytPTK and prolonged stability of vanadyl(+4) against oxidation.
机译:外源添加的钒酸盐(氧化态+5)和钒基(氧化态+4)都通过替代的信号传导途径模拟胰岛素的快速反应,但不涉及胰岛素受体的激活[Shechter等,综述。 (1995)Mal。细胞。生化。 153,39-47]。钒表现出复杂的化学性质,根据主要条件,钒酸盐(+5)和钒基(+4)之间波动。使用血清实验方法,我们在这里报告了一个独立的钒酸盐(+5)独立,钒基(+4)依赖性激活途径。该途径的关键成分是膜蛋白磷酸酪氨酸磷酸酶(PTPases)和胞质(非受体)蛋白酪氨酸激酶(CytPTK)。我们进一步建议钒酸盐(+5)不会迅速还原为细胞内的钒(+4),而进入的硫酸钒(+4)能够自发地发生氧化:体内氧化为钒酸盐(+5)。最后,我们表明下游生物效应(如脂肪生成)的促进和完整表达既需要CytPTK的激活,又需要vanadyl(+4)的抗氧化稳定性。

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