首页> 外文期刊>International journal of immunopharmacology >Low levels of ionic mercury modulate protein tyrosine phosphorylation in lymphocytes.
【24h】

Low levels of ionic mercury modulate protein tyrosine phosphorylation in lymphocytes.

机译:低水平的离子汞可调节淋巴细胞中的蛋白质酪氨酸磷酸化。

获取原文
获取原文并翻译 | 示例
           

摘要

The ability of ionic mercury to induce protein tyrosine phosphorylation in mouse spleen cells and in the mouse WEHI-231 B-cell lymphoma was investigated. We have confirmed previous studies which showed that exposure to high levels (several hundred microM) of mercury lead to very large increases in the level of protein tyrosine phosphorylation in these cell systems. However we have also demonstrated that low levels (in the order of 0.1 to 1.0 microM) of mercury also significantly upregulate protein tyrosine phosphorylation. Mercury induced protein tyrosine phosphorylation is inhibited by the mercury chelator penicillamine and by pretreating treating target cells with the sulfhydryl blocking reagent N-hydroxymaleimide. These results suggest that exposure to low levels of mercury could potentially interfere with lymphocyte signal transduction and so offer a possible explanation as to how mercury exposure could lead to immune cellular dysfunction. On a molecular level, the results suggest that the site(s) of action with respect to mercury dependent induction of protein tyrosine phosphorylation is likely a free disulfide group or groups located on the outer leaflet of the plasma membrane.
机译:研究了离子汞在小鼠脾细胞和小鼠WEHI-231 B细胞淋巴瘤中诱导蛋白质酪氨酸磷酸化的能力。我们已经证实了先前的研究,这些研究表明,暴露于高水平(几百microM)的汞会导致这些细胞系统中蛋白质酪氨酸磷酸化水平的大幅提高。但是,我们还证明了汞含量低(约0.1至1.0 microM)也显着上调了蛋白质酪氨酸的磷酸化。汞螯合剂青霉素胺和用巯基封闭剂N-羟基马来酰亚胺预处理处理靶细胞可抑制汞诱导的蛋白质酪氨酸磷酸化。这些结果表明,暴露于低水平的汞可能会干扰淋巴细胞信号转导,因此就汞暴露如何导致免疫细胞功能障碍提供了可能的解释。在分子水平上,结果表明,针对汞依赖性蛋白质酪氨酸磷酸化诱导的作用位点可能是位于质膜外小叶上的一个或多个游离二硫基团。

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