首页> 外文会议>ASMS Conference on Mass Spectrometry and Allied Topics >Multiplex Quantitation of Reversible Cysteine Oxidation in Mouse Heart: Effects of Catalase Overexpression and Type-2 Diabetogenic Diet
【24h】

Multiplex Quantitation of Reversible Cysteine Oxidation in Mouse Heart: Effects of Catalase Overexpression and Type-2 Diabetogenic Diet

机译:鼠标心脏可逆半胱氨酸氧化的多重定量:过氧化氢酶过表达和2型糖尿病饮食的影响

获取原文

摘要

Diet-induced obesity is associated with metabolic heart disease (MHD). Mice fed a high fat and high sucrose (HFHS) diet developed myocardial hypertrophy and diastolic dysfunction. MHD is associated with increased oxidative stress in the myocardium, as determined by increased nitrotyrosine and hydroxynonenal protein adducts. Cardiac-specific overexpression of catalase (CatTG), an enzyme that decomposes intracellular hydrogen peroxide, decreased myocardial reactive oxygen species (ROS) and prevented MHD. Critical cysteine thiolates, that can function as redox-switches, sense and respond to cellular redox changes. ROS-mediated signaling mechanisms play an important role in cardiac remodeling, hypertrophy, and heart failure. Identification and quantification of redox-sensitive cysteines is challenging because of their low abundance and structural complexity. Using proteomics combined with a thiol-reactive iodo-Tandem Mass Tag (iodoTMT) switch assay, we investigated global changes in reversible cysteine oxidation of the mouse cardiac proteome. Furthermore, we determined the effect of cardiac-catalase overexpression on cysteine oxidation induced by HFHS. This work aims to establish multiplex quantitation approaches for investigating the function of redox-sensitive cysteine thiols and their contribution to metabolic cardiovascular disease.
机译:饮食诱导的肥胖与代谢心脏病(MHD)有关。喂养高脂肪和高蔗糖(HFHS)饮食的小鼠发育了心肌肥大和舒张功能障碍。 MHD与心肌中的氧化应激增加相关,如亚硝素酸碱和羟基蛋白加合物所确定的。 Cariac特异性过表达过度表达(CattG),一种分解细胞内过氧化氢的酶,降低心肌反应性氧(ROS)并预防MHD。临界半胱氨酸硫醇酸盐,可以用作氧化还原切换,感觉和响应细胞氧化还原的变化。 ROS介导的信号传导机制在心脏重塑,肥大和心力衰竭中起重要作用。氧化还原敏感性半胱氨酸的鉴定和定量是挑战性,因为它们具有低丰度和结构性复杂性。使用蛋白质组学与硫醇反应性碘串肿瘤质量标签(Iodotmt)开关测定结合,我们研究了鼠标心脏蛋白质的可逆半胱氨酸氧化的全局变化。此外,我们确定了心脏过滤酶过表达对HFHS诱导的半胱氨酸氧化的影响。这项工作旨在建立用于研究氧化还原敏感半胱氨酸硫醇的功能的多重定量方法及其对代谢心血管疾病的贡献。

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