项目名称: HIV-1 Tat蛋白诱发心肌间质纤维化促致死性心律失常
项目编号: No.81202522
项目类型: 青年科学基金项目
立项/批准年度: 2013
项目学科: 药物学、药理学
项目作者: 白云龙
作者单位: 哈尔滨医科大学
项目金额: 23万元
中文摘要: HIV感染发病患者后期可出现严重的心血管并发症,极易造成患者心源性猝死,危害严重。以往研究认为抗HIV药物的应用很大程度上导致了其中致死性心律失常的发生,而对病毒来源致病原因认识甚少。本研究试图证明HIV心肌病及恶性心律失常发病过程中,HIV-1反式激活转录蛋白(Tat)可诱导心肌间质产生纤维化,并与细胞转化生长因子(TGF-β1)介导的Smads、Bax/Bcl-2等信号分子有关。尝试应用细胞共培养、膜片钳及分子生物学技术证明Tat蛋白通过促进成纤维细胞大量分泌TGF-β1,并旁分泌作用于心肌细胞HERG、Kir2.1、Cav1.2等通道产生异常调控,诱发心肌病并导致LQTs等恶性心律失常的发生。本课题的进行不但对HIV心肌病变的发病机制进行研究,完善对HIV-1 Tat蛋白功能的认识,同时将为临床抗HIV药物的应用提供指导依据。
中文关键词: 心律失常;成纤维细胞;心肌纤维化;lncRNA;
英文摘要: Most of HIV infected patients are suffering the cardiovascular complications which usually cause sudden cardiac death. Some studies consider that the application of anti-HIV chemicals, especially protease inhibitors, induces lethal arrhythmia, but less of studies deem that the viral factors result in lethal arrhythmia. This project try to proof that HIV-1 Tat protein causes matrix cells fibrosis, consequence increases expression of TGF-β1 in procedure of HIV induced cardiomyopathy and lethal arrhythmia. Cells co-culture, patch clamping and molecular biological technique should be used to test if HIV-1 Tat protein effect the expression of HERG, Kir2.1 and Cav1.2 by increase expression of TGF-β1 and relative downstream pathway. By studying the pathogenesis of HIV induced cardiomyopathy, we can perfect the cognition of the function of HIV-1 Tat protein and instruct the management of anti-HIV medicines.
英文关键词: Arrhytnmias;cardiac fibrlblasts;myocardial fibrosis;lncRNA;