中文摘要
临床证据提示,醛固酮(Aldosterone)是诱导难治性高血压(resistant hypertension)及其心肌等靶器官损伤(Target Organ Damage,TOD)的关键介导因子之一。醛固酮合成酶(aldosterone synthase,AS)是合成醛固酮的关键限速酶。我们课题组采用启动子CYP11B1 gene promoter,构建了含人类醛固酮合成酶基因(CYP11B2 gene)的载体(Vector),通过显微注射技术,目标是研制出人类AS基因高度表达的转基因小鼠模型。此模型在高盐饲喂的情况下,可诱导血压的升高、血浆醛固酮水平的增高。这项课题的研究将为高血压的发病机制,难治性高血压的控制以及高血压靶器官损伤的研究都提供了一个新的工具,不仅具有重要的学术价值,也具有良好的应用前景。笔者检索,国内外尚无这些研究的报道。
英文摘要
Clinical evidences indicate that aldosterone is the major mediator of resistant hypertension. Aldosterone synthase (AS) is the sole enzyme responsible for the production of aldosterone in humans. To determine the effects of increased production of human aldosterone on blood pressure (BP), we will construct the vector carrying human aldosterone synthase gene (cyp11B2) under the control of cyp11B1 promoter, and generating transgenic mice. Our target is to establish the mice model with phenotype of high serum aldosterone and high blood pressure induced by high salt diet. Our studies will provide promising and potential model which may applied in new drug discovery and mechanism studies related to control of hypertension and its target organ damages. No same studies has been searched out.
结题摘要
高血压是国际上发病率最高的疾患之一,也是其它致残致死性疾病的前期疾病。控制高血压病程的发展一直是国际上亟待研究的难题。醛固酮(Aldosterone)是诱导高血压及心肌损伤的关键介导因子之一。人类醛固酮合成酶(Aldosterone synthase, hAS, cytochrome P450 11B2, cyp11B2)是合成醛固酮的关键限速酶。本课题采用人类醛固酮合成酶CYP11B2 gene,研制出人类AS基因高度表达的转基因小鼠模型(hAS+/- mice)。此模型在高盐饲喂后,血压显著升高。与WT mice的血压相比,hAS+/- mice的血压显著升高 (hAS+/- mice: WT mice, 分别为Systolic BP: 135±14.1 mmHg versus 109±8.8 mmHg; Diastolic BP: 111±13.9 mmHg versus 87±8.0 mmHg, P<0.001)持续的醛固酮表达可诱导高血压心肌损伤(本部分内容需要继续研究)。这项课题的研究为高血压的发病机制,高血压的控制以及高血压靶器官损伤的研究都提供了一个新的工具。
