大脑中hsd11b2的条件删除会导致盐食欲和高血压
Louise C Evans1, Jessica R Ivy1, Caitlin Wyrwoll1
1From British Heart Foundation Centre for Cardiovascular Science, The University of Edinburgh, United Kingdom (L.C.E., J.R.I., C.W., J.A.M., R.I.M., T.H.C., C.J.K., J.J.M., J.R.S., M.C.H., M.A.B.); and Dietetics, Nutrition and Biological Sciences Department, Queen Margaret University, Edinburgh, United Kingdom (E.A.S.Al-D.). The current address for Dr Evans is Department of Physiology, Cardiovascular Center, Medical College of Wisconsin, Milwaukee; the current address for Dr Wyrwoll is School of Anatomy, Physiology & Human Biology, The University of Western Australia, Crawley, Australia; and the current address for Dr Christensen is Department of Cardiovascular and Renal Research, University of Southern Denmark, Odense.
大脑11β-基固醇脱酶2型 (11βHSD2) 缺陷不会直接导致高血压,但会增加盐食欲和盐敏感性. 这表明中央矿物质皮质体受体通路是血压调节的关键.
科学领域:
- 神经内分泌学神经内分泌学
- 心血管生理学心血管生理学
- 遗传学 遗传学 是一个
背景情况:
- 显而易见的Mineralocorticoid过量涉及11β-hydroxysteroid脱酶2型 (11βHSD2) 突变,通过矿物质皮质醇受体激活导致高血压.
- 虽然11βHSD2存在于大脑中,但其在高血压中的作用尚不清楚.
研究的目的:
- 调查11βHSD2在高血压和盐食欲中的核心作用.
- 为了生成和分析11βHSD2脑特异性淘汰 (Hsd11b2.BKO) 小鼠.
主要方法:
- 使用Cre-Lox策略生成了HSD11b2.BKO小鼠.
- 在成年小鼠中测量血压和盐食欲.
- 用于药理干预的螺旋和甲.
主要成果:
- Hsd11b2.BKO小鼠表现出正常的基本血压,但在提供盐水时,盐食欲和高血压显著增加.
- 盐诱导的高血压是可逆的,使用螺旋和掩盖德甲.
- 高血压并不是由于功能障碍,而是增强了压力反应和阻力反应.
结论:
- 大脑11βHSD2缺乏促进了盐的饥饿和盐的敏感性,而不是内在的高血压.
- 11βHSD2表达神经元通过矿物质皮质体受体将盐食欲和血压联系起来.
- 中央矿物质皮质类受体对抗作用可以通过改善对低饮食的坚持来帮助高血压的管理.
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