内皮细胞特异性肝激酶B1的缺失在体内小鼠中引起内皮功能障碍和高血压
Wencheng Zhang1, Qilong Wang, Yue Wu
1Section of Molecular Medicine, Department of Medicine (W.Z., Q.W., Y.W., C.M., Z.L., X.D., Q.W., M.-H.Z.) and Department of Biochemistry and Molecular Biology (Z.L., M.-H.Z.), University of Oklahoma Health Sciences Center, Oklahoma City; Department of Cardiology, First Affiliated Hospital of Xi'an Jiaotong University Health Science Center, Xi'an, China (Y.W., W.L., Z.-Y.Y., M.-H.Z.); and Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Public Health, Qilu Hospital of Shandong University, Jinan, Shandong, China (M.-H.Z.).
内皮肝肝激酶B1 (LKB1) 损失导致高血压和受损的血管功能通过增加caveolin-1. 恢复AMP激酶活性使这些效应正常化.
科学领域:
- 心血管生物学 心血管生物学
- 内皮细胞生物学 内皮细胞生物学
- 代谢调节 代谢调节 代谢调节 代谢调节
背景情况:
- 肝激酶B1 (LKB1) 是一个关键的瘤抑制剂,调节细胞极性和能量.
- 它在体内内皮质功能中的作用仍然未被探索.
研究的目的:
- 研究内皮细胞LKB1在调节血压和内皮功能中的功能.
- 阐明LKB1对内皮的影响背后的分子机制.
主要方法:
- 生成内皮特异性的LKB1淘汰赛小鼠 (LKB1(endo-/-)).
- 评估生理参数 (血压,心脏功能) 和内皮功能.
- 分析了内皮氧化合成酶 (eNOS) 活性,AMP激酶 (AMPK) 酸化和卡韦林-1水平.
- 使用siRNA进行caveolin-1敲击和人类抗原R (HNR) 敲击.
- 采用了构成性活性AMP激酶的腺病毒输送.
主要成果:
- LKB1的endo-/-) 小鼠患有高血压,心脏缩和受损的内皮依赖放松.
- 来自LKB1(endo-/-) 小鼠的内皮细胞显示了减少的eNOS活性和AMPK酸化.
- 在LKB1 ((endo-/-) 内皮细胞中增加的卡韦林-1水平被卡韦林-1 knockdown 正常化.
- 人类抗原R稳定了caveolin-1mRNA;HNR敲击减少了caveolin-1的表达.
- 在LKB1中的AMPK激活降低了血压和改善了内皮功能.
结论:
- 内皮细胞LKB1对于维持正常血压和内皮细胞功能至关重要.
- LKB1通过AMPK介导的卡韦林-1表达的控制来调节eNOS活动和内皮功能.
- 准LKB1-AMPK-caveolin-1通路可能为高血压和内皮功能障碍提供治疗策略.
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