异常的化物细胞内通道4表达有助于肺动脉高血压中的内皮功能障碍
Beata Wojciak-Stothard1, Vahitha B Abdul-Salam, Ka Hou Lao
1Centre for Pharmacology and Therapeutics, Department of Medicine, Imperial College London, London, UK (B.W.-S., V.B.A.-S., K.H.L., H.T., R.J.E., C.J.R., J.W., L.Z., M.R.W.); Cardiovascular Pulmonary Research Group, University of Colorado Denver Health Sciences Center, Aurora (D.C.I., C.L., Z.L., K.R.S.); Division of Nephrology, Department of Internal Medicine, St. Louis University, St. Louis MO (J.C.E.); Laboratory of Cancer Biology & Genetics, Centre for Cancer Research, Bethesda, MD (S.H.Y.); and National Pulmonary Hypertension Service and National Heart & Lung Institute, Imperial College Healthcare NHS Trust, London, UK (L.S.H., J.S.R.G.).
化物细胞内通道4 (CLIC4) 在肺高血压中升高,导致内皮功能障碍. 在肺动脉内皮细胞中抑制CLIC4改善了屏障功能并减少了异常细胞生长.
科学领域:
- 心血管生物学 心血管生物学
- 肺高血压的病理生理学
- 内皮细胞生物学 内皮细胞生物学
背景情况:
- 化物细胞内通道4 (CLIC4) 在肺血管和肺动脉高血压 (PAH) 患者的病变中高度表达.
- CLIC4在调节血管生成和内皮管形成方面发挥作用.
- 异常的CLIC4表达与PAH的血管病理有关.
研究的目的:
- 研究化物细胞内通道4 (CLIC4) 在肺高血压的发展和进展中的作用.
- 阐明CLIC4在肺高血压中影响内皮细胞功能的机制.
主要方法:
- 评估了PAH患者和动物模型的血和内皮细胞中的CLIC4蛋白表达.
- 利用CLIC4基因删除和shRNA在小鼠模型和细胞培养中抑制CLIC4表达.
- 研究了CLIC4操纵对内皮屏障功能,细胞存活率和血管生成的影响.
- 研究了涉及NF-κB,HIF-1α,VEGF和内甲蛋白-1的分子通路.
主要成果:
- 在PAH患者和肺高血压模型中,CLIC4蛋白水平升高.
- 在小鼠中,CLIC4基因缺失减弱了缺氧诱导的肺高血压.
- 过度表达CLIC4损害了内皮屏障功能并增强了血管生成,而抑制则产生了相反的效果.
- 通过p65-NF-κB,HIF-1α稳定和下游生长因子生产,CLIC4影响内皮功能.
结论:
- 升高的CLIC4表达是肺高血压的早期指标.
- 在肺高血压的进展中,CLIC4充当了内皮功能障碍的关键调解者.
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