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学科主题基础医学
Laminar shear stress up-regulates the expression of stearoyl-CoA desaturase-1 in vascular endothelial cells
Qin, Xiaomei; Tian, Jianwei; Zhang, Peng; Fan, Yanbo; Chen, Li; Guan, Youfei; Fu, Yi; Zhu, Yi; Chien, Shu; Wang, Nanping
关键词mechanotransduction hemodynamics endothelial functions gene expression lipid metabolism
刊名CARDIOVASCULAR RESEARCH
2007-06-01
DOI10.1016/j.cardiores.2007.02.014
74期:3页:506-514
收录类别SCI
文章类型Article
WOS标题词Science & Technology
类目[WOS]Cardiac & Cardiovascular Systems
研究领域[WOS]Cardiovascular System & Cardiology
关键词[WOS]ACTIVATED RECEPTOR-GAMMA ; ELEMENT-BINDING PROTEIN-1C ; HEPATIC INSULIN-RESISTANCE ; 1 GENE-EXPRESSION ; PPAR-GAMMA ; VELOCITY-MEASUREMENTS ; 3T3-L1 ADIPOCYTES ; MEMBRANE-FLUIDITY ; FATTY-ACIDS ; FLOW
英文摘要

Objective: Laminar shear stress plays critical roles in vascular homeostasis and exerts various metabolic effects on endothelial cells (ECs). Stearoyl-CoA desaturase-1 (SCD1), which catalyzes the biosynthesis of monounsaturated fatty acids, affects the lipid composition and fluidity of the cell membrane. Thus, we examined the effect of laminar flow on SCD1 expression in ECs.

Methods: A flow chamber was used to impose a laminar shear stress on a confluent monolayer of human vascular ECs. The expression of SCD1 was examined using real-time RT-PCR and Northern and Western blotting. Immunohistochemical staining was used to assess the expression of SCD1 in Sprague-Dawley rat arteries, including the sites of arterial bifurcation.

Results: Laminar shear stress (12 dyn/cm(2), 12 h) markedly increased the gene expression of SCD1 in ECs. The flow-induced SCD1 expression was attenuated by peroxisome proliferator-activated receptor (PPAR)-gamma antagonists both in vitro and in vivo. Troglitazone and rosiglitazone significantly increased the gene expression of SCD1. Furthermore, overexpression of a constitutively active PPAR gamma induced the expression of SCD1 in ECs. Immumohistochemical study of cross-sections from rat celiac arteries revealed that endothelial expression of SCD I was substantially higher on the medial division apex, where the shear stress is high and more laminar, than the lateral aspect, where the shear stress is low and unsteady.

Conclusion: These in vitro and in vivo results demonstrate that laminar flow increased the expression of SCD1 in endothelium through a PPAR gamma-specific mechanism, which may contribute to the shear stress-mediated protective roles in ECs. (C) 2007 European Society of Cardiology. Published by Elsevier B.V. All rights reserved.

语种英语
WOS记录号WOS:000247160200022
引用统计
被引频次:29[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.bjmu.edu.cn/handle/400002259/61516
专题北京大学基础医学院_心血管所
作者单位1.Peking Univ, Minist Educ Res, Inst Cardiovasch Sci, Key Lab Mol Cardiovasc Sci, Beijing 100083, Peoples R China
2.Univ Calif San Diego, Dept Bioengn & Med, La Jolla, CA 92093 USA
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GB/T 7714
Qin, Xiaomei,Tian, Jianwei,Zhang, Peng,et al. Laminar shear stress up-regulates the expression of stearoyl-CoA desaturase-1 in vascular endothelial cells[J]. CARDIOVASCULAR RESEARCH,2007,74(3):506-514.
APA Qin, Xiaomei.,Tian, Jianwei.,Zhang, Peng.,Fan, Yanbo.,Chen, Li.,...&Wang, Nanping.(2007).Laminar shear stress up-regulates the expression of stearoyl-CoA desaturase-1 in vascular endothelial cells.CARDIOVASCULAR RESEARCH,74(3),506-514.
MLA Qin, Xiaomei,et al."Laminar shear stress up-regulates the expression of stearoyl-CoA desaturase-1 in vascular endothelial cells".CARDIOVASCULAR RESEARCH 74.3(2007):506-514.
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