Endothelial PGC-1α mediates vascular dysfunction in diabetes.
Endothelial PGC-1α mediates vascular dysfunction in diabetes.
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DOI:
10.1016/j.cmet.2013.12.014
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发表时间:
2014-02-04
期刊:
影响因子:
29
通讯作者:
Arany Z
中科院分区:
文献类型:
--
作者:
Sawada N;Jiang A;Takizawa F;Safdar A;Manika A;Tesmenitsky Y;Kang KT;Bischoff J;Kalwa H;Sartoretto JL;Kamei Y;Benjamin LE;Watada H;Ogawa Y;Higashikuni Y;Kessinger CW;Jaffer FA;Michel T;Sata M;Croce K;Tanaka R;Arany Z
Endothelial dysfunction is a central hallmark of diabetes. The transcriptional coactivator PGC-1α is a powerful regulator of metabolism, but its role in endothelial cells remains poorly understood. We show here that endothelial PGC-1α expression is high in diabetic rodents and humans and that PGC-1α powerfully blocks endothelial migration in cell culture and vasculogenesis in vivo. Mechanistically, PGC-1α induces Notch signaling, blunts activation of Rac/Akt/eNOS signaling, and renders endothelial cells unresponsive to established angiogenic factors. Transgenic overexpression of PGC-1α in the endothelium mimics multiple diabetic phenotypes, including aberrant re-endothelialization after carotid injury, blunted wound healing, and reduced blood flow recovery after hindlimb ischemia. Conversely, deletion of endothelial PGC-1α rescues the blunted wound healing and recovery from hindlimb ischemia seen in type 1 and type 2 diabetes. Endothelial PGC-1α thus potently inhibits endothelial function and angiogenesis, and induction of endothelial PGC-1α contributes to multiple aspects of vascular dysfunction in diabetes.
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发表时间:
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影响因子:
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