Novel role of the IGF-1 receptor in endothelial function and repair: studies in endothelium-targeted IGF-1 receptor transgenic mice.
Novel role of the IGF-1 receptor in endothelial function and repair: studies in endothelium-targeted IGF-1 receptor transgenic mice.
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DOI:
10.2337/db11-1494
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发表时间:
2012-09
期刊:
影响因子:
7.7
通讯作者:
Kearney MT
中科院分区:
文献类型:
--
作者:
Imrie H;Viswambharan H;Sukumar P;Abbas A;Cubbon RM;Yuldasheva N;Gage M;Smith J;Galloway S;Skromna A;Rashid ST;Futers TS;Xuan S;Gatenby VK;Grant PJ;Channon KM;Beech DJ;Wheatcroft SB;Kearney MT
We recently demonstrated that reducing IGF-1 receptor (IGF-1R) numbers in the endothelium enhances nitric oxide (NO) bioavailability and endothelial cell insulin sensitivity. In the present report, we aimed to examine the effect of increasing IGF-1R on endothelial cell function and repair. To examine the effect of increasing IGF-1R in the endothelium, we generated mice overexpressing human IGF-1R in the endothelium (human IGF-1R endothelium-overexpressing mice [hIGFREO]) under direction of the Tie2 promoter enhancer. hIGFREO aorta had reduced basal NO bioavailability (percent constriction to NG-monomethyl-l-arginine [mean (SEM) wild type 106% (30%); hIGFREO 48% (10%)]; P < 0.05). Endothelial cells from hIGFREO had reduced insulin-stimulated endothelial NO synthase activation (mean [SEM] wild type 170% [25%], hIGFREO 58% [3%]; P = 0.04) and insulin-stimulated NO release (mean [SEM] wild type 4,500 AU [1,000], hIGFREO 1,500 AU [700]; P < 0.05). hIGFREO mice had enhanced endothelium regeneration after denuding arterial injury (mean [SEM] percent recovered area, wild type 57% [2%], hIGFREO 47% [5%]; P < 0.05) and enhanced endothelial cell migration in vitro. The IGF-1R, although reducing NO bioavailability, enhances in situ endothelium regeneration. Manipulating IGF-1R in the endothelium may be a useful strategy to treat disorders of vascular growth and repair.
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影响因子:
7.3
作者:
Schleicher M;Yu J;Murata T;Derakhshan B;Atochin D;Qian L;Kashiwagi S;Di Lorenzo A;Harrison KD;Huang PL;Sessa WC
通讯作者:
Sessa WC
影响因子:
7.7
作者:
Nakagawa T;Kosugi T;Haneda M;Rivard CJ;Long DA
通讯作者:
Long DA
影响因子:
64.8
作者:
BREDT, DS;HWANG, PM;SNYDER, SH
通讯作者:
SNYDER, SH
影响因子:
64.8
作者:
Fulton, D;Gratton, JP;Sessa, WC
通讯作者:
Sessa, WC
影响因子:
37.8
作者:
Bugiardini, R;Manfrini, O;Morgagni, G
通讯作者:
Morgagni, G