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• W1976987003 abstract "Bone marrow (BM) progenitors participate in new vessel formation and endothelial repair. The leptin receptor (ObR) is expressed on hematopoietic cells; however, the effects of leptin on BM progenitor cells and their angiogenic potential are unknown.In the present study, we show that the short-term administration of leptin (over five consecutive days) into wild-type mice increased the number of circulating, BM-derived sca-1(+), flk-1(+) vascular progenitors, 95 ± 1.7% of which also expressed ObR. Ex vivo stimulation of BM cells with leptin enhanced the expression of NADPH oxidase isoform 2 (NOX2), and the leptin-induced increase in reactive oxygen species production, matrix metalloproteinase-9 (MMP9) expression and circulating soluble KitL levels was absent in mice lacking NOX2. Furthermore, intraperitoneal injections of leptin improved perfusion and increased the number of BM-derived, CD31-positive endothelial cells in ischaemic hindlimbs after femoral artery ligation. The effects of leptin on the mobilization of sca-1(+), flk-1(+) cells and neovascularization were abolished in mice transplanted with BM from ObR-deficient and in NOX2(-/-) mice.Our findings suggest that the angiogenic effects of leptin involve sca-1(+), flk-1(+) vascular progenitor cells mobilized from the BM in response to ObR-mediated activation of NOX2, increased MMP9 expression, and sKitL release." @default.
• W1976987003 created "2016-06-24" @default.
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• W1976987003 date "2011-11-06" @default.
• W1976987003 modified "2023-10-03" @default.
• W1976987003 title "Leptin promotes the mobilization of vascular progenitor cells and neovascularization by NOX2-mediated activation of MMP9" @default.
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• W1976987003 doi "https://doi.org/10.1093/cvr/cvr275" @default.
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