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ENGLISH ABSTRACT
JOURNAL ARTICLE
[Effect of Alloxan-induced diabetes mellitus on the functions of bone marrow-derived and circulating endothelial progenitor cells].
Zhonghua Yi Xue za Zhi [Chinese medical journal] 2017 July 26
Objective: To explore whether diabetes mellitus (DM) impairs functions of bone marrow-derived endothelial progenitor cells (BM-EPC) and circulating EPC. Methods: Diabetic model of rabbit was induced by Alloxan injection and the rabbits were then randomly divided into three groups: BM-EPC group, circulating EPC group, and DM group, with six rabbits in each group. Another 6 normal rabbits were enrolled as normal control group as well. 8 weeks later, BM-EPC and circulating EPC from diabetic and healthy rabbits were isolated and cultured. Colony number, proliferation, adhesion and tube formation function were detected. Exogenous diabetic BM-EPC and circulating EPC were analyzed for therapeutic efficacy in acute ischemia model of diabetic rabbits. Left ventricular (LV) function was assessed using Echocardiography. Capillary density and fibrosis area were evaluated by confocal laser scanning microscope (CLSM) and Masson-trichrome staining. The mRNA expression of vascular endothelial growth factor (VEGF) and basic fibroblast growth factor (bFGF) was analyzed using real-time quantitive PCR. Results: Colony number, proliferation, adhesion and tube formation function of diabetic circulating EPC were significantly reduced compared with healthy rabbits. DM impaired tube-forming ability of BM-EPC, but did not influence colony number, proliferation and adhesion function. Compared with circulating EPC and control group, BM-EPC group had fewer fibrosis area (6.98%±0.94% vs 13.03%±2.97% and 15.84%±4.74%, both P=0.001), higher capillary density [(792±87) vs (528±71) and (372±77) vessels/mm(2,) both P<0.001], higher mRNA expression of VEGF (6.25±2.33 vs 2.19±1.01 and 1.55±0.52, both P<0.001) and bFGF (6.38±2.65 vs 1.24±0.76 and 1.18±0.82, both P<0.001), higher left ventricular ejection fraction (LVEF) (61%±4% vs 47%±5% and 50%±10%, both P<0.05). Conclusions: DM not only impaired functions of circulating EPC, but also influenced tube formation function of BM-EPC. Auto transplantation of BM-EPC may rescue the ischemic myocardium by neovascularization and paracrine effect in diabetic rabbits.
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