Vitamin D (1,25-(OH)D) Improves Endothelial Progenitor Cells Function Via Enhanced NO Secretion in Systemic Lupus Erythematosus
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It has been proven that vitamin D was decreased and function of circulating endothelial progenitor cells (EPCs) was injured in systemic lupus erythematosus (SLE) patients. However, the effect of vitamin D on the function of EPCs and its mechanism need further study. Therefore, we investigated whether vitamin D improved the function of EPCs . The peripheral blood mononuclear cells of the participants were isolated from SLE patients and control subjects and cultured to EPCs. After the EPCs were treated with vitamin D (1,25-(OH)D), we evaluated the number, migratory and proliferative activities, and nitric oxide (NO) production of EPCs and detected vascular endothelial function by flow-mediated dilatation (FMD). We found that vitamin D in a dose-dependent manner improved number and migratory and proliferative activities of EPCs from SLE patients. Additionally, vitamin D upregulated NO production from EPCs . A significant correlation between the FMD and plasma NO level was found. There was also a correlation between number, migration, and proliferation of EPCs and NO production. Thus, the present findings indicated that vitamin D improved the function of EPCs from SLE patients via NO secretion.
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