海拔對2型糖尿病患者外周血內(nèi)皮祖細胞數(shù)量及單核細胞功能的影響
[Abstract]:Objective: with the development of China's economy, the dietary pattern of the population is transformed from a plant based diet to a high proportion of animal food. In recent years, the incidence of diabetes has increased year by year, and the vascular disease caused by diabetes has become the main cause of death and disability in diabetic patients. Progenitor cells refer to the mobilization of the bone marrow, which can be recruited to the injured part, proliferate and differentiate into mature endothelial cells, and integrate into the endothelial cell layer, and promote vascular generation by secreting a variety of vascular endothelial growth factors by paracrine, which is essential to promote vascular repair under physiological conditions and to promote vascular repair under pathological conditions. Ficoll density gradient centrifugation obtains mononuclear cells from peripheral blood, then through vascular endothelial growth factor (VEGF), basic fibroblast growth factor (bFGF) inducing and precoating fibronectin to induce cell adhesion and differentiation to endothelial progenitor cells. Endothelial progenitor cells can be obtained through adherence screening. Endothelial progenitor cells and monocyte transplantation and activation are effective methods for the treatment of diabetic vascular complications. Endothelial progenitor cells play a role in repairing damaged blood vessels and promoting new vascular functions, mediated by multiple factors, and injury department. Ischemic anoxia stimulates the expression of hypoxia inducible factor 1 alpha (HIF-1 a), which activates the expression of its downstream genes, such as stromal cell derived factor 1 (SDF-1), VEGF and so on, prompting EPCs mobilization, migrating to the injured site to repair damaged vascular endothelium and promoting vascular rebirth. What is the change in the number of peripheral blood mononuclear cells and endothelial progenitor cells in the peripheral blood mononuclear cells in low altitude areas? Therefore, the aim of this paper is to analyze the effect of altitude on the number of endothelial progenitor cells and the function of monocyte in type 2 diabetic patients, so as to provide the basis for the treatment of vascular complications of patients with type 2 glycan disease at high altitude. Method: the effect of 1. altitude on peripheral blood endothelial progenitor cells in type 2 diabetic patients. The samples were from Xianyang city of 386 meters above sea level and Lanzhou city of 1520 meters above sea level. Half and half of men and women were resident Han residents over 40 years old, respectively, low altitudes and high altitude groups, 25 cases of type 2 diabetes mellitus, 20 cases of healthy people, high altitudes in low altitude group. The group included 29 patients with type 2 diabetes and 20 healthy persons. The peripheral blood 8m1 was collected to detect the blood lipid, blood sugar, glycated hemoglobin concentration. Flow cytometry was used to detect the peripheral blood EPCs and the effect of.2. elevation on the function of peripheral blood mononuclear cells in type 2 diabetic patients. The enzyme linked immunosorbent assay (ELISA) was used to detect HIF-1 alpha, SDF-1, IL-8 in serum. The concentration of VEGF, HCY. Density gradient centrifugation was used to obtain peripheral blood mononuclear cells, and fluorescence quantitative PCR was used to detect the gene expression of LFA-1, CXCR2, CXCR4, CXCR7. Protein immunoblotting (WesternBlot) was used to detect HIF-1 alpha CXCR2. CXCR4, CXCR7 protein expression. Fruit: 1. altitude on peripheral blood endothelial progenitor cells of type 2 diabetic patients Compared with healthy people, the body mass index (BMI), waist to hip ratio (WHR), triglyceride, glycemic and glycated hemoglobin were higher than those in the healthy group, and the peripheral blood EPCs of the patients with type 2 diabetes in the low altitude group was lower than that of the healthy ones. Compared with the low altitude group, the EPCs of the diabetic group and the healthy group were lower than the low altitude. Diabetes group and health group were divided into diabetes group with microvascular complication group, diabetes with large blood vessel complication group and diabetic non vascular complication group. Compared with health group, the number of peripheral blood EPCs in peripheral blood was the =2 type sugar of type 2 diabetic patients with type 2 diabetes with microvascular complications. The effect of.2. elevation on peripheral blood mononuclear cell function in type 2 diabetic patients with urinary disease and great vascular complication. (1) the concentration of HIF-1 a, SDF-1, VEGF in the monocytes of T2DM patients in high altitude group were lower than those in the healthy group, and the concentration of P0.05, IL-8 was not different, and the concentration of HIF-1 alpha, SDF-1, VEGF, IL-8, between the low altitude health group and the T2DM group. Compared with the low altitude group, the serum concentration of HIF-1a and SDF-1 in the high altitude health group and the diabetic group increased significantly, while the serum concentration of VEGF and IL-8 decreased significantly. The expression of VEGF and IL-8 was significantly lower in the T2DM group at low altitude than in the healthy persons. The expression of CXCR2 in the low altitude T2DM group was significantly lower than that of P0.001, LFA-1, CXCR4 and CXCR7, while the high altitude T2DM was not different. The CXCR2 and CXCR4 of the group were significantly lower than those in the healthy group, P0.001. Compared with the low altitude group, the CXCR2, CXCR4 and CXCR7 expressions in the high altitude health group and the T2DM group were all downregulated, P0.05, and the CXCR2, CXCR4, CXCR7 and LFA-1 in the high altitude Health Group were 1.5 times as high as those in the low altitude group. The expression of XCR7 and LFA-1 were 0.54,0.26,0.53 and 1.4 times of the low altitude group, the expression of LFA-1 was up and P0.05. protein expression level. Compared with healthy people, the expression of HIF-1 alpha CXCR2, CXCR4 and CXCR7 in the T2DM group decreased. The expression of XCR7 was significantly reduced. Conclusion: in the area below 1500 m, the number of EPCs in peripheral blood of patients with type 2 diabetes decreased, and the adhesion of peripheral blood mononuclear cells increased, and the ability to migrate and promote angiogenesis was weakened.
【學位授予單位】:蘭州大學
【學位級別】:碩士
【學位授予年份】:2015
【分類號】:R587.2
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