碱性成纤维细胞生长因子基因真核表达载体转染骨髓间充质干细胞移植治疗糖尿病

BACKGROUND:Existing studies have shown that bone marrow mesenchymal stem cells can significantly improve islet function in diabetic rats to decrease excessively high blood glucose level, which may be related to the enhancement of differentiation ability of autologou pancreatic stem cells. OBJECTIVE:To observe the therapeutic efficacy of basic fibroblast growth factor gene eukaryotic expression vector (PEGFP-C3-BFGF) transfection of bone marrow mesenchymal stem cells in diabetic rats. METHODS:Recombinant adenovirus (Ad.aFGF) mediated PEGFP-C3-BFGF was transfected into bone marrow mesenchymal stem cells, and PEGFP-C3-BFGF expression was observed using fluorescence microscopy. Eighty Sprague-Dawley rats were randomly divided into normal control group, diabetes group, transplantation group, gene transfection group, with 20 rats in each group. After modeling, rats in different groups were given portal vein injection of normal saline, PBS, 1 mL of bone marrow mesenchymal stem cell suspension, and 1 mL of PEGFP-C3-BFGF-transfected bone marrow mesenchymal stem cell suspension. RT-PCR method was used to detect mRNA expression of matrix metalloproteinases in pancreatic tissue of rats in each group. Blood glucose levels of rats were detected at 24 hours, 3, 7, 14, 21 days after transplantation. ELISA method was used to detect plasma insulin levels in rats. Pathological changes of the pancreas were observed using hematoxylin-eosin staining. RESULTS AND CONCLUSION:Under the fluorescence microscope, PEGFP-C3-BFGF transfected into cells after 48 hours showed significant specific red fluorescence. Two weeks after transplantation, matrix metalloproteinases mRNA expression was significantly increased in the diabetes group compared with the control group (P < 0.05), while it was decreased in the transplantation and gene transfection groups compared with the diabetes group (P < 0.05). After transplantation, the blood glucose levels in rats were ranked as follows: control group < gene transfection group < transplantation group < diabetes group (P < 0.05), and the plasma insulin levels in rats ranked as follows: control group > gene transfection group > transplantation group > diabetes group (P < 0.05). Pathological findings of the pancreas showed that the transplantation group was superior to the diabetes group, but inferior to the gene transfection group that was similar to the control group. All these findings indicate that PEGFP-C3-BFGF-transfected bone marrow mesenchymal stem cell transplantation can improve blood glucose levels and stimulate insulin secretion in diabetic rats, which may improve the severity of diabetes mellitus by decreasing the mRNA expression of matrix metalloproteinases.     

2型糖尿病糖化血红蛋白与血脂水平的相关性分析

目的 探讨2型糖尿病糖化血红蛋白与血脂水平的相关性.方法 将579例2型糖尿病患者依据HbA1c分组,分析HbA1c对血脂的影响,并进一步对血脂异常组做Logistic回归多因素分析.结果 血糖控制差组的总胆固醇(TC)、甘油三酯(TG)、低密度脂蛋白(LDL)和极低密度脂蛋白(VLDL)显著高于血糖控制良好组(P<0.05),血糖控制良好组的高密度脂蛋白(HDL)显著高于血糖控制较差组(P<0.05),高TC组、高LDL组和低HDL组的糖化血红蛋白显著高于正常对照组(P<0.05).结论 2型糖尿病患者的糖化血红蛋白与血脂存在明显的相关性.     

T2DM患者首次短期胰岛素强化治疗对铁代谢指标的影响

目的初步探讨T2DM患者首次应用胰岛素并进行强化治疗前后铁代谢相关指标的变化,及临床指标与血清铁(SI)、血清铁蛋白(SF)的相关性研究。方法收集120例既往未曾应用胰岛素治疗,且FBG≥11.1mmol/l或HbA1c≥9.0%的2型糖尿病患者,应用胰岛素泵进行强化治疗,观察高血糖状态纠正前后SF、SI、空腹血糖(FBG)、胰岛β细胞功能多项临床资料的相关性变化。进一步分析SF、SI与一般信息、血糖、血脂、HOMA2-β、HOMA2-IR指数的相关性。结果 FBG、HOMA2-IR较前下降,HOMA2-β较前改善,SF、SI较治疗前下降,进一步相关性分析示治疗前SF与HOMA2-IR、糖化血红蛋白(HbA1c)、甘油三酯(TG)呈正相关。SF差值与病程呈负相关,与FBG差值、HOMA2-IR差值呈正相关。结论首次短期胰岛素强化治疗可纠正高血糖状态,改善胰岛素抵抗,SF、SI水平下降。