氨基胍和维生素C对糖尿病肾病模型大鼠血清层粘连蛋白的影响

目的:研究氨基胍、维生素C对糖尿病肾病模型大鼠血清层粘连蛋白的影响。方法:将大鼠随机分为正常对照组、糖尿病组和维生素C、氨基胍、维生素C+氨基胍治疗组;除正常对照组外,其余4组经腹腔注射链脲佐菌素建立1型糖尿病模型,造模成功后各组给予相应药物治疗16wk,观察并测定治疗期间及治疗后大鼠的一般状况、血糖、糖化血红蛋白、层粘连蛋白、尿素氮、血肌酐变化及24h尿蛋白排泄率。结果:造模后4组大鼠均出现血清层粘连蛋白升高和糖尿病性肾病;氨基胍、维生素C对血糖无影响,但能改善基本状况,二者合用比单用能显著降低糖尿病大鼠的血清层粘连蛋白含量、尿素氮、血肌酐及24h尿蛋白排泄率。结论:氨基胍、维生素C无降糖作用,但合用后可降低血清层粘连蛋白含量,保护肾功能,具有协同作用。

Effects of Aminoguanidine and Vitamin C on Serum Laminin of Rats with Diabetic Nephropathy Model

OBJECTIVE: To observe the effects of aminoguanidine and vitamin C on serum laminin of rats with diabetic nephropathy model. METHODS: The rats were randomly divided into normal control group, diabetes model group, vitamin C group,aminoguanidine group,vitamin C plus aminogucinidine group. The diabetes model(Type 1) was established in all groups except the normal control group by injecting them intraperitoneally with streptozotocin, after which, they were treated with the corresponding drugs for 16 weeks. During and after the treatment, the general state, blood gloucose levels, glycosylated hemoglobin, serum laminin, urea nitrogen, serum creatinine, and the 24-hours urinary albumin excretion rate of each group were observed and determined. RESULTS: The serum laminin levels increased and diabetic nephropathy occurred in all the 4 groups after being modelled. Aminoguanidine group, vitamin C had no effect on blood glucose level, while they could improve the basic condition and the combination of the two could significantly decrease serum levels of laminin, urea nitrogen, creatinine and the 24-hours urinary albumin excretion rate. CONCLUSION: Aminogucinidine and vitamin C couldn't decrease the blood sugar level but the combination of which has a synergistic action to decrease serum laminin level while preventing renal function.