牛初乳短链胰岛素样生长因子-1对糖尿病大鼠肾脏的保护作用及其机制研究  

The protective effects of bovine colostrum truncated IGF-1 on kidney of diabetic rats and the study of mechanism

作　　者：游利[1] 俞茂华[1] 叶红英[1] 杨秀芳[1] 颜贻谦[2] 钟慈声[3] 郑颂国 朱禧星[1] 

机构地区：[1]上海医科大学附属华山医院内分泌科,200040 [2]中国科学院上海生理所 [3]上海医科大学电镜室 [4]上海肿瘤医院分子生物实验室

出　　处：《中华肾脏病杂志》2000年第4期251-255,共5页Chinese Journal of Nephrology

摘　　要：目的　观察牛初乳短链胰岛素样生长因子－１（ＢＣｔＩＧＦ－１）对糖尿病肾病的保护作用及探讨其可能的作用机制。方法采用生化法、放射免疫法、荧光分析法及逆转录．聚合酶链式反应（ＲＴ－ＰＣＲ）技术等进行研究。结果（１）糖尿病治疗组的空腹血糖、甘油三酯、果糖胺明显低于糖尿病对照组；（２）糖尿病治疗组２４ｈ尿白蛋白排泄率、２４ｈ尿量、２４ｈ内生肌酐清除率低于糖尿病对照组；（３）电镜观察大鼠肾脏病理切片发现ＢＣｔＩＧＦ－１对糖尿病大鼠肾脏损害有改善作用；（４）糖尿病对照组肾组织ＩＧＦ－１ｍＲＮＡ表达明显低于正常对照组，糖尿病对照组与糖尿病治疗组无明显异常；（５）糖尿病治疗组肾组织胶原含量及糖基化终末产物（ＡＧＥｓ）、尿血栓素Ｂ２／６－酮－前列环素１α（ＴＸＢ２／６－ｋｅｔｏ－ＰＧＦ１α）低于糖尿病对照组。结论（１）ＢＣｔＩＧＦ－１可以明显降低ＳＴＺ糖尿病大鼠的血糖、血脂；（２） ＢＣｔＩＧＦ－１不会引起肾皮质 ＩＧＦ－１ｍＲＮＡ表达的增加；（３） ＢＣｔＩＧＦ－１对 ＳＴＺ糖尿病大鼠肾脏有保护作用，其保护机制是由于ＢＣｔＩＧＦ－１对血糖、血脂的改善；此外，可能与其减少紧组织胶原及ＡＧＥｓ含量，改善前列腺素－血栓素合成的不平衡?Objective To observe the effect of BCtIGF-1 on diabetic nephropathy and explore its mechanism. Methods Techniques including biochemistry, radioimmunoassay, fluoroassays, molecular biology(HT-PCR) were used in this study. Results (1) Serum FBG, TG and FMN concentrations in BCtIGF-1 groups were significantly lower than those of diabetic control group; (2) 24h UAER, 24h urinary volume in BCtIGF-1 groups were significantly lower than those of diabetic control group; (3) BCtIGF-1 had protective effect on diabetic nephropathy by observing the kidney tissues with electron microscope; (4) Kidney IGF-1mRNA in diabetic control group was significantly lower than that of normal control group, no differences were found between diabetic control group and BCtIGF-1 groups; (5) Collagen and AGEs of kidney tissue, urinary TXB2/6-keto-PGF1a in BCtIGF-1 groups were significantly lower than those of diabetic control group; Conclusions (1) BCtIGF-1 has hypoglybemic and hypolipidic effects; (2) BCtIGF-1 does not increase the level of IGF-1mRNA in kidney tissue; (3) BCtIGF-1 might have protective effect on diabetic nephropathy. The protective mechanism may be associated with its hypoglycemic and hypolipidic effects; in addition, it might relate to the improvement of PGI2-TXA2 synthetic imbalance and the reduction of the collagen and AGEs levels in kidney tissue.

关 键 词：糖尿病肾病 胰岛素样生长因子1 肾脏 保护作用 

分 类 号：R587.2[医药卫生—内分泌]