摘要
目的:在大鼠肾系膜细胞及整体大鼠上观察卞达赖氨酸(bendazac lysine,BDL)对糖尿病肾病(di-abetic nephropathy,DN)的防治作用。方法:大鼠肾系膜细胞分别在3种浓度的BDL中培养36h后,流式细胞仪测定细胞S期百分率;RT-PCR法测定转化生长因子(transforming growth factorβ1,TGF-β1)mR-NA水平;放免法测定细胞内Ⅳ型胶原和层粘蛋白含量;糖尿病模型大鼠灌胃3种剂量的BDL8周后,亲和层析法测定大鼠血清糖化血红蛋白。结果:高糖和H2O2可使S期细胞百分数大幅度降低,TGF-β1 mRNA相对含量、Ⅳ型胶原和层粘蛋白含量明显升高。低中高3个浓度的BDL皆可使S期细胞比例分别有不同程度的升高;使TGF-β1 mRNA相对含量、Ⅳ型胶原和层粘蛋白含量显著降低。中高剂量的BDL可显著降低大鼠血清糖化血红蛋白,并明显改善其生理和精神状态。结论:BDL升高大鼠肾系膜细胞的S期百分数,降低TGF-β1 mRNA、Ⅳ型胶原和层粘蛋白水平的作用与DN密切相关,是潜在的DN防治药物。
AIM: To investigate the protective effects of bendazac lysine (BDL) on diabetic nephropathy (DN) in vitro and in vivo experiments. METHODS: After rat mesangial cells were cultured in 3 concentrations of BDL for 36 h, the percentages of S phase of cells were determined by flowcytometry; the transforming growth factor β1 (TGF-β1) mRNA level was assayed by reverse transcription PCR; and two main components of extracellular matrix (ECM), collagen Ⅳ and laminin, were determined by radioimmunoassay. Streptozotocin (STZ) induced diabetic rats were administered BDL at doses of 100, 200, 400 mg/kg for 8 weeks. The physical behavior and HbAlC levels of rats were observed. RESULTS: In the presence of high glucose and H2O2, the percentages of S phase of cells were lowered, and TGF-β1 mRNA level, collagen Ⅳ and laminin level were significantly increased. When compared with those in the high glucose group, the percentages of S phase of cells were signficantly raised, and the levels of TGF-β1 mRNA, collagen Ⅳ and laminin were statistically decreased. The physical behavior of high BDL treated rats restored to be vibrant, vigorous and weight gaining, and the HbAlC level was significantly reduced. CONCLUSION: BDL has the protective effects against damage caused by DN, and is a potential drug candidate worth further study in preventing and treating DN.
出处
《中国临床药理学与治疗学》
CAS
CSCD
2007年第5期552-557,共6页
Chinese Journal of Clinical Pharmacology and Therapeutics