糖尿病大鼠肾组织中糖基化终产物受体基因表达的研究

Gene expression of receptor for advanced glycosylation end products in diabetic rat kidney tissue

目的 观察不同病程的糖尿病大鼠肾组织内糖基化终产物受体(RAG)mRNA的表达水平的改变。方法 采用逆转录聚合酶链式反应(RT-PCR)检测病程12周内RAGEmRNA水平。结果 诱发糖尿病大鼠2周时肾脏皮、髓质内RAGEmRNA表达无明显变化,4周后其表达不断地显著增加(P<0.05)。诱发8周、12周的糖尿病大鼠,其糖化血红蛋白(GHb)水平明显升高(P<0.001)。结论 糖尿病状态下,肾组织内RAGE的高表达可能与糖尿病肾病的发病有关,且可能是高血糖诱发AGEs形成的结果。

Objective To probe the changes of RAGEmRNA expression in renal tissue of.streptozotocin (STZ)-induced diabetic rats. Methods Quantitative reverse transcription polymerase chain reaction (RT-PCR) was used in control rats and diabetic rats for 12 weeks. Results After 4 weeks of diabetes inducement, RACEmRNA level showed a continuous increase both in diabetic renal cortex and medulla. However, this enhancement could not be observed in 2 weeks of diabetes. In addition, after 8 weeks diabetic rats had significantly higher glycated Hb(GHb). Conclusion Gene expression of RAGE in renal tissue of diabetic rats is altered and the excessive gene expression of RAGE may enhance the AGEs-RAGE interactions which would contribute to the development of diabetic nephropathy. Furthermore, this change occurs as a result of hyperglycemia-induced AGEs formation.