内皮素转换酶-内皮素系统与2型糖尿病大血管病变关系的研究

目的　探讨内皮素转换酶 (ECE)、内皮功能改变与 2型糖尿病大血管病变的关系。方法　应用RT PCR技术对 2型糖尿病患者 40例、2型糖尿病并大血管病变患者 6 0例及正常对照组6 0例进行了ECEmRNA水平、ECE活性测定 ,内皮功能检测。结果　ECEmRNA水平、ECE活性在2型糖尿病患者升高 ,在糖尿病大血管病变患者进一步显著升高。糖尿病患者普遍存在着内皮功能受损。结论　内皮功能受损是糖尿病血管病变的始动因素 ,ECE改变与 2型糖尿病大血管病变密切相关。目的　探讨内皮素转换酶 (ECE)、内皮功能改变与 2型糖尿病大血管病变的关系。方法　应用RT PCR技术对 2型糖尿病患者 40例、2型糖尿病并大血管病变患者 6 0例及正常对照组6 0例进行了ECEmRNA水平、ECE活性测定 ,内皮功能检测。结果　ECEmRNA水平、ECE活性在2型糖尿病患者升高 ,在糖尿病大血管病变患者进一步显著升高。糖尿病患者普遍存在着内皮功能受损。结论　内皮功能受损是糖尿病血管病变的始动因素 ,ECE改变与 2型糖尿病大血管病变密切相关。

The relationship between endothelin-converting enzyme-endothelin system and type 2 diabetes with macroangiopathy

Objective To determine the endothelial function, endothelin-converting enzyme (ECE) activity and ECE mRNA level in patients of diabetes with macroangiopathy, and to investigate the effect of the endothelial function change in type 2 diabetes and diabetes with macroangiopathy. Methods Sixty healthy persons and 40 patients of type 2 diabetes and 60 patients of type 2 diabetes with macroangiopathy were recruited for the study. The activity of ECE in white blood cells was measured by an established method. Endothelial function, ECE activity and expression of ECE mRNA were determined by ELISA, RIA and RT-PCR respectively. Results The expression of ECE mRNA and the ECE activity were increased in patients of type 2 diabetes, especially in diabetics with macroangiopathy. The damage of endothelial function in the diabetic patients was very common. Conclusion High level of ECE activity relates to the damage of endothelial function. High level of ECE activity and up-regulation of expression of ECE mRNA may play a key role in the development of diabetic macroangiopathy.