L-精氨酸对糖尿病患者血管内皮功能的保护作用

目的研究L-精氨酸对糖尿病引起的血管内皮功能损伤的保护作用和意义。方法将60例糖尿病患者随机分为安慰剂对照组（n=30）和L-精氨酸治疗组（n=30）。L-精氨酸对照组给予口服精氨酸7g每天。两组治疗28d后再过7d的药物洗脱期。在治疗前和治疗后测定两组患者血浆一氧化氮（NO）、内皮素（ET）、血管性血友病因子（vWF）浓度及检测肱动脉血流介导的扩张反应（FMD），并进行分析。结果L精氨酸治疗组较安慰剂对照组，血浆NO浓度升高，vWF和ET水平下降，差异有统计学意义（P〈0．05）。同时L精氨酸治疗的FMD较对照组明显升高（P〈0．05）。结论L-精氨酸可影响血管内皮活性物质，影响血管内皮的收缩舒张作用，从而对高血糖伴随的血管损伤有保护作用。

Protective effects of L-Arginine in the diabetic vascular dysfunction

Objective To explore the effects of L-Arginine on diabetic vascular endothelial function. Methods 60 patients with Diabetes were randomly divided into two group:placebo control group(30 patients)and L-Arginine group(30 patients). Patients in L-Arginine group were taken L-Arginine 7g a day. All patients were treated for 28days and other 7days for elution. The plasma concentration of nitric oxide(NO) and endothelin (ET), vWF were measured in each group before and after the experiment. Flow Mediated Dilation(FMD) function of brachial artery of all patients were measured by high resolution vascular ultrasound. Results After the experiment, the plasma concentration of NO in L-Arginine group was higher than that of placebo group, meanwhile the plasma concentration of ET and vWF were lower than placebo group (P ＜ 0. 05). Moreover, FDM in L-Arginine group were significant higher than placebo group(P ＜ 0. 05). Conclusion L-Arginine could protect the vascular function in the diabetic patients.