Abstract

Background. Creatine monohydrate has beneficial effects on serum glucose. This study aimed to investigate the effects of creatine on serum biochemical markers and permeability of coronary arteries among diabetic rats. Material and Methods. 32 Wistar rats, which weighed 150-200 grams were randomly divided into 4 groups including: group I, control; group II, creatine monohydrate; group III, diabetic rats; and group IV, diabetic rats + creatine. Creatine monohydrate was applied by 400 mg/kg/daily for 5 months. Animals' weights and blood samples were taken before and after the study. Endothelial permeability rate was measured by Evans Blue method. Data were analysed by SPSS 16. Results. At the end of fifth month, rats' weights in diabetic group under treatment with creatine, compared to those without, increased significantly (p<0.0001). Also, the serum levels of triglyceride (TG), cholesterol, glucose and low density lipoprotein (LDL)-cholesterol decreased significantly among those under treatment with creatine (p<0.05), but high density lipoprotein (HDL)-cholesterol increased significantly (p<0.002). Permeability rate of coronary arteries was reduced significantly in the diabetic group treated by creatine compared to untreated groups, closed to the intact group (p<0.001). Conclusion. Results of this study showed that creatine monohydrate caused an improvement of serum biochemical markers associated with diabetes and reduced the permeability rate of coronary arteries among diabetic rats.