The effects of rosiglitazione on renal artery endothelium in diabetic rats.

Background: Macrovascular disease is a common complication of Diabetes Mellitus (DM). Study of renal artery endothelium may serve as a surrogate for cardiovascular and renal vascular disease.

Object: This study is to elucidate (1) how about the changes of renal endothelial ultrastructures it is in different time of diabetes animals (2) Whether PPARgamma ligand (such as rosiglitazone: ROS) could improve endothelium destruction in diabetes.

Methods: Streptozoticin (STZ) induced diabetic rats were stratified by age groups from 6 to 10 weeks of age and were paired with age-matched control non-diabetic rats. Further, another group of diabetic rats were treated with ROS and matched with non-treated diabetic rats.

Result: The renal artery endothelium of diabetic rats was partially coarse, distended, cracked and destroyed. The Vascular Endothelial Structure Score (VESS) was 34.5 in diabetic rats compared with non-diabetic control male rats (P=0.001). The older rats demonstrated more endothelial wall damage, more pronounced in male rats. Compared with non-treated control diabetic rats, ROS prevented diabetic endothelial damage (VESS=4.6, P=0.001).

Conclusion: Renal artery endothelium damage in STZ induced diabetic rats was significantly attenuated by rosiglitazone.