Protective Effect of Salvianolic Acid B in Goto-kakizaki Rats Complicated with Macroangiopathy / 中国药师

ABSTRACT

Objective:To study the protective effect and possible mechanism of salvianolic acid B in GK rats complicated with macroangiopathy. Methods:Totally 32 GK rats were randomly divided into four groups:the model group and low,middle and high dose salvianolic acid B groups(40,80 and 160 mg·kg - 1 ),and 8 Wistar rats were used as the normal group. All of GK rats were giv-en high-glucose and high-fat diet. After 16 weeks,GK rats were orally administrated with 10 mg·kg - 1 ·d - 1 N-ω-nitro-L-arginine methyl ester for 8 weeks. At the beginning and the end of the experiment,blood glucose and blood pressure were measured,abdominal aortic blood was collected after anesthesia,thoracic aorta was used to make paraffin sections after bloodletting to observe vasculopathy and the expression of VEGF was detected by Western-blot. Results:The blood glucose was increased in all GK rats with no statistical significance between the drug group and the model group(P > 0. 05). At the end of the experiment,the blood pressure was significant-ly increased in GK rats,indicating that salvianolic acid B could notably reduce the blood pressure in GK rats in a dose-dependent man-ner with statistical significance(P < 0. 05);and it could also remarkably reduce the total white blood cell count and differential blood count,and ameliorate the lesion extent and reduce VEGF expression. Conclusion:Salvianolic acid B has protective effects on aorta in GK rats,and its mechanism may be related with blood pressure lowering,anti-inflammation and reduction of VEGF expression.