AIM: To observe whether the protection of aminoguanidine (Ami) combined with vitamin C (Vit C) on aorta is achieved by inhibiting oxidative stress and glycosylation in streptozotocin-induced diabetic rats. METHODS: Type 1 diabetic rats, induced by ip injection of streptozotocin, were treated with ig Ami 100 mg • kg-1, Vit C 100 mg • kg-1 and Vit C 100 mg • kg-1 + Ami 100 mg • kg-1, respectively, once daily for 16 weeks. During and after the treatment, the levels of blood sugar, triglyceride, total cholesterol, low density lipoprotein (LDL),...