Ascorbic acid blocks hyperglycemic impairment of endothelial function in adolescents with type 1 diabetes

作者：Hoffman Robert P^*; Dye Amanda S; Bauer John A

来源：Pediatric Diabetes, 2012, 13(8): 607-610.

DOI：10.1111/j.1399-5448.2012.00882.x

• adolescents
• ascorbic acid
• endothelial function
• hyperglycemia
• type 1 diabetes

Objective To determine whether acute ascorbic acid infusions alter the effect of hyperglycemia on endothelial function in adolescents with type 1 diabetes. Research design and methods The forearm blood flow (FBF) reactive hyperemic response to 5?min of upper arm occlusion was studied in eight adolescents with type 1 diabetes during euglycemic and hyperglycemic insulin clamp (40?mU/m2/min) with and without ascorbic acid infusion (3?mg/min). Results The ratio of post- to preocclusion FBF decreased during hyperglycemia without ascorbic acid (p?=?0.013), but did not change during hyperglycemia with ascorbic acid. The changes during hyperglycemia were different between the two studies (p?=?0.038). Similar results were found when the percent change in forearm vascular resistance following occlusion was assessed. Conclusions These results indicate that antioxidant treatment with ascorbic acid blocks acute hyperglycemic impairment of endothelial function in adolescents with type 1 diabetes.

• 出版日期2012-12