Soluble adhesion molecules, endothelial function and vitamin E in type 1 diabetes.

Area of Science:

• Cardiovascular Research
• Endocrinology
• Nutritional Science

Background:

• Elevated soluble adhesion molecules are linked to vascular disease and atherosclerosis risk factors like diabetes.
• Oxidized LDL, protein kinase C, and low nitric oxide levels may influence adhesion molecule expression.
• Vitamin E's potential role in downregulating adhesion molecules was investigated, following prior findings of improved endothelial vasodilator function (EVF) with vitamin E in type-1 diabetes.

Purpose of the Study:

• To assess soluble adhesion molecule levels in young, uncomplicated type-1 diabetes patients.
• To determine correlations between soluble adhesion molecules, EVF, diabetes parameters, and lipid levels.
• To evaluate if vitamin E therapy, improving EVF, also reduces soluble adhesion molecule levels.

Main Methods:

• A randomized, placebo-controlled study design was employed.
• Soluble vascular cell adhesion molecule-1 (VCAM-1) and P-selectin levels were measured.
• Endothelial vasodilator function (EVF), lipid profiles, and diabetes duration were assessed.

Main Results:

• No significant difference in VCAM-1 or P-selectin levels was observed between diabetic and control groups.
• In diabetics, VCAM-1 correlated inversely with EVF and directly with total cholesterol, LDL cholesterol, and diabetes duration.
• Vitamin E supplementation did not alter VCAM-1 or P-selectin levels.

Conclusions:

• Young individuals with type-1 diabetes and no overt vascular disease do not exhibit elevated VCAM-1 or P-selectin levels.
• Vitamin E supplementation does not influence these soluble adhesion molecule levels in this population.