Alpha-tocopherol: effect on plasma lipoproteins in hypercholesterolemic patients

Area of Science:

• Cardiovascular Health
• Nutritional Science
• Biochemistry

Background:

• Hypercholesterolemia is a significant risk factor for coronary heart disease (CHD).
• The ratio of total cholesterol to high-density lipoprotein cholesterol (TC/HDLC) is a key indicator of cardiovascular risk.
• Vitamin E (dl-alpha-tocopheryl acetate) is an antioxidant with potential lipid-modulating effects.

Purpose of the Study:

• To investigate the effect of vitamin E on HDLC levels.
• To assess the impact of vitamin E on the TC/HDLC ratio and overall coronary risk profile.
• To evaluate changes in apolipoproteins A and B in response to vitamin E therapy.

Main Methods:

• A double-blind, randomized, placebo-controlled trial.
• 69 hypercholesterolemic patients received either 500 IU/day of vitamin E or a placebo for 3 months.
• Measurements included HDLC, total cholesterol (TC), and apolipoprotein levels.

Main Results:

• Vitamin E significantly increased HDLC by 13.6% (P < 0.05) compared to placebo.
• The TC/HDLC ratio decreased by 23% in the vitamin E group versus 9.1% in the placebo group.
• Vitamin E administration led to a significant increase in apolipoprotein A and a decrease in apolipoprotein B, improving the Apo A/Apo B ratio.

Conclusions:

• Oral vitamin E supplementation (500 IU/day) is beneficial for hypercholesterolemic patients.
• Vitamin E improves key markers of coronary heart disease risk, including HDLC levels and the TC/HDLC ratio.
• Vitamin E may serve as a valuable therapeutic agent for managing hyperlipoproteinemia and reducing cardiovascular risk.