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Lipid peroxidation and altered vascular function in vitamin E-deficient rats
C A Hubel1, K C Griggs, M K McLaughlin
1Department of Obstetrics and Gynecology, University of Vermont College of Medicine, Burlington 05405.
The American Journal of Physiology
|June 1, 1989
Summary
Vitamin E deficiency in rats led to increased lipid peroxidation and altered vascular function, evidenced by impaired artery relaxation and endothelial damage. This highlights the role of vitamin E in maintaining cardiovascular health.
Area of Science:
- Cardiovascular Science
- Nutritional Biochemistry
Background:
- Dietary vitamin E deficiency is linked to oxidative stress.
- Oxidative stress can impact vascular health.
Purpose of the Study:
- To investigate the effects of vitamin E deficiency on vascular function in rats.
- To explore the relationship between lipid peroxidation and vascular dysfunction.
Main Methods:
- Female rats were fed a vitamin E-deficient diet for 35 weeks.
- Vascular responses, blood pressure, and lipid peroxidation markers were assessed.
- Scanning electron microscopy examined endothelial structure.
Main Results:
- Vitamin E deficiency increased lipid peroxidation markers in aorta, liver, and plasma.
- Deficient rats showed an enhanced pressor response to angiotensin II.
- Acetylcholine-induced relaxation of mesenteric arteries was significantly reduced.
- Endothelial surface blebbing was observed in femoral arteries.
Conclusions:
- Vitamin E deficiency impairs vascular endothelial function.
- Increased lipid peroxidation is associated with altered vascular responses.
- Dietary vitamin E is crucial for maintaining vascular integrity and function.