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Journal of Lipid Research, Vol 19, 332-334, Copyright © 1978 by Lipid Research, Inc.

ARTICLES

Effect of hypervitaminosis A on hemolysis and lipid peroxidation in the rat

VN Kartha and S Krishnamurthy

Erythrocytes from rats fed large doses of Vitamin A alone, or large doses of vitamin A and vitamin E or diphenyl-p-phenylene diamine (DPPD) were studied for H2O2-induced hemolysis. The vitamin A-dosed rats were more susceptible than normal rats to H2O2-induced hemolysis. Hemolysis was not accompanied by lipid peroxidation. Nevertheless, the antioxidants vitamin E and DPPD inhibited hemolysis in erythrocytes from vitamin A-dosed rats. These antioxidants had the same inhibitory effect when they were included in the diet or added to erythrocyte suspensions in vitro. Erythrocytes from vitamin A-dosed rats with or without added vitamin E or DPPD were less susceptible than the erythrocytes from normal rats to osmotic challenge, showing that vitamin A was present in levels sufficient to alter the structure of the erythrocyte membrane. These studies show that oxidative hemolysis occurs when the erythrocyte membrane is modified. Furthermore, this oxidative hemolysis is unrelated to lipid peroxidation.
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