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Changes in rat liver mitochondrial lipids in vitamin A deficiency

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Abstract

The alterations in the lipid profiles of rat liver mitochondria due to vitamin A deficiency were studied. The amount of total lipids and phospholipids were decreased with a concomitant increase in triglycerides and cholesterol levels in mitochondria, isolated from vitamin A-deficient animals. Of particular significance was the observation that the content of lysolecithin, a potent cytolytic agent, was increased. An analysis of individual fatty acids showed that the percentage of polyunsaturated fatty acids was decreased significantly in vitamin A deficiency. Further, mitochondria from vitamin A-deficient animals, when incubated in 0.1 M Tris-HCl buffer (pH 7.4)in vitro, produced increased amounts of malondialdehyde and lipofuchsin pigments indicating increased susceptibility of the mitochondrial membrane to peroxidative damage. These results suggest a possible role of vitamin A in the prevention of the decomposition of structural lipids.

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Abbreviations

TLC:

Thin layer chromatography

GLC:

gas-liquid chromatography

TBA:

thio-barbuturic acid

PUFA:

polyunsaturated fatty acids

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Mullick, R.S., Adhikari, H.R. & Vakil, U.K. Changes in rat liver mitochondrial lipids in vitamin A deficiency. J Biosci 5, 243–251 (1983). https://doi.org/10.1007/BF02716607

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  • DOI: https://doi.org/10.1007/BF02716607

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