Abstract
We investigated the efficacy of supplementing the diet with pteroylmonoglutamic acid (PGA), choline, or phosphatidylcholine (PC) in ameliorating the lipid accumulation in rat liver that is induced by vitamin B6 (B6) deficiency. In Experiment 1, male Wistar rats were fed a control, B6-deficient, or PGA-, choline-, or PC-supplemented (10 mg, 4 g, and 6.3 g/kg of diet, respectively) B6-deficient diet containing l-methionine at 9 g/kg of diet for 35 days. In Experiment 2, rats were fed a control, B6-deficient, or PC-supplemented (at 3.15, 6.3, or 12.6 g PC/kg of diet) B6-deficient diet for 35 days. Choline or PC supplementation ameliorated liver lipid deposition and returned plasma lipids to normal. Judging from these results, it appeared that B6 deficiency decreased the synthesis of PC in the liver, thereby decreasing the secretion of very low-density lipoproteins, and in consequence producing lipid accumulation in the liver and reductions of plasma lipids.
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