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Human Nutrition Research Division, U. S. Department of Agriculture, Washington, D. C.
Reproductive performance and tissue lipid composition were studied in Sprague Dawley strain female rats fed from weaning diets containing 5% of corn oil, olive oil or HVO or 15% HVO, and deprived of vitamin B6 a minimum of three weeks prior to mating.
Although the differences were not statistically significant, animals fed corn oil tended to show an advantage over other deficient animals in reproductive performance, most importantly in the criterion of fetal weight. Mating performance of rats fed 15% HVO was somewhat less successful than animals fed 5% of either corn oil, olive oil or HVO, but not as poor as previously observed in another strain of animals.
Differences in organ lipid composition and serum glutamic oxalacetic transaminase (GOT) were related to type of dietary fat or to vitamin B6 deprivation. Serum cholesterol concentration was lower and liver cholesterol concentration higher in animals fed either level of HVO than in animals fed 5% of corn oil or olive oil. Cholesterol concentration of heart tissue was higher in vitamin B6-deficient mothers than in those fed the vitamin. Serum GOT was lower in vitamin B6-deficient animals than in animals fed pyridoxine, but there were no differences due to type of dietary fat.
The slight beneficial effect of corn oil on reproductive performance of vitamin B6-deficient female rats was not reflected either in organ lipid content or in serum glutamic oxalacetic transaminase.