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American Journal of Clinical Nutrition, Vol 53, 483-490, Copyright © 1991 by The American Society for Clinical Nutrition, Inc

ORIGINAL RESEARCH COMMUNICATIONS

Retina fatty acid composition of piglets fed from birth with a linoleic acid-rich vegetable-oil formula for infants

N Hrboticky, MJ MacKinnon and SM Innis
Department of Paediatrics, Faculty of Medicine, University of British Columbia, Vancouver, Canada.

The effects of a vegetable-oil-based formula containing 30% 18:2n-6 (18:2 omega-6), 0.8% 18:3n-3, and no n-6 or n-3 long-chain polyunsaturated fatty acids (LCPs) on retina total lipid, ethanolamine phosphoglyceride (EPG), and phosphatidylcholine (PC) fatty acid composition were studied in neonatal piglets. Term-gestation piglets were fed sow milk (SMF) or the formula (FF) from birth for 5, 10, 15, or 25 d. After 25 d feeding, the 22:6n-3 was reduced by 24% in total lipid, 20% in EPG, and 28% in PC of retinas of FF relative to SMF piglets. A compensatory increase in 22:4n-6 and 22:5n-6 concentrations occurred in retina total lipid, EPG, and PC of FF animals. The data suggest that the exclusive feeding of formulas devoid of LCPs and high in 18:2n-6 and/or 18:2n-6 and 18:3n-3 compromises normal accretion of 22:6n-3 in neonatal piglet retina. The potential reversibility of these changes or their effects on vision are not known.


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Copyright © 1991 by The American Society for Nutrition