Abstract
Dogs were born to mothers fed commercial diets low or enriched in n-3 fatty acids and raised on those diets until they were about 50 d old. Retinas were removed, lipids were extracted, and total phospholipids were anlyzed for fatty acid and molecular species composition. Animals from the low n-3 group had significantly lower retinal levels of 22∶6n-3 and higher levels of n-6 fatty acids, especially 20∶4n-6 and 22∶5n-6. There was no difference in the retinal levels of 18∶2n-6, and only small differences were found in saturated and monounsaturated fatty acids. The most dramatic differences in molecular species occurred in 22∶6n-3-22∶6n-3 (4.7 vs. 0.8%) and 18∶0-22∶6n-3 (27.6 vs. 14.4%); total molecular species containing 22∶6n-3 were significantly lower in the low n-3 group (45.5 vs. 24.0%). Molecular species containing 20∶4n-6 and 22∶5n-6 were greater in the low n-3 animals (13.0 vs. 25.7%), as were molecular species containing only saturated and monounsaturated fatty acids (40.8 vs. 35.4%). These results show that modest differences in the amount of n-3 fatty acids in the diets of dogs can have profound effects on the fatty acid and molecular species composition of their retinas.
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Abbreviations
- DGBZ:
-
diacylglyceroben Z Dates
- PUFA:
-
polyunsaturated fatty acid
- ROS:
-
rod outer segment
- TLC:
-
thin-layer chromatography
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Delton-Vandenbroucke, I., Maude, M.B., Chen, H. et al. Effect of diet on the fatty acid and molecular species composition of dog retina phospholipids. Lipids 33, 1187–1193 (1998). https://doi.org/10.1007/s11745-998-0322-7
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DOI: https://doi.org/10.1007/s11745-998-0322-7