Proceedings of the National Academy of Sciences · 1983 · 187 citations · 22 references
Life SciencesEndocrinologyPhysiologyDiabetologyLipid BiochemistryMetabolic RegulationDiabetes MellitusDiabetes Mellitus BiochemistryEssential Fatty AcidsFatty Acid ChemistryFatty Acid MetabolismLipid MetabolismDesaturase EnzymesFatty Acid Desaturase RegulationFatty AcidsOmega-3 Fatty Acid MetabolismOmega-3 Fatty AcidsOmega-6 Fatty Acid MetabolismOmega-6 Fatty AcidsUnsaturated Fatty Acids
Fatty acid compositions of phospholipids of heart, liver, kidney, aorta, and serum from rats having streptozotocin-induced diabetes were determined and compared with those of nondiabetic controls. Linoleic and dihomo-gamma-linolenic acids were increased whereas arachidonic acid was decreased in most tissues, suggesting an impairment of delta 5-desaturase activity. Acids derived from linolenic acid were increased in some diabetic tissues from diabetic animals although the linolenic content was normal, indicating less impairment in the desaturation of the omega 3 series of fatty acids. Diabetes suppressed all polyunsaturated acids in the whole animal, but the competition between omega 3 and omega 6 acids favored the excessive suppression of long-chain omega 6 acids and an increase in the proportion of omega 3 acids in lipids of vital tissues. These changes in fatty acid composition of the phospholipids may have significant effects on cellular functions and vasoregulatory control mechanisms in diabetes.
22