6533b85cfe1ef96bd12bd635

RESEARCH PRODUCT

Adrenic acid Δ4 desaturation and fatty acid composition in liver microsomes of spontaneously diabetic Wistar BB rats

David F. HorrobinMichel NarceMichel NarceY. S. HuangVirginie MimouniJ.-p. Poisson

subject

Blood GlucoseFatty Acid DesaturasesMaleErucic Acidsmedicine.medical_specialtymedicine.medical_treatmentLinoleic acidClinical BiochemistryBiologychemistry.chemical_compoundInternal medicineDiabetes mellitusmedicineAnimalsInsulinRats Inbred BBFatty acid metabolismInsulinFatty AcidsCell BiologyMetabolismmedicine.diseaseRatsDiabetes Mellitus Type 1EndocrinologychemistryErucic acidFatty Acids UnsaturatedMicrosomes LiverMicrosomeDocosapentaenoic acid

description

We examined the delta 4 (n-6) desaturation and the fatty acid composition of liver microsomes in the insulin-dependent spontaneously diabetic Wistar Bio-Breeding (BB) rat. The desaturation of adrenic acid to n-6 docosapentaenoic acid was decreased in the normo- and hyperglycemic diabetic rats. Insulin treatment with 1.0 IU. 100 g body weight-1 twice a day for 2 days restored the reduced activity during the hypoglycemic period. The pattern of responses was similar to that of linoleic acid delta 6 and dihomo-gamma-linolenic acid delta 5 desaturases, with a non-parallel relationship between the desaturation system and the glycemia. The microsomal fatty acid composition of BB rat liver reflected only partially to the delta 4 desaturation at different states of glycemia. Factors other than impaired desaturation system are involved in the fatty acid metabolism of spontaneously diabetic rats.

https://doi.org/10.1016/0952-3278(94)90104-x