title: A krill oil supplemented diet reduces the activities of the mitochondrial tricarboxylate carrier and of the cytosolic lipogenic enzymes in rats.
abstract: The mitochondrial tricarboxylate carrier supplies cytosol with the carbon units necessary for hepatic lipogenesis. The activities of cytosolic acetyl-CoA carboxylase and fatty acid synthetase are therefore strictly connected to the function of mitochondrial tricarboxylate carrier. Dietary polyunsaturated fatty acids (PUFA) are potent modulators of hepatic lipogenesis. In rats fed with a diet enriched with 2.5% krill oil (KO), a novel source of dietary n-3 PUFA, a time-dependent decrease in the activities of the mitochondrial tricarboxylate carrier and of the lipogenic enzymes was found. The KO induced inhibition of hepatic lipogenesis was more pronounced than that found in fish oil (FO)-fed rats, at least at short feeding times. The decrease in the activity of the mitochondrial tricarboxylate carrier caused by KO was due to a reduced expression of the protein. Furthermore, in the KO-fed animals a greater reduction in the levels of hepatic triglycerides and cholesterol was found in comparison to FO-fed rats.
authors.affiliation: Department of Biological and Environmental Sciences and Technologies, University of Salento, Lecce, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Ferramosca
authors.forename: L
authors.initials: L
authors.lastname: Conte
authors.forename: V
authors.initials: V
authors.lastname: Zara
mesh_terms: D000821:Animal Feed; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D001693:Biological Transport, Active; D002352:Carrier Proteins / Q000235:genetics / Q000378:metabolism*; D019343:Citric Acid / Q000378:metabolism; D003600:Cytosol; D004032:Diet; D033201:Euphausiacea / Q000737:chemistry*; D005395:Fish Oils / Q000737:chemistry / Q000494:pharmacology*; D005786:Gene Expression Regulation / Q000502:physiology; D050356:Lipid Metabolism / Q000187:drug effects / Q000502:physiology*; D008081:Liposomes; D008297:Male; D008930:Mitochondria, Liver / Q000187:drug effects* / Q000378:metabolism; D051381:Rats; D017208:Rats, Wistar
chemical_list: D002352:Carrier Proteins; D005395:Fish Oils; D008081:Liposomes; C020723:citrate-binding transport protein; D019343:Citric Acid