PMID- 27247346 OWN - NLM STAT- MEDLINE DCOM- 20170824 LR - 20210217 IS - 1539-7262 (Electronic) IS - 0022-2275 (Print) IS - 0022-2275 (Linking) VI - 57 IP - 7 DP - 2016 Jul TI - Effects of dietary carbohydrate on hepatic de novo lipogenesis in European seabass (Dicentrarchus labrax L.). PG - 1264-72 LID - 10.1194/jlr.M067850 [doi] AB - Farmed seabass have higher adiposity than their wild counterparts and this is often attributed to carbohydrate (CHO) feeding. Whether this reflects a reduction in fat oxidation, increased de novo lipogenesis (DNL), or both, is not known. To study the effects of high CHO diets on hepatic TG biosynthesis, hepatic TG deuterium ((2)H) enrichment was determined following 6 days in (2)H-enriched tank water for fish fed with a no-CHO control diet (CTRL), and diets with digestible starch (DS) and raw starch (RS). Hepatic fractional synthetic rates (FSRs, percent per day(-1)) were calculated for hepatic TG-glyceryl and FA moieties through (2)H NMR analysis. Glyceryl FSRs exceeded FA FSRs in all cases, indicating active cycling. DS fish did not show increased lipogenic potential compared to CTRL. RS fish had lower glyceryl FSRs compared with the other diets and negligible levels of FA FSRs despite similar hepatic TG levels to CTRL. DS-fed fish showed higher activity for enzymes that can provide NADPH for lipogenesis, relative to CTRL in the case of glucose-6-phosphate dehydrogenase (G6PDH) and relative to RS for both G6PDH and 6-phosphogluconate dehydrogenase. This approach indicated that elevated hepatic adiposity from DS feeding was not attributable to increased DNL. CI - Copyright (c) 2016 by the American Society for Biochemistry and Molecular Biology, Inc. FAU - Viegas, Ivan AU - Viegas I AUID- ORCID: 0000-0003-2589-2212 AD - Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal Center for Functional Ecology, Department Life Sciences, University of Coimbra, 3000-456 Coimbra, Portugal iviegas@ci.uc.pt. FAU - Jarak, Ivana AU - Jarak I AD - Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal. FAU - Rito, Joao AU - Rito J AD - Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal Center for Functional Ecology, Department Life Sciences, University of Coimbra, 3000-456 Coimbra, Portugal. FAU - Carvalho, Rui A AU - Carvalho RA AD - Center for Functional Ecology, Department Life Sciences, University of Coimbra, 3000-456 Coimbra, Portugal. FAU - Meton, Isidoro AU - Meton I AD - Seccio de Bioquimica i Biologia Molecular, Departament de Bioquimica i Fisiologia, Facultat de Farmacia, Universitat de Barcelona, 08028 Barcelona, Spain. FAU - Pardal, Miguel A AU - Pardal MA AD - Center for Functional Ecology, Department Life Sciences, University of Coimbra, 3000-456 Coimbra, Portugal. FAU - Baanante, Isabel V AU - Baanante IV AD - Seccio de Bioquimica i Biologia Molecular, Departament de Bioquimica i Fisiologia, Facultat de Farmacia, Universitat de Barcelona, 08028 Barcelona, Spain. FAU - Jones, John G AU - Jones JG AD - Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20160531 PL - United States TA - J Lipid Res JT - Journal of lipid research JID - 0376606 RN - 0 (Dietary Carbohydrates) RN - 0 (Dietary Fats) RN - 0 (Triglycerides) SB - IM MH - Animals MH - Bass/*metabolism MH - Dietary Carbohydrates/administration & dosage MH - Dietary Fats/administration & dosage MH - Lipogenesis/drug effects/*physiology MH - Liver/drug effects/*metabolism MH - Triglycerides/*metabolism PMC - PMC4918855 OTO - NOTNLM OT - carbohydrate metabolism OT - dehydrogenases OT - deuterated water OT - fish aquaculture OT - lipolysis and fatty acid metabolism OT - liver OT - nuclear magnetic resonance OT - nutrition/carbohydrate EDAT- 2016/06/02 06:00 MHDA- 2017/08/25 06:00 PMCR- 2017/07/01 CRDT- 2016/06/02 06:00 PHST- 2016/03/22 00:00 [received] PHST- 2016/06/02 06:00 [entrez] PHST- 2016/06/02 06:00 [pubmed] PHST- 2017/08/25 06:00 [medline] PHST- 2017/07/01 00:00 [pmc-release] AID - S0022-2275(20)35162-2 [pii] AID - m067850 [pii] AID - 10.1194/jlr.M067850 [doi] PST - ppublish SO - J Lipid Res. 2016 Jul;57(7):1264-72. doi: 10.1194/jlr.M067850. Epub 2016 May 31.