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Abstract Title:

Docosahexaenoic acid enrichment in NAFLD is associated with improvements in hepatic metabolism and hepatic insulin sensitivity: a pilot study.

Abstract Source:

Eur J Clin Nutr. 2017 Mar 15. Epub 2017 Mar 15. PMID: 28294174

Abstract Author(s):

L Hodson, L Bhatia, E Scorletti, D E Smith, N C Jackson, F Shojaee-Moradie, M Umpleby, P C Calder, C D Byrne

Article Affiliation:

L Hodson

Abstract:

BACKGROUND/OBJECTIVE: Treatment of subjects with non-alcoholic fatty liver disease (NAFLD) with omega-3 polyunsaturated fatty acids (FAs) suggests high levels of docosahexaenoic acid (DHA) tissue enrichment decrease liver fat content. We assessed whether changes in erythrocyte DHA enrichment (as a surrogate marker of changes in tissue enrichment) were associated with alterations in hepatic de novo lipogenesis (DNL), postprandial FA partitioning and hepatic and peripheral insulin sensitivity in a sub-study of the WELCOME trial (Wessex Evaluation of fatty Liver and Cardiovascular markers in NAFLD (non-alcoholic fatty liver disease) with OMacor thErapy).

SUBJECTS/METHODS: Sixteen participants were randomised to 4 g/day EPA+DHA (n=8) or placebo (n=8) for 15-18 months and underwent pre- and post-intervention measurements. Fasting and postprandial hepatic FA metabolism was assessed using metabolic substrates labelled with stable-isotope tracers ((2)H2O and [U(13)C]palmitate). Insulin sensitivity was measuredby a stepped hyperinsulinaemic-euglycaemic clamp using deuterated glucose. Participants were stratified according to change in DHA erythrocyte enrichment (

RESULTS: Nine participants were stratified to DHA⩾2% (eight randomised to EPA+DHA and one to placebo) and seven to the DHA<2% group (all placebo). Compared with individuals with erythrocyte<2% change in DHA abundance, those with⩾2% enrichment had significant improvements in hepatic insulin sensitivity, reduced fasting and postprandial plasma triglyceride concentrations, decreased fasting hepatic DNL, as well as greater appearance of (13)C from dietary fat into plasma 3-hydroxybutyrate (all P<0.05).

CONCLUSIONS: The findings from our pilot study indicate that individuals who achieved a change in erythrocyte DHA enrichment⩾2% show favourable changes in hepatic FA metabolism and insulin sensitivity, which may contribute to decreasing hepatic fat content.European Journal of Clinical Nutrition advance online publication, 15 March 2017; doi:10.1038/ejcn.2017.9.

Study Type : Human Study

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Sayer Ji
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