Bifidobacterium breve with a-linolenic acid alters the composition, distribution and transcription factor activity associated with metabolism and absorption of fat
Ross, R. Paul
Dinan, Timothy G.
Cryan, John F.
Fitzgerald, Gerald F.
Quigley, Eamonn M.
This study focused on the mechanisms that fatty acid conjugating strains - Bifidobacterium breve NCIMB 702258 and Bifidobacterium breve DPC 6330 - influence lipid metabolism when ingested with α-linolenic acid (ALA) enriched diet. Four groups of BALB/c mice received ALA enriched diet (3% (w/w)) either alone or in combination with B. breve NCIMB 702258 or B. breve DPC 6330 (109 CFU/day) or unsupplemented control diet for six weeks. The overall n-3 PUFA score was increased in all groups receiving the ALA enriched diet. Hepatic peroxisomal beta oxidation increased following supplementation of the ALA enriched diet with B. breve (P < 0.05) and so the ability of the strains to produce c9t11 conjugated linoleic acid (CLA) was identified in adipose tissue. Furthermore, a strain specific effect of B. breve NCIMB 702258 was found on the endocannabinoid system (ECS). Liver triglycerides (TAG) were reduced following ALA supplementation, compared with unsupplemented controls (P < 0.01) while intervention with B. breve further reduced liver TAG (P < 0.01), compared with the ALA enriched control. These data indicate that the interactions of the gut microbiota with fatty acid metabolism directly affect host health by modulating n-3 PUFA score and the ECS.
Applied microbiology , Clinical microbiology , Experimental models of disease
Patterson, E., Wall, R., Lisai, S., Ross, R. P., Dinan, T. G., Cryan, J. F., Fitzgerald, G. F., Banni, S., Quigley, E. M., Shanahan, F. and Stanton, C. (2017) 'Bifidobacterium breve with α-linolenic acid alters the composition, distribution and transcription factor activity associated with metabolism and absorption of fat', Scientific Reports, 7, pp. 43300. doi:10.1038/srep43300
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