Eicosapentaenoic and Docosahexaenoic Acid Ethyl Esters Differentially Enhance B-cell Activity in Murine Obesity

Overview

Journal J Lipid Res

Publisher Elsevier

Specialty Biochemistry

Date 2014 May 20

PMID 24837990

Citations 37

Authors

Heather Teague

Mitchel Harris

Jenifer Fenton

Perrine Lallemand

Brian M Shewchuk

Saame Raza Shaikh

Affiliations

Soon will be listed here.

Abstract

EPA and DHA are not biologically equivalent; however, their individual activity on B cells is unknown. We previously reported fish oil enhanced murine B-cell activity in obesity. To distinguish between the effects of EPA and DHA, we studied the ethyl esters of EPA and DHA on murine B-cell function as a function of time. We first demonstrate that EPA and DHA maintained the obese phenotype, with no improvements in fat mass, adipose inflammatory cytokines, fasting insulin, or glucose clearance. We then tested the hypothesis that EPA and DHA would increase the frequency of splenic B cells. EPA and DHA differentially enhanced the frequency and/or percentage of select B-cell subsets, correlating with increased natural serum IgM and cecal IgA. We next determined the activities of EPA and DHA on ex vivo production of cytokines upon lipopolysaccharide stimulation of B cells. EPA and DHA, in a time-dependent manner, enhanced B-cell cytokines with DHA notably increasing IL-10. At the molecular level, EPA and DHA differentially enhanced the formation of ordered microdomains but had no effect on Toll-like receptor 4 mobility. Overall, the results establish differential effects of EPA and DHA in a time-dependent manner on B-cell activity in obesity, which has implications for future clinical studies.

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