ABSTRACT
OBJECTIVES: Although pre-clinical studies have shown a beneficial impact of omega-3 (n-3) polyunsaturated fatty acids (PUFAs) on adipose (AT) inflammation, the current literature from human studies is limited. Therefore, we aimed to evaluate the longitudinal associations of circulating levels of n-3 PUFAs with biomarkers of AT inflammation. METHODS: Longitudinal data from participants in the PROMISE cohort (n = 474) were used. AT inflammation was measured using circulating biomarkers at baseline and up to 2 follow-up visits. n-3 PUFAs were measured at baseline in four serum lipid fractions. Generalized estimating equations (GEE) analyses evaluated longitudinal associations between n-3 PUFAs and AT inflammation, adjusting for covariates. RESULTS: Fully adjusted GEE models indicated that higher baseline proportions of eicosapentaenoic acid (EPA), n-3 docosapentaenoic acid (n-3 DPA), and docosahexaenoic acid (DHA) in total serum were significantly inversely associated with longitudinal change in soluble CD163 (sCD163) (all p < 0.05). A significant positive association of n-3 DPA and DHA with longitudinal change in adiponectin (p < 0.05) was also observed. Generally consistent associations were observed between n-3 PUFAs and sCD163 and adiponectin in the four lipid fractions. CONCLUSIONS: These findings will add to the limited evidence on the potential role n-3 PUFAs have in the prevention and management of AT inflammation in humans and may help inform future interventions targeting chronic inflammation at the level of AT.
