Abstract
Lipid metabolism, obesity and inflammation are intimately related. Plasma triglycerides increase during the inflammatory response to pathogens and obesity increases inflammatory stress. Pro-inflammatory cytokines are secreted by adipocytes in uninfected obese subjects. Polymorphisms (SNPs) in cytokine genes influence the intensity of cytokine production and inflammatory stress. Fish oil has lipid-lowering and anti-inflammatory properties. The influence of cytokine gene polymorphisms on the interaction between adiposity, inflammation and the properties of fish oil is unknown. Fasting plasma triglycerides, acute phase proteins and BMI were studied in 159 healthy men and the effect of 6 g/d fish oil for 12 weeks on the former two parameters studied. Subjects were genotyped for SNPs at positions -511, -174, +252 and -308 in the IL-1beta, IL-6, LT-alpha (TNF-beta) and TNF-alpha genes, respectively. Data were divided into three sub-groups of BMI, 16.7-22.8, 22.9-24.9 and 25.1-33.7 kg/m2, respectively. Correlations were apparent between CRP and triglycerides in the highest tertile r = 0.324, P < 0.05 and between CRP and serum amyloid in all tertiles. Mean concentrations of all three molecules were higher in the middle and highest tert...Continue Reading
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