Fatty acids and gene expression responses to bioactive compounds in Atlantic salmon (Salmo salar L.) hepatocytes.

Objectives: Effects of bioactive compounds on expression of genes involved in lipid metabolism and fatty acid composition were investigated in Atlantic salmon (Salmo salar L.) primary hepatocytes.

Methods: Five treatments were investigated: I) genistein 0.005 mM, II) genistein 0.025 mM, III) lipoic acid 0.2 mM, IV) sesamin/episesamin 0.05 mM, V) sesamin 0.05 mM and compared to controls. The relative expression of genes involved in lipid homeostasis was analysed after 12h and 48h.

Results: Incubation with lipoic acid, sesamin and episesamin/sesamin for 48h had significant effect on all analysed genes involved in lipid uptake, β-oxidation, elongation and desaturation, some effects were detected on the expression of peroxisome prolifertor-activated receptor (PPARs). Also effects on the fatty acid composition were found.

Conclusion: The strongest effect of bioactive copounds on hepatocyte gene expression was detected after 48 hours.