2021•Journal of Agricultural and Food ChemistryRequires access

Different Influences of trans Fatty Acids on the Phospholipase A2 and Arachidonic Acid Metabolic Pathway in Hepatocytes

Qian Zou, Teng Wei, Niu Zhang, Niu Xian, Chen Hsun Weng, Zeyuan Deng, Jing Li

Abstract

This study investigated the effects of 9t18:1 (representing I-TFAs), 9t16:1, and 11t18:1 (representing R-TFAs) and their mixtures on the normal human hepatocyte LO2 cell function, the possible mechanism of lipid metabolism by lipidomics, and the relationship between phospholipase A2 (PLA2) and the arachidonic acid (AA) metabolic pathway. Here, we found that the damaging effect of 9t18:1 on the LO2 cell function was significantly greater than those of 11t18:1 and 9t16:1 ( p < 0.05), and the damaging effects of CHB and HSO were significantly greater than those of HHB and CM ( p < 0.05). The lipidomic results showed that TFAs and TFA mixtures caused a significant change in the lipid profiles of LO2 cells, in which the TAG, PL, and OL contents increased significantly. Moreover, 9t18:1 regulated only the protein expression of cPLA2 but did not participate in the AA metabolic pathway, while 11t18:1 and 9t16:1 participated in the COX-2 and CYP450 pathways, respectively.

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Available abstract

Key concepts: Arachidonic acid, Phospholipase A2, Lipidomics, Phospholipase, Metabolic pathway, Lipid signaling, Arachidonic acid metabolism, Hepatocyte