Down-regulation of stearoyl-CoA desaturase-1 increases susceptibility to palmitic-acid-induced lipotoxicity in human trophoblast cells.
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In early pregnancy, adequate dietary factors are important for the growth of human trophoblast cells, followed by placental development. Although stearoyl-CoA desaturase 1 (SCD1) is expected to relieve palmitic acid (PA)-induced lipotoxicity by regulating diacylglycerol and ceramide, its function is unclear in human trophoblast cells. The aim was to investigate inhibitory effects of SCD1 activity on PA-induced trophoblast cell death. PA induces cell death and inhibits the invasion of human trophoblast cells (HTR8/SVneo). In addition, we demonstrate that SCD1 has a protective role against PA in human trophoblast cells by regulating AKT-mediated signaling pathway and mitochondrial membrane potential. The knockdown of SCD1 enhances the proapoptotic activity of PA in HTR8/SVneo cells. Lastly, we investigated microRNA expression predicted to target SCD1 and diacylglycerol O-acyltransferase 1 (DGAT1) by PA. Collectively, the results suggest potential roles of SCD1 and DGAT1 in alleviating the toxicity of PA and maintaining lipid homeostasis for normal placentation.
author list (cited authors)
Yang, C., Lim, W., Bazer, F. W., & Song, G.
complete list of authors
Yang, Changwon||Lim, Whasun||Bazer, Fuller W||Song, Gwonhwa