Highly Up-Regulation of Fas Ligand Gene Expression after Increasing in Oxidized Low-Density Lipoprotein

Oxidized low-density lipoprotein (ox-LDL) shows many harmful effects such as induction of apoptosis on function of endothelial cell (EC). Fas ligand (FASL) induces apoptosis in divergent pathological conditions. EC apoptosis which induced by ox-LDL is related with FASL. In this study, we aimed to determine how different ox-LDL levels affect FASL expression in ECs. We treated human umbilical vein endothelial cells (HUVECs) with two different concentration of ox-LDL. FASL gene expression in groups was detected by quantitative polymerase chain reaction (qPCR). We compared FASL gene expression level between the groups according to ∆∆Ct method. FASL gene expression was statistic significantly up-regulated in the group treated higher amounts of ox-LDL (P<0.001). We found that treatment with higher amounts of ox-LDL in HUVECs increased FASL gene expression dramatically. According to our findings, we concluded that increasing the amount of ox-LDL may be critical in inducing the FASL-dependent apoptotic pathway in ECs.