Construction of cellular models with different PNPLA3 overexpression (PNPLA3WT, PNPLA3I148M, and PNPLA3control). A-C. Respectively represented the green fluorescent protein expression under fluorescent microscope for PNPLA3WT, PNPLA3I148M, and PNPLA3control cells (magnification: 200×); D-F. Respectively showed the genotype of PNPLA3WT, PNPLA3I148M, and PNPLA3control detected by direct sequen (base composition in “O” represented the variant genotype in PNPLA3I148M position); G. Showed quantitative analysis of PNPLA3 expression in cells with different PNPLA3 trans-infection; H. Showed results of western blot assay for PNPLA3 expression in PNPLA3WT, PNPLA3I148M, and PNPLA3control cells; I. Showed quantitative analysis of relative expression for PNPLA3 encoded ADPN in PNPLA3WT, PNPLA3I148M, and PNPLA3control cells. Relative ADPN expression in western blot assay was expressed as the ratio of ADPN to GAPDH as internal reference. *Represented significant difference across cells with different PNPLA3 expression in the same extent of FFA exposure (P<0.05); Data was expressed as means ± standard error of three independent experiments. ADPN: adiponutrin.