Figure 6. PGC-1α positively regulate the TFEB in HK2 cells. (A) HK2 Cell lysates were immunoprecipitated (IP) with an anti-PGC-1α or an anti-TFEB antibody, then immunoblotted (IB) with TFEB and PGC-1α antibodies. Anti- IgG antibody as a negative control. (B, C) The expression of TFEB and PGC-1α was measured by western blotting. (D) Luciferase activity in HK-2 cells transfected with the TFEB promoter-reporter construct linked to luciferase along with PGC-1α plasmids or control empty vectors. (E) Representative immunofluorescence images of TFEB in HK2 cells. Scar bar: 20 μm. Data are provided as the mean ± SEM, n=3 independent experiments. *P < 0.05, **P < 0.01, ***P < 0.001 vs. overcon; #P < 0.05, ##P < 0.01, ###P < 0.001 vs sicon (Con, control; sicon, sicontrol; overcon, overcontrol).