Effects of DHA treatment, CaMKK2 siRNA, CaMKK2-OE and NCLX siRNA on ATP synthase expression. (A) Western blotting and protein expression levels of (B) ATP1A1, (C) ATP5H, (D) CaMKK2 and (E) NCLX in HepG2 cells transfected with CaMKK2 siRNA, CaMKK2-OE and NCLX siRNA and treated with DHA. (F) Western blotting and protein expression levels of (G) ATP1A1, (H) ATP5H, (I) CaMKK2 and (J) NCLX in HuH-7 cells transfected with CaMKK2 siRNA, CaMKK2-OE and NCLX siRNA and treated with DHA. All data are presented as the mean ± standard deviation (n=3). Data were analyzed using one-way analysis of variance followed by Bonferroni post hoc test. **P<0.01, ***P<0.001. NCLX, mitochondrial sodium/calcium exchanger protein; DHA, dihydroartemisinin; CaMKK2, calcium/calmodulin-dependent protein kinase kinase 2; siRNA, small interfering RNA; OE, overexpression; ns, not significant; NC, negative control; ATP1A1, sodium/potassium-transporting ATPase subunit α-1; ATP5H, ATP synthase subunit d, mitochondrial.