Figure 6. β-catenin is required for effects of GSK3β inhibition against oxidative stress-induced mitochondrial damage. (A) Relative mRNA expression of ROS scavenging genes in retinae from eyes treated with si-GSK3β+si-β-catenin (HFD+si-GSK3β/R-si-β-catenin) or si-GSK3β+si-sc (HFD+si-GSK3β/L-si-sc), respectively. (B) Activities of antioxidant enzymes in retinae. (C) Amounts of retinal 4-HNE. (D) Activities of retinal mitochondrial complex MRCC I-IV. Two retinae from 2 respective eyes in one group were pooled. Three independent experiments were performed in duplicate for each group. (E) Representative images of retinal TEM with mitochondria in IPL indicated with arrows. Areas boxed in are shown at higher magnification in lower panels. Scale bar, 0.5 μm. Data are means ± SEM. n = 4 eyes (A–C; E) or n = 6 eyes (D) per group. *P < 0.05 and **P < 0.01 vs contralateral eye injected with scramble si-sc.