Figure 5.
Overexpression of AnxA8 amplifies canonical Wnt signaling. (A) Western blotting reveals an increase in active β-catenin and GSK-3β protein in AnxA8-GFP transfected cells compared to controls, while β-catenin is unchanged (B) Quantification of blots such as those in A are presented as mean and standard deviation. Significant changes are marked with asterisks. *p ≤ 0.05. (C) AnxA8 overexpression in ARPE19 cells yielded increased levels of AnxA8 and slightly higher levels of GSK-3β mRNA. Addition of TGF-β1 led to increased β-catenin expression levels in AnxA8-overexpressing cells. Values are mean and standard deviation from 4 independent experiments determined by PCR. Asterisks indicate statistical significance. **p ≤ 0.01. (D) Transcripts of canonical Wnt target genes Axin1, c-myc and Lef1 were not significantly altered upon overexpression of AnxA8. Illustrated are mean and standard deviation of 4 separate data sets.