Immunohistochemistry was performed as described previously 20 (link). Briefly, deparaffinized sections were subject to antigen retrieval, followed by treatment with 10% H2O2/methanol for 10 minutes to quench the endogenous peroxidase activity. The sections were incubated with primary antibodies at 4°C overnight. The primary antibodies used in this research are as follows: β-Catenin (ab22656, abcam); Axin2 (ab109307, abcam).