Based on our mouse colon tissue studies and the ENCODE project findings, we generated a CTNNB1 reporter gene construct containing 555 bp of human CTNNB1 upstream and exon 1 sequences and found that shRNA-mediated inhibition of CTNNB1 endogenous gene expression in the APC-mutant DLD1 human colon cancer cell line led to inhibition of the activity of the CTNNB1 reporter gene. Here, APC is linked to colonic neoplasm.