CDKN2A and cancer: Interestingly, a positive relationship between the expression levels of ANRIL and AUF1 mRNA was also observed using the transcript databases for 1037 cell lines in the cancer cell line encyclopedia (CCLE) project [R = 0.23 (or 0.30 for 224 cell lines with relative CDKN2A copy number > 0), P < 0.001; Additional file 9: Figure S5].