CDKN1A and colonic neoplasm: The present study aimed to evaluate the effect of 5-Aza-CdR on p21Cip1/Waf1/Sdi1, p27Kip1, p57Kip2, and DNA methyltransferase 1genes expression, cell growth inhibition and cell apoptosis induction in colon cancer SW 480 and SW 948 cell lines.