We also examined the expression levels of some important tumor suppressors including LATS1, LATS2, KLF2, and PTEN; cyclin-dependent kinase inhibitors including P21, CDKN2B (P15), and CDKN2A (P16); and cell migration and invasion regulators, including TIMP3 and E-cadherin, in the BGC823 and AGS cells after the knockdown of AGAP2-AS1. The gene discussed is CDKN2A; the disease is neoplasm.