(A) The BGC-823 cells were treated with 5-azacytidine, and the expression level of KCNK15-AS1 increased in a dose-dependent manner, and the expression of HDAC1 and DNMT1 decreased in a dose-dependent manner (⎂△∇P<0.05; ▁⋆△P<0.05; △⎂
⋆P<0.05; ▁△⋆P<0.05). (B) The SCG7901 cells was treated with 5-azacytidine. The expression level of KCNK15-AS1 increased in a dose-dependent manner, and the expression of HDAC1 and DNMT1 decreased in a dose-dependent manner (⎂▁∇P<0.05; ⋆♦△P<0.05; △∇⎂P<0.05; ▁
△
⋆P<0.05). (C) The BGC-823 cells were treated with chidamide. The expression level of KCNK15-AS1 increased in a dose-dependent manner, and the expression of HDAC1 and DNMT1 decreased in a dose-dependent manner (♦△∇△P<0.05; ⢶⎂∇△P<0.05; △
⢶▁△P<0.05; ⢶⋆♦△P<0.05). (D) The SCG7901 cells were treated with chidamide. The expression level of KCNK15-AS1 increased in a dose-dependent manner, and the expression of HDAC1 and DNMT1 decreased in a dose-dependent manner (△∇⋆P<0.05; ▁⋆△P<0.05; ∇▁△P<0.05; ▁△⋆P<0.05). (E) Western blot showed the expression levels of HDAC1 and DNMT1 in BGC-823 cells treated with chidamide and 5-azacytidine. (F) Western blot showed the expression levels of HDAC1 and DNMT1 in SCG7901 cells treated with chidamide and 5-azacytidine. (G) After treatment with chidamide and 5-azacytidine, KCNK15-AS1 was unmethylated in both the BGC-823 and SCG7901 cells. (H) The expression of KCNK15-AS1 was decreased after the knockdown of HDAC1 (⎂P<0.05).