H226 human NSCLC cells (8 × 104 cells) were treated with 5-Aza at 0.1, 1, and 10 ng/mL. The methylation status of the RASSF1a promoter was detected using the EZ DNA Methylation-Direct Kit and methylation-specific PCR. Bands 1 to 3 are samples of water, methylated DNA control, and unmethylated DNA control; bands 4 to 7 are samples of H226 cells treated with 5-Aza at 0, 0.1, 1, and 10 ng/mL, respectively.
Abbreviations: 5-Aza = 5-azacytidine; M = methylated detection; NSCLC = non–small-cell lung cancer; U = unmethylated detection