Methylation-specific polymerase chain reaction detection of PTEN methylation in different cell lines. (a) Detection in different cell lines (1–4, CCRF-CEM, Molt-4, SUP-B15, and Jurkat cells; 5, the control without DNA template); (b) detection in Jurkat cells at different drug concentrations of 5-Aza-dC for 24 h (1–6, 0 μmol/L, 1 μmol/L, 2 μmol/L, 5 μmol/L, 10 μmol/L and 15 μmol/L); (c) detection in Jurkat cells treated by 10 μmol/L of 5-Aza-dC at different time points of 0 h, 12 h, 24 h, 48 h, and 72 h (1–5, 0 h, 12 h, 24 h, 48 h, and 72 h). (n = 3). (U: un-methylated, M: methylated. CCREF-CM, SUP-B15, Molt: Cell line naming codes for T-cell acute lymphoblastic leukemia. bp and ng: Electrophoretic fragment length and DNA load quantity, respectively, with their values presented in the figure along with corresponding units. PTEN: Phosphatase and tensin homolog deleted on chromosome ten; 5-Aza-dC: 5-Aza-2’-deoxycytidine).