Figure 1.
EN2 gene promoter methylation status determined in primary kidney tissues and cell lines. (A) EN2 gene promoter methylation in primary cc-RCC tissues and corresponding non-malignant kidney tissues as indicated by MSP analysis. (B) EN2 gene promoter methylation in cc-RCC cell lines: 786-O, ACHN, A498 and normal human proximal tubule epithelial cell line HK-2 as indicated by MSP analysis. cc-RCC, clear cell renal cell carcinoma; EN2, engrailed-2; MSP, methylation-specific polymerase chain reaction; M, presence of methylated DNA; U, presence of unmethylated DNA; T, primary cc-RCC tissue, T1, tissue sample 1, T2, tissue sample 2; N, non-malignant kidney tissue; X, methylated positive control; Y, unmethylated positive control; Z, negative control.