Figure 1

Representative figure of the methylation analysis. A: Methylation status of MMP-2 in ameloblastoma. M: PCR products when amplified by methylated primers (205 bp); U: PCR products when amplified by unmethylated primers (206 bp); +M: positive control for methylated reaction; +U: positive control for unmethylated reaction. -M and -U: negative controls without DNA. Lines 1 to 3 represent DNA from ameloblastoma samples. B: Methylation status of MMP-9 in ameloblastoma. DNA samples were digested by the AciI restriction enzyme followed by PCR, flanking the restriction sites. Absent band indicates unmethylated profile (U) due to DNA cleavage by the restriction enzyme. Presence of the PCR band represents methylated profile (M) of the MMP-9 gene. +M: methylated positive control; +U: unmethylated positive control; - : negative control without DNA.