Sixteen CpGs of the MGMT promoter were checked for complete methylation (mean methylation rate >95%) or complete nonmethylation (mean methylation rate 0.3%). The PCR products for MGMT (6-O methylguanine-DNA methyltransferase), which is a p53-related gene involved in DNA repair and drug resistance, were subjected to Pyrosequencing, which was performed on a PyroMark Q96ID instrument. (Data kindly provided by Uwe Gerstenmaier, Varionostic GmbH, Ulm).
A CpG island from the promoter region of the APC gene (adenomatosis polyposis coli) was amplified, and the degree of methylation was determined by HRM methylation analysis on the Rotor-Gene Q, using the EpiTect HRM PCR Kit. Methylated and unmethylated DNA from the EpiTect Control DNA Set was mixed in varying ratios, and used as the templates for the analysis.
Methylation of the MP6 locus was measured in unmethylated DNA (UMDNA 1), methylated DNA (VIAL A 1), and a mixture of both (HTXA 1), before and after amplification (WBAUMDNA1, WBAHTXA 1, WBAVIAL A 1) using the EpiTect Whole Bisulfitome Kit. The methylation pattern prior to amplification is very similar to that of the amplified DNA, demonstrating representative amplification. (Data kindly provided by Hany Ezzeldin, Mayo Clinic, Rochester, USA).
EpiTect Control DNA can be successfully used for the validation of primers for methylation-specific PCR (MSP) applications.
EpiTect Methylated Control DNA and EpiTect Unmethylated Control DNA (both pre-bisulfite converted) were mixed to give 100%, 90%, 50%, 10%, and 0% methylated DNA. EpiTect MethyLight Assays for the human PITX2 gene were run in triplicate, using 10 ng of each DNA sample. The results show that EpiTect Control DNA can be used as a methylation standard for the quantification of unknown DNA samples.