Detection and discrimination of maintenance and de novo CpG methylation events using MethylBreak
| Autor: | Jui-Ming Yeh, Augustus T. Mercado, George Hsiao, William Hsu, Chung Yung Chen |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
DNA (Cytosine-5-)-Methyltransferase 1 Methyltransferase Biomedical Engineering Biophysics Biosensing Techniques Biology Cell Line 03 medical and health sciences chemistry.chemical_compound Molecular beacon Cell Line Tumor Electrochemistry Humans DNA (Cytosine-5-)-Methyltransferases Genetics Oligonucleotide RNA General Medicine Methylation DNA DNA Methylation Molecular biology Recombinant Proteins 030104 developmental biology CpG site chemistry DNA methylation Nucleic Acid Conformation CpG Islands Biotechnology |
| Zdroj: | Biosensorsbioelectronics. 91 |
| ISSN: | 1873-4235 |
| Popis: | Understanding the principles governing the establishment and maintenance activities of DNA methyltransferases (DNMTs) can help in the development of predictive biomarkers associated with genetic disorders and diseases. A detection system was developed that distinguishes and quantifies methylation events using methylation-sensitive endonucleases and molecular beacon technology. MethylBreak (MB) is a 22-mer oligonucleotide with one hemimethylated and two unmethylated CpG sites, which are also recognition sites for Sau96I and SacII, and is attached to a fluorophore and a quencher. Maintenance methylation was quantified by fluorescence emission due to the digestion of SacII when the hemimethylated CpG site is methylated, which inhibits Sau96I cleavage. The signal difference between SacII digestion of both MB substrate and maintenance methylated MB corresponds to de novo methylation event. Our technology successfully discriminated and measured both methylation activities at different concentrations of MB and achieved a high correlation coefficient of R2=0.997. Additionally, MB was effectively applied to normal and cancer cell lines and in the analysis of enzymatic kinetics and RNA inhibition of recombinant human DNMT1. |
| Databáze: | OpenAIRE |
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