Association of tissue-specific differentially methylated regions (TDMs) with differential gene expression
| Autor: | Fei Song, Joseph F. Smith, Makoto T. Kimura, Tomoki Matsuyama, Hiroki Nagase, Arlene D. Morrow, William A. Held |
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| Rok vydání: | 2005 |
| Předmět: |
Male
Genetics Mice Inbred BALB C Genome Multidisciplinary Reverse Transcriptase Polymerase Chain Reaction Restriction landmark genomic scanning Gene Expression Methylation Biological Sciences DNA Methylation Biology Molecular biology Bisulfite Mice Differentially methylated regions CpG site DNA methylation Gene expression Animals CpG Islands Promoter Regions Genetic Gene |
| Zdroj: | Proceedings of the National Academy of Sciences. 102:3336-3341 |
| ISSN: | 1091-6490 0027-8424 |
| Popis: | Early studies proposed that DNA methylation could have a role in regulating gene expression during development [Riggs, A.D. (1975) Cytogenet. Cell Genet. 14, 9–25]. However, some studies of DNA methylation in known tissue-specific genes during development do not support a major role for DNA methylation. In the results presented here, tissue-specific differentially methylated regions (TDMs) were first identified, and then expression of genes associated with these regions correlated with methylation status. Restriction landmark genomic scanning (RLGS) was used in conjunction with virtual RLGS to identify 150 TDMs [Matsuyama, T., Kimura, M.T., Koike, K., Abe, T., Nakao, T., Asami, T., Ebisuzaki, T., Held, W.A., Yoshida, S. & Nagase, H. (2003) Nucleic Acids Res. 31, 4490–4496]. Analysis of 14 TDMs by methylation-specific PCR and by bisulfite genomic sequencing confirms that the regions identified by RLGS are differentially methylated in a tissue-specific manner. The results indicate that 5% or more of the CpG islands are TDMs, disputing the general notion that all CpG islands are unmethylated. Some of the TDMs are within 5′ promoter CpG islands of genes, which exhibit a tissue-specific expression pattern that is consistent with methylation status and a role in tissue differentiation. |
| Databáze: | OpenAIRE |
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