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Updated: May 26, 2026
Genome-Wide Analysis of DNA Methylation in Gastrointestinal Cancer
Published on: September 18, 2020
Establishment of Methylation-Specific PCR for the Mouse p53 Gene
Ryuji Okazaki1, Akira Ootsuyama, Yasuhiro Yoshida
1Department of Radiation Biology and Health, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka Yahatanishi-ku, Kitakyushu 807-8555, Japan.
Abstract:
Methylation-specific PCR (MSP) of the mouse p53 gene has not yet been reported. We searched the CpG islands, sequenced the bisulfited DNA, and designed PCR primers for methylation and unmethylation sites. DNA from a young mouse produced a strong PCR product with the unmethylated primer and a weaker band with the methylated primer. DNA from an old mouse produced bands of similar intensities with both primers. In radiation-induced tumors, DNA from an old mouse yielded similar bands with both types of primers. We suggest that MSP is a valuable technique for the epigenetic study of the mouse p53 gene.
Insights
Methylation-specific PCR (MSP) successfully analyzed mouse p53 gene methylation. Aging and radiation exposure in mice showed altered p53 methylation patterns, indicating MSP
Area of Science:
- Epigenetics
- Molecular Biology
- Genomics
Background:
- The methylation status of the mouse p53 gene using methylation-specific PCR (MSP) has not been previously reported.
- Epigenetic modifications, such as DNA methylation, play crucial roles in gene regulation and disease development.
Purpose of the Study:
- To develop and apply methylation-specific PCR (MSP) for the epigenetic analysis of the mouse p53 gene.
- To investigate age-related and radiation-induced changes in p53 gene methylation in mice.
Main Methods:
- Searched CpG islands within the mouse p53 gene.
- Sequenced bisulfite-converted DNA to identify methylation sites.
- Designed methylation- and unmethylation-specific PCR primers.
- Performed MSP on DNA from young mice, old mice, and radiation-induced tumors.
Main Results:
- DNA from young mice showed predominantly unmethylated p53.
- DNA from old mice and radiation-induced tumors exhibited increased p53 methylation.
- MSP demonstrated differential methylation patterns associated with age and radiation exposure.
Conclusions:
- Methylation-specific PCR (MSP) is a valuable and effective technique for studying the epigenetics of the mouse p53 gene.
- Age and radiation exposure are associated with alterations in p53 gene methylation in mice.
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