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Aging Epigenetics: Accumulation of Errors or Realization of a Specific Program?
V V Ashapkin1, L I Kutueva, B F Vanyushin
1Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, 119991, Russia. ashapkin@genebee.msu.ru.
Biochemistry. Biokhimiia
|November 30, 2015
Summary
Aging causes DNA hypomethylation, especially in repetitive DNA sequences. Specific DNA methylation patterns correlate with age, offering potential biomarkers for biological age prediction.
Area of Science:
- Epigenetics
- Genomics
- Mammalian Aging
Background:
- Aging is characterized by progressive DNA hypomethylation in mammals.
- This DNA methylation loss is tissue-specific and affects repetitive elements and intergenic regions.
- Reduced DNA methyltransferase activity may contribute to age-dependent hypomethylation.
Purpose of the Study:
- To investigate age-related changes in DNA methylation patterns.
- To explore the potential of DNA methylation as a biomarker for biological age.
- To understand the genome-wide distribution of age-dependent methylation changes.
Main Methods:
- Analysis of DNA methylation levels across the genome in aging mammals.
- Correlation of methylation status with age at specific genomic loci.
- Assessment of epigenetic cell reprogramming effects on DNA methylation.
Main Results:
- Global DNA hypomethylation occurs during aging, particularly in repetitive sequences and intergenic regions.
- Age-dependent hypermethylation is observed in genes with promoter CG islands.
- Hypomethylation predominantly affects CG-poor genes.
- Specific CpG sites show strong age correlation, serving as potential biomarkers.
- Epigenetic reprogramming resets epigenetic age.
Conclusions:
- DNA methylation patterns change significantly with age in mammals.
- Specific methylation sites can predict biological age.
- Epigenetic reprogramming can reverse age-related methylation changes.
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