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Modeling DNA Methylation Profiles through a Dynamic Equilibrium between Methylation and Demethylation.

Giulia De Riso1, Damiano Francesco Giuseppe Fiorillo2,3, Annalisa Fierro4

  • 1Dipartimento di Medicina Molecolare e Biotecnologie Mediche, Università degli Studi di Napoli "Federico II", Via S. Pansini 5, 80131 Naples, Italy.

Biomolecules
|September 9, 2020
PubMed
Summary
This summary is machine-generated.

DNA methylation patterns are consistent across individuals, suggesting a balanced process of methylation and demethylation. This epigenetic regulation involves dynamic DNA changes influencing gene expression.

Keywords:
DNA demethylationDNA methylationcell-to-cell heterogeneityepiallelesmathematical modelingmethylation profilesstatistical equilibrium

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Area of Science:

  • Epigenetics
  • Molecular Biology
  • Computational Biology

Background:

  • DNA methylation is a critical epigenetic mechanism regulating gene expression.
  • Mathematical modeling aids in understanding complex biological processes like DNA methylation.
  • Previous studies highlight the role of DNA methylation in various cellular functions.

Purpose of the Study:

  • To investigate DNA methylation dynamics at specific gene loci using high-depth analysis.
  • To develop and apply a mathematical model to understand the regulatory mechanisms of DNA methylation.
  • To explore cell-to-cell and individual variations in DNA methylation profiles.

Main Methods:

  • High-depth DNA methylation profiling of two specific genomic loci (D-Aspartate Oxidase and D-Serine Oxidase genes).
  • Analysis of DNA methylation patterns in 51 different biological samples.
  • Development and application of a mathematical model to interpret experimental data.

Main Results:

  • Observed cell-to-cell variations in DNA methylation, yet consistent profiles across individuals.
  • Experimental data supported a hypothesis of a dynamic balance between DNA methylation and demethylation.
  • The developed mathematical model accurately reflected the experimental findings.

Conclusions:

  • DNA methylation and demethylation act in concert to determine the methylation state of a genomic locus.
  • The balance between DNA methylation and demethylation appears to be conserved across individuals.
  • Neighboring cytosine methylation status significantly influences this dynamic epigenetic balance.