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Epigenetic Regulation01:46

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Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
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Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
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Updated: Feb 15, 2026

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Epigenetic changes and their implications in autoimmune hepatitis.

Albert J Czaja1

  • 1Division of Gastroenterology and Hepatology, Mayo Clinic College of Medicine and Science, Rochester, MN, USA.

European Journal of Clinical Investigation
|February 1, 2018
PubMed
Summary

Epigenetic changes, influenced by environment and inheritance, may drive autoimmune hepatitis. These changes are potentially reversible, offering new therapeutic avenues for this complex liver disease.

Keywords:
autoimmune hepatitisepigeneticsgene functioninterventionspathogenesis

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Area of Science:

  • Immunology
  • Genetics
  • Hepatology

Background:

  • Genetic factors alone do not fully explain autoimmune hepatitis risk.
  • Epigenetic modifications are implicated in disease disparities across populations.
  • Environmental factors and inherited traits may influence autoimmune hepatitis development.

Purpose of the Study:

  • To review the role of epigenetic changes in autoimmune hepatitis.
  • To explore how environmental factors and inheritance impact autoimmune hepatitis.
  • To assess the potential for therapeutic interventions targeting epigenetic modifications.

Main Methods:

  • Systematic literature search of PubMed abstracts (1689 reviewed).
  • In-depth review of over 150 full-length articles.
  • Analysis of epigenetic mechanisms in autoimmune diseases.

Main Results:

  • DNA hypomethylation and histone modification activate pro-inflammatory genes in autoimmune diseases.
  • Organ-specific microribonucleic acids (miRNAs) regulate gene expression, influencing inflammation and immune suppression.
  • Elevated circulating miRNAs (21 and 122) in autoimmune hepatitis may enhance pro-inflammatory cytokine production.
  • Environmental factors (drugs, pollutants, diet) and aging can induce heritable epigenetic changes promoting autoimmunity.
  • Reversal of epigenetic changes is possible through various interventions, including enzyme manipulation and nutritional correction.

Conclusions:

  • Potentially reversible epigenetic alterations influence autoimmune hepatitis occurrence and progression.
  • Further research is needed to identify specific genomic targets and effective interventions.
  • Understanding epigenetic mechanisms is crucial for developing novel therapeutic strategies for autoimmune hepatitis.