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Summary

Heavy alcohol consumption impairs one-carbon metabolism, causing epigenetic changes like altered DNA methylation and histone modifications that increase cancer risk. Targeting these alcohol-induced epigenetic changes offers potential for cancer diagnosis, prognosis, and precision medicine.

Keywords:
DNA methylationEthanol metabolismGenetic variantsHeavy alcohol consumptionHistone modificationsOne-carbon metabolismmiRNAs

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Cancer Research

Background:

  • Chronic, heavy alcohol consumption is linked to increased cancer risk.
  • Alcohol toxicity disrupts one-carbon metabolism, a critical pathway for cellular processes.
  • This disruption leads to epigenetic alterations that promote cancer development.

Purpose of the Study:

  • To elucidate the mechanisms by which alcohol consumption induces epigenetic changes relevant to cancer.
  • To identify potential epigenetic biomarkers for alcohol-related cancers.
  • To explore therapeutic strategies targeting alcohol-induced epigenetic modifications.

Main Methods:

  • Analysis of one-carbon metabolism pathways affected by alcohol.
  • Investigation of epigenetic modifications including DNA methylation and histone modifications.
  • Assessment of molecular changes such as homocysteine, S-adenosylmethionine, and glutathione levels.
  • Evaluation of reactive oxygen species (ROS) and microRNA alterations.
  • Examination of genetic variants influencing alcohol-induced epigenetic changes and cancer risk.

Main Results:

  • Alcohol consumption leads to folate deficiency and altered ethanol metabolism, causing imbalances in key metabolites (e.g., elevated homocysteine, reduced S-adenosylmethionine).
  • These metabolic shifts result in abnormal DNA methylation patterns (hypermethylation and global hypomethylation) and histone modifications.
  • Reactive oxygen species and altered microRNA expression further contribute to carcinogenesis.
  • Epigenetic changes in esophageal, hepatic, and colorectal cancers are detectable and may serve as biomarkers.
  • Genetic variations can modulate the link between alcohol-induced epigenetic changes and cancer susceptibility.

Conclusions:

  • Alcohol-induced epigenetic alterations in one-carbon metabolism are significant drivers of cancer development.
  • Epigenetic biomarkers hold promise for the clinical diagnosis and prognosis of alcohol-related cancers.
  • Targeting these alcohol-induced epigenetic changes represents a potential avenue for precision medicine in cancer treatment.