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Genotoxic and epigenetic mechanisms in arsenic carcinogenicity

Elisa Bustaffa1, Andrea Stoccoro, Fabrizio Bianchi

  • 1Unit of Environmental Epidemiology and Diseases Registries, Institute of Clinical Physiology, National Council of Research, Via Moruzzi 1, 56123, Pisa, Italy.

Archives of Toxicology
|April 3, 2014
PubMed

Insights

Arsenic in drinking water causes cancer through genetic mutations and epigenetic alterations. Understanding these mechanisms is key for early diagnosis and prevention in exposed populations.

Area of Science:

  • Environmental toxicology
  • Molecular carcinogenesis
  • Epigenetics

Background:

  • Arsenic is a known human carcinogen linked to various cancers, particularly from contaminated drinking water.
  • Mechanisms of arsenic-induced carcinogenesis are not fully understood but involve genotoxicity and chromosomal abnormalities.
  • Emerging evidence highlights the role of epigenetic modifications in arsenic's adverse health effects.

Purpose of the Study:

  • To clarify the mechanisms of arsenic-induced carcinogenesis initiation and promotion.
  • To identify pathways for early diagnosis and prevention in arsenic-exposed populations.
  • To emphasize the importance of studying genetic and epigenetic alterations in exposed individuals.

Main Methods:

  • Review of existing epidemiological and experimental studies on arsenic toxicity.
  • Analysis of proposed mechanisms including genotoxicity, chromosomal abnormalities, and epigenetic modifications.
  • Focus on DNA methylation, histone modifications, and microRNA activity.

Main Results:

  • Arsenic exposure via drinking water is associated with increased cancer risk globally.
  • Arsenic's carcinogenic potential may stem from its dual ability to induce mutations and epimutations.
  • Epigenetic changes, including DNA methylation, histone modifications, and microRNA dysregulation, are implicated in arsenic toxicity.

Conclusions:

  • Arsenic-induced carcinogenesis is a complex process potentially driven by both genetic and epigenetic alterations.
  • Early diagnosis and prevention strategies are crucial for protecting populations exposed to arsenic.
  • Further research should comprehensively investigate genetic/epigenetic alterations in arsenic-exposed individuals.

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