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Organochlorine Pesticides and Epigenetic Alterations in Brain Cancer

Fatemeh Yousefi1,2,3,4, Gholamreza Asadikaram5,6,7,8, Saeid Karamouzian9,4

  • 1Applied Cellular and Molecular Research Center, Kerman University of Medical Sciences, Kerman, Iran.

Cellular and Molecular Neurobiology
|February 9, 2025
PubMed

Insights

Organochlorine pesticides (OCPs) are linked to epigenetic changes in brain tumors. OCPs exposure correlates with gene hypermethylation and altered histone marks in primary brain tumor patients.

Area of Science:

  • Neuro-oncology
  • Environmental Epigenetics
  • Toxicology

Background:

  • Epigenetic alterations are crucial in brain cancer development, especially gliomas.
  • Organochlorine pesticides (OCPs) are environmental toxins with potential carcinogenic effects.
  • Understanding the link between OCPs and brain tumor epigenetics is vital for public health.

Purpose of the Study:

  • To investigate the impact of OCPs on epigenetic modifications in primary brain tumors (PBT).
  • To assess the correlation between serum OCP levels and the methylation status of tumor suppressor genes (P16, RRP22) and histone marks in PBT patients.

Main Methods:

  • Analyzed tumor suppressor gene methylation (P16, RRP22) using methylation-specific PCR (MSP).
  • Assessed histone modifications (H4K16ac, H3K9ac, H4K20me3, H3k4me2) via western blotting.
  • Correlated serum OCP concentrations with epigenetic changes in 73 PBT patients and 15 controls.

Main Results:

  • PBT patients showed significant hypermethylation of P16 and RRP22 promoter regions.
  • Reduced levels of H3K9ac, H4K20me3, and H3K4me2 were observed in PBT patients compared to controls.
  • Direct correlations found between serum OCPs and P16/RRP22 hypermethylation, and specific histone modifications.

Conclusions:

  • Epigenetic modifications are significant in brain tumor pathogenesis.
  • OCPs are identified as key contributors to these epigenetic changes in PBT.
  • OCPs exposure is directly associated with gene hypermethylation and altered histone profiles in brain tumors.
Keywords:
EpigeneticHistone modificationOrganochlorine pesticidesPrimary brain cancerPromoter methylation

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