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Updated: Sep 13, 2025
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Purification of H3 and H4 Histone Proteins and the Quantification of Acetylated Histone Marks in Cells and Brain Tissue
Published on: November 30, 2018
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Formaldehyde Exposure Induces Systemic Epigenetic Alterations in Histone Methylation and Acetylation
Jiahao Feng1, Chih-Wei Liu1, Jingya Peng1
1Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina 27599, United States.
Chemical Research in Toxicology
|July 31, 2025
Summary
Formaldehyde exposure alters histone modifications, impacting gene regulation and potentially contributing to cancer and neurodegenerative diseases. This epigenetic toxicity offers new insights into formaldehyde
Area of Science:
- Environmental Health
- Epigenetics
- Toxicology
Background:
- Formaldehyde (FA) is a human carcinogen linked to various cancers.
- Genotoxic effects alone do not fully explain FA's carcinogenicity.
- Epigenetic mechanisms, particularly histone modifications, are implicated in FA pathogenesis.
Purpose of the Study:
- To investigate the epigenetic consequences of formaldehyde exposure on histone methylation and acetylation.
- To analyze changes in histone post-translational modifications (PTMs) in response to FA.
Main Methods:
- Human bronchial epithelial cells (BEAS-2B) were exposed to low and high doses of formaldehyde.
- Histone extracts were analyzed using liquid chromatography-tandem mass spectrometry-based proteomics.
- PTM-combined peptide analysis and single PTM site/type comparisons were performed.
Main Results:
- Formaldehyde exposure induced systemic alterations in histone H3 and H4 methylation and acetylation patterns.
- Specific modifications included hypomethylation of H3K4 and H3K79, and changes in multiple H3 and H4 lysine/arginine residues.
- These FA-induced histone modifications mirror those found in cancers and Alzheimer's disease.
Conclusions:
- Formaldehyde exposure causes significant epigenetic toxicity.
- Alterations in histone methylation and acetylation are key mechanisms in FA-driven pathogenesis.
- Findings provide novel insights into formaldehyde's role in disease development.
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