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Updated: Jul 19, 2026
13:11
Optimized Analysis of DNA Methylation and Gene Expression from Small, Anatomically-defined Areas of the Brain
Published on: July 12, 2012
Valproate induces widespread epigenetic reprogramming which involves demethylation of specific genes
Snezana Milutinovic1, Ana C D'Alessio, Nancy Detich
1Department of Pharmacology and Therapeutics, McGill University, Montreal, Canada.
Carcinogenesis
|October 3, 2006
Summary
Valproate (VPA), an epilepsy drug, alters gene expression by changing DNA methylation and histone acetylation. This HDAC inhibitor impacts the epigenome, suggesting new cancer therapy potential.
Area of Science:
- Epigenetics
- Molecular Biology
- Pharmacology
Background:
- Valproate (VPA) is a established treatment for epilepsy, mood stabilization, and migraines.
- VPA is recognized as a histone deacetylase (HDAC) inhibitor.
- Previous studies indicated VPA can induce active DNA demethylation in transfected DNA.
Purpose of the Study:
- To investigate if VPA induces stable epigenetic changes via DNA methylation alterations in genomic DNA.
- To identify genes whose expression is modulated by VPA treatment.
- To explore the interplay between VPA, DNA methylation, and gene expression.
Main Methods:
- Gene expression analysis using microarrays to identify VPA-induced genes in HEK 293 cells.
- Comparison of VPA-induced gene expression with 5-aza-2'-deoxy-cytidine (5-aza-CdR), a DNA methylation inhibitor.
- Methylation status mapping of MAGEB2, MMP2, and WIF1 genes.
- Chromatin immunoprecipitation (ChIP) assay to assess VPA's effect on histone acetylation.
Main Results:
- VPA treatment induced the expression of specific genes in HEK 293 cells.
- A subset of VPA-induced genes were also responsive to 5-aza-CdR, indicating VPA affects methylation-silenced genes.
- VPA treatment altered DNA methylation states of MAGEB2, MMP2, and WIF1 genes.
- ChIP assays confirmed VPA treatment modified histone acetylation of these genes.
Conclusions:
- VPA induces stable epigenetic modifications, including changes in DNA methylation and histone acetylation.
- HDAC inhibitors like VPA have broader effects beyond histone acetylation, impacting DNA modification.
- Findings suggest potential therapeutic applications for VPA in cancer treatment due to its epigenetic regulatory effects.
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