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Related Experiment Videos

Histone deacetylase inhibitors decrease reelin promoter methylation in vitro.

Colin P Mitchell1, Ying Chen, Marija Kundakovic

  • 1The Psychiatric Institute, Department of Psychiatry, University of Illinois at Chicago, Illinois 60612, USA.

Journal of Neurochemistry
|April 9, 2005
PubMed
Summary
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Histone deacetylase inhibitors (trichostatin A and valproic acid) and a methylation inhibitor (aza-2'-deoxycytidine) reduced reelin promoter methylation in neural progenitor cells. TSA and VPA increased histone acetylation, while AZA did not.

Area of Science:

  • Neuroscience
  • Epigenetics
  • Molecular Biology

Background:

  • Reelin is crucial for neuronal development and migration.
  • Aberrant reelin expression is linked to neurological disorders.
  • Epigenetic modifications, including DNA methylation and histone acetylation, regulate gene expression.

Purpose of the Study:

  • To investigate the impact of epigenetic modifiers on the methylation status of the human reelin promoter.
  • To examine the effects of trichostatin A (TSA), valproic acid (VPA), and aza-2 -deoxycytidine (AZA) on reelin promoter methylation and histone acetylation in neural progenitor cells (NT2).

Main Methods:

  • Treatment of NT2 cells with TSA, VPA, and AZA for varying durations.
  • Analysis of reelin promoter methylation status.

Related Experiment Videos

  • Assessment of histone H3 and H4 acetylation levels using Western blotting and chromatin immunoprecipitation (ChIP).

    • Main Results:

    • All three agents (TSA, VPA, AZA) reduced reelin promoter methylation.
    • TSA and VPA increased histone H3 and H4 acetylation, correlating with reelin promoter changes.
    • AZA decreased promoter methylation without increasing histone acetylation; prolonged AZA treatment decreased histone acetylation.
    • A trend towards reduced methylated H3 was observed with TSA and VPA treatment.

    Conclusions:

    • TSA and VPA reduce reelin promoter methylation primarily by increasing histone acetylation.
    • AZA reduces reelin promoter methylation through a mechanism independent of histone acetylation.
    • These findings elucidate distinct epigenetic pathways regulating reelin gene expression in neural progenitor cells.