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Related Experiment Video

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Biochemical Assays for Analyzing Activities of ATP-dependent Chromatin Remodeling Enzymes
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Role for Chromatin Remodeling Factor Chd1 in Learning and Memory.

Ines Schoberleitner1, Anna Mutti2, Anupam Sah3

  • 1Division of Molecular Biology, Biocenter, Medical University of Innsbruck, Innsbruck, Austria.

Frontiers in Molecular Neuroscience
|February 8, 2019
PubMed
Summary

Chromatin assembly factor Chd1 is crucial for memory formation in mice. Its mutation impairs long-term memory and alters immediate early gene expression in the hippocampus.

Keywords:
chromatincognitionepigeneticsgene expressionhippocampusimmediate early geneslearningmemory

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Area of Science:

  • Neuroscience
  • Epigenetics
  • Molecular Biology

Background:

  • Precise gene regulation in the brain is vital for learning and memory.
  • Epigenetic mechanisms, including histone modifications and DNA methylation, are key regulators.
  • ATP-dependent chromatin remodeling factors (ChRFs) role in memory-related gene regulation is largely unknown.

Purpose of the Study:

  • To investigate the role of the chromatin assembly and remodeling factor Chd1 in memory formation.
  • To examine Chd1's regulation of immediate early genes (IEGs) in the hippocampus.
  • To determine if Chd1 directly influences the expression of memory-associated genes.

Main Methods:

  • Behavioral testing of mice with a mutated Chd1 gene using object recognition and spatial memory paradigms.
  • Analysis of hippocampal gene expression, specifically IEGs like Egr1, Arc, cFos, and Bdnf.
  • Chromatin immunoprecipitation (ChIP) assays to assess Chd1 binding to the Egr1 locus.

Main Results:

  • Chd1 mutation negatively impacts long-term object recognition and spatial memory.
  • Chd1 regulates hippocampal expression of Egr1 and Arc, but not cFos or Bdnf.
  • Chd1 directly binds to the Egr1 genomic locus, suggesting a direct regulatory role.

Conclusions:

  • Chd1 is a critical regulator of molecular mechanisms underlying memory processes.
  • The N-terminal serine-rich region of Chd1 is important for its role in memory.
  • Chd1's regulation of IEGs like Egr1 is essential for hippocampal function in memory formation.