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Updated: May 23, 2026
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Contextual and Cued Fear Conditioning Test Using a Video Analyzing System in Mice
Published on: March 1, 2014
HDAC1 regulates fear extinction in mice
Sanaz Bahari-Javan1, Andrea Maddalena, Cemil Kerimoglu
1Department of Psychiatry and Psychotherapy, University Medical Center Göttingen, 37075 Göttingen, Germany.
Summary
Hippocampal histone deacetylase 1 (HDAC1) is crucial for memory extinction. Overexpression impairs fear memory extinction, while its absence affects this learning process via epigenetic modifications.
Area of Science:
- Neuroscience
- Molecular Biology
- Epigenetics
Background:
- Histone acetylation is linked to neuropsychiatric disorders.
- Histone deacetylase inhibitors (HDACis) show neuroprotective effects.
- The specific roles of individual HDACs in brain diseases are largely unknown.
Purpose of the Study:
- To investigate the role of histone deacetylase 1 (HDAC1) in the pathogenesis of brain diseases.
- To determine the specific function of hippocampal HDAC1 in cognitive processes.
Main Methods:
- Virus-mediated overexpression of neuronal HDAC1 in adult mouse hippocampus.
- Assessment of contextual fear memory extinction and other cognitive abilities.
- Analysis of epigenetic mechanisms involving H3K9 deacetylation and target gene trimethylation.
Main Results:
- Overexpression of neuronal HDAC1 specifically impaired contextual fear memory extinction in mice.
- Other cognitive functions remained unaffected by HDAC1 manipulation.
- Hippocampal HDAC1 is essential for extinction learning under physiological conditions.
Conclusions:
- Hippocampal HDAC1 plays a specific role in memory function, particularly in memory extinction.
- HDAC1 regulates extinction learning through epigenetic modifications, including H3K9 deacetylation.
- These findings highlight HDAC1 as a potential target for understanding and treating memory-related disorders.
