Cited by 117Memory and Neural MechanismsHistone Deacetylase Inhibitors ResearchPosttraumatic Stress Disorder Research

HDAC inhibitors as cognitive enhancers in fear, anxiety and trauma therapy: Where do we stand?

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Whittle, Nigel, Singewald, Nicolas·2014·Biochemical Society Transactions

Abstract

A novel strategy to treat anxiety and fear-related disorders such as phobias, panic and PTSD (post-traumatic stress disorder) is combining CBT (cognitive behavioural therapy), including extinction-based exposure therapy, with cognitive enhancers. By targeting and boosting mechanisms underlying learning, drug development in this field aims at designing CBT-augmenting compounds that help to overcome extinction learning deficits, promote long-term fear inhibition and thus support relapse prevention. Progress in revealing the role of epigenetic regulation of specific genes associated with extinction memory generation has opened new avenues in this direction. The present review examines recent evidence from pre-clinical studies showing that increasing histone acetylation, either via genetic or pharmacological inhibition of HDACs (histone deacetylases) by e.g. vorinostat/SAHA (suberoylanilide hydroxamic acid), entinostat/MS-275, sodium butyrate, TSA (trichostatin A) or VPA (valproic acid), or by targeting HATs (histone acetyltransferases), augments fear extinction and, importantly, generates a long-term extinction memory that can protect from return of fear phenomena. The molecular mechanisms and pathways involved including BDNF (brain-derived neurotrophic factor) and NMDA (N-methyl-D-aspartate) receptor signalling are just beginning to be revealed. First studies in healthy humans are in support of extinction-facilitating effects of HDAC inhibitors. Very recent evidence that HDAC inhibitors can rescue deficits in extinction-memory-impaired rodents indicates a potential clinical utility of this approach also for exposure therapy-resistant patients. Important future work includes investigation of the long-term safety aspects of HDAC inhibitor treatment, as well as design of isotype(s)-specific inhibitors. Taken together, HDAC inhibitors display promising potential as pharmacological adjuncts to augment the efficacy of exposure-based approaches in anxiety and trauma therapy.

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  • Drugs modulating epigenetic mechanisms may lead to the development of novel treatment options such as HDAC or DNMT inhibitors, based mostly on preclinical models.

    “Studies mostly in preclinical models suggest drugs modulating epigenetic mechanisms that may lead to the development of novel, innovative treatment options such as HDAC or DNMT inhibitors (cf.Whittle & Singewald, 2014).”

    From The applied implications of epigenetics in anxiety, affective and stress-related disorders - A review and synthesis on psychosocial stress, psychotherapy and prevention (2020) · cites this paper as Whittle & Singewald, 2014

    The Introduction (page unavailable) says the review examines mainly preclinical rodent studies and small clinical studies of drugs that increase histone acetylation as potential aids to anxiety treatment. The Future development section discusses developing targeted HDAC inhibitors. The cited paper does not support the DNMT-inhibitor example (searched: DNMT and DNA methyltransferase inhibitors). (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • Histone-deacetylase inhibitors may be useful in anxiety disorders by promoting relevant gene expression and targeting some common comorbidities of anxiety disorders.

    “histone-deacetylase inhibitors may be useful in anxiety disorders, by promoting relevant gene expression (Sah et al., 2019;Tran, Schulkin, Ligon, & Greenwood-Van Meerveld, 2015;Whittle & Singewald, 2014) and targeting also some common comorbidities of anxiety disorders (Moloney, Stilling, Dinan, & Cryan, 2015).”
  • HDACs have been implicated in a range of neuropsychiatric disorders, including depression and schizophrenia, and HDAC inhibitors could be potential cognitive enhancers in anxiety- and fear-related disorders.

    “HDACs have been implicated in a range of neuropsychiatric disorders [e.g., depression and schizophrenia (358)] and HDAC inhibitors could be potential cognitive enhancers in anxiety-and fear-related disorders (359).”

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Authors
Whittle, N., & Singewald, N.
Affiliations
Universität Innsbruck (AT)
Corresponding author
  • Whittle, Nigel
  • Singewald, Nicolas
Venue
Biochemical Society Transactions
Published
2014-03-20
Volume
42
Issue
2
Pages
569-581
ISSN
  • 0300-5127 (ISSN-L)
  • 1470-8752
OpenAlex
W2046101640
Cited by
117
References
106
Citations by year
2026: 1 · 2025: 10 · 2024: 6 · 2023: 10 · 2022: 10 · 2021: 9 · 2020: 12 · 2019: 10 · 2018: 12 · 2017: 8 · 2016: 11 · 2015: 12 · 2014: 6
FWCI
1.22
Type
journal article
Language
en
Open access
Locations
  • Biochemical Society Transactions (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
Austrian Science Fund (F4410, P 25375, SFB F4410)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Histone Deacetylase Inhibitors Research
  • Social Sciences › Psychology › Clinical Psychology › Posttraumatic Stress Disorder Research
Keywords
histone deacetylase inhibitors, nootropic drugs, fear extinction, post-traumatic stress disorder, anxiety disorders, phobia, panic disorder, exposure therapy, cognitive behavioral therapy, epigenetic regulation, histone acetylation, histone acetyltransferase, memory extinction, brain-derived neurotrophic factor, NMDA receptor signalling, vorinostat, entinostat, trichostatin A, valproic acid, sodium butyrate, relapse prevention, drug augmentation
MeSH terms
Anxiety, Fear, Humans, Wounds and Injuries, Nootropic Agents, Histone Deacetylase Inhibitors

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