Cited by 222Cannabis and Cannabinoid ResearchStress Responses and CortisolNeuroscience and Neuropharmacology Research

Disruption of fatty acid amide hydrolase activity prevents the effects of chronic stress on anxiety and amygdalar microstructure

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Hill, M N, Kumar, S A, Filipski, S B, Iverson, M, Stuhr, K L, Keith, J M, Cravatt, B F, Hillard, C J +2 more·2013·Molecular Psychiatry

Abstract

Hyperactivation of the amygdala following chronic stress is believed to be one of the primary mechanisms underlying the increased propensity for anxiety-like behaviors and pathological states; however, the mechanisms by which chronic stress modulates amygdalar function are not well characterized. The aim of the current study was to determine the extent to which the endocannabinoid (eCB) system, which is known to regulate emotional behavior and neuroplasticity, contributes to changes in amygdalar structure and function following chronic stress. To examine the hypothesis, we have exposed C57/Bl6 mice to chronic restraint stress, which results in an increase in fatty acid amide hydrolase (FAAH) activity and a reduction in the concentration of the eCB N-arachidonylethanolamine (AEA) within the amygdala. Chronic restraint stress also increased dendritic arborization, complexity and spine density of pyramidal neurons in the basolateral nucleus of the amygdala (BLA) and increased anxiety-like behavior in wild-type mice. All of the stress-induced changes in amygdalar structure and function were absent in mice deficient in FAAH. Further, the anti-anxiety effect of FAAH deletion was recapitulated in rats treated orally with a novel pharmacological inhibitor of FAAH, JNJ5003 (50 mg per kg per day), during exposure to chronic stress. These studies suggest that FAAH is required for chronic stress to induce hyperactivity and structural remodeling of the amygdala. Collectively, these studies indicate that FAAH-mediated decreases in AEA occur following chronic stress and that this loss of AEA signaling is functionally relevant to the effects of chronic stress. These data support the hypothesis that inhibition of FAAH has therapeutic potential in the treatment of anxiety disorders, possibly by maintaining normal amygdalar function in the face of chronic stress.

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Crossref · 10.1038/mp.2012.90

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  • Gene deletion or pharmacological inhibition of FAAH prevents stress-induced reductions in AEA and associated increases in BLA dendritic hypertrophy and anxiety-like behavior.

    “Gene deletion or pharmacological inhibition of FAAH prevents stress-induced reductions in AEA and associated increases in BLA dendritic hypertrophy and anxiety-like behavior.”
  • The chronic stress-induced morphological changes in BLA pyramidal neurons are absent in mutant mice lacking FAAH.

    “These morphological changes are absent in mutant mice lacking FAAH [68]”
  • Rodents exposed to chronic stress show sustained enhancement of FAAH activity and prolonged reductions in tissue levels of BLA AEA that persist beyond exposure.

    “Rodents exposed to chronic stress show sustained enhancement of FAAH activity and prolonged reductions in tissue levels of BLA AEA that persist beyond exposure [59,68,69].”
  • Genetic loss or repeated, pre-stress pharmacological inhibition of FAAH prevents stress-induced reductions in AEA and increases in HPA activity and anxiety-like behavior.

    “whereas genetic loss or repeated, pre-stress pharmacological inhibition (JNJ5003) of FAAH prevents stress-induced reductions in AEA and increases in HPA activity and anxiety-like behavior [68,73,74]”

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Authors
Hill, M. N., Kumar, S. A., Filipski, S. B., Iverson, M., Stuhr, K. L., Keith, J. M., Cravatt, B. F., Hillard, C. J., Chattarji, S., & McEwen, B. S.
Affiliations
  • University of Calgary (CA)
  • National Centre for Biological Sciences (IN)
  • Rockefeller University (US)
  • Medical College of Wisconsin (US)
  • Scripps Research Institute (US)
Corresponding author
Hill, M N
Venue
Molecular Psychiatry
Published
2012-07-10
Volume
18
Issue
10
Pages
1125-1135
ISSN
  • 1359-4184 (ISSN-L)
  • 1476-5578
OpenAlex
W2090774121
Cited by
222
References
77
Citations by year
2026: 5 · 2025: 11 · 2024: 13 · 2023: 13 · 2022: 18 · 2021: 20 · 2020: 18 · 2019: 14 · 2018: 15 · 2017: 23 · 2016: 13 · 2015: 30 · 2014: 9 · 2013: 15 · 2012: 4
FWCI
13.64
Type
journal article
Language
en
Open access
Locations
  • Molecular Psychiatry (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health
  • Johnson and Johnson
  • Canadian Institutes of Health Research
  • National Centre for Biological Sciences
  • National Institute of Mental Health (MH-41256, R37MH041256, R01MH041256)
  • National Institute on Drug Abuse (R01DA026996, R01DA009155, DA09155, DA026996)
  • Janssen Research and Development
Topics
  • Health Sciences › Medicine › Pharmacology › Cannabis and Cannabinoid Research
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
fatty acid amide hydrolase, FAAH inhibition, chronic stress, anxiety-like behavior, amygdala, endocannabinoid system, basolateral amygdala, dendritic spine density, pyramidal neurons, restraint stress, anxiety disorders, neuroplasticity
MeSH terms
Fatty Acid Amide Hydrolases, Amidohydrolases, Amygdala, Animals, Anxiety, Arachidonic Acids, Chronic Disease, Cyclohexanols, Dendrites, Drug Evaluation, Preclinical, Exploratory Behavior, Male, Mice, Inbred C57BL, Restraint, Physical, Stress, Psychological, Rats, Sprague-Dawley, Pyramidal Cells, Mice, Knockout, Maze Learning, Receptor, Cannabinoid, CB1, Mice, Rats, Polyunsaturated Alkamides, Endocannabinoids

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