Cited by 84Obsessive-Compulsive Spectrum DisordersNeuroscience and Neuropharmacology ResearchNeurotransmitter Receptor Influence on Behavior

Increased Metabotropic Glutamate Receptor 5 Signaling Underlies Obsessive-Compulsive Disorder-like Behavioral and Striatal Circuit Abnormalities in Mice

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Ade, Kristen K., Wan, Yehong, Hamann, Harold C., O’Hare, Justin K., Guo, Weirui, Quian, Anna, Kumar, Sunil, Bhagat, Srishti +6 more·2016·Biological Psychiatry

Abstract

Background Development of treatments for obsessive-compulsive disorder (OCD) is hampered by a lack of mechanistic understanding about this prevalent neuropsychiatric condition. Although circuit changes such as elevated frontostriatal activity are linked to OCD, the underlying molecular signaling that drives OCD-related behaviors remains largely unknown. Here, we examine the significance of type 5 metabotropic glutamate receptors (mGluR5s) for behavioral and circuit abnormalities relevant to OCD.Methods Sapap3 knockout (KO) mice treated acutely with an mGluR5 antagonist were evaluated for OCD-relevant phenotypes of self-grooming, anxiety-like behaviors, and increased striatal activity. The role of mGluR5 in the striatal circuit abnormalities of Sapap3 KO mice was further explored using two-photon calcium imaging to monitor striatal output from the direct and indirect pathways. A contribution of constitutive signaling to increased striatal mGluR5 activity in Sapap3 KO mice was investigated using pharmacologic and biochemical approaches. Finally, sufficiency of mGluR5 to drive OCD-like behavior in wild-type mice was tested by potentiating mGluR5 with a positive allosteric modulator.Results Excessive mGluR5 signaling underlies OCD-like behaviors and striatal circuit abnormalities in Sapap3 KO mice. Accordingly, enhancing mGluR5 activity acutely recapitulates these behavioral phenotypes in wild-type mice. In Sapap3 KO mice, elevated mGluR5 signaling is associated with constitutively active receptors and increased and imbalanced striatal output that is acutely corrected by antagonizing striatal mGluR5.Conclusions These findings demonstrate a causal role for increased mGluR5 signaling in driving striatal output abnormalities and behaviors with relevance to OCD and show the tractability of acute mGluR5 inhibition to remedy circuit and behavioral abnormalities.

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Crossref · 10.1016/j.biopsych.2016.04.023

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  • Sapap3-KO mice exhibit anxiety-like behavior.

    “Such phenotypes are excessive grooming [9][10][11], anxiety-like behavior [9,12], behavioral inflexibility [13,14], and deficits in the balance of habitual and goal-directed behavior [15,16].”
  • Excessive grooming in Sapap3-KO mice has been consistently observed across experimental conditions, including testing during light cycle and during the dark period.

    “In contrast, excessive grooming in Sapap3-KO mice has been consistently observed across experimental conditions, including testing during light cycle [9,12,13] and during the dark period [9,10,17,33], which shows the robustness of the phenotype.”

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Authors
Ade, K. K., Wan, Y., Hamann, H. C., O’Hare, J. K., Guo, W., Quian, A., Kumar, S., Bhagat, S., Rodriguiz, R. M., Wetsel, W. C., Conn, P. J., Dzirasa, K., Huber, K. M., & Calakos, N.
Affiliations
  • Duke University (US)
  • Duke Medical Center (US)
  • The University of Texas Southwestern Medical Center (US)
  • Vanderbilt University (US)
Corresponding author
Calakos, Nicole
Venue
Biological Psychiatry
Publisher
Elsevier BV
Published
2016-10
Volume
80
Issue
7
Pages
522-533
ISSN
0006-3223 (ISSN-L)
OpenAlex
W2385482058
Cited by
84
References
64
Citations by year
2026: 6 · 2025: 5 · 2024: 11 · 2023: 5 · 2022: 10 · 2021: 10 · 2020: 8 · 2019: 9 · 2018: 10 · 2017: 8 · 2016: 1
FWCI
12.48
Type
journal article
Language
en
Open access
Locations
  • Biological Psychiatry (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institute of Mental Health (R01MH062646)
  • National Institute of General Medical Sciences (T32GM007171, T32GM008441)
  • National Institute of Neurological Disorders and Stroke (R01NS064577, T32NS051156, R01NS045711, R37NS031373)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (U54HD083211)
Topics
  • Social Sciences › Psychology › Clinical Psychology › Obsessive-Compulsive Spectrum Disorders
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
Keywords
obsessive-compulsive disorder, metabotropic glutamate receptor 5, direct and indirect striatal pathways, self-grooming, anxiety-like behavior, constitutively active receptor, mGluR5 antagonist, frontostriatal circuits
MeSH terms
Animals, Behavior, Animal, Corpus Striatum, Glycine, Grooming, Mice, Transgenic, Nerve Tissue Proteins, Niacinamide, Obsessive-Compulsive Disorder, Pyridines, Thiazoles, Signal Transduction, Mice, Knockout, Excitatory Amino Acid Agonists, Excitatory Amino Acid Antagonists, Mice, Receptor, Metabotropic Glutamate 5

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