Cited by 112Genetics and Neurodevelopmental DisordersNeuroendocrine regulation and behaviorNeuroscience and Neuropharmacology Research

Dissociation of social and nonsocial anxiety in a mouse model of fragile X syndrome.

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Liu, Zhong-Hua, Smith, Carolyn Beebe·2009·Neuroscience Letters

Abstract

Anxiety is a common symptom in fragile X patients. However, an anxiety-prone phenotype in mouse models of fragile X syndrome is not clear. In most studies of fmr1 knockout mice, decreased anxiety-like responses in exploratory-based models are found, but mice also exhibit abnormal social interactions. We hypothesize the coexistence of elevated social anxiety and reduced nonsocial anxiety in fmr1 knockout mice. In the present study, we applied an automated three-chambered social approach method and the elevated zero maze test to further investigate social interactions and general anxiety, respectively. Results indicate lower levels of both social approach behavior and response to social novelty in fmr1 knockout mice compared with wild-type littermates in the social interaction test. In the elevated zero maze, fmr1 knockout mice spent a greater percent time in open quadrants than wild-type mice, suggesting reduced nonsocial anxiety. These findings support the hypothesis that social and nonsocial anxiety can be dissociated and that in the fragile X mouse model, behavior consistent with hyper-social anxiety coexists with hypo-nonsocial anxiety.

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Crossref · 10.1016/j.neulet.2009.02.066

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  • The Fmr1 knockout mouse model lacks FMRP and recapitulates the main FXS phenotype, including deficiency in learning and memory, social behavior, and sensory processing.

    “The mouse model of FXS, the Fmr1 knockout (KO) mice, lacks FMRP and recapitulates the main phenotype, including deficiency in learning and memory, social behavior, and sensory processing (Bassell and Warren, 2008; Liu and Smith, 2009).”

    From Astrocytes in fragile X syndrome (2024) · cites this paper as Liu and Smith, 2009

    The paper’s opening passage (section labeled Abstract; page unavailable) says Fmr1 knockout mice lack FMRP and show some learning impairments and social abnormalities comparable to those in people with FXS. It does not establish memory deficiency or impaired sensory processing in the knockout mice; its mention of low visual acuity concerns the background strain, not a knockout-specific deficit. (LLM, conf=0.86)

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  1. [8]Garau A Martí MA Sala J Balada F Age effects on the social interaction test in early adulthood male rats. Depress Anxiety 2000 12 226 31 11195759

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Authors
Liu, Z.-H., & Smith, C. B.
Affiliations
United States Department of Health and Human Services (US)
Corresponding author
Smith, Carolyn Beebe
Venue
Neuroscience Letters
Publisher
Elsevier BV
Published
2009-04
Volume
454
Issue
1
Pages
62-66
ISSN
0304-3940 (ISSN-L)
OpenAlex
W2089667232
Cited by
112
References
35
Citations by year
2026: 1 · 2025: 2 · 2024: 8 · 2023: 4 · 2022: 5 · 2021: 4 · 2020: 2 · 2019: 4 · 2018: 7 · 2017: 13 · 2016: 10 · 2015: 8 · 2014: 8 · 2013: 2 · 2012: 11
FWCI
6.63
Type
journal article
Language
en
Open access
Locations
  • Neuroscience Letters (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health
  • National Institute of Mental Health (ZIAMH000889)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
  • Social Sciences › Psychology › Social Psychology › Neuroendocrine regulation and behavior
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
fragile X syndrome, social anxiety, social approach behavior, social novelty, elevated zero maze, anxiety-like behavior, social interaction
MeSH terms
Animals, Anxiety, Behavior, Animal, Disease Models, Animal, Female, Fragile X Syndrome, Male, Social Behavior, Mice, Knockout, Mice, Fragile X Mental Retardation Protein, Fragile X Messenger Ribonucleoprotein 1

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