Three murine anxiety models: results from multiple inbred strain comparisons

Authors

  • L. C. Milner,

    Corresponding author
    1. Department of Behavioral Neuroscience, Portland Alcohol Research Center, Oregon Health & Science University and VA Medical Center, Portland, OR, USA
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  • J. C. Crabbe

    1. Department of Behavioral Neuroscience, Portland Alcohol Research Center, Oregon Health & Science University and VA Medical Center, Portland, OR, USA
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*Lauren C. Milner, Department of Behavioral Neuroscience, Oregon Health & Science University, Mail Code L470, Portland, OR 97239, USA. E-mail: milnerl@ohsu.edu

Abstract

The literature surrounding rodent models of human anxiety disorders is discrepant concerning which models reflect anxiety-like behavior distinct from general activity and whether different models are measuring the same underlying constructs. This experiment compared the responses of 15 inbred mouse strains (129S1/SvlmJ, A/J, AKR/J, BALB/cByJ, C3H/HeJ, C57BL/6J, C57L/J, CBA/J, CE/J, DBA/2J, FVB/NJ, NZB/B1NJ, PL/J, SJL/J and SWR/J) in three anxiety-like behavioral tasks (light/dark test, elevated zero-maze and open field) to examine whether responses were phenotypically and/or genetically correlated across tasks. Significant strain differences were found for all variables examined. Principal components analyses showed that variables associated with both activity and anxiety-like behaviors loaded onto one factor, while urination and defecation loaded onto another factor. Our findings differ from previous research by suggesting that general activity and anxiety-related behaviors are linked, negatively correlated and cannot easily be dissociated in these assays. However, these findings may not necessarily generalize to other unconditioned anxiety-like behavioral tests.

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