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Environmental enrichment eliminates the anxiety phenotypes in a triple transgenic mouse model of Alzheimer's disease

Pietropaolo, Susanna ; Feldon, Joram ; Yee, Benjamin

In: Cognitive, Affective, & Behavioral Neuroscience, 2014, vol. 14, no. 3, p. 996-1008

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    Titel
    • Environmental enrichment eliminates the anxiety phenotypes in a triple transgenic mouse model of Alzheimer's disease
    Autor
    • Pietropaolo, Susanna. Laboratory of Behavioural Neurobiology, Swiss Federal Institute of Technology Zurich, Schorenstrasse 16, 8603, Schwerzenbach, Switzerland
    • Feldon, Joram. Laboratory of Behavioural Neurobiology, Swiss Federal Institute of Technology Zurich, Schorenstrasse 16, 8603, Schwerzenbach, Switzerland
    • Yee, Benjamin. Laboratory of Behavioural Neurobiology, Swiss Federal Institute of Technology Zurich, Schorenstrasse 16, 8603, Schwerzenbach, Switzerland
    Dokumententyp
    • Postprint
    Sprache
    • Englisch
    Veröffentlicht in
    • Cognitive, Affective, & Behavioral Neuroscience, 2014, vol. 14, no. 3, p. 996-1008. Springer US; http://www.springer-ny.com
    Andere elektronische Ausgabe
    OAI-PMH-ID
    • oai:doc.rero.ch:326209
    Summary
    Although the impacts of environmental enrichment (EE) in several genetic models of Alzheimer's disease (AD) have been documented, the focus has remained predominantly on cognition. Few have investigated the expression of emotional phenotypes that mimic the notable affective features in AD. Here, we studied the interaction between EE and the coexpression of three genetic risk factors (mutations) for AD. In a longitudinal design, 3×Tg-AD mutants and wild type controls were compared at 6-7 months and subsequently at 12-13 months of age. Under standard housing, phenotypes of heightened anxiety levels were identified in the 3×Tg-AD mice in the elevated plus maze and open-field tests. Such trait differences between genotypes were substantially diminished under EE housing, which was attributable to the anxiolytic impact of EE on the mutant mice as much as the anxiogenic impact of EE on the wild type mice. In contrast, the phenotypes in learned fear were not significantly modified by EE in the tests of Pavlovian freezing and conditioned active avoidance conducted at either age. Rearing under EE thus has uncovered a novel distinction between innate and acquired expressions of fear response in the 3×Tg-AD mouse model that might be relevant to the mental health management of AD.