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Isoform-specific roles for AKT in affective behavior, spatial memory, and extinction related to psychiatric disorders.


ABSTRACT: AKT is implicated in neurological disorders. AKT has three isoforms, AKT1/AKT2/AKT3, with brain cell type-specific expression that may differentially influence behavior. Therefore, we examined single Akt isoform, conditional brain-specific Akt1, and double Akt1/3 mutant mice in behaviors relevant to neuropsychiatric disorders. Because sex is a determinant of these disorders but poorly understood, sex was an experimental variable in our design. Our studies revealed AKT isoform- and sex-specific effects on anxiety, spatial and contextual memory, and fear extinction. In Akt1 mutant males, viral-mediated AKT1 restoration in the prefrontal cortex rescued extinction phenotypes. We identified a novel role for AKT2 and overlapping roles for AKT1 and AKT3 in long-term memory. Finally, we found that sex-specific behavior effects were not mediated by AKT expression or activation differences between sexes. These results highlight sex as a biological variable and isoform- or cell type-specific AKT signaling as potential targets for improving treatment of neuropsychiatric disorders.

SUBMITTER: Wong H 

PROVIDER: S-EPMC7787664 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature

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Isoform-specific roles for AKT in affective behavior, spatial memory, and extinction related to psychiatric disorders.

Wong Helen H   Levenga Josien J   LaPlante Lauren L   Keller Bailey B   Cooper-Sansone Andrew A   Borski Curtis C   Milstead Ryan R   Ehringer Marissa M   Hoeffer Charles C  

eLife 20201216


AKT is implicated in neurological disorders. AKT has three isoforms, AKT1/AKT2/AKT3, with brain cell type-specific expression that may differentially influence behavior. Therefore, we examined single <i>Akt</i> isoform, conditional brain-specific <i>Akt1</i>, and double <i>Akt1/3</i> mutant mice in behaviors relevant to neuropsychiatric disorders. Because sex is a determinant of these disorders but poorly understood, sex was an experimental variable in our design. Our studies revealed AKT isofor  ...[more]

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