Abstract
Pou3f2/Brn2 is a transcription factor that helps to determine the cellular identity of neocortical or hypothalamic neurons. Mammalian Pou3f2 contains three homopolymeric amino acids that are not present in amphibian Pou3f2. These amino acids contribute to monoamine function, which may play specific roles in mammalian development and behavior. Previous work has indicated that Pou3f2⊿ mice, which lack the homopolymeric amino acids, exhibited declined maternal activity and impaired object and spatial recognition. The current study, analyzed weight gain, brain development, home cage activity, social interaction, and response to novel objects in Pou3f2⊿ mice to determine which aspects of behavior were affected by monoamine dysregulation. Compared to their wild type counterparts, Pou3f2⊿ mice showed decreased social interaction and reduced home cage activity during their active phase. However, they showed normal weight gain, brain development, and responses to novelty. These results indicate that monoamine dysregulation in Pou3f2⊿ mice may specifically affect basal activity and social development, without altering non-social motivation.
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