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Dihydrotestosterone modulates spatial working-memory performance in male mice.

Ted S Benice1, Jacob Raber

  • 1Department of Behavioral Neuroscience, Oregon Health & Science University, Portland, Oregon 97239, USA.

Journal of Neurochemistry
|May 22, 2009
PubMed
Summary

Androgens specifically impact spatial working memory in male mice. Testosterone replacement therapy can restore this memory, suggesting targeted effects on cognitive function.

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Area of Science:

  • Neuroscience
  • Behavioral Endocrinology
  • Cognitive Psychology

Background:

  • Androgens are known to influence cognitive functions in various species.
  • The specific cognitive domains affected by androgens, particularly spatial memory, require further elucidation.

Purpose of the Study:

  • To investigate whether androgens affect multiple or specific cognitive domains in male mice.
  • To determine the impact of castration and androgen replacement on spatial working memory.

Main Methods:

  • Castration and sham-operation in male mice.
  • Behavioral testing including delayed matching to place water maze, novel object recognition, and motor coordination tasks.
  • Assessment of anxiety-like behaviors and androgen replacement with dihydrotestosterone.

Main Results:

  • Castration impaired spatial working memory with a 1-h retention interval but not 1-min.
  • No effects of castration were observed on novel object recognition, spatial reference memory, motor coordination, or passive avoidance.
  • Dihydrotestosterone replacement recovered spatial memory performance at a 24-h retention interval.

Conclusions:

  • Androgens specifically modulate spatial working memory performance in male mice.
  • The neurobiological mechanisms of spatial memory formation are differentially influenced by androgens.
  • Findings highlight the specific role of androgens in certain cognitive processes.