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Related Experiment Videos

Spatial exploration in transgenic mice expressing human beta-S100

C Janus1, M Janus, J Roder

  • 1Department of Psychology, University of Toronto, Ontario, Canada.

Neurobiology of Learning and Memory
|July 1, 1995
PubMed
Summary

Overexpressing the beta-S100 gene in mice reduced exploratory behavior and reactivity to novel stimuli, suggesting a role for this calcium-binding protein in spatial learning and environmental exploration.

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Behavioral Science

Background:

  • Beta-S100 is a calcium-binding protein in the central nervous system (CNS).
  • It plays a role in nervous system development and potentially in hippocampal long-term potentiation (LTP).

Purpose of the Study:

  • To investigate the role of beta-S100 protein in behavior related to hippocampal function.
  • To examine the effects of beta-S100 gene overexpression on exploratory behavior in mice.

Main Methods:

  • Overexpression of the beta-S100 gene (80 copies) in CD-1 transgenic mice.
  • Observation of exploratory behavior in an open-field arena with novel objects across two experiments.
  • Assessment of emotional behaviors including motility, defecation, and urination.

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Main Results:

  • Transgenic mice showed significantly less object exploration and no overt response to object displacement compared to controls.
  • No differences in general emotional behaviors were observed between groups.
  • Transgenic mice exhibited reduced object climbing and longer latencies to approach objects.

Conclusions:

  • Beta-S100 protein may be involved in general exploratory behavior and spatial learning.
  • Overexpression of the beta-S100 gene affects reactivity to novel stimuli and arousal properties of the environment.