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Strain differences in mouse brain weight gain and spatial-location scores during postnatal development.

H T Epstein1, M Kaufman, A Saperstein

  • 1Biology Department, Brandeis University, Waltham, Mass.

Biology of the Neonate
|January 1, 1991
PubMed
Summary

Mouse brain growth and spatial-location test performance reveal strain-specific developmental timelines. Delayed brain growth in Balb/c and F1 crosses suggests inhibitory factors influence development.

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Animal Models

Background:

  • Brain development is crucial for cognitive functions.
  • Understanding genetic influences on brain growth is essential.
  • Spatial-location memory is a key indicator of neurological development.

Purpose of the Study:

  • To investigate the relationship between brain growth and spatial-location test performance in different mouse strains.
  • To identify developmental differences in brain growth and cognitive function across strains.
  • To explore potential genetic mechanisms underlying variations in brain development.

Main Methods:

  • Comparative analysis of brain weight and spatial-location test scores from birth to weaning.
  • Longitudinal study across three mouse strains: CD1, Balb/c, and their F1 cross.

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  • Assessment of developmental milestones including onset and asymptote of rapid brain growth and test performance.

    • Main Results:

    • CD1 mice showed rapid brain growth and spatial-location test proficiency onset around 17 days, reaching asymptotes by 23 days.
    • Balb/c and F1 hybrid mice exhibited a 5- to 6-day delay in both brain growth and cognitive test performance onsets and asymptotes.
    • Onset of nonzero spatial-location test scores may serve as an early indicator for significant brain growth post-15 days.

    Conclusions:

    • Spatial-location test performance correlates with rapid brain growth stages in mice.
    • The delayed development in Balb/c and F1 strains suggests the presence of inhibitory factors affecting brain growth around 20 days.
    • Genetic factors, potentially an inhibitory factor in Balb/c mice, play a significant role in regulating brain growth timing and extent.