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Related Experiment Videos

Expression of gap junction genes during postnatal neural development.

D J Belliveau1, G M Kidder, C C Naus

  • 1Department of Anatomy, University of Western Ontario, London Canada.

Developmental Genetics
|January 1, 1991
PubMed
Summary

This study tracks the expression of gap junction proteins connexin32 and connexin43 during rat and mouse brain development. Both mRNA and protein levels show distinct developmental patterns, indicating differential gene expression.

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Developmental Biology

Background:

  • Gap junctions are crucial for intercellular communication in the brain.
  • Connexin32 and connexin43 are key gap junction proteins with distinct tissue distributions.
  • Understanding their developmental expression is vital for comprehending neural circuit formation.

Purpose of the Study:

  • To investigate the developmental timing of connexin32 and connexin43 mRNA and protein appearance in the developing rat and mouse brain.
  • To determine if the expression patterns of these two connexins differ during neural development.

Main Methods:

  • Northern blot analysis was used to detect and quantify mRNA levels.
  • Complementary DNA (cDNA) probes specific for connexin32 and connexin43 were employed.

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  • RNA was isolated from forebrain and hindbrain of mice and rats at various developmental stages.

    • Main Results:

    • Connexin32 mRNA levels were low before postnatal day 10, with a sharp increase observed between days 10-16, first in the hindbrain, then forebrain.
    • Connexin43 mRNA was detectable at birth and increased with development.
    • Developmental protein expression mirrored mRNA patterns for both connexins.

    Conclusions:

    • Connexin32 and connexin43 genes exhibit differential expression patterns during brain development.
    • This differential expression suggests distinct roles for these gap junction proteins in forming neural circuits.