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Cell-cell channel formation and lectins.

E Levine1, R Werner, G Dahl

  • 1Department of Physiology and Biophysics, University of Miami School of Medicine, Florida 33101.

The American Journal of Physiology
|December 1, 1991
PubMed
Summary
This summary is machine-generated.

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Lectins enhance cell-cell channel formation in oocytes by promoting connexin precursor clustering. This process involves lectin receptor endocytosis, reducing steric hindrance and facilitating channel assembly.

Area of Science:

  • Cell Biology
  • Membrane Biophysics
  • Molecular Medicine

Background:

  • Oocyte cell-cell channel formation is crucial for intercellular communication.
  • Connexin-specific mRNA injection leads to precursor accumulation for channel assembly.
  • Factors influencing the rate of channel formation require investigation.

Purpose of the Study:

  • To investigate the determinants of cell-cell channel formation rate in oocytes.
  • To elucidate the role of lectins in modulating channel formation.
  • To understand the mechanism by which lectins influence channel assembly.

Main Methods:

  • Oocyte cell-cell channel assay using connexin-specific mRNA.
  • Pretreatment of oocytes with various lectins prior to pairing.

Related Experiment Videos

  • Application of lectin-specific sugars to assess inhibition.
  • Electron microscopy with gold-conjugated lectins for receptor localization.

    • Main Results:

    • Lectins significantly increased the rate of cell-cell channel formation.
    • Lectin-specific sugars inhibited channel formation only when pre-mixed with lectins.
    • An incubation period post-lectin treatment enhanced the effect.
    • Electron microscopy revealed lectin receptor clustering and endocytosis.

    Conclusions:

    • Lectins accelerate cell-cell channel formation by reducing steric hindrance.
    • Endocytosis of clustered lectin receptors facilitates channel assembly.
    • This mechanism highlights the role of membrane dynamics in intercellular communication.