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Related Experiment Videos

Reflexive gap junctions on uterine luminal epithelial cells

C R Murphy, J G Swift, T M Mukherjee

    Acta Anatomica
    |January 1, 1982
    PubMed
    Summary

    Researchers discovered reflexive gap junctions on rat uterine epithelial cells using freeze-fracture electron microscopy. These junctions, composed of numerous particles, may play a role in uterine function.

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    ICAM-2 and lipid rafts disappear from the basal plasma membrane of uterine epithelial cells during early pregnancy in rats.

    Cell and tissue research·2013

    Area of Science:

    • Cell Biology
    • Reproductive Biology
    • Microscopy

    Background:

    • Gap junctions are crucial for intercellular communication in various tissues.
    • The apical projections of uterine epithelial cells are specialized structures with incompletely understood functions.
    • Reflexive gap junctions, where junctions connect adjacent cells within the same membrane leaflet, are rare and poorly characterized.

    Purpose of the Study:

    • To investigate the presence and structure of reflexive gap junctions on apical projections of rat uterine epithelial cells.
    • To characterize the morphology and particle composition of these potential junctions.
    • To explore possible functional implications of these observed structures.

    Main Methods:

    • Utilized freeze-fracture electron microscopy, a technique ideal for visualizing membrane ultrastructure.
    • Examined ultrathin sections of rat uterine tissue to identify specific cellular structures.
    • Analyzed images to quantify the presence, size, and particle density of identified junctions.

    Main Results:

    • Reflexive gap junctions were identified in 5 out of 6 studied rats.
    • These junctions comprised 15 to over 70 intramembranous particles.
    • The intramembranous particles ranged in size from 7 to 9 nm.

    Conclusions:

    • The study provides evidence for the existence of reflexive gap junctions on rat uterine epithelial cell apical projections.
    • The characterized morphology suggests a role in intercellular communication or structural support within the uterine epithelium.
    • Further research is warranted to elucidate the precise physiological function of these enigmatic junctions in uterine biology.

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