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Related Experiment Videos

Desmosome development in an in vitro model

H M Dembitzer, F Herz, A Schermer

    The Journal of Cell Biology
    |June 1, 1980
    PubMed
    Summary
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    This study introduces a novel in vitro model for observing desmosome formation. The model tracks the rapid assembly of desmosomes, crucial cell adhesion structures, within 90 minutes.

    Area of Science:

    • Cell Biology
    • Biochemistry
    • Biophysics

    Background:

    • Desmosomes are vital intercellular junctions for tissue integrity.
    • Understanding desmosome formation is key to cell adhesion research.
    • Previous models lacked temporal resolution for early events.

    Purpose of the Study:

    • To develop and validate a novel in vitro model for studying desmosome formation.
    • To elucidate the temporal sequence of molecular events during desmosome assembly.
    • To analyze the dynamic changes in cell membranes and extracellular matrix during junctionogenesis.

    Main Methods:

    • Utilized differential labeling of two human cancer cell subpopulations (C4I).
    • Incubated labeled cells separately to allow surface repair and fragment internalization.

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  • Mixed cell populations and fixed at timed intervals to capture dynamic formation stages.

    • Main Results:

    • Desmosome formation initiated within minutes of cell aggregation.
    • Submembrane densities appeared within 15 minutes, followed by filament formation (15-30 min).
    • Complete desmosome assembly observed by 90 minutes, with associated extracellular matrix changes.

    Conclusions:

    • The developed model accurately captures the dynamic process of desmosome formation in vitro.
    • Provides a detailed timeline of key molecular events in desmosome assembly.
    • Offers a valuable tool for future research into cell adhesion and tissue development.