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Related Experiment Videos

Chemotactic cell sorting in Dictyostelium discoideum.

S Matsukuma, A J Durston

    Journal of Embryology and Experimental Morphology
    |April 1, 1979
    PubMed
    Summary

    Dictyostelium discoideum prestalk cells sort towards cyclic-AMP (c-AMP) signals, demonstrating chemotaxis. This directed cell movement explains natural cell sorting during development.

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    Seminars in cell & developmental biology·2015

    Area of Science:

    • Cell Biology
    • Developmental Biology
    • Biochemistry

    Background:

    • Cell sorting is crucial for multicellular organism development.
    • Dictyostelium discoideum (Dd) serves as a model organism for studying cellular differentiation and morphogenesis.
    • Chemotaxis, or directed cell movement in response to chemical gradients, is a fundamental biological process.

    Purpose of the Study:

    • To investigate the role of chemotaxis in cell sorting during Dictyostelium discoideum development.
    • To determine if prestalk cells exhibit directed movement towards cyclic-AMP (c-AMP) sources.
    • To provide evidence supporting chemotaxis as the mechanism for natural cell sorting in Dd.

    Main Methods:

    • Creating mixed cell mounds of vitally stained prestalk and unstained prespore cells from Dictyostelium discoideum.
    • Exposing these mixed cell mounds to controlled external 3',5'-cyclic-AMP (c-AMP) concentrations.
    • Observing and analyzing the directional movement of prestalk cells in response to c-AMP gradients.

    Main Results:

    • Prestalk cells demonstrated directional movement towards c-AMP sources.
    • This directed movement was observed at c-AMP concentrations below 10(-5) M.
    • The observed cell sorting behavior is consistent with chemotaxis.

    Conclusions:

    • Cell sorting in Dictyostelium discoideum is mediated by chemotaxis towards cyclic-AMP.
    • Prestalk cells possess the ability to sense and migrate towards c-AMP gradients.
    • Chemotaxis provides a mechanistic explanation for the spatial organization of cells during Dd development.

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