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Related Experiment Videos

Epidermal growth factor induced membrane changes in 3T3 cells.

A Aharonov, I Vlodavsky, R M Pruss

    Journal of Cellular Physiology
    |May 1, 1978
    PubMed
    Summary

    Epidermal growth factor (EGF) enhances Swiss 3T3 cell binding to Con A fibers, indicating a specific mitogenic response. This effect is not seen in EGF-non-responsive cells or with other growth factors.

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    Area of Science:

    • Cell Biology
    • Molecular Biology
    • Biochemistry

    Background:

    • Epidermal growth factor (EGF) is a key mitogen regulating cell proliferation.
    • Swiss 3T3 cells are a common model for studying growth factor responses.
    • Cell surface interactions are crucial for cellular communication and function.

    Purpose of the Study:

    • To investigate the effect of epidermal growth factor (EGF) on Swiss 3T3 cell adhesion.
    • To determine the specificity of EGF-induced changes in cell-fiber binding.
    • To explore the relationship between EGF signaling and cell surface receptor interactions.

    Main Methods:

    • Incubation of Swiss 3T3 cells with physiological concentrations of EGF.
    • Assessing cell binding to Concanavalin A (Con A)-coated nylon fibers.

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  • Testing responses to other mitogens (insulin, prostaglandin F2alpha, serum) and different cell lines (EGF non-responsive variant, XC cells, Swiss SV3T3 cells).
  • Evaluating Con A-mediated hemadsorption and quantifying Con A receptors.

    • Main Results:

    • EGF significantly increased Swiss 3T3 cell binding to Con A-coated fibers.
    • This effect was specific to EGF and not observed with other tested mitogens.
    • EGF also reduced Con A-mediated hemadsorption, without altering the number of Con A receptors.
    • No effect on Wheat Germ Agglutinin (WGA)-mediated binding was observed.

    Conclusions:

    • EGF induces a specific alteration in Swiss 3T3 cell surface properties, enhancing Con A-mediated adhesion.
    • The findings suggest EGF modulates cell-surface interactions independently of direct changes in Con A receptor numbers.
    • This highlights a specific signaling pathway initiated by EGF affecting cell-substrate interactions.