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Related Experiment Videos

A mitogenic factor for transformed fibroblasts from human platelets.

N Kepner, A Lipton

    Cancer Research
    |February 1, 1981
    PubMed
    Summary

    Human platelets release growth factors that stimulate cell proliferation. A specific heat-labile glycoprotein from platelets promotes SV3T3 cell growth, identified by its isoelectric point.

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    Area of Science:

    • Biochemistry
    • Cell Biology
    • Molecular Biology

    Background:

    • Human platelets contain various glycoproteins.
    • Some glycoproteins are known to stimulate cell growth.
    • Platelet-derived growth factors (PDGFs) are crucial in cellular processes.

    Purpose of the Study:

    • To identify and characterize the specific platelet glycoproteins responsible for promoting cell growth.
    • To investigate the properties of the growth factor that stimulates SV3T3 cells.

    Main Methods:

    • Isolation and purification of glycoproteins from human platelets.
    • Assay of cell growth promotion using 3T3 and SV3T3 cell lines.
    • Characterization of the active glycoprotein, including heat lability, dialyzability, and isoelectric point determination.

    Main Results:

    • Human platelets contain distinct glycoproteins that promote the growth of 3T3 and SV3T3 cells.
    • The growth factor for SV3T3 cells was identified as a heat-labile, nondialyzable glycoprotein.
    • The isoelectric point of this SV3T3 cell growth factor was determined to be between 7.8 and 8.3.

    Conclusions:

    • Human platelets secrete specific glycoproteins that act as potent mitogens for certain cell types.
    • The SV3T3 cell growth-promoting factor is a well-defined glycoprotein with specific biochemical properties.
    • This research contributes to understanding the role of platelet-derived growth factors in cell proliferation.

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