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Phosphofructokinase in human blood cells.

M C Meienhofer, J L Lagrange, D Cottreau

    Blood
    |August 1, 1979
    PubMed
    Summary

    Phosphofructokinase subunit composition varies in blood cells, with distinct forms in normal, malignant, and cultured cells. This enzyme

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    Area of Science:

    • Biochemistry
    • Cell Biology
    • Hematology

    Background:

    • Phosphofructokinase (PFK) is a key glycolytic enzyme.
    • Its subunit composition (M, L, F types) varies across human tissues.
    • Understanding PFK isozymes in blood cells is crucial for diagnostics.

    Purpose of the Study:

    • To investigate the subunit composition of phosphofructokinase in normal and malignant blood cells.
    • To characterize PFK isozymes in platelets and white blood cells.
    • To explore PFK as a potential marker for leukemic cell characterization.

    Main Methods:

    • Immunoprecipitation using specific antisera against M, L, and F subunits.
    • Electrophoretic separation of enzyme subunits.
    • Chromatographic analysis, including DEAE-Cellulose chromatography.

    Main Results:

    • Mature polymorphonuclear cells primarily contain L-subunits.
    • Lymphocytes and platelets exhibit L and F subunit hybrids.
    • Red blood cell PFK comprises L and M subunits.
    • Leukemic lymphocytes show similar PFK forms to normal lymphocytes.
    • Immature granulocytic cells display increased F-type subunit inhibition.
    • Cultured lymphoid lines express all three subunits indistinctly.

    Conclusions:

    • This study provides the first description of phosphofructokinase isozymes in platelets and white blood cells.
    • PFK subunit composition changes significantly in malignancy and cell culture.
    • Phosphofructokinase may serve as a valuable marker for characterizing leukemic cells.

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