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Fetal antigens in human leukemia

C H Granatek, M G Hanna, E M Hersh

    Cancer Research
    |September 1, 1976
    PubMed
    Summary

    Immunizing mice with leukemia cells reduced fetal liver colony formation. A specific antigen, present in leukemia patients and fetal liver cells, was identified and characterized using antiserum.

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    Area of Science:

    • Immunology
    • Hematology
    • Oncology

    Background:

    • Leukemia involves uncontrolled proliferation of hematopoietic cells.
    • Fetal liver is a primary site of hematopoiesis during development.
    • Understanding leukemia-associated antigens is crucial for developing targeted therapies.

    Purpose of the Study:

    • To investigate the immunogenicity of human leukemic blasts in a murine model.
    • To identify and characterize fetal antigens present in leukemia patients.
    • To explore the potential of these antigens as diagnostic or therapeutic targets.

    Main Methods:

    • Immunization of BALB/c mice with human peripheral leukemic blasts.
    • Assessment of hematopoietic colony formation in spleen after irradiation and challenge.
    • Detection of fetal antigen using indirect immunofluorescence and rabbit antiserum.
    • Affinity column separation and polyacrylamide gel electrophoresis (PAGE) for protein identification.

    Main Results:

    • Immunization reduced syngeneic fetal liver hematopoietic colonies in the spleen.
    • Fetal antigen was detected in lymphocytic and myelocytic leukemia patients, correlating with low sialic acid levels.
    • Antiserum against fetal liver cells reacted strongly with leukemic blasts and bone marrow cells.
    • Four common protein bands were identified from fetal liver and leukemia extracts.

    Conclusions:

    • Human leukemic blasts possess immunogenic properties that can affect hematopoietic colony formation.
    • A shared antigen between fetal liver cells and leukemia cells was identified and partially characterized.
    • This antigen represents a potential target for immunotherapy or diagnostics in leukemia.

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