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Phenotypic diversity in leukemia cell populations.

L Olsson

    Cancer Metastasis Reviews
    |January 1, 1983
    PubMed
    Summary
    This summary is machine-generated.

    Intratumoral antigenic heterogeneity (IAH) in acute leukemias, including T-lymphoblastic leukemia and acute myeloid leukemia, negatively impacts monoclonal antibody therapies. Identifying these diverse malignant cell subsets is crucial for effective cancer diagnosis and treatment.

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    Area of Science:

    • Oncology
    • Immunology
    • Hematology

    Background:

    • Acute leukemias are diverse diseases identified by morphology and immunological markers.
    • Phenotypic heterogeneity within leukemia cell populations can impact therapeutic strategies.
    • Murine AKR leukemia exhibits antigenic heterogeneity, affecting monoclonal antibody (Mab) efficacy.

    Purpose of the Study:

    • To investigate intratumoral antigenic heterogeneity (IAH) in human acute leukemias.
    • To assess the impact of IAH on the utility of monoclonal antibodies (Mabs) in cancer therapy.
    • To highlight the significance of identifying diverse malignant cell subsets for improved cancer treatment.

    Main Methods:

    • Analysis of human T-lymphoblastic leukemias using Mabs against HLA class I, HLA class II, and T-lymphocyte differentiation antigens.

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  • Generation of high-specificity Mabs against acute myeloid leukemia (AML) cells.
  • Analysis of over 50 AML patient samples for reactivity patterns and IAH.

    • Main Results:

    • 21 out of 24 human T-lymphoblastic leukemias showed intratumoral heterogeneity.
    • Significant differences in Mab reactivity patterns were observed across AML samples.
    • Pronounced IAH was found in most AML samples regarding Mab reactivity and MHC antigen expression.

    Conclusions:

    • IAH negatively impacts the clinical application of Mabs in oncology.
    • IAH exemplifies the phenotypic diversity inherent in malignant neoplasms.
    • Characterizing IAH is critical for developing targeted Mabs for cancer diagnosis and therapy, potentially combined with differentiation-inducing drugs.