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T lymphocyte function in hairy cell leukaemia

L J Sabbe, C J Meijer, J Jansen

    Clinical and Experimental Immunology
    |November 1, 1980
    PubMed
    Summary
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    Patients with hairy cell leukemia exhibit impaired T lymphocyte function, leading to reduced responses to mitogens and antigens. This cellular immunity deficit may explain their increased susceptibility to infections.

    Area of Science:

    • Immunology
    • Hematology
    • Oncology

    Background:

    • Hairy cell leukemia (HCL) is associated with frequent infections, suggesting immune dysfunction.
    • Cell-mediated immunity, primarily mediated by T lymphocytes, is crucial for fighting infections.

    Purpose of the Study:

    • To investigate T lymphocyte function in patients with hairy cell leukemia.
    • To identify potential causes for impaired T cell responses in HCL.

    Main Methods:

    • Studied T lymphocyte function using the lymphocyte transformation test in 16 HCL patients.
    • Assessed responses to mitogens and specific antigens (e.g., PPD).

    Main Results:

    • All HCL patients showed impaired T cell responses to mitogens.

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  • Causes included dilution of T cells by hairy cells, monocyte deficiency, and reduced T cells with Fc receptors.
  • Responses to antigens were severely depressed, with only half reacting to PPD.

    • Conclusions:

    • T lymphocyte function is significantly impaired in hairy cell leukemia patients.
    • This impairment in cellular immunity likely contributes to their increased risk of infections.