Peripheral T-cell lymphomas. Immunoregulatory cytokine (interleukin-2, interleukin-4, and interferon-gamma) abnormalities and autologous mixed lymphocyte reaction.
BACKGROUND
Cytokines are the most important secretions of the immune system and have a wide range of immunoregulatory functions in various immune disorders and T-cell malignancy. The authors have determined that characteristic enhanced autologous mixed lymphocyte reaction (AMLR) of the lymph node-derived malignant T-cells from peripheral T-cell lymphomas is a function of the T-cell derived cytokines interleukin (IL)-2, IL-4, and interferon-gamma (IFN-tau).


METHODS
Autologous mixed lymphocyte reaction assay was performed by the standard proliferative response (3H-thymidine incorporation), by culturing autologous lymph node-derived or blood-purified T-cells with autologous blood-purified mitomycin-c treated non-T-cells. The production of IL-2, IL-4, and IFN-tau in the AMLR cultures was determined by bioassay or enzyme immunoassays.


RESULTS
Enhanced IL-2 and IFN-tau but deficient IL-4 production is the most characteristic and unique feature of the augmented AMLR in peripheral T-cell lymphomas.


CONCLUSIONS
The immunoregulatory aberrations in lymph node-derived malignant T-cells that produce highly elevated IL-2 and IFN-tau but decreased IL-4 during augmented AMLR may play an important role in immune dysfunction in this neoplasm (peripheral T-cell lymphomas).
Department of Clinical Immunology, King Saud University, College of Medicine, Abha, Saudi Arabia.
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S
Raziuddin
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Abu-Eshy
A
A
Sheikha
D000368:Aged; D000911:Antibodies, Monoclonal; D016207:Cytokines / Q000096:biosynthesis*; D005260:Female; D005455:Fluorescent Antibody Technique; D006801:Humans; D016130:Immunophenotyping; D007371:Interferon-gamma / Q000096:biosynthesis; D007376:Interleukin-2 / Q000096:biosynthesis; D015847:Interleukin-4 / Q000096:biosynthesis; D008213:Lymphocyte Activation; D007959:Lymphocyte Culture Test, Mixed; D016411:Lymphoma, T-Cell, Peripheral / Q000276:immunology*; D008297:Male; D008875:Middle Aged; D013601:T-Lymphocytes / Q000276:immunology
D000911:Antibodies, Monoclonal; D016207:Cytokines; D007376:Interleukin-2; D015847:Interleukin-4; D007371:Interferon-gamma