Archive of Oncology 2002 Volume 10, Issue 1, Pages: 19-23
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Effects of immunoregulatory drugs on human peripheral blood T lymphocytes function in vitro

Hatzistilianou Marija, Hitoglou Soultana, Gougoustamou Despina, Kotsis Alexandros, Kallinderes Athanasios, Athanassiadou Fanni, Catriu Dorothea

BACKGROUND: The purpose of the study was to evaluate the mode of action of different immunoregulatory drugs in lymphocyte proliferation and activation METHODS: The drugs studied were prednisolone (PRED), cyclosporin A (CsA) the recombination of PRED and CsA, L-asparaginase and cytosine-arabinose (ara-C). Peripheral blood lymphocytes from normal blood donors were stimulated by phytohemagglutinin (PHA). Lymphocytes proliferation and activation were determined by tritiated thymidine ([3H]TdR) incorporation secretion of interleukin-2, level of soluble interleukin-2 receptors in the supernatant of the culture medium, and immunophenotyping analysis of T lymphocyte subsets. RESULTS: Among PRED CsA and their combination, the strongest inhibition of cell proliferation was induced by PRED while L-asparaginase and ara-C inhibited PHA stimulated T cells proliferation in concentration and time dependent manner. Among PRED, CsA and their combination, CsA induced the greatest inhibition of IL-2 production. All the immunoregulatory drugs inhibited lymphocyte proliferation and expression of activation antigens. CONCLUSION: The immunoregulatory drugs inhibit both lymphocyte proliferation and activation but in a different way.

Keywords: T Lymphocytes, prednisolone, cyclosporine, cytarabine, asparaginase

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