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      CD30 expression on allergen- and non-allergen-specific T cell lines and its role in cytokine production.

      Archivum Immunologiae et Therapiae Experimentalis

      chemistry, T-Lymphocytes, analysis, RNA, Messenger, Male, Humans, Female, genetics, blood, biosynthesis, Cytokines, Cell Line, physiology, Antigens, CD30, immunology, Allergens, Adult

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          Interest in CD30 has mainly focused on its ability to discriminate between T helper (Th)2 and Th1 subpopulations. The role of CD30 as the marker for Th2 cells is still controversial, which may be due to the fact that the expression and the role of CD30 is not fully understood. The data presented in this paper provides information on the expression and activity of CD30 in T cell lines specific to allergen or tuberculin-purified protein derivative (PPD) as the model of Th2 or Th1 responses, respectively. The results have shown that CD30 expression was the highest on T cells stimulated with antigen in the presence of interleukin (IL)-12 and it was present on both cell lines, regardless of antigen specificity. Activation of the CD30 receptor on CD4+ T cells, however, showed differences in mRNA expression for IL-4 between these cells. IL-4 mRNA was induced by CD30 costimulation at the same level as was obtained with anti-CD28 agonistic antibodies in allergen-specific T cells. In PPD-specific T cells this effect was not observed. Additionally, there was no effect of anti-CD30 stimulation on IL-6 mRNA expression in any of the cell lines. Comparison of protein cytokine levels for IL-4 and interferon (IFN)-gamma have shown that the highest production of IL-4 was obtained from allergen-specific T cells costimulated with anti-CD28. Although this effect was much lower in the case of CD30 costimulation, it was still above that of anti-CD3 activation alone. No effect of CD30 activation was observed in regard to IFN-gamma mRNA or protein expression in any cell line. The results of the study showed that the CD30 receptor is not exclusively present on Th2 cells; however, its activity may promote a Th2-dependent reaction by modulating IL-4 production.

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