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PubMed · 17002713

Decrease of cytotoxic T cells in allergic asthma correlates with total serum immunglobulin E.

K Bratke·F Haupt·M Kuepper·B Bade·S Faehndrich·W Luttmann·J C Virchow
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Abstract

BACKGROUND: Allergic asthma has been linked to an increase in T-helper type 2-like cytokines and T cells, but there is growing evidence for a role of lymphocyte-mediated cytotoxic mechanisms in the pathogenesis of asthma. Therefore, we investigated the cytotoxic potential of different lymphocyte subpopulations in patients with allergic asthma. METHODS: Granzyme A, B, K, and perforin expression in peripheral blood lymphocytes was analyzed using flow cytometry. Soluble granzymes were measured in serum using specific enzyme-linked immunosorbent assays. RESULTS: Asthmatics had significantly decreased percentages of granzyme and perforin-positive CD4 T cells compared with non-atopic controls. In patients with asthma, the granzyme B and perforin-positive subset of CD8(+) T cells and natural killer T cells, which represent more differentiated cell populations, were significantly reduced, while this was not observed in the less differentiated granzyme K(+) subsets. In addition, the serum concentrations of granzyme B were significantly reduced in patients with asthma, while granzyme K concentrations were not different. Interestingly, there was a negative correlation between granzyme A, B and perforin expression in T cell subsets as well as serum granzyme B concentrations and total serum immunglobulin E. In CD3-negative natural killer cells, no differences in granzyme or perforin expression between patients with asthma and controls were detected. CONCLUSION: In allergic asthma, cytotoxic T lymphocyte subsets of a more differentiated phenotype are significantly decreased and this is correlated to serum immunglobulin E levels.

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AdultAsthmaFemaleGranzymesHumansImmunoglobulin EInterleukin-4MaleMembrane GlycoproteinsPerforinPore Forming Cytotoxic ProteinsRespiratory HypersensitivityT-Lymphocyte SubsetsT-Lymphocytes, CytotoxicJournal ArticleResearch Support, Non-U.S. Gov't

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K Bratke, F Haupt, M Kuepper, B Bade, S Faehndrich, W Luttmann, J C Virchow. 2006. Decrease of cytotoxic T cells in allergic asthma correlates with total serum immunglobulin E.. https://doi.org/10.1111/j.1398-9995.2006.01192.x

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