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- W1970889041 abstract "Sarcoidosis is a chronic systemic disorder of unknown etiology characterized by noncaseating epithelioid cell granulomatous lesions, around which an increasing number of CD4+ T cells infiltrate. These CD4+ T cells may release interferon-gamma (IFN-gamma) and interleukin-2 (IL-2). These cytokines are considered to play an important role in pathogenesis of sarcoidosis.We employed a modification of Jung's method using multicolor flow cytometry to assess the capability of single cells obtained from bronchoalveolar lavage (BAL) fluid to produce various cytokines. BAL CD4+ T cell production of IFN-gamma, IL-2 and IL-4 after phorbol ester and ionomycin stimulation were studied.The percentage of IFN-gamma- and IL-2-producing CD4+ T cells was significantly higher in patients with sarcoidosis compared to healthy volunteers [84.7 +/- 7.5 vs. 51.2 +/- 14.8% (p < 0.005), and 75.3 +/- 8.7 vs. 39.8 +/-11.0% (p < 0.001), respectively]. No significant difference in the percentage of IL-4-producing CD4+ T cells was noted (1.2 +/- 0.6 vs. 3.5 +/- 2.6%; not significant), whereas the absolute number of IL-4-producing CD4+ T cells was significantly higher in patients with sarcoidosis compared to healthy volunteers (563.6 +/- 330.2 vs. 50.9 +/- 66.9/ml; p < 0.005). In the IL-4-producing CD4+ T cells, about 80% of cells concomitantly produced IFN-gamma and more than 60% of cells also produced IL-2.We demonstrate that Th1-like-producing cells are predominant in the CD4+ as well as in the CD8+ T cell subset of patients with sarcoidosis. We for the first time demonstrated concomitant capabilities of BAL CD4+ T cells to produce Th1 and Th2 cytokines at the single cell level by multicolor flow cytometry." @default.
- W1970889041 created "2016-06-24" @default.
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- W1970889041 date "2002-01-01" @default.
- W1970889041 modified "2023-09-27" @default.
- W1970889041 title "Direct Demonstration of the Productive Capability of Cytokines at the Single Cell Level in Lung Sarcoidosis Using Multicolor Cytometry" @default.
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- W1970889041 doi "https://doi.org/10.1159/000056319" @default.
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