T cell responses to mycobacterial catalase-peroxidase profile a pathogenic antigen in systemic sarcoidosis.
T cell responses to mycobacterial catalase-peroxidase profile a pathogenic antigen in systemic sarcoidosis.
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DOI:
10.4049/jimmunol.181.12.8784
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发表时间:
2008-12-15
期刊:
影响因子:
--
通讯作者:
Moller DR
中科院分区:
文献类型:
--
作者:
Chen ES;Wahlström J;Song Z;Willett MH;Wikén M;Yung RC;West EE;McDyer JF;Zhang Y;Eklund A;Grunewald J;Moller DR
Sarcoidosis is a systemic granulomatous disease associated with local epithelioid granulomas, CD4+ T cells, and Th1 cytokines. The tissue Ags that drive this granulomatous inflammation are uncertain. In this study, we used IFN-γ-ELISPOT assays and flow cytometry to assess lung and blood T cell responses to the candidate pathogenic Ag, Mycobacterium tuberculosis catalase-perox-idase (mKatG) in patients with sarcoidosis from two centers. Despite differences in patient phenotypic, genetic, and prognostic characteristics, we report that T cell responses to mKatG were remarkably similar in these cohorts, with higher frequencies of mKatG-reactive, IFN-γ-expressing T cells in the blood of sarcoidosis patients compared with nontuberculosis sensitized healthy controls, and (in a subset) in greater numbers than T cells reactive to purified protein derivative. In sarcoidosis, mKatG-reactive CD4+ Th1 cells preferentially accumulated in the lung, indicating a compartmentalized response. Patients with or without Löfgren syndrome had similar frequencies of mKatG specific IFN-γ-expressing blood T cells. Circulating mKatG-reactive T cells were found in chronic active sarcoidosis but not in patients with inactive disease. Together, these results demonstrate that T cell responses to mKatG in sarcoidosis fit a profile expected for a pathogenic Ag, supporting an immunotherapeutic approach to this disease.
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影响因子:
10
作者:
EKLUND, A;BLASCHKE, E
通讯作者:
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影响因子:
24.3
作者:
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作者:
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影响因子:
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作者:
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通讯作者:
Drake, Wonder Puryear
DOI:
10.1164/rccm.200608-1197oc
发表时间:
2007-01-01
影响因子:
24.7
作者:
Grunewald, Johan;Eklund, Anders
通讯作者:
Eklund, Anders