Published in:
01-07-2010
Reduced CD27 Expression on Antigen-Specific CD4+ T Cells Correlates with Persistent Active Tuberculosis
Authors:
Jing Jiang, Xianyuan Wang, Xinjing Wang, Zhihong Cao, Yanhua Liu, Mei Dong, Aihua Tong, Xiaoxing Cheng
Published in:
Journal of Clinical Immunology
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Issue 4/2010
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Abstract
Objective
CD27, a member of the tumor necrosis factor receptor family, has important role in generation of T cell immunity. In this study, association of CD27 expression on mycobacterial antigen-specific CD4+ T cells with pulmonary tuberculosis (TB) was investigated.
Methods
Mycobacterial antigen-specific CD4+ T cells were identified based on CD154 expression and CD27 expression on antigen-specific CD4 T cells was analyzed by flow cytometry.
Results
Compared with tuberculin-positive controls, patients with bacterial culture-positive pulmonary TB had significantly reduced CD27 expression on antigen-specific CD4 T cells. The persistent active TB patients had much lower percentages of CD27+ antigen-specific CD4 T cells than culture-positive new TB patients (P = 0.008) and healthy controls (P = 0.005). Logistic regression analysis on frequencies of CD27-expressing antigen-specific CD4 T cells and TB patients’ clinical characteristics indicated that low percentage of CD27+ antigen-specific CD4 T cells correlated significantly with persistent active tuberculosis (P = 0.002, odds ratio = 19.6).
Conclusion
It is concluded that frequency of CD27+ antigen-specific CD4 T cells could be used as an immunological marker for persistent active TB.