alexa Cytokine polarization in miliary and pleural tuberculosis.
Immunology

Immunology

Journal of Clinical & Cellular Immunology

Author(s): Sharma SK, Mitra DK, Balamurugan A, Pandey RM, Mehra NK

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Abstract Cytokines were measured in patients with pleural effusion and miliary tuberculosis (TB). Patients with pleural effusion had significantly higher interferon-gamma (IFN-gamma) levels (P < 0.001) in their pleural fluid as compared to that of peripheral blood of the same patients, thus exhibiting localization of predominantly Th1-type immunity in the pleural fluid. On the contrary, patients with miliary TB had higher IFN-gamma levels in the peripheral blood as compared to their bronchoalveolar lavage fluid. Moreover, the median IFN-gamma: IL-4 ratio in the peripheral blood of miliary TB patients was two-fold higher as compared to bronchoalveolar lavage fluid, suggesting that the cytokine profile at the disease site is skewed toward a Th2-like bias. Further, flow cytometry data revealed a significantly higher (P < 0.001) percentage of CD4+ pleural fluid lymphocytes expressing IFN-gamma, whereas in the miliary TB, a nine-fold higher percentage of lymphocytes in bronchoalveolar lavage fluid expressed IL-4 in comparison with their peripheral CD4 T cells. Our data indicate, respectively, a Th1-like and Th2-like response in tuberculous pleural effusion and miliary TB, suggesting that these clinical forms of extrapulmonary tuberculosis probably reflect the extreme ends of a Th1-Th2 spectrum of the disease.
This article was published in J Clin Immunol and referenced in Journal of Clinical & Cellular Immunology

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