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J Lab Clin Med. 2005 Feb;145(2):88-93.

Evaluation of interferon-gamma, interferon-gamma-inducing cytokines, and interferon-gamma-inducible chemokines in tuberculous pleural effusions.

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1
Division of Respiratory Medicine, Department of Medicine, Nagoya University Graduate School of Medicine, Nagoya, Japan.

Abstract

Tuberculous and malignant pleural effusions are representative of lymphocytic pleural effusions. In tuberculous pleurisy, especially, T-helper type 1 (Th1) cytokines are dominant, containing, for example, high concentrations of interferon (IFN)-gamma. We focused on cytokines that induce expression of IFN-gamma and Th1 cell-specific CXC chemokines induced by IFN-gamma. We also evaluated the diagnostic utility of these markers in tuberculous pleural effusions. Forty-three patients with pleural effusions (11 with tuberculous pleuritis, 32 with malignant pleuritis) were studied. We measured the pleural concentrations of IFN-gamma, IFN-gamma-inducing cytokines (interleukin IL-12 and IL-18), and IFN-gamma-inducible chemokines (interferon-gamma-inducible protein of 10-kD [IP-10], monokine induced by interferon-gamma [Mig], and interferon-inducible T-cell alpha chemoattractant [I-TAC]). Our results demonstrate that the concentrations of IFN-gamma, IFN-gamma-inducing cytokines, and IFN-gamma-inducible chemokines were all higher in tuberculous pleural effusions than in malignant pleural effusions. Also, IFN-gamma was significantly correlated with IL-12, Mig, and I-TAC. Moreover, receiver-operator-characteristic (ROC) analysis demonstrated that IFN-gamma produced a greater area under the ROC curve than any other factor. We conclude that the concentrations of IFN-gamma, cytokines that induce expression of IFN-gamma, and chemokines induced by IFN-gamma in tuberculous pleural effusion were all increased. The Th1 chemokines we examined, especially IP-10, are comparable to IFN-gamma as diagnostic markers of tuberculous and malignant pleural effusions, although IFN-gamma is the most valuable.

PMID:
15746651
DOI:
10.1016/j.lab.2004.11.013
[Indexed for MEDLINE]
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