Fiorenza G, Rateni L, Farroni MA, Bogué C, Dlugovitzky DG. TNF-alpha, TGF-beta and NO relationship in sera from tuberculosis (TB) patients of different severity.
Immunol Lett 2005;
98:45-8. [PMID:
15790507 DOI:
10.1016/j.imlet.2004.09.008]
[Citation(s) in RCA: 39] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2004] [Revised: 07/28/2004] [Accepted: 09/16/2004] [Indexed: 11/30/2022]
Abstract
Tuberculosis (TB) is the main cause of death by infection diseases worldwide. Considering that NO, TNF-alpha and TGF-beta participate a great deal in TB immunopathogenesis, we wished to analyse whether these mediators showed some relationship with the degree of pulmonary affectation. The sample comprised 29 TB (HIV-), inpatients with mild-moderate (n = 10) or advanced (n = 19) newly-diagnosed disease, together with 12 healthy controls HCo. Serum nitrite was assessed by reducing nitrate to nitrite, and further measured by the Griess reaction. Levels of TNF-alpha and TGF-beta were determined by ELISA (R&D Systems). Serum levels of TNF-alpha were significantly higher in the advanced TB cases if compared with HCo, (p < 0.05 ) and from values of Mild-Moderate TB patients (p < 0.05). Serum levels of TGF-beta from advanced TB patients have increased values if compared with Hco (p < 0.005) and Mild-Moderate patients (p < 0.05). These values were also significantly different from Mild-Moderate cases + HCo (p = 0.01) Advanced TB patients had significantly reduced nitrite levels compared with those of Mild-Moderate patients and HCo (p < 0.002). Taken as a whole NO-derived metabolites in TB patients (M-M and Advanced cases) remained lower than values in HCo (p = 0.005) A negative correlation was found when comparing the two cytokines with nitrites(r = -0.44 ).TGF-beta and TNF-alpha were positively correlated (r = 0.44, p < 0.01), 0.44, p < 0.01. In synthesis, the inverse correlation found between both cytokines concentrations and NO levels in TB patients may be viewed as a consequence of a more predominant TGF-beta effect.
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