Finally, we showed that the serum levels of IL-1α, IL-6, C-reactive protein (CRP), IL-23, and IP-10 were significantly reduced in <i>M. tuberculosis</i>/HIV-coinfected individuals with PTB compared to those in HIV-negative individuals with PTB (<i>P < </i>0.05), suggesting that HIV infection significantly suppresses <i>M. tuberculosis</i>-induced systemic proinflammatory cytokine responses.
Finally, when Th1 cytokines (IFN-γ, TNF-α and IL-2), Th2 cytokines (IL-6 and IL-10) and T cells were included in the logistic regression fit for PTB outcome, the predictive power of discriminating between those who were AFB smear negative in the diagnosis of PTB was good with cross validated area under the curve (AUC) being 0.87 (95% CI: 0.78, 0.96).
To examine the association of proinflammatory cytokines with pulmonary TB (PTB), we examined the plasma levels of type 1 (interferon [IFN]γ and tumor necrosis factor [TNF]α), type 17 (interleukin [IL]-17A and IL-17F), and other proinflammatory (IL-6, IL-12, and IL-1β) cytokines in individuals with PTB, latent TB (LTB), or healthy controls (HC).
In this study, we have investigated the relationship between <i>ILB</i>, <i>IL6,</i> and <i>TNFα</i> polymorphisms and a predisposition to <i>Mycobacterium tuberculosis</i> (MTB) infection and PTB.
We also performed the analyses by sample types in IL-6-174 C/G polymorphism, and significant decreased TB risk was observed in pulmonary tuberculosis group (C allele vs. G allele: OR=0.69, 95% CI=0.52-0.93; CG vs. GG: OR=0.69, 95% CI=0.52-0.91; CC+CG vs. GG: OR=0.71, 95% CI=0.55-0.93), and pulmonary tuberculosis plus extra-pulmonary tuberculosis mixed group (CC vs. GG: OR=0.44, 95% CI=0.22-0.88; CC vs. CG+GG: OR=0.48, 95% CI=0.25-0.94).
We identified a genetic polymorphism in the IL-6 promoter that regulates cytokine production and host resistance to pulmonary tuberculosis in Chinese populations.
The objective of the current study was to analyze IFN-γ gene combinations with other IFN-γ regulating cytokine genes (IL-10, TNF -α, IL-6) to see the effect of gene- combinations on disease severity outcome in pulmonary tuberculosis.
Increased TNF-alpha, IL-1 beta and IL-6 levels in the bronchoalveolar lavage fluid with the upregulation of their mRNA in macrophages lavaged from patients with active pulmonary tuberculosis.