Journal article

The impact of anti-tuberculous antibiotics and corticosteroids on cytokine production in QuantiFERON-TB Gold In Tube assays

Vanessa Clifford, Christel Zufferey, Susie Germano, Norbert Ryan, David Leslie, Alan Street, Justin Denholm, Marc Tebruegge, Nigel Curtis



INTRODUCTION: The ability to monitor and confirm adequate treatment of latent TB infection (LTBI) would be a major advance. The potential immunomodulatory effects of anti-tuberculous drugs and steroids need to be considered in assessing the utility of cytokine-based assays for this purpose. METHODS: We determined whether anti-tuberculous antibiotics or dexamethasone affect the production of IFN-γ and other potential cytokine biomarkers (TNF-α, IL-1ra, IL-2, IL-10, IL-13, IP-10, MIP-1β) in the QuantiFERON-TB Gold In-Tube (QFT-IT) assay. Blood from ten adults with LTBI was added to one standard set of QFT-IT tubes and five further sets containing therapeutic concentrations of either isoniazid,..

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