Mycobacteria-specific cytokine responses as correlates of treatment response in active and latent tuberculosis.

J Infect

Department of Paediatrics, The University of Melbourne, Parkville, VIC, Australia; Murdoch Children's Research Institute, Royal Children's Hospital Melbourne, Parkville, VIC, Australia. Electronic address:

Published: August 2017

Objectives: A biomarker indicating successful tuberculosis (TB) therapy would assist in determining appropriate length of treatment. This study aimed to determine changes in mycobacteria-specific antigen-induced cytokine biomarkers in patients receiving therapy for latent or active TB, to identify biomarkers potentially correlating with treatment success.

Methods: A total of 33 adults with active TB and 36 with latent TB were followed longitudinally over therapy. Whole blood stimulation assays using mycobacteria-specific antigens (CFP-10, ESAT-6, PPD) were done on samples obtained at 0, 1, 3, 6 and 9 months. Cytokine responses (IFN-γ, IL-1ra, IL-2, IL-10, IL-13, IP-10, MIP-1β, and TNF-α) in supernatants were measured by Luminex xMAP immunoassay.

Results: In active TB cases, median IL-1ra (with CFP-10 and with PPD stimulation), IP-10 (CFP-10, ESAT-6), MIP-1β (ESAT-6, PPD), and TNF-α (ESAT-6) responses declined significantly over the course of therapy. In latent TB cases, median IL-1ra (CFP-10, ESAT-6, PPD), IL-2 (CFP-10, ESAT-6), and IP-10 (CFP-10, ESAT-6) responses declined significantly.

Conclusions: Mycobacteria-specific cytokine responses change significantly over the course of therapy, and their kinetics in active TB differ from those observed in latent TB. In particular, mycobacteria-specific IL-1ra responses are potential correlates of successful therapy in both active and latent TB.

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.jinf.2017.04.011DOI Listing

Publication Analysis

Top Keywords

cfp-10 esat-6
20
cytokine responses
12
active latent
12
esat-6 ppd
12
mycobacteria-specific cytokine
8
therapy latent
8
cases median
8
median il-1ra
8
il-1ra cfp-10
8
ip-10 cfp-10
8

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!