Multicolor Flow Cytometric Analyses of CD4(+) T Cell Responses to Mycobacterium tuberculosis-Related Latent Antigens.

Multicolor Flow Cytometric Analyses of CD4(+) T Cell Responses to Mycobacterium tuberculosis-Related Latent Antigens. Jpn J Infect Dis. 2013;66(3):207-15 Authors: Yamashita Y, Hoshino Y, Oka M, Matsumoto S, Ariga H, Nagai H, Makino M, Ariyoshi K, Tsunetsugu-Yokota Y Abstract Although IFN-γ release assays (IGRAs) provide increased specificity over tuberculin skin tests, the early and sensitive detection of reactivation of latently infected Mycobacterium tuberculosis is required to control tuberculosis (TB). Recently, a multicolor flow cytometry has been developed to study CD4(+) T cell cytokine responses (IFN-γ/IL-2/TNF-α) to purified protein derivatives (PPD) and M. tuberculosis-specific antigens (ESAT-6/CFP-10) and provided useful information regarding anti-TB immunity. However, the diagnostic relevancy remains uncertain. Here, we analyzed three additional CD4(+) T cell cytokine responses (IL-10/IL-13/IL-17) to latent mycobacterial antigens (α-crystallin, methylated heparin-binding hemagglutinin [HBHA], and mycobacterial DNA-binding protein 1 [MDP-1]) as well as PPD and ESAT-6/CFP-10 in 12 IGRA(+) TB cases and 8 healthy controls. No significant difference in IFN-γ response was observed between TB cases and controls, which was likely due to the high variation among the individuals. However, we found a significant increase over healthy controls in (i) the IL-2 response to HBHA in recovery stage TB cases, (ii) the number of M. tuberculosis-...
Source: Japanese Journal of Infectious Diseases - Category: Infectious Diseases Authors: Tags: Jpn J Infect Dis Source Type: research