Effect of HIV on the frequency and number of Mycobacterium tuberculosis-specific CD4+ T cells in blood and the airways in latent tuberculosis infection
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Accepted version
Published version
Author(s)
Type
Journal Article
Abstract
HIV-1 infection substantially increases the risk of developing tuberculosis (TB). There is extensive depletion of Mycobacterium tuberculosis (M.tuberculosis)-specific CD4+ T cells in blood in early HIV infection, but little is known about responses in the lungs at this stage. Given that mucosal organs are a principal target for HIV-mediated CD4 destruction, we investigated M.tuberculosis-specific responses in bronchoalveolar lavage (BAL), in persons with latent TB infection and untreated HIV-1 co-infection with preserved CD4 counts. M.tuberculosis-specific CD4+ cytokine responses (IFN-, TNF- and IL-2) were discordant in frequency and function between BAL and blood. Responses in BAL were 15-fold lower in HIV-infected compared to uninfected persons (p=0.048), whilst blood responses were 2-fold lower (p=0.006). However, an increase in T cells in the airways in HIV-infected persons resulted in the overall number of M.tuberculosis-specific CD4+ cells in BAL being similar. Our study highlights the important insights gained from studying TB immunity at the site of disease during HIV infection.
Date Issued
2017-10-05
Date Acceptance
2017-09-26
Citation
Journal of Infectious Diseases, 2017, 216 (12), pp.1550-1560
ISSN
0022-1899
Publisher
Oxford University Press (OUP)
Start Page
1550
End Page
1560
Journal / Book Title
Journal of Infectious Diseases
Volume
216
Issue
12
Copyright Statement
© The Author 2017. Published by Oxford University Press for the Infectious Diseases Society of America.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
License URL
Sponsor
Wellcome Trust
Grant Number
104803/Z/14/ZR
Subjects
11 Medical And Health Sciences
06 Biological Sciences
Microbiology
Publication Status
Published