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NK cell phenotypic profile during active TB in people living with HIV-evolution during TB treatment and implications for bacterial clearance and disease severity.

Authors :
Maseko TG
Rambaran S
Ngubane S
Lewis L
Ngcapu S
Hassan-Moosa R
Archary D
Perumal R
Padayatchi N
Naidoo K
Sivro A
Source :
Scientific reports [Sci Rep] 2023 Jul 20; Vol. 13 (1), pp. 11726. Date of Electronic Publication: 2023 Jul 20.
Publication Year :
2023

Abstract

Natural killer (NK) cells, key effector cells of the innate immune system, play an important role in the clearance and control of Mycobacterium tuberculosis and HIV infections. Here, we utilized peripheral blood specimens from the Improving Retreatment Success CAPRISA 011 study to characterize NK cell phenotypes during active TB in individuals with or without HIV co-infection. We further assessed the effects of TB treatment on NK cell phenotype, and characterized the effects of NK cell phenotypes during active TB on mycobacterial clearance and TB disease severity measured by the presence of lung cavitation. TB/HIV co-infection led to the expansion of functionally impaired CD56 <superscript>neg</superscript> NK cell subset. TB treatment completion resulted in restoration of total NK cells, NK cell subset redistribution and downregulation of several NK cell activating and inhibitory receptors. Higher percentage of peripheral CD56 <superscript>bright</superscript> cells was associated with longer time to culture conversion, while higher expression of NKp46 on CD56 <superscript>dim</superscript> NK cells was associated with lower odds of lung cavitation in the overall cohort and the TB/HIV co-infected participants. Together these results provide a detailed description of peripheral NK cells in TB and TB/HIV co-infection and yield insights into their role in TB disease pathology.<br /> (© 2023. The Author(s).)

Details

Language :
English
ISSN :
2045-2322
Volume :
13
Issue :
1
Database :
MEDLINE
Journal :
Scientific reports
Publication Type :
Academic Journal
Accession number :
37474556
Full Text :
https://doi.org/10.1038/s41598-023-38766-7