Bacterial diversity dominates variable macrophage responses of tuberculosis patients in Tanzania.
Détails
Télécharger: 38653771.pdf (2305.10 [Ko])
Etat: Public
Version: Final published version
Licence: CC BY 4.0
Etat: Public
Version: Final published version
Licence: CC BY 4.0
ID Serval
serval:BIB_288A15B47D51
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Bacterial diversity dominates variable macrophage responses of tuberculosis patients in Tanzania.
Périodique
Scientific reports
ISSN
2045-2322 (Electronic)
ISSN-L
2045-2322
Statut éditorial
Publié
Date de publication
23/04/2024
Peer-reviewed
Oui
Volume
14
Numéro
1
Pages
9287
Langue
anglais
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: epublish
Publication Status: epublish
Résumé
The Mycobacterium tuberculosis complex (MTBC) comprises nine human-adapted lineages that differ in their geographical distribution. Local adaptation of specific MTBC genotypes to the respective human host population has been invoked in this context. We aimed to assess if bacterial genetics governs MTBC pathogenesis or if local co-adaptation translates into differential susceptibility of human macrophages to infection by different MTBC genotypes. We generated macrophages from cryopreserved blood mononuclear cells of Tanzanian tuberculosis patients, from which the infecting MTBC strains had previously been phylogenetically characterized. We infected these macrophages ex vivo with a phylogenetically similar MTBC strain ("matched infection") or with strains representative of other MTBC lineages ("mismatched infection"). We found that L1 infections resulted in a significantly lower bacterial burden and that the intra-cellular replication rate of L2 strains was significantly higher compared the other MTBC lineages, irrespective of the MTBC lineage originally infecting the patients. Moreover, L4-infected macrophages released significantly greater amounts of TNF-α, IL-6, IL-10, MIP-1β, and IL-1β compared to macrophages infected by all other strains. While our results revealed no measurable effect of local adaptation, they further highlight the strong impact of MTBC phylogenetic diversity on the variable outcome of the host-pathogen interaction in human tuberculosis.
Mots-clé
Humans, Tanzania, Macrophages/microbiology, Macrophages/immunology, Macrophages/metabolism, Mycobacterium tuberculosis/genetics, Mycobacterium tuberculosis/immunology, Tuberculosis/microbiology, Tuberculosis/immunology, Phylogeny, Cytokines/metabolism, Host-Pathogen Interactions/immunology, Host-Pathogen Interactions/genetics, Adult, Male, Female, Genotype, Cytokine, Infection, Macrophage, Mycobacterium tuberculosis complex, Patient
Pubmed
Web of science
Open Access
Oui
Création de la notice
29/04/2024 8:18
Dernière modification de la notice
13/07/2024 6:09