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Osei-Wusu S, Tetteh JKA, Musah AB, Ntiamoah DO, Arthur N, Adjei A, Arbues A, Ofori EA, Mensah KA, Galevo SEA, Frempong AF, Asare P, Asante-Poku A, Otchere ID, Kusi KA, Lenz TL, Gagneux S, Portevin D, Yeboah-Manu D. Macrophage susceptibility to infection by Ghanaian Mycobacterium tuberculosis complex lineages 4 and 5 varies with self-reported ethnicity. Front Cell Infect Microbiol 2023; 13:1163993. [PMID: 37645380 PMCID: PMC10461633 DOI: 10.3389/fcimb.2023.1163993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Accepted: 07/24/2023] [Indexed: 08/31/2023] Open
Abstract
Background The epidemiology of Mycobacterium tuberculosis complex (MTBC) lineage 5 (L5) infections in Ghana revealed a significantly increased prevalence in Ewes compared to other self-reported ethnic groups. In that context, we sought to investigate the early phase of tuberculosis (TB) infection using ex vivo infection of macrophages derived from the blood of Ewe and Akan ethnic group volunteers with MTBC L4 and L5 strains. Methods The study participants consisted of 16 controls, among which self-reported Akan and Ewe ethnicity was equally represented, as well as 20 cured TB cases consisting of 11 Akans and 9 Ewes. Peripheral blood mononuclear cells were isolated from both healthy controls and cured TB cases. CD14+ monocytes were isolated and differentiated into monocyte-derived macrophages (MDMs) before infection with L4 or L5 endemic strains. The bacterial load was assessed after 2 hours (uptake) as well as 3 and 7 days post-infection. Results We observed a higher capacity of MDMs from Ewes to phagocytose L4 strains (p < 0.001), translating into a higher bacillary load on day 7 (p < 0.001) compared to L5, despite the higher replication rate of L5 in Ewe MDMs (fold change: 1.4 vs. 1.2, p = 0.03) among the controls. On the contrary, within macrophages from Akans, we observed a significantly higher phagocytic uptake of L5 (p < 0.001) compared to L4, also translating into a higher load on day 7 (p = 0.04). However, the replication rate of L4 in Akan MDMs was higher than that of L5 (fold change: L4 = 1.2, L4 = 1.1, p = 0.04). Although there was no significant difference in the uptake of L4 and L5 among cured TB cases, there was a higher bacterial load of both L4 (p = 0.02) and L5 (p = 0.02) on day 7 in Ewe MDMs. Conclusion Our results suggest that host ethnicity (driven by host genetic diversity), MTBC genetic diversity, and individual TB infection history are all acting together to modulate the outcome of macrophage infections by MTBC.
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Affiliation(s)
- Stephen Osei-Wusu
- Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Ghana
- West African Centre for Cell Biology of Infectious Pathogens (WACCBIP), University of Ghana, Legon, Ghana
| | - John K. A. Tetteh
- Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Ghana
| | - Abdul Basit Musah
- Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Ghana
| | | | - Nelly Arthur
- Department of Chest Diseases, Korle-Bu Teaching Hospital, Accra, Ghana
| | - Abraham Adjei
- Department of Chest Diseases, Korle-Bu Teaching Hospital, Accra, Ghana
| | - Ainhoa Arbues
- Swiss Tropical and Public Health Institute, Allschwil, Switzerland
- University of Basel, Basel, Switzerland
| | - Ebenezer Addo Ofori
- Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Ghana
| | - Kwadwo Akyea Mensah
- Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Ghana
| | | | - Abena Frema Frempong
- Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Ghana
| | - Prince Asare
- Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Ghana
| | - Adwoa Asante-Poku
- Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Ghana
| | - Isaac Darko Otchere
- Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Ghana
| | - Kwadwo Asamoah Kusi
- Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Ghana
| | - Tobias L. Lenz
- Research Group for Evolutionary Immunogenomics, Department of Biology, University of Hamburg, Hamburg, Germany
| | - Sebastien Gagneux
- Swiss Tropical and Public Health Institute, Allschwil, Switzerland
- University of Basel, Basel, Switzerland
| | - Damien Portevin
- Swiss Tropical and Public Health Institute, Allschwil, Switzerland
- University of Basel, Basel, Switzerland
| | - Dorothy Yeboah-Manu
- Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Ghana
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