Effect of mycobacterial proteins that target mitochondria on the alveolar macrophages activation during Mycobacterium tuberculosis infection

Purpose of the study: During the early and progressive (late) stages of murine experimental pulmonary tuberculosis, the differential activation of macrophages contributes to disease development by controlling bacterial growth and immune regulation. Mycobacterial proteins P27 and PE_PGRS33 can target...

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Published in:Experimental lung research 2022-11, Vol.48 (9-10), p.251-265
Main Authors: Paredes-González, Iris Selene, Aparicio-Trejo, Omar Emiliano, Ramos-Espinosa, Octavio, López-Torres, Manuel Othoniel, Maya-Hoyos, Milena, Mendoza-Trujillo, Monserrat, Barrera-Rosales, Alejandra, Mata-Espinosa, Dulce, León-Contreras, Juan Carlos, Pedraza-Chaverri, José, Espitia, Clara, Hernández-Pando, Rogelio
Format: Article
Language:English
Subjects:
Animals
Macrophage Activation
Macrophages, Alveolar - metabolism
Mice
Mitochondria
mycobacterial protein
Mycobacterium tuberculosis - genetics
Mycobacterium tuberculosis - metabolism
Tuberculosis
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Summary:Purpose of the study: During the early and progressive (late) stages of murine experimental pulmonary tuberculosis, the differential activation of macrophages contributes to disease development by controlling bacterial growth and immune regulation. Mycobacterial proteins P27 and PE_PGRS33 can target the mitochondria of macrophages. This study aims to evaluate the effect of both proteins on macrophage activation during mycobacterial infection. Materials and methods: We assess both proteins for mitochondrial oxygen consumption, and morphological changes, as well as bactericide activity, production of metabolites, cytokines, and activation markers in infected MQs. The cell line MH-S was used for all the experiments. Results: We show that P27 and PE_PGRS33 proteins modified mitochondrial dynamics, oxygen consumption, bacilli growth, cytokine production, and some genes that contribute to macrophage alternative activation and mycobacterial intracellular survival. Conclusions: Our findings showed that these bacterial proteins partially contribute to promoting M2 differentiation by altering mitochondrial metabolic activity.
ISSN:0190-2148
1521-0499
DOI:10.1080/01902148.2022.2120649