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

• Published in: Experimental lung research Vol. 48; no. 9-10; pp. 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: Journal Article
• Language: English
• Published: England Taylor & Francis 26.11.2022
• Subjects: Animals; Macrophage Activation; Macrophages, Alveolar - metabolism; Mice; Mitochondria; mycobacterial protein; Mycobacterium tuberculosis - genetics; Mycobacterium tuberculosis - metabolism; Tuberculosis; Macrophage activation; mycobacterial protein; mitochondria; tuberculosis
• ISSN: 0190-2148; 1521-0499
• DOI: 10.1080/01902148.2022.2120649

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.