To eat or not to eat mitochondria? How do host cells cope with mitophagy upon bacterial infection?

PLoS Pathog. 2023 Jul 6;19(7):e1011471. doi: 10.1371/journal.ppat.1011471. eCollection 2023 Jul.

Abstract

Mitochondria fulfil a plethora of cellular functions ranging from energy production to regulation of inflammation and cell death control. The fundamental role of mitochondria makes them a target of choice for invading pathogens, with either an intracellular or extracellular lifestyle. Indeed, the modulation of mitochondrial functions by several bacterial pathogens has been shown to be beneficial for bacterial survival inside their host. However, so far, relatively little is known about the importance of mitochondrial recycling and degradation pathways through mitophagy in the outcome (success or failure) of bacterial infection. On the one hand, mitophagy could be considered as a defensive response triggered by the host upon infection to maintain mitochondrial homeostasis. However, on the other hand, the pathogen itself may initiate the host mitophagy to escape from mitochondrial-mediated inflammation or antibacterial oxidative stress. In this review, we will discuss the diversity of various mechanisms of mitophagy in a general context, as well as what is currently known about the different bacterial pathogens that have developed strategies to manipulate the host mitophagy.

Publication types

  • Review

MeSH terms

  • Bacterial Infections* / metabolism
  • Humans
  • Inflammation / metabolism
  • Mitochondria / metabolism
  • Mitophagy* / physiology

Grants and funding

JV is a Research Fellow (2018-2022) of the F.R.S-FNRS (Fonds de la Recherche Scientifique, Belgium). This work was also supported by two “Crédit de Recherche” grants (CDR 2019-2021: “MITOCHOBRU” grant J.0003.20-AID 35252856 and CDR 2022-2023: “Brucella and BNIP3L-mediated mitophagy” grant J.0003.22 AID 40007965) obtained by TA from the F.R.S-FNRS. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.