Operation of mitochondrial machinery in viral infection-induced immune responses

Jenn-Haung Lai, Shue-Fen Luo, Ling-Jun Ho, Jenn-Haung Lai, Shue-Fen Luo, Ling-Jun Ho

Abstract

Mitochondria have been recognized as ancient bacteria that contain evolutionary endosymbionts. Metabolic pathways and inflammatory signals interact within mitochondria in response to different stresses, such as viral infections. In this commentary, we address several interesting questions, including (1) how do mitochondrial machineries participate in immune responses; (2) how do mitochondria mediate antiviral immunity; (3) what mechanisms involved in mitochondrial machinery, including the downregulation of mitochondrial DNA (mtDNA), disturbances of mitochondrial dynamics, and the induction of mitophagy and regulation of apoptosis, have been adopted by viruses to evade antiviral immunity; (4) what mechanisms involve the regulation of mitochondrial machineries in antiviral therapeutics; and (5) what are the potential challenges and perspectives in developing mitochondria-targeting antiviral treatments? This commentary provides a comprehensive review of the roles and mechanisms of mitochondrial machineries in immunity, viral infections and related antiviral therapeutics.

Keywords: Immune; Mitochondria; Therapy; Virus.

Copyright © 2018 Elsevier Inc. All rights reserved.

Figures

Graphical abstract
Graphical abstract
Fig. 1
Fig. 1
Regulation of mitochondrial machineries by viruses to antagonize immune defense. Viral infection triggers antiviral immunity in host cells leading to the production of antiviral IFNs. Mitochondria play crucial roles in antiviral immunity. In order to evade antiviral immunity, viruses target interfering mitochondrial function or causing mitochondrial elimination (mitophagy). Several major strategies are developed by viruses to achieve the goals. These include at least the disturbance of mitochondrial dynamics, the induction of mitophagy, the suppression of mtDNA copy number or interfering mtDNA-mediated effects as well as the regulation of apoptotic processes. stands for inducing and stands for suppressing.

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