ReviewFrontiers in immunology2026
The role of mitochondrial proteases in inflammation and immunity.
Review in Frontiers in immunology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The global rise in chronic inflammatory and autoimmune disorders has intensified research to understand cellular stress response pathways that drive immune dysregulation. Mitochondria have emerged not only as central hubs of cellular metabolism but also as active modulators of immunity and inflammation. Mitochondrial proteases are essential regulators of mitochondrial protein quality control, dynamics, and stress responses. By selectively degrading misfolded or damaged proteins, they maintain mitochondrial function and bioenergetic capacity. Beyond housekeeping roles, mitochondrial proteases also influence immune signaling by modulating mitochondrial stress pathways, reactive oxygen species production, and the release of mitochondrial-derived danger signals. Dysregulation of these proteases has been linked to chronic inflammation and contributes to the pathogenesis of inflammatory diseases. This review summarizes current knowledge on the role of mitochondrial proteases CLPXP, LONP1, i-AAA, m-AAA, as well as processing peptidase OMA1, in immune cells and inflammatory pathologies. We explore the molecular mechanisms by which these mitochondrial proteases regulate immune signaling, integrating the results from immune cells as well as other non-immune cell types, including those involved in cancer, neurodegeneration, renal injury, and other inflammatory pathologies. We explore mitochondrial proteases function as context-dependent regulators of immunometabolic signaling, with effects shaped by cell type, metabolic state, and stress conditions. Finally, we discuss emerging small molecules and drugs targeting mitochondrial proteases to highlight their potential therapeutic role in modulating inflammation. By situating mitochondrial proteases at the crossroads of immunometabolism and therapeutic intervention, this review underscores their untapped potential in the development of innovative anti-inflammatory strategies.
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