This review focuses on the PINK1-Parkin pathway, a well-established mechanism of canonical mitophagy, and evaluates its role in sepsis and sepsis-induced multiorgan dysfunction. The pathway is recognized for removing damaged mitochondria and maintaining mitochondrial quality control. The authors emphasize that while PINK1-Parkin–mediated mitophagy participates in multiple biological and pathophysiological processes—such as pathogen response, inflammasome regulation, oxidative stress modulation, and inflammatory signaling—its precise orchestration during mitochondrial injury in sepsis is not fully elucidated and remains debated.
The review identifies oxidative stress as one of four central mechanistic pathways that interact with mitophagy during sepsis. Mitochondrial damage in sepsis increases reactive oxygen species and other oxidative signals that both trigger and are modulated by mitophagy. The authors propose that mitophagy via the PINK1-Parkin axis can influence the balance between harmful oxidative damage and cellular recovery, but the net impact in sepsis settings is complex and context-dependent. Specific molecular details and quantitative effects were not provided in the abstract and require consultation of the full text or primary studies.
Another mechanism discussed is the cGAS-STING innate immune axis. The review highlights interactions between mitochondrial damage, release of mitochondrial DNA or other damage-associated molecular patterns, activation of the cGAS-STING pathway, and the regulatory role that PINK1-Parkin–dependent mitophagy may exert on this axis. The PINK1-Parkin pathway has been implicated in mitigating STING-induced inflammation in prior literature, linking mitochondrial clearance to modulation of cytosolic DNA sensing and downstream inflammatory signaling. The abstract notes these interactions as contributors to sepsis pathogenesis but does not enumerate experimental details.
The authors place NF-κB signaling and inflammasome activation alongside oxidative stress and cGAS-STING as core interacting pathways with mitophagy in sepsis. Mitophagy may influence inflammasome activation by removing damaged mitochondria that release activators of inflammasomes, and conversely, inflammatory signaling pathways can regulate components of the mitophagy machinery. The review underscores a bidirectional relationship in which PINK1-Parkin activity can affect inflammatory cascades relevant to sepsis, while inflammatory mediators can modify mitophagy. The abstract does not supply detailed mechanistic steps or specific experimental outcomes.
A stated objective of the review is to explore potential candidate agents that regulate the PINK1-Parkin pathway. The authors classify therapeutic mechanisms into categories rather than naming specific approved drugs in the abstract. Categories reported include PINK1 activators, Parkin recruiters, deubiquitinase inhibitors, and upstream pathway modulators. The rationale is that manipulating mitophagy through these approaches could modulate inflammation, mitochondrial quality, and downstream organ dysfunction in sepsis. The abstract indicates potential therapeutic benefits but does not provide specific agents, dosing, or clinical trial data; those details were not reported in the abstract and would require the full article or cited studies for confirmation.
The review notes that therapeutic regulation of mitophagy may confer protective effects against multiple organ injuries associated with sepsis. Organs and syndromes explicitly mentioned in the abstract include septic encephalopathy, cardiac dysfunction, acute lung injury, and acute kidney injury. The authors suggest that appropriately targeted activation or modulation of the PINK1-Parkin pathway could limit organ damage in sepsis, but they also acknowledge uncertainty and the need for further mechanistic and translational research to define net benefit versus potential harm.
The abstract highlights that the role of mitophagy in sepsis is controversial and incompletely defined. Key gaps identified include the detailed molecular orchestration of mitophagy during sepsis-induced mitochondrial damage and the contextual determinants that make mitophagy protective in some settings and potentially deleterious in others. The review synthesizes existing literature and proposes interacting pathways and therapeutic categories, but specific mechanistic proofs, quantitative outcomes, and named therapeutic candidates are not reported in the abstract. The authors implicitly call for further mechanistic studies and translational work to clarify how modulating the PINK1-Parkin pathway might be harnessed safely in sepsis management.
Note: This summary is based on the article abstract. The abstract identifies four interacting mechanisms—oxidative stress, cGAS-STING, NF-κB, and inflammasome activation—and therapeutic categories targeting PINK1-Parkin mitophagy, and lists potential organ-protective effects. Detailed experimental data, specific agent names, or clinical trial evidence were not reported in the abstract and were not inferred here.