Mitochondrial dysfunction-induced PANoptosis: Mechanisms, triggers, and disease implications.

In recent years, PANoptosis, as a novel form of cell death that integrates multiple cell death pathways, has progressively emerged as a cutting-edge research field in the study of cell death and immune regulation. PANoptosis, a recently proposed form of inflammatory programmed cell death, integrates features of pyroptosis, apoptosis, and necroptosis, while emphasizing their interplay. It is mediated by the PANoptosome and plays a pivotal role in infections, inflammation, tumors, and degenerative diseases. Recent studies have demonstrated that ROS serve as critical signaling molecules for PANoptosome assembly. Given that mitochondria constitute the primary intracellular source of ROS, this establishes a crucial link between mitochondrial and PANoptosis activation. Mitochondria sustain energy production, calcium homeostasis, and signaling but also contribute to immune responses and cell death. Oxidative stress, obesity, and environmental pollutants can induce mitochondrial dysfunction, manifested through impaired mitochondrial dynamics, which subsequently leads to excessive ROS production and mtDNA leakage. These pathological changes ultimately trigger PANoptosis activation. This review systematically summarizes how mitochondrial dysfunction triggers PANoptosis through mechanisms such as ROS accumulation, aberrant mitochondrial dynamics, and mtDNA leakage. Furthermore, it explores the implications of this process in traumatic brain injury, inflammatory diseases, ischemic disorders, and diseases induced by environmental toxins (e.g., microplastics and heavy metals). Understanding the interplay between mitochondria and PANoptosis may provide critical insights into the pathogenesis of inflammation-related diseases and offer novel mitochondria-targeted therapeutic strategies.