Mitoxyperiosis: A Novel Mitochondria-Driven Cell Death Mechanism in Immunometabolic Stress

초록

Wang et al. recently proposed mitoxyperiosis as a previously uncharacterized, mitochondria-dependent form of lytic cell death triggered by immunometabolic stress. Unlike apoptosis, pyroptosis, necroptosis, or ferroptosis, mitoxyperiosis is driven by sustained oxidative stress and prolonged mitochondria-plasma membrane contact, culminating in localized oxidative membrane damage and non-caspase-dependent rupture, termed mitoxyperilysis. Central to this mechanism is the activation of mechanistic target of rapamycin complex 2 (mTORC2), which suppresses actin cytoskeletal remodeling and inhibits lamellipodia formation, thereby retaining mitochondria at the cell periphery. Remarkably, mTORC2 inhibition or the restoration of cytoskeletal dynamics prevents membrane rupture despite persistent oxidative stress. This review synthesizes mechanistic insights and experimental evidence underlying mitoxyperiosis and examines its implications for tumor biology and inflammatory disease. We further discuss how this pathway may expand current understanding of spatial control in regulated cell death and may provide therapeutic opportunities targeting mitochondrial positioning and mTORC2 signaling in immunometabolic disorders.

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