Longevity & AgingScientists Discover Mitoxyperilysis: A New Inflammatory Cell Death Pathway
A Cell 2025 study from St. Jude Children's Research Hospital identifies a completely new form of inflammatory cell death called mitoxyperilysis. Triggered by the simultaneous activation of innate immune signaling and metabolic disruption (such as nutrient starvation), this process is independent of all previously known cell death pathways—including pyroptosis, necroptosis, ferroptosis, apoptosis, and PANoptosis. Instead, mitochondria undergoing oxidative stress make prolonged contact with the plasma membrane, causing localized oxidative damage and eventual membrane rupture. The mTORC2 pathway regulates this process, and mTOR inhibition restores normal cytoskeletal activity to pull mitochondria away from the membrane. In vivo, deliberately activating this pathway shrank tumors in an mTORC2-dependent manner.
