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SPAG7 deletion causes intrauterine growth restriction, resulting in adulthood obesity and metabolic dysfunction elifesciences.org - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from elifesciences.org Daily Mail and Mail on Sunday newspapers.
Senescent cells drive age-related tissue dysfunction partially through the induction of a chronic senescence-associated secretory phenotype (SASP)1. Mitochondria are major regulators of the SASP; however, the underlying mechanisms have not been elucidated2. Mitochondria are often essential for apoptosis, a cell fate distinct from cellular senescence. During apoptosis, widespread mitochondrial outer membrane permeabilization (MOMP) commits a cell to die3. Here we find that MOMP occurring in a subset of mitochondria is a feature of cellular senescence. This process, called minority MOMP (miMOMP), requires BAX and BAK macropores enabling the release of mitochondrial DNA (mtDNA) into the cytosol. Cytosolic mtDNA in turn activates the cGAS–STING pathway, a major regulator of the SASP. We find that inhibition of MOMP in vivo decreases inflammatory markers and improves healthspan in aged mice. Our results reveal that apoptosis and senescence are regulated by similar mitochondria-depende ....
Metabolic and Neurobehavioral Disturbances Induced by Purine Recycling Deficiency in Drosophila elifesciences.org - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from elifesciences.org Daily Mail and Mail on Sunday newspapers.