Linking mitochondrial DNA release to neurodegeneration and cognitive decline

Feb 23, 2026Ageing research reviews

How Mitochondrial DNA Release Is Linked to Brain Cell Loss and Memory Decline

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Abstract

Mitochondrial DNA (mtDNA) is an active driver of inflammatory processes in neurodegenerative diseases.

  • mtDNA is susceptible to oxidative damage and can trigger immune responses when released from mitochondria.
  • The mechanisms regulating mtDNA escape from mitochondria involve defects in mitochondrial quality control.
  • Impaired mitophagy and macroautophagy lead to the accumulation of damaged mtDNA.
  • Damaged mtDNA can be released through mitochondria-derived vesicles, exosomes, or as cell-free mtDNA.
  • The interplay between mitochondrial dysfunction and immune activation is linked to neurodegeneration and cognitive decline.

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