Mitochondrial dynamics in aging and disease.
Level 5 - mechanism / opinion, no new human data
Narrative review of biological mechanisms without systematic search methodology or empirical human data.
PubMed 25149215 · doi:10.1016/B978-0-12-394625-6.00004-0
What was done
This is a narrative review describing the physiological and mechanistic roles of mitochondrial trafficking, fusion, and fission in cellular function, aging, and disease.
What was found
The abstract reports no numerical data or effect sizes. It qualitatively describes that mitochondria supply cytoplasmic ATP, regulate calcium, and rely on motor molecules for targeted intracellular transport, particularly in elongated neurons. During aging and disease, reactive oxygen species and replication errors induce mtDNA mutations. Frequent fusion supports functional complementation, while fission isolates dysfunctional organelle segments for autophagic degradation; genetic disruptions in these transport, fusion, and fission machineries cause severe cellular deficits and drive neurodegeneration.
Why it matters
It outlines how disruptions in structural mitochondrial remodeling and transport mechanisms contribute to the cellular decline associated with aging and neurodegenerative disorders.
Limits
This is a narrative review with no systematic search methodology, quantitative data, sample sizes, or human clinical trial results presented in the abstract.
Cited by
- supports Mitochondria repair damaged components through mitochondrial fusion and fission by exchanging DNA and proteins.