Review: Mitochondrial Dysfunction as a Hub of Aging and Inter-Organ Signaling
This review describes mitochondrial dysfunction as a driver of aging, with reactive oxygen species, mitochondrial DNA damage, impaired mitophagy and metabolic reprogramming, and mitochondria as signaling hubs between organs. It also summarizes interventions that are promising in animals but lack long-term safety data in humans. [1]
Automatic summary · not editorially reviewed
The key findings
The review names reactive oxygen species-induced redox imbalance, mitochondrial DNA damage accumulation, impaired mitophagy and metabolic reprogramming as core mechanisms of mitochondrial dysfunction in aging. [1]
Dysfunctional mitochondria secrete mitokines such as FGF21 and GDF15 and release damage-associated molecular patterns, triggering chronic inflammation via cGAS-STING and NLRP3 pathways. [1]
Interventions are promising in animal models, but clinical translation is hindered by limited long-term safety data and evidence gaps. [1]
The source at a glance
- Study type / format
- Review (abstract only)
- Population / context
- Aging biology, described in a review covering molecular mechanisms and inter-organ signaling
- Summary based on
- Study abstract
- Original publication
- August 17, 2026
Mitochondrial mechanisms named in the review
The review presents mitochondrial dysfunction as a fundamental driver of aging that causes progressive functional decline through complex molecular cascades. It names four core mechanisms: redox imbalance caused by reactive oxygen species, accumulation of mitochondrial DNA damage, impaired mitophagy (the cell's removal of damaged mitochondria) and metabolic reprogramming. These are described as mechanisms of aging biology, not as proven causes of specific human diseases.
Supporting source [1]
Mitochondria as signaling hubs between organs
According to the review, mitochondria act as signaling hubs for crosstalk between organs. Dysfunctional mitochondria secrete mitokines such as FGF21 and GDF15 and release damage-associated molecular patterns. This triggers chronic inflammation via the cGAS-STING and NLRP3 inflammasome pathways. The review states that this actively drives systemic aging along the skeletal muscle–brain and adipose/liver–cardiovascular axes. These are described associations within aging biology, not proof that mitochondria cause human lifespan changes.
Supporting source [1]
Interventions and evidence gaps in the review
The review summarizes current therapeutic interventions: lifestyle modifications, NAD+ precursors, and frontier technologies such as mitochondrial transplantation and gene editing. It states that these are promising in animal models, but that clinical translation is hindered by limited long-term safety data and evidence gaps. It calls for mitochondria-targeted studies with integrated multi-organ phenotyping to establish strategies for extending human healthspan. The abstract does not report human trial results, sample sizes or follow-up.
Supporting source [1]
How to interpret this
This is an abstract of a review; the full text was not reviewed. The abstract reports no human trial results, sample sizes or follow-up, and the interventions are described as promising in animal models only.
Based on the study abstract; the full paper, tables and supplementary data were not reviewed.
Source & supporting passages
Han C, Zhang Z, Song Y. · europepmc.org · August 17, 2026