Mitochondrial dysfunction as a hallmark of aging

Definition

Category: Causal-framing concept

Also known as: mitochondrial aging, hallmark of aging

Mitochondrial dysfunction is included in the Hallmarks of Aging framework. The framework discusses changes in respiration, turnover, membrane organization and stress responses across aging models. These processes and ROS changes are context-dependent rather than a single universal decline; some dysfunction models do not show increasedROS. A mitochondrial biomarker change in a trial does not establish an effect on human aging.

Key points

• The hallmark framing is associative and mechanistic, not proof that any single intervention that improves a mitochondrial measure extends healthy human lifespan.
• The 2013 framework discusses respiration, mitophagy, biogenesis, mitochondrial dynamics and stress responses as distinct processes. Their changes and effects vary across experimental systems; a framework synthesis is not direct validation of every cited experiment.
• This causal-framing page exists so that every intervention page can be read against the honest gap between 'improves a mitochondrial endpoint' and 'slows human aging'.

Sourcing

López-Otín et al., The Hallmarks of Aging (2013), DOI10.1016/j.cell.2013.05.039: original proposed framework and full mitochondrial-dysfunction/ROS/integrity/mitohormesis sections. Used for framework categorization and interpretation limits, not as independent primary proof of each cited experiment or a clinical intervention. Its Safdar2011 exercise reference is marked retracted in the preserved original reference list and is not used here to validate exercise efficacy.

Reference synthesis (mechanism context, not a human-trial evidence tier).