Adaptive responses of neuronal mitochondria to bioenergetic challenges: Roles in neuroplasticity and disease resistance.
Level 5 - mechanism / opinion, no new human data
Narrative review synthesizing mechanistic and theoretical models without primary data or systematic review methodology
PubMed 27908782 · doi:10.1016/j.freeradbiomed.2016.11.045
What was done
This narrative review synthesizes mechanistic research regarding how neuronal mitochondria respond adaptively to bioenergetic challenges, such as synaptic activity, aerobic exercise, and fasting. The paper outlines the signaling pathways (including Ca²⁺, CREB, PGC-1α, NF-κB, BDNF, and peripheral signals like ketone bodies and irisin) involved in mitochondrial biogenesis, synaptic plasticity, neurogenesis, and cellular stress resistance.
What was found
The abstract provides a conceptual synthesis and reports no quantitative data or specific numerical effect sizes. It describes how fasting and exercise trigger a metabolic switch to fatty acids and ketone metabolites, stimulating intrinsic and peripheral signaling pathways. These pathways promote antioxidant defenses, autophagy/mitophagy, DNA repair, and neuroplasticity, potentially conferring resistance against neurodegeneration and acute brain injury through hormetic mechanisms.
Why it matters
It provides a unifying bioenergetic framework connecting intermittent lifestyle stressors (exercise, caloric restriction, cognitive challenge) to cellular resilience, mitochondrial health, and neuroprotection.
Limits
The abstract describes a conceptual narrative review containing no empirical human trials, meta-analytic data, or quantitative findings. Broad translational hypotheses regarding neuroprotection against diseases like Alzheimer's, Parkinson's, and stroke are primarily based on preclinical and mechanistic models.
Cited by
- supports Fasting activates cellular autophagy and mitophagy.