Recycles mitochondria
Mitophagy
Also searched as Mitophagy.
You want it active: pruning failing mitochondria is essential to sustained energy and healthy aging.
In depth
The quality-control program that finds and clears damaged mitochondria, keeping the cellular power grid clean.
What drives it
Energy sensing increases it.
Egan 2011, Science — AMPK phosphorylates ULK1 (the Atg1 ortholog), connecting energy sensing to mitophagy; loss of AMPK/ULK1 causes defective mitophagy. doi:10.1126/science.1196371. Verified: AMPK directly phosphorylates mitochondrial fission factor (MFF) to drive DRP1-mediated fission -- fission being required for mitophagy -- and activates ULK1, the upstream kinase of autophagy and mitophagy. AMPK phosphorylation of ULK1 is required for targeting mitochondria to lysosomes in exercise-induced mitophagy. The prevailing view is under active challenge and the atlas should say so: a 2024 Molecular Cell paper titled 'opposing roles for AMPK in regulating distinct mitophagy pathways' states that the role of AMPK as a general ULK1 activator is not necessarily true — some AMPK sites on ULK1 are stimulatory, but the authors identified two that ARE not. AMPK phosphorylation at ULK1 Ser694 together with Ser556 is required for 14-3-3 binding, which sequesters ULK1 and prevents phagophore formation during mitophagy initiation. They propose ULK1 acts as a logic gate integrating AMPK and mTOR: under energy starvation AMPK inhibits ULK1 to prevent excess bulk autophagy, and that signal is overridden only when amino acids are absent. Their rationale: autophagy may itself be an energy-consuming pathway. The sign of this arrow is site-dependent and contested. doi 10.1126/science.1196371.
Mitochondrial membrane lipid increases it.
Externalised cardiolipin marks the mitochondrion for disposal. Damage to one lipid is both the death trigger and the disposal tag. Carried by the intermediary-metabolism, micronutrient and redox reviews. doi 10.3390/nu18132141 · PMC9967593
What it drives
It reduces Clears worn-out cells.
Correia-Melo 2016, EMBO J 35:724 — Parkin-mediated mitophagy depletes the mitochondria senescence requires, suppressing the phenotype. PMID 26848154
It increases Builds mitochondria.
Biogenesis–mitophagy crosstalk review 2023 — mitophagy is tightly coordinated with PGC-1α-driven biogenesis to renew the mitochondrial pool. doi 10.1186/s12929-023-00975-7
It increases Hearing.
Mitochondrial antioxidants, modulators of mitochondrial function, calcium channel blockers, and mtDNA mutations that affect mitochondrial activity in the auditory system have emerged as critical factors in hearing protection. The reviewers state their own gap: there is still a lack of information on the underlying mechanisms of redox homeostasis and molecular redox networks in hair cells - so these are protective-target candidates, not demonstrated interventions. The clinical fact that makes protection the only strategy: mammalian cochlear hair cells do not regenerate, which is why SNHL is described as the most common type of permanent hearing impairment. doi 10.1016/j.mito.2025.102063 · PMC10102650
It reduces Cellular aging.
Mitophagy clears damaged mitochondria - hallmark 10 acting on hallmark 6. doi 10.1016/j.molmet.2023.101755 · PMC12293478
It increases Vision.
Why the retina is the most oxidatively stressed tissue in the body, stated directly: the retina is highly susceptible to oxidative damage due to its elevated oxygen consumption, abundant polyunsaturated fatty acids, and continuous exposure to light. Three risk factors that cannot be separated from its function. And the aging failure is specific and double: in the elderly both the mitophagic process and Nrf2 activation ARE impaired, thus causing retinal cell death. The carotenoid case is unusually mechanical: lutein and zeaxanthin ARE selectively taken up by the RPE, preferentially accumulated in the human macula, and transferred to photoreceptors - a targeted delivery route, not a general antioxidant claim. The Eye Disease Case-Control Study found high plasma levels of lutein and zeaxanthin associated with reduced risk of neovascular AMD. By contrast the reviewers say the relationships between dietary and serum levels of the antioxidant vitamins and age-related macular disease ARE less clear - with alpha-tocopherol the exception, convincingly demonstrated. Lipofuscin is itself a photoreactive substance - the waste product becomes a new damage source. doi 10.3390/antiox14101251 · PMID 11033038 · PMC12026614
It increases Mitochondrial DNA.
Selective removal of damaged mitochondria preserves the integrity of the remaining genome pool. doi 10.1016/j.cell.2022.11.001 · PMID 23746838 · PMC7139312
Blends that modulate it
Each blend page names this pathway and carries the study behind its claim.
See it on the map
Open the causal map to follow this pathway upstream and downstream, arrow by arrow, each with its study.