Distinct roles of urolithin A and spermidine in mitophagy and autophagy: implications for dietary supplementation.
Level 5 - mechanism / opinion, no new human data
Narrative review synthesizing mechanistic pathways without systematic review methodology or new primary human data.
PubMed 41404767 · doi:10.1017/S0954422425100292
What was done
This narrative review analyzed the comparative biological mechanisms of urolithin A and spermidine, focusing on their respective signaling pathways in mitophagy and general autophagy, as well as their proposed translational roles in dietary supplementation for aging.
What was found
The abstract reports no numerical data or effect sizes. It describes that urolithin A stimulates mitophagy via PTEN-induced kinase 1 (PINK1) and Parkin RBR E3 ubiquitin protein ligase (PRKN) pathways to improve mitochondrial and muscle health, while spermidine induces broader autophagy via 5′ AMP-activated protein kinase (AMPK) and sirtuin 1 pathways to support metabolic, cardiovascular, and cognitive health.
Why it matters
It outlines distinct mechanistic profiles for two popular longevity supplements, framing urolithin A as a targeted mitochondrial quality-control agent and spermidine as a broad systemic autophagy inducer.
Limits
The abstract contains only qualitative mechanistic descriptions without quantitative clinical trial outcomes, human intervention data, dosing parameters, or a systematic search methodology.
Cited by
- supports Urolithin A stimulates mitophagy to degrade dysfunctional mitochondria.