Polysaccharides extracted from Pausinystalia macroceras (PMP) extended lifespan and preserved healthspan in both C. elegans and Drosophila without disrupting growth, reproduction, or feeding behavior. Mechanistically, PMP reduced intracellular reactive oxygen species, lipofuscin accumulation, and polyglutamine aggregation while activating DAF-16/FOXO and SKN-1/Nrf2 longevity signaling cascades, upregulating downstream antioxidants SOD-3 and GST-4. Metabolomic data suggest PMP also normalizes amino acid, carbohydrate, and energy metabolism during aging.
The dual-model validation — invertebrate worm plus fly — meaningfully strengthens confidence beyond single-organism studies, since concordant lifespan extension across phylogenetically distant species implies genuine engagement of conserved longevity machinery rather than species-specific artifact. DAF-16/FOXO and SKN-1/Nrf2 are among the most replicated pro-longevity targets in geroscience, so activating both simultaneously is pharmacologically interesting, echoing the logic behind caloric restriction mimetics. The proteostasis findings (reduced polyglutamine aggregation) add relevance to neurodegenerative disease contexts.
Critical limitations temper enthusiasm considerably: neither C. elegans nor Drosophila translates directly to mammalian longevity; no rodent or human data exist; and polysaccharide bioavailability and gut metabolism in mammals remain poorly characterized. The study is mechanistically solid but fundamentally preclinical. For longevity researchers, it identifies PMP as a credible candidate warranting mammalian validation — incremental but directionally meaningful work in the crowded natural-compound longevity space.
