PDRN prevents SIRT1 degradation by attenuating autophagy during skin aging.
Level 5 - mechanism / opinion, no new human data
Preclinical in vitro and animal experimental research
PubMed 40343916 · doi:10.1371/journal.pone.0321005
What was done
Researchers evaluated the protective effects and molecular mechanisms of polydeoxyribonucleotide (PDRN, a salmon sperm-derived fragment) against cellular senescence induced by ultraviolet B (UVB) radiation or hydrogen peroxide (H2O2) in cell models, as well as UVB-induced epidermal thickening in a mouse model. They assessed cell viability, markers of senescence, autophagy dynamics, stress granule formation, and the regulation of SIRT1, LC3, and p62.
What was found
The abstract reports directional findings without numerical values or effect sizes: - PDRN mitigated declines in cell viability and suppressed cellular aging markers induced by UVB or H2O2. - In mice, PDRN ameliorated UVB-induced epidermal thickening. - Mechanistically, PDRN reduced nuclear autophagy and cytoplasmic stress granule formation by preventing nuclear accumulation of damaged LC3 and inhibiting cytoplasmic degradation of SIRT1 and p62.
Why it matters
This study outlines a mechanistic pathway by which PDRN exerts anti-aging and antioxidant effects in skin models, specifically by preserving SIRT1 levels through autophagy modulation.
Limits
The study is restricted to preclinical in vitro assays and a mouse model, lacking direct human clinical testing. The abstract provides no quantitative data, sample sizes, dosage details, or statistical effect sizes.
Cited by
- supports PDRN (polydeoxyribonucleotides) used in injectable skin treatments is derived from salmon sperm DNA.