PDRN

PDRN (polydeoxyribonucleotide) is a blend of purified DNA fragments of low molecular weight — by convention 50-1,500 kDa — obtained from the gonadal tissue of salmon or trout and treated to strip out protein and antigenic components. It is no more a peptide than hyaluronic acid is; we list it because skin and repair studies use it alongside peptides, as a reference or in combinations.

Mechanisms under discussion

Two explanations are generally put forward. One is A2A adenosine receptor agonism, associated in cell and rodent work with changes in inflammatory signalling and VEGF levels. The second is the salvage pathway: as the DNA is broken down enzymatically, the resulting nucleotides and nucleosides can be reused by cells for DNA synthesis instead of building them from scratch. Both remain mechanistic hypotheses, resting mostly on cell-culture and rodent evidence and a number of small clinical studies, largely from South Korea and Italy, where PDRN products hold registrations.

Specification is more important here than with a synthetic peptide: what matters is the species of origin, how fragment sizes are distributed, and residual protein and endotoxin — and unlike a defined sequence, identity cannot simply be confirmed with MS. Ask for the size profile and an endotoxin value on the certificate.

Related terms and material

tissue repair and angiogenesis are related topics. Our shop lists PDRN in 2 mL and 5 mL vials at 2%, next to cosmetic peptides; the article on PDRN hype versus evidence adds context.