CHARACTERIZATION AND QUANTITATION OF THE ACTIVE POLYNUCLEOTIDE FRACTION (PDRN) FROM HUMAN PLACENTA, A TISSUE-REPAIR STIMULATING AGENT

The polydeoxyribonucleotide (PDRN) fraction is an extract which forms the active component in a new formulation of the drug Placentex (a tis sue repair stimulating agent) obtained from human placenta through an original proprietory extraction method. From a comparison of the UV, N MR and IR spectra of this fraction (before and after nuclease treatmen t) with that of a similar standard (Sigma D1501), it was shown that th e active substances in the PDRN fraction mainly consist of a mixture o f DNA fragments. By gel electrophoresis, the molecular weights of the DNA fragments were shown to range from 50 to 2000 base pairs. Finally, an HPLC method is described, based on an anion-exchange material capa ble of determining the amount of PDRN in different batches of the extr act, which varied from 80 to 90%.