Method of purifying exosomes

Abstract

We describe a method of purifying a mesenchymal stem cell particle such as an exosome, the method comprising separating the mesenchymal stem cell particle on the basis of its negative charge. The method may comprise (a) providing a composition comprising mesenchymal stem cell particles such as a mesenchymal stem cell conditioned medium (MSC-CM); (b) applying the composition comprising mesenchymal stem cell particles to an ion exchange resin to enable mesenchymal stem cell particles to bind to the ion exchange resin; and (c) eluting bound mesenchymal stem cell particles. The ion exchange resin may comprise an anion exchange resin such as an anion exchange spin column.

Dependencies are inferred from the claim text.