Methods for improving purification and quantification of platelet derived growth factor (PDGF) proteins having structural heterogeneity are provided. Preparation of substantially pure isoforms of these proteins is achieved using TSK sulfopropyl cation exchange chromatography and reverse phase high performance liquid chromatography. A reverse charged capillary zone electrophoresis method enables quantification of substantially pure isoforms of these proteins resulting from endoproteolytic post-translational modifications. Compositions of the invention are substantially purified isoforms of secreted PDGF proteins having structural heterogeneity, more particularly purified intact, single-clipped, and double-clipped isoforms of recombinant PDGF-BB. Pharmaceutical compositions comprising at least one of these substantially purified recombinant PDGF isoforms and methods for their use in promoting wound healing are also provided.

Os métodos para melhorar o purification e a quantificação das proteínas derivadas platelet do fator do crescimento (PDGF) que têm o heterogeneity estrutural são fornecidos. A preparação de isoforms substancialmente puros destas proteínas é conseguida usando o chromatography da troca de cation do sulfopropyl de TSK e o chromatography líquido reverso de desempenho elevado da fase. Um método capilar carregado reverso do electrophoresis da zona permite a quantificação de isoforms substancialmente puros destas proteínas resultando das modificações borne-post-translational endoproteolytic. As composições da invenção são substancialmente isoforms purified das proteínas secreted de PDGF que têm o heterogeneity estrutural, purified mais particularmente intact, isoforms único-grampeados, e dobro-grampeados de PDGF-BB recombinant. As composições pharmaceutical que compreendem ao menos um destes isoforms recombinant substancialmente purified e de métodos de PDGF para seu uso em promover a ferida que healing são fornecidas também.

 
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