Recombinant vitamin k dependent proteins with high sialic...

C - Chemistry – Metallurgy – 12 – N

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C12N 9/64 (2006.01) A61K 35/14 (2006.01) A61K 38/17 (2006.01) A61K 38/48 (2006.01) A61P 7/04 (2006.01) C07K 2/00 (2006.01)

Patent

CA 2683423

Methods of isolating highly sialylated recombinant vitamin K dependent proteins, particularly Factor IX, by chromatographic methods are described. The highly sialylated recombinant proteins are characterized. The improved Factor IX has at least 62% N- glycosylation with 3 or 4 sialic acid residues and improved bioavailability and pharmokinetic properties.

La présente invention décrit des procédés permettant d'isoler des protéines dépendantes de la vitamine K recombinées à teneur élevée en acide sialique, particulièrement le facteur IX, par des procédés chromatographiques. Les protéines recombinées à teneur élevée en acide sialique sont caractérisées. Le facteur IX amélioré présente au moins 62 % de N- glycosylation avec 3 ou 4 résidus d'acide sialique et une biodisponibilité et des propriétés pharmacocinétiques améliorées.

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