A method of recovering highly purified vwf or factor...

C - Chemistry – Metallurgy – 07 – K

Patent

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C07K 14/755 (2006.01) A61K 38/38 (2006.01) A61K 38/00 (2006.01)

Patent

CA 2282842

Disclosed is a method of recovering highly purified vWF or factor VIII/vWF-complex by means of immunoaffinity chromatography, which is characterized in that vWF or factor VIII/vWF-complex bound to an immunoadsorbent is eluted by means or an eluting agent containing as an essential active ingredient a zwitterion, while retaining the molecular integrity of vWF or of the factor VIII/vWF-complex. Furthermore, the invention relates to a preparation containing highly purified vWF having a specific activity of at least 100 U/mg protein, obtainable by immunoaffinity chromatography, as well as to the use of this preparation for producing a medicament for the treatment of vWD or of phenotypic hemophilia A.

L'invention concerne un procédé permettant d'obtenir un facteur de von Willebrand (vWF) ou un complexe facteur VIII/vWF de grande pureté par chromatographie d'immunoaffinité. Ce procédé est caractérisé en ce qu'un vWF ou un complexe facteur VIII/vWF est élué avec un milieu d'élution contenant un ion dipolaire comme constituant actif essentiel tout en conservant son intégrité moléculaire. L'invention concerne également une préparation contenant des vWF de grande pureté avec une activité spécifique d'au moins 100 U/mg de protéine pouvant être obtenue par chromatographie d'immunoaffinité. L'invention concerne enfin l'utilisation de cette préparation pour la production d'un médicament destiné au traitement de la maladie de von Willebrand-Jürgens ou de l'hémophilie phénotypique A.

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