Polymer-von willebrand factor-conjugates

A - Human Necessities – 61 – K

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A61K 47/48 (2006.01)

Patent

CA 2591852

The present invention relates to a proteinaceous construc (also designated as polymer-VWF-conjugate) comprising plasmatic and/or recombinant von Willebrand factor (VWF), said VWF being bound to at least one physiologically acceptable polymer molecule, as well as to a complex said proteinaceous construc and at least one factor VIII (FVIII) protein. The physiologically acceptable polymer molecule can be, for instance, polyethylene glycol (PEG) or polysialic acid (PSA). Further the present invention relates to methods for prolonging the in vivo-half-life of VWF or FVIII in the blood of a mammal having a bleeding disorder associated with functional defects of or deficiencies of at least one of FVIII or VWF.

La présente invention concerne une construction protéique, également connue comme "conjugué polymère-vWF", comprenant du facteur von Willebrand (vWF) plasmatique et/ou recombinant. Ce vWF est lié à au moins une molécule polymère physiologiquement admise, ainsi qu'à un complexe entre cette construction protéique et au moins une protéine facteur VIII (FVIII). La molécule polymère physiologiquement admise peut être notamment le polyéthylène-glycol (PEG) ou l'acide polysialique (PSA). L'invention concerne également des procédés permettant de prolonger la demie vie in vivo du vWF ou du FVIII dans le sang d'un mammifère souffrant d'un trouble de saignement associé à des défaillances fonctionnelles ou à des déficiences de l'un au moins des FVIII et vWF.

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