Factor viia- (poly) sialic acid conjugate having prolonged...

A - Human Necessities – 61 – K

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A61K 47/48 (2006.01)

Patent

CA 2670618

The present invention relates to a proteinaceous construct comprising plasmatic or recombinant factor Vila (F VHa) or biologically active derivatives thereof, which are bound to a carbohydrate moiety comprising 1-4 sialic acid units, wherein the in vivo half-life of the proteinaceous construct is substantially prolonged in the blood of a mammal, as compared to the in vivo half-life of a FVlIa molecule not bound to a carbohydrate moiety. The invention also provides a method for controlling bleeding in a mammal having a bleeding disorder due to functional defects or deficiencies of FVIIa, FVlII, or FIX. The invention also provides a method for controlling bleeding in a mammal during surgery or trauma.

La présente invention concerne un assemblage protéinique qui comprend un facteur Vila (F VHa) plasmatique ou recombiné ou leurs dérivés biologiquement actifs, qui sont liés à une fraction glucidique renfermant des unités d'acide sialique 1-4, la demi-vie in vivo de l'assemblage protéinique étant sensiblement prolongée dans le sang d'un mammifère, par comparaison avec la demi-vie in vivo d'une molécule FVlIa non liée à une fraction glucidique. L'invention porte aussi sur un procédé permettant de contrôler les saignements chez un mammifère présentant des troubles hémostatiques induits par des défauts fonctionnels ou des déficiences des FVIIa, FVlII ou FIX. L'invention se rapporte également à un procédé permettant de contrôler les saignements chez un mammifère lors d'une opération chirurgicale ou d'un traumatisme.

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