Fc-erythropoietin fusion protein with improved pharmacokinetics

C - Chemistry – Metallurgy – 07 – K

Patent

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Details

C07K 14/505 (2006.01)

Patent

CA 2551916

The present invention provides novel highly sialylated Fc-EPO fusion proteins preferably comprising a couple of modifications in the Fc- portion as well as in the EPO portion and having improved pharmacokinetics. Specifically, the Fc- EPO proteins have a prolonged serum half-life and increased in vivo potency. The Fc-EPO fusion proteins synthesized in BHK cells have dramatically prolonged serum half-lives and increased in vivo potency when compared to corresponding Fc-EPO fusion proteins produced in other cell lines, such as, for example, NS/O cells.

La présente invention a trait à des protéines hybrides Fc-EPO soumises à une sialylation élevée comportant de préférence une paire de modifications dans la portion Fc ainsi que dans la portion EPO et présentant une pharmacocinétique améliorée. De manière spécifique, les protéines Fc-EPO ont une demi-vie sérique prolongée et une puissance accrue in vivo. Les protéines hybrides Fc-EPO synthétisées dans des cellules BHK ont des demi-vies sériques dramatiquement prolongées et une puissance in vivo accrue par comparaison aux protéines hybrides Fc-EPO dans d'autres lignées cellulaires, telles que, par exemple, des cellules NS/O.

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