Modified peptides, comprising an fc domain, as therapeutic...

C - Chemistry – Metallurgy – 07 – K

Patent

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C07K 19/00 (2006.01) C07K 14/505 (2006.01) C07K 14/52 (2006.01) C07K 14/525 (2006.01) C07K 14/545 (2006.01) C12N 1/21 (2006.01) C12N 9/64 (2006.01) C12N 15/62 (2006.01) C12N 15/70 (2006.01) A61K 38/00 (2006.01)

Patent

CA 2347131

The present invention concerns fusion of Fc domains with biologically active peptides and a process for preparing pharmaceutical agents using biologically active peptides. In this invention, pharmacologically active compounds are prepared by a process comprising: a) selecting at least one peptide that modulates the activity of a protein of interest; and b) preparing a pharmacologic agent comprising an Fc domain covalently linked to at least one amino acid of the selected peptide. Linkage to the vehicle increases the half- life of the peptide, which otherwise would be quickly degraded in vivo. The preferred vehicle is an Fc domain. The peptide is preferably selected by phage display, E. coli display, ribosome display, RNA-peptide screening, or chemical- peptide screening.

L'invention concerne la fusion de domaines Fc à l'aide de peptides biologiquement actifs, et une technique de préparation d'agents pharmaceutiques utilisant lesdits peptides. Dans cette invention, des composés pharmaceutiquement actifs sont préparés au moyen d'une technique consistant: a) à sélectionner au moins un peptide qui module l'activité de la protéine considérée; et b) à préparer un agent pharmacologique comprenant un domaine Fc, lié de manière covalente à au moins un acide aminé du peptide sélectionné. Cette liaison à un excipient augmente la demi-vie biologique du peptide, qui autrement serait rapidement dégradé in vivo. L'excipient préféré est un domaine Fc. Le peptide est de préférence sélectionné par affichage par phages, par affichage par E. coli, par affichage par ribosome, par criblage par liaison ARN-peptide, ou par criblage par peptide d'origine chimique.

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