Glucagon/glp-1 receptor co-agonists

C - Chemistry – Metallurgy – 07 – K

Patent

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C07K 14/605 (2006.01) A61K 38/26 (2006.01)

Patent

CA 2677932

Modified glucagon peptides are disclosed having enhanced potency at the glucagon receptor relative to native glucagon. Further modification of the glucagon peptides by forming lactam bridges or the substitution of the terminal carboxylic acid with an amide group produces peptides exhibiting glucagon/GLP-1 receptor co- agonist activity. The solubility and stability of these high potency glucagon analogs can be further improved by modification of the polypeptides by pegylation, substitution of carboxy terminal amino acids, or the addition of a carboxy terminal peptide selected from the group consisting of SEQ ID NO: 26 (GPSSGAPPPS), SEQ ID NO: 27 (K-RNRNNIA) and SEQ ID NO: 28 (KRNR).

L'invention concerne des peptides modifiés du glucagon qui présentent une efficacité accrue sur les récepteurs du glucagon par rapport au glucagon natif. Une autre modification des peptides du glucagon, qui consiste à former des ponts lactame ou à substituer l'acide d'extrémité carboxylique par un groupe amide, permet de produire des peptides qui présentent une activité co-agoniste des récepteurs du glucagon/GLP-1. La solubilité et la stabilité de ces analogues très efficaces du glucagon peuvent être améliorées davantage par la modification des polypeptides par pégylation, la substitution d'acides aminés d'extrémité carboxylique ou l'ajout d'un peptide d'extrémité carboxylique, sélectionné dans le groupe constitué par SEQ ID NO: 26 (GPSSGAPPPS), SEQ ID NO: 27 (K-RNRNNIA) et SEQ ID NO: 28 (KRNR).

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