Peptides and therapeutic agent for autoimmune diseases...

C - Chemistry – Metallurgy – 07 – K

Patent

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Details

C07K 7/06 (2006.01) A61K 38/08 (2006.01) A61P 29/00 (2006.01) A61P 37/06 (2006.01)

Patent

CA 2217679

The present invention relates to a peptide having the following amino acid sequence: Ala-Xaa1-Leu-Xaa2-Phe-Xaa3-Xaa4-Xaa5-(Xaa6)n (wherein Xaa1 and Xaa4 each independently represents an amino acid residue which may have an alkyl or heteroalkyl side chain which may be substituted by a hydroxy, amino or guanidyl group; Xaa2 and Xaa6 each independently represents an amino acid residue which may have an alkyl or heteroalkyl side chain which may be substituted by a hydroxyl group; Xaa3 and Xaa5 each independently represents an amino acid residue which may have a hydrophobic side chain; and n stands for 1 or 0), or derivatives thereof; and a modification thereof. The peptide or derivatives thereof according to the present invention is useful as a pharmaceutical composition for the prevention and treatment of autoimmune diseases, rejection reaction attendant on the organ transplantation, inflammation or the like.

Cette invention concerne des peptides dont la séquence d'acides aminés correspond à la formule suivante, ainsi que leurs dérivés et modifications: Ala-Xaa1-Leu-Xaa2-Phe-Xaa3-Xaa4-Xaa5-(Xaa6)n, dans laquelle Xaa1 et Xaa4 représentent chacun indépendamment un reste d'acide aminé possédant éventuellement une ou plusieurs chaînes latérales alkyle ou hétéroalkyle éventuellement substituées par hydroxy, amino ou guanidyle; Xaa2 et Xaa6 représentent chacun indépendamment un reste d'acide aminé possédant éventuellement une ou plusieurs chaînes latérales alkyle ou hétéroalkyle éventuellement substituées par hydroxy; Xaa3 et Xaa5 représentent chacun indépendamment un reste d'acide aminé possédant éventuellement une ou plusieurs chaînes latérales hydrophobes; et n est égal à 0 ou 1. Ces peptides, ainsi que leurs dérivés sont utiles dans des compositions médicinales visant à prévenir ou à traiter les maladies auto-immunes, les réactions de rejet lors de transplantations d'organes, les inflammations, etc.

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