Neurotrophin antagonists

C - Chemistry – Metallurgy – 07 – K

Patent

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Details

C07K 14/48 (2006.01) A61K 38/08 (2006.01) A61K 38/10 (2006.01) A61K 38/18 (2006.01) C07K 7/06 (2006.01) C07K 7/08 (2006.01) C12N 5/06 (2006.01) C12N 5/08 (2006.01)

Patent

CA 2204906

A novel neurotrophin antagonist is described. The antagonist is a bicyclic peptide preferably derived from the internal reverse turn region of a member of the structurally similar neurotrophin family including NGF, BDNF, NT-3, NT- 4, NT-5 and NT-6. Generally, the antagonist comprises amino acids from positions (58-68) and (108-110) of a neurotrophin, in which the amino acid from position 58 is covalently bound to the amino acid from position 108 and the amino acid from position 68 is covalently bound to the amino acid at position 110 to form a bicyclic structure. The neurotrophin-derived antagonists are useful to inhibit undesirable neurotrophin-mediated activity such as the neurite outgrowth that occurs in some neurodegenerative disease states.

L'invention a trait à un nouvel antagoniste de la neurotrophine. Cet antagoniste est un peptide bicyclique, dérivé, de préférence, d'une région interne à spire inversé d'un membre de la famille des neurotrophines, similaire d'un point de vue structurel, au nombre desquels on compte NGF, BDNF, NT-3, NT-4, NT-5 et NT-6. Ces antagonistes comprennent, en règle générale, des acides aminés se trouvant placés entre les positions 58-68 et 108-110 d'une neurotrophine, l'acide aminé se trouvant en position 58 possédant une liaison covalente avec l'acide aminé de la position 108 tandis que l'acide aminé occupant la position 68 est lié de manière covalente avec celui qui est situé à la position 110, de manière à constituer une structure bicyclique. Les antagonistes dérivés de la neurotrophine s'avèrent des plus utiles pour inhiber une activité indésirable à médiation neurotrophinique comme une excroissances des axones et des dendrites survenant lors de certains états pathologiques neurodégénératifs.

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