Inhibitors of fibrin cross-linking and/or transglutaminases

C - Chemistry – Metallurgy – 07 – K

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Details

C07K 14/435 (2006.01) A61K 38/16 (2006.01) A61K 38/49 (2006.01) C12N 9/10 (2006.01) C12Q 1/48 (2006.01) C12Q 1/56 (2006.01) A61K 38/00 (2006.01)

Patent

CA 2220268

The inhibitors, obtainable from tissue or secretions of leeches typically of the order Rhynchobdellida, has the following terminal sequence: NH2-Lys-Leu- Leu-Pro-Cys-Lys-Glu-Y-His-Gln-Gly-Ile-Pro-Asn-Pro-Arg- wherein Y represents any amino acid sequence; or a pharmaceutically acceptable salt, derivative or bioprecursor of said sequence, or an analogue or homologue thereof. Because of their extreme potency in the nanomolar range, they can be used to treat a number of diseases where protein cross-linking is important. They can be used for the treatment of Crohn's disease, tumor implantation, atherosclerosis, thrombotic microangiophathy, fibrous growths of the skin, acne, scar formation, membranous glomerulonephritis, cataracts, or infection with microfilarial nematodes. In particular, they can be used to reduce the stability of thrombi so that they are more susceptible to lysis by thrombolytic agents.

Inhibiteurs dérivés de tissus ou de sécrétions de sangsues, appartenant plus exactement à l'ordre Rhynchobdellida et possédant la séquence terminale suivante: NH¿2?-Lys-Leu-Leu-Pro-Cys-Lys-Glu-Y-His-Gln-Gly-Ile-Pro-Asn-Pro-Arg, dans laquelle Y représente une séquence d'acides aminés quelconque; ou un sel, un dérivé ou un bioprécurseur pharmaceutiquement acceptable de cette séquence, ou bien un analogue ou un homologue de cette dernière. Etant donné que ces inhibiteur sont très puissants dans la plage nanomolaire, on peut les utiliser pour traiter plusieurs maladies dans lesquelles la réticulation protéinique est importante. On peut également les utiliser pour traiter la maladie de Crohn, l'implantation tumorale, l'athérosclérose, la micro-angiopathie thrombotique, la croissance d'amas fibreux cutanés, l'acné, la formation de cicatrices, la glomérulonéphrite extra-membraneuse, les cataractes on encore l'infection par des nématodes microfilariens. Plus particulièrement on peut utiliser ces inhibiteurs pour réduire la stabilité des thrombi et les rendre plus sensibles à la lyse par des agents thrombolytiques.

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