Novel haptotactic peptides

A - Human Necessities – 61 – K

Patent

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Details

A61K 38/00 (2006.01) A61K 38/03 (2006.01) A61K 38/10 (2006.01) C07K 5/00 (2006.01) C07K 7/00 (2006.01) C07K 14/75 (2006.01)

Patent

CA 2397833

Novel peptide sequences homologous to the known fibrinogen derived haptotactic peptides, C.beta. and C.alpha.E, are disclosed. The novel peptides are derived from proteins related or unrelated to fibrinogen including a peptide adjacent to fibrinogen .gamma.-chain C terminus denoted pre-C.gamma. as well as isotypes of angiopoietin, human microfibril-associated glycoprotein (mfap) and tenascins. Novel peptides having significant homology to the known fibrinogen derived haptotactic peptides are now shown to possess cell attraction activities. Active fragments comprising shorter 8-10 mer peptides are also disclosed, and shown to elicit significant haptotactic activity from a variety of cells, such as fibroblasts, endothelial and smooth muscle cells. The homologous peptides disclosed permit delineation of consensus sequences for haptotactic activity. The peptides are useful in pharmaceutical compositions alone or in conjunction with a medical device or implant.

Nouvelles séquences peptidiques homologues aux peptides haptotactiques connus dérivés du fibrinogène, C.beta. et C.alpha.E. Lesdits nouveaux peptides sont dérivés de protéines apparentées ou non apparentées au fibrinogène, dont un peptide adjacent à la terminaison de chaîne C du fibrinogène .gamma. désigné par pre-C.gamma., ainsi que des isotypes de l'angiopoïétine, de la glycoprotéine humaine associée aux microfibrilles (mfap) et des ténascines. De nouveaux peptides présentant une homologie considérable avec les peptides haptotactiques dérivés du fibrinogène se sont révélés posséder des activités d'attraction cellulaire. La présente invention concerne également des fragments actifs comportant des peptides plus courts possédant 8 à 10 mères qui se sont révélés induire une activité haptotactique considérable dans toute une gamme de cellules telles que les fibroblastes, les cellules endothéliales et les cellules des muscles lisses. Les peptides homologues décrits permettent la délimitation de séquences consensus pour l'activité haptotactique. Lesdits peptides sont utiles dans des compositions pharmaceutiques, seuls ou en combinaison avec un dispositif ou implant médical.

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