The lectin-like domain of thrombomodulin and its therapeutic...

C - Chemistry – Metallurgy – 12 – N

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C12N 15/12 (2006.01) A61K 38/36 (2006.01) C07K 14/745 (2006.01) A61K 38/00 (2006.01)

Patent

CA 2447629

In the present invention the in vivo role of the N-terminal lectin-like domain of thrombomodulin was studied by using homologous recombination in murine ES cells to create mutant mice that lack this region of thrombomodulin. Phenotypic analysis shows that said mice respond identically to their wild type littermates following pro-coagulant challenges meaning that the protein C pathway is not altered by the mutation. However, following several inflammatory stimuli, it was observed that the mutant mice showed an elevated neutrophil extravasation in several organs. In the present invention it is found that leukocyte adhesion could be abrogated by addition of recombinant lectin-domain meaning that said domain has direct anti-inflammatory properties which means that the lectin-like domain can be used to manufacture a medicament useful for the treatment of a variety of inflammatory disease processes.

Dans cette invention, on a étudié le rôle in vivo du domaine de type lectine à terminaison N de la thrombomoduline par recombinaison homologue dans des cellules murines ES de façon à créer des souris mutantes absentes de cette région de la thrombomoduline. Une analyse phénotypique indique que ces souris répondent de manière identique à leurs compagnons de portée de type sauvage après des test de provocation pro-coagulants signifiant que le mécanisme d'action de la protéine C n'est pas modifié par la mutation. Toutefois, après plusieurs stimuli inflammatoires, il s'avère que les souris mutantes présentent une extravasation neutrophile élevée dans plusieurs organes. Dans cette invention, il s'avère que l'adhésion leucocytaire pourrait être abrogée par l'addition du domaine de recombinaison de type lectine signifiant que le domaine a des propriétés anti-inflammatoires directes qui signifient que le domaine de type lectine peut être utilisé pour fabriquer un médicament utile dans le traitement de différents processus inflammatoires.

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