Lysozyme fusion proteins in infections

C - Chemistry – Metallurgy – 12 – N

Patent

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Details

C12N 15/56 (2006.01) A01K 67/027 (2006.01) A61K 38/47 (2006.01) A61P 11/00 (2006.01) A61P 31/04 (2006.01) C07K 14/47 (2006.01) C12N 9/36 (2006.01) C12N 15/12 (2006.01) C12N 15/62 (2006.01) A61K 38/00 (2006.01)

Patent

CA 2349837

A method and composition for prophylaxis and/or therapeutic treatment of bacterial infections, particularly respiratory bacterial infections. A fusion protein of lysozyme and the carboxyl terminal propeptide of surfactant protein- B (SP-B) with the preceding ten amino acids of the mature SP-B peptide, or recombinant lysozyme alone, is administered in a pharmaceutically acceptable medium to an individual. The fusion protein or recombinant lysozyme may be selected so as to deliver it to a target infection site, such as the lungs or gastrointestinal tract. The method and composition eliminates problems associated with conventional antibiotic treatments, such as inefficacy and promotion of antibiotic resistant bacterial strains.

La présente invention concerne une méthode et une composition destinées au traitement prophylactique et curatif d'infections bactériennes, en particulier au niveau des voies respiratoires. Une protéine de fusion de lysozyme et du propeptide C-terminal de la protéine tensioactive B (SP-B) avec les dix acides aminés précédents du peptide SP-B mature, ou le lysozyme recombinant seul, est administré à un patient via un support acceptable au plan pharmaceutique. La protéine de fusion seule ou le lysoszyme recombinant peut être sélectionné de manière à pouvoir être administré sur un site d'infection cible, tel que les poumons ou l'appareil gastro-intestinal. Ce procédé et cette composition permettent d'éviter certains problèmes associés à des traitements antibiotiques classiques, tels que la perte d'efficacité ou le développement de souches bactériennes résistant aux antibiotiques.

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