Mammalian-derived peptides for the treatment of microbial...

C - Chemistry – Metallurgy – 07 – K

Patent

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Details

C07K 14/805 (2006.01) A01N 63/02 (2006.01) A61K 38/42 (2006.01) A61L 2/00 (2006.01) A61L 2/18 (2006.01) A61K 38/00 (2006.01)

Patent

CA 2309554

The present invention provides compositions useful as antimicrobial agents which include mammalian hemoglobin, the .alpha. and .beta. chains of hemoglobin free of heme, fragments of the .alpha. and .beta. chains that result from cyanogen bromide cleavage of the .alpha. and .beta. chains, and synthetic peptides derived therefrom. The compositions exert antimicrobial activity against both bacteria and fungi that is comparable to known antimicrobial peptides from human neutrophils, cathepsin G and azurocidin. Sensitive organisms include Gram-negative bacteria such as Escherichia coli and Pseudomonas aeruginosa, Gram-positive bacteria such as Staphylococcus aureus and Streptococcus faecalis, and the fungus Candida albicans. Methods for preparing the compositions also are provided.

Cette invention se rapporte à des compositions utiles comme agents antimicrobiens, qui contiennent de l'hémoglobine de mammifères, les chaînes .alpha. et .beta. d'hémoglobine exemptes d'hème, des fragments de ces chaînes .alpha. et .beta. qui résultent du clivage au bromure de cyanogène de ces chaînes .alpha. et .beta., et des peptides synthétiques dérivés de celles-ci. Ces compositions exercent à la fois contre les bactéries et les champignons une activité antimicrobienne qui est comparable à celle produite par les peptides antimicrobiens des neutrophiles humains de la cathepsine G et de l'azurocidine. Les organismes sensibles à ces compositions sont notamment les bactéries Gram négatif, telles que Escherichia coli et Pseudomonas aeruginosa, les bactéries Gram positif telles que Staphylococcus aureus et Streptococcus faecalis, et le champignon Candida albicans. Des procédés de préparation de ces compositions sont également présentés.

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