Lytic peptides

C - Chemistry – Metallurgy – 07 – K

Patent

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Details

C07K 14/435 (2006.01) A61K 38/17 (2006.01) A61K 47/48 (2006.01) C07K 14/00 (2006.01) G01N 33/543 (2006.01) A61K 38/00 (2006.01)

Patent

CA 2248782

The invention provides a peptide with lytic activity, having an amphipathic .alpha.-helix of sufficient length and character to allow the peptide to function lytically, wherein the N-terminal and/or C-terminal of said peptide comprises one or more moieties which result in an increased positive charge compared to the charge of a peptide of identical amino acid sequence and structure but not comprising said moiety. Methods of activation to provide activity and for inactivation of lytic activity, pharmaceutical compositions, and methods of treatment are described.

L'invention concerne un peptide à activité lytique, ayant une hélice .alpha. amphiphatique d'une longueur suffisante et d'une nature appropriée, pour permettre au peptide d'avoir une activité lytique. L'extrémité N-terminale et/ou l'extrémité C-terminale de ce peptide comprend un ou plusieurs groupes qui produisent une augmentation de la charge positive du peptide par rapport à la charge du peptide ayant la même séquence d'aminoacides et la même structure, mais ne comprenant pas ce ou ces groupes. L'invention concerne, également, des procédés d'activation et d'inactivation de la fonction lytique, des compositions pharmaceutiques et des méthodes de traitement.

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