Broad spectrum pyrogenic exotoxins antagonists and vaccines

C - Chemistry – Metallurgy – 07 – K

Patent

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Details

C07K 14/31 (2006.01) A61K 38/16 (2006.01) A61K 39/085 (2006.01) C07K 14/315 (2006.01) C07K 16/12 (2006.01) G01N 33/569 (2006.01) G01N 33/68 (2006.01) A61K 39/00 (2006.01)

Patent

CA 2276112

The invention relates to peptides comprising an amino acid sequence substantially homologous to the amino sequence of a fragment of a pyrogenic exotoxin, and functional derivatives of said peptides, capable of eliciting protective immunity against toxic shock induced by a pyrogenic exotoxin or by a mixture of pyrogenic exotoxins. Preferred peptides comprise an amino acid sequence substantially homologous to the amino sequence of a fragment of Staphylococcal aureus enterotoxin B (SEB). The invention also relates to broad spectrum pharmaceutical compositions for the treatment or short term prophylaxis of toxin-mediated activation of T cells, comprising as active ingredient at least one peptide according to the invention or derivative thereof, and to broad spectrum vaccines for conferring long term immunity against toxic shock induced by at least one pyrogenic exotoxin are provided. The vaccines comprising as active ingredient at least one peptide according to the invention, or derivative thereof.

L'invention porte sur des peptides comprenant une séquence d'acides aminés sensiblement homologue à la séquence d'acides aminés d'un fragment d'exotoxine pyrogène et des dérivés fonctionnels de ces peptides capables de créer une immunité protectrice contre les chocs toxiques induits par une exotoxine pyrogène ou par un mélange d'exotoxines pyrogènes. Des peptides préférés comprennent une séquence d'acides aminés sensiblement homologue à la séquence d'acides aminés d'un fragment d'entérotoxine B Staphylococcus aureus. L'invention porte également sur des compositions pharmaceutiques à large spectre destinées au traitement ou à la prophylaxie à court terme de l'activation des lymphocytes T induite par les toxines, ces compositions comprenant comme ingrédient actif au moins un peptide de l'invention ou un dérivé de celui-ci, et sur des vaccins à large spectre conférant une immunité à long terme contre le choc toxique induit par au moins une exotoxine pyrogène. Ces vaccins comprennent comme ingrédient actif au moins un peptide de l'invention ou un dérivé de celui-ci.

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