Therapeutic peptides having a motif that binds specifically...

C - Chemistry – Metallurgy – 07 – K

Patent

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Details

C07K 14/415 (2006.01) A61K 38/16 (2006.01) A61P 35/00 (2006.01) C12N 15/29 (2006.01) A61K 38/00 (2006.01)

Patent

CA 2404100

The present invention describes a composition of matter comprising a conserved structural motif that allows the targeting and binding of a chromatin binding protein to non-acetylated histone H3 and H4 and prevents their acetylation. This invention is responsible for the anti-carcinogenic property of a chromatin binding peptide isolated from soybean seed. This structural motif is found in a highly conserved manner in other chromatin-binding proteins from different species. Modifications to this structural motif such as fusions to other proteins with functional motifs and amino acid substitutions have potential therapeutic applications and can be developed as an in vivo gene silencing technology for biological and medical research. In particular, active fragments of the lunasin peptide and active analogs of the lunasin peptide are useful in this invention. Pharmaceutical compositions useful in retarding or stopping or reducing various types of cancers are described.

La présente invention concerne une composition renfermant un motif structurel conservé qui permet le ciblage et la liaison entre une protéine qui se lie à la chromatine et des histones H3 et H4 non acétylés, et qui empêche l'acétylation desdits histones. Cette invention porte sur la découverte de la propriété anti-cancéreuse d'un peptide isolé à partir de la graine de soja, qui se lie à la chromatine. Ce motif structurel se trouve fortement conservé dans d'autres protéines qui se lient à la chromatine de diverses espèces. Certaines modifications de ce motif structurel telles que des fusions avec d'autres protéines à motifs fonctionnels ou des substitutions d'acides aminés présentent des applications thérapeutiques potentielles et peuvent être développées sous forme de technologie d'inhibition de gènes in vivo aux fins de la recherche biologique et médicale. Certains fragments actifs du peptide de lunasine et certains analogues actifs dudit peptide sont utiles dans le cadre de cette invention. Sont également décrites des compositions pharmaceutiques capables de ralentir, d'arrêter ou d'atténuer divers types de cancer.

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