Carbohydrate epitope mimic peptides and uses thereof

C - Chemistry – Metallurgy – 07 – K

Patent

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Details

C07K 7/08 (2006.01) A61P 25/28 (2006.01) C07K 5/10 (2006.01) C07K 7/06 (2006.01) C12N 15/62 (2006.01) G01N 33/68 (2006.01)

Patent

CA 2363601

This invention provides carbohydrate epitope mimic compounds, particularly peptides, and analogs and variants thereof. In particular, the compounds and peptides of the present invention mimic the carbohydrate epitope GlcA.beta.1→3Gal.beta.1→4GlcNAc or sulfate - 3GlcA.beta.1→3Gal.beta.1→4GlcNAc, or the L2/HNK1 carbohydrate epitope. This invention provides an isolated peptide comprising an amino acid sequence of a carbohydrate epitope mimic peptide in which the amino acid sequence is set forth in any of SEQ ID NOS: 1-8, 27-38, 39, 40 and 41, including variants, analogs and active fragments thereof. The invention further provides an isolated nucleic acid encoding a peptide comprising an amino acid sequence of a carbohydrate epitope mimic peptide. This invention provides pharmaceutical compositions and diagnostic and therapeutic methods of use of the isolated polypeptides and nucleic acids, particularly in modulating or mediating cell-cell adhesion and viral infection and the processes and events mediated thereby. Assays for compounds which mimic, alter or inactivate the polypeptides of the present invention for use in therapy are also provided.

L'invention concerne des composés mimétiques d'épitope glucidique, notamment des peptides, et des analogues et variants dérivés. Plus précisément, les composés et les peptides de la présente invention imitent l'épitope glucidique GlcA.beta.1→3Gal.beta.1→4GlcNAc ou le sulfate - 3GlcA.beta.1→3Gal.beta.1→4GlcNAc, ou L2/HNK1 épitope glucidique. Ladite invention concerne un peptide isolé contenant une séquence d'acide aminé d'un peptide mimétique d'épitope glucidique, dans lequel la séquence d'acide aminé est exposée dans n'importe quelles des SEQ ID NOS: 1-8, 27-38, 39, 40 et 41, y compris les variants, les analogues et les fragments actifs correspondants. Cette invention concerne, en outre, un acide nucléique isolé codant un peptide contenant une séquence d'acide aminé d'un peptide mimétique d'épitope glucidique. Ladite invention a trait à des compositions pharmaceutiques et à des méthodes diagnostiques et thérapeutiques d'utilisation des polypeptides isolés et des acides nucléiques, notamment de modulation et de médiation de l'adhésion intercellulaire et de l'infection virale, et aux processus et aux faits ainsi médiés. Cette invention porte également sur des dosages pour composés qui imitent, modifient ou inactivent les polypeptides de la présente invention, et qui sont utilisés en thérapie.

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