Polypeptides derived from inducible hsp70 and pharmaceutical...

C - Chemistry – Metallurgy – 07 – K

Patent

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Details

C07K 14/47 (2006.01) C12N 5/0783 (2010.01) A61K 38/08 (2006.01) A61K 38/17 (2006.01) A61K 39/00 (2006.01) A61P 31/12 (2006.01) A61P 35/00 (2006.01) C07K 7/06 (2006.01) C12N 15/63 (2006.01)

Patent

CA 2461254

The invention relates to a peptide comprising an amino acid sequence of at least 8 contiguous amino acids, said amino acid sequence being at least 65% identical to a portion of the same length within the amino acid sequence of inducible Hsp70, characterized in that the peptide amino acid sequence differs from any amino acid sequence of the same length of the constitutive Hsc70 amino acid sequence by at least one amino acid, and that said peptide is able to induce in vitro or in vivo cytotoxic T lymphocytes able to specifically recognize cells naturally producing inducible Hsp70, said cytotoxic T lymphocyteS being able to recognize bath mutated and non mutated Hsp70 epitopes but not Hsc70 epitopes.

La présente invention concerne un peptide comprenant une séquence d'acides aminés d'au moins 8 acides aminés contigus, cette séquence étant au moins identique à 65 % à une partie de même longueur dans la séquence d'acides aminés d'Hsp70 inductibles. L'invention a pour caractéristique, d'une part de présenter une différence d'au moins un acide aminé entre sa séquence d'acides aminés du peptide et n'importe quelle séquence d'acides aminés de même longueur de la séquence d'acides aminés constitutifs du Hsc70, et d'autre part d'être capable d'induire in vitro ou in vivo des lymphocytes T cytotoxiques capables de reconnaître de façon spécifique des cellules produisant naturellement le Hsp70 inductible, lesdits lymphocytes T cytotoxiques étant capables de reconnaître les épitopes des Hsp70 avec ou sans mutation, mais pas les épitopes des Hsc70.

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