Hybridoma and anti-kc-4 humanized monoclonal antibody, dna...

C - Chemistry – Metallurgy – 12 – N

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C12N 5/16 (2006.01) A61K 39/395 (2006.01) A61K 49/00 (2006.01) A61K 51/10 (2006.01) C07K 16/30 (2006.01) C07K 16/46 (2006.01) C12N 5/10 (2006.01) C12N 15/13 (2006.01) G01N 33/574 (2006.01) G01N 33/577 (2006.01)

Patent

CA 2173324

An anti-KC-4 humanized monoclonal antibody that comprises the variable regions of the light and heavy chains of the anti-KC-4 murine antibody, wherein the light chain has 7 amino acids and the heavy chain has 12 amino acids of the framework regions substituted with amino acid present in equivalent positions in antibodies of a species other than murine, and the constant regions of a human antibody. The antibody may be labeled and/or glycosylated, and is presented as a composition with a carrier. The anti-KC-4 monoclonal antibody is used in diagnostic kits for cancer and in in vivo methods of imaging and treating a primary or metastisized cancer, and in vitro diagnosis and ex vivo purging neoplastic cells from a biological fluid. RNAs and DNAs encode the monoclonal antibody, and a hydrid vector carrying the nucleotides and transfected cells express the peptides.

L'invention concerne un anticorps monoclonal humanisé anti KC-4 comprenant les régions variables des chaînes lourdes et légères de l'anticorps murin anti KC-4, la chaîne légère présentant 7 acides aminés et la chaîne lourde 12 acides aminés des régions squelettes substituées avec l'acide aminé présent en positions équivalentes dans les anticorps d'une espèce autre que murine, et les régions constantes d'un anticorps humain. Ledit anticorps peut être marqué et/ou glycosylé et peut se présenter sous forme de composition contenant un véhicule. Ledit anticorps monoclonal anti KC-4 est utilisé dans des trousses de diagnostic du cancer et dans les procédés in vivo d'imagerie et de traitement d'un cancer primitif ou métastasé, ainsi que le diagnostic in vitro et la purge ex vivo de cellules néoplasiques dans un liquide biologique. Des ARN et ADN codent l'anticorps monoclonal, et un vecteur hybride portant les nucléotides et des cellules transfectées expriment les peptides.

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