Humanized anti-tag-72 cc49 for diagnosis and therapy of...

C - Chemistry – Metallurgy – 07 – K

Patent

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C07K 16/46 (2006.01) A61K 39/395 (2006.01) A61K 49/00 (2006.01) A61K 51/00 (2006.01) A61K 51/10 (2006.01) A61P 35/00 (2006.01) C07K 16/30 (2006.01) C12N 15/13 (2006.01) G01N 33/574 (2006.01)

Patent

CA 2490659

The present disclosure provides humanized CC49 monoclonal antibodies that bind TAG-72 with high binding affinity and that are minimally immunogenic. In one embodiment, a humanized CC49 antibody includes a non-conservative amino acid substitution in a light chain complementarity determining region 3 of the CC49 antibody. In a further embodiment, the humanized CC49 antibody includes a non- conservative substitution of a first residue in a light chain complementarity determining region 3 and a substitution of a second residue in a complementarity determining region of the humanized CC49 antibody. In several of the embodiments, methods are disclosed for the use of a humanized CC49 antibody in the detection or treatment of a tumor in a subject. Also disclosed is a kit including the humanized CC49 antibody described herein.

L'invention porte sur les anticorps monoclonaux humanisés CC49 se fixant au TAG-72 avec une grande affinité, tout en étant très faiblement immunogènes. Dans une exécution, l'anticorps humanisé CC49 comporte une substitution acide amino non conservatrice dans une chaîne légère, déterminant par complémentarité la région 3 de l'anticorps CC49. Dans une autre exécution, l'anticorps humanisé CC49 comporte une substitution non conservatrice d'un premier résidu dans une chaîne légère déterminant par complémentarité la région 3, ainsi qu'une substitution d'un deuxième résidu d'une région déterminant par complémentarité la région de l'anticorps humanisé CC49. Plusieurs des exécutions, recourent à des méthodes utilisant l'anticorps humanisé CC49 pour le traitement et la détection de tumeurs. L'invention porte également sur une trousse conprenant l'anticorps CC49.

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