Antibody to human gastrointestinal epithelial tumor antigen...

C - Chemistry – Metallurgy – 07 – K

Patent

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Details

C07K 16/30 (2006.01) A61K 39/00 (2006.01) C07K 16/14 (2006.01) C07K 16/28 (2006.01) G01N 33/574 (2006.01)

Patent

CA 2386926

An antibody, or a derivate or a fragment thereof, having a binding structure for a target structure is described. The antibody is displayed in, and on the cell surface of, human gastrointestinal epithelial tumour cells and in a subpopulation of normal human gastrointestinal epithelial cells. Said binding structure comprises the complementarity determining region (CDR) sequences in the light chain comprising essentially the amino acids number 23-33 (CDR1), 49- 55 (CDR2), 88-98 (CDR3) of the amino acid sequence shown in SEQ ID NO:2, and the CDR sequences in the heavy chain comprising essentially the amino acids number 158-162 (CDR1), 177-193 (CDR2), 226-238 (CDR3) of the amino acid sequence shown in SEQ ID NO:2, or other binding structures with similar unique binding properties. There is also described a target structure displayed in, or on the surface of tumour cells, vaccine compositions, pharmaceutical compositions as well as methods related to human malignant diseases.

La présente invention concerne un anticorps, l'un de ses dérivés ou l'un de ces fragments, présentant une structure de liaison convenant à une structure cible. Cet anticorps apparaît dans ou à la surface des cellules tumorales de l'épithélium gastro-intestinal humain et dans une sous-population de cellules normales de l'épithélium gastro-intestinal humain. Cette structure de liaison comprend les séquences de CDR (régions déterminantes de complémentarité) de la chaîne légère constituée essentiellement des acides aminés n· 23-33 (CDR1), 49-55 (CDR2) et 88-98 (CDR3) de la séquence d'acides aminés de SEQ ID NO:2, et les séquences CDR de la chaîne lourde constituée essentiellement des acides aminés n· 158-162 (CDR1), 177-193 (CDR2) et 226-283 (CDR3) de la séquence d'acides aminés de SEQ ID NO:2, ou d'autres structures de liaison présentant des propriétés semblables de liaison unique. L'invention concerne également une structure cible apparaissant dans ou à la surface de cellules tumorales, un vaccin, des compositions, des compositions pharmaceutiques, ainsi que des procédés se rapportant aux affections malignes humaines.

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