Kyowa Hakko Kirin Co., Limited

Mariko Nakano

Hiroshi Ando

Tsuguo Kubota

Munetoshi Ando

Naoya Kameyama

Kazuyasu Nakamura

So Ohta

Masayo Suzuki

Shinobu Kawamoto

The present invention provides an anti-human FOLR1 antibody against diseases associated with human FOLR1-expressing cells, which specifically recognizes and binds to an amino acid sequence of human FOLR1 or a conformational structure thereof and also has a high effector activity such as antibody-dependent cellular cytotoxicity activity (ADCC activity). The present invention can provide a monoclonal antibody which specifically recognizes and binds to the amino acid sequence of human FOLR1 or the conformational structure thereof and also has ADCC activity and CDC activity, or an antibody fragment thereof, a DNA encoding the antibody, a vector comprising the DNA, a transformant obtained by introducing the vector, a method for producing the antibody or the antibody fragment thereof using the transformant, and a therapeutic agent and a diagnostic agent comprising the antibody or the antibody fragment as an active ingredient.

Anti-FOLR1 antibody

An object of the present invention is to provide a monoclonal antibody which is useful as a diagnostic agent or a therapeutic agent for a disease relating to a polypeptide encoded by Claudin-4 (hereinafter referred to as 'CLDN4') gene or a polypeptide encoded by a Claudin-3 (hereinafter referred to as 'CLDN3') gene, or a method for using the same. Accordingly, the present invention provides a monoclonal antibody or an antibody fragment thereof, which specifically recognizes three-dimensional structure of an extracellular region of CLDN4 and binds to the extracellular region; a monoclonal antibody or an antibody fragment thereof, which specifically recognizes three-dimensional structure of both of extracellular regions of CLDN3 and CLDN4 and binds to the extracellular regions; a hybridoma which produces the antibody; a DNA which encodes the antibody; a vector which comprises the DNA; a transformant obtained by transforming the vector; a process for producing an antibody or an antibody fragment thereof using the hybridoma or the transformant; and a diagnostic agent or a therapeutic agent for a disease relating to a polypeptide encoded by CLDN4 gene and/or CLDN3 gene using the antibody or the antibody fragment.

Anti-claudin-4 antibody

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Tokyo, Japan

Mariko Nakano