Toray Industries, Inc.

Takayoshi Ido

Fumiyoshi Okano

Takanori Saito

Shinichi Kobayashi

Yoshitaka Minamida

Masaki Shimizu

Yoshinori Narita

An antibody or a fragment thereof having immunoreactivity to a polypeptide comprising not less than 7 continuous amino acids in the CD179b protein, which was identified as a cancer antigen protein specifically expressed on the surfaces of cancer cells, can be used as a pharmaceutical composition for therapy and/or prophylaxis of cancer.

Pharmaceutical composition for treatment and prevention of cancer

The present invention relates to a pharmaceutical composition for treatment and/or prevention of cancer, which comprises, as an active ingredient, an antibody or fragment thereof having an immunological reactivity with a CAPRIN-1 protein or a fragment thereof comprising 7 or more consecutive amino acids.

Pharmaceutical composition for treatment and prevention of cancers

It is intended to provide a CAPRIN-1-targeting antibody superior in antitumor activity to conventional antibodies, and use thereof as a therapeutic and/or preventive agent for a cancer. The present invention provides an antibody targeting a CAPRIN-1 polypeptide specifically expressed on the surface of cancer cells, and use of the antibody as a therapeutic and/or preventive agent for a cancer. The present invention provides an antibody which comprises a heavy chain variable region comprising complementarity-determining regions of SEQ ID NOs: 1, 2, and 3 and a light chain variable region comprising complementarity-determining regions of SEQ ID NOs: 4, 5, and 6 and has immunological reactivity with a CAPRIN-1 protein, or a fragment thereof, and a pharmaceutical composition for the treatment and/or prevention of a cancer, comprising this antibody or fragment as an active ingredient.

Pharmaceutical composition for treatment and/or prevention of cancer

This invention relates to a method for detecting pancreatic cancer using novel tumor markers. Specifically, the invention provides a method for detecting pancreatic cancer comprising measuring the presence or an amount of a polypeptide having an reactivity of binding via an antigen-antibody reaction to an antibody against CAPRIN-1 protein in a sample separated from a subject, and to a reagent or kit for detecting pancreatic cancer comprising a CAPRIN-1 protein or a fragment thereof, an antibody against the same, or a polynucleotide encoding the same.

Method for detecting pancreatic cancer

This invention provides: a method for detecting a cancer, comprising measuring the expression of a polypeptide having binding reactivity through antigen-antibody reaction with an antibody against CAPRIN-1 having an amino acid sequence shown in any even-numbered SEQ ID NO shown in SEQ ID NOs: 2 to 30 in the Sequence Listing in a biological sample; a method for detecting a cancer which involves determining the presence and the amount of CAPRIN-1 in a sample of a cancer patient in order to determine the administration of a therapeutic drug targeting CAPRIN-1 to the cancer patient; and a drug and a kit for the diagnosis of a cancer, comprising an anti-CAPRIN-1 antibody.

Method for detecting CAPRIN-1 in a biological sample

This invention provides: a method for detecting a cancer, comprising measuring the expression of a polypeptide having binding reactivity through antigen-antibody reaction with an antibody against CAPRIN-1 having the amino acid sequence shown in any even-numbered SEQ ID NO of SEQ ID NOs: 2 to 30 in the Sequence Listing in a biological sample; a method for detecting a cancer which involves determining the presence and the amount of CAPRIN-1 in a sample of a cancer patient in order to determine the administration of a CAPRIN-1-targeting drug to the cancer patient; and a drug and a kit for the diagnosis of a cancer, comprising an anti-CAPRIN-1 antibody.

Method for detecting cancer via measurement of caprin-1 expression level

The invention provides an antibody targeting a cancer antigenic protein specifically expressed on the surface of cancer cells and use thereof in a therapeutic and/or preventive agent for cancer. Specifically, this invention provides an antibody or a fragment thereof which has immunological reactivity with a partial CAPRIN-1 polypeptide consisting of the amino acid sequence shown in SEQ ID NO: 5 or an amino acid sequence having 80% or higher sequence identity to the amino acid sequence, and a pharmaceutical composition for treatment and/or prevention of cancer, comprising the antibody or fragment thereof as an active ingredient.

Pharmaceutical composition for treatment of cancer comprising an anti-CAPRIN-1 peptide antibody

Provided is an antibody effective for treatment and/or prevention of gallbladder cancer. A pharmaceutical composition for treatment and/or prevention of gallbladder cancer contains as an active ingredient an antibody or a fragment thereof having immunological reactivity with a CAPRIN-1 protein or a fragment thereof comprising at least seven consecutive amino acid residues of the amino acid sequence of the protein.

Pharmaceutical composition for treatment and/or prevention of gallbladder cancer

Provided is an antibody effective for treatment and/or prevention of liver cancer. A pharmaceutical composition for treatment and/or prevention of liver cancer contains as an active ingredient an antibody or a fragment thereof having immunological reactivity with a CAPRIN-1 protein or a fragment thereof comprising at least seven consecutive amino acid residues of the amino acid sequence of the protein.

Pharmaceutical composition for treatment and/or prevention of liver cancer

This invention relates to a medicament for treating and/or preventing a cancer, comprising a combination of an antibody against a cancer antigen CAPRIN-1 protein that is specifically expressed on the surface of the cancer cell, and an antitumor agent, wherein the antibody and the antitumor agent are combined together or separately, and to a use of the medicament.

Medicament for treating and/or preventing cancer

According to the present invention, a cancer antigen protein to be specifically expressed on the surfaces of cancer cells is identified and thus the use of an antibody targeting the cancer antigen protein as an agent for treating and/or preventing a cancer is provided. Specifically, the present invention provides a pharmaceutical composition for treating and/or preventing a cancer, which comprises an antibody or a fragment thereof as an active ingredient having immunological reactivity to a partial polypeptide of CAPRIN-1, which is represented by any of even-numbered sequences of SEQ ID NOS: 2 to 30, wherein the polypeptide has the amino acid sequence represented by SEQ ID NO: 37 or an amino acid sequence having 80% or more sequence identity with the amino acid sequence.

Growing community of inventors

Kanagawa, Japan

Takayoshi Ido