Abstract: An object is to provide an antibody capable of specifically recognizing a human NRG1 protein isoform, and suppressing signal transduction in which the isoform is involved. An antibody capable of binding to a region at positions 221 to 234 of a human NRG1-? protein or an antibody capable of binding to a region at positions 213 to 239 of a human NRG1-?1 protein was successfully obtained. Further, it was also found that these antibodies had an activity of suppressing cleavage of the NRG1 protein, an activity of suppressing phosphorylation of an ErbB3 protein in a cancer cell, and an activity of suppressing in vivo tumor proliferation.

Abstract: An object is to provide an antibody capable of specifically recognizing a human NRG1 protein isoform, and suppressing signal transduction in which the isoform is involved. An antibody capable of binding to a region at positions 221 to 234 of a human NRG1-? protein or an antibody capable of binding to a region at positions 213 to 239 of a human NRG1-?1 protein was successfully obtained. Further, it was also found that these antibodies had an activity of suppressing cleavage of the NRG1 protein, an activity of suppressing phosphorylation of an ErbB3 protein in a cancer cell, and an activity of suppressing in vivo tumor proliferation.

Abstract: An object is to provide an antibody capable of specifically recognizing a human NRG1 protein isoform, and suppressing signal transduction in which the isoform is involved. An antibody capable of binding to a region at positions 221 to 234 of a human NRG1-? protein or an antibody capable of binding to a region at positions 213 to 239 of a human NRG1-?1 protein was successfully obtained. Further, it was also found that these antibodies had an activity of suppressing cleavage of the NRG1 protein, an activity of suppressing phosphorylation of an ErbB3 protein in a cancer cell, and an activity of suppressing in vivo tumor proliferation.

Abstract: A monoclonal antibody, which recognizes at least two amino acids among amino acids located at position 69, position 79, position 81 and position 102 of human midkine, has been found to have excellent reactivity with and excellent neutralizing activity against human midkine. Moreover, the activity of suppressing the proliferation of tumor has been observed in the antibody having excellent neutralizing activity. The use of the antibody of the present invention makes it possible to treat cancer effectively and to detect or purify midkine efficiently.

Abstract: An object is to provide an antibody capable of specifically recognizing a human NRG1 protein isoform, and suppressing signal transduction in which the isoform is involved. An antibody capable of binding to a region at positions 221 to 234 of a human NRG1-? protein or an antibody capable of binding to a region at positions 213 to 239 of a human NRG1-?1 protein was successfully obtained. Further, it was also found that these antibodies had an activity of suppressing cleavage of the NRG1 protein, an activity of suppressing phosphorylation of an ErbB3 protein in a cancer cell, and an activity of suppressing in vivo tumor proliferation.

Abstract: A monoclonal antibody, which recognizes at least two amino acids among amino acids located at position 69, position 79, position 81 and position 102 of human midkine, has been found to have excellent reactivity with and excellent neutralizing activity against human midkine. Moreover, the activity of suppressing the proliferation of tumor has been observed in the antibody having excellent neutralizing activity. The use of the antibody of the present invention makes it possible to treat cancer effectively and to detect or purify midkine efficiently.

Abstract: The present invention provides a method for testing mesothelioma comprising a step of determining a concentration of a human periostin protein in at least one type of sample of blood or pleural fluid of a subject. In the step of determining the concentration of human periostin protein, an antibody directed against human periostin protein may be used. The present invention further provides a kit for diagnosing mesothelioma, said kit comprising an antibody directed against human periostin protein. In the kit for diagnosing mesothelioma, the antibody directed against a human periostin protein may be an antibody that binds to a polypeptide consisting of an amino acid sequence set out in SE ID NO: 2.

Abstract: The present invention relates to an antibody or a fragment thereof which is capable of binding to a Frizzled homologue 10 (FZD10) protein, such as a mouse monoclonal antibody, a chimeric antibody and a humanized antibody. Also, the present invention relates to a method for treating and/or preventing FZD10-associated disease; a method for diagnosis or prognosis of FZD10-associated disease; and a method for in vivo imaging of FZD10 in a subject.