Abstract: A method for purifying and enriching mesenchymal stem cells (MSCs) simply and efficiently. Separation of cells expressing CD73 protein on the surface from fresh tissue isolated from a living body allows purification and enrichment of MSCs easily and efficiently. MSCs may be selectively isolated with a single antibody before culturing to establish a culture system of mesenchymal stem cells that enhances the engraftment efficiency in the transplanted site.

Abstract: A method for determining a prognosis of idiopathic pulmonary fibrosis, comprising the following steps (a) to (c): (a) a step of detecting an amount of at least one protein selected from S100A4, CIRP, and 14-3-3? for a biological sample separated from the test subject; (b) a step of comparing the amount of the protein detected in the step (a) with a standard amount of the protein; and (c) a step of determining that the prognosis of idiopathic pulmonary fibrosis of the test subject is poor in a case where as a result of the comparison in the step (b), the amount of the protein in the test subject is higher than the standard amount.

Abstract: The object is to provide a tumor antigen peptide that is specifically presented on a cancer and a cancer stem cell, and a pharmaceutical composition, etc. that is useful for the prevention and/or treatment of a cancer and contains the above peptide as an active ingredient. The above object has been accomplished by providing a BORIS-derived partial peptide belonging to isoform A or C or subfamily 5 or 6, a polynucleotide encoding the peptide, a pharmaceutical composition containing the above as an active ingredient, and an agent for the prevention and/or treatment of a cancer, the agent containing the above as an active ingredient and inducing CTLs.

Abstract: A method for determining an interaction between a first protein and a second protein comprises the steps of: expressing in a cell or introducing into a cell a first fusion protein comprising the first protein, a multimerizable protein, and a fluorescent protein, and a second fusion protein comprising the second protein and a multimerizable protein; detecting a fluorescent focus formed by an association between the first fusion protein and the second fusion protein in the cell; and determining an interaction between the first protein and the second protein according to the detection of the fluorescent focus.

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 method has been developed to efficiently proliferate and culture a CTL specific to WT1 peptides under limiting dilution conditions. Utilizing this method, CTLs capable of recognizing both a state where a wildtype WT1 specific peptide is presented by HLA-A*24:02 and a state where a mutant WT1 specific peptide is presented by HLA-A*24:02 have been successfully obtained.

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 object is to provide a tumor antigen peptide that is specifically presented on a cancer and a cancer stem cell, and a pharmaceutical composition, etc. that is useful for the prevention and/or treatment of a cancer and contains the above peptide as an active ingredient. The above object has been accomplished by providing a BORIS-derived partial peptide belonging to isoform A or C or subfamily 5 or 6, a polynucleotide encoding the peptide, a pharmaceutical composition containing the above as an active ingredient, and an agent for the prevention and/or treatment of a cancer, the agent containing the above as an active ingredient and inducing CTLs.

Abstract: A method for detecting an interaction between a first protein and a second protein comprises the steps of: expressing in a cell a first fusion protein comprising the first protein and an association-inducing protein, and a second fusion protein comprising the second protein and a fluorescent protein having a multimerization ability; detecting a fluorescent focus formed by an association between the first fusion protein and the second fusion protein in the cell; and determining an interaction between the first protein and the second protein according to the detection of the fluorescent focus.

Abstract: A method for determining an interaction between a first protein and a second protein comprises the steps of: expressing in a cell or introducing into a cell a first fusion protein comprising the first protein, a multimerizable protein, and a fluorescent protein, and a second fusion protein comprising the second protein and a multimerizable protein; detecting a fluorescent focus formed by an association between the first fusion protein and the second fusion protein in the cell; and determining an interaction between the first protein and the second protein according to the detection of the fluorescent focus.

Abstract: A method for detecting an interaction between a first protein and a second protein comprises the steps of: expressing in a cell a first fusion protein comprising the first protein and an association-inducing protein, and a second fusion protein comprising the second protein and a fluorescent protein having a multimerization ability; detecting a fluorescent focus formed by an association between the first fusion protein and the second fusion protein in the cell; and determining an interaction between the first protein and the second protein according to the detection of the fluorescent focus.

Abstract: A method for detecting an interaction between a first protein and a second protein comprises the steps of: expressing in a cell a first fusion protein comprising the first protein and an association-inducing protein, and a second fusion protein comprising the second protein and a fluorescent protein having a multimerization ability; detecting a fluorescent focus formed by an association between the first fusion protein and the second fusion protein in the cell; and determining an interaction between the first protein and the second protein according to the detection of the fluorescent focus.

Abstract: From PBMCs of patients infected with H1N1pdm, three human monoclonal antibodies have been obtained which are capable of binding to an epitope present at residues 40 to 58 in an HA2 region of a hemagglutinin protein derived from H1N1pdm. Further, these antibodies have been found to also have a neutralization activity against subtype H1 and subtype H5 of group 1 influenza A viruses. On the other hand, the three antibodies have also been found to exhibit neither a binding ability nor a neutralization activity against subtype H2 which belongs to the group 1, but in the HA2 region derived from H1N1pdm of which the amino acid at residue 45 is substituted with phenylalanine and the amino acid at residue 47 is substituted with glycine.

Abstract: An object is to find a target molecule effective for cancer treatments and the like and to provide an antibody capable of specifically binding to the molecule, an anticancer agent comprising the antibody as an active ingredient, and so forth. Hence, prostate cancer cell lines (LNCaP-CR cells and LNCaP cells) were compared by SST-REX, and CXADR was identified as a molecule involved in tumor formation and so on. Then, a monoclonal antibody against CXADR was prepared, and the anti-cancer activity, ADCC activity, CDC activity, and so forth were examined. The result revealed that an antibody capable of binding to an epitope present at positions 181 to 230 of a CXADR protein derived from human exhibited an anti-cancer activity against prostate cancer cells, pancreatic cancer cells, and colorectal cancer cells. Further, it was also revealed that the antibody had an ADCC activity and a CDC activity. Moreover, the structures of light chain and heavy chain variable regions of the antibody were successfully determined.

Abstract: Two types of antibodies (35-1 antibody and 292 antibody) capable of binding to phenylalanine at position 115, isoleucine at position 117, glycine at position 140, glutamic acid at position 141, and arginine at position 142 of a human HB-EGF protein were successfully obtained. Then, it was also found that these antibodies had an activity of suppressing cleavage of the human HB-EGF protein, and an activity of suppressing EGFR phosphorylation that would occur when the human HB-EGF bound to the EGFR. Further, determined were amino acid sequences of light chain and heavy chain variable regions of these antibodies and sequences of CDRs of each of the variable regions.

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: Materials and methods are provided for treating influenza B infections in humans. Anti-human influenza virus monoclonal antibodies and antigen-binding fragments thereof having a neutralization activity against a human influenza B virus are provided. Methods for producing anti-human influenza B virus monoclonal antibodies are also provided. The antibodies and antigen-binding fragments thereof can be effective against a wide range of influenza B viral strains. Methods of inhibiting or treating a human influenza B infection are provided. The anti-influenza B therapeutics can also be used to manufacture medicaments effective against influenza B infections, to detect human influenza B in a human subject, for use in pharmaceutical compositions, and for use in kits for at least one of the prevention, the treatment, and the detection of human influenza B in a human subject.

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.