Abstract: Provided is a megakaryocyte and/or platelet production method, enabling to produce a megakaryocyte and/or platelet from mesenchymal cells such as preadipocytes in a relatively short period of time, simply, in a large amount and at lower cost or more efficiently in vitro and a method for producing TPO simply and in a larger amount. A first invention is a method for producing a megakaryocyte and/or platelet, comprising culturing a mesenchymal cell in a mesenchymal cell culturing basic medium containing an iron ion and an iron transporter and collecting megakaryocytes and/or platelets from a culture. A second invention is a method for producing thrombopoietin, comprising culturing a mesenchymal cell or mesenchymal cell-derived megakaryocyte in a mesenchymal cell culturing basic medium containing an iron ion and an iron transporter and collecting thrombopoietin from a culture.

Abstract: Provided is a megakaryocyte and/or platelet production method, enabling to produce a megakaryocyte and/or platelet from mesenchymal cells such as preadipocytes in a relatively short period of time, simply, in a large amount and at lower cost or more efficiently in vitro and a method for producing TPO simply and in a larger amount. A first invention is a method for producing a megakaryocyte and/or platelet, comprising culturing a mesenchymal cell in a mesenchymal cell culturing basic medium containing an iron ion and an iron transporter and collecting megakaryocytes and/or platelets from a culture. A second invention is a method for producing thrombopoietin, comprising culturing a mesenchymal cell or mesenchymal cell-derived megakaryocyte in a mesenchymal cell culturing basic medium containing an iron ion and an iron transporter and collecting thrombopoietin from a culture.

Abstract: Provided is a megakaryocyte and/or platelet production method, enabling to produce a megakaryocyte and/or platelet from mesenchymal cells such as preadipocytes in a relatively short period of time, simply, in a large amount and at lower cost or more efficiently in vitro and a method for producing TPO simply and in a larger amount. A first invention is a method for producing a megakaryocyte and/or platelet, comprising culturing a mesenchymal cell in a mesenchymal cell culturing basic medium containing an iron ion and an iron transporter and collecting megakaryocytes and/or platelets from a culture. A second invention is a method for producing thrombopoietin, comprising culturing a mesenchymal cell or mesenchymal cell-derived megakaryocyte in a mesenchymal cell culturing basic medium containing an iron ion and an iron transporter and collecting thrombopoietin from a culture.

Abstract: Disclosed are: a method for using a particular microRNA as a biomarker for head-and-neck tumor; a method for the determination of head-and-neck tumor; a kit for the determination of head-and-neck tumor, and the like. The present invention is characterized in that at least one microRNA selected from the group of microRNAs consisting of miR-455-3p, miR-455-5p, miR-130b, miR-130b*, miR-801, miR-196a, miR-21, miR-31, miR-133b, miR-145 and miR-375 is used as a biomarker for head-and-neck tumor.

Abstract: It is to provide a novel head-and-neck tumor proliferation inhibitor, head-and-neck tumor metastasis inhibitor and pharmaceutical composition for treating a head-and-neck tumor. The present invention is characterized by using an inhibitory substance of a microRNA whose expression increases in a head-and-neck tumor and/or a promoting substance of a microRNA whose expression decreases in a head-and-neck tumor. Preferred examples of the microRNA whose expression increases in a head-and-neck tumor include miR-455-3p, miR-455-5p, miR-130b, miR-130b*, miR-801, miR-196a, miR-21 and miR-31. Preferred examples of the microRNA whose expression decreases in a head-and-neck tumor include miR-133b, miR-145 and miR-375.

Abstract: It is to provide a novel head-and-neck tumor proliferation inhibitor, head-and-neck tumor metastasis inhibitor and pharmaceutical composition for treating a head-and-neck tumor. The present invention is characterized by using an inhibitory substance of a microRNA whose expression increases in a head-and-neck tumor and/or a promoting substance of a microRNA whose expression decreases in a head-and-neck tumor. Preferred examples of the microRNA whose expression increases in a head-and-neck tumor include miR-455-3p, miR-455-5p, miR-130b, miR-130b*, miR-801, miR-196a, miR-21 and miR-31. Preferred examples of the microRNA whose expression decreases in a head-and-neck tumor include miR-133b, miR-145 and miR-375.

Abstract: An object of the invention is to provide a dephosphorylation enzyme that regulates cardiomyocyte differentiation, dominant negative enzyme thereof, a gene encoding the enzyme protein and use thereof. A protein or the like consisting of any one of the following amino acid sequences (A) to (C) is used: (A) the amino acid sequence of SEQ ID NO:2; (B) an amino acid sequence wherein one or several amino acids except for cysteine at position 138 are deleted, substituted or added in the amino acid sequence of SEQ ID NO:2, wherein a protein consisting of the amino acid sequence has a dual specificity phosphatase activity; and (C) an amino acid sequence having at least 60% or more homology to the amino acid sequence of SEQ ID NO:2 and having cysteine at position 138, wherein a protein consisting of the amino acid sequence has a dual specificity phosphatase activity.

Abstract: Disclosed are: a method for using a particular microRNA as a biomarker for gynecological cancer; a method for the determination of gynecological cancer; a kit for the determination of gynecological cancer, and the like. The present invention is characterized in that at least one microRNA selected from the group of microRNAs consisting of miR-592, miR-629*, miR-517a, miR-205, miR-184, miR-509-5p, miR-135a*, miR-137, miR-602, miR-186*, miR-181a-2*, miR-193b*, miR-377*, miR-449b, miR-449a, miR-369-3p, miR-323-3p, miR-329, miR-299-5p, miR-34b, miR-411, miR-34c-5p, miR-376b, miR-885-5p, miR-337-3p, miR-337-5p, miR-127-3p, miR-138, miR-203, miR-488, miR-489, miR-643, miR-888, miR-424, miR-432, miR-433, miR-450a, miR-503, miR-542-3p, miR-542-5p and miR-584 is used as a biomarker for gynecological cancer.

Abstract: Disclosed are: a method for using a particular microRNA as a biomarker for head-and-neck tumor; a method for the determination of head-and-neck tumor; a kit for the determination of head-and-neck tumor, and the like. The present invention is characterized in that at least one microRNA selected from the group of microRNAs consisting of miR-455-3p, miR-455-5p, miR-130b, miR-130b*, miR-801, miR-196a, miR-21, miR-31, miR-133b, miR-145 and miR-375 is used as a biomarker for head-and-neck tumor.

Abstract: An object of the invention is to provide a dephosphorylation enzyme that regulates cardiomyocyte differentiation, dominant negative enzyme thereof, a gene encoding the enzyme protein and use thereof. A protein or the like consisting of any one of the following amino acid sequences (A) to (C) is used: (A) the amino acid sequence of SEQ ID NO:2; (B) an amino acid sequence wherein one or several amino acids except for cysteine at position 138 are deleted, substituted or added in the amino acid sequence of SEQ ID NO:2, wherein a protein consisting of the amino acid sequence has a dual specificity phosphatase activity; and (C) an amino acid sequence having at least 60% or more homology to the amino acid sequence of SEQ ID NO:2 and having cysteine at position 138, wherein a protein consisting of the amino acid sequence has a dual specificity phosphatase activity.