Patents by Inventor Masayuki Kai

Masayuki Kai has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11912775
    Abstract: A monoclonal antibody is provided which binds to a human CC chemokine receptor 1 (CCR1) and inhibits activation of the human CCR1, or an antibody fragment thereof. The monoclonal antibody binds to an extracellular region of a human CCR1 and inhibits activation of the human CCR1 by a human CC chemokine ligand 15 (CCL15). An antibody fragment thereof, a hybridoma producing the antibody, a nucleic acid having a nucleotide sequence encoding the antibody or the antibody fragment, a transformant cell containing a vector containing the nucleic acid, a method for producing the antibody or the antibody fragment using the hybridoma or the transformant cell; a therapeutic agent and a diagnostic agent containing the antibody or the antibody fragment, and a method for treating and diagnosing a CCR1-related disease using the antibody or the antibody fragment are also provided.
    Type: Grant
    Filed: July 18, 2018
    Date of Patent: February 27, 2024
    Assignees: KYOWA KIRIN CO., LTD., KYOTO UNIVERSITY
    Inventors: Masayuki Kai, Shinya Ogawa, Makoto Taketo, Kenji Kawada, Hideyo Hirai, Yoshiharu Sakai, Taira Maekawa
  • Publication number: 20240026017
    Abstract: A monoclonal antibody is provided which binds to a human CC chemokine receptor 1 (CCR1) and inhibits activation of the human CCR1, or an antibody fragment thereof. The monoclonal antibody binds to an extracellular region of a human CCR1 and inhibits activation of the human CCR1 by a human CC chemokine ligand 15 (CCL15). An antibody fragment thereof, a hybridoma producing the antibody, a nucleic acid having a nucleotide sequence encoding the antibody or the antibody fragment, a transformant cell containing a vector containing the nucleic acid, a method for producing the antibody or the antibody fragment using the hybridoma or the transformant cell; a therapeutic agent and a diagnostic agent containing the antibody or the antibody fragment, and a method for treating and diagnosing a CCR1-related disease using the antibody or the antibody fragment are also provided.
    Type: Application
    Filed: September 1, 2023
    Publication date: January 25, 2024
    Applicants: Kyowa Kirin Co., Ltd., Kyoto University
    Inventors: Masayuki Kai, Shinya Ogawa, Makoto Taketo, Kenji Kawada, Hideyo Hirai, Yoshiharu Sakai, Taira Maekawa
  • Publication number: 20220220216
    Abstract: An object of the present invention is to provide a bispecific antibody including an antigen binding domain that binds to CD40 and an antigen binding domain that binds to GPC3. The present invention relates to a bispecific antibody including an antigen binding domain that binds to CD40 and an antigen binding domain that binds to GPC3, a bispecific antibody fragment thereof, a DNA encoding the bispecific antibody or the bispecific antibody fragment, a vector containing the DNA, and the like.
    Type: Application
    Filed: May 15, 2020
    Publication date: July 14, 2022
    Applicant: Kyowa Kirin Co., Ltd.
    Inventors: Yoshiki SUMITOMO, Masayuki KAI
  • Publication number: 20220017635
    Abstract: The present invention relates to a bispecific antibody in which an N-terminal side polypeptide is bound to an IgG portion that binds to TfR, a bispecific antibody fragment thereof, a DNA encoding the bispecific antibody or the bispecific antibody fragment thereof, a vector containing the DNA, a hybridoma and a transformant that produce the bispecific antibody or the bispecific antibody fragment thereof, a method for producing the bispecific antibody or the bispecific antibody fragment thereof, therapeutic and diagnostic agents containing the bispecific antibody or the bispecific antibody fragment thereof, therapeutic and diagnostic methods using the bispecific antibody or the bispecific antibody fragment thereof, and a reagent for detection or measurement containing the bispecific antibody or the bispecific antibody fragment thereof.
    Type: Application
    Filed: December 27, 2019
    Publication date: January 20, 2022
    Applicant: Kyowa Kirin Co., Ltd.
    Inventors: Keisuke MITAMURA, Ryosuke NAKANO, Masayuki KAI, Nobuaki TAKAHASHI
  • Publication number: 20200199240
    Abstract: An object of the present invention is to provide a monoclonal antibody which binds to a human CC chemokine receptor 1 (CCR1) and inhibits activation of the human CCR1, or an antibody fragment thereof. The present invention relates to a monoclonal antibody which binds to an extracellular region of a human CCR1 and inhibits activation of the human CCR1 by a human CC chemokine ligand 15 (CCL15), or an antibody fragment thereof, a hybridoma producing the antibody, a nucleic acid having a nucleotide sequence encoding the antibody or the antibody fragment, a transformant cell containing a vector containing the nucleic acid, a method for producing the antibody or the antibody fragment using the hybridoma or the transformant cell; a therapeutic agent and a diagnostic agent containing the antibody or the antibody fragment, and a method for treating and diagnosing a CCR1-related disease using the antibody or the antibody fragment.
    Type: Application
    Filed: July 18, 2018
    Publication date: June 25, 2020
    Applicants: KYOWA KIRIN CO., LTD., KYOTO UNIVERSITY
    Inventors: Masayuki KAI, Shinya OGAWA, Makoto TAKETO, Kenji KAWADA, Hideyo HIRAI, Yoshiharu SAKAI, Taira MAEKAWA
  • Patent number: 8999329
    Abstract: This invention provides an agonist antibody to a human thrombopoietin receptor (human c-Mpl), and pharmaceutical compositions comprising the same for use in treatment of thrombocytopenia. The disclosed agonist antibody comprises (1) antibody constant regions comprising heavy and light chain constant regions, each of which may optionally contain domain substitutions, or may contain deletions, substitutions, additions, or insertions of amino acid residues, and (2) antibody variable regions capable of binding to and activating a human thrombopoietin receptor. The-agonist antibody further induces colony formation at a concentration of 10,000 ng/ml or lower, and has a maximal activity at least 50% higher than that of PEG-rHuMGDF and an 50% effective concentration (EC50) of 100 nM or less.
    Type: Grant
    Filed: July 6, 2012
    Date of Patent: April 7, 2015
    Assignee: Kyowa Hakko Kirin Co., Ltd.
    Inventors: Masayuki Kai, Kazuhiro Motoki, Shiro Kataoka, Hideaki Yoshida, Tetsuya Hagiwara
  • Publication number: 20130053547
    Abstract: This invention provides an agonist antibody to a human thrombopoietin receptor (human c-Mpl), and pharmaceutical compositions comprising the same for use in treatment of thrombocytopenia. The disclosed agonist antibody comprises (1) antibody constant regions comprising heavy and light chain constant regions, each of which may optionally contain domain substitutions, or may contain deletions, substitutions, additions, or insertions of amino acid residues, and (2) antibody variable regions capable of binding to and activating a human thrombopoietin receptor. The-agonist antibody further induces colony formation at a concentration of 10,000 ng/ml or lower, and has a maximal activity at least 50% higher than that of PEG-rHuMGDF and an 50% effective concentration (EC50) of 100 nM or less.
    Type: Application
    Filed: July 6, 2012
    Publication date: February 28, 2013
    Applicant: KYOWA HAKKO KIRIN CO., LTD.
    Inventors: Masayuki KAI, Kazuhiro Motoki, Shiro Kataoka, Hideaki Yoshida, Tetsuya Hagiwara
  • Patent number: 8236314
    Abstract: This invention provides an agonist antibody to a human thrombopoietin receptor (human c-Mpl), and pharmaceutical compositions comprising the same for use in treatment of thrombocytopenia. The disclosed agonist antibody comprises (1) antibody constant regions comprising heavy and light chain constant regions, each of which may optionally contain domain substitutions, or may contain deletions, substitutions, additions, or insertions of amino acid residues, and (2) antibody variable regions capable of binding to and activating a human thrombopoietin receptor. The-agonist antibody further induces colony formation at a concentration of 10,000 ng/ml or lower, and has a maximal activity at least 50% higher than that of PEG-rHuMGDF and an 50% effective concentration (EC50) of 100 nM or less.
    Type: Grant
    Filed: September 14, 2011
    Date of Patent: August 7, 2012
    Assignee: Kyowa Hakko Kirin Co., Ltd.
    Inventors: Masayuki Kai, Kazuhiro Motoki, Shiro Kataoka, Hideaki Yoshida, Tetsuya Hagiwara
  • Publication number: 20120053326
    Abstract: This invention provides an agonist antibody to a human thrombopoietin receptor (human c-Mpl), and pharmaceutical compositions comprising the same for use in treatment of thrombocytopenia. The disclosed agonist antibody comprises (1) antibody constant regions comprising heavy and light chain constant regions, each of which may optionally contain domain substitutions, or may contain deletions, substitutions, additions, or insertions of amino acid residues, and (2) antibody variable regions capable of binding to and activating a human thrombopoietin receptor. The-agonist antibody further induces colony formation at a concentration of 10,000 ng/ml or lower, and has a maximal activity at least 50% higher than that of PEG-rHuMGDF and an 50% effective concentration (EC50) of 100 nM or less.
    Type: Application
    Filed: September 14, 2011
    Publication date: March 1, 2012
    Inventors: Masayuki KAI, Kazuhiro Motoki, Shiro Kataoka, Hideaki Yoshida, Tetsuya Hagiwara
  • Patent number: 8048421
    Abstract: This invention provides an agonist antibody to a human thrombopoietin receptor (alias: human c-Mpl).
    Type: Grant
    Filed: March 20, 2007
    Date of Patent: November 1, 2011
    Assignee: Kyowa Hakko Kirin Co., Ltd.
    Inventors: Masayuki Kai, Kazuhiro Motoki, Shiro Kataoka, Hideaki Yoshida, Tetsuya Hagiwara
  • Publication number: 20100004429
    Abstract: This invention provides an agonist antibody to a human thrombopoietin receptor (alias: human c-Mpl).
    Type: Application
    Filed: March 20, 2007
    Publication date: January 7, 2010
    Inventors: Masayuki Kai, Kazuhiro Motoki, Shiro Kataoka, Hideaki Yoshida, Tetsuya Hagiwara