Patents by Inventor Atsuhiko Maeda

Atsuhiko Maeda 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).

  • Publication number: 20170226206
    Abstract: An objective of the present invention is to provide methods for facilitating antigen-binding molecule-mediated antigen uptake into cells, methods for facilitating the reduction of antigen concentration in plasma, methods for increasing the number of antigens to which a single antigen-binding molecule can bind, methods for improving pharmacokinetics of antigen-binding molecules, antigen-binding molecules improved for facilitated antigen uptake into cells, antigen-binding molecules capable of facilitating the reduction of antigen concentration in plasma, antigen-binding molecules capable of repeatedly binding to antigens, antigen-binding molecules with improved pharmacokinetics, pharmaceutical compositions comprising such an antigen-binding molecule, and methods for producing those described above.
    Type: Application
    Filed: April 24, 2017
    Publication date: August 10, 2017
    Applicant: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Tomoyuki IGAWA, Shinya Ishii, Atsuhiko Maeda, Takashi Nakai
  • Publication number: 20170129950
    Abstract: The inventors successfully produced anti-Epiregulin antibodies showing cross-species reactivity between cynomolgus monkey (non-human animals) and human, anti-Epiregulin antibodies with suppressed chemical degradation, anti-Epiregulin antibodies with lowered isoelectric point, anti-Epiregulin antibodies with increased thermal denaturation midpoint temperature, and anti-Epiregulin antibodies with reduced amount of aggregate by performing appropriate amino acid residue substitutions in the variable-region sequences of the humanized EP27 antibody which inhibits growth of cancer cells by exhibiting cytotoxic activity and neutralizing activity against human Epiregulin-expressing cells.
    Type: Application
    Filed: September 15, 2016
    Publication date: May 11, 2017
    Inventors: Hirotake SHIRAIWA, Keiko Esaki, Tomoyuki Igawa, Taichi Kuramochi, Atsuhiko Maeda, Shigero Tamba, Hiroyuki Tsunoda, Tatsuhiko Tachibana, Yasuko Kinoshita, Masami Suzuki, Atsuhiko Kato, Etsuko Takeiri, Eri Hashimoto, Yoshinori Watanabe
  • Publication number: 20170121412
    Abstract: The present inventors succeeded in discovering specific amino acid mutations in the variable region, framework region, and constant region of TOCILIZUMAB, and this enables to reduce immunogenicity risk and the heterogeneity originated from disulfide bonds in the hinge region, as well as to improve antigen binding activity, pharmacokinetics, stability under acidic conditions, and stability in high concentration preparations.
    Type: Application
    Filed: September 13, 2016
    Publication date: May 4, 2017
    Applicant: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Tomoyuki Igawa, Mika Sakurai, Tetsuo Kojima, Tatsuhiko Tachibana, Hirotake Shiraiwa, Hiroyuki Tsunoda, Atsuhiko Maeda
  • Patent number: 9556264
    Abstract: The inventors successfully produced anti-Epiregulin antibodies showing cross-species reactivity between cynomolgus monkey (non-human animals) and human, anti-Epiregulin antibodies with suppressed chemical degradation, anti-Epiregulin antibodies with lowered isoelectric point, anti-Epiregulin antibodies with increased thermal denaturation midpoint temperature, and anti-Epiregulin antibodies with reduced amount of aggregate by performing appropriate amino acid residue substitutions in the variable-region sequences of the humanized EP27 antibody which inhibits growth of cancer cells by exhibiting cytotoxic activity and neutralizing activity against human Epiregulin-expressing cancer cells.
    Type: Grant
    Filed: December 28, 2012
    Date of Patent: January 31, 2017
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Hirotake Shiraiwa, Keiko Esaki, Tomoyuki Igawa, Taichi Kuramochi, Atsuhiko Maeda, Shigero Tamba, Hiroyuki Tsunoda, Tatsuhiko Tachibana, Yasuko Kinoshita, Masami Suzuki, Atsuhiko Kato, Etsuko Takeiri, Eri Hashimoto, Yoshinori Watanabe
  • Publication number: 20170022270
    Abstract: The present inventors newly discovered that even if an antigen-binding molecule inhibits in vitro some of the physiological activities of an antigen having two or more physiological activities without inhibiting the remaining physiological activities, the molecule can promote elimination of the antigen from blood (from serum or plasma) and as a result reduce the physiological activities in vivo, when the antigen-binding molecule is conferred with the properties: (i) of binding to human FcRn under an acidic pH range condition; (ii) of binding under a neutral pH range condition to human Fc receptor stronger than native human IgG, and (iii) that its antigen-binding activity alters according to the ion concentration.
    Type: Application
    Filed: August 8, 2016
    Publication date: January 26, 2017
    Applicant: CHUGAI SEIYAKU KABUSHIKI KAISHA
    Inventors: Tomoyuki Igawa, Atsuhiko Maeda, Shigero Tamba, Takehisa Kitazawa, Takeshi Baba, Yoshinao Ruike, Junichi Nezu
  • Publication number: 20170002066
    Abstract: An objective of the present invention is to provide methods for facilitating antigen-binding molecule-mediated antigen uptake into cells, methods for facilitating the reduction of antigen concentration in plasma, methods for increasing the number of antigens to which a single antigen-binding molecule can bind, methods for improving pharmacokinetics of antigen-binding molecules, antigen-binding molecules improved for facilitated antigen uptake into cells, antigen-binding molecules capable of facilitating the reduction of antigen concentration in plasma, antigen-binding molecules capable of repeatedly binding to antigens, antigen-binding molecules with improved pharmacokinetics, pharmaceutical compositions comprising such an antigen-binding molecule, and methods for producing those described above.
    Type: Application
    Filed: July 14, 2016
    Publication date: January 5, 2017
    Applicant: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Tomoyuki IGAWA, Shinya Ishii, Atsuhiko Maeda, Takashi Nakai
  • Publication number: 20170002080
    Abstract: An objective of the present invention is to provide methods for facilitating antigen-binding molecule-mediated antigen uptake into cells, methods for facilitating the reduction of antigen concentration in plasma, methods for increasing the number of antigens to which a single antigen-binding molecule can bind, methods for improving pharmacokinetics of antigen-binding molecules, antigen-binding molecules improved for facilitated antigen uptake into cells, antigen-binding molecules capable of facilitating the reduction of antigen concentration in plasma, antigen-binding molecules capable of repeatedly binding to antigens, antigen-binding molecules with improved pharmacokinetics, pharmaceutical compositions comprising such an antigen-binding molecule, and methods for producing those described above.
    Type: Application
    Filed: July 14, 2016
    Publication date: January 5, 2017
    Applicant: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Tomoyuki IGAWA, Shinya Ishii, Atsuhiko Maeda, Takashi Nakai
  • Publication number: 20160332870
    Abstract: This invention includes a sacrificial thin film formation step for chemical-mechanical polishing a temporary substrate made of a readily polishable material and sputtering a metal thin film along the smoothly polished surface, and a first bonding step for forming a sealing frame obtained by bringing at least a noble metal on the metal thin film and bonding a substrate on the sealing frame. This invention also includes a temporary substrate removal step for then removing the metal thin film along with the temporary substrate and exposing a new surface at the tip of the sealing frame; and a second bonding step for sputtering a noble metal thin film around a precision machine element on the machine substrate, bringing the new surface of the sealing frame into contact onto the noble metal thin film and bonding the new surface of the sealing frame onto the noble metal thin film at room temperature.
    Type: Application
    Filed: January 27, 2015
    Publication date: November 17, 2016
    Applicant: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Yuuichi KURASHIMA, Hideki TAKAGI, Atsuhiko MAEDA
  • Publication number: 20160244526
    Abstract: An objective of the present invention is to provide methods for facilitating antigen-binding molecule-mediated antigen uptake into cells, methods for facilitating the reduction of antigen concentration in plasma, methods for increasing the number of antigens to which a single antigen-binding molecule can bind, methods for improving pharmacokinetics of antigen-binding molecules, antigen-binding molecules improved for facilitated antigen uptake into cells, antigen-binding molecules capable of facilitating the reduction of antigen concentration in plasma, antigen-binding molecules capable of repeatedly binding to antigens, antigen-binding molecules with improved pharmacokinetics, pharmaceutical compositions comprising such an antigen-binding molecule, and methods for producing those described above.
    Type: Application
    Filed: February 22, 2016
    Publication date: August 25, 2016
    Applicant: CHUGAI SEIYAKU KABUSHIKI KAISHA
    Inventors: Tomoyuki Igawa, Shinya Ishii, Atsuhiko Maeda, Takashi Nakai
  • Publication number: 20160229908
    Abstract: One nonexclusive aspect provides molecules further improved from antibodies that can bind to antigens in an ion concentration-dependent manner. An alternative nonexclusive aspect provides safe and more advantageous Fc region variants that have decreased binding to pre-existing ADA. An alternative nonexclusive aspect provides novel IL-8 antibodies that are superior as pharmaceuticals.
    Type: Application
    Filed: February 4, 2016
    Publication date: August 11, 2016
    Applicant: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Tomoyuki IGAWA, Atsuhiko Maeda, Kenta Haraya, Tatsuhiko Tachibana, Yuki Iwayanagi, Yuji Hori, Genki Nakamura, Masaru Muraoka
  • Publication number: 20160159915
    Abstract: By means of amino acid sequence alterations, the present inventors succeeded in providing constant regions that can confer antibodies with favorable properties, particularly as pharmaceuticals. The variants of the constant regions provided by the present invention will remarkably reduce heterogeneity when applied to antibody production. That is, homogeneity of antibodies can be maintained at a high level by introducing the alterations provided by the present invention into the antibody heavy chain constant regions. More specifically, decrease in homogeneity caused by —SS— bond linkage differences in the heavy chains of antibody molecules can be prevented. Furthermore, in a preferred embodiment of the present invention, pharmacokinetics of antibodies can be improved and decrease in homogeneity caused by deletion of the C terminus in the antibody constant region can be ameliorated.
    Type: Application
    Filed: December 8, 2015
    Publication date: June 9, 2016
    Applicant: CHUGAI SEIYAKU KABUSHIKI KAISHA
    Inventors: Tomoyuki Igawa, Atsuhiko Maeda, Hirotake Shiraiwa
  • Patent number: 9340615
    Abstract: An objective of the present invention is to decrease the immunogenicity of mouse-derived anti-AXL antibodies in humans by humanizing them. The present invention provides antibodies that can bind to a specific region in Anexelekto (AXL) and humanized antibodies that are produced based on such antibodies. The anti-AXL antibodies of the present invention have high antitumor activity, and are useful as agents for decreasing the AXL expression level, antitumor agents, and diagnostic agents for cancer.
    Type: Grant
    Filed: May 14, 2010
    Date of Patent: May 17, 2016
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Atsuhiko Maeda, Hajime Miyamoto, Taichi Kuramochi, Atsushi Matsuo, Tomoyuki Igawa, Hirotake Shiraiwa, Hiroyuki Tsunoda, Tatsuhiko Tachibana
  • Publication number: 20160046693
    Abstract: The present invention provides antigen-binding molecules containing (i) an antigen-binding domain whose antigen-binding activity varies depending on ion concentration conditions, (ii) an Fc?R-binding domain having Fc? RIIb-selective binding activity, and (iii) an FcRn-binding domain having FcRn-binding activity under an acidic pH range condition, and methods of decreasing plasma antigen concentration as compared to before administering the molecule, which include the step of administering the molecule.
    Type: Application
    Filed: February 22, 2013
    Publication date: February 18, 2016
    Applicant: CHUGAI SEIYAKU KABUSHIKI KAISHA
    Inventors: Tomoyuki Igawa, Atsuhiko Maeda, Yuki Iwayanagi, Kenta Haraya, Hitoshi Katada, Shojiro Kadono, Futa Mimoto
  • Patent number: 9228017
    Abstract: By altering amino acid sequence, the present inventors succeeded in providing constant regions that can confer antibodies with favorable properties, particularly as pharmaceuticals. The variants of the constant regions provided by the present invention will remarkably reduce heterogeneity when applied to antibody production. That is, homogeneity of antibodies can be maintained at a high level by introducing the alterations provided by the present invention into the antibody heavy chain constant regions. More specifically, decrease in homogeneity caused by —SS— bond linkage differences in the heavy chains of antibody molecules can be prevented. Furthermore, in a preferred embodiment of the present invention, pharmacokinetics of antibodies can be improved and decrease in homogeneity caused by deletion of the C terminus in the antibody constant region can be ameliorated.
    Type: Grant
    Filed: March 19, 2010
    Date of Patent: January 5, 2016
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Tomoyuki Igawa, Atsuhiko Maeda, Hirotake Shiraiwa
  • Patent number: 9170732
    Abstract: An information input device includes a display, an input unit, an input direction determining unit, a tag arranging unit and a movable direction determining unit. The movable direction determining unit specifies, based on a first operation position on an input area of the input unit, a division part including the first operation position from among plural division parts on the input area. The tag arranging unit displays a tag indicating a slide operation pattern of an operator associated with the specified division part in the vicinity of a selection operation object or on the selection operation object on a display area of the display. The input direction determining unit detects, based on a second operation position on the input area, a slide operation pattern of the operator, and determines whether or not the detected slide operation pattern matches the slide operation pattern indicated by the tag within a certain range.
    Type: Grant
    Filed: March 18, 2011
    Date of Patent: October 27, 2015
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Atsuhiko Maeda, Hiroshi Chigira, Minoru Kobayashi
  • Publication number: 20150274809
    Abstract: By altering amino acid sequences, the present inventors successfully produced constant regions that can confer antibodies with particularly favorable properties for pharmaceutical agents. When used to produce antibodies, the altered constant regions produced according to the present invention significantly reduce heterogeneity. Specifically, the antibody homogeneity can be achieved by using antibody heavy chain and light chain constant regions introduced with alterations provided by the present invention. More specifically, the alterations can prevent the loss of homogeneity of antibody molecules due to disulfide bond differences in the heavy chain. Furthermore, in a preferred embodiment, the present invention can improve antibody pharmacokinetics as well as prevent the loss of homogeneity due to C-terminal deletion in antibody constant region.
    Type: Application
    Filed: April 7, 2015
    Publication date: October 1, 2015
    Applicant: CHUGAI SEIYAKU KABUSHIKI KAISHA
    Inventors: Tomoyuki Igawa, Taichi Kuramochi, Atsuhiko Maeda, Hirotake Shiraiwa
  • Publication number: 20150210763
    Abstract: Polypeptides with improved stability as compared to that of a parent polypeptide were successfully obtained by modifying at least one amino acid in a loop region of the antibody Fc region. Furthermore, by combining multiple amino acid modifications in the loop region, polypeptides with maintained or enhanced Fc?R-binding activity as well as improved thermal stability, polypeptides with decreased Fc?R-binding activity as well as improved thermal stability, and polypeptides with not only improved thermal stability and adjusted Fc?R-binding activity but also decreased aggregate content, as compared to those of a parent polypeptide, were successfully obtained.
    Type: Application
    Filed: February 8, 2013
    Publication date: July 30, 2015
    Applicant: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Taichi Kuramochi, Meiri Kawazoe, Futa Mimoto, Atsuhiko Maeda, Tomoyuki Igawa
  • Publication number: 20150166666
    Abstract: The present invention provides pharmaceutical compositions comprising second-generation molecules that are superior than TOCILIZUMAB, by altering the amino acid sequences of the variable and constant regions of TOCILIZUMAB, which is a humanized anti-IL-6 receptor IgG1 antibody, to enhance the antigen-neutralizing ability and increase the pharmacokinetics, so that the therapeutic effect is exerted with a less frequency of administration, and the immunogenicity, safety and physicochemical properties (stability and homogeneity) are improved. The present invention also provides methods for producing these pharmaceutical compositions. The present inventors have successfully generated second-generation molecules that are superior to TOCILIZUMAB by appropriately combining amino acid sequence alterations in the CDR domains, variable regions, and constant regions.
    Type: Application
    Filed: October 22, 2014
    Publication date: June 18, 2015
    Applicant: CHUGAI SEIYAKU KABUSHIKI KAISHA
    Inventors: Tomoyuki Igawa, Shinya Ishii, Atsuhiko Maeda, Mika Sakurai, Tetsuo Kojima, Tatsuhiko Tachibana, Hirotake Shiraiwa, Hiroyuki Tsunoda, Yoshinobu Higuchi
  • Publication number: 20150110793
    Abstract: The inventors successfully produced anti-Epiregulin antibodies showing cross-species reactivity between cynomolgus monkey (non-human animals) and human, anti-Epiregulin antibodies with suppressed chemical degradation, anti-Epiregulin antibodies with lowered isoelectric point, anti-Epiregulin antibodies with increased thermal denaturation midpoint temperature, and anti-Epiregulin antibodies with reduced amount of aggregate by performing appropriate amino acid residue substitutions in the variable-region sequences of the humanized EP27 antibody which inhibits growth of cancer cells by exhibiting cytotoxic activity and neutralizing activity against human Epiregulin-expressing cancer cells.
    Type: Application
    Filed: December 28, 2012
    Publication date: April 23, 2015
    Inventors: Hirotake Shiraiwa, Keiko Esaki, Tomoyuki Igawa, Taichi Kuramochi, Atsuhiko Maeda, Shigero Tamba, Hiroyuki Tsunoda, Tatsuhiko Tachibana, Yasuko Kinoshita, Masami Suzuki, Atsuhiko Kato, Etsuko Takeiri, Eri Hashimoto, Yoshinori Watanabe
  • Publication number: 20150050269
    Abstract: The present inventors newly discovered that even if an antigen-binding molecule inhibits in vitro some of the physiological activities of an antigen having two or more physiological activities without inhibiting the remaining physiological activities, the molecule can promote elimination of the antigen from blood (from serum or plasma) and as a result reduce the physiological activities in vivo, when the antigen-binding molecule is conferred with the properties: (i) of binding to human FcRn under an acidic pH range condition; (ii) of binding under a neutral pH range condition to human Fc receptor stronger than native human IgG, and (iii) that its antigen-binding activity alters according to the ion concentration.
    Type: Application
    Filed: September 28, 2012
    Publication date: February 19, 2015
    Applicant: CHUGAI SEIYAKU KABUSHIKI KAISHA
    Inventors: Tomoyuki Igawa, Atsuhiko Maeda, Shigero Tamba, Takehisa Kitazawa, Takeshi Baba, Yoshinao Ruike, Junichi Nezu