Patents by Inventor Koh Sato

Koh Sato 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: 7842790
    Abstract: Disclosed are an antibody against human para-thyroid-hormone-related protein, a DNA coding for the antibody, a recombinant vector containing the DNA, a transformant transformed with the recombinant vector, a method for preparation of the antibody, and uses of the antibody.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: November 30, 2010
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Koh Sato, Yuji Wakahara, Naohiro Yabuta
  • Patent number: 7563599
    Abstract: The present invention discloses reshaped antibody to human medulloblastoma cells comprising: (A) an L chain comprising: (1) a human L chain C region, and (2) an L chain V region comprising human L chain FRs and L chain CDRs of mouse monoclonal antibody ONS-M21 to human medulloblastoma cells; and, (B) an H chain containing: (1) a human H chain C region, and (2) an H chain V region comprising human H chain FRs and H chain CDRs of mouse monoclonal antibody ONS-M21 to human medulloblastoma cells. Since the majority of this reshaped human antibody is derived from a human antibody and mouse CDRs have a low level of antigenicity, the reshaped human antibody of the present invention has a low level of antigenicity in humans, and is therefore expected to be useful as a therapeutic agent and diagnostic tool for brain tumors such as medulloblastoma which strongly express antigen that is recognized by this antibody.
    Type: Grant
    Filed: May 6, 2004
    Date of Patent: July 21, 2009
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Toshihiko Ohtomo, Koh Sato, Masayuki Tsuchiya
  • Patent number: 7494647
    Abstract: A humanized antibody against tissue factor (TF), comprising: A: a humanized H chain comprising (1) a H chain V region comprising the H chain CDRs of a mouse monoclonal antibody against TF and the H chain FRs of a human antibody, and (2) the H chain C region of a human antibody; and B: a humanized L chain comprising (1) an L chain V region comprising the L chain CDRs of a mouse monoclonal antibody against TF and the L chain FRs of a human antibody, and (2) the L chain C region of a human antibody. After generating a humanized V region by grafting the CDRs of a mouse monoclonal antibody onto a human antibody, a humanized antibody having a higher activity is searched by replacing the FR of the above region with the corresponding FR of the human antibody having a high homology.
    Type: Grant
    Filed: June 16, 2003
    Date of Patent: February 24, 2009
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Koh Sato, Hideki Adachi, Naohiro Yabuta
  • Patent number: 7479543
    Abstract: A reshaped human antibody to the human IL-6R, comprising: (A) an L chain comprising, (1) a human L chain C region, and (2) an L chain V region comprising human L chain framework regions (FRs), and mouse L chain complementary determination regions (CDRs) of a momoclonal antibody to the IL-6 receptor (IL-6R); and (B) an H chain comprising, (1) a human H chain C region, and (2) an H chain V region comprising human H chain FRS, and mouse H chain CDRs of a monoclonal antibody to the IL-6R. Since major portion of the reshaped human antibody is derived from a human antibody and the mouse CDRs which are less immunogenic, the present reshaped human antibody is less immunogenic to human, and therefor is promised for therapeutic uses.
    Type: Grant
    Filed: May 4, 2004
    Date of Patent: January 20, 2009
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Masayuki Tsuchiya, Koh Sato, Mary Margaret Bendig, Steven Tarran Jones, Jose William Saldanha
  • Patent number: 7468184
    Abstract: The invention relates to a therapeutic agent for cachexia comprising, as an active ingredient, a substance capable of inhibiting the binding between a parathyroid hormone related protein (PTHrP) and a receptor thereof.
    Type: Grant
    Filed: January 8, 2003
    Date of Patent: December 23, 2008
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Koh Sato, Toshiaki Tsunenari, Kimie Ishii
  • Publication number: 20080095772
    Abstract: Disclosed are an antibody against human para-thyroid-hormone-related protein, a DNA coding for the antibody, a recombinant vector containing the DNA, a transformant transformed with the recombinant vector, a method for preparation of the antibody, and uses of the antibody.
    Type: Application
    Filed: October 31, 2007
    Publication date: April 24, 2008
    Applicant: CHUGAI SEIYAKU KABUSHIKI KAISHA
    Inventors: Koh SATO, Yuji Wakahara, Naohiro Yabuta
  • Patent number: 7358355
    Abstract: Disclosed are an antibody against human para-thyroid-hormone-related protein, a DNA coding for the antibody, a recombinant vector containing the DNA, a transformant transformed with the recombinant vector, a method for preparation of the antibody, and uses of the antibody.
    Type: Grant
    Filed: February 2, 2005
    Date of Patent: April 15, 2008
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Koh Sato, Yuji Wakahara, Naohiro Yabuta
  • Publication number: 20050249726
    Abstract: The present invention discloses reshaped antibody to human medulloblastoma cells comprising: (A) an L chain comprising: (1) a human L chain C region, and (2) an L chain V region comprising human L chain FRs and L chain CDRs of mouse monoclonal antibody ONS-M21 to human medulloblastoma cells; and, (B) an H chain containing: (1) a human H chain C region, and (2) an H chain V region comprising human H chain FRs and H chain CDRs of mouse monoclonal antibody ONS-M21 to human medulloblastoma cells. Since the majority of this reshaped human antibody is derived from a human antibody and mouse CDRs have a low level of antigenicity, the reshaped human antibody of the present invention has a low level of antigenicity in humans, and is therefore expected to be useful as a therapeutic agent and diagnostic tool for brain tumors such as medulloblastoma which strongly express antigen that is recognized by this antibody.
    Type: Application
    Filed: May 6, 2004
    Publication date: November 10, 2005
    Inventors: Toshihiko Ohtomo, Koh Sato, Masayuki Tsuchiya
  • Publication number: 20050142635
    Abstract: A reshaped human antibody to the human IL-6R, comprising: (A) an L chain comprising, (1) a human L chain C region, and (2) an L chain V region comprising human L chain framework regions (FRs), and mouse L chain complementary determination regions (CDRs) of a momoclonal antibody to the IL-6 receptor (IL-6R); and (B) an H chain comprising, (1) a human H chain C region, and (2) an H chain V region comprising human H chain FRS, and mouse H chain CDRs of a monoclonal antibody to the IL-6R. Since major portion of the reshaped human antibody is derived from a human antibody and the mouse CDRs which are less immunogenic, the present reshaped human antibody is less immunogenic to human, and therefor is promised for therapeutic uses.
    Type: Application
    Filed: May 4, 2004
    Publication date: June 30, 2005
    Inventors: Masayuki Tsuchiya, Koh Sato, Mary Margaret Bendig, Steven Tarran Jones, Jose Saldanha
  • Publication number: 20050136057
    Abstract: Disclosed are an antibody against human para-thyroid-hormone-related protein, a DNA coding for the antibody, a recombinant vector containing the DNA, a transformant transformed with the recombinant vector, a method for preparation of the antibody, and uses of the antibody.
    Type: Application
    Filed: February 2, 2005
    Publication date: June 23, 2005
    Inventors: Koh Sato, Yuji Wakahara, Naohiro Yabuta
  • Patent number: 6903194
    Abstract: Disclosed are an antibody against human para-thyroid-hormone-related protein, a DNA coding for the antibody, a recombinant vector containing the DNA, a transformant transformed with the recombinant vector, a method for preparation of the antibody, and uses of the antibody.
    Type: Grant
    Filed: September 24, 1997
    Date of Patent: June 7, 2005
    Assignee: Chungai Seiyaku Kabushiki Kaisha
    Inventors: Koh Sato, Yuji Wakahara, Naohiro Yabuta
  • Publication number: 20040044187
    Abstract: A humanized antibody against tissue factor (TF), comprising:
    Type: Application
    Filed: June 16, 2003
    Publication date: March 4, 2004
    Applicant: CHUGAI SEIYAKU KABUSHIKI KAISHA
    Inventors: Koh Sato, Hideki Adachi, Naohiro Yabuta
  • Patent number: 6677436
    Abstract: The present invention relates to a human/mouse chimeric antibody that includes the variable region of a mouse monoclonal antibody against human tissue factor (TF) and the constant region of a human antibody. The humanized antibody contains light and heavy chain complementarity determining regions of a mouse monoclonal antibody against human TF which have been grafted onto a human antibody. The present invention also provides a therapeutic agent for disseminated intravascular coagulation (DIC) syndrome, which includes a humanized antibody against human TF as an active ingredient.
    Type: Grant
    Filed: September 29, 2000
    Date of Patent: January 13, 2004
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Koh Sato, Hideki Adachi, Naohiro Yabuta
  • Publication number: 20030138424
    Abstract: The invention relates to a therapeutic agent for cachexia comprising, as an active ingredient, a substance capab;le of inhibiting the binding between a parathyroid hormone related protein (PTHrP) and a receptor thereof.
    Type: Application
    Filed: January 8, 2003
    Publication date: July 24, 2003
    Applicant: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Koh Sato, Toshiaki Tsunenari, Kimie Ishii
  • Publication number: 20030023045
    Abstract: The present invention discloses reshaped antibody to human medulloblastoma cells comprising:
    Type: Application
    Filed: December 29, 2000
    Publication date: January 30, 2003
    Inventors: Toshihiko Ohtomo, Koh Sato, Masayuki Tsuchiya
  • Publication number: 20020165363
    Abstract: The invention relates to a therapeutic agent for cachexia comprising, as an active ingredient, a substance capab;le of inhibiting the binding between a parathyroid hormone related protein (PTHrP) and a receptor thereof.
    Type: Application
    Filed: November 12, 1999
    Publication date: November 7, 2002
    Inventors: KOH SATO, TOSHIAKI TSUNENARI, KIMIE ISHII
  • Publication number: 20020082396
    Abstract: The present invention discloses a reshaped human antibody against human IL-8 comprising:
    Type: Application
    Filed: December 7, 2000
    Publication date: June 27, 2002
    Inventors: Kouji Matsushima, Yoshihiro Matsumoto, Yoshiki Yamada, Koh Sato, Masayuki Tsuchiya, Tatsumi Yamazaki
  • Patent number: 6245894
    Abstract: A reshaped human antibody is characterized as having the same binding affinity for IL-8 as a chimeric antibody but with low immunogenicity in comparison. The reshaped antibody has the following elements: a human L chain C region or a human L chain FR and an L chain CDR from a mouse monoclonal antibody against human IL-8 and a human H chain C region or a human H chain FR and an H chain CDR of mouse monoclonal antibody against human IL-8. Since the reshaped human antibody has low immunogenicity to humans, it is suitable for use in medical treatment of a variety of medical conditions.
    Type: Grant
    Filed: October 12, 1999
    Date of Patent: June 12, 2001
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Kouji Matsushima, Yoshihiro Matsumoto, Yoshiki Yamada, Koh Sato, Masayuki Tsuchiya, Tatsumi Yamazaki
  • Patent number: 6214973
    Abstract: The present invention discloses reshaped antibody to human medulloblastoma cells comprising: (A) an L chain comprising: (1) a human L chain C region, and (2) an L chain V region comprising human L chain FRs and L chain CDRs of mouse monoclonal antibody ONS-M21 to human medulloblastoma cells; and, (B) an H chain containing: (1) a human H chain C region, and (2) an H chain V region comprising human H chain FRs and H chain CDRs of mouse monoclonal antibody ONS-M21 to human medulloblastoma cells. Since the majority of this reshaped human antibody is derived from a human antibody and mouse CDRs have a low level of antigenicity, the reshaped human antibody of the present invention has a low level of antigenicity in humans, and is therefore expected to be useful as a therapeutic agent and diagnostic tool for brain tumors such as medulloblastoma which strongly express antigen that is recognized by this antibody.
    Type: Grant
    Filed: September 9, 1996
    Date of Patent: April 10, 2001
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Toshihiko Ohtomo, Koh Sato, Masayuki Tsuchiya
  • Patent number: 6121423
    Abstract: A reshaped antibody comprising:(A) L chains comprising:(1) a human C region, and(2) an L chain V region comprising human L chain FRs and L chain CDRs of a mouse monoclonal antibody; and(B) H chains comprising:(1) a human H chain C region, and(2) an H chain V region comprising human H chain FRs, and H chain CDRs of a mouse monoclonal antibody to human IL-6. Since the major portions of the reshaped human antibody are derived from human, and the mouse CDRs are less immunogenic, then the present reshaped human antibody is less immunogenic, and therefore inhibits information transfer by IL-6, and is promising as a therapeutic agent for diseases caused by IL-6.
    Type: Grant
    Filed: December 4, 1998
    Date of Patent: September 19, 2000
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Masayuki Tsuchiya, Koh Sato, Yuichi Hirata