Patents by Inventor Masakazu Kamata

Masakazu Kamata 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: 20220175957
    Abstract: CNS metastases are a major cause of cancer deaths with few therapeutic options for treatment. Monoclonal anti-body-based therapy is one of the most successful therapeutic strategies for cancer; however, its efficacy is limited against CNS metastases due to insufficient CNS delivery. Here, we show significantly improved antibody delivery to the CNS using novel timed-release nanocapsules that encapsulate individual antibodies within a crosslinked phosphorylcholine polymer and gradually release cargo through hydrolysable crosslinkers. A single course of rituximab (RTX) nanocapsule treatment elevates RTX levels in the CNS by nearly 10-fold compared to native RTX. We improved control of CNS metastases in a murine xenograft model of non-Hodgkin lymphoma; moreover, using a xenograft humanized BLT mouse model, lymphomas were eliminated with a single course of RTX nanocapsule treatment. This approach is useful for treatment of cancers with CNS metastases and is generalizable for delivery of any antibody to the CNS.
    Type: Application
    Filed: February 19, 2020
    Publication date: June 9, 2022
    Applicant: The Regents of the University of California
    Inventors: Masakazu Kamata, Irvin S.Y. Chen, Yunfeng Lu, Jing Wen
  • Publication number: 20200397712
    Abstract: Novel siRNA and shRNA nanocapsules and delivery methods are disclosed herein. These siRNA and shRNA nanocapsules and delivery methods are highly robust and effective. This invention provides a platform for RNAi delivery with low toxicity and long intracellular half-life for practical therapeutic applications.
    Type: Application
    Filed: February 24, 2020
    Publication date: December 24, 2020
    Inventors: Yunfeng LU, Irvin S.Y. CHEN, Ming YAN, Min LIANG, Masakazu KAMATA, Jing WEN
  • Publication number: 20200061117
    Abstract: Disclosed herein is a CAR construct encoding an inhibitor of immunodeficiency virus fusion and human CD4 extracellular and transmembrane domains linked to a human CD3? signaling domain, and methods of making and using thereof to treat, reduce, or inhibit HIV in subjects.
    Type: Application
    Filed: May 4, 2018
    Publication date: February 27, 2020
    Inventors: Scott G. Kitchen, Anjie Zhen, Jerome A. Zack, Masakazu Kamata, Irvin Chen
  • Patent number: 10568844
    Abstract: Novel siRNA and shRNA nanocapsules and delivery methods are disclosed herein. These siRNA and shRNA nanocapsules and delivery methods are highly robust and effective. This invention provides a platform for RNAi delivery with low toxicity and long intracellular half-life for practical therapeutic applications.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: February 25, 2020
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Yunfeng Lu, Irvin S. Y. Chen, Ming Yan, Min Liang, Masakazu Kamata, Jing Wen
  • Publication number: 20180305435
    Abstract: The HIV-specific cytotoxic T lymphocyte (CTL) response is a critical component in controlling HIV replication and is an important part of the ultimate failure to eradicate the virus. Disclosed herein are methods for genetically enhancing the HIV-specific CTL response to allow long-term viral suppression or viral clearance. Human hematopoietic stem cells (HSCs) were genetically modified such that they differentiate into mature CTLs that will kill HIV infected cells. As disclosed herein, the functional effector cells are not human leukocyte antigen (HLA)-restricted. As disclosed herein, stem cells are transduced with non-HLA restricted chimeric antigen receptors (CARs) that allow the recognition of HIV or HIV-infected cells when expressed by a CTL. These CARs are hybrid molecules that contain an extracellular HIV recognition domain and an intracellular TCR-zeta signaling domain. The CTL response may be enhanced through the targeting of T cell inhibitory receptors.
    Type: Application
    Filed: April 18, 2018
    Publication date: October 25, 2018
    Inventors: Scott G. Kitchen, Jerome A. Zack, Otto O. Yang, Irvin Chen, Masakazu Kamata
  • Patent number: 9951118
    Abstract: The HIV-specific cytotoxic T lymphocyte (CTL) response is a critical component in controlling HIV replication and is an important part of the ultimate failure to eradicate the virus. Disclosed herein are methods for genetically enhancing the HIV-specific CTL response to allow long-term viral suppression or viral clearance. Human hematopoietic stem cells (HSCs) were genetically modified such that they differentiate into mature CTLs that will kill HIV infected cells. As disclosed herein, the functional effector cells are not human leukocyte antigen (HLA)-restricted. As disclosed herein, stem cells are transduced with non-HLA restricted chimeric antigen receptors (CARs) that allow the recognition of HIV or HIV-infected cells when expressed by a CTL. These CARs are hybrid molecules that contain an extracellular HIV recognition domain and an intracellular TCR-zeta signaling domain. The CTL response may be enhanced through the targeting of T cell inhibitory receptors.
    Type: Grant
    Filed: August 1, 2014
    Date of Patent: April 24, 2018
    Assignee: The Regents of the University of California
    Inventors: Scott G. Kitchen, Jerome A. Zack, Otto O. Yang, Irvin Chen, Masakazu Kamata
  • Publication number: 20180036254
    Abstract: Novel siRNA and shRNA nanocapsules and delivery methods are disclosed herein. These siRNA and shRNA nanocapsules and delivery methods are highly robust and effective. This invention provides a platform for RNAi delivery with low toxicity and long intracellular half-life for practical therapeutic applications.
    Type: Application
    Filed: September 29, 2017
    Publication date: February 8, 2018
    Inventors: Yunfeng LU, Irvin S.Y. CHEN, Ming YAN, Min LIANG, Masakazu KAMATA, Jing WEN
  • Patent number: 9782357
    Abstract: Novel siRNA and shRNA nanocapsules and delivery methods are disclosed herein. These siRNA and shRNA nanocapsules and delivery methods are highly robust and effective. This invention provides a platform for RNAi delivery with low toxicity and long intracellular half-life for practical therapeutic applications.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: October 10, 2017
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Yunfeng Lu, Irvin S. Y. Chen, Ming Yan, Min Liang, Masakazu Kamata, Jing Wen
  • Publication number: 20160194375
    Abstract: The HIV-specific cytotoxic T lymphocyte (CTL) response is a critical component in controlling HIV replication and is an important part of the ultimate failure to eradicate the virus. Disclosed herein are methods for genetically enhancing the HIV-specific CTL response to allow long-term viral suppression or viral clearance. Human hematopoietic stem cells (HSCs) were genetically modified such that they differentiate into mature CTLs that will kill HIV infected cells. As disclosed herein, the functional effector cells are not human leukocyte antigen (HLA)-restricted. As disclosed herein, stem cells are transduced with non HLA-restricted chimeric antigen receptors (CARs) that allow the recognition of HIV or HIV infected cells when expressed by a CTL.
    Type: Application
    Filed: August 1, 2014
    Publication date: July 7, 2016
    Inventors: Scott G. Kitchen, Jerome A. Zack, Otto O. Yang, Irvin Chen, Masakazu Kamata
  • Publication number: 20150071999
    Abstract: Novel siRNA and shRNA nanocapsules and delivery methods are disclosed herein. These siRNA and shRNA nanocapsules and delivery methods are highly robust and effective. This invention provides a platform for RNAi delivery with low toxicity and long intracellular half-life for practical therapeutic applications.
    Type: Application
    Filed: March 15, 2013
    Publication date: March 12, 2015
    Inventors: Yunfeng Lu, Irvin S.Y. Chen, Ming Yan, Min Liang, Masakazu Kamata, Jing Wen
  • Patent number: 7125957
    Abstract: An apoptosis inducing agent which comprises a protein as being Vpr protein encoded by vpr gene of HIV-1 wherein 15 amino acid residues from the C-terminal are deleted, and an apoptosis inducing gene encoding said protein. The agent induces apoptosis of cells and therefore useful as a medicament for treatment of a cancer or AIDS.
    Type: Grant
    Filed: January 29, 1999
    Date of Patent: October 24, 2006
    Assignee: Riken
    Inventors: Yoko Aida, Masakazu Kamata