Patents by Inventor Leonardo M.R. Ferreira

Leonardo M.R. Ferreira 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: 20240141288
    Abstract: Disclosed herein are universal donor stem cells and related methods of their use and production. The universal donor stem cells disclosed herein are useful for overcoming the immune rejection in cell-based transplantation therapies. In certain embodiments, the universal donor stem cells disclosed herein do not express one or more MHC-I and MHC-II human leukocyte antigens. Similarly, in certain embodiments, the universal donor stem cells disclosed herein do not express one or more human leukocyte antigens (e.g., HLA-A, HLA-B and/or HLA-C) corresponding to MHC-I and MHC-II human leukocyte antigens, thereby rendering such cells hypoimmunogenic.
    Type: Application
    Filed: November 23, 2022
    Publication date: May 2, 2024
    Inventors: Torsten B. Meissner, Leonardo M.R. Ferreira, Jack L. Strominger, Chad A. Cowan
  • Publication number: 20230323288
    Abstract: Disclosed herein are universal donor stem cells and related methods of their use and production. The universal donor stem cells disclosed herein are useful for overcoming the immune rejection in cell-based transplantation therapies. In certain embodiments, the universal donor stem cells disclosed herein do not express one or more MHC-I and MHC-II human leukocyte antigens. Similarly, in certain embodiments, the universal donor stem cells disclosed herein do not express one or more human leukocyte antigens (e.g., HLA-A, HLA-B and/or HLA-C) corresponding to MHC-I and MHC-II human leukocyte antigens, thereby rendering such cells hypoimmunogenic.
    Type: Application
    Filed: November 23, 2022
    Publication date: October 12, 2023
    Inventors: Torsten B. Meissner, Leonardo M.R. Ferreira, Jack L. Strominger, Chad A. Cowan
  • Publication number: 20230303969
    Abstract: Disclosed herein are universal donor stem cells and related methods of their use and production. The universal donor stem cells disclosed herein are useful for overcoming the immune rejection in cell-based transplantation therapies. In certain embodiments, the universal donor stem cells disclosed herein do not express one or more MHC-I and MHC-II human leukocyte antigens. Similarly, in certain embodiments, the universal donor stem cells disclosed herein do not express one or more human leukocyte antigens (e.g., HLA-A, HLA-B and/or HLA-C) corresponding to MHC-I and MHC-II human leukocyte antigens, thereby rendering such cells hypoimmunogenic.
    Type: Application
    Filed: November 23, 2022
    Publication date: September 28, 2023
    Inventors: Torsten B. Meissner, Leonardo M.R. Ferreira, Jack L. Strominger, Chad A. Cowan
  • Publication number: 20230303968
    Abstract: Disclosed herein are universal donor stem cells and related methods of their use and production. The universal donor stem cells disclosed herein are useful for overcoming the immune rejection in cell-based transplantation therapies. In certain embodiments, the universal donor stem cells disclosed herein do not express one or more MHC-I and MHC-II human leukocyte antigens. Similarly, in certain embodiments, the universal donor stem cells disclosed herein do not express one or more human leukocyte antigens (e.g., HLA-A, HLA-B and/or HLA-C) corresponding to MHC-I and MHC-II human leukocyte antigens, thereby rendering such cells hypoimmunogenic.
    Type: Application
    Filed: November 23, 2022
    Publication date: September 28, 2023
    Inventors: Torsten B. Meissner, Leonardo M.R. Ferreira, Jack L. Strominger, Chad A. Cowan
  • Patent number: 11618881
    Abstract: Disclosed herein are universal donor stem cells and related methods of their use and production. The universal donor stem cells disclosed herein are useful for overcoming the immune rejection in cell-based transplantation therapies. In certain embodiments, the universal donor stem cells disclosed herein do not express one or more MHC-I and MHC-II human leukocyte antigens. Similarly, in certain embodiments, the universal donor stem cells disclosed herein do not express one or more human leukocyte antigens (e.g., HLA-A, HLA-B and/or HLA-C) corresponding to MHC-I and MHC-II human leukocyte antigens, thereby rendering such cells hypoimmunogenic.
    Type: Grant
    Filed: January 13, 2021
    Date of Patent: April 4, 2023
    Assignee: President and Fellows of Harvard College
    Inventors: Torsten B. Meissner, Leonardo M. R. Ferreira, Jack L. Strominger, Chad A. Cowan
  • Patent number: 11492591
    Abstract: Disclosed herein are universal donor stem cells and related methods of their use and production. The universal donor stem cells disclosed herein are useful for overcoming the immune rejection in cell-based transplantation therapies. In certain embodiments, the universal donor stem cells disclosed herein do not express one or more MHC-I and MHC-II human leukocyte antigens. Similarly, in certain embodiments, the universal donor stem cells disclosed herein do not express one or more human leukocyte antigens (e.g., HLA-A, HLA-B and/or HLA-C) corresponding to MHC-I and MHC-II human leukocyte antigens, thereby rendering such cells hypoimmunogenic.
    Type: Grant
    Filed: October 9, 2021
    Date of Patent: November 8, 2022
    Assignee: President and Fellows of Harvard College
    Inventors: Torsten B. Meissner, Leonardo M. R. Ferreira, Jack L. Strominger, Chad A. Cowan
  • Publication number: 20220162555
    Abstract: Disclosed herein are modified primary human T cells and populations thereof comprising a genome in which the CTLA4, PD1, TCRA, TCRB, and/or B2M genes have been edited to generate an off-the-shelf universal CAR T cell from allogeneic healthy donors that can be administered to any patient while reducing or eliminating the risk of immune rejection or graft versus host disease, and which are not prone to T cell inhibition, and methods for allogeneic administration of such cells to reduce the likelihood that the cells will trigger a host immune response when the cells are administered to a subject in need of such cells.
    Type: Application
    Filed: December 2, 2021
    Publication date: May 26, 2022
    Inventors: Torsten B. Meissner, Kabungo Y. Mulumba, Leonardo M.R. Ferreira, Chad A. Cowan
  • Publication number: 20220162554
    Abstract: Disclosed herein are modified primary human T cells and populations thereof comprising a genome in which the CTLA4, PD1, TCRA, TCRB, and/or B2M genes have been edited to generate an off-the-shelf universal CAR T cell from allogeneic healthy donors that can be administered to any patient while reducing or eliminating the risk of immune rejection or graft versus host disease, and which are not prone to T cell inhibition, and methods for allogeneic administration of such cells to reduce the likelihood that the cells will trigger a host immune response when the cells are administered to a subject in need of such cells.
    Type: Application
    Filed: November 12, 2021
    Publication date: May 26, 2022
    Inventors: Torsten B. Meissner, Kabungo Y. Mulumba, Leonardo M.R. Ferreira, Chad A. Cowan
  • Publication number: 20220112459
    Abstract: Disclosed herein are universal donor stem cells and related methods of their use and production. The universal donor stem cells disclosed herein are useful for overcoming the immune rejection in cell-based transplantation therapies. In certain embodiments, the universal donor stem cells disclosed herein do not express one or more MHC-I and MHC-II human leukocyte antigens. Similarly, in certain embodiments, the universal donor stem cells disclosed herein do not express one or more human leukocyte antigens (e.g., HLA-A, HLA-B and/or HLA-C) corresponding to MHC-I and MHC-II human leukocyte antigens, thereby rendering such cells hypoimmunogenic.
    Type: Application
    Filed: October 9, 2021
    Publication date: April 14, 2022
    Inventors: Torsten B. Meissner, Leonardo M.R. Ferreira, Jack L. Strominger, Chad A. Cowan
  • Publication number: 20210261916
    Abstract: Disclosed herein are universal donor stem cells and related methods of their use and production. The universal donor stem cells disclosed herein are useful for overcoming the immune rejection in cell-based transplantation therapies. In certain embodiments, the universal donor stem cells disclosed herein do not express one or more MHC-I and MHC-II human leukocyte antigens. Similarly, in certain embodiments, the universal donor stem cells disclosed herein do not express one or more human leukocyte antigens (e.g., HLA-A, HLA-B and/or HLA-C) corresponding to MHC-I and MHC-II human leukocyte antigens, thereby rendering such cells hypoimmunogenic.
    Type: Application
    Filed: January 13, 2021
    Publication date: August 26, 2021
    Inventors: Torsten B. Meissner, Leonardo M.R. Ferreira, Jack L. Strominger, Chad A. Cowan
  • Publication number: 20210171903
    Abstract: Disclosed herein are universal donor stem cells and related methods of their use and production. The universal donor stem cells disclosed herein are useful for overcoming the immune rejection in cell-based transplantation therapies. In certain embodiments, the universal donor stem cells disclosed herein have modulated expression of one or more MHC-I and MHC-II human leukocyte antigens and one or more tolerogenic factors.
    Type: Application
    Filed: June 22, 2020
    Publication date: June 10, 2021
    Inventors: Torsten B. Meissner, Leonardo M.R. Ferreira, Jack L. Strominger, Chad A. Cowan
  • Patent number: 10968426
    Abstract: Disclosed herein are universal donor stem cells and related methods of their use and production. The universal donor stem cells disclosed herein are useful for overcoming the immune rejection in cell-based transplantation therapies. In certain embodiments, the universal donor stem cells disclosed herein do not express one or more MHC-I and MHC-II human leukocyte antigens. Similarly, in certain embodiments, the universal donor stem cells disclosed herein do not express one or more human leukocyte antigens (e.g., HLA-A, HLA-B and/or HLA-C) corresponding to MHC-I and MHC-II human leukocyte antigens, thereby rendering such cells hypoimmunogenic.
    Type: Grant
    Filed: May 9, 2016
    Date of Patent: April 6, 2021
    Assignee: President and Fellows of Harvard College
    Inventors: Torsten B. Meissner, Leonardo M. R. Ferreira, Jack L. Strominger, Chad A. Cowan
  • Publication number: 20210017248
    Abstract: Chimeric antigen receptor (CAR)-expressing T regulatory cells (Tregs) include intracellular co-stimulatory or inhibitory domains based on the biology, functions and activities of Tregs. The co-stimulatory or inhibitory domains modulate the Treg response, thereby, activating or suppressing an effector T cell (Teff) immune response to specific antigens.
    Type: Application
    Filed: March 15, 2019
    Publication date: January 21, 2021
    Inventors: Jeffrey A. Bluestone, Qizhi Tang, Leonardo M.R. Ferreira
  • Publication number: 20190309259
    Abstract: Disclosed herein are universal donor stem cells and related methods of their use and production. The universal donor stem cells disclosed herein are useful for overcoming the immune rejection in cell-based transplantation therapies. In certain embodiments, the universal donor stem cells disclosed herein do not express one or more MHC-I and MHC-II human leukocyte antigens. Similarly, in certain embodiments, the universal donor stem cells disclosed herein do not express one or more human leukocyte antigens (e.g., HLA-A, HLA-B and/or HLA-C) corresponding to MHC-I and MHC-II human leukocyte antigens, thereby rendering such cells hypoimmunogenic.
    Type: Application
    Filed: May 9, 2016
    Publication date: October 10, 2019
    Inventors: Torsten B. Meissner, Leonardo M.R. Ferreira, Jack L. Strominger, Chad A. Cowan
  • Publication number: 20180141992
    Abstract: Disclosed herein are cells and populations of cells comprising a genome in which the B2M gene has been edited to eliminate surface expression of MHC Class I protein in the cells or population of cells, and methods for allogeneic administration of such cells to reduce the likelihood that the cells will trigger a host immune response when the cells are administered to a subject in need of such cells.
    Type: Application
    Filed: November 6, 2015
    Publication date: May 24, 2018
    Applicant: President and Fellows of Harvard College
    Inventors: Chad A. Cowan, Leonardo M.R. Ferreira, Torsten B. Meissner, Jack L. Strominger
  • Publication number: 20160348073
    Abstract: Disclosed herein are modified primary human T cells and populations thereof comprising a genome in which the CTLA4, PD1, TCRA, TCRB, and/or B2M genes have been edited to generate an off-the-shelf universal CAR T cell from allogeneic healthy donors that can be administered to any patient while reducing or eliminating the risk of immune rejection or graft versus host disease, and which are not prone to T cell inhibition, and methods for allogeneic administration of such cells to reduce the likelihood that the cells will trigger a host immune response when the cells are administered to a subject in need of such cells.
    Type: Application
    Filed: March 28, 2016
    Publication date: December 1, 2016
    Inventors: Torsten B. Meissner, Kabungo Y. Mulumba, Leonardo M.R. Ferreira, Chad A. Cowan