Patents by Inventor Katsuo Takeda

Katsuo Takeda 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).

  • Phage with nuclear localization signal
    Patent number: 6759231
    Abstract: A &lgr; phage with a nuclear localization signal has been obtained by constructing a vector capable of expressing a fused protein between a gpD protein constituting the head of a &lgr; phage and a nuclear localization signal sequence, transforming Escherichia coli with this vector, and propagating a mutant &lgr; phage which cannot express the gpD protein in E. coli in this transformant. It has been confirmed that the resulting &lgr; phage is capable of packaging &lgr; phage DNAs of 80% and 100% genome sizes. After further confirming that the nuclear localization signal exposed on the outside of the head of this phage, this phage has been microinjected into cells to analyze its nuclear localization activity. Thus, it has been clarified that this phage has a nuclear localization activity.
    Type: Grant
    Filed: April 27, 2001
    Date of Patent: July 6, 2004
    Assignee: Dnavec Research Inc.
    Inventors: Mahito Nakanishi, Emi Nagoshi, Teruo Akuta, Katsuo Takeda, Mamoru Hasegawa
  • Nucleic acid transfer phage
    Patent number: 6740524
    Abstract: The present invention provides a novel phage expressing in its head a bi-functional protein that has nuclear translocation and cell adhesion activities. The phage is used to package a foreign substance such as a gene. As a bi-functional protein, TAT protein of HIV can be used. The phage is useful in gene therapy.
    Type: Grant
    Filed: September 4, 2001
    Date of Patent: May 25, 2004
    Assignee: DNAVEC Research, Inc.
    Inventors: Teruo Akuta, Haruhiko Yokoi, Hajime Okuyama, Katsuo Takeda, Mamoru Hasegawa, Mahito Nakanishi
  • Phage with nuclear localization signal
    Publication number: 20020042135
    Abstract: A &lgr; phage with a nuclear localization signal has been obtained by constructing a vector capable of expressing a fused protein between a gpD protein constituting the head of a &lgr; phage and a nuclear localization signal sequence, transforming Escherichia coli with this vector, and propagating a mutant &lgr; phage which cannot express the gpD protein in E. coli in this transformant. It has been confirmed that the resulting &lgr; phage is capable of packaging &lgr; phage DNAs of 80% and 100% genome sizes. After further confirming that the nuclear localization signal exposed on the outside of the head of this phage, this phage has been microinjected into cells to analyze its nuclear localization activity. Thus, it has been clarified that this phage has a nuclear localization activity.
    Type: Application
    Filed: April 27, 2001
    Publication date: April 11, 2002
    Inventors: Mahito Nakanishi, Emi Nagoshi, Teruo Akuta, Katsuo Takeda, Mamoru Hasegawa
  • Phage with nuclear localization signal
    Patent number: 6300120
    Abstract: A &lgr; phage with a nuclear localization signal has been obtained by constructing a vector capable of expressing a fused protein between a gpD protein constituting the head of a &lgr; phage and a nuclear localization signal sequence, transforming Escherichia coli with this vector, and propagating a mutant &lgr; phage which cannot express the gpD protein in E. coli in this transformant. It has been confirmed that the resulting &lgr; phage is capable of packaging &lgr; phage DNAs of 80% and 100% genome sizes. After further confirming that the nuclear localization signal exposed on the outside of the head of this phage, this phage has been microinjected into cells to analyze its nuclear localization activity. Thus, it has been clarified that this phage has a nuclear localization activity.
    Type: Grant
    Filed: July 13, 2000
    Date of Patent: October 9, 2001
    Assignee: DNAVEC Research Inc.
    Inventors: Mahito Nakanishi, Emi Nagoshi, Teruo Akuta, Katsuo Takeda, Mamoru Hasegawa
  • Phage bonded to a nuclear location signal
    Patent number: 6235521
    Abstract: A &lgr; phage with a nuclear localization signal has been obtained by constructing a vector capable of expressing a fused protein between a gpD protein constituting the head of a &lgr; phage and a nuclear localization signal sequence, transforming Escherichia coli with this vector, and propagating a mutant &lgr; phage which cannot express the gpD protein in E. coli in this transformant. It has been confirmed that the resulting &lgr; phage is capable of packaging &lgr; phage DNAs of 80% and 100% genome sizes. After further confirming that the nuclear localization signal exposed on the outside of the head of this phage, this phage has been microinjected into cells to analyze its nuclear localization activity. Thus, it has been clarified that this phage has a nuclear localization activity.
    Type: Grant
    Filed: September 10, 1999
    Date of Patent: May 22, 2001
    Assignee: Dnavec Research
    Inventors: Mahito Nakanishi, Emi Nagoshi, Teruo Akuta, Katsuo Takeda, Mamoru Hasegawa