Patents by Inventor Yung-Nien Chang

Yung-Nien Chang 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: 20080103109
    Abstract: The invention generally relates to targeted gene therapy using recombinant vectors and particularly adenovirus vectors. The invention specifically relates to replication-conditional vectors and methods for using them. Such vectors are able to selectively replicate in a target tissue to provide a therapeutic benefit from the presence of the vector per se or from heterologous gene products expressed from the vector and distributed throughout the tissue. In such vectors, a gene essential for replication is placed under the control of a heterologous tissue-specific transcriptional regulatory sequence. Thus, replication is conditioned on the presence of a factor(s) that induces transcription or the absence of a factor(s) that inhibits transcription of the gene by means of the transcriptional regulatory sequence with this vector; therefore, a target tissue can be selectively treated.
    Type: Application
    Filed: October 25, 2007
    Publication date: May 1, 2008
    Inventors: Paul Hallenbeck, Yung-Nien Chang, Yawen Chiang
  • Publication number: 20080076172
    Abstract: The invention generally relates to targeted gene therapy using recombinant vectors and particularly adenovirus vectors. The invention specifically relates to replication-conditional vectors and methods for using them. Such vectors are able to selectively replicate in a target tissue to provide a therapeutic benefit from the presence of the vector per se or from heterologous gene products expressed from the vector and distributed throughout the tissue. In such vectors, a gene essential for replication is placed under the control of a heterologous tissue-specific transcriptional regulatory sequence. Thus, replication is conditioned on the presence of a factor(s) that induces transcription or the absence of a factor(s) that inhibits trancription of the gene by means of the transcriptional regulatory sequence with this vector; therefore, a target tissue can be selectively treated.
    Type: Application
    Filed: October 24, 2007
    Publication date: March 27, 2008
    Applicant: Cell Genesys, Inc.
    Inventors: Paul Hallenbeck, Yung-Nien Chang, Yawen Chiang
  • Publication number: 20070086985
    Abstract: The invention generally relates to targeted gene therapy using recombinant vectors and particularly adenovirus vectors. The invention specifically relates to replication-conditional vectors and methods for using them. Such vectors are able to selectively replicate in a target tissue to provide a therapeutic benefit from the presence of the vector per se or from heterologous gene products expressed from the vector and distributed throughout the tissue. In such vectors, a gene essential for replication is placed under the control of a heterologous tissue-specific transcriptional regulatory sequence. Thus, replication is conditioned on the presence of a factor(s) that induces transcription or the absence of a factor(s) that inhibits transcription of the gene by means of the transcriptional regulatory sequence with this vector; therefore, a target tissue can be selectively treated.
    Type: Application
    Filed: November 17, 2006
    Publication date: April 19, 2007
    Applicant: Cell Genesys, Inc.
    Inventors: Paul Hallenbeck, Yung-Nien Chang, Yawen Chiang
  • Publication number: 20060121579
    Abstract: The present invention provides nucleic acid constructs, expression systems, and methods relating to the regulation of gene expression. The invention may be applied to regulate the expression of any coding sequence of interest, including those coding for viral components necessary for the packaging of viral particles.
    Type: Application
    Filed: December 13, 2004
    Publication date: June 8, 2006
    Inventors: Yung-Nien Chang, Yajin Ni, Boro Dropulic
  • Publication number: 20060002897
    Abstract: The invention generally relates to targeted gene therapy using recombinant vectors and particularly adenovirus vectors. The invention specifically relates to replication-conditional vectors and methods for using them. Such vectors are able to selectively replicate in a target tissue to provide a therapeutic benefit from the presence of the vector per se or from heterologous gene products expressed from the vector and distributed throughout the tissue. In such vectors, a gene essential for replication is placed under the control of a heterologous tissue-specific transcriptional regulatory sequence. Thus, replication is conditioned on the presence of a factor(s) that induces transcription or the absence of a factor(s) that inhibits transcription of the gene by means of the transcriptional regulatory sequence with this vector; therefore, a target tissue can be selectively treated.
    Type: Application
    Filed: September 2, 2005
    Publication date: January 5, 2006
    Inventors: Paul Hallenbeck, Yung-Nien Chang, Yawen Chiang
  • Patent number: 6835568
    Abstract: The present invention provides nucleic acid constructs, expression systems, and methods relating to the regulation of gene expression. The invention may be applied to regulate the expression of any coding sequence of interest, including those coding for viral components necessary for the packaging of viral particles.
    Type: Grant
    Filed: October 30, 2001
    Date of Patent: December 28, 2004
    Assignee: Virxsys Corporation
    Inventors: Yung-Nien Chang, Yajin Ni, Boro Dropulic
  • Publication number: 20040062756
    Abstract: The present invention provides methods, as well as compositions related thereto, for the efficient transduction of cells using viral vectors. The efficiency of transduction is increased by contacting the cell to be transduced with one or more molecules that bind the cell surface. Contact with a cell surface binding molecule may occur before, after, or simultaneously with contact between the viral vector and the cell. The transduced vectors may be constructed to express a gene of interest, permitting the transduced cells to be used as therapeutic and prophylactic agents.
    Type: Application
    Filed: September 16, 2003
    Publication date: April 1, 2004
    Inventors: Laurent Humeau, Wei Han, Xiaobin Lu, Vladimir Slepushkin, Mechelle Lesher, Brian Davis, Yung-Nien Chang, Boro Dropulic
  • Publication number: 20040009588
    Abstract: The invention generally relates to cell-specific expression vectors. It particularly relates to targeted gene therapy using recombinant expression vectors and particularly adenovirus vectors. The invention specifically relates to replication-conditional expression vectors and methods for using them. Such vectors are able to selectively replicate in a target cell or tissue to provide a therapeutic benefit in a tissue from the presence of the vector per se or from one or more heterologous gene products expressed from the vector and distributed throughout the tissue. In such vectors, a gene essential for replication is placed under the control of a heterologous tissue-specific transcriptional regulatory sequence. Thus, replication is conditioned on the presence of a factor(s) that induces transcription or the absence of a factor(s) that inhibits transcription of the gene by means of the transcriptional regulatory sequence with this vector; therefore, a target tissue can be selectively treated.
    Type: Application
    Filed: June 24, 2003
    Publication date: January 15, 2004
    Applicant: Genetic Therapy, Inc.
    Inventors: Yung-Nien Chang, Paul L. Hallenbeck, Carl M. Hay, David A. Stewart
  • Patent number: 6638762
    Abstract: The invention generally relates to cell-specific expression vectors. It particularly relates to targeted gene therapy using recombinant expression vectors and particularly adenovirus vectors. The invention specifically relates to replication-conditional expression vectors and methods for using them. Such vectors are able to selectively replicate in a target cell or tissue to provide a therapeutic benefit in a tissue from the presence of the vector per se or from one or more heterologous gene products expressed from the vector and distributed throughout the tissue. In such vectors, a gene essential for replication is placed under the control of a heterologous tissue-specific transcriptional regulatory sequence. Thus, replication is conditioned on the presence of a factor(s) that induces transcription or the absence of a factor(s) that inhibits transcription of the gene by means of the transcriptional regulatory sequence with this vector; therefore, a target tissue can be selectively treated.
    Type: Grant
    Filed: November 19, 1997
    Date of Patent: October 28, 2003
    Assignee: Genetic Therapy, Inc.
    Inventors: Yung-Nien Chang, Paul L. Hallenbeck, Carl M. Hay, David A. Stewart
  • Patent number: 6627442
    Abstract: The present invention provides methods, as well as compositions related thereto, for the efficient transduction of cells using viral vectors. The efficiency of transduction is increased by contacting the cell to be transduced with one or more molecules that bind the cell surface. Contact with a cell surface binding molecule may occur before, after, or simultaneously with contact between the viral vector and the cell. The transduced vectors may be constructed to express a gene of interest, permitting the transduced cells to be used as therapeutic and prophylactic agents.
    Type: Grant
    Filed: August 31, 2000
    Date of Patent: September 30, 2003
    Assignee: VIRxSYS Corporation
    Inventors: Laurent Humeau, Wei Han, Xiaobin Lu, Vladimir Slepushkin, Mechelle Lesher, Brian Davis, Yung-Nien Chang, Boro Dropulic
  • Publication number: 20030129175
    Abstract: The invention generally relates to targeted gene therapy using recombinant vectors and particularly adenovirus vectors. The invention specifically relates to replication-conditional vectors and methods for using them. Such vectors are able to selectively replicate in a target tissue to provide a therapeutic benefit from the presence of the vector per se or from heterologous gene products expressed from the vector and distributed throughout the tissue. In such vectors, a gene essential for replication is placed under the control of a heterologous tissue-specific transcriptional regulatory sequence. Thus, replication is conditioned on the presence of a factor(s) that induces transcription or the absence of a factor(s) that inhibits transcription of the gene by means of the transcriptional regulatory sequence with this vector; therefore, a target tissue can be selectively treated.
    Type: Application
    Filed: December 19, 2002
    Publication date: July 10, 2003
    Inventors: Paul L. Hallenbeck, Yung-Nien Chang, Yawen L. Chiang
  • Publication number: 20030118570
    Abstract: The invention generally relates to targeted gene therapy using recombinant vectors and particularly adenovirus vectors. The invention specifically relates to replication-conditional vectors and methods for using them. Such vectors are able to selectively replicate in a target tissue to provide a therapeutic benefit from the presence of the vector per se or from heterologous gene products expressed from the vector and distributed throughout the tissue. In such vectors, a gene essential for replication is placed under the control of a heterologous tissue-specific transcriptional regulatory sequence. Thus, replication is conditioned on the presence of a factor(s) that induces transcription or the absence of a factor(s) that inhibits transcription of the gene by means of the transcriptional regulatory sequence with this vector; therefore, a target tissue can be selectively treated.
    Type: Application
    Filed: December 19, 2002
    Publication date: June 26, 2003
    Inventors: Paul L. Hallenbeck, Yung-Nien Chang, Yawen L. Chiang
  • Publication number: 20030113296
    Abstract: The invention generally relates to targeted gene therapy using recombinant vectors and particularly adenovirus vectors. The invention specifically relates to replication-conditional vectors and methods for using them. Such vectors are able to selectively replicate in a target tissue to provide a therapeutic benefit from the presence of the vector per se or from heterologous gene products expressed from the vector and distributed throughout the tissue. In such vectors, a gene essential for replication is placed under the control of a heterologous tissue-specific transcriptional regulatory sequence. Thus, replication is conditioned on the presence of a factor(s) that induces transcription or the absence of a factor(s) that inhibits transcription of the gene by means of the transcriptional regulatory sequence with this vector; therefore, a target tissue can be selectively treated.
    Type: Application
    Filed: December 19, 2002
    Publication date: June 19, 2003
    Inventors: Paul L. Hallenbeck, Yung-Nien Chang, Yawen L. Chiang
  • Publication number: 20030087419
    Abstract: The present invention provides nucleic acid constructs, expression systems, and methods relating to the regulation of gene expression. The invention may be applied to regulate the expression of any coding sequence of interest, including those coding for viral components necessary for the packaging of viral particles.
    Type: Application
    Filed: October 30, 2001
    Publication date: May 8, 2003
    Inventors: Yung-Nien Chang, Yajin Ni, Boro Dropulic
  • Patent number: 6551587
    Abstract: The invention generally relates to targeted gene therapy using recombinant vectors and particularly adenovirus vectors. The invention specifically relates to replication-conditional vectors and methods for using them. Such vectors are able to selectively replicate in a target tissue to provide a therapeutic benefit from the presence of the vector per se or from heterologous gene products expressed from the vector and distributed throughout the tissue. In such vectors, a gene essential for replication is placed under the control of a heterologous tissue-specific transcriptional regulatory sequence. Thus, replication is conditioned on the presence of a factor(s) that induces transcription or the absence of a factor(s) that inhibits transcription of the gene by means of the transcriptional regulatory sequence with this vector, therefore, a target tissue can be selectively treated.
    Type: Grant
    Filed: December 15, 1998
    Date of Patent: April 22, 2003
    Assignee: Genetic Therapy, Inc.
    Inventors: Paul L. Hallenbeck, Yung-Nien Chang, Yawen L. Chiang
  • Publication number: 20030012767
    Abstract: The invention generally relates to targeted gene therapy using recombinant vectors and particularly adenovirus vectors. The invention specifically relates to replication-conditional vectors and methods for using them. Such vectors are able to selectively replicate in a target tissue to provide a therapeutic benefit from the presence of the vector per se or from heterologous gene products expressed from the vector and distributed throughout the tissue. In such vectors, a gene essential for replication is placed under the control of a heterologous tissue-specific transcriptional regulatory sequence. Thus, replication is conditioned on the presence of a factor(s) that induces transcription or the absence of a factor(s) that ihibits transcription of the gene by means of the transcriptional regulatory sequence with this vector; therefore, a target tissue can be selectively treated.
    Type: Application
    Filed: December 15, 1998
    Publication date: January 16, 2003
    Inventors: PAUL L. HALLENBECK, YUNG-NIEN CHANG, YAWEN L. CHIANG
  • Patent number: 5998205
    Abstract: The invention generally relates to targeted gene therapy using recombinant vectors and particularly adenovirus vectors. The invention specifically relates to replication-conditional vectors and methods for using them. Such vectors are able to selectively replicate in a target tissue to provide a therapeutic benefit from the presence of the vector per se or from heterologous gene products expressed from the vector and distributed throughout the tissue. In such vectors, a gene essential for replication is placed under the control of a heterologous tissue-specific transcriptional regulatory sequence. Thus, replication is conditioned on the presence of a factor(s) that induces transcription or the absence of a factor(s) that ihibits transcription of the gene by means of the transcriptional regulatory sequence with this vector; therefore, a target tissue can be selectively treated.
    Type: Grant
    Filed: August 1, 1997
    Date of Patent: December 7, 1999
    Assignee: Genetic Therapy, Inc.
    Inventors: Paul L. Hallenbeck, Yung-Nien Chang, Yawen L. Chiang