Patents Assigned to VIRxSYS Corporation
  • Patent number: 8883753
    Abstract: Methods and compositions for generating novel nucleic acid molecules through targeted spliceosome mediated RNA trans-splicing that result in expression of a apoAI protein, an apoAI variant, the preferred embodiment referred to herein as the apoAI Milano variant, a pre-pro-apoAI or an analog of apoAI. The methods and compositions include pre-trans-splicing molecules (PTMs) designed to interact with a target precursor messenger RNA molecule (target pre-mRNA) and mediate a trans-splicing reaction resulting in the generation of a novel chimeric RNA molecule (chimeric RNA) capable of encoding apoAI, the apoAI Milano variant, or an analog of apoAI. The expression of this apoAI protein results in protection against vascular disorders resulting from plaque build up, i.e., atherosclerosis, strokes and heart attacks.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: November 11, 2014
    Assignee: Virxsys Corporation
    Inventors: Madaiah Puttaraju, Edward Otto, Mariano A. Garcia-Blanco, Gerard J. McGarrity, Gary F. Temple
  • Publication number: 20120046347
    Abstract: Methods and compositions for generating novel nucleic acid molecules through targeted spliceosome mediated RNA trans-splicing that result in expression of a apoAI protein, an apoAI variant, the preferred embodiment referred to herein as the apoAI Milano variant, a pre-pro-apoAI or an analogue of apoAI. The methods and compositions include pre-trans-splicing molecules (PTMs) designed to interact with a target precursor messenger RNA molecule (target pre-mRNA) and mediate a trans-splicing reaction resulting in the generation of a novel chimeric RNA molecule (chimeric RNA) capable of encoding apoAI, the apoAI Milano variant, or an analogue of apoAI. The expression of this apoAI protein results in protection against vascular disorders resulting from plaque build up, i.e., atherosclerosis, strokes and heart attacks.
    Type: Application
    Filed: June 22, 2011
    Publication date: February 23, 2012
    Applicant: Virxsys Corporation
    Inventors: Madaiah Pattaraju, Edward Otto, Mariano A. Garcia-Blanco, Gerard J. McGarrity, Gary F. Temple
  • Patent number: 8053232
    Abstract: The present invention provides methods and compositions for generating novel nucleic acid molecules through targeted spliceosomal mediated RNA trans-splicing. The compositions of the invention include pre-trans-splicing molecules (PTMs) designed to interact with a SERPINA1 target precursor messenger RNA molecule (target pre-mRNA) and mediate a trans-splicing reaction resulting in the generation of a novel chimeric RNA molecule (chimeric RNA). In particular, the PTMs of the present invention include those genetically engineered to interact with SERPINA1 target pre-mRNA so as to result in correction of SERPINA1 genetic defects responsible for AAT deficiency. The PTMs of the invention may also comprise sequences that are processed out of the PTM to yield duplex siRNA molecules directed specifically to mutant SERPIN A1 mRNAs. Such duplexed siRNAs are designed to reduce the accumulation of toxic AAT protein in liver cells.
    Type: Grant
    Filed: January 21, 2005
    Date of Patent: November 8, 2011
    Assignee: VIRxSYS Corporation
    Inventors: Madaiah Puttaraju, Edward Otto, Mariano A. Garcia-Blanco, Gerard J. McGarrity, Gary F. Temple, Lloyd G. Mitchell, Colette Cote, S. Gary Mansfield
  • Publication number: 20110263015
    Abstract: The present invention describes the use of pre-trans-splicing molecules (PTMs) to reprogram human normal and diseased somatic cells into pluripotent stem cells using spliceosome-mediated RNA trans-splicing. More specifically, the present invention describes the use of the SMaRTâ„¢ technology to repair or reprogram the newly induced diseased pluripotent stem cells.
    Type: Application
    Filed: August 20, 2009
    Publication date: October 27, 2011
    Applicant: VIRXSYS CORPORATION
    Inventors: Jenice G. D'Costa, Laurent M. Humeau, Stephen Gary Mansfield, Madaiah Puttaraju, Nikolay Korokhov, Gerard J. McGarrity
  • Patent number: 8043611
    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: December 13, 2004
    Date of Patent: October 25, 2011
    Assignee: Virxsys Corporation
    Inventors: Yung-Nien Chang, Yajin Ni, Boro Dropulic
  • Publication number: 20110244519
    Abstract: The present invention provides methods and compositions for generating novel nucleic acid molecules through RNA trans-splicing that target a highly expressed pre-mRNA and contain the coding sequence for antibody polypeptide(s). The compositions of the invention include pre-trans-splicing molecules (PTMs) designed to interact with the target precursor messenger RNA molecule (target pre-mRNA) that is abundantly expressed or tumor specific and mediate a trans-splicing reaction resulting in the generation of novel chimeric RNA molecule (chimeric RNA) capable of encoding an antibody polypeptide. The invention provides for the in vivo production of chimeric RNA molecules that encode and result in the production of an antibody polypeptide that is therapeutically effective against, for example, infectious agents, cancer cells, transplantation antigens, rheumatoid arthritis, etc.
    Type: Application
    Filed: January 11, 2011
    Publication date: October 6, 2011
    Applicant: VIRxSYS Corporation
    Inventors: Gerard J. McGarrity, Mariano A. Garcia-Blanco, Madaiah Puttaraju
  • Publication number: 20110207226
    Abstract: The present invention provides for a hybrid vector system for the purpose of therapeutic gene delivery where the system is used for a targeted integration of a therapeutic gene into a genome. The hybrid vector system comprises a hybrid vector made up of a non-integrating lentiviral vector and an adeno-associated vector, and a therapeutic gene.
    Type: Application
    Filed: August 20, 2009
    Publication date: August 25, 2011
    Applicant: Virxsys Corporation
    Inventors: Yajin NI, Jenice G. D' Costa, Ramdall K. Merling
  • Patent number: 7968334
    Abstract: Methods and compositions for generating novel nucleic acid molecules through targeted spliceosome mediated RNA trans-splicing that result in expression of a apoAI protein, an apoAI variant, the preferred embodiment referred to herein as the apoAI Milano variant, a pre-pro-apoAI or an analogue of apoAI. The methods and compositions include pre-trans-splicing molecules (PTMs) designed to interact with a target precursor messenger RNA molecule (target pre-mRNA) and mediate a trans-splicing reaction resulting in the generation of a novel chimeric RNA molecule (chimeric RNA) capable of encoding apoAI, the apoAI Milano variant, or an analogue of apoAI. The expression of this apoAI protein results in protection against vascular disorders resulting from plaque build up, i.e., atherosclerosis, strokes and heart attacks.
    Type: Grant
    Filed: May 31, 2005
    Date of Patent: June 28, 2011
    Assignee: VIRxSYS Corporation
    Inventors: Madaiah Puttaraju, Edward Otto, Mariano A. Garcia-Blanco, Gerard J. McGarrity, Gary F. Temple
  • Patent number: 7879321
    Abstract: The present invention provides methods and compositions for generating novel nucleic acid molecules through RNA trans-splicing that target a highly expressed pre-mRNA and contain the coding sequence for antibody polypeptide(s). The compositions of the invention include pre-trans-splicing molecules (PTMs) designed to interact with the target precursor messenger RNA molecule (target pre-mRNA) that is abundantly expressed or tumor specific and mediate a trans-splicing reaction resulting in the generation of novel chimeric RNA molecule (chimeric RNA) capable of encoding an antibody polypeptide. The invention provides for the in vivo production of chimeric RNA molecules that encode and result in the production of an antibody polypeptide that is therapeutically effective against, for example, infectious agents, cancer cells, transplantation antigens, rheumatoid arthritis, etc.
    Type: Grant
    Filed: October 7, 2005
    Date of Patent: February 1, 2011
    Assignee: VIRxSYS Corporation
    Inventors: Gerard J. McGarrity, Mariano A. Garcia-Blanco, Madaiah Puttaraju
  • Patent number: 7871795
    Abstract: The present invention provides methods and compositions for generating novel nucleic acid molecules through RNA trans-splicing that target a highly expressed pre-mRNA and contain the coding sequence of a protein or polypeptide of interest. The compositions of the invention include pre-trans-splicing molecules (PTMs) designed to interact with the target precursor messenger RNA molecule (target pre-mRNA) that is abundantly expressed, and mediate a trans-splicing reaction resulting in the generation of novel chimeric RNA molecule (chimeric RNA) capable of encoding a protein or polypeptide of interest. The invention provides for the in vivo production of chimeric RNA molecules that encode and result in the production of a protein or polypeptide of interest.
    Type: Grant
    Filed: October 7, 2005
    Date of Patent: January 18, 2011
    Assignee: VIRxSYS Corporation
    Inventors: Gerard J. McGarrity, Mariano A. Garcia-Blanco
  • Publication number: 20090203143
    Abstract: The present invention provides methods and compositions for conferring selective death on cells expressing a specific target precursor messenger RNA (selective target pre-mRNA). The compositions of the invention include pre-trans-splicing molecules (PTMs) designed to interact with a target precursor messenger RNA molecule (target pre-mRNA) expressed within a cell and mediate a trans-splicing reaction resulting in the generation of a novel chimeric mRNA molecule (chimeric mRNA) capable of encoding a light producing protein or enzyme. Cell death is further mediated by the presence of a photosensitizer which upon photoactivation produces cytotoxicity.
    Type: Application
    Filed: June 9, 2008
    Publication date: August 13, 2009
    Applicant: VIRXSYS CORPORATION
    Inventors: Lloyd G. Mitchell, Edward Otto, Carl R. Merril
  • Publication number: 20090081682
    Abstract: The present invention relates to methods and compositions for the efficient identification of one or more functionalities of a product encoded by a nucleic acid sequence of interest. The methods utilize the abilities to over and/or under express the product in a cell, as well as the combination of these results, to permit the identification of at least one of the product's cellular or in vivo functionality.
    Type: Application
    Filed: September 19, 2008
    Publication date: March 26, 2009
    Applicant: VIRXSYS CORPORATION
    Inventor: Boro DROPULIC
  • Publication number: 20080274091
    Abstract: The invention provides novel processes for manufacturing autologous T cells, transducing T cells and expanding the transduced T cell population.
    Type: Application
    Filed: May 22, 2006
    Publication date: November 6, 2008
    Applicant: VIRxSYS Corporation
    Inventors: Vladimir Slepushkin, Laurent Humeau
  • Patent number: 7427474
    Abstract: The present invention relates to methods and compositions for the efficient identification of one or more functionalities of a product encoded by a nucleic acid sequence of interest. The methods utilize the abilities to over and/or under express the product in a cell, as well as the combination of these results, to permit the identification of at least one of the product's cellular or in vivo functionality.
    Type: Grant
    Filed: July 25, 2003
    Date of Patent: September 23, 2008
    Assignee: VIRxSYS Corporation
    Inventor: Boro Dropulic
  • Patent number: 7399753
    Abstract: The present invention provides methods and compositions for conferring selective death on cells expressing a specific target precursor messenger RNA (selective target pre-mRNA). The compositions of the invention include pre-trans-splicing molecules (PTMs) designed to interact with a target precursor messenger RNA molecule (target pre-mRNA) expressed within a cell and mediate a trans-splicing reaction resulting in the generation of a novel chimeric mRNA molecule (chimeric mRNA) capable of encoding a light producing protein or enzyme. Cell death is further mediated by the presence of a photosensitizer which upon photoactivation produces cytotoxicity.
    Type: Grant
    Filed: September 9, 2003
    Date of Patent: July 15, 2008
    Assignee: Virxsys Corporation
    Inventors: Lloyd G. Mitchell, Edward Otto, Carl R. Merril
  • Publication number: 20070036783
    Abstract: This invention is directed to a soluble complex of ligands that binds to surface molecules of hemopoietic cells and result in their activation or expansion. The complex may be used in the activation and/or expansion of hemopoietic cells, optionally in combination with their transduction. The complex of ligands bind at least two cell surface molecules, such as one that plays a role in cell-cell adhesion and one that may or may not activate or stimulate the cell to promote growth and/or proliferation after binding to a ligand. A complex of ligands that bind two hemopoietic cell stimulatory molecules is also provided. The invention further provides for the use of the complex to target vectors to hemopoietic cells.
    Type: Application
    Filed: June 16, 2006
    Publication date: February 15, 2007
    Applicant: VIRxSYS, Corporation
    Inventors: Laurent Humeau, Brian Paszkiet, Franck Lemiale
  • Publication number: 20060281128
    Abstract: The present invention relates to multiple novel approaches for the generation of an immune response in an animal, such as a human, using lentivirus-based vector technology. The invention provides for the ability to mimic the efficacy of a live attenuated (LA) vaccine, without exposing the patient to the risk of disease as possible with some LA vaccines. The invention thus provides for systems of complementary conditionally replicating vectors, vectors that produce replication deficient virus like particles, and multi-antigen constructs that target a virus or microbial pathogen. The use of these materials in the practice of the invention permits the generation of robust cellular and humoral responses to the antigens presented thereby.
    Type: Application
    Filed: August 17, 2006
    Publication date: December 14, 2006
    Applicant: VIRXSYS CORPORATION
    Inventors: Xiaobin Lu, Boro Dropulic
  • Publication number: 20060003452
    Abstract: The invention relates to a method of increasing vector transduction in target cells. The invention provides for the recombinant engineering of a packaging cell line to be capable of expressing one or more membrane proteins which facilitate binding to, and activation of, a target cell. The invention also provides for recombinant engineering of a cell that endogenously expresses one or more such membrane proteins into a packaging cell line. A vector packaged into viral particles via use of such cell lines would comprise an outer envelope containing these proteins. The particles would be specifically suited for binding and targeting to a target cell to facilitate transduction thereof with the vector. The target cell may also be simultaneously activated (stimulated) by the packaged vector in the absence of exogenously supplied stimulatory molecules.
    Type: Application
    Filed: June 30, 2005
    Publication date: January 5, 2006
    Applicant: VIRxSYS Corporation
    Inventors: Laurent Humeau, Vladimir Slepushkin, Brian Paszkiet, Yajin Ni
  • 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
  • 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