Patents by Inventor Kam Leong

Kam Leong 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).

  • Patent number: 10245319
    Abstract: Provided are nanoparticles comprising heparin, chitosan, and at least one immunomodulatory agent, e.g. a cytokine. The cytokine can be selected from the group consisting of TNF, IL-12, IL-2, IL-23, IL-1?, IL-10, IL-18, and combinations thereof. Further provided are methods of making a nanoparticle comprising mixing a first composition comprising heparin with a second composition comprising chitosan in the presence of at least one cytokine to form a third composition. Further provided are methods of modulating an immune response comprising co-administering to a subject an antigen or vaccine with nanoparticles comprising heparin, chitosan, and at least one cytokine.
    Type: Grant
    Filed: September 7, 2017
    Date of Patent: April 2, 2019
    Assignee: Duke University
    Inventors: Soman Abraham, Kam Leong, Herman Staats, Ashley St. John
  • Publication number: 20180099044
    Abstract: Provided are nanoparticles comprising heparin, chitosan, and at least one immunomodulatory agent, e.g. a cytokine. The cytokine can be selected from the group consisting of TNF, IL-12, IL-2, IL-23, IL-1?, IL-10, IL-18, and combinations thereof. Further provided are methods of making a nanoparticle comprising mixing a first composition comprising heparin with a second composition comprising chitosan in the presence of at least one cytokine to form a third composition. Further provided are methods of modulating an immune response comprising co-administering to a subject an antigen or vaccine with nanoparticles comprising heparin, chitosan, and at least one cytokine.
    Type: Application
    Filed: September 7, 2017
    Publication date: April 12, 2018
    Inventors: Soman Abraham, Kam Leong, Herman Staats, Ashley St. John
  • Patent number: 9901553
    Abstract: The present invention relates, in general, to agents that modulate the pharmacological activity of nucleic acid molecules and, in particular, to agents that bind therapeutic or diagnostic nucleic acid molecules in a sequence independent manner and modulate (e.g., inhibit or reverse) their activity. The invention also relates to compositions comprising such agents and to methods of using same.
    Type: Grant
    Filed: May 13, 2016
    Date of Patent: February 27, 2018
    Assignee: Duke University
    Inventors: Bruce A. Sullenger, Sabah Oney, Tung Suet Ruby Lam, Kam Leong
  • Patent number: 9782475
    Abstract: Provided are nanoparticles comprising heparin, chitosan, and at least one immunomodulatory agent, e.g. a cytokine. The cytokine can be selected from the group consisting of TNF, IL-12, IL-2, IL-23, IL-1?, IL-10, IL-18, and combinations thereof. Further provided are methods of making a nanoparticle comprising mixing a first composition comprising heparin with a second composition comprising chitosan in the presence of at least one cytokine to form a third composition. Further provided are methods of modulating an immune response comprising co-administering to a subject an antigen or vaccine with nanoparticles comprising heparin, chitosan, and at least one cytokine.
    Type: Grant
    Filed: July 21, 2014
    Date of Patent: October 10, 2017
    Assignee: Duke University
    Inventors: Soman Abraham, Kam Leong, Herman Staats, Ashley St. John
  • Patent number: 9567649
    Abstract: Methods for the identification of microorganisms or infectious disorders are disclosed, comprising obtaining a suitable sample from sources such as persons, animals, plants, food, water or soil. The methods also comprise providing tailored nucleic acid substrate(s) designed to react with a type 1 topoisomerase from one or more microorganism(s) or infectious agent(s), and incubating said substrate with said sample, or extracts or preparations from the sample, so that the substrate is processed by said topoisomerase if said microorganism(s) or infectious agent(s) is present in the sample. Microfluidic-implemented methods of detecting an enzyme, in particular a DNA-modifying enzyme, are also provided, as well as methods for detecting a cell, or a microorganism expressing said enzyme. The enzyme is detected by providing a nucleic acid substrate, which is specifically targeted by that enzyme.
    Type: Grant
    Filed: October 26, 2013
    Date of Patent: February 14, 2017
    Inventors: Jørn Erland Koch, Magnus Stougaard, Birgitta Ruth Knudsen, Sissel Juul, Kam Leong, Yi-Ping Ho, Felicie F. Andersen
  • Publication number: 20160250165
    Abstract: The present invention relates, in general, to agents that modulate the pharmacological activity of nucleic acid molecules and, in particular, to agents that bind therapeutic or diagnostic nucleic acid molecules in a sequence independent manner and modulate (e.g., inhibit or reverse) their activity. The invention also relates to compositions comprising such agents and to methods of using same.
    Type: Application
    Filed: May 13, 2016
    Publication date: September 1, 2016
    Applicant: DUKE UNIVERSITY
    Inventors: Bruce A. Sullenger, Sabah Oney, Tung Suet Ruby Lam, Kam Leong
  • Patent number: 9340591
    Abstract: The present invention relates, in general, to agents that modulate the pharmacological activity of nucleic acid molecules and, in particular, to agents that bind therapeutic or diagnostic nucleic acid molecules in a sequence independent manner and modulate (e.g., inhibit or reverse) their activity. The invention also relates to compositions comprising such agents and to methods of using same.
    Type: Grant
    Filed: September 30, 2009
    Date of Patent: May 17, 2016
    Assignee: DUKE UNIVERSITY
    Inventors: Bruce A. Sullenger, Sabah Oney, Tung Suet Ruby Lam, Kam Leong
  • Publication number: 20150023909
    Abstract: Provided are nanoparticles comprising heparin, chitosan, and at least one immunomodulatory agent, e.g. a cytokine. The cytokine can be selected from the group consisting of TNF, IL-12, IL-2, IL-23, IL-1?, IL-10, IL-18, and combinations thereof. Further provided are methods of making a nanoparticle comprising mixing a first composition comprising heparin with a second composition comprising chitosan in the presence of at least one cytokine to form a third composition. Further provided are methods of modulating an immune response comprising co-administering to a subject an antigen or vaccine with nanoparticles comprising heparin, chitosan, and at least one cytokine.
    Type: Application
    Filed: July 21, 2014
    Publication date: January 22, 2015
    Inventors: Soman Abraham, Kam Leong, Herman Staats, Ashley St. John
  • Publication number: 20150018228
    Abstract: Microfluidic-implemented methods of detecting an enzyme, in particular a DNA-modifying enzyme, are provided, as well as methods for detecting a cell, or a microorganism expressing said enzyme. The enzyme is detected by providing a nucleic acid substrate, which is specifically targeted by that enzyme.
    Type: Application
    Filed: August 31, 2012
    Publication date: January 15, 2015
    Inventors: Jørn Erland Koch, Magnus Stougaard, Birgitta Ruth Knudsen, Sissel Juul, Kam Leong, Megan Yi-Ping Ho, Felicie F. Andersen
  • Patent number: 8802076
    Abstract: Provided are nanoparticles comprising heparin, chitosan, and at least one immunomodulatory agent, e.g. a cytokine. The cytokine can be selected from the group consisting of TNF, IL-12, IL-2, IL-23, IL-1?, IL-10, IL-18, and combinations thereof. Further provided are methods of making a nanoparticle comprising mixing a first composition comprising heparin with a second composition comprising chitosan in the presence of at least one cytokine to form a third composition. Further provided are methods of modulating an immune response comprising co-administering to a subject an antigen or vaccine with nanoparticles comprising heparin, chitosan, and at least one cytokine.
    Type: Grant
    Filed: October 4, 2011
    Date of Patent: August 12, 2014
    Assignee: Duke University
    Inventors: Soman Abraham, Kam Leong, Herman Staats, Ashley St. John
  • Publication number: 20140155284
    Abstract: Methods for the identification of microorganisms or infectious disorders are disclosed, comprising obtaining a suitable sample from sources such as persons, animals, plants, food, water or soil. The methods also comprise providing tailored nucleic acid substrate(s) designed to react with a type 1 topoisomerase from one or more microorganism(s) or infectious agent(s), and incubating said substrate with said sample, or extracts or preparations from the sample, so that the substrate is processed by said topoisomerase if said microorganism(s) or infectious agent(s) is present in the sample. Microfluidic-implemented methods of detecting an enzyme, in particular a DNA-modifying enzyme, are also provided, as well as methods for detecting a cell, or a microorganism expressing said enzyme. The enzyme is detected by providing a nucleic acid substrate, which is specifically targeted by that enzyme.
    Type: Application
    Filed: October 26, 2013
    Publication date: June 5, 2014
    Inventors: Jørn Erland Koch, Magnus Stougaard, Birgitta Ruth Knudsen, Sissel Juul, Kam Leong, Yi-Ping Ho, Felicie F. Andersen
  • Publication number: 20120107268
    Abstract: Provided are nanoparticles comprising heparin, chitosan, and at least one immunomodulatory agent, e.g. a cytokine. The cytokine can be selected from the group consisting of TNF, IL-12, IL-2, IL-23, IL-1?, IL-10, IL-18, and combinations thereof. Further provided are methods of making a nanoparticle comprising mixing a first composition comprising heparin with a second composition comprising chitosan in the presence of at least one cytokine to form a third composition. Further provided are methods of modulating an immune response comprising co-administering to a subject an antigen or vaccine with nanoparticles comprising heparin, chitosan, and at least one cytokine.
    Type: Application
    Filed: October 4, 2011
    Publication date: May 3, 2012
    Inventors: Soman Abraham, Kam Leong, Herman Staats, Ashley St. John
  • Patent number: 8003125
    Abstract: A cyclodextrin polymer-based injectable composition comprising cyclodextrin, a polymer which is capable of forming a hydrogel with the cyclodextrin, and a pharmacologically effective amount of at least one drug. The polymer is selected from poly(ethylene glycol), derivatives thereon or a copolymer with a poly(ethylene glycol) segment. The copolymer with a poly(ethylene glycol) segment may include a polymer selected from the group consisting of polyesters, polyurethanes, polyamides, polyethers, polysaccharides, poly(amino acid)s, polypeptides, and proteins. The composition may be injected subcutaneously, intramuscularly, intradermally, or intracranially.
    Type: Grant
    Filed: May 18, 2001
    Date of Patent: August 23, 2011
    Assignee: Agency for Science, Technology and Research
    Inventors: Jun Li, Hanry Yu, Kam Leong
  • Publication number: 20100184822
    Abstract: The present invention relates, in general, to agents that modulate the pharmacological activity of nucleic acid molecules and, in particular, to agents that bind therapeutic or diagnostic nucleic acid molecules in a sequence independent manner and modulate (e.g., inhibit or reverse) their activity. The invention also relates to compositions comprising such agents and to methods of using same.
    Type: Application
    Filed: September 30, 2009
    Publication date: July 22, 2010
    Applicant: DUKE UNIVERSITY
    Inventors: Bruce A. Sullenger, Sabah Oney, Tung Suet Ruby Lam, Kam Leong
  • Publication number: 20080057128
    Abstract: A drug delivery system that includes micelles formed from an amphiphilic copolymer that includes an A polymer block comprising a poly(alkylene oxide) and a B polymer block comprising a poly(hydroxyalkanoate), and a therapeutically effective amount of at least one therapeutic agent intimately contained within the micelles. In one preferred embodiment of the invention, the A polymer block is poly(ethylene oxide) (PEO) and the B polymer block is poly[(R)-3-hydroxybutyrate] (PHB), and the copolymer is the triblock ABA copolymer PEO-PHB-PEO. A method of synthesizing the amphiphilic triblock copolymer is also provided.
    Type: Application
    Filed: October 29, 2007
    Publication date: March 6, 2008
    Inventors: Jun Li, Xu Li, Xiping Ni, Kam Leong
  • Publication number: 20070259032
    Abstract: A method for protection of tissues subject to ischemic and/or reperfusion damage is provided. The method includes administering to the tissue a composition comprising nanodevices. The nanodevices can take the form of, for example, polymeric nanoparticles or lipidic nanoparticles. The nanodevices also find use in methods for reducing ischemic injury in tissue at risk of such injury, such as heart and brain tissue.
    Type: Application
    Filed: May 1, 2007
    Publication date: November 8, 2007
    Inventors: Corinne Bright, Rachel Bright, Eric Churchill, Kam Leong, Daria Rosen
  • Patent number: 7247310
    Abstract: A tumor vaccine which comprises a microparticle or a lysate prepared from a solidified tumor material selected from the group consisting of a tumor tissue, a tumor cell, and a component thereof, and at least one cytokine and/or cytokine-inducing agent (e.g., a granulocyte-macrophage-colony stimulating factor and/or interleukin-2 and the like), and optionally an adjuvant. The vaccine can be easily prepared and widely applied for prevention of recurrence, inhibition of metastasis and therapeutic treatment regardless of a type of a tumor, and has excellent antitumor effect.
    Type: Grant
    Filed: February 9, 2000
    Date of Patent: July 24, 2007
    Assignees: Cell-Medicine, Inc., Riken
    Inventors: Tadao Ohno, Bao Gang Peng, Kam Leong, Shu Qin Liu
  • Publication number: 20070020244
    Abstract: Described herein are fiber compositions, methods of generating the fiber compositions, and methods of using the fiber compositions in various applications utilizing fiber constructs, including for example, tissue engineering.
    Type: Application
    Filed: March 30, 2006
    Publication date: January 25, 2007
    Applicant: The Johns Hopkins University
    Inventors: Andrew Aun Wan, Kam Leong
  • Publication number: 20070009951
    Abstract: An effective prophylactic mucosal gene expression vaccine (GXV), made up of a cocktail of at least 4 different plasmid DNAs encoding corresponding RSV antigens, coacervated with chitosan to formulate nanospheres. In a murine model of RSV infection, intranasal administration with GXV results in significant induction of RSV-specific antibodies, nasal IgA antibodies, cytotoxic T lymphocytes, and IFN-? production in the lung and splenocytes. A single dose of GXV induces a drastic reduction of viral titers.
    Type: Application
    Filed: September 5, 2006
    Publication date: January 11, 2007
    Inventors: Shyam Mohapatra, Mukesh Kumar, Shau-Ku Huang, Kam Leong, Aruna Behera, Li-Chen Chen, Cristina de la Cruz
  • Patent number: 7118888
    Abstract: An effective prophylactic mucosal gene expression vaccine (GXV), made up of a cocktail of at least 4 different plasmid DNAs encoding corresponding RSV antigens, coacervated with chitosan to formulate nanospheres. In a murine model of RSV infection, intranasal administration with GXV results in significant induction of RSV-specific antibodies, nasal IgA antibodies, cytotoxic T lymphocytes, and IFN-? production in the lung and splenocytes. A single dose of GXV induces a drastic reduction of viral titers.
    Type: Grant
    Filed: February 12, 2002
    Date of Patent: October 10, 2006
    Assignees: University of South Florida Board of Trustees, Johns Hopkins University
    Inventors: Shyam S. Mohapatra, Mukesh Kumar, Shua-ku Huang, Kam Leong