Patents by Inventor David J. Yang

David J. Yang 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: 20110087003
    Abstract: The invention include glycopeptides having a glycoside and a peptide covalently bound through an amide bond. The glycopeptides may also include a diagnostic or therapeutic agent bound to the glycopeptide. A metal, such as a radionuclide, may also be chelated to the glycopeptide. Specific embodiments of the invention relate to glycopeptides made of chitosan covalently bound to a poly(amino acid) such as poly(glutamic acid) or poly(aspartic acid). Diagnostic agents conjugated to the glycopeptide may facilitate imaging. Specific therapeutic agents that may be conjugated to the glycopeptide include anticancer drugs, rheumatoid arthritis drugs, anticoagulants, anti-angiogenesis drugs, apoptosis drugs, osteoporosis drugs, steroids, and anti-inflammatory drugs. Some agents, such as radionuclides, may have both diagnostic and therapeutic effects.
    Type: Application
    Filed: December 16, 2010
    Publication date: April 14, 2011
    Inventors: I-Chien Wei, David J. Yang, Dong-Fang Yu
  • Publication number: 20100278731
    Abstract: Compositions for imaging pancreatic beta cells comprise chelator-antidiabetic agent conjugates and optionally chelated metals.
    Type: Application
    Filed: November 2, 2009
    Publication date: November 4, 2010
    Inventors: David J. Yang, Chang-Sok Oh, Saady Kohanim, Dong-Fang Yu, Ali Azhdarinia, Jerry Bryant
  • Publication number: 20100055035
    Abstract: The invention provides, in a general sense, a new labeling strategy employing 99mTc chelated with ethylenedicysteine (EC). EC is conjugated with a variety of ligands and chelated to 99mTc for use as an imaging agent for tissue-specific diseases. The drug conjugates of the invention may also be used as a prognostic tool or as a tool to deliver therapeutics to specific sites within a mammalian body. Kits for use in tissue-specific disease imaging are also provided.
    Type: Application
    Filed: September 21, 2009
    Publication date: March 4, 2010
    Inventors: David J. Yang, Chun W. Liu, Dong-Fang Yu, E. Edmund Kim
  • Patent number: 7632484
    Abstract: The invention provides, in a general sense, a new labeling strategy employing 99mTc chelated with ethylenedicysteine (EC). EC is conjugated with a variety of ligands and chelated to 99mTc for use as an imaging agent for tissue-specific diseases. The drug conjugates of the invention may also be used as a prognostic tool or as a tool to deliver therapeutics to specific sites within a mammalian body. Kits for use in tissue-specific disease imaging are also provided.
    Type: Grant
    Filed: April 17, 2006
    Date of Patent: December 15, 2009
    Assignee: Board of Regents, The University of Texas System
    Inventors: David J. Yang, Chun W. Liu, Dong-Fang Yu, E. Edmund Kim
  • Patent number: 7615208
    Abstract: The invention provides, in a general sense, a new labeling strategy employing 99mTc chelated with ethylenedicysteine (EC). EC is conjugated with a variety of ligands and chelated to 99mTc for use as an imaging agent for tissue-specific diseases. The drug conjugates of the invention may also be used as a prognostic tool or as a tool to deliver therapeutics to specific sites within a mammalian body. Kits for use in tissue-specific disease imaging are also provided.
    Type: Grant
    Filed: June 8, 2007
    Date of Patent: November 10, 2009
    Assignee: Board of Regents, The University of Texas System
    Inventors: David J. Yang, Chun W. Liu, Dong-Fang Yu, E. Edmund Kim
  • Patent number: 7611693
    Abstract: Compositions for imaging pancreatic beta cells comprise chelator-antidiabetic agent conjugates and optionally chelated metals.
    Type: Grant
    Filed: September 16, 2004
    Date of Patent: November 3, 2009
    Assignee: Board of Regents, The Univerisity of Texas System
    Inventors: David J. Yang, Chang-Sok Oh, Saady Kohanim, Dong-Fang Yu, Ali Azhdarinia, Jerry Bryant
  • Publication number: 20090238756
    Abstract: Compositions and methods for imaging and for chemotherapy and radiotherapy are disclosed. More particularly, the invention concerns agents comprising a targeting moeity comprising a beta-adrenergic receptor targeting compound conjugated or embedded with ethylenediamine. The present invention also concerns methods of application of such agents for imaging and treatment of cardiovascular diseases, and kits for preparing a radiolabeled therapeutic or diagnostic agent.
    Type: Application
    Filed: December 19, 2008
    Publication date: September 24, 2009
    Inventors: David J. Yang, Chang-Sok Oh, Saady Kohanim, Dong-Fang Yu, Richard Mendez, E. Edmund Kim
  • Patent number: 7582281
    Abstract: The invention provides, in a general sense, a new labeling strategy employing 99mTc chelated with ethylenedicysteine (EC). EC is conjugated with a variety of ligands and chelated to 99mTc for use as an imaging agent for tissue-specific diseases. The drug conjugates of the invention may also be used as a prognostic tool or as a tool to deliver therapeutics to specific sites within a mammalian body. Kits for use in tissue-specific disease imaging are also provided.
    Type: Grant
    Filed: January 25, 2007
    Date of Patent: September 1, 2009
    Assignee: Board of Regents, The University of Texas System
    Inventors: David J. Yang, Chun W. Liu, Dong-Fang Yu, E. Edmund Kim
  • Publication number: 20080300389
    Abstract: The current disclosure, in one embodiment, includes a polysaccharide conjugate. This conjugate has a polysaccharide and at least one monomeric amino acid having an O-group covalently bound to the polysaccharide. The conjugate also has at least one metal conjugated by the O-group of the amino acid. According to another embodiment, the disclosure provides a method of synthesizing a polysaccharide conjugate by covalently bonding a monomeric amino acid having an O-group to a polysaccharide and by conjugating a metal to the O-group to form a polysaccharide conjugate. According to a third embodiment, the disclosure relates to a method of killing a cancer cell by administering to the cell an effective amount of a polysaccharide conjugate. This conjugate has a polysaccharide and at least one monomeric amino acid having an O-group covalently bound to the polysaccharide. The conjugate also has at least one metal conjugated by the O-group of the amino acid.
    Type: Application
    Filed: January 18, 2008
    Publication date: December 4, 2008
    Inventors: David J. Yang, Dong-Fang Yu, I-Chien Wei
  • Patent number: 7384977
    Abstract: Disclosed are water soluble compositions of paclitaxel and docetaxel formed by conjugating the paclitaxel or docetaxel to a water soluble polymer such as poly-glutamic acid, poly-aspartic acid or poly-lysine. Also disclosed are methods of using the compositions for treatment of tumors, auto-immune disorders such as rheumatoid arthritis. Other embodiments include the coating of implantable stents for prevention of restenosis.
    Type: Grant
    Filed: August 31, 2006
    Date of Patent: June 10, 2008
    Assignee: PG-TXL Company, L.P.
    Inventors: Chun Li, Sidney Wallace, Dong-Fang Yu, David J. Yang
  • Publication number: 20080107598
    Abstract: Novel methods of synthesis of chelator-targeting ligand conjugates, compositions comprising such conjugates, and therapeutic and diagnostic applications of such conjugates are disclosed. The compositions include chelator-targeting ligand conjugates optionally chelated to one or more metal ions. Methods of synthesizing these compositions in high purity are also presented. Also disclosed are methods of imaging, treating and diagnosing disease in a subject using these novel compositions, such as methods of imaging a tumor within a subject and methods of diagnosing myocardial ischemia.
    Type: Application
    Filed: June 28, 2007
    Publication date: May 8, 2008
    Inventors: David J. Yang, Dongfang Yu
  • Patent number: 7229604
    Abstract: The invention provides, in a general sense, a new labeling strategy employing 99mTc chelated with ethylenedicysteine (EC). EC is conjugated with a variety of ligands and chelated to 99mTc for use as an imaging agent for tissue-specific diseases. The drug conjugates of the invention may also be used as a prognostic tool or as a tool to deliver therapeutics to specific sites within a mammalian body. Kits for use in tissue-specific disease imaging are also provided.
    Type: Grant
    Filed: September 26, 2003
    Date of Patent: June 12, 2007
    Assignee: Board of Regents, The University of Texas System
    Inventors: David J. Yang, Chun W. Liu, Dong-Fang Yu, E. Edmund Kim
  • Patent number: 7223380
    Abstract: The invention provides, in a general sense, a new labeling strategy employing 99mTc chelated with ethylenedicysteine (EC). EC is conjugated with a variety of ligands and chelated to 99mTc for use as an imaging agent for tissue-specific diseases. The drug conjugates of the invention may also be used as a prognostic tool or as a tool to deliver therapeutics to specific sites within a mammalian body. Kits for use in tissue-specific disease imaging are also provided.
    Type: Grant
    Filed: September 26, 2003
    Date of Patent: May 29, 2007
    Assignee: Board of Regents, The University of Texas System
    Inventors: David J. Yang, Chun W. Liu, Dong-Fang Yu, E. Edmund Kim
  • Patent number: 7067111
    Abstract: The invention provides, in a general sense, a new labeling strategy employing 99mTc chelated with ethylenedicysteine (EC). EC is conjugated with a variety of ligands and chelated to 99mTc for use as an imaging agent for tissue-specific diseases. The drug conjugates of the invention may also be used as a prognostic tool or as a tool to deliver therapeutics to specific sites within a mammalian body. Kits for use in tissue-specific disease imaging are also provided.
    Type: Grant
    Filed: June 21, 2000
    Date of Patent: June 27, 2006
    Assignee: Board of Regents, University of Texas System
    Inventors: David J. Yang, Chun W. Liu, Dong-Fang Yu, E. Edmund Kim
  • Patent number: 7060724
    Abstract: Disclosed are water soluble compositions of paclitaxel and docetaxel formed by conjugating the paclitaxel or docetaxel to a water soluble polymer such as poly-glutamic acid, poly-aspartic acid or poly-lysine. Also disclosed are methods of using the compositions for treatment of tumors, auto-immune disorders such as rheumatoid arthritis. Other embodiments include the coating of implantable stents for prevention of restenosis.
    Type: Grant
    Filed: January 30, 2003
    Date of Patent: June 13, 2006
    Assignee: PG-TXL Company, L.P.
    Inventors: Chun Li, Sidney Wallace, Dong-Fang Yu, David J. Yang
  • Patent number: 7008633
    Abstract: Methods regarding local regional treatment in situ for an individual, such as of a tumor, are provided herein. A hydrogel composition is generated in situ in the tumor by administering a polymer, such as a polysaccharide or a polyamino acid, with a therapeutic agent, such as a radionuclide or a drug, and administering a cross-linking agent. The hydrogel/therapeutic agent composition is retained in the tumor for safe and efficient tumor therapy. Alternatively, a hydrogel composition is generated in situ in an artery which nourishes a tumor to occlude the artery.
    Type: Grant
    Filed: December 18, 2001
    Date of Patent: March 7, 2006
    Assignee: Board of Regents, The University of Texas System
    Inventors: David J. Yang, Dong-Fang Yu, Ali Azhdarinia, Tommy L. Lee, E. Edmund Kim
  • Patent number: 6884817
    Abstract: Disclosed are water soluble compositions of paclitaxel and docetaxel formed by conjugating the paclitaxel or docetaxel to a water soluble polymer such as poly-glutamic acid, poly-aspartic acid or poly-lysine. Also disclosed are methods of using the compositions for treatment of tumors, auto-immune disorders such as rheumatoid arthritis. Other embodiments include the coating of implantable stents for prevention of restenosis.
    Type: Grant
    Filed: May 17, 2002
    Date of Patent: April 26, 2005
    Assignee: PG-TXL Company, L.P.
    Inventors: Chun Li, Sidney Wallace, Dong-Fang Yu, David J. Yang
  • Patent number: 6824760
    Abstract: Compounds of formula (I) and (II): wherein groups R1, R2, RE, PG1 and PG2 have the definitions provided in the specification, methods of manufacture and methods of use.
    Type: Grant
    Filed: June 4, 2001
    Date of Patent: November 30, 2004
    Assignee: The University of Texas System
    Inventors: Akira Tanaka, Tomio Inoue, Katsumi Tomiyoshi, David J. Yang, E. Edmund Kim
  • Publication number: 20040166058
    Abstract: The invention provides, in a general sense, a new labeling strategy employing compounds that are are N2S2 chelates conjugated to a targeting ligand, wherein the targeting ligand is a disease cell cycle targeting compound, a tumor angiogenesis targeting ligand, a tumor apoptosis targeting ligand, a disease receptor targeting ligand, amifostine, angiostatin, monoclonal antibody C225, monoclonal antibody CD31, monoclonal antibody CD40, capecitabine, COX-2, deoxycytidine, fullerene, herceptin, human serum albumin, lactose, leuteinizing hormone, pyridoxal, quinazoline, thalidomide, transferrin, or trimethyl lysine. The present invention also pertains to kits employing the compounds of interest, and methods of assessing the pharmacology of an agent of interest using the present compounds.
    Type: Application
    Filed: November 7, 2003
    Publication date: August 26, 2004
    Applicants: Board of Regents, The University of Texas System, Cell>Point LLC
    Inventors: David J. Yang, Dong-Fang Yu, Chang-Sok Oh, Jerry L. Bryant
  • Patent number: 6692724
    Abstract: The invention provides, in a general sense, a new labeling strategy employing 99mTc chelated with ethylenedicysteine (EC). EC is conjugated with a variety of ligands and chelated to 99mTc for use as an imaging agent for tissue-specific diseases. The drug conjugates of the invention may also be used as a prognostic tool or as a tool to deliver therapeutics to specific sites within a mammalian body. Kits for use in tissue-specific disease imaging are also provided.
    Type: Grant
    Filed: October 25, 1999
    Date of Patent: February 17, 2004
    Assignee: Board of Regents, The University of Texas System
    Inventors: David J. Yang, Chun W. Liu, Dong-Fang Yu, E. Edmond Kim