Patents by Inventor Dingguo Liu

Dingguo Liu 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: 20240101717
    Abstract: This application provides novel bispecific antigen-binding antibodies, and antigen-binding fragments thereof, that bind to both HER2 and Trop-2. These bispecific anti-HER2/Trop-2 antibodies comprise a first antigen-binding domain that specifically binds human HER2 or Trop-2, and a second antigen-binding domain that specifically binds human Trop-2 or HER2. The bispecific antibodies have high binding affinity for HER2 and Trop-2, can be internalized by cells expressing HER2 and/or Trop-2. The bispecific antibody-drug conjugates (ADC) are capable of inhibiting the growth of tumors cells expressing HER2 and/or Trop-2 in vitro and in vivo. The bispecific antibodies can be used to diagnose, prognose, and treat HER2- and/or Trop-2-associated human diseases (e.g., cancer, infectious diseases, autoimmune diseases, asthma, transplant rejection, and inflammatory disorders).
    Type: Application
    Filed: January 24, 2022
    Publication date: March 28, 2024
    Inventors: Haifeng BAO, Haihong ZHONG, Wei YUAN, Dingguo LIU
  • Publication number: 20230256114
    Abstract: The present invention describes novel maytansinoid and ansamitosin derivatives and methods for preparing payloads thereof bearing a linker with a functional group for conjugation to cell binding agents to generate cytotoxic drug conjugates. The present invention further relates to antibody drug conjugates conjugated to tumor associated antigen (TAA) antibody, preparation methods, pharmaceutical compositions and uses thereof for the treatment of cancer. The maytansinoid drug linker derivative payloads show increased solubility with decreased aggregation rate compared SMCC-DM1. An antibody drug conjugate containing a maytansinoid drug linker derivative payload and an anti-T rop-2 antibody (e.g., anti-T rop-2-BI-P203) was more or equally potent against Trop-2 high expressing tumors as compared to anti-T rop-2-SMCC-DM 1 or anti-T rop-2-vc-MMAE ADCs, with less effect on low or no antigen expressing cells, suggesting an increased therapeutic window.
    Type: Application
    Filed: July 2, 2021
    Publication date: August 17, 2023
    Inventors: Dingguo LIU, Haifeng BAO, Wei YUAN
  • Publication number: 20230242567
    Abstract: Disclosed are P-stereogenic groups that may be used in the synthesis of compounds including stereochemically enriched P-stereogenic phosphorothioates. P-stereogenic groups may be provided in nucleoside phosphoramidites including a sugar bonded to a nucleobase and to a stereochemically enriched phosphoramidite as well as methods of their use and methods of making them.
    Type: Application
    Filed: January 9, 2023
    Publication date: August 3, 2023
    Inventors: Sukumar SAKAMURI, Curt W. BRADSHAW, Dingguo LIU, Laxman ELTEPU
  • Publication number: 20230235080
    Abstract: This application provides isolated antibodies, and antigen-binding fragments thereof, that specifically bind Trophoblast Cell-Surface Antigen-2 (Trop-2). These Trop-2 antibodies, or antigen-binding fragments thereof, have a highbinding affinity for Trop-2, are capable of inducing antibody- dependent cell-mediated cytotoxicity (ADCC), have good tumor penetration, can be internalized by cells expressing Trop-2, and can be used to diagnose, prognose, and treat Trop-2 -associated human diseases (e.g., cancer, infectious diseases, autoimmune diseases, asthma, transplant rejection, and inflammatory disorders).
    Type: Application
    Filed: June 3, 2021
    Publication date: July 27, 2023
    Inventors: Haifeng BAO, Wei YUAN, Dingguo LIU
  • Patent number: 11597744
    Abstract: Disclosed are chiral phosphoramidite auxiliary compositions for diastereoselective synthesis of stereochemically enriched oligonucleotides, and nucleoside phosphoramidite compounds comprising the same. Exemplary structures of the chiral phosphoramidite auxiliary compositions include Formulas (IA) and (IB).
    Type: Grant
    Filed: July 2, 2018
    Date of Patent: March 7, 2023
    Assignee: SIRIUS THERAPEUTICS, INC.
    Inventors: Sukumar Sakamuri, Curt W. Bradshaw, Dingguo Liu, Laxman Eltepu
  • Publication number: 20220056069
    Abstract: Immunomodulating polynucleotides are disclosed. The immunomodulating polynucleotides may contain 5-modified uridine, 5-modified cytidine, a total of from 6 to 16 nucleotides, and/or one or more abasic spacers and/or internucleoside phosphotriesters. Also disclosed are conjugates containing a targeting moiety and one or more immunomodulating polynucleotides. The immunomodulating polynucleotides and conjugates may further contain one or more auxiliary moieties. Also disclosed are compositions containing the immunomodulating polynucleotides or the conjugates containing one or more stereochemically enriched internucleoside phosphorothioates. Further disclosed are pharmaceutical compositions containing the immunomodulating polynucleotides or the conjugates and methods of their use.
    Type: Application
    Filed: August 30, 2021
    Publication date: February 24, 2022
    Inventors: Sukumar Sakamuri, Curt W. Bradshaw, Son Lam, Joseph Stock, Edward Hyungsuk Ha, Laxman Eltepu, Dingguo Liu, Bin Liu, Giuseppe Dello Iacono, Bryan R. Meade, Ayman Kabakibi
  • Patent number: 11203611
    Abstract: Immunomodulating polynucleotides are disclosed. The immunomodulating polynucleotides may contain 5-modified uridine, 5-modified cytidine, a total of from 6 to 16 nucleotides, and/or one or more abasic spacers and/or internucleoside phosphotriesters. Also disclosed are conjugates containing a targeting moiety and one or more immunomodulating polynucleotides. The immunomodulating polynucleotides and conjugates may further contain one or more auxiliary moieties. Also disclosed are compositions containing the immunomodulating polynucleotides or the conjugates containing one or more stereochemically enriched internucleoside phosphorothioates. Further disclosed are pharmaceutical compositions containing the immunomodulating polynucleotides or the conjugates and methods of their use.
    Type: Grant
    Filed: April 13, 2018
    Date of Patent: December 21, 2021
    Assignee: TOLLNINE, INC.
    Inventors: Sukumar Sakamuri, Curt W. Bradshaw, Son Lam, Joseph Stock, Edward Hyungsuk Ha, Laxman Eltepu, Dingguo Liu, Bin Liu, Giuseppe Dello Iacono, Bryan R. Meade, Ayman Kabakibi
  • Publication number: 20200392498
    Abstract: The invention features a hybridized polynucleotide construct containing a passenger strand, a guide strand loadable into a RISC complex, and (i) a 3?-terminal or an internucleotide non-bioreversible group in the guide strand; or (ii) a 5?-terminal, a 3?-terminal, or an internucleotide non-bioreversible group in the passenger strand, and a 5?-terminal, a 3?-terminal, or an internucleotide disulfide bioreversible group in the guide strand or the passenger strand. The invention also features methods of delivering a polynucleotide to a cell using the hybridized polynucleotide construct. The invention further features methods of reducing the expression of a polypeptide in a cell using the hybridized polynucleotide construct.
    Type: Application
    Filed: February 3, 2020
    Publication date: December 17, 2020
    Inventors: Curt W. BRADSHAW, Sukumar SAKAMURI, Laxman ELTEPU, Son LAM, Dingguo LIU, Bryan MEADE, Giuseppe Dello IACONO, Joseph STOCK, Bin LIU
  • Publication number: 20200140476
    Abstract: Disclosed are P-stereogenic groups that may be used in the synthesis of compounds including stereochemically enriched P-stereogenic phosphorothioates. P-stereogenic groups may be provided in nucleoside phosphoramidites including a sugar bonded to a nucleobase and to a stereochemically enriched phosphoramidite as well as methods of their use and methods of making them.
    Type: Application
    Filed: July 2, 2018
    Publication date: May 7, 2020
    Inventors: Sukumar SAKAMURI, Curt W. BRADSHAW, Dingguo LIU, Laxman ELTEPU
  • Publication number: 20190194655
    Abstract: The invention features a hybridized polynucleotide construct including a passenger strand, a guide strand loadable into a RISC complex, and one or more auxiliary moieties. At least one of the auxiliary moieties is non-bioreversibly linked to an internucleoside phosphate or phosphorothioate in the passenger strand. The invention further features methods of delivery a polynucleotide construct to a cell and methods of reducing the expression of a protein in a cell. The methods typically involve contacting the cell with the hybridized polynucleotide construct.
    Type: Application
    Filed: December 8, 2016
    Publication date: June 27, 2019
    Inventors: Curt W. BRADSHAW, Sukumar SAKAMURI, Bryan R. MEADE, Laxman ELTEPU, Giuseppe Dello IACONO, Son LAM, Joseph STOCK, Dingguo LIU, Bin LIU
  • Publication number: 20180346505
    Abstract: The invention features a mononucleotide comprising a nucleobase bonded to a sugar having a 3?-carbon and a 5?-carbon, where the 5?-carbon is bonded to a phosphorus (V) atom of a phosphate group through an oxygen atom, the phosphorus (V) atom being bonded to (i) a disulfide bioreversible group through an oxygen atom; and (ii) (a) optionally substituted amino, optionally substituted alkoxy, optionally substituted aryloxy, or optionally substituted heteroaryloxy; or (b) the 3?-carbon through an oxygen atom. The invention also features methods of delivering the mononucleotide to a cell and methods of treating a subject having Hepatitis C.
    Type: Application
    Filed: December 10, 2015
    Publication date: December 6, 2018
    Inventors: Curt W. BRADSHAW, Sukumar SAKAMURI, Dingguo LIU
  • Publication number: 20180312536
    Abstract: Immunomodulating polynucleotides are disclosed. The immunomodulating polynucleotides may contain 5-modified uridine, 5-modified cytidine, a total of from 6 to 16 nucleotides, and/or one or more abasic spacers and/or internucleoside phosphotriesters. Also disclosed are conjugates containing a targeting moiety and one or more immunomodulating polynucleotides. The immunomodulating polynucleotides and conjugates may further contain one or more auxiliary moieties. Also disclosed are compositions containing the immunomodulating polynucleotides or the conjugates containing one or more stereochemically enriched internucleoside phosphorothioates. Further disclosed are pharmaceutical compositions containing the immunomodulating polynucleotides or the conjugates and methods of their use.
    Type: Application
    Filed: April 13, 2018
    Publication date: November 1, 2018
    Inventors: Sukumar Sakamuri, Curt W. Bradshaw, Son Lam, Joseph Stock, Edward Hyungsuk Ha, Laxman Eltepu, Dingguo Liu, Bin Liu, Giuseppe Dello Iacono, Bryan R. Meade, Ayman Kabakibi
  • Patent number: 9797627
    Abstract: A district public water supply pipe network system compatible for ground source heat pump water and reclaimed water comprises a water supply main pipe connected with a reclaimed water outlet side of a sewage treatment system and connected to a plurality of energy stations and a plurality of transmission and distribution station, and a return water main pipe arranged between the adjacent energy stations to connect them. The energy stations are provided with a plurality of shallow geothermal heat exchange system for exchanging heat with shallow geothermal energy in the region. Both the energy stations and the transmission and distribution station are connected with corresponding distribution pipe networks connected with a user terminal water supply system. The system provides the source side water and the reclaimed water to users. It is a district public geothermal pipe network and a reclaimed water pipe network.
    Type: Grant
    Filed: November 13, 2014
    Date of Patent: October 24, 2017
    Assignee: TIANJIN GERUISI NEW TECHNOLOGY OF MECHANICAL AND ELECTRICAL CO. LTD.
    Inventor: Dingguo Liu
  • Publication number: 20170114341
    Abstract: The invention features a hybridized polynucleotide construct containing a passenger strand, a guide strand loadable into a RISC complex, and (i) a 3?-terminal or an internucleotide non-bioreversible group in the guide strand; or (ii) a 5?-terminal, a 3?-terminal, or an internucleotide non-bioreversible group in the passenger strand, and a 5?-terminal, a 3?-terminal, or an internucleotide disulfide bioreversible group in the guide strand or the passenger strand. The invention also features methods of delivering a polynucleotide to a cell using the hybridized polynucleotide construct. The invention further features methods of reducing the expression of a polypeptide in a cell using the hybridized polynucleotide construct.
    Type: Application
    Filed: June 8, 2015
    Publication date: April 27, 2017
    Inventors: Curt W. BRADSHAW, Sukumar SAKAMURI, Laxman ELTEPU, Son LAM, Dingguo LIU, Bryan MEADE, Giuseppe Dello IACONO, Joseph STOCK, Bin LIU
  • Publication number: 20160257961
    Abstract: The invention features polynucleotide constructs containing one or more components (i) containing a disulfide linkage, where each of the one or more components is attached to an internucleotide bridging group or a terminal group of the polynucleotide construct, and each of the one or more components (i) contains one or more bulky groups proximal to the disulfide group. The invention also features polynucleotide constructs containing one or more components (i) containing a disulfide linkage, where each of the one or more components (i) is attached to an internucleotide bridging group or a terminal group of the polynucleotide construct, and each of the one or more components (i) contains at least 4 atoms in a chain between the disulfide linkage and the phosphorus atom of the internucleotide bridging group or the terminal group; and where the chain does not contain a phosphate, an amide, an ester, or an alkenylene.
    Type: Application
    Filed: November 6, 2014
    Publication date: September 8, 2016
    Inventors: Curt W. BRADSHAW, Laxman ELTEPU, Ayman KABAKIBI, Son LAM, Bin LIU, Dingguo LIU, Bryan R. MEADE, Sukumar SAKAMURI
  • Publication number: 20150083362
    Abstract: A district public water supply pipe network system compatible for ground source heat pump water and reclaimed water comprises a water supply main pipe connected with a reclaimed water outlet side of a sewage treatment system and connected to a plurality of energy stations and a plurality of transmission and distribution station, and a return water main pipe arranged between the adjacent energy stations to connect them. The energy stations are provided with a plurality of shallow geothermal heat exchange system for exchanging heat with shallow geothermal energy in the region. Both the energy stations and the transmission and distribution station are connected with corresponding distribution pipe networks connected with a user terminal water supply system. The system provides the source side water and the reclaimed water to users. It is a district public geothermal pipe network and a reclaimed water pipe network.
    Type: Application
    Filed: November 13, 2014
    Publication date: March 26, 2015
    Inventor: Dingguo LIU
  • Publication number: 20150057431
    Abstract: The present invention provides methods of treating (including preventing) a disease or condition associated with abnormal angiogenesis in a subject include administering a therapeutically effective amount of an AA targeting compound of the invention to the subject. The AA targeting compounds comprise AA targeting agent-linker conjugates which are linked to a combining site of an antibody.
    Type: Application
    Filed: October 31, 2014
    Publication date: February 26, 2015
    Inventors: Curt William BRADSHAW, Abhijit Suresh BHAT, Jing-Yu LAI, Venkata R. DOPPALAPUDI, Dingguo LIU
  • Patent number: 8937048
    Abstract: The present invention provides various uses of VEGF binding peptides, including methods to treat disorders associated with abnormal angiogenesis. In addition, the invention provides VEGF peptides conjugated to antibodies alone and in conjunction with other anti-angiogenic molecules.
    Type: Grant
    Filed: August 27, 2012
    Date of Patent: January 20, 2015
    Assignee: Covx Technologies Ireland, Limited
    Inventors: Venkata Ramana Doppalapudi, Jing-Yu Lai, Bin Liu, Dingguo Liu, Joel Desharnais, Abhijit Suresh Bhat, Yanwen Fu, Bryan Douglas Oates, Gang Chen, Curt William Bradshaw
  • Patent number: 8912148
    Abstract: The present invention provides methods of treating (including preventing) a disease or condition associated with abnormal angiogenesis in a subject include administering a therapeutically effective amount of an AA targeting compound of the invention to the subject. The AA targeting compounds comprise AA targeting agent-linker conjugates which are linked to a combining site of an antibody.
    Type: Grant
    Filed: August 13, 2012
    Date of Patent: December 16, 2014
    Assignee: Covx Technology Ireland, Ltd.
    Inventors: Curt Bradshaw, Abhijit Bhat, Jing Yu Lai, Venkata Doppalapudi, Dingguo Liu
  • Publication number: 20120321591
    Abstract: The present invention provides various uses of VEGF binding peptides, including methods to treat disorders associated with abnormal angiogenesis.
    Type: Application
    Filed: August 27, 2012
    Publication date: December 20, 2012
    Inventors: Venkata Ramana Doppalapudi, Jing-Yu Lai, Bin Liu, Dingguo Liu, Joel Desharnais, Abhijit Suresh Bhat, Yanwen Fu, Bryan Douglas Oates, Gang Chen, Curt William Bradshaw