Patents by Inventor Nico L.M. Callewaert

Nico L.M. Callewaert 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: 20230071321
    Abstract: The disclosure relates cells or cellular systems that express both a membrane protein and a binding domain directed to the membrane protein. Also, methods are provided that use such cells or cellular systems to produce higher amounts of the membrane proteins. Further, the cells or cellular systems can be used as tools for the structural and functional characterization of membrane proteins, as well as for screening and drug discovery efforts targeting membrane proteins.
    Type: Application
    Filed: October 24, 2022
    Publication date: March 9, 2023
    Inventors: Jan Steyaert, Nico L.M. Callewaert, Toon Laeremans, Els Pardon, Kristof Vandewalle, Katrien Claes
  • Patent number: 11479791
    Abstract: The disclosure relates cells or cellular systems that express both a membrane protein and a binding domain directed to the membrane protein. Also, methods are provided that use such cells or cellular systems to produce higher amounts of the membrane proteins. Further, the cells or cellular systems can be used as tools for the structural and functional characterization of membrane proteins, as well as for screening and drug discovery efforts targeting membrane proteins.
    Type: Grant
    Filed: February 12, 2018
    Date of Patent: October 25, 2022
    Inventors: Jan Steyaert, Nico L. M. Callewaert, Toon Laeremans, Els Pardon, Kristof Vandewalle, Katrien Claes
  • Patent number: 11421209
    Abstract: The present application relates to the field of glyco-engineering, more specifically to glyco-engineering of Fc-containing molecules, such as antibodies. It is shown herein that Fc-containing molecules with a specific glycosylation pattern have a considerably longer circulating half-life in vivo, without having an altered binding affinity for their respective antigen. This has therapeutic implications in reducing the frequency with which these molecules need to be administered, without affecting therapeutic efficacy. Also, cells are provided that can produce the Fc molecules with the desired glycosylation pattern.
    Type: Grant
    Filed: October 5, 2018
    Date of Patent: August 23, 2022
    Assignees: VIB VZW, Universiteit Gent
    Inventors: Nico L. M. Callewaert, Francis Santens
  • Patent number: 11181527
    Abstract: The application discloses methods, kits and a novel biomarker to detect and/or to prognose inflammation in patients. The diagnostic test is based on measuring the ratio of galactosylated and non-galactosylated specific N-glycans as obtained by enzymatic treatment of the total mixture of proteins present in a body fluid such as blood, serum or plasma.
    Type: Grant
    Filed: August 26, 2016
    Date of Patent: November 23, 2021
    Assignees: VIB VZW, Universiteit Gent
    Inventors: Nico L. M. Callewaert, Dieter Vanderschaeghe, Tom Raes
  • Publication number: 20210292796
    Abstract: The present application relates to the field of glyco-engineering, more specifically to glycosylation-engineered fungal cells, more specifically glycosylation-engineered yeast cells, optimized to produce highly homogenous forms of complex N-glycans on recombinant proteins. The invention specifically relates to methods to obtain pharmaceutical compositions comprising recombinant glycoproteins which have homogenous forms of complex N-glycans. In addition, the invention relates to novel pharmaceutical compositions which result from the methods of the invention.
    Type: Application
    Filed: February 26, 2021
    Publication date: September 23, 2021
    Inventors: Nico L.M. Callewaert, Bram Laukens
  • Patent number: 11098337
    Abstract: The disclosure relates to the field of glyco-engineering, more specifically, to eukaryotic cells wherein both an endoglucosaminidase and a glycoprotein are present. These cells can be used to deglycosylate or partly deglycosylate the (exogenous) glycoprotein, in particular, without the need for adding an extra enzyme. Methods are also provided for the application of these cells in protein production. According to one specific aspect, the eukaryotic cells are glyco-engineered yeast cells in which, additionally, at least one exogenous enzyme needed for complex glycosylation is present, e.g., allowing easier separation of differentially glycosylated glycoproteins.
    Type: Grant
    Filed: July 2, 2014
    Date of Patent: August 24, 2021
    Assignees: VIB VZW, Universiteit Gent
    Inventors: Nico L. M. Callewaert, Karen De Pourcq, Steven Geysens, Leander Meuris
  • Patent number: 10941418
    Abstract: The present application relates to the field of glyco-engineering, more specifically to glycosylation-engineered fungal cells, more specifically glycosylation-engineered yeast cells, optimized to produce highly homogenous forms of complex N-glycans on recombinant proteins. The invention specifically relates to methods to obtain pharmaceutical compositions comprising recombinant glycoproteins which have homogenous forms of complex N-glycans. In addition, the invention relates to novel pharmaceutical compositions which result from the methods of the invention.
    Type: Grant
    Filed: May 3, 2017
    Date of Patent: March 9, 2021
    Assignees: VIB VZW, Universiteit Gent
    Inventors: Nico L. M. Callewaert, Bram Laukens
  • Publication number: 20190144889
    Abstract: The present application relates to the field of glyco-engineering, more specifically to glycosylation-engineered fungal cells, more specifically glycosylation-engineered yeast cells, optimized to produce highly homogenous forms of complex N-glycans on recombinant proteins. The invention specifically relates to methods to obtain pharmaceutical compositions comprising recombinant glycoproteins which have homogenous forms of complex N-glycans. In addition, the invention relates to novel pharmaceutical compositions which result from the methods of the invention.
    Type: Application
    Filed: May 3, 2017
    Publication date: May 16, 2019
    Inventors: Nico L.M. Callewaert, Bram Laukens
  • Patent number: 10202590
    Abstract: The present application relates to the field of glyco-engineering, more specifically to glyco-engineering of Fc-containing molecules, such as antibodies. It is shown herein that Fc-containing molecules with a specific glycosylation pattern have a considerably longer circulating half-life in vivo, without having an altered binding affinity for their respective antigen. This has therapeutic implications in reducing the frequency with which these molecules need to be administered, without affecting therapeutic efficacy. Also, cells are provided that can produce the Fc molecules with the desired glycosylation pattern.
    Type: Grant
    Filed: September 5, 2014
    Date of Patent: February 12, 2019
    Assignees: VIB VZW, UNIVERSITEIT GENT
    Inventors: Nico L. M. Callewaert, Francis Santens
  • Publication number: 20190024066
    Abstract: The present application relates to the field of glyco-engineering, more specifically to glyco-engineering of Fc-containing molecules, such as antibodies. It is shown herein that Fc-containing molecules with a specific glycosylation pattern have a considerably longer circulating half-life in vivo, without having an altered binding affinity for their respective antigen. This has therapeutic implications in reducing the frequency with which these molecules need to be administered, without affecting therapeutic efficacy. Also, cells are provided that can produce the Fc molecules with the desired glycosylation pattern.
    Type: Application
    Filed: October 5, 2018
    Publication date: January 24, 2019
    Inventors: Nico L.M. Callewaert, Francis Santens
  • Publication number: 20180238898
    Abstract: The application discloses methods, kits and a novel biomarker to detect and/or to prognose inflammation in patients. The diagnostic test is based on measuring the ratio of galactosylated and non-galactosylated specific N-glycans as obtained by enzymatic treatment of the total mixture of proteins present in a body fluid such as blood, serum or plasma.
    Type: Application
    Filed: August 26, 2016
    Publication date: August 23, 2018
    Inventors: Nico L.M. Callewaert, Dieter Vanderschaeghe, Tom Raes
  • Publication number: 20180237530
    Abstract: The disclosure relates cells or cellular systems that express both a membrane protein and a binding domain directed to the membrane protein. Also, methods are provided that use such cells or cellular systems to produce higher amounts of the membrane proteins. Further, the cells or cellular systems can be used as tools for the structural and functional characterization of membrane proteins, as well as for screening and drug discovery efforts targeting membrane proteins.
    Type: Application
    Filed: February 12, 2018
    Publication date: August 23, 2018
    Inventors: Jan Steyaert, Nico L.M. Callewaert, Toon Laeremans, Els Pardon, Kristof Vandewalle, Katrien Claes
  • Publication number: 20160200825
    Abstract: The present application relates to the field of glyco-engineering, more specifically to glyco-engineering of Fc-containing molecules, such as antibodies. It is shown herein that Fc-containing molecules with a specific glycosylation pattern have a considerably longer circulating half-life in vivo, without having an altered binding affinity for their respective antigen. This has therapeutic implications in reducing the frequency with which these molecules need to be administered, without affecting therapeutic efficacy. Also, cells are provided that can produce the Fc molecules with the desired glycosylation pattern.
    Type: Application
    Filed: September 5, 2014
    Publication date: July 14, 2016
    Inventors: Nico L.M. CALLEWAERT, Francis SANTENS
  • Patent number: 9359628
    Abstract: The present invention provides genetically engineered strains of Pichia capable of producing proteins with reduced glycosylation. In particular, the genetically engineered strains of the present invention are capable of expressing either or both of an ?-1,2-mannosidase and glucosidase II. The genetically engineered strains of the present invention can be further modified such that the OCH1 gene is disrupted. Methods of producing glycoproteins with reduced glycosylation using such genetically engineered stains of Pichia are also provided.
    Type: Grant
    Filed: January 10, 2014
    Date of Patent: June 7, 2016
    Assignees: VIB, VZW, Research Corporation Technologies, Inc., Universiteit Gent
    Inventors: Roland Contreras, Nico L.M. Callewaert, Steven C.J. Geysens
  • Publication number: 20140345004
    Abstract: The disclosure relates to the field of glyco-engineering, more specifically, to eukaryotic cells wherein both an endoglucosaminidase and a glycoprotein are present. These cells can be used to deglycosylate or partly deglycosylate the (exogenous) glycoprotein, in particular, without the need for adding an extra enzyme. Methods are also provided for the application of these cells in protein production. According to one specific aspect, the eukaryotic cells are glyco-engineered yeast cells in which, additionally, at least one exogenous enzyme needed for complex glycosylation is present, e.g., allowing easier separation of differentially glycosylated glycoproteins.
    Type: Application
    Filed: July 2, 2014
    Publication date: November 20, 2014
    Inventors: Nico L.M. CALLEWAERT, Karen DE POURCQ, Steven GUYSENS, Leander MEURIS
  • Patent number: 8883445
    Abstract: The present invention provides genetically engineered strains of methylotrophic yeast including Pichia and especially Pichia pastoris capable of producing proteins with reduced or modified glycosylation. Methods of producing glycoproteins with reduced and/or modified glycosylation using such genetically engineered strains of Pichia are also provided. Vectors, which comprise coding sequences for ?-1,2-mannosidase I, glucosidase II, GlcNAc-tranferase I and mannosidase II or comprising OCH1 disrupting sequence, for transforming methylotrophic yeasts are contemplated by the present invention. Kit for providing the comtemplated vectors are also included in this invention.
    Type: Grant
    Filed: July 13, 2007
    Date of Patent: November 11, 2014
    Assignees: Research Corporation Technologies, Inc., Universiteit Gent, Vib, VZW
    Inventors: Roland Contreras, Nico L. M. Callewaert, Steven C. J. Geysens, Vladimir Kaigorodov, Vervecken Wouter
  • Patent number: 8815580
    Abstract: The present application relates to the field of glyco-engineering, more specifically to eukaryotic cells wherein both an endoglucosaminidase and a glycoprotein are present. These cells can be used to deglycosylate or partly deglycosylate the (exogenous) glycoprotein, in particular without the need for adding an extra enzyme. Methods are also provided for the application of these cells in protein production. According to one specific aspect, the eukaryotic cells and methods are glyco-engineered yeast cells in which additionally at least one exogenous enzyme needed for complex glycosylation is present, e.g. allowing easier separation of differentially glycosylated glycoproteins.
    Type: Grant
    Filed: August 10, 2009
    Date of Patent: August 26, 2014
    Assignees: VIB VZW, Universiteit Gent
    Inventors: Nico L. M. Callewaert, Karen De Pourcq, Steven Geysens, Leander Meuris
  • Publication number: 20140154738
    Abstract: The present invention provides genetically engineered strains of Pichia capable of producing proteins with reduced glycosylation. In particular, the genetically engineered strains of the present invention are capable of expressing either or both of an ?-1,2-mannosidase and glucosidase II. The genetically engineered strains of the present invention can be further modified such that the OCH1 gene is disrupted. Methods of producing glycoproteins with reduced glycosylation using such genetically engineered stains of Pichia are also provided.
    Type: Application
    Filed: January 10, 2014
    Publication date: June 5, 2014
    Applicants: VIB, VZW, UNIVERSITEIT GENT, RESEARCH CORPORATION TECHNOLOGIES, INC.
    Inventors: Roland Contreras, Nico L.M. Callewaert, Steven C.J. Geysens
  • Patent number: 8663971
    Abstract: The present invention provides genetically engineered strains of Pichia capable of producing proteins with reduced glycosylation. In particular, the genetically engineered strains of the present invention are capable of expressing either or both of an ?-1,2-mannosidase and glucosidase II. The genetically engineered strains of the present invention can be further modified such that the OCH1 gene is disrupted. Methods of producing glycoproteins with reduced glycosylation using such genetically engineered stains of Pichia are also provided.
    Type: Grant
    Filed: April 16, 2009
    Date of Patent: March 4, 2014
    Assignees: VIB, VZW, Research Corporation Technologies, Inc., Universiteit Gent
    Inventors: Roland Contreras, Nico L. M. Callewaert, Steven C. J. Geysens
  • Publication number: 20130137140
    Abstract: The present application relates to the field of protein expression technologies. More specifically, it is demonstrated that cells with increased levels of phosphatidic acid, which can be achieved through either or both of phosphatidic acid inhibition and diacylglycerol kinase overexpression, display increased membrane formation from which increased levels of proteins can be recovered.
    Type: Application
    Filed: June 15, 2011
    Publication date: May 30, 2013
    Applicants: UNIVERSITEIT GENT, VIB VZW
    Inventors: Nico L.M. Callewaert, Mouna Guerfal