Patents by Inventor Bart KLEIN

Bart KLEIN 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: 20260347845
    Abstract: The disclosure relates to the field of cardiovascular diseases, such as atherosclerotic cardiovascular diseases (ASCVD) caused by (high) levels of LDL-C and/or triglycerides in the plasma. The disclosure involves oligonucleotides and the use thereof in RNA editing methods in targeting a target adenosine in an endogenous (preferably wildtype) human ANGPTL3 transcript in a cell, preferably a liver cell, more preferably a hepatocyte, to yield an ANGPTL3 protein that has a diminished or lowered ability to inhibit lipolysis, because of the RNA editing.
    Type: Application
    Filed: February 19, 2024
    Publication date: November 5, 2026
    Applicant: ProQR Therapeutics II B.V.
    Inventors: Maarten HOLKERS, Aliye Seda YILMAZ-ELIS, Gerardus Johannes PLATENBURG, Bart KLEIN, Bruno Filipe Madeira DE ALBUQUERQUE, Angela HELFRICHT
  • Publication number: 20260275356
    Abstract: The present invention relates to antisense oligonucleotides (AONs) that can mediate RNA editing by binding to a target RNA nucleic acid molecule, preferably an RNA transcript molecule, in a cell and recruiting an endogenous deaminating enzyme in the cell to deaminate one or more target adenosine nucleotides in the target RNA molecule to an inosine. The target RNA molecule is a transcript molecule form the SLC10A1 gene that encodes the Na/Taurocholate Co-transporting Polypeptide (NTCP). The RNA editing of the one or more target adenosines will result in a loss-of-function of the NTCP protein, which will result in lowered uptake of bile acids from the portal circulation into the liver, thereby lowering the risk of suffering from disorders related to bile accumulation in the liver.
    Type: Application
    Filed: March 26, 2024
    Publication date: September 17, 2026
    Applicant: ProQR Therapeutics II B.V.
    Inventors: Maarten HOLKERS, Bart KLEIN, Christopher Kuyler DOYLE, Bruno Filipe Madeira DE ALBUQUERQUE, Marko POTMAN
  • Publication number: 20260207775
    Abstract: The invention relates to the field of diseases caused by high levels of LDL-C and/or fibrinogen, such as cardiovascular disease. The invention involves oligonucleotides for RNA editing technology in deaminating target adenosine nucleotides, such as the adenosine at position 1055, in transcripts of the human B4GALT1 gene.
    Type: Application
    Filed: December 8, 2023
    Publication date: July 23, 2026
    Applicant: ProQR Therapeutics II B.V.
    Inventors: Marko POTMAN, Aliye Seda YILMAZ-ELIS, Bart KLEIN, Petra Geziena DE BRUIJN, Bruno Filipe Madeira DE ALBUQUERQUE, Angela HELFRICHT, Peter Christian DE VISSER
  • Patent number: 12655423
    Abstract: RNA editing is achieved using oligonucleotide constructs comprising (i) a targeting portion specific for a target nucleic acid sequence to be edited and (ii) a recruiting portion capable of binding and recruiting a nucleic acid editing entity naturally present in the cell. The nucleic acid editing entity, such as ADAR, is redirected to a preselected target site by means of the targeting portion, thereby promoting editing of preselected nucleotide residues in a region of the target RNA which corresponds to the targeting portion.
    Type: Grant
    Filed: June 8, 2023
    Date of Patent: June 16, 2026
    Assignee: ProQR Therapeutics II B.V.
    Inventors: Bart Klein, Gerardus Johannes Platenburg
  • Patent number: 12545911
    Abstract: The invention relates to antisense oligonucleotides that are capable of bringing about specific editing of a target nucleotide (adenosine) in a target RNA in a eukaryotic cell, wherein said oligonucleotide does not, in itself, form an intramolecular hair-pin or stem-loop structure, and wherein said oligonucleotide comprises a cytidine (a non-complementary nucleotide) or a uridine in a position opposite to the target adenosine to be edited in the target RNA region.
    Type: Grant
    Filed: May 3, 2024
    Date of Patent: February 10, 2026
    Assignee: ProQR Therapeutics II B.V.
    Inventors: Janne Juha Turunen, Petra Geziena De Bruijn, Bart Klein, Roxana Simona Redis, Lenka Van Sint Fiet
  • Publication number: 20250223593
    Abstract: The invention relates to antisense oligonucleotides that are capable of bringing about specific editing of a target nucleotide (adenosine) in a target RNA sequence in a cukaryotic cell, wherein said oligonucleotide does not, in itself, form an intramolceular hairpin or stem-loop structure, and wherein said oligonucleotide comprises a non-complementary nucleotide in a position opposite to the nucleotide to be edited in the target RNA sequence.
    Type: Application
    Filed: December 12, 2024
    Publication date: July 10, 2025
    Applicant: ProQR Therapeutics II B.V.
    Inventors: Janne Juha TURUNEN, Antti AALTO, Bart KLEIN, Lenka VAN SINT FIET, Julien Auguste Germain BOUDET
  • Publication number: 20250154504
    Abstract: The invention relates to guide oligonucleotides that can bring about specific changes to a target RNA or DNA molecule in a eukaryotic cell, preferably liver cells, for use in the treatment of hypercholesterolemia, cardiovascular disease, liver injury and/or alcohol-induced steatohepatitis in human subjects. More specifically, the invention relates to guide oligonucleotides and the use thereof in the editing of nucleic acids encoding an auto-cleavage site within the PCSK9 proprotein, thereby inhibiting, or inactivating the PCSK9 protein (or the matured PCSK9 complex) in its ability to cause LDL receptor protein degradation.
    Type: Application
    Filed: February 13, 2023
    Publication date: May 15, 2025
    Applicant: ProQR Therapeutics II B.V.
    Inventors: Gerardus Johannes PLATENBURG, Bart KLEIN, Lenka VAN SINT FIET, Maarten HOLKERS
  • Patent number: 12203072
    Abstract: The invention relates to antisense oligonucleotides that are capable of bringing about specific editing of a target nucleotide (adenosine) in a target RNA sequence in a eukaryotic cell, wherein said oligonucleotide does not, in itself, form an intramolecular hairpin or stem-loop structure, and wherein said oligonucleotide comprises a non-complementary nucleotide in a position opposite to the nucleotide to be edited in the target RNA sequence.
    Type: Grant
    Filed: March 17, 2023
    Date of Patent: January 21, 2025
    Assignee: ProQR Therapeutics II B.V.
    Inventors: Janne Juha Turunen, Antti Aalto, Bart Klein, Lenka Van Sint Fiet, Julien Auguste Germain Boudet
  • Publication number: 20240417721
    Abstract: The invention relates to antisense oligonucleotides that are capable of bringing about specific editing of a target nucleotide (adenosine) in a target RNA in a eukaryotic cell, wherein said oligonucleotide does not, in itself, form an intramolecular hair-pin or stem-loop structure, and wherein said oligonucleotide comprises a cytidine (a non-complementary nucleotide) or a uridine in a position opposite to the target adenosine to be edited in the target RNA region.
    Type: Application
    Filed: May 3, 2024
    Publication date: December 19, 2024
    Applicant: ProQR Therapeutics II B.V.
    Inventors: Janne Juha TURUNEN, Petra Geziena DE BRUIJN, Bart KLEIN, Roxana Simona REDIS, Lenka VAN SINT FIET
  • Publication number: 20240271131
    Abstract: The invention relates to antisense oligonucleotides that are capable of bringing about specific editing of a target nucleotide (adenosine) in a target RNA sequence in a eukaryotic cell, wherein said oligonucleotide does not, in itself, form an intramolecular hairpin or stem-loop structure, and wherein said oligonucleotide comprises a non-complementary nucleotide in a position opposite to the nucleotide to be edited in the target RNA sequence.
    Type: Application
    Filed: March 17, 2023
    Publication date: August 15, 2024
    Applicant: ProQR Therapeutics II B.V.
    Inventors: Janne Juha TURUNEN, Antti AALTO, Bart KLEIN, Lenka VAN SINT FIET, Julien Auguste Germain BOUDET
  • Publication number: 20240229030
    Abstract: The invention relates to nucleic acid molecules for pseudouridylation of a target uridine in a target RNA in a mammalian cell, wherein the nucleic acid molecule comprises a guide region capable of forming a partially double stranded nucleic acid complex with the target RNA comprising the target uridine, wherein the partially double stranded nucleic acid complex is capable of engaging a mammalian pseudouridylation enzyme, wherein the guide region assists in positioning the target uridine in the partially double stranded nucleic acid complex for it to be converted to a pseudouridine by the mammalian pseudouridylation enzyme.
    Type: Application
    Filed: September 28, 2023
    Publication date: July 11, 2024
    Applicants: University of Rochester, ProQR Therapeutics II B.V.
    Inventors: Bart KLEIN, Janne Juha TURUNEN, Lenka VAN SINT FIET, Pedro Duarte Morais Fernandes Arantes DA SILVA, Julien Auguste Germain BOUDET, Yi-Tao YU, Hironori ADACHI, Meemanage De ZOYSA
  • Patent number: 12018257
    Abstract: The invention relates to antisense oligonucleotides that are capable of bringing about specific editing of a target nucleotide (adenosine) in a target RNA in a eukaryotic cell, wherein said oligonucleotide does not, in itself, form an intramolecular hairpin or stem-loop structure, and wherein said oligonucleotide comprises a cytidine (a non-complementary nucleotide) or a uridine in a position opposite to the target adenosine to be edited in the target RNA region.
    Type: Grant
    Filed: April 6, 2023
    Date of Patent: June 25, 2024
    Assignee: ProQR Therapeutics II B.V.
    Inventors: Janne Juha Turunen, Petra Geziena De Bruijn, Bart Klein, Roxana Simona Redis, Lenka Van Sint Fiet
  • Publication number: 20240141336
    Abstract: RNA editing is achieved using oligonucleotide constructs comprising (i) a targeting portion specific for a target nucleic acid sequence to be edited and (ii) a recruiting portion capable of binding and recruiting a nucleic acid editing entity naturally present in the cell. The nucleic acid editing entity, such as ADAR, is redirected to a preselected target site by means of the targeting portion, thereby promoting editing of preselected nucleotide residues in a region of the target RNA which corresponds to the targeting portion.
    Type: Application
    Filed: June 8, 2023
    Publication date: May 2, 2024
    Applicant: ProQR Therapeutics II B.V.
    Inventors: Bart KLEIN, Gerardus Johannes PLATENBURG
  • Publication number: 20240132890
    Abstract: The invention relates to nucleic acid molecules for pseudouridylation of a target uridine in a target RNA in a mammalian cell, wherein the nucleic acid molecule comprises a guide region capable of forming a partially double stranded nucleic acid complex with the target RNA comprising the target uridine, wherein the partially double stranded nucleic acid complex is capable of engaging a mammalian pseudouridylation enzyme, wherein the guide region assists in positioning the target uridine in the partially double stranded nucleic acid complex for it to be converted to a pseudouridine by the mammalian pseudouridylation enzyme.
    Type: Application
    Filed: September 27, 2023
    Publication date: April 25, 2024
    Applicants: University of Rochester, ProQR Therapeutics II B.V.
    Inventors: Bart KLEIN, Janne Juha TURUNEN, Lenka VAN SINT FIET, Pedro Duarte Morais Fernandes Arantes DA SILVA, Julien Auguste Germain BOUDET, Yi-Tao YU, Hironori ADACHI, Meemanage De ZOYSA
  • Patent number: 11866702
    Abstract: The invention relates to nucleic acid molecules for pseudouridylation of a target uridine in a target RNA in a mammalian cell, wherein the nucleic acid molecule comprises a guide region capable of forming a partially double stranded nucleic acid complex with the target RNA comprising the target uridine, wherein the partially double stranded nucleic acid complex is capable of engaging a mammalian pseudouridylation enzyme, wherein the guide region assists in positioning the target uridine in the partially double stranded nucleic acid complex for it to be converted to a pseudouridine by the mammalian pseudouridylation enzyme.
    Type: Grant
    Filed: March 27, 2019
    Date of Patent: January 9, 2024
    Assignees: University of Rochester, ProQR Therapeutics II B.V.
    Inventors: Bart Klein, Janne Juha Turunen, Lenka Van Sint Fiet, Pedro Duarte Morais Fernandes Arantes Da Silva, Julien Auguste Germain Boudet, Yi-Tao Yu, Hironori Adachi, Meemanage De Zoysa
  • Patent number: 11851656
    Abstract: The invention relates to antisense oligonucleotides that are capable of bringing about specific editing of a target nucleotide (adenosine) in a target RNA sequence in a eukaryotic cell, wherein said oligonucleotide does not, in itself, form an intramolecular hairpin or stem-loop structure, and wherein said oligonucleotide comprises a non-complementary nucleotide in a position opposite to the nucleotide to be edited in the target RNA sequence.
    Type: Grant
    Filed: January 20, 2021
    Date of Patent: December 26, 2023
    Assignee: ProQR Therapeutics II B.V.
    Inventors: Janne Juha Turunen, Antti Aalto, Bart Klein, Lenka Van Sint Fiet, Julien Auguste Germain Boudet
  • Patent number: 11781134
    Abstract: RNA editing is achieved using oligonucleotide constructs comprising (i) a targeting portion specific for a target nucleic acid sequence to be edited and (ii) a recruiting portion capable of binding and recruiting a nucleic acid editing entity naturally present in the cell. The nucleic acid editing entity, such as ADAR, is redirected to a preselected target site by means of the targeting portion, thereby promoting editing of preselected nucleotide residues in a region of the target RNA which corresponds to the targeting portion.
    Type: Grant
    Filed: March 3, 2020
    Date of Patent: October 10, 2023
    Assignee: ProQR Therapeutics II B.V.
    Inventors: Bart Klein, Gerardus Johannes Platenburg
  • Publication number: 20230279392
    Abstract: The invention relates to antisense oligonucleotide that are capable of bringing about specific editing of a target nucleotide (adenosine) in a target RNA in a eukaryotic cell, wherein said oligonucleotide does not, in itself, form an intramolecular hairpin or stem-loop structure, and wherein said oligonucleotide comprises a cytidine (a non-complementary nucleotide) or a uridine in a position opposite to the target adenosine to be edited in the target RNA region.
    Type: Application
    Filed: April 6, 2023
    Publication date: September 7, 2023
    Applicant: ProQR Therapeutics II B.V.
    Inventors: Janne Juha TURUNEN, Petra Geziena DE BRUIJN, Bart KLEIN, Roxana Simona REDIS, Lenka VAN SINT FIET
  • Patent number: 11649454
    Abstract: The invention relates to antisense oligonucleotides that are capable of bringing about specific editing of a target nucleotide (adenosine) in a target RNA in a eukaryotic cell, wherein said oligonucleotide does not, in itself, form an intramolecular hairpin or stem-loop structure, and wherein said oligonucleotide comprises a cytidine (a non-complementary nucleotide) or a uridine in a position opposite to the target adenosine to be edited in the target RNA region.
    Type: Grant
    Filed: March 26, 2021
    Date of Patent: May 16, 2023
    Assignee: ProQR Therapeutics II B.V.
    Inventors: Janne Juha Turunen, Petra Geziena De Bruijn, Bart Klein, Roxana Simona Redis, Lenka Van Sint Fiet
  • Publication number: 20220340900
    Abstract: The invention relates to single-stranded RNA editing antisense oligonucleotides (AONs) for binding to a target RNA molecule for deaminating a target nucleotide, preferably an adenosine, present in the target RNA molecule and recruiting, in a cell, preferably a human cell, an enzyme with nucleotide deamination activity, preferably an ADAR enzyme, to deaminate the target nucleotide in the target RNA molecule. The AONs carry at least one methylphosphonate-modified internucleosidic linkage on a position that would render the AON more stable in comparison to an AON not carrying that methylphosphonate modification at that position.
    Type: Application
    Filed: April 2, 2020
    Publication date: October 27, 2022
    Inventors: Janne Juha Turunen, Bart Klein, Lenka Van Sint Fiet, Antti Aalto, Cherie Paige Kemmel, Tess Hoogeboom, Lisanne Alieda Van Wissen