Patents Assigned to Wista Laboratories Ltd.
  • Patent number: 12324810
    Abstract: Described are methods of preparing reduced 3,7-diamino-10H-phenothiazine (DAPTZ) compounds of formula: wherein: R1 and R9 are independently selected from: —H; C1-4alkyl; C2-4 alkenyl; and halogenated C1-4 alkyl; each of R3NA and R3NB is independently selected from: —H; C1-4 alkyl; C2-4 alkenyl; and halogenated C1-4 alkyl; each of R7NA and R7NB is independently selected from: —H; C1-4 alkyl; C2-4 alkenyl; and halogenated C1-4 alkyl; each of HX1 and HX2 is independently a protic acid; and pharmaceutically acceptable salts, solvates, and hydrates thereof. These methods are particularly useful for producing stable reduced forms, and with high purity. The stability and purity are especially relevant for pharmaceutical compositions for the treatment of disease. The compounds are useful for treatment of e.g. tauopathies, such as Alzheimer's disease, and also as prodrugs for the corresponding oxidized thioninium drugs.
    Type: Grant
    Filed: March 5, 2024
    Date of Patent: June 10, 2025
    Assignee: WisTa Laboratories Ltd.
    Inventors: Claude Michel Wischik, Janet Elizabeth Rickard, Charles Robert Harrington, David Horsley, John Mervyn David Storey, Colin Marshall, James Peter Sinclair, Thomas Craven Baddeley
  • Patent number: 12310973
    Abstract: The invention provides novel regimens for treatment of neurodegenerative disorders utilising methylthioninium (MT)-containing compounds. The regimens are based on novel findings in relation to the dosage of MT compounds, and their interaction with symptomatic treatments based on modulation of a acetylcholinesterase levels.
    Type: Grant
    Filed: April 6, 2023
    Date of Patent: May 27, 2025
    Assignee: WisTa Laboratories Ltd.
    Inventors: Claude Michel Wischik, Björn Olaf Schelter, Damon Jude Wischik, John Mervyn David Storey
  • Patent number: 12280061
    Abstract: The invention provides novel dosing regimens for Leuco-Methylthioninium (LMT) compounds which maximise the proportion of subjects in which the MT concentration will exceed concentrations in which therapeutic efficacy in relation to treatment of neurodegenerative disorders such as Alzheimer's disease and rontotemporal dementias can be achieved, while maintaining a desirable clinical profile. Also provided are LMT-containing dosage units and other compositions.
    Type: Grant
    Filed: July 18, 2019
    Date of Patent: April 22, 2025
    Assignee: WisTa Laboratories Ltd.
    Inventors: Claude Michel Wischik, Björn Olaf Schelter, Helen Christine Shiells
  • Patent number: 12263175
    Abstract: The invention provides novel dosing regimens for Leuco-Methylthioninium (LMT) compounds which maximise the proportion of subjects in which the MT concentration will exceed concentrations in which therapeutic efficacy in relation to treatment of neurodegenerative disorders such as Alzheimer's disease and rontotemporal dementias can be achieved, while maintaining a desirable clinical profile. Also provided are LMT-containing dosage units and other compositions.
    Type: Grant
    Filed: October 7, 2022
    Date of Patent: April 1, 2025
    Assignee: WisTa Laboratories Ltd.
    Inventors: Claude Michel Wischik, Bjorn Olaf Schelter, Helen Christine Shiells
  • Publication number: 20250069757
    Abstract: A method for predicting a patient or patient cohort's cognition score on the Alzheimer's Disease Assessment Scale-cognitive subscale (ADAS-Cog). The method comprises obtaining data relating to a plurality of patients or patient cohorts, the data including information relating to the longitudinal trajectories of the plurality of patients', or patient cohorts', ADAS-Cog score over time, each patient or patient cohort having undergone a treatment plan selected from a plurality of treatment plans; encoding the data into a tensor across patients or patient cohorts, time and treatment plan; generating a synthetic model of a target patient or target patient cohort using a machine learning process and the tensor; and predicting an ADAS-Cog score of the target patient or target patient cohort under a target treatment plan selected from the plurality of treatment plans, using the synthetic model.
    Type: Application
    Filed: December 13, 2022
    Publication date: February 27, 2025
    Applicant: WisTa Laboratories Ltd.
    Inventors: Anish Agarwal, Vishal Misra, Bjoern Schelter, Devavrat Shah, Dennis Shen, Helen Shiells, Claude Michel Wischik
  • Publication number: 20250000871
    Abstract: Disclosed are compounds of general formula (I): and pharmaceutically acceptable salts thereof, formulations, methods and uses in, for example, the treatment of disease.
    Type: Application
    Filed: July 1, 2024
    Publication date: January 2, 2025
    Applicant: WisTa Laboratories Ltd.
    Inventors: Colin Marshall, Scott Clunas, John Mervyn David Storey, James Peter Sinclair, Thomas Craven Baddeley, Ahtsham Ishaq, Michael Simpson, Craig Williamson, Barry Alan Wood, Claude Michel Wischik, Charles Robert Harrington, Janet Elizabeth Rickard, David Horsley, Yin Sze Loh, Karrar Ahmad Khan, Christopher Paul Larch
  • Patent number: 12128051
    Abstract: The invention provides novel regimens for treatment of neurodegenerative disorders utilising methylthioninium (MT)-containing compounds. The regimens are based on novel findings in relation to the dosage of MT compounds, and their interaction with symptomatic treatments based on modulation of acetylcholinesterase levels.
    Type: Grant
    Filed: October 7, 2022
    Date of Patent: October 29, 2024
    Assignee: WisTa Laboratories Ltd.
    Inventors: Claude Michel Wischik, Bjorn Olaf Schelter, Damon Jude Wischik, John Mervyn David Storey
  • Patent number: 12064439
    Abstract: Disclosed are compounds of general formula (I): and pharmaceutically acceptable salts thereof, formulations, methods and uses in, for example, the treatment of disease.
    Type: Grant
    Filed: October 12, 2021
    Date of Patent: August 20, 2024
    Assignee: WisTa Laboratories Ltd.
    Inventors: Colin Marshall, Scott Clunas, John Mervyn David Storey, James Peter Sinclair, Thomas Craven Baddeley, Ahtsham Ishaq, Michael Simpson, Craig Williamson, Barry Alan Wood, Claude Michel Wischik, Charles Robert Harrington, Janet Elizabeth Rickard, David Horsley, Yin Sze Loh, Karrar Ahmad Khan, Christopher Paul Larch
  • Publication number: 20240245700
    Abstract: Described are methods of preparing reduced 3,7-diamino-10H-phenothiazine (DAPTZ) compounds of formula: wherein: R1 and R9 are independently selected from: —H; C1-4alkyl; C2-4 alkenyl; and halogenated C1-4 alkyl; each of R3NA and R3NB is independently selected from: —H; C1-4 alkyl; C2-4 alkenyl; and halogenated C1-4 alkyl; each of R7NA and R7NB is independently selected from: —H; C1-4 alkyl; C2-4 alkenyl; and halogenated C1-4 alkyl; each of HX1 and HX2 is independently a protic acid; and pharmaceutically acceptable salts, solvates, and hydrates thereof. These methods are particularly useful for producing stable reduced forms, and with high purity. The stability and purity are especially relevant for pharmaceutical compositions for the treatment of disease. The compounds are useful for treatment of e.g. tauopathies, such as Alzheimer's disease, and also as prodrugs for the corresponding oxidized thioninium drugs.
    Type: Application
    Filed: March 5, 2024
    Publication date: July 25, 2024
    Applicant: WisTa Laboratories Ltd.
    Inventors: Claude Michel Wischik, Janet Elizabeth Rickard, Charles Rober Harrington, David Horsley, John Mervyn David Storey, Colin Marshall, James Peter Sinclair, Thomas Craven Baddeley
  • Publication number: 20240115580
    Abstract: Disclosed are methods of synthesis and/or purification of certain 3,7-diamino-phenothiazin-5-ium compounds (“diaminophenothiazinium compounds”) including Methylthioninium Chloride (MTC) (Methylene Blue), and the resulting high purity characterized by a purity greater than 98%, and very low levels of heavy metals and organic impurities Azure A, B, C and MVB. Also disclosed are methods of treatment of a tauopathy or methemoglobinemia in a patient in need thereof, comprising administering to the patient a therapeutically effective amount of the high-purity diaminophenothiazinium compound.
    Type: Application
    Filed: December 8, 2023
    Publication date: April 11, 2024
    Applicant: WisTa Laboratories Ltd.
    Inventors: Claude Michel Wischik, John Mervyn David Storey, Colin Marshall, James Peter Sinclair, Thomas Craven Baddeley
  • Patent number: 11951110
    Abstract: Described are methods of preparing reduced 3,7-diamino-10H-phenothiazine (DAPTZ) compounds of formula: wherein: R1 and R9 are independently selected from: —H; C1-4alkyl; C2-4alkenyl; and halogenated C1-4alkyl; each of R3NA and R3NB is independently selected from: —H; C1-4alkyl; C2-4alkenyl; and halogenated C1-4alkyl; each of R7NA and R7NB is independently selected from: —H; C1-4alkyl; C2-4alkenyl; and halogenated C1-4alkyl; each of HX1 and HX2 is independently a protic acid; and pharmaceutically acceptable salts, solvates, and hydrates thereof. These methods are particularly useful for producing stable reduced forms, and with high purity. The stability and purity are especially relevant for pharmaceutical compositions for the treatment of disease. The compounds are useful for treatment of e.g. tauopathies, such as Alzheimer's disease, and also as prodrugs for the corresponding oxidized thioninium drugs.
    Type: Grant
    Filed: February 2, 2022
    Date of Patent: April 9, 2024
    Assignee: WisTa Laboratories Ltd.
    Inventors: Claude Michel Wischik, Janet Elizabeth Rickard, Charles Robert Harrington, David Horsley, John Mervyn David Storey, Colin Marshall, James Peter Sinclair, Thomas Craven Baddeley
  • Patent number: 11878021
    Abstract: Disclosed are methods of synthesis and/or purification of certain 3,7-diamino-phenothiazin-5-ium compounds (“diaminophenothiazinium compounds”) including Methylthioninium Chloride (MTC) (Methylene Blue), and the resulting high purity characterized by a purity greater than 98%, and very low levels of heavy metals and organic impurities Azure A, B, C and MVB. Also disclosed are methods of treatment of a tauopathy or methemoglobinemia in a patient in need thereof, comprising administering to the patient a therapeutically effective amount of the high-purity diaminophenothiazinium compound.
    Type: Grant
    Filed: June 23, 2021
    Date of Patent: January 23, 2024
    Assignee: WisTa Laboratories Ltd.
    Inventors: Claude Michel Wischik, John Mervyn David Storey, Colin Marshall, James Peter Sinclair, Thomas Craven Baddeley
  • Publication number: 20230346794
    Abstract: The invention provides novel regimens for treatment of neurodegenerative disorders utilising methylthioninium (MT)-containing compounds. The regimens are based on novel findings in relation to the dosage of MT compounds, and their interaction with symptomatic treatments based on modulation of a acetylcholinesterase levels.
    Type: Application
    Filed: April 6, 2023
    Publication date: November 2, 2023
    Applicant: WisTa Laboratories Ltd.
    Inventors: Claude Michel Wischik, Bjorn Olaf Schelter, Damon Jude Wischik, John Mervyn David Storey
  • Patent number: 11759469
    Abstract: The invention provides novel regimens for treatment of neurodegenerative disorders utilising methylthioninium (MT)-containing compounds. The regimens are based on novel findings in relation to the dosage of MT compounds, and their interaction with symptomatic treatments based on modulation of acetylcholinesterase levels.
    Type: Grant
    Filed: June 16, 2021
    Date of Patent: September 19, 2023
    Assignee: WisTa Laboratories Ltd.
    Inventors: Claude Michel Wischik, Bjorn Olaf Schelter, Damon Jude Wischik, John Mervyn David Storey
  • Publication number: 20230165876
    Abstract: T he present invention provides methods of treating COV-ID-19 in a subject using methylthioninium compounds.
    Type: Application
    Filed: April 30, 2021
    Publication date: June 1, 2023
    Applicant: WisTa Laboratories Ltd.
    Inventors: Claude Michel Wischik, Mohammad Arastoo, Michael Philip Mazanetz
  • Publication number: 20230165877
    Abstract: The invention provides novel regimens for treatment of neurodegenerative disorders utilising methylthioninium (MT)-containing compounds. The regimens are based on novel findings in relation to the dosage of MT compounds, and their interaction with symptomatic treatments based on modulation of acetylcholinesterase levels.
    Type: Application
    Filed: October 7, 2022
    Publication date: June 1, 2023
    Applicant: WisTa Laboratories Ltd.
    Inventors: Claude Michel Wischik, Bjorn Olaf Schelter, Damon Jude Wischik, John Mervyn David Storey
  • Publication number: 20230165875
    Abstract: The present invention provides methods of treating COVID-19 in a subject using methylthioninium compounds.
    Type: Application
    Filed: April 30, 2021
    Publication date: June 1, 2023
    Applicant: WisTa Laboratories Ltd.
    Inventors: Claude Michel Wischik, Mohammad Arastoo, Michael Philip Mazanetz
  • Publication number: 20230158040
    Abstract: The present invention provides methods of alleviating hypoxemia in a subject through oral administration of a methylthioninium compound.
    Type: Application
    Filed: April 30, 2021
    Publication date: May 25, 2023
    Applicant: WisTa Laboratories Ltd.
    Inventors: Claude Michel Wischik, Mohammad Arastoo, Michael Philip Mazanetz
  • Publication number: 20230115931
    Abstract: The invention provides novel dosing regimens for Leuco-Methylthioninium (LMT) compounds which maximise the proportion of subjects in which the MT concentration will exceed concentrations in which therapeutic efficacy in relation to treatment of neurodegenerative disorders such as Alzheimer's disease and rontotemporal dementias can be achieved, while maintaining a desirable clinical profile. Also provided are LMT-containing dosage units and other compositions.
    Type: Application
    Filed: October 7, 2022
    Publication date: April 13, 2023
    Applicant: WisTa Laboratories Ltd.
    Inventors: Claude Michel Wischik, Bjorn Olaf Schelter, Helen Christine Shiells
  • Publication number: 20230031369
    Abstract: The present invention relates generally to methods of treatment of Alzheimer's Disease or Mild Cognitive Impairment which are adapted to avoid negative interactions between combinations of therapeutics. In particular there are disclosed such methods of treatment in which the order of therapeutics is actively controlled to mitigate homeostatic downregulation prior to administration of active, for example disease modifying, therapeutic agents. In certain embodiments therapy with symptomatic treatments (such as modifiers of the activity of acetylcholine or glutamate neurotransmitters) may subsequently be combined with the disease modifying or other active treatment. The invention also applies the findings in relation to homeostatic downregulation to novel methods of clinical trial design.
    Type: Application
    Filed: June 30, 2020
    Publication date: February 2, 2023
    Applicant: WisTa Laboratories Ltd.
    Inventors: Gernot Riedel, Valeria Melis, Charles Robert Harrington, Jochen Klein, Grazyna Niewiadomska, Marta Steczkowska, Karima Schwab, Claude Michel Wischil