WO2022017943A1 - Utilisation de cannabidiol dans le traitement de crises associées à une déficience en arginase - Google Patents

Utilisation de cannabidiol dans le traitement de crises associées à une déficience en arginase Download PDF

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Publication number
WO2022017943A1
WO2022017943A1 PCT/EP2021/069878 EP2021069878W WO2022017943A1 WO 2022017943 A1 WO2022017943 A1 WO 2022017943A1 EP 2021069878 W EP2021069878 W EP 2021069878W WO 2022017943 A1 WO2022017943 A1 WO 2022017943A1
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cbd
preparation
seizures
use according
thc
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PCT/EP2021/069878
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English (en)
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Daniel Adam CHECKETTS
Kevin James CRAIG
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GW Research Limited
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/045—Hydroxy compounds, e.g. alcohols; Salts thereof, e.g. alcoholates
    • A61K31/05—Phenols
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/185—Acids; Anhydrides, halides or salts thereof, e.g. sulfur acids, imidic, hydrazonic or hydroximic acids
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/335—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin
    • A61K31/35—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin having six-membered rings with one oxygen as the only ring hetero atom
    • A61K31/352—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin having six-membered rings with one oxygen as the only ring hetero atom condensed with carbocyclic rings, e.g. methantheline 
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/40—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with one nitrogen as the only ring hetero atom, e.g. sulpiride, succinimide, tolmetin, buflomedil
    • A61K31/4015—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with one nitrogen as the only ring hetero atom, e.g. sulpiride, succinimide, tolmetin, buflomedil having oxo groups directly attached to the heterocyclic ring, e.g. piracetam, ethosuximide
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/55—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having seven-membered rings, e.g. azelastine, pentylenetetrazole
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K45/00—Medicinal preparations containing active ingredients not provided for in groups A61K31/00 - A61K41/00
    • A61K45/06—Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A61P25/08—Antiepileptics; Anticonvulsants

Definitions

  • the present invention relates to the use of cannabidiol (CBD) for the treatment of seizures associated with rare epilepsy syndromes.
  • CBD cannabidiol
  • the seizures associated with rare epilepsy syndromes that are treated are those which are experienced in patients diagnosed with arginase deficiency.
  • the types of seizures include focal seizures without impairment and focal seizures with impairment.
  • the dose of CBD is between 5 mg/kg/day to 50 mg/kg/day.
  • the CBD used is in the form of a highly purified extract of cannabis such that the CBD is present at greater than 95% of the total extract (w/w) and the cannabinoid tetrahydrocannabinol (THC) has been substantially removed, to a level of not more than 0.15% (w/w).
  • the CBD used is in the form of a botanically derived purified CBD which comprises greater than or equal to 98% (w/w) CBD and less than or equal to 2% (w/w) of other cannabinoids. More preferably the other cannabinoids present are THC at a concentration of less than or equal to 0.1% (w/w); CBD-C1 at a concentration of less than or equal to 0.15% (w/w); CBDV at a concentration of less than or equal to 0.8% (w/w); and CBD-C4 at a concentration of less than or equal to 0.4% (w/w).
  • the botanically derived purified CBD preferably also comprises a mixture of both trans-THC and cis-THC. Alternatively, a synthetically produced CBD is used.
  • the other cannabinoids present are THC at a concentration of about 0.01% to about 0.1% (w/w); CBD-C1 at a concentration of about 0.1% to about 0.15% (w/w); CBDV at a concentration of about 0.2% to about 0.8% (w/w); and CBD-C4 at a concentration of about 0.3% to about 0.4% (w/w).
  • THC is present at a concentration of about 0.02% to about 0.05% (w/w).
  • the CBD may be formulated for administration separately, sequentially or simultaneously with one or more AED or the combination may be provided in a single dosage form.
  • Epilepsy occurs in approximately 1% of the population worldwide, (Thurman et ai, 2011) of which 70% are able to adequately control their symptoms with the available existing anti-epileptic drugs (AED). However, 30% of this patient group, (Eadie etal., 2012), are unable to obtain seizure freedom from the AED that are available and as such are termed as suffering from intractable or “treatment-resistant epilepsy” (TRE).
  • TRE treatment-resistant epilepsy
  • Intractable or treatment- resistant epilepsy was defined in 2009 by the International League against Epilepsy (I LAE) as “failure of adequate trials of two tolerated and appropriately chosen and used AED schedules (whether as monotherapies or in combination) to achieve sustained seizure freedom ” (Kwan et al., 2009).
  • Childhood epilepsy is a relatively common neurological disorder in children and young adults with a prevalence of approximately 700 per 100,000. This is twice the number of epileptic adults per population.
  • the main symptom of epilepsy is repeated seizures.
  • Clinical observations and electroencephalography (EEG) tests are conducted and the type(s) of seizures are classified according to the ILEA classification.
  • Generalized seizures where the seizure arises within and rapidly engages bilaterally distributed networks, can be split into six subtypes: tonic-clonic (grand mal) seizures; absence (petit mal) seizures; clonic seizures; tonic seizures; atonic seizures and myoclonic seizures.
  • Focal (partial) seizures where the seizure originates within networks limited to only one hemisphere, are also split into sub-categories.
  • the seizure is characterized according to one or more features of the seizure, including aura, motor, autonomic and awareness / responsiveness.
  • a seizure begins as a localized seizure and rapidly evolves to be distributed within bilateral networks this seizure is known as a bilateral convulsive seizure, which is the proposed terminology to replace secondary generalized seizures (generalized seizures that have evolved from focal seizures and are no longer remain localized).
  • focal seizures where the subject’s awareness / responsiveness is altered are referred to as focal seizures with impairment and focal seizures where the awareness or responsiveness of the subject is not impaired are referred to as focal seizures without impairment.
  • Arginase deficiency is an inherited disorder that causes the amino acid arginine and ammonia to accumulate gradually in the blood. Ammonia, which is formed when proteins are broken down in the body, is toxic if levels become too high. The nervous system is especially sensitive to the effects of excess ammonia.
  • Arginase deficiency usually becomes evident by about the age of 3. It most often appears as stiffness, especially in the legs, caused by abnormal tensing of the muscles (spasticity). Other symptoms may include slower than normal growth, developmental delay and eventual loss of developmental milestones, intellectual disability, seizures, tremor, and difficulty with balance and coordination (ataxia).
  • ARG1 gene provides instructions for making an enzyme called arginase. This enzyme controls the final step of the urea cycle, which produces urea by removing nitrogen from arginine.
  • arginase is damaged or missing, and arginine is not broken down properly.
  • urea cannot be produced normally, and excess nitrogen accumulates in the blood in the form of ammonia.
  • the accumulation of ammonia and arginine are believed to cause the neurological problems and other signs and symptoms of arginase deficiency.
  • CBD Cannabidiol
  • US 2019/091174 discloses the use of compounds such as fenfluramine to treat epileptic syndromes, specifically Dravet syndrome.
  • mutation in ARG1 gene is included.
  • CBD in combination with fenfluramine is mentioned as a possible treatment, there is no data provided to support such a statement.
  • CBD cannabidiol
  • the seizures associated with arginase deficiency are focal seizures without impairment and focal seizures with impairment.
  • the CBD preparation comprises greater than 95% (w/w) CBD and not more than 0.15% (w/w) tetrahydrocannabinol (THC).
  • the CBD preparation comprises greater than or equal to 98% (w/w) CBD and less than or equal to 2% (w/w) other cannabinoids, wherein the less than or equal to 2% (w/w) other cannabinoids comprise the cannabinoids tetrahydrocannabinol (THC); cannabidiol- C1 (CBD-C1); cannabidivarin (CBDV); and cannabidiol-C4 (CBD-C4), and wherein the THC is present as a mixture of trans-THC and cis-THC.
  • THC cannabinoids tetrahydrocannabinol
  • CBD-C1 cannabidiol- C1
  • CBDDV cannabidivarin
  • CBD-C4 cannabidiol-C4
  • the CBD preparation is used in combination with one or more concomitant anti-epileptic drugs (AED).
  • AED concomitant anti-epileptic drugs
  • the one or more AED is selected from the group consisting of: levetiracetam; lamotrigine; and oxcarbarmazepine.
  • the CBD is present is isolated from cannabis plant material.
  • the CBD is present as a synthetic preparation.
  • the dose of CBD is greater than 5 mg/kg/day. More preferably the dose of CBD is 20 mg/kg/day. More preferably the dose of CBD is 25 mg/kg/day. More preferably the dose of CBD is 50 mg/kg/day.
  • a method of treating seizures associated with arginase deficiency comprising administering a cannabidiol (CBD) preparation to the subject in need thereof.
  • CBD cannabidiol
  • cannabinoids Over 100 different cannabinoids have been identified, see for example, Handbook of Cannabis, Roger Pertwee, Chapter 1, pages 3 to 15. These cannabinoids can be split into different groups as follows: Phytocannabinoids; Endocannabinoids and Synthetic cannabinoids (which may be novel cannabinoids or synthetically produced phytocannabinoids or endocannabinoids).
  • phytocannabinoids are cannabinoids that originate from nature and can be found in the cannabis plant.
  • the phytocannabinoids can be isolated from plants to produce a highly purified extract or can be reproduced synthetically.
  • “Highly purified cannabinoids” are defined as cannabinoids that have been extracted from the cannabis plant and purified to the extent that other cannabinoids and non-cannabinoid components that are co-extracted with the cannabinoids have been removed, such that the highly purified cannabinoid is greater than or equal to 95% (w/w) pure.
  • Synthetic cannabinoids are compounds that have a cannabinoid or cannabinoid-like structure and are manufactured using chemical means rather than by the plant.
  • Phytocannabinoids can be obtained as either the neutral (decarboxylated form) or the carboxylic acid form depending on the method used to extract the cannabinoids. For example, it is known that heating the carboxylic acid form will cause most of the carboxylic acid form to decarboxylate into the neutral form.
  • Treatment-resistant epilepsy (TRE) or “intractable epilepsy” is defined as per the I LAE guidance of 2009 as epilepsy that is not adequately controlled by trials of one or more AED.
  • “Focal Seizures” are defined as seizures which originate within networks limited to only one hemisphere. What happens during the seizure depends on where in the brain the seizure happens and what that part of the brain normally does.
  • “Focal seizures without impairment” are seizures which originate within networks limited to only one hemisphere where the awareness or responsiveness of the subject is not impaired.
  • “Focal seizures with impairment” usually start in a small area of the temporal lobe or frontal lobe of the brain and involve other areas of the brain within the same hemisphere that affect alertness and awareness. Most subjects experience automatisms during a focal seizure with impaired consciousness. DETAILED DESCRIPTION
  • the drug substance used is a liquid carbon dioxide extract of high-CBD containing chemotypes of Cannabis sativa L. which had been further purified by a solvent crystallization method to yield CBD.
  • the crystallisation process specifically removes other cannabinoids and plant components to yield greater than 95% CBD.
  • CBD is highly purified because it is produced from a cannabis plant rather than synthetically there is a small number of other cannabinoids which are co-produced and co-extracted with the CBD. Details of these cannabinoids and the quantities in which they are present in the medication are as described in Table A below.
  • the drug substance used in the trials is a liquid carbon dioxide extract of high-CBD containing chemotypes of Cannabis sativa L. which had been further purified by a solvent crystallization method to yield CBD.
  • the crystallisation process specifically removes other cannabinoids and plant components to yield greater than 95% CBD w/w, typically greater than 98% w/w.
  • the Cannabis sativa L. plants are grown, harvested, and processed to produce a botanical extract (intermediate) and then purified by crystallization to yield the CBD (botanically derived purified CBD).
  • the plant starting material is referred to as Botanical Raw Material (BRM); the botanical extract is the intermediate; and the active pharmaceutical ingredient (API) is CBD, the drug substance.
  • BRM Botanical Raw Material
  • API active pharmaceutical ingredient
  • Table B CBD botanical raw material specification
  • the purity of the botanically derived purified CBD preparation was greater than or equal to 98%.
  • the botanically derived purified CBD includes THC and other cannabinoids, e.g., CBDA, CBDV, CBD-C1 , and CBD-C4.
  • the CBD preparation comprises not more than 0.15% THC based on total amount of cannabinoid in the preparation. In some embodiments, the CBD preparation comprises about 0.01% to about 0.1% THC based on total amount of cannabinoid in the preparation. In some embodiments, the CBD preparation comprises about 0.02% to about 0.05% THC based on total amount of cannabinoid in the preparation.
  • the CBD preparation comprises about 0.2% to about 1.0% CBDV based on total amount of cannabinoid in the preparation. In some embodiments, the CBD preparation comprises about 0.2% to about 0.8% CBDV based on total amount of cannabinoid in the preparation. [0053] In some embodiments, the CBD preparation comprises about 0.3% to about 0.5%
  • CBD-C4 based on total amount of cannabinoid in the preparation.
  • the CBD preparation comprises about 0.3% to about 0.4% CBD-C4 based on total amount of cannabinoid in the preparation.
  • the CBD preparation comprises about 0.1% to about 0.15% CBD-C1 based on total amount of cannabinoid in the preparation.
  • Distinct chemotypes of the Cannabis sativa L. plant have been produced to maximize the output of the specific chemical constituents, the cannabinoids. Certain chemovars produce predominantly CBD. Only the (-)-trans isomer of CBD is believed to occur naturally. During purification, the stereochemistry of CBD is not affected.
  • High CBD chemovars were grown, harvested, dried, baled and stored in a dry room until required.
  • the botanical raw material (BRM) was finely chopped using an Apex mill fitted with a 1 mm screen. The milled BRM was stored in a freezer prior to extraction.
  • the BDS produced using the methodology above was dispersed in C5-C12 straight chain or branched alkane.
  • the mixture was manually agitated to break up any lumps and the sealed container then placed in a freezer for approximately 48 hours.
  • the crystals were isolated via vacuum filtration, washed with aliquots of cold C5-C12 straight chain or branched alkane, and dried under a vacuum of ⁇ 10mb at a temperature of 60°C until dry.
  • the botanically derived purified CBD preparation was stored in a freezer at -20°C in a pharmaceutical grade stainless steel container, with FDA food grade approved silicone seal and clamps.
  • the botanically derived purified CBD used in the clinical trial described in the invention comprises greater than or equal to 98% (w/w) CBD and less than or equal to 2% (w/w) of other cannabinoids.
  • the other cannabinoids present are THC at a concentration of less than or equal to 0.1% (w/w); CBD-C1 at a concentration of less than or equal to 0.15% (w/w); CBDV at a concentration of less than or equal to 0.8% (w/w); and CBD-C4 at a concentration of less than or equal to 0.4% (w/w).
  • the botanically derived purified CBD used additionally comprises a mixture of both trans-THC and cis-THC. It was found that the ratio of the trans-THC to cis-THC is altered and can be controlled by the processing and purification process, ranging from 3.3:1 (trans-THC:cis- THC) in its unrefined decarboxylated state to 0.8:1 (trans-THC:cis-THC) when highly purified. [0064] Furthermore, the cis-THC found in botanically derived purified CBD is present as a mixture of both the (+)-cis-THC and the (-)-cis-THC isoforms.
  • CBD preparation could be produced synthetically by producing a composition with duplicate components.
  • Example 1 describes the use of a botanically derived purified CBD in an open label, expanded-access program to investigate the clinical efficacy and safety of purified pharmaceutical cannabidiol formulation (CBD) in the treatment of seizures associated with arginase deficiency.
  • CBD cannabidiol formulation
  • EXAMPLE 1 CLINICAL EFFICACY AND SAFETY OF PURIFIED PHARMACEUTICAL CANNABIDIOL (CBD) IN THE TREATMENT OF PATIENTS DIAGNOSED WITH ARGINASE DEFICIENCY Study design
  • the subject was required to be on one or more AEDs at stable doses for a minimum of two weeks prior to baseline and to have stable vagus nerve stimulation (VNS) settings and ketogenic diet ratios for a minimum of four weeks prior to baseline.
  • VNS vagus nerve stimulation
  • the patient was administered botanically derived purified CBD in a 100 mg/ml_ sesame oil-based solution at an initial dose of 5 milligrams per kilogram per day (mg/kg/day) in two divided doses. Dose was then increased weekly by 5mg/kg/day to a goal of 25 mg/kg/day.
  • a maximum dose of 50 mg/kg/day could be utilised for the patient if they were tolerating the medication but had not achieved seizure control; the patient had further weekly titration by 5mg/kg/day.
  • Seizure frequency, intensity, and duration were recorded by caregivers in a diary during a baseline period of at least 28 days. Changes in seizure frequency relative to baseline were calculated after at least 2 weeks and at defined timepoints of treatment.
  • Patients may be defined as responders if they had more than 50% reduction in seizure frequency compared to baseline.
  • the percent change in seizure frequency was calculated as follows:
  • % change ((weekly seizure frequency time interval)- (weekly seizure frequency Baseline)) x100 seizure (weekly seizure frequency Baseline) frequency
  • the percent change of seizure frequency may be calculated for any time interval where seizure number has been recorded.
  • the percent change of seizure frequency for the end of the treatment period was calculated as follows:
  • % reduction ((weekly seizure frequency Baseline) - (weekly seizure frequency End)) x100 seizure frequency (weekly seizure frequency Baseline)
  • Table 2 illustrates the seizure frequency for the patient as well as the dose of CBD given.
  • Table 2 Seizure frequency data for Patient 1
  • Patient 1 was treated for 132 weeks and experienced a 100% reduction in focal seizures without impairment and a 100% reduction in focal seizures with impairment over the treatment period.
  • CBD was effective in reducing the frequency of focal seizures without impairment and focal seizures with impairment.

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Abstract

La présente invention concerne l'utilisation de cannabidiol (CBD) pour le traitement de crises associées à des syndromes d'épilepsie rare. En particulier, les crises associées aux syndromes d'épilepsie rare qui sont traitées sont celles que rencontrent des patients chez lesquels une déficience en arginase a été diagnostiquée. Dans un autre mode de réalisation, les types de crises comprennent des crises partielles sans dégradation et des crises partielles avec déficience. De préférence, la dose de CBD est comprise entre 5 mg/kg/jour et 50 mg/kg/jour.
PCT/EP2021/069878 2020-07-20 2021-07-15 Utilisation de cannabidiol dans le traitement de crises associées à une déficience en arginase WO2022017943A1 (fr)

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GB2011170.4A GB2597319A (en) 2020-07-20 2020-07-20 Use of cannabidiol in the treatment of seizures associated with rare epilepsy syndromes related to genetic abnormalities
GB2011170.4 2020-07-20

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170231923A1 (en) * 2014-10-14 2017-08-17 Gw Pharma Limited Use of cannabidiol in the treatment of epilepsy
US20190091174A1 (en) 2017-09-26 2019-03-28 Zogenix International Limited Method of reducing seizure type experienced by a dravet patient
WO2019207319A1 (fr) * 2018-04-27 2019-10-31 GW Research Limited Préparations de cannabidiol et leurs utilisations

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170231923A1 (en) * 2014-10-14 2017-08-17 Gw Pharma Limited Use of cannabidiol in the treatment of epilepsy
US20190091174A1 (en) 2017-09-26 2019-03-28 Zogenix International Limited Method of reducing seizure type experienced by a dravet patient
WO2019207319A1 (fr) * 2018-04-27 2019-10-31 GW Research Limited Préparations de cannabidiol et leurs utilisations

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
HWANG SEAN T ET AL: "Intractable Generalized Epilepsy: Therapeutic Approaches", CURRENT NEUROLOGY AND NEUROSCIENCE REPORTS, PHILADELPHIA, PA. : CURRENT SCIENCE INC, US, vol. 19, no. 4, 26 February 2019 (2019-02-26), pages 1 - 10, XP036725449, ISSN: 1528-4042, [retrieved on 20190226], DOI: 10.1007/S11910-019-0933-Z *
ROGER PERTWEE: "Handbook of Cannabis", pages: 3 - 15

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