WO2024073849A1 - Composition for treating epilepsy - Google Patents
Composition for treating epilepsy Download PDFInfo
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- WO2024073849A1 WO2024073849A1 PCT/CA2023/051315 CA2023051315W WO2024073849A1 WO 2024073849 A1 WO2024073849 A1 WO 2024073849A1 CA 2023051315 W CA2023051315 W CA 2023051315W WO 2024073849 A1 WO2024073849 A1 WO 2024073849A1
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- cbd
- composition
- omega
- cannabinoid
- fatty acid
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- 239000000203 mixture Substances 0.000 title claims abstract description 30
- 206010015037 epilepsy Diseases 0.000 title claims abstract description 6
- 229930003827 cannabinoid Natural products 0.000 claims abstract description 14
- 239000003557 cannabinoid Substances 0.000 claims abstract description 14
- 235000020660 omega-3 fatty acid Nutrition 0.000 claims abstract description 14
- CYQFCXCEBYINGO-IAGOWNOFSA-N delta1-THC Chemical compound C1=C(C)CC[C@H]2C(C)(C)OC3=CC(CCCCC)=CC(O)=C3[C@@H]21 CYQFCXCEBYINGO-IAGOWNOFSA-N 0.000 claims abstract description 13
- 229940012843 omega-3 fatty acid Drugs 0.000 claims abstract description 13
- 239000007764 o/w emulsion Substances 0.000 claims abstract description 7
- QHMBSVQNZZTUGM-ZWKOTPCHSA-N cannabidiol Chemical compound OC1=CC(CCCCC)=CC(O)=C1[C@H]1[C@H](C(C)=C)CCC(C)=C1 QHMBSVQNZZTUGM-ZWKOTPCHSA-N 0.000 claims description 48
- QHMBSVQNZZTUGM-UHFFFAOYSA-N Trans-Cannabidiol Natural products OC1=CC(CCCCC)=CC(O)=C1C1C(C(C)=C)CCC(C)=C1 QHMBSVQNZZTUGM-UHFFFAOYSA-N 0.000 claims description 47
- 229950011318 cannabidiol Drugs 0.000 claims description 47
- ZTGXAWYVTLUPDT-UHFFFAOYSA-N cannabidiol Natural products OC1=CC(CCCCC)=CC(O)=C1C1C(C(C)=C)CC=C(C)C1 ZTGXAWYVTLUPDT-UHFFFAOYSA-N 0.000 claims description 47
- PCXRACLQFPRCBB-ZWKOTPCHSA-N dihydrocannabidiol Natural products OC1=CC(CCCCC)=CC(O)=C1[C@H]1[C@H](C(C)C)CCC(C)=C1 PCXRACLQFPRCBB-ZWKOTPCHSA-N 0.000 claims description 47
- MBMBGCFOFBJSGT-KUBAVDMBSA-N all-cis-docosa-4,7,10,13,16,19-hexaenoic acid Chemical compound CC\C=C/C\C=C/C\C=C/C\C=C/C\C=C/C\C=C/CCC(O)=O MBMBGCFOFBJSGT-KUBAVDMBSA-N 0.000 claims description 30
- JAZBEHYOTPTENJ-JLNKQSITSA-N all-cis-5,8,11,14,17-icosapentaenoic acid Chemical compound CC\C=C/C\C=C/C\C=C/C\C=C/C\C=C/CCCC(O)=O JAZBEHYOTPTENJ-JLNKQSITSA-N 0.000 claims description 20
- 235000020673 eicosapentaenoic acid Nutrition 0.000 claims description 20
- 229960005135 eicosapentaenoic acid Drugs 0.000 claims description 20
- JAZBEHYOTPTENJ-UHFFFAOYSA-N eicosapentaenoic acid Natural products CCC=CCC=CCC=CCC=CCC=CCCCC(O)=O JAZBEHYOTPTENJ-UHFFFAOYSA-N 0.000 claims description 20
- 235000020669 docosahexaenoic acid Nutrition 0.000 claims description 17
- 229940090949 docosahexaenoic acid Drugs 0.000 claims description 15
- DVSZKTAMJJTWFG-SKCDLICFSA-N (2e,4e,6e,8e,10e,12e)-docosa-2,4,6,8,10,12-hexaenoic acid Chemical compound CCCCCCCCC\C=C\C=C\C=C\C=C\C=C\C=C\C(O)=O DVSZKTAMJJTWFG-SKCDLICFSA-N 0.000 claims description 2
- GZJLLYHBALOKEX-UHFFFAOYSA-N 6-Ketone, O18-Me-Ussuriedine Natural products CC=CCC=CCC=CCC=CCC=CCC=CCCCC(O)=O GZJLLYHBALOKEX-UHFFFAOYSA-N 0.000 claims description 2
- KAUVQQXNCKESLC-UHFFFAOYSA-N docosahexaenoic acid (DHA) Natural products COC(=O)C(C)NOCC1=CC=CC=C1 KAUVQQXNCKESLC-UHFFFAOYSA-N 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims 1
- 241000699670 Mus sp. Species 0.000 description 15
- 239000002245 particle Substances 0.000 description 13
- 238000004945 emulsification Methods 0.000 description 10
- 238000012360 testing method Methods 0.000 description 8
- 239000003981 vehicle Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 206010010904 Convulsion Diseases 0.000 description 6
- 239000003814 drug Substances 0.000 description 6
- 229940079593 drug Drugs 0.000 description 6
- 238000009472 formulation Methods 0.000 description 6
- 231100000419 toxicity Toxicity 0.000 description 6
- 230000001988 toxicity Effects 0.000 description 6
- 239000007924 injection Substances 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 230000000573 anti-seizure effect Effects 0.000 description 4
- 231100000673 dose–response relationship Toxicity 0.000 description 4
- 239000003381 stabilizer Substances 0.000 description 4
- 206010003591 Ataxia Diseases 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 235000021323 fish oil Nutrition 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 210000003141 lower extremity Anatomy 0.000 description 2
- 239000008389 polyethoxylated castor oil Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 231100000161 signs of toxicity Toxicity 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 230000001256 tonic effect Effects 0.000 description 2
- 231100000048 toxicity data Toxicity 0.000 description 2
- 238000010171 animal model Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- 229940065144 cannabinoids Drugs 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001037 epileptic effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000013101 initial test Methods 0.000 description 1
- 239000007928 intraperitoneal injection Substances 0.000 description 1
- 238000002483 medication Methods 0.000 description 1
- 235000019198 oils Nutrition 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000007619 statistical method Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 231100001274 therapeutic index Toxicity 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C57/00—Unsaturated compounds having carboxyl groups bound to acyclic carbon atoms
- C07C57/02—Unsaturated compounds having carboxyl groups bound to acyclic carbon atoms with only carbon-to-carbon double bonds as unsaturation
- C07C57/03—Monocarboxylic 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
- A61K31/185—Acids; Anhydrides, halides or salts thereof, e.g. sulfur acids, imidic, hydrazonic or hydroximic acids
- A61K31/19—Carboxylic acids, e.g. valproic acid
- A61K31/20—Carboxylic acids, e.g. valproic acid having a carboxyl group bound to a chain of seven or more carbon atoms, e.g. stearic, palmitic, arachidic acids
- A61K31/202—Carboxylic acids, e.g. valproic acid having a carboxyl group bound to a chain of seven or more carbon atoms, e.g. stearic, palmitic, arachidic acids having three or more double bonds, e.g. linolenic
-
- 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
- A61K31/658—Medicinal preparations containing organic active ingredients o-phenolic cannabinoids, e.g. cannabidiol, cannabigerolic acid, cannabichromene or tetrahydrocannabinol
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/10—Dispersions; Emulsions
- A61K9/107—Emulsions ; Emulsion preconcentrates; Micelles
- A61K9/1075—Microemulsions or submicron emulsions; Preconcentrates or solids thereof; Micelles, e.g. made of phospholipids or block copolymers
-
- 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
- Epilepsy deleteriously affects millions of people worldwide.
- CBD cannabidiol
- Forming one aspect of the invention is a composition for use in the treatment of epilepsy, the composition comprising at least one cannabinoid and at least one omega-3 fatty acid.
- the composition can be in the form of an oil in water emulsion.
- the at least one cannabinoid is dissolved in the at least one omega-3 fatty acid and the at least one omega-3 fatty acid can define the oil in the oil in water emulsion.
- the at least one cannabinoid can comprise cannabidiol (CBD).
- CBD cannabidiol
- the at least one omega-3 fatty acid can comprise one or more of Docosahexaenoic acid (DHA) and Eicosapentaenoic acid (EPA).
- DHA Docosahexaenoic acid
- EPA Eicosapentaenoic acid
- the weight ratio of the at least one cannabinoid to the at least one omega-3 fatty acid can be about 1 :1
- the weight ratio of DHA to EPA can be about 1 :1
- Fig. 1 shows the effects of two preparations of CBD in the MES model in mice.
- composition was prepared with the following ingredients, expressed in weight %
- the CBD was isolate powder.
- the fish oil was unoxidized (fresh) with roughly equal amounts DHA and EPA.
- the stabilizer was LSO NanoStabilizer obtained from Sonomechanics (USA).
- the composition was tested using the Maximal Electroshock Seizure (MES) Model. This is an established procedure to provide an indication of a compound’s ability to prevent seizure spread.
- mice Male, CF-1 male mice (18-25 grams) were used as subjects. They were housed under standard conditions in the vivarium at the CCBR. They were given 2 days (minimum) to acclimate before testing began.
- Drugs and Doses CBD was provided in pure form and in the described composition. Two four-point dose-response curves were done, one for the pure form CBD and one for the described composition. Ten mice were tested at each dose. (Mice were not re-used.) Compounds were injected intraperitoneally. Testing was done 2 hours after injection. Drugs were injected at a constant volume, and were diluted as necessary using a vehicle of 1 :1: 18 (Cremophor : alcohol : saline). Dilution is necessary to achieve volumes large enough for injection. Doses were: 0 (vehicle), 25, 50, 100, 200 mg/kg. A 400 mg/kg dose was added later to extend the standard CBD curve.
- the MES stimulus consisted of 0.2 sec of 60 Hz since-wave current administered at an intensity of 50 mA via corneal electrodes. The percentage of mice protected against the tonic hindlimb extension component of the resulting seizure was measured. Mice were then euthanized following the procedure.
- Toxicity Assessment Ataxia (impaired movement) was assessed using the Loscher scale and was done just before the MES test.
- Figure 1 shows dose-response curve for the antiseizure effects of the two forms of CBD in the MES test in mice.
- the ED50 (effective dose to protect 50% of mice) for regular CBD was 162 mg/kg and the ED50 for the described composition was 105 mg/kg.
- the ED50 for the described formulation was considerably lower. This difference was statistically significant.
- the described composition produced some toxicity at the highest dose, which suggests that more CBD was getting into the brain.
- mice Male, CF-1 male mice (18-25 grams) were used as subjects. They were housed under standard conditions in a vivarium at the University of Toronto (CCBR). They were given 2 days (minimum) to acclimate before testing began.
- CCBR University of Toronto
- Drugs and Doses CBD was provided in the form of: 1) standard CBD isolate, 2) CBD in DHA/EPA without emulsification (2% DHA, 2% EPA, 12% “stabilizer”), 3) CBD emulsified in DHA/EPA to produce larger particles (66.2 nm diameter) and 4) CBD emulsified in DHA/EPA to produce smaller particles (32.7 nm diameter).
- Drugs were injected intraperitoneally at a constant volume, and were diluted as necessary using a vehicle of 1 :1 :18 (Cremophor : alcohol : saline). Dilution is necessary to achieve volumes large enough for injection.
- Doses of CBD ranged from 0 (vehicle) to 400 mg/kg. As in our past studies, the MES stimulus was given 2 hours after injection. Dose-response curves were done for each formulation.
- the MES stimulus consisted of 0.2 sec of 60 Hz since-wave current administered at an intensity of 50 mA via corneal electrodes. The percentage of mice protected against the tonic hindlimb extension component of the resulting seizure was measured. Mice were used only once and euthanized following the procedure.
- Toxicity Assessment Ataxia was assessed using the Loscher scale and was done just before the MES test. Loscher scores of 2-5 were scored a “toxicity present”.
- Statistical Analysis ED50 for protection i.e. , 50% of mice show protection was determined using the Litchfield and Wilcoxon method as implemented by the LW1949 package (ver. 1.1.0) in the RStudio (2022.07.2) programming environment (Adams et al., 2016; Litchfield and Wilcoxon, 1949). ED50’s are presented with 95% confidence intervals. The ED50 for the different formulations were compared using the z-test method described by Austin and Hux (2002). A ztest statistic greater than 1.96 (P ⁇ 0.05) was considered significant when 95% confidence intervals overlapped. The Litchfield/Wilcoxon method could not be applied to the toxicity data for technical reasons, so TD50s were calculated from line plots.
- Figure 2 A, B, C and D shows dose-response curves for the four formulations in the MES test in mice.
- the ED50 (effective dose to protect 50% of mice) for regular CBD in the standard vehicle was 146 mg/kg (Figure 2A).
- the ED50 for CBD in DHA/EPA was tested to determine whether DHA/EPA alone increased CBD’s effectiveness.
- the ED50 for CBD in DHA/EPA without emulsification was 212 mg/kg, which is higher than the ED50 for CBD alone ( Figure 1 B). This difference when compared to CBD in the standard vehicle was not significant, but the findings do not suggest that adding DHA/EPA improves CBD’s anti-seizure effects.
- the ED50 for the large particle emulsification in DHA/EPA was 121 mg/kg, which is lower than the ED50 for CBD alone ( Figure 2C). This difference when compared to CBD in the standard vehicle was not significant.
- the ED50 for the small particle emulsification in DHA/EPA was 102 mg/kg (Figure 2D). This difference when compared to CBD in the standard vehicle was significant.
- FIG. 3 A and B present the toxicity data for CBD alone and CBD emulsified to smaller particles. Neither of the other preparations showed any toxicity up to doses of 400 mg/kg.
- CBD alone showed a TD25 at 400 mg/kg, the highest dose tested. It is speculated that the TD50 would be higher than 400 mg/kg ( Figure 3A).
- the TD50 for CBD emulsified to small particles was 300 mg/kg ( Figure 3B). This is lower than the TD50 for CBD alone, consistent with the idea that more CBD crosses barriers in the small particle formulation.
- the therapeutic index (TD50/ED50) for CBD in the small particle is still about 3, which is in the acceptable range.
- CBD emulsified into small particles was the most effective formulation.
- the ED50 for CBD emulsified into small particles was the lowest, and was significantly different from CBD alone.
- omega-3 fatty acid can be utilized, other stabilizers can be utilized and the weight ratio of fatty acid to cannabinoid can be varied.
- the ratio of cannabinoid to omega 3 can vary between 1.5:1 and 4:1.
- intraperitoneal injection was utilized, other forms are injection could be utilized.
- many drugs introduced intraperitonally can also be introduced orally.
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- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Medicinal Chemistry (AREA)
- Pharmacology & Pharmacy (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Epidemiology (AREA)
- Engineering & Computer Science (AREA)
- Pain & Pain Management (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Biomedical Technology (AREA)
- Neurology (AREA)
- Neurosurgery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Biophysics (AREA)
- Molecular Biology (AREA)
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- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
Abstract
The cunent application relates to a composition comprising at least one cannabinoid and at least one omega- 3 fatty acid in the form of an oil-in-water emulsion; wherein the at least one cannabinoid is dissolved in the at least one omega-3 fatty acid and the at least one omega- 3 fatty acid defines the oil phase of the oil-in-water emulsion. The composition is used for the treatment of epilepsy with improved efficacy compared to regular cannabinoid in standard vehicle.
Description
COMPOSITION FOR TREATING EPILEPSY
Background
Epilepsy deleteriously affects millions of people worldwide.
Many epileptics have seizures that are not readily controlled with conventional medications.
In animal models and clinical trials, cannabinoids, and especially cannabidiol (CBD) have been shown to stop seizures.
Summary of the Invention
Forming one aspect of the invention is a composition for use in the treatment of epilepsy, the composition comprising at least one cannabinoid and at least one omega-3 fatty acid.
According to another aspect, the composition can be in the form of an oil in water emulsion.
According to another aspect, the at least one cannabinoid is dissolved in the at least one omega-3 fatty acid and the at least one omega-3 fatty acid can define the oil in the oil in water emulsion.
According to another aspect, the at least one cannabinoid can comprise cannabidiol (CBD).
According to another aspect, the at least one omega-3 fatty acid can comprise one or more of Docosahexaenoic acid (DHA) and Eicosapentaenoic acid (EPA).
According to another aspect, the weight ratio of the at least one cannabinoid to the at least one omega-3 fatty acid can be about 1 :1
According to another aspect, the weight ratio of DHA to EPA can be about 1 :1
Advantages, features and characteristics of the present invention will become apparent upon a review of the following detailed description, with reference to the figures, the latter being briefly described hereinafter.
Brief Description of the Figures
Fig. 1 shows the effects of two preparations of CBD in the MES model in mice.
Detailed Description
A composition was prepared with the following ingredients, expressed in weight %
Fish Oil (DHA & EPA) 3.5%
CBD - 2.0%
Stabilizer - 6.5%
Distilled water - 88.0%
Total 100.0%
The CBD was isolate powder. The fish oil was unoxidized (fresh) with roughly equal amounts DHA and EPA. The stabilizer was LSO NanoStabilizer obtained from Sonomechanics (USA).
The above created an oil in water emulsion as follows:
• particle size 66.2 +/- 0.1 nm
• polydispersity index = 0.107 +/- 0.008
Experimental
The composition was tested using the Maximal Electroshock Seizure (MES) Model. This is an established procedure to provide an indication of a compound’s ability to prevent seizure spread.
Initial Tests
Subjects Male, CF-1 male mice (18-25 grams) were used as subjects. They were housed under standard conditions in the vivarium at the CCBR. They were given 2 days (minimum) to acclimate before testing began.
Drugs and Doses CBD was provided in pure form and in the described composition. Two four-point dose-response curves were done, one for the pure form CBD and one for the described composition. Ten mice were tested at each dose. (Mice were not re-used.) Compounds were injected intraperitoneally. Testing was done 2 hours after injection. Drugs were injected at a constant volume, and were diluted as necessary using a vehicle of 1 :1: 18 (Cremophor : alcohol : saline). Dilution is necessary to achieve volumes large enough for injection. Doses were: 0 (vehicle), 25, 50, 100, 200 mg/kg. A 400 mg/kg dose was added later to extend the standard CBD curve.
MES Procedure The MES stimulus consisted of 0.2 sec of 60 Hz since-wave current administered at an intensity of 50 mA via corneal electrodes. The percentage of mice protected against the tonic hindlimb extension component of the resulting seizure was measured. Mice were then euthanized following the procedure.
Toxicity Assessment Ataxia (impaired movement) was assessed using the Loscher scale and was done just before the MES test.
Results
Antiseizure effects Figure 1 shows dose-response curve for the antiseizure effects of the two forms of CBD in the MES test in mice. The ED50 (effective dose to protect 50% of mice) for regular CBD was 162 mg/kg and the ED50 for the described composition was 105 mg/kg. The ED50 for the described formulation was considerably lower. This difference was statistically significant.
Toxicity No mice showed any signs of toxicity in the standard CBD group at any dose. In the new composition group two subjects showed moderate signs of toxicity (Loscher scale 3) at the highest dose.
Discussion The described composition appeared more effective than regular CBD.
The described composition produced some toxicity at the highest dose, which suggests that more CBD was getting into the brain.
Further Tests
Subjects Male, CF-1 male mice (18-25 grams) were used as subjects. They were housed under standard conditions in a vivarium at the University of Toronto (CCBR). They were given 2 days (minimum) to acclimate before testing began.
Drugs and Doses CBD was provided in the form of: 1) standard CBD isolate, 2) CBD in DHA/EPA without emulsification (2% DHA, 2% EPA, 12% “stabilizer”), 3) CBD emulsified in DHA/EPA to produce larger particles (66.2 nm diameter) and 4) CBD emulsified in DHA/EPA to produce smaller particles (32.7 nm diameter). Drugs were injected intraperitoneally at a constant volume, and were diluted as necessary using a vehicle of 1 :1 :18 (Cremophor : alcohol : saline). Dilution is necessary to achieve volumes large enough for injection. Doses of CBD ranged from 0 (vehicle) to 400 mg/kg. As in our past studies, the MES stimulus was given 2 hours after injection. Dose-response curves were done for each formulation.
MES Procedure The MES stimulus consisted of 0.2 sec of 60 Hz since-wave current administered at an intensity of 50 mA via corneal electrodes. The percentage of mice protected against the tonic hindlimb extension component of the resulting seizure was measured. Mice were used only once and euthanized following the procedure.
Toxicity Assessment Ataxia (impaired movement) was assessed using the Loscher scale and was done just before the MES test. Loscher scores of 2-5 were scored a “toxicity present”. Statistical Analysis ED50 for protection (i.e. , 50% of mice show protection) was determined using the Litchfield and Wilcoxon method as implemented by the LW1949 package (ver. 1.1.0) in the RStudio (2022.07.2) programming environment (Adams et al., 2016; Litchfield and Wilcoxon, 1949). ED50’s are presented with 95% confidence intervals. The ED50 for the different formulations were compared using the z-test method described by Austin and Hux (2002). A ztest statistic greater than 1.96 (P<0.05) was considered significant when 95% confidence intervals overlapped.
The Litchfield/Wilcoxon method could not be applied to the toxicity data for technical reasons, so TD50s were calculated from line plots.
Results
Antiseizure effects Figure 2 A, B, C and D shows dose-response curves for the four formulations in the MES test in mice.
The ED50 (effective dose to protect 50% of mice) for regular CBD in the standard vehicle was 146 mg/kg (Figure 2A).
The ED50 for CBD in DHA/EPA was tested to determine whether DHA/EPA alone increased CBD’s effectiveness. The ED50 for CBD in DHA/EPA without emulsification was 212 mg/kg, which is higher than the ED50 for CBD alone (Figure 1 B). This difference when compared to CBD in the standard vehicle was not significant, but the findings do not suggest that adding DHA/EPA improves CBD’s anti-seizure effects.
The ED50 for the large particle emulsification in DHA/EPA was 121 mg/kg, which is lower than the ED50 for CBD alone (Figure 2C). This difference when compared to CBD in the standard vehicle was not significant.
The ED50 for the small particle emulsification in DHA/EPA was 102 mg/kg (Figure 2D). This difference when compared to CBD in the standard vehicle was significant.
Taken together, the results of the last two experiments suggest that emulsification increases the effectiveness of CBD, and that emulsification to a smaller particle size is better than emulsification to a larger particle size
Toxic Effects Figure 3 A and B present the toxicity data for CBD alone and CBD emulsified to smaller particles. Neither of the other preparations showed any toxicity up to doses of 400 mg/kg.
As indicated, CBD alone showed a TD25 at 400 mg/kg, the highest dose tested. It is speculated that the TD50 would be higher than 400 mg/kg (Figure 3A).
The TD50 for CBD emulsified to small particles was 300 mg/kg (Figure 3B). This is lower than the TD50 for CBD alone, consistent with the idea that more CBD crosses barriers in the small particle formulation. The therapeutic index (TD50/ED50) for CBD in the small particle is still about 3, which is in the acceptable range.
Discussion
CBD emulsified into small particles was the most effective formulation.
The ED50 for CBD emulsified into small particles was the lowest, and was significantly different from CBD alone.
Adding DHA/EPA to CBD without emulsification did not lower the ED50 for CBD.
The results suggest that micro-emulsification increases the potency of CBD, but that adding DHA/EPA to CBD without emulsification does not.
Variations
Whereas a specific composition is shown, variations are possible.
Without limitation in this regard, other sources of omega-3 fatty acid can be utilized, other stabilizers can be utilized and the weight ratio of fatty acid to cannabinoid can be varied. The ratio of cannabinoid to omega 3 can vary between 1.5:1 and 4:1.
Further, whereas intraperitoneal injection was utilized, other forms are injection could be utilized. For example, it is well known that many drugs introduced intraperitonally can also be introduced orally.
Accordingly, the invention should be understood to be limited only by the accompanying claims, purposively construed.
Claims
1. A composition for use in the treatment of epilepsy, the composition comprising at least one cannabinoid and at least one omega-3 fatty acid.
2. The composition of claim 1 , further comprising water and in the form of an oil in water emulsion.
3. The composition of claim 2, wherein the at least one cannabinoid is dissolved in the at least one omega-3 fatty acid and the at least one omega-3 fatty acid defines the oil in the oil in water emulsion.
4. The composition of claim 3, wherein the at least one cannabinoid comprises cannabidiol (CBD).
5. The composition of claim 4, wherein the at least one omega-3 fatty acid comprises one or more of Docosahexaenoic acid (DHA) and Eicosapentaenoic acid (EPA).
6. The composition of claim 4, wherein the weight ratio of the at least one cannabinoid to the at least one omega-3 fatty is acid is about 1 :1
7. The composition of claim 5, wherein the weight ratio of DHA to EPA is about 1 :1
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US202263414421P | 2022-10-07 | 2022-10-07 | |
US63/414,421 | 2022-10-07 | ||
US202263428157P | 2022-11-28 | 2022-11-28 | |
US63/428,157 | 2022-11-28 |
Publications (1)
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CA3112583A1 (en) * | 2018-07-09 | 2020-01-16 | New Age Nanotech Llc | Stabilized formulations of cannabinoid compositions |
CA3110447A1 (en) * | 2018-08-27 | 2020-03-05 | Emerald Health Therapeutics Canada Inc. | Improved cannabinoid bioavailability |
WO2020123407A1 (en) * | 2018-12-11 | 2020-06-18 | Disruption Labs Inc. | Compositions for the delivery of therapeutic agents and methods of use and making thereof |
WO2021003341A1 (en) * | 2019-07-02 | 2021-01-07 | Ellevet Sciences | Hemp extract for treatment of pain, cancer and epilepsy in animals |
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CA3112583A1 (en) * | 2018-07-09 | 2020-01-16 | New Age Nanotech Llc | Stabilized formulations of cannabinoid compositions |
CA3110447A1 (en) * | 2018-08-27 | 2020-03-05 | Emerald Health Therapeutics Canada Inc. | Improved cannabinoid bioavailability |
WO2020123407A1 (en) * | 2018-12-11 | 2020-06-18 | Disruption Labs Inc. | Compositions for the delivery of therapeutic agents and methods of use and making thereof |
WO2021003341A1 (en) * | 2019-07-02 | 2021-01-07 | Ellevet Sciences | Hemp extract for treatment of pain, cancer and epilepsy in animals |
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ALESSANDRA MORANO, MARTINA FANELLA, MARIARITA ALBINI, PIERANGELO CIFELLI, ELEONORA PALMA, ANNA TERESA GIALLONARDO, CARLO DI BONAVE: "Cannabinoids in the Treatment of Epilepsy: Current Status and Future Prospects", NEUROPSYCHIATRIC DISEASE AND TREATMENT, vol. Volume 16, pages 381 - 396, XP093159617, ISSN: 1178-2021, DOI: 10.2147/NDT.S203782 * |
ALEXIS ARZIMANOGLOU; ULRICH BRANDL; J. HELEN CROSS; ANTONIO GIL‐NAGEL; LIEVEN LAGAE; CECILIE JOHANNESSEN LANDMARK; NICOLA SPECCHIO: "Epilepsy and cannabidiol: a guide to treatment", EPILEPTIC DISORDERS, JOHN LIBBEY EUROTEXT, MONTROUGE, FR, vol. 22, no. 1, 13 March 2020 (2020-03-13), FR , pages 1 - 14, XP072014884, ISSN: 1294-9361, DOI: 10.1684/epd.2020.1141 * |
GASTON TYLER E.; FRIEDMAN DANIEL: "Pharmacology of cannabinoids in the treatment of epilepsy", EPILEPSY AND BEHAVIOR, ACADEMIC PRESS, SAN DIEGO, CA, US, vol. 70, 10 January 2017 (2017-01-10), US , pages 313 - 318, XP085033472, ISSN: 1525-5050, DOI: 10.1016/j.yebeh.2016.11.016 * |
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