E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
Glucose Transporter Type 1 deficiency syndrome |
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E.1.1.1 | Medical condition in easily understood language |
Glucose transporter type 1 (Glut1) deficiency syndrome is a rare genetic metabolic disorder characterized by deficiency of a protein that is required for glucose to cross the blood-brain barrier |
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E.1.1.2 | Therapeutic area | Diseases [C] - Nervous System Diseases [C10] |
MedDRA Classification |
E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 14.1 |
E.1.2 | Level | HLGT |
E.1.2 | Classification code | 10039911 |
E.1.2 | Term | Seizures (incl subtypes) |
E.1.2 | System Organ Class | 10029205 - Nervous system disorders |
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E.1.3 | Condition being studied is a rare disease | Yes |
E.2 Objective of the trial |
E.2.1 | Main objective of the trial |
Primary Objectives:
• Evaluate the efficacy of UX007 compared to placebo, between Weeks 2 and 8 of treatment, as measured by the reduction from baseline in frequency of generalized or partial-onset seizures
• Evaluate the safety of UX007 via adverse event (AE) rates, laboratory values, and electrocardiogram (ECG)
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E.2.2 | Secondary objectives of the trial |
Secondary Objectives:
• Seizure response rate, defined as the percentage of subjects with at least 50% reduction from baseline in generalized or partial-onset seizures
• Change from baseline in frequency of seizure activity as measured by electroencephalography (EEG) abnormalities
• Change from baseline in cognitive function using the Cambridge Neuropsychological Test Automated Battery (CANTAB)
• Change from baseline in distance walked as measured by 6MWT
• Time to onset of paroxysmal exertional dyskinesia (PED) as measured during 6MWT.
• Change from baseline in gross motor function using the Gross Motor Function Measure-88 (GMFM-88)
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E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
1) Diagnosis of Glut1 DS confirmed by SLC2A1 mutation
2) Males and females, aged 3 - 17 years (inclusive) at the time of informed consent
3) Average of at least 5 observable seizures (generalized [except absence] or partial-onset [simple partial motor, complex partial, or secondarily generalized] seizures) per month over the last 6 months, by subject or caregiver report
4) At least 4 observable seizures (generalized [except absence] or partial-onset [simple partial motor, complex partial, or secondarily generalized] seizures) per month during the Baseline Period, with no 3-week seizure-free period during the Baseline Period
5) Continuing to have seizures despite a prior or current use of at least 1 AED
6) Allowed to be on 1 - 3 concomitant AEDs that must have been stable in dose at least 2 weeks prior to the beginning of screening and anticipated to remain stable in dose through the end of the 8-week, placebo-controlled Treatment Period
7) Not on, or not fully compliant with a prescribed diet plan (e.g. ketogenic diet) comprised of at least 50% total daily caloric intake from fat during previous 60 days (confirmed by 3-day diet diary at Screening), or at any time during the course of the trial
8) Plasma level of beta-hydroxybutyrate (BHB) ≤ 1 mmol/L (non-fasting) at Screening
9) Naïve to triheptanoin
10) Provide written or verbal assent (if possible) and written informed consent by a legally authorized representative after the nature of the study has been explained, and prior to any research-related procedures
11) Must, in the opinion of the investigator, be willing and able to complete all aspects of the study, comply with accurate completion of the seizures diary, and likely to complete the 8 week, placebo-controlled, Treatment Period
12) Females who have reached menarche must have a negative pregnancy test at Screening. If sexually active, subject must be willing to use acceptable method of contraception and have additional pregnancy tests during the study.
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E.4 | Principal exclusion criteria |
1) Serum alanine aminotransferase (ALT) or aspartate aminotransferase (AST) levels exceeding 2X the upper limit of normal at Screening
2) Any known hypersensitivity to triheptanoin or safflower oil that, in the judgment of the investigator, places the subject at increased risk for adverse effects
3) History of, or current suicidal ideation, behavior and/or attempts
4) Breastfeeding an infant at Screening
5) Participants unwilling or unable to discontinue use of a prohibited medication or other substance that may confound study objectives
6) Use of any investigational product (drug or supplement, including medium chain triglyceride [MCT] oil) within 30 days prior to Screening, or at any time during the study
7) Has a condition of such severity and acuity, in the opinion of the investigator, that it warrants immediate surgical intervention or other treatment
8) Has a concurrent disease or condition, or laboratory abnormality that, in the view of the investigator, places the subject at high risk of poor treatment compliance or of not completing the study, or would interfere with study participation or introduces additional safety concerns (e.g., diabetes mellitus, other concurrent neurological or psychiatric disorders)
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E.5 End points |
E.5.1 | Primary end point(s) |
The primary efficacy evaluation is the reduction from baseline in monthly frequency of generalized or partial-onset seizures between Weeks 2 and 8. The baseline monthly frequency is defined as the number of generalized or partial-onset seizures experienced in the 6 weeks prior to randomization, normalized to a 4-week rate. The primary efficacy comparison, as well as secondary and exploratory analysis of the primary endpoint will be described in the SAP. |
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E.5.1.1 | Timepoint(s) of evaluation of this end point |
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E.5.2 | Secondary end point(s) |
The secondary efficacy analyses are primarily focused on alternative domains of Glut1 DS disease to assess the breadth of treatment effect of UX007. The secondary analyses will compare the secondary efficacy variables scores after treatment to before treatment between the treated and placebo groups. The specific tests and analyses will be defined in the SAP.
Included in these analyses will be a predefined per protocol analysis of those subjects that achieve at least 30% of calorie intake or higher as the tolerated dose level and have received at least 80% of the expected doses, to assess whether a subpopulation of the highest dose subjects have a larger difference in efficacy.
Each of the efficacy variables assessed at Week 52 (or Week 26 for EEG only) will be compared to the value obtained at the baseline visit (or screening visit if not performed at the baseline visit) utilizing the same statistical test as conducted at the Week 8 analysis, but adjusted for the difference that the analyses for the Week 52 data will only utilize a within-cohort comparison and not a between-cohort comparison.
Change-from-baseline values (where applicable) will be provided for the following secondary efficacy variables at baseline and Week 8:
• The reduction from baseline to Week 8 in frequency of generalized tonic-clonic seizures.
• Seizure response rate, defined as the percentage of subjects with at least 50% reduction from baseline in generalized or partial-onset seizures.
• The change from baseline to Week 8 EEG abnormalities (including absence seizures) as determined by overnight EEG
• The change from baseline to Week 8 in the individual scores for the CANTAB MOT, PAL, RTI, SSP and SWM tests.
• The change from baseline to Week 8 6MWT distance and percent of predicted 6MWT distance.
• Time to onset of PED during 6MWT.
• The change from baseline to Week 8 in the GMFM-88 total score and 5 domain scores.
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E.5.2.1 | Timepoint(s) of evaluation of this end point |
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E.6 and E.7 Scope of the trial |
E.6 | Scope of the trial |
E.6.1 | Diagnosis | No |
E.6.2 | Prophylaxis | No |
E.6.3 | Therapy | No |
E.6.4 | Safety | Yes |
E.6.5 | Efficacy | Yes |
E.6.6 | Pharmacokinetic | Yes |
E.6.7 | Pharmacodynamic | No |
E.6.8 | Bioequivalence | No |
E.6.9 | Dose response | No |
E.6.10 | Pharmacogenetic | No |
E.6.11 | Pharmacogenomic | No |
E.6.12 | Pharmacoeconomic | No |
E.6.13 | Others | No |
E.7 | Trial type and phase |
E.7.1 | Human pharmacology (Phase I) | No |
E.7.1.1 | First administration to humans | No |
E.7.1.2 | Bioequivalence study | No |
E.7.1.3 | Other | No |
E.7.1.3.1 | Other trial type description | |
E.7.2 | Therapeutic exploratory (Phase II) | Yes |
E.7.3 | Therapeutic confirmatory (Phase III) | No |
E.7.4 | Therapeutic use (Phase IV) | No |
E.8 Design of the trial |
E.8.1 | Controlled | Yes |
E.8.1.1 | Randomised | Yes |
E.8.1.2 | Open | No |
E.8.1.3 | Single blind | No |
E.8.1.4 | Double blind | Yes |
E.8.1.5 | Parallel group | Yes |
E.8.1.6 | Cross over | No |
E.8.1.7 | Other | No |
E.8.2 | Comparator of controlled trial |
E.8.2.1 | Other medicinal product(s) | No |
E.8.2.2 | Placebo | Yes |
E.8.2.3 | Other | No |
E.8.2.4 | Number of treatment arms in the trial | 2 |
E.8.3 |
The trial involves single site in the Member State concerned
| Yes |
E.8.4 | The trial involves multiple sites in the Member State concerned | No |
E.8.5 | The trial involves multiple Member States | Yes |
E.8.5.1 | Number of sites anticipated in the EEA | 4 |
E.8.6 Trial involving sites outside the EEA |
E.8.6.1 | Trial being conducted both within and outside the EEA | Yes |
E.8.6.2 | Trial being conducted completely outside of the EEA | No |
E.8.6.3 | If E.8.6.1 or E.8.6.2 are Yes, specify the regions in which trial sites are planned |
France |
Italy |
Netherlands |
United Kingdom |
United States |
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E.8.7 | Trial has a data monitoring committee | Yes |
E.8.8 |
Definition of the end of the trial and justification where it is not the last
visit of the last subject undergoing the trial
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E.8.9 Initial estimate of the duration of the trial |
E.8.9.1 | In the Member State concerned years | 2 |
E.8.9.1 | In the Member State concerned months | 0 |
E.8.9.1 | In the Member State concerned days | 0 |
E.8.9.2 | In all countries concerned by the trial years | 2 |
E.8.9.2 | In all countries concerned by the trial months | 0 |
E.8.9.2 | In all countries concerned by the trial days | 0 |