E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
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E.1.1.1 | Medical condition in easily understood language |
Rett Syndrome is a rare genetic neurodevelopmental disorder related to a gene mutation. Males die before birth or in early infancy and Females suffer severe developmental regression and disability |
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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 | 20.0 |
E.1.2 | Level | PT |
E.1.2 | Classification code | 10077709 |
E.1.2 | Term | Rett syndrome |
E.1.2 | System Organ Class | 10010331 - Congenital, familial and genetic 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 |
The main objective of PART B will be to evaluate the safety, tolerability, and efficacy of ANAVEX2-73 in RTT, as well as to determine the most appropriate dose.
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E.2.2 | Secondary objectives of the trial |
Secondary outcome measures include a measure of the change or proposed improvement in daily functioning and the quality of life measures of participants with Rett Syndrome and the change or proposed improvement in caregiver burden
The following assessments will be completed at end of the 48 week Open Label Extension (OLE) treatment period:
1. Physical examination, including body weight, 2. Neurological examination 3. Vital signs measurement (heart rate, SBP and DBP, respiratory rate, oxygen saturation [pulse oximetry], and body temperature). 4. Safety laboratory assessments 5. Glutamate Plasma Concentration 6. GABA Plasma Concentration 7. RNA profiles (sample collection) 8. 12-Lead ECG 9. Adverse Events 10. Concurrent Medications, including supplements
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E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
1.Aged ≥ 18 years, inclusive. 2. Diagnosis of classic Rett Syndrome, according to 2010 criteria (Neul et al., 2010), and a MECP2 mutation. 3. Rett Syndrome Behaviour Questionnaire (RSBQ) total score ≥40. 4. Patients with a Clinical Global Impression – Severity (CGI-S) score of 4 or greater at Screening. 5. Current pharmacological treatment regimen, including supplements, has been stable for at least 4 weeks. 6. If on antiepileptic drugs (AEDs), 1-4 AEDs allowed. Treatment must be stable (drug, dose, interval of administration) for 30 days prior to enrollment. 7. If the subject is already receiving stable non-pharmacologic educational, behavioral, and/or dietary interventions, participation in these programs must have been continuous during the 90 days prior to the screening visit and subjects or their parent/caregiver/legally authorized representative (LAR) will not electively initiate new or modify ongoing interventions for the duration of the study. ‘Study duration’ is defined as lasting from the screening visit until the treatment is terminated. For participants in the 18-21 years range, typical school vacations are not considered modifications of stable programming. 8. Ability to keep accurate seizure diaries or have caregiver who can keep accurate seizure diaries. 9.If participant is a woman of childbearing potential, a negative urine or serum pregnancy test is required to confirm she is not pregnant. Female patients of childbearing potential are to use adequate contraception as recommended by their health care provider. For participants that are sexually active, highly effective contraception may be used as recommended by their health care provider.Highly effective methods of contraception may include: • Combined (estrogen and progestogen containing) hormonal contraception associated with inhibition of ovulation: Oral, intravaginal or transdermal • Progestogen-only hormonal contraception associated with inhibition of ovulation: Oral, injectable, implantable • Intrauterine device • Intrauterine hormone-releasing system • Bilateral tubal occlusion 10. Prior to the conduct of study-specific procedures, the subject’s parent/caregiver/LAR must provide written informed consent. If applicable, the research team must attempt to obtain consent from both parents.
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E.4 | Principal exclusion criteria |
1. Patients who have a progressive medical or neurological condition that in the opinion of the Investigator would interfere with the conduct of the study. 2. Patients with a current clinically significant systemic illness that is likely to result in deterioration of the patient’s condition or affect the patient’s safety during the study. 3. History of clinically evident stroke or clinically significant carotid or vertebrobasilar stenosis or plaque or other history of neurologic (e.g., head trauma with loss of consciousness) or psychiatric condition that the Investigator deems may interfere with interpretability of data. 4. Indication of liver disease, defined by serum levels of ALT (SGPT), AST (SGOT), or alkaline phosphatase above 3x upper limit of normal (ULN) as determined during screening. 5. Treatment with immunosuppressive medications (e.g., systemic corticosteroids) within the last 90 days (topical and nasal corticosteroids and inhaled corticosteroids for asthma are permitted) or chemotherapeutic agents for malignancy within the last 3 years. 6. Other clinically significant abnormality on physical, neurological, laboratory, or electrocardiogram (ECG) examination (e.g., atrial fibrillation) that could compromise the study or be detrimental to the participant. 7. Any known hypersensitivity to any of the excipients contained in the study drug or placebo formulation. 8. Other co-morbid or chronic illness beyond that known to be associated with Rett Syndrome. 9. Subjects who plan to initiate or change pharmacologic or nonpharmacologic intervention during the course of the study. 10. Subjects taking another investigational drug currently or within the last 30 days. 11. Any other criteria (such as a clinically significant screening blood test result), which in the opinion of the Investigator could interfere with the study conduct or outcome. 12. Treatment with strong inhibitors or inducers of CYP3A4 or CYP2C19 is not stable (drug, dose) for 30 days prior to screening. Although these medications are not excluded, caution is advised when enrolling participants on potent CYP3A4 or CYP2C19 inducers or inhibitors. 13. Patients with hepatic and renal impairment. |
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E.5 End points |
E.5.1 | Primary end point(s) |
Include safety and tolerability measures: • Physical and neurological examination. • Vital signs (heart rate, respiratory rate, systolic blood pressure [SBP], diastolic blood pressure [DBP], pulse oximetry, and oral body temperature). • Recording of adverse events (AEs). • 12-lead ECG; three consecutive ECGs where participants should be in a resting position for ≥5 minutes prior to each ECG evaluation. • Clinical laboratory tests • Concomitant medication log. • PK of ANAVEX2-73 and ANAVEX19-144.
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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) |
Efficacy: Include two clinical tests, which consist of change from baseline to end of treatment in the modified intent-to-treat (mITT) population in the: • RSBQ total score; and • the CGI-I score, with anchors specifically designed for RTT, at EOT, in the mITT population.
Safety and tolerability: The objective is to characterize the population PK of ANAVEX2-73 and its active metabolite, ANAVEX19-144, in patients with RTT. Details will be provided in the Pharmacometrics Analysis Plan (PAP).
AUC of ANAVEX2-73 and ANAVEX19-144 will be estimated using PK modeling approach.
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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 | Yes |
E.6.4 | Safety | Yes |
E.6.5 | Efficacy | Yes |
E.6.6 | Pharmacokinetic | Yes |
E.6.7 | Pharmacodynamic | Yes |
E.6.8 | Bioequivalence | No |
E.6.9 | Dose response | Yes |
E.6.10 | Pharmacogenetic | No |
E.6.11 | Pharmacogenomic | No |
E.6.12 | Pharmacoeconomic | No |
E.6.13 | Others | No |
E.6.13.1 | Other scope of the trial description |
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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 | No |
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
| No |
E.8.4 | The trial involves multiple sites in the Member State concerned | Yes |
E.8.4.1 | Number of sites anticipated in Member State concerned | 2 |
E.8.5 | The trial involves multiple Member States | No |
E.8.5.1 | Number of sites anticipated in the EEA | 0 |
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 |
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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 | 1 |
E.8.9.1 | In the Member State concerned months | 4 |
E.8.9.1 | In the Member State concerned days | 10 |
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 | 11 |
E.8.9.2 | In all countries concerned by the trial days | 20 |