E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
Cerebellar ataxia is a form of ataxia originating in the cerebellum and is most often caused by neurodegenerative disorders of the cerebellum, either hereditary or sporadic. The leading clinical symptoms of cerebellar ataxia are disturbances of stance/gait (> 85%) with recurrent falls, limb ataxia with severe functional impairment of arm and hand movements, dysarthrophonia with impaired oral communication abilities and ocular motor disturbances with impaired vision. |
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E.1.1.1 | Medical condition in easily understood language |
Cerbellar ataxia is a neurodegenerative neurological disorder characterized by disturbances of gait, imbalance, speech and motor skills |
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E.1.1.2 | Therapeutic area | Diseases [C] - Nervous System Diseases [C10] |
MedDRA Classification |
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 primary aim of the ALCAT trial is to determine the effect of Acetyl-DL-Leucine compared to placebo intervention on improving motor function measured by the total score of the Scale for the Assessment and Rating of Ataxia (SARA). |
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E.2.2 | Secondary objectives of the trial |
To demonstrate that Acetyl-DL-Leucine is efficacious in 1. improving motor function measured by the Spinocerebellar Ataxia Functional Index (SCAFI) and SARA subscore items 2. improving quality of life (EQ-5D-5L) as well as depression (Beck Depression Inventory, BDI-II) and fatigue (Fatigue Severity Score, FSS) 3. to check for the occurrence of adverse effects of the trial drug. 4. improving gait patterns measured by gait analysis (examination will be perfomed in the sub group of patients being enrolled in the trial center DSGZ)
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E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
Subjects will only be included in the study if they meet all of the following criteria: 1) Clinically confirmed cerebellar ataxia (CA) with a total SARA-Score ≥ 3 (range 0-40) of hereditary or non-hereditary degenerative type 2) Patient did not receive any of the following prohibited medication within 4 weeks prior to randomization: aminopyridines, Acetyl-DL-Leucine, Riluzole, Gabapentin, Varenicline, Chlorzoxazone 3) The ability to follow study instructions and likely to attend and complete all required visits 4) Written informed consent of the subject prior to any study specific intervention 5) Age ≥ 18 years
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E.4 | Principal exclusion criteria |
Subjects will not be included in the study if any of the following criteria applies: 1) Subject is not able to give consent 2) Onset of ataxia in association with stroke, encephalitis, sepsis, hyperthermia or heat stroke 3) Toxic causes for ataxia of cerebellar type 4) Rapid progression of ataxia (development of severe ataxia in less than 12 weeks) 5) Subject suffers from any of the following: o chronic diarrhea o unexplained visual loss o malignancies o insulin-dependent diabetes mellitus 6) Ataxia due to multiple sclerosis, ischemia, hemorrhage or tumor of the posterior fossa as confirmed by imaging 7) Ataxia due to clinical likely multisystem atrophy type C (MSA-C) 8) Diagnosis of clinical likely Friedreich ataxia 9) Known history of hypersensitivity to the investigational drug or derivates 10) Liver failure defined as AST/ALT > 300 U/l 11) Simultaneous participation in another clinical trial or participation in any clinical trial involving administration of an investigational medical product within 30 days prior to the beginning of the clinical trial 12) Subjects with a physical or psychiatric condition which at the investigator’s discretion may put the subject at risk, may confound the trial results, or may interfere with the subject’s participation in this clinical trial 13) Known or persistent abuse of medication, drugs or alcohol 14) Females of childbearing potential, who are not using and not willing to use medically reliable methods of contraception for the entire study duration as listed in the patient informed consent form 15) Current or planned pregnancy or nursing women 16) Patient has received any of the following prohibited medication within 4 weeks prior to randomization o Aminopyridines (including substained-release form) o Acetyl-DL-Leucine o Riluzole o Gabapentin o Varenicline o Chlorzoxazone
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E.5 End points |
E.5.1 | Primary end point(s) |
Primary efficacy endpoint: The primary efficacy endpoint is defined as the absolute changes in SARA total score from period-level baseline to week 2 after start of treatment start and to the end of the 6-weeks treatment period, i.e. the difference between post-treatment values and the corresponding period-level baseline values:
Delta (SARAtotal) = SARAtotal (post-treatment) – SARAtotal (period baseline)
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E.5.1.1 | Timepoint(s) of evaluation of this end point |
after 2 and 6 weeks of treatment with IMP (for each treatment period) |
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E.5.2 | Secondary end point(s) |
Key secondary endpoint(s): SCAFI and subscores of SARA, QoL (EQ-5D-5L), depression (BDI-II), fatigue (FSS)
Assessment of safety: Documentation and reporting of side effects (AEs, SAEs, SUSARs)
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E.5.2.1 | Timepoint(s) of evaluation of this end point |
6 weeks of treatment with IMP (for each treatment period) as well as in follow-up 4 weeks after taking the last IMP. Absolute changes at the end of the 6-week treatment period compared to the period-level baseline defined as score at visit 2 (treatment period 1) and at visit 5 (treatment period 2) as well as 4 weeks after taking the last IMP (follow-up).
Absolute changes in the coefficient of variation gait parameter of gait analysis (examination will be perfomed in the sub group of patients being enrolled in the trial center DSGZ). |
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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 | No |
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) | No |
E.7.3 | Therapeutic confirmatory (Phase III) | Yes |
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 | Yes |
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 | 6 |
E.8.5 | The trial involves multiple Member States | Yes |
E.8.5.1 | Number of sites anticipated in the EEA | 7 |
E.8.6 Trial involving sites outside the EEA |
E.8.6.1 | Trial being conducted both within and outside the EEA | No |
E.8.6.2 | Trial being conducted completely outside of the EEA | No |
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 | 8 |
E.8.9.1 | In the Member State concerned days | |
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 | 8 |