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 |
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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 | 21.0 |
E.1.2 | Level | LLT |
E.1.2 | Classification code | 10064124 |
E.1.2 | Term | Cervical dystonia |
E.1.2 | System Organ Class | 100000004859 |
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E.1.3 | Condition being studied is a rare disease | No |
E.2 Objective of the trial |
E.2.1 | Main objective of the trial |
To compare the efficacy of a high and low dose of DAXI for injection (250 U; 125 U) relative to placebo, and to each other, in adults with moderate to severe, isolated CD |
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E.2.2 | Secondary objectives of the trial |
- To establish duration of effect for DAXI for injection - To assess safety and immunogenicity of DAXI for injection |
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E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
1. Adults, 18 to 80 years of age 2. Meets diagnostic criteria for isolated CD (idiopathic; dystonic symptoms localized to the head, neck, shoulder areas) with at least moderate severity at Baseline (Day 1), defined as a TWSTRS-total score of at least 20, with at least 15 on the TWSTRS-Severity subscale, at least 3 on the TWSTRS-Disability subscale, and at least 1 on the TWSTRS-Pain subscale 3. Written informed consent including authorization to release health information |
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E.4 | Principal exclusion criteria |
1. Cervical dystonia attributable to an underlying etiology, (e.g., traumatic torticollis or tardive torticollis) 2. Predominant retrocollis or anterocollis CD 3. Significant dystonia in other body areas, or is currently being treated with BoNT for dystonia in areas other than those associated with isolated CD 4. Severe dysphagia (Grade 3 or 4 on the Dysphagia Severity Scale) at Screening or Baseline (prior to study treatment) 5. Any neuromuscular neurological conditions that may place the subject at increased risk of morbidity with exposure to BoNT, including peripheral motor neuropathic diseases (e.g., amyotrophic lateral sclerosis and motor neuropathy, and neuromuscular junctional disorders such as Lambert-Eaton syndrome and myasthenia gravis) 6. Previous treatment with any BoNT product for any condition within the 14 weeks prior to Screening 7. Botulinum neurotoxin treatment-experienced subjects who have historically required <100 U of Botox or its equivalent to effectively treat their CD symptoms 8. Botulinum neurotoxin treatment-experienced subjects who had suboptimal or no treatment response to the most recent BoNTA injection for CD, as determined by the investigator, or history of primary or secondary non-response to BoNTA injections, known to have neutralizing antibodies to BoNTA, or have a history of botulinum toxin type B (rimabotulinumtoxinB; [Myobloc/Neurobloc]) injection for CD due to non-response or suboptimal response to BoNTA 9. Use of deep brain stimulation, or intrathecal baclofen for dystonia 10. Subjects on oral medications for focal dystonia (e.g., anticholinergics, muscle relaxants, benzodiazepines, dopamine depleter) or neuroleptics for psychiatric conditions (e.g., risperidone, olanzapine, clozapine, quetiapine), who have not been stable on their regimen for at least 4 weeks prior to Screening 11. Neurological abnormalities in the neck other than CD 12. Previous neck surgery, phenol injection to the neck muscles, myotomy or denervation surgery in the neck/shoulder region (e.g., peripheral denervation, spinal cord stimulation) 13. Profound atrophy of cervical musculature, or cervical contractures or cervical spinal deformity leading to marked limitation on passive range of motion 14. Use of aminoglycoside antibiotics, polymyxins, lincosamides, (e.g., clindamycin), or other agents that might interfere with neuromuscular transmission (e.g., curare-like drugs, quinidine, magnesium sulfate, anticholinesterases, succinylcholine chloride) within 14 days prior to Screening 15. Women of child bearing potential (WOCBP), who have a positive pregnancy test at Screening, or do not agree to use an effective method of birth control during the course of the study 16. Female, who is pregnant or nursing (lactating) 17. Screening 12-lead ECG with exclusionary conduction criteria of corrected QT interval (using Fridericia's correction formula): QTcF interval > 450 msec (males) or > 470 msec (females), heart block (i.e, second degree AV block Mobitz Type 2, third degree AV block or complete heart block), or ventricular tachycardia 18. History of severe (stage 3) chronic obstructive pulmonary disease, or unstable pulmonary disease within 30 days prior to Screening 19. History of chronic or recurrent hypokalemia, or serum potassium < 2.5 mEq/L or mmol/L on chemistry at Screening 20. History of congestive heart failure, (New York Heart Association Class III or IV), Torsade de Pointe (TdP), and/or Long QT Syndrome, 21. Participants in an investigational drug or device study within the last 30 days prior to Screening 22. Active skin infections at the injection sites which would put the subject at increased risk of morbidity with BoNT injections 23. Presence of any blood coagulation disorder, or on anticoagulation treatment with international normalized ratio (INR) > 3.5 24. Any acute illnesses or medical conditions including cognitive impairment (e.g., dementia), significant psychiatric illnesses (e.g., major depressive or bipolar disorder) or symptoms (e.g., suicidal ideation, psychosis) that are not stable, and in the investigator’s opinion, could put the subject at increased risk of morbidity, confound the study results, or interfere significantly with the subject’s participation in the study |
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E.5 End points |
E.5.1 | Primary end point(s) |
The average of the change from baseline in TWSTRS-total score at Weeks 4 and 6. |
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E.5.1.1 | Timepoint(s) of evaluation of this end point |
It will be assessed at weeks 4 and 6 |
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E.5.2 | Secondary end point(s) |
• Change from baseline in TWSTRS-total score (all post-treatment timepoints) • Duration of effect, defined as time (number of weeks) from treatment to loss of at least 80% of the peak treatment effect achieved at Weeks 4 and 6 (i.e., the target TWSTRS score) • Percentage of subjects with at least “moderate” (a 2-point) improvement on CGIC at Week 4 or 6 • Percentage of subjects with at least “moderate” (a 2-point) improvement on PGIC at Week 4 or 6 • Safety, which includes adverse events (AEs), presence of serum neutralizing antibodies to BoNTA and novel excipient RTP004, hematology, serum chemistry, urinalysis, ECG, vital signs, physical and neurologic examinations, and clinically significant changes in pulmonary function by spirometry (FEV1 / FVC) |
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E.5.2.1 | Timepoint(s) of evaluation of this end point |
It will be assessed at Week 6. |
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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 | 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 | 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
| 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 | 36 |
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 |
Austria |
Canada |
Czech Republic |
France |
Germany |
Hungary |
Italy |
Poland |
Spain |
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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The end of study is defined as LVLS or procedure (EU and non EU). |
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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 | |
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 | 4 |