E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
Neurologic Manifestations of Niemann-Pick Type C1 (NPC1) Disease |
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E.1.1.1 | Medical condition in easily understood language |
Niemann-Pick Type C1 (NPC1) Disease |
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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 |
Study Part A: The primary study objective was to select the dose of VTS-270 to be used in Study Part B and Part C. Dose selection criteria included safety and tolerability including a thorough audiologic evaluation. Preliminary efficacy data was provided to the Dose Selection Committee (DSC) to assist, if necessary, in dose selection.
Study Part B: The primary study objective was to evaluate, in a double-blind sham-controlled design, the progression of the neurologic manifestations of NPC1 disease following 52 weeks of treatment for subjects treated with VTS-270 compared to sham control, using the following assessments: •The Neimann Pick Type C Severity Scale (NPC-SS) composite which consists of the sum of 4 components of the NPC-SS: ambulation, fine motor, cognition, and swallowing. •The blinded Clinician-Clinical-Global Impression of Change (CGIC)
Study Part C: The primary study objective is to evaluate the long-term safety, tolerability, and efficacy of VTS 270. |
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E.2.2 | Secondary objectives of the trial |
Study Part A: There were no secondary objectives.
Study Part B: The secondary objectives were divided into 2 categories: Key Secondary Objectives and Other Secondary Objectives. The key secondary objective for Study Part B was to evaluate the progression of the neurologic manifestations of NPC1 disease using the total NPC-SS score, excluding the hearing domain and auditory brainstem response (ABR) modifier results, following 52 weeks of treatment for subjects treated with VTS-270 compared to sham controls and the Caregiver CGIC.
Study Part C: The secondary study objectives are to: 1. Assess the safety and tolerability of the B. Braun Celsite Spinal Access Port utilized to administer VTS-270 (device safety and tolerability substudy). 2. Assess the plasma and cerebrospinal fluid (CSF) PK of VTS-270 concentrations in subjects receiving the 900 mg dose of VTS-270 via the B. Braun Celsite Spinal Access Port (device PK substudy). |
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E.2.3 | Trial contains a sub-study | Yes |
E.2.3.1 | Full title, date and version of each sub-study and their related objectives |
(1)Part C European Site-Specific Device Safety and Tolerability Substudy and (2) European Site-Specific Device PK Substudy. The both sub-studies are included into the main Protocol v11.0 dated 24-Aug-2018.
Objectives for substudy (1): Assess the safety and tolerability of the B. Braun Celsite Spinal Access Port utilized to administer VTS-270 in approximately 6 subjects who are currently enrolled in VTS301 Part C.
Objectives for substudy (2): Assess the plasma and CSF PK of VTS-270 and trough HP-β-CD concentration in subjects receiving the 900 mg dose of VTS-270 via the B. Braun Celsite Spinal Access Port. |
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E.3 | Principal inclusion criteria |
Study Parts A and B – not applicable as Part A and B are completed. Study Part C – NO NEW SUBJECTS ARE ALLOWED TO ENTER THE STUDY AS OF 20 JANUARY 2021 Inclusion Criteria: 1. Subject has completed Study Part B, meets the criteria for dose reduction for a second time or meets the criteria for the rescue option OR 2. Subject is a current participant in the NIH phase 1/2a open-label study and: a. Subject agrees to convert from the dose of VTS-270 currently receiving as a subject in the NIH phase 1/2a protocol to the dose chosen for Parts B and C of this study, 900 mg. b. Subject agrees to convert from the monthly dosing regimen used in the NIH phase 1/2a protocol to an every 2-week dosing regimen. c. In instances where NIH phase 1/2a subjects eligible to enroll into Study Part C are unable to convert from their current NIH phase 1/2a dose or monthly regimen, the investigator must receive prior written authorization from the sponsor for the subject to enter Part C of the study on an amended dose and/or regimen. OR 3. Subject has received prior written authorization from Vtesse to enroll directly into Study Part C. 4. Females of childbearing potential (not surgically sterile) must use a medically acceptable method of contraception and must agree to continue use of this method for the duration of the study and for 30 days after participation in the study. Acceptable methods of contraception include barrier method with spermicide, intrauterine device, steroidal contraceptive in conjunction with a barrier method, abstinence, or same-sex partner. 5. Subject or parent/guardian must provide written informed consent to participate in the study. In addition to parental consent, assent to participate must also be sought from minor children.
Subject Inclusion Criteria for European Site-specific Device Safety and Tolerability Substudy – Not applicable – enrollment in the Device Substudy concluded Aug 2018.
Subject Inclusion Criteria for the European Site-specific Device Pharmacokinetic (PK) Substudy – Not applicable – no subject consented to participate in the PK Substudy. |
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E.4 | Principal exclusion criteria |
Study Parts A and B – not applicable as Part A and B are completed. Study Part C – NO NEW SUBJECTS ARE ALLOWED TO ENTER THE STUDY AS OF 20 JANUARY 2021
Subject Exclusion Criteria for the European Site-specific Device Safety and Tolerability Substudy – Not applicable - enrollment in the Device Substudy concluded Aug 2018. |
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E.5 End points |
E.5.1 | Primary end point(s) |
Study Part A/B is complete. Study Part C: as of 20 January 2021 no efficacy analyses will be performed. - The change from baseline to each assessment in a composite outcome that is the sum of the ambulation, cognition, fine motor, and swallowing components of the NPC-SS. - The change from baseline to each assessment in total NPC-SS with the hearing domain and auditory brainstem response (ABR) modifiers removed. - Proportion of responders (defined as no change or improvement on NPC-SS total score with hearing domain and ABR modifiers removed) at each assessment. - Proportion of Blinded Clinician-Clinical Global Impression of Change (CGIC) (defined as a score of no change, minimally improved, moderately improved, or markedly improved) at each assessment compared to baseline. - Summary of AEs, concomitant medications, physical examinations, audiologic examination, and clinical laboratories. - Change from baseline in the EQ-5D-3L questionnaire at each assessment. - Change from baseline to each assessment in each of the 9 clinical domains of the NPC-SS. - Change from baseline to each assessment in the total NPC-SS with hearing domain and ABR modifier included. - Time to one 1-point increase (worsening) in NPC-SS composite score. - The composite NPC-SS mean annualized rate of change (slope) from baseline to each assessment |
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E.5.1.1 | Timepoint(s) of evaluation of this end point |
Study Part C: Treatment with VTS-270 should be discontinued as soon as possible; it will be permitted for up to an additional 9 months (20 October 2021), in consideration of the need to determine a transition plan. The potential extension of treatment is contingent upon re-consent of the subject and approval by their applicable EC and health authority. After 21 June 2021, subjects may continue to receive IT adrabetadex, only in case: -they appear to be benefiting from treatment based on investigator’s assessment, AND -they are aware of the risks associated with adrabetadex, including hearing loss, and understand that no significant differences were seen between patients treated with adrabetadex and sham-treated patients on any efficacy measures in this randomized, controlled trial.
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E.5.2 | Secondary end point(s) |
Study Part A/B: Not applicable as these analyses are complete.
Study Part C: After 20 January 2021, efficacy endpoints for Study Part C will not be reported. • The change from baseline to each assessment in a composite outcome that is the sum of the ambulation, cognition, fine motor, and swallowing components of the NPC-SS • The change from baseline to each assessment in total NPC-SS with the hearing domain and ABR modifiers removed • Proportion of responders (defined as no change or improvement on NPC-SS total score with hearing domain and ABR modifiers removed) at each assessment • Proportion of Blinded Clinician-CGIC responders (defined as a score of no change, minimally improved, moderately improved, or markedly improved) at each assessment compared to baseline • Summary of AEs, concomitant medications, physical examinations, audiologic examination, and clinical laboratories • Change from baseline in the EQ-5D-3L questionnaire at each assessment • Change from baseline to each assessment in each of the 9 clinical domains of the NPC-SS • Change from baseline to each assessment in the total NPC-SS with hearing domain and ABR modifier included • Time to one point increase (worsening) in NPC-SS composite score • The composite NPC-SS mean annualized rate of change (slope) from baseline to each assessment |
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E.5.2.1 | Timepoint(s) of evaluation of this end point |
Study Part C: Treatment with VTS-270 should be discontinued as soon as possible; it will be permitted for up to an additional 9 months (20 October 2021), in consideration of the need to determine a transition plan. The potential extension of treatment is contingent upon re-consent of the subject and approval by their applicable EC and health authority. After 21 June 2021, subjects may continue to receive IT adrabetadex, only in case: -they appear to be benefiting from treatment based on investigator’s assessment, AND -they are aware of the risks associated with adrabetadex, including hearing loss, and understand that no significant differences were seen between patients treated with adrabetadex and sham-treated patients on any efficacy measures in this randomized, controlled trial. |
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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 | Yes |
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 | Yes |
E.6.13.1 | Other scope of the trial description |
Study Part C (Substudy): Safety and tolerability of the B. Braun Celsite Access Port System and Pharmacokinetics-Substudy |
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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) | 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 | No |
E.8.2.3 | Other | Yes |
E.8.2.3.1 | Comparator description |
Study Parts A and B of the trial are sham-controlled. Study Part C is open labelled. |
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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 | 3 |
E.8.5 | The trial involves multiple Member States | Yes |
E.8.5.1 | Number of sites anticipated in the EEA | 9 |
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 |
Australia |
Turkey |
United States |
France |
Germany |
Italy |
Spain |
Switzerland |
United Kingdom |
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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 | 6 |
E.8.9.1 | In the Member State concerned months | 0 |
E.8.9.1 | In the Member State concerned days | |
E.8.9.2 | In all countries concerned by the trial years | 6 |
E.8.9.2 | In all countries concerned by the trial months | 0 |