E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
Long-term treatment of Hunter syndrome and cognitive impairment |
|
E.1.1.1 | Medical condition in easily understood language |
Hunter syndrome-Iduronate-2-Sulfatase enzyme deficiency |
|
E.1.1.2 | Therapeutic area | Body processes [G] - Genetic Phenomena [G05] |
MedDRA Classification |
E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 19.0 |
E.1.2 | Level | PT |
E.1.2 | Classification code | 10056889 |
E.1.2 | Term | Mucopolysaccharidosis II |
E.1.2 | System Organ Class | 10010331 - Congenital, familial and genetic disorders |
|
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 |
To determine the effect of the treatment regimen in pediatric patients with Hunter syndrome and early cognitive impairment on the General Conceptual Ability (GCA) score as measured by the Differential Ability Scale, Second Edition (DAS-II), in conjunction with Elaprase therapy |
|
E.2.2 | Secondary objectives of the trial |
Key secondary
To determine the effect of the treatment regimen in pediatric patients with Hunter syndrome and early cognitive impairment on the Adaptive Behavior Composite (ABC) score as measured by the Vineland Adaptive Behavior Scales, Second Edition (VABS-II), in conjunction with Elaprase therapy
Secondary
To determine the effect of the treatment regimen in pediatric patients with Hunter syndrome and early cognitive impairment, in conjunction with Elaprase therapy, on:
- Cognitive function as measured by the cluster areas and subtests of the DAS-II
- Adaptive behavior as measured by the domains of the VABS-II
For safety, device, PK/PD and health status see protocol section 2.4 - 2.6
|
|
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 |
A Controlled, Randomized, Two-arm, Open-label, Assessor-blinded, Multicenter Study of Intrathecal Idursulfase-IT Administered in Conjunction with Elaprase® in Pediatric Patients with Hunter Syndrome and Early Cognitive Impairment.
Protocol Amendment 2 of 16 December 2013.
The objective of the sub-study is:
To examine the effect of the treatment regimen on safety and efficacy measures in pediatric patients with Hunter syndrome and early cognitive impairment who are below 3 years of age |
|
E.3 | Principal inclusion criteria |
Inclusion Criteria for the Pivotal Study:
- The patient is male and is ≥3 and <18 years of age at the time of informed consent.
- The patient must have a documented diagnosis of MPS II. Of the three criteria below, the combinations (2a AND 2b) or (2a AND 2c) will be accepted as diagnostic of MPS II:
a. The patient has a deficiency in iduronate-2-sulfatase enzyme activity of ≤10% of the lower limit of the normal range as measured in plasma, fibroblasts, or leukocytes (based on the reference laboratory’s normal range).
AND
b.The patient has a documented mutation in the iduronate-2-sulfatase gene that leaves the FMR1 and FMR2 genes intact.
OR
c.The patient has a normal enzyme activity level of one other sulfatase as measured in plasma, fibroblasts, or leukocytes (based on the normal range of measuring laboratory).
- The patient has evidence at Screening of Hunter syndrome-related cognitive impairment, defined as follows:
A patient who is ≥3 and <13 years of age must have one of the following criteria (3a OR 3b):
a. A GCA score ≥55 and ≤85
OR
b. If the patient has a GCA score at Screening >85, there must be evidence of a decrease in GCA score of ≥10 points over 12 months from a previously documented test result in observational study HGT-HIT-090.
A patient who is ≥13 and <18 years of age must have both of the following criteria (3c AND 3d):
a. A GCA score of ≥55 and ≤85.
AND
b. There must be evidence of a decrease in GCA score of ≥10 points over 12 months from a previously documented test result in observational study HGT-HIT-090.
- The patient has received and tolerated a minimum of 4 months of therapy with Elaprase during the period immediately prior to Screening.
- The patient must have sufficient auditory capacity, with a hearing aid(s), if needed, in the Investigator’s judgment to complete the required protocol testing and must be compliant with wearing the hearing aid(s), if needed, on scheduled testing days.
Inclusion criteria for the sub-study:
- The patient is male and is <3 years of age at the time of informed consent.
- The patient must have a documented diagnosis of MPS II. Of the three criteria below, the combinations (2a AND 2b) or (2a AND 2c) will be accepted as diagnostic of MPS II:
a. The patient has a deficiency in iduronate-2-sulfatase enzyme activity of ≤10% of the lower limit of the normal range as measured in plasma, fibroblasts, or leukocytes (based on the reference laboratory’s normal range).
AND
b. The patient has a documented mutation in the iduronate-2-sulfatase gene that leaves the FMR1 and FMR2 genes intact.
OR
c. The patient has a normal enzyme activity level of one other sulfatase as measured in plasma, fibroblasts, or leukocytes (based on the normal range of measuring laboratory).
- The patient has evidence at Screening of Hunter syndrome-related cognitive impairment as assessed using the BSID-III and defined as a composite score on the cognitive scale ≥55 and ≤85.
- The patient has received and tolerated a minimum of 4 months of therapy with Elaprase during the period immediately prior to Screening.
- The patient must have sufficient auditory capacity, with a hearing aid(s), if needed, in the Investigator’s judgment to complete the required protocol testing and must be compliant with wearing the hearing aid(s), if needed, on scheduled testing days.
|
|
E.4 | Principal exclusion criteria |
- The patient has clinically significant non-Hunter syndrome-related CNS involvement (such as Fragile-X syndrome) which is judged by the Investigator to be likely to interfere with the accurate administration and interpretation of protocol assessments.
- The patient has a large chromosomal deletion or complex rearrangement that includes a deletion of the FMR1 and/or FMR2 genes.
- The patient has a significant medical or psychiatric comorbidity(ies) that might affect study data or confound the integrity of study results.
- The patient has contra-indications for performance of lumbar puncture such as musculoskeletal/spinal abnormalities or risk of abnormal bleeding.
- The patient has a history of complications from previous lumbar punctures or technical challenges in conducting lumbar punctures such that the potential risks would exceed possible benefits for the patient.
- The patient has an opening CSF pressure upon lumbar puncture that exceeds 30.0 cm H2O.
- The patient has experienced infusion-related anaphylactoid event(s) or has evidence of consistent severe adverse events related to treatment with Elaprase which, in the Investigator’s opinion, may pose an unnecessary risk to the patient.
- The patient has received a cord blood or bone marrow transplant at any time or has received blood product transfusions within 90 days prior to Screening.
- The patient has a history of poorly controlled seizure disorder.
- The patient is unable to comply with the protocol (eg, has significant hearing or vision impairment, a clinically relevant medical condition making implementation of the protocol difficult, unstable social situation, known clinically significant psychiatric/behavioral instability, is unable to return for safety evaluations, or is otherwise unlikely to complete the study), as determined by the Investigator.
- The patient is enrolled in another clinical study that involves clinical investigation or use of any investigational product (drug or [intrathecal/spinal] device) within 30 days prior to study enrollment or at any time during the study.
- The patient has any known or suspected hypersensitivity to anesthesia or is thought to be at an unacceptably high risk for anesthesia due to compromised airways or other conditions.
- The patient has a condition that is contraindicated as described in the SOPH-A-PORT Mini S IDDD Instructions for Use (IFU), including:
a. The patient has had, or may have, an allergic reaction to the materials of construction of the SOPH-A-PORT Mini S device
b. The patient’s body size is too small to support the size of the SOPH-A-PORT Mini S Access Port, as judged by the Investigator
c. The patient’s drug therapy requires substances known to be incompatible with the materials of construction
d. The patient has a known or suspected local or general infection
e. The patient is at risk of abnormal bleeding due to a medical condition or therapy
f. The patient has one or more spinal abnormalities that could complicate safe implantation or fixation
g. The patient has a functioning CSF shunt device
h. The patient has shown an intolerance to an implanted device
|
|
E.5 End points |
E.5.1 | Primary end point(s) |
Change from baseline in the GCA score after 12 months of treatment, at Visit Week 52, as obtained by DAS-II testing |
|
E.5.1.1 | Timepoint(s) of evaluation of this end point |
Screening, Weeks 16, 28, 40 and 52 |
|
E.5.2 | Secondary end point(s) |
- Change from baseline in the adaptive behavior composite (ABC) score after 12 months of treatment at Visit Week 52, as obtained by VABS-II testing
- Change from baseline to Visit Weeks 16, 28, and 40 in the GCA score as obtained by DAS-II testing
- Change from baseline to Visit Weeks 16, 28, and 40 in the ABC score as obtained by VABS-II testing
- Change from baseline to Visit Weeks 16, 28, 40, and 52 in standard scores in cluster areas of the DAS-II: Verbal, Nonverbal, Spatial, and Special Nonverbal Composite (SNC)
- Change from baseline to Visit Weeks 16, 28, 40, and 52 in standard scores of the VABSII domains: Communication, Daily Living Skills, Socialization, and Motor Skills
- Change from baseline to Visit Weeks 16, 28, 40, and 52 in age equivalents, developmental quotients, and T-scores for the subtests of the DAS-II: Verbal Comprehension, Picture Similarities, Naming Vocabulary, Pattern Construction, Matrices, and Copying for the DAS-II/Early Years and Recall of Designs, Word Definitions, Pattern Construction, Matrices, Verbal Similarities, and Sequential and Quantitative Reasoning for the DAS-II/School Years
- Change from baseline to Visit Weeks 16, 28, 40, and 52 in age equivalents, developmental quotients, and V-scale scores of the VABS-II subdomains: Communication (Receptive, Expressive, Written), Daily Living Skills (Personal, Domestic, Community), Socialization (Interpersonal Relationships, Play and Leisure Time, Coping Skills), Motor Skills (Gross, Fine)
- Change from baseline to Visit Weeks 16, 28, 40, and 52 in the V-scale scores and observed maladaptive levels of the VABS-II Maladaptive Behavior Index and its subscales (Internalizing, Externalizing)
Pharmacokinetic and Pharmacodynamic Endpoints:
- Serum concentration of idursulfase and serum PK parameters after IT administration
- CSF concentration of idursulfase prior to each monthly IT administration
- Change from baseline in the concentration of GAG in CSF
Safety Assessments:
Safety will be assessed during the study by collection of adverse events (by type, severity, and relationship to treatment [idursulfase-IT, the IDDD, device surgical procedure, or IT administration process] and IV Elaprase infusion), changes in clinical laboratory testing (serum chemistry, hematology, urinalysis), physical and neurological examination, vital signs, 12-lead ECG recordings, CSF laboratory parameters (chemistries, cell counts), anti-idursulfase antibodies in CSF and serum, and determination of antibodies having enzyme neutralizing activity.
SOPH-A-PORT Mini S Device Assessments:
SOPH-A-PORT Mini S assessments will include measures of device implantation, device function, device longevity, record of revisions, removals, and replacements of the implanted IDDD, and adverse events associated with the device. This data will be collected on the patient’s case report form (CRF) from the time of implantation and continue throughout the study as long as the SOPH-A-PORT Mini S remains implanted.
- Health Status Assessment
Health status dimensions as obtained by the EQ-5D questionnaire.
|
|
E.5.2.1 | Timepoint(s) of evaluation of this end point |
Neurodevelopment assessments: Screening, Weeks 16, 28, 40 and 52
For all other endpoints please refer to Appendix 1, 2 and 3 of the protocol. |
|
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 | 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 | 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) | 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 | Yes |
E.8.1.4 | Double blind | No |
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 |
Patients are assigned randomly to participate without receiving IT treatment |
|
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 |
Argentina |
Australia |
France |
Germany |
Mexico |
Spain |
United Kingdom |
United States |
|
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
|
The study will conclude after the last patient has completed his last visit. |
|
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 |