| E.1 Medical condition or disease under investigation |
| E.1.1 | Medical condition(s) being investigated |
|
| E.1.1.1 | Medical condition in easily understood language |
|
| 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 | 20.0 |
| E.1.2 | Level | PT |
| E.1.2 | Classification code | 10049933 |
| E.1.2 | Term | Hypophosphatasia |
| 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 assess the long-term tolerability of subcutaneous (SC) asfotase alfa
To assess the proportion of asfotase alfa-treated patients showing radiographic change in the skeletal manifestations of HPP |
|
| E.2.2 | Secondary objectives of the trial |
To evaluate the long-term pharmacokinetics (PK) of SC asfotase alfa
To evaluate the effect of SC asfotase alfa on reduction in plasma inorganic pyrophosphate (PPi) and plasma pyridoxal-5’-phosphate (PLP)
|
|
| E.2.3 | Trial contains a sub-study | No |
| E.3 | Principal inclusion criteria |
Patients must meet all of the following criteria for enrollment in this study:
Compliant and satisfactory completion of Alexion-sponsored clinical trial ENB-006-09
Written informed consent by parent or other legal guardian) prior to any study procedures being performed
Parent or other legal guardian willing to comply with study requirements |
|
| E.4 | Principal exclusion criteria |
Patients will be excluded from enrollment in this study if they meet any of the following exclusion criteria:
Clinically significant disease that precludes study participation, in the Investigator’s opinion
Treatment with an investigational drug other than asfotase alfa
Prior treatment with bisphosphonates
Enrollment in any study (other than ENB-006-09) involving an investigational drug, device, or treatment
for HPP |
|
| E.5 End points |
| E.5.1 | Primary end point(s) |
- Long-term tolerability of subcutaneous (SC) asfotase alfa
- Proportion of asfotase alfa-treated patients showing radiographic change in the skeletal manifestations of HPP |
|
| E.5.1.1 | Timepoint(s) of evaluation of this end point |
|
| E.5.2 | Secondary end point(s) |
To evaluate the long-term pharmacokinetics (PK) of SC asfotase alfa
To evaluate the effect of SC asfotase alfa on reduction in plasma inorganic pyrophosphate (PPi) and plasma pyridoxal-5’-phosphate (PLP) |
|
| E.5.2.1 | Timepoint(s) of evaluation of this end point |
|
| 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) | No |
| E.7.4 | Therapeutic use (Phase IV) | No |
| E.8 Design of the trial |
| E.8.1 | Controlled | No |
| E.8.1.1 | Randomised | No |
| E.8.1.2 | Open | Yes |
| E.8.1.3 | Single blind | No |
| E.8.1.4 | Double blind | No |
| 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 | No |
| E.8.2.3 | Other | No |
| E.8.2.4 | Number of treatment arms in the trial | 1 |
| E.8.3 |
Will this trial be conducted at a single site globally?
| No |
| E.8.4 | Will this trial be conducted at multiple sites globally? | Yes |
| E.8.6 Trial involving sites outside the EEA |
| E.8.6.2 | Trial being conducted completely outside of the EEA | Yes |
| E.8.6.3 | Specify the countries outside of the EEA in which trial sites are planned |
|
| 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
|
|
| E.8.9 Initial estimate of the duration of the trial |
| E.8.9.2 | In all countries concerned by the trial years | 4 |
| 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 |