E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
Fabry disease (α-galactosidase A deficiency) |
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E.1.1.1 | Medical condition in easily understood language |
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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 | 10016016 |
E.1.2 | Term | Fabry's disease |
E.1.2 | System Organ Class | 10010331 - Congenital, familial and genetic disorders |
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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 evaluate the safety and efficacy of PRX-102 in patients with Fabry disease currently treated with agalsidase alfa |
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E.2.2 | Secondary objectives of the trial |
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E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
1. Age: 18-60 years
2. A documented diagnosis of Fabry disease.
3. Males: plasma and/or leucocyte alpha galactosidase activity (by activity assay) less than lower limit of normal according to laboratory range and one or more of the characteristic features of Fabry disease
i. Neuropathic pain
ii. Cornea verticillata
iii. Clustered angiokeratoma
4. Females: historical genetic test results consistent with Fabry mutations, or in the case of novel mutations a first degree male relative with Fabry disease, and one or more of the characteristic features of Fabry disease
i. Neuropathic pain
ii. Cornea verticillata
iii. Clustered angiokeratoma
5. Treatment with agalsidase alfa for at least 2 years and on a stable dose (>80% labelled dose/kg) for at least 6 months
6. eGFR ≥ 40 ml/min/1.73 m2 by CKD-EPI equation
7. Availability of at least 2 historical serum creatinine evaluations since starting agalsidase alfa treatment and not more than 2 years
8. Female patients and male patients whose co-partners are of child-bearing potential agree to use a medically acceptable method of contraception, not including the rhythm method
9. Subject signed an ICF before the start of protocol related activities. |
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E.4 | Principal exclusion criteria |
1. History of anaphylaxis or Type 1 hypersensitivity reaction to agalsidase alfa
2. Hypersensitivity to the active substance or to any of the excipients
(listed in section 7.2 )
3. History of renal dialysis or transplantation
4. History of acute kidney injury in the 12 months prior to screening, including specific kidney diseases (e.g., acute interstitial nephritis, acute glomerular and vasculitic renal diseases); non-specific conditions (e.g, ischemia, toxic injury); as well as extrarenal pathology (e.g., prerenal azotemia, and acute postrenal obstructive nephropathy)
5. Angiotensin converting enzyme (ACE) inhibitor or angiotensin receptor blocker (ARB) therapy initiated or dose changed in the 4 weeks prior to screening
6. Urine protein to creatinine ratio (UPCR) > 0.5 g/g and not treated with an ACE inhibitor or ARB
7. Known history of hypersensitivity to Gadolinium contrast agent that is not managed by the use of premedication
8. Females who are pregnant, planning to become pregnant during the study, or are breast feeding
9. Cardiovascular event (myocardial infarction, unstable angina) in the 6 month period before screening
10. Congestive heart failure NYHA Class IV
11. Cerebrovascular event (stroke, transient ischemic attack) in the 6 month period before screening
12. Presence of any medical, emotional, behavioral or psychological condition that, in the judgment of the Investigator and/or Medical Director, would interfere with the patient’s compliance with the requirements of the study
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E.5 End points |
E.5.1 | Primary end point(s) |
SAFETY ENDPOINTS:
Change from baseline in:
• Clinical laboratory tests
• Physical examination
• Assessment of the injection site
• Electrocardiogram
• Treatment-emergent adverse events
• Ability to taper off infusion premedication throughout the first 2 months of the study
• Requirement for use of premedication overall to manage infusion reactions
• Treatment-emergent anti-PRX-102 antibodies
EFFICACY ENDPOINTS:
• Mean annualised change in estimated glomerular filtration rate (eGFRCKD-EPI)
• Left Ventricular Mass Index (g/m2) preferably by MRI (echocardiogram can be used as an alternative)
• Plasma Lyso-Gb3
• Plasma Gb3
• Urine Lyso-Gb3
• Protein/Creatinine ratio spot urine test
• Frequency of pain medication use
• Exercise tolerance (Stress Test)
• Short Form Brief Pain Inventory (BPI)
• Mainz Severity Score Index (MSSI)
• Quality of life EQ-5D-5L |
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E.5.1.1 | Timepoint(s) of evaluation of this end point |
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E.5.2 | Secondary end point(s) |
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E.5.2.1 | Timepoint(s) of evaluation of this end point |
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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 | 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 |
The trial involves single site in the Member State concerned
| Yes |
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 | 1 |
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 |
Canada |
Germany |
Netherlands |
Norway |
Spain |
United Kingdom |
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E.8.7 | Trial has a data monitoring committee | No |
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 | 1 |
E.8.9.1 | In the Member State concerned months | 11 |
E.8.9.1 | In the Member State concerned days | 0 |
E.8.9.2 | In all countries concerned by the trial years | 1 |
E.8.9.2 | In all countries concerned by the trial months | 10 |
E.8.9.2 | In all countries concerned by the trial days | 0 |