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 |
Fabry disease is an inherited condition caused by a deficiency of an enzyme, leading to a range of systemic symptoms (potentially life-threatening), such as kidney failure, heart attacks and strokes. |
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E.1.1.2 | Therapeutic area | Diseases [C] - Nutritional and Metabolic Diseases [C18] |
MedDRA Classification |
E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 18.0 |
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 ongoing safety and tolerability of PRX-102 in adult Fabry patients who have successfully completed treatment with PRX-102 in the PB-102-F01 study and its first extension PB-102-F02.
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E.2.2 | Secondary objectives of the trial |
All exploratory efficacy endpoints that were evaluated during the PB-102-F01 study and its first extension (PB-102-F02) will continue to be assessed in this second extension study PB-102-F03. These include:
- Globotriaosylceramide (Gb3) concentration in kidney (assessed histologically in kidney biopsy). - Gb3 concentration in skin (assessed histologically in skin punch biopsy) - Gb3 concentrations in plasma and urine sediment - Globotriaosylsphingosine (Lyso-Gb3) concentration in plasma - Assessment of gastrointestinal symptoms - Kidney functions (eGFR and proteinuria) - Short Form Brief Pain Inventory (BPI) - Left ventricular mass (LVM) and myocardial fibrosis assessment by cardiac MRI - Cardiac function assessment by echocardiography and stress test - Cerebrovascular disease assessment (clinical and MRI evaluation) - Mainz Severity Score Index (MSSI)
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E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
Eligible patients must fulfill the following inclusion criteria: 1. Completion of study PB-102-F02 2. The patient signs informed consent 3. Female patients and male patients whose co-partners are of child-bearing potential must agree to use a medically acceptable method of contraception, not including the rhythm method. Acceptable methods of contraception include hormonal products, intrauterine device, or male or female condoms. Contraception should be used for 1 month after termination of treatment.
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E.4 | Principal exclusion criteria |
The presence of any of the following excludes a patient from study enrollment: 1. Pregnant or nursing 2. 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) |
The main outcome will be evaluation of safety in PRX-102 treated subjects at each dose. Safety will be assessed by the frequency, severity, and duration of treatment-emergent adverse events (TEAEs), including clinically significant laboratory abnormalities, ECG changes from baseline, physical examination findings and assessment of the injection site reactions after administration of the study drug. Also Anti-PRX-102 antibodies will be assessed.
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E.5.1.1 | Timepoint(s) of evaluation of this end point |
- Clinical lab tests and physical examination will be assessed at screening and then every 3 months for 24 months. - ECG will be performed every 6 months, and visit 53(month 24). - Vital Signs, adverse events and injection site reactions will be assessed at every visit. - Vital signs will be assessed at the screening visit and visit 1 up to visit 53. - Anti-PRX-102 antibodies will be assessed at Screening, visit 5 (month 2), visit 7 (month 3), visit 14 (month 6), visit 20 (month 9), visit 27 (month 12), visit 33 (month 15), visit 40 (mnonth 18), visit 46 (month 21), visit 53 (month 24) and 3 months after last infusion.
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E.5.2 | Secondary end point(s) |
The following efficacy endpoints evaluated in Study PB-102-F02 will continue to be measured in this extension study. Baseline values for this extension study will be the values from the last infusion of study PB-102-F02.
- Gb3 concentrations in plasma and urine sediment - Globotriaosylsphingosine (Lyso-Gb3) concentration in plasma - Assessment of gastrointestinal symptoms - Kidney functions (eGFR and proteinuria) - Short Form Brief Pain Inventory (BPI) - Gb3 concentration in kidney (assessed histologically in kidney biopsy samples) - Gb3 concentration in skin (assessed histologically in skin biopsy samples) - Left ventricular mass and myocardial fibrosis assessment by cardiac MRI - Cardiac function (assessed by echocardiography) and stress test - Cerebrovascular disease (clinical and MRI evaluation) - Mainz Severity Score Index (MSSI)
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E.5.2.1 | Timepoint(s) of evaluation of this end point |
- Gb3 (plasma & urine) at baseline and every 3 months during the study - Lyso-Gb3 concentration at baseline and every 3 months during the study - Assessment of gastrointestinal symptoms at baseline and every 3 months during the study - eGFR and proteinuria at baseline and every 3 months during the study - BPI at baseline and every 3 months during the study - Gb3 (kidney and skin) at last visit of this study - Cardiac MRI at baseline and every 12 months during the study - Echocardiography and stress test at baseline and every 12 months during the study - Cerebrovascular disease at baseline and at last visit of this study (total treatment of 3 years) - MSSI at baseline and every 6 months during this study |
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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 | 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) | Yes |
E.7.1.1 | First administration to humans | No |
E.7.1.2 | Bioequivalence study | No |
E.7.1.3 | Other | Yes |
E.7.1.3.1 | Other trial type description |
Extension of the study PB-102-01 (first administration to humans) and PB-102-02. |
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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 | No |
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.8.3 |
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.8.4.1 | 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 | 2 |
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 |
Paraguay |
Spain |
United Kingdom |
United States |
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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 | 2 |
E.8.9.1 | In the Member State concerned months | 3 |
E.8.9.1 | In the Member State concerned days | 0 |
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 | 9 |