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 |
Haemophilia B - Bleeding disorder |
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E.1.1.2 | Therapeutic area | Diseases [C] - Blood and lymphatic diseases [C15] |
MedDRA Classification |
E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 20.0 |
E.1.2 | Level | LLT |
E.1.2 | Classification code | 10018939 |
E.1.2 | Term | Haemophilia B (Factor IX) |
E.1.2 | System Organ Class | 100000004850 |
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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 assess the long-term safety (6-10 years after dosing, inclusive) of a systemic administration of AAV5-hFIX, an adeno-associated viral (AAV) vector containing a codon-optimized human coagulation Factor IX (hFIX) gene, to adult patients with severe or moderately severe haemophilia B.. |
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E.2.2 | Secondary objectives of the trial |
To assess the long-term efficacy of a systemic administration of AAV5-hFIX, an adeno-associated viral (AAV) vector containing a codon-optimized human coagulation Factor IX (hFIX) gene, to adult patients with severe or moderately severe haemophilia B. |
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E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
1. Patients with congenital hemophilia B who completed Study CT-AMT-060-01
2. Able to provide informed consent following receipt of verbal and written information about the trial.
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E.4 | Principal exclusion criteria |
Enrolled patients will have already been assessed based on the exclusion criteria for Study CT-AMT-060-01. |
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E.5 End points |
E.5.1 | Primary end point(s) |
The primary endpoint is to demonstrate the long-term safety (6-10 years) after dosing of AAV5-hFIX.
Primary safety endpoints include the following: - AEs possibly or probably related to previous AAV5-hFIX administration - Neutralizing FIX antibodies (FIX inhibitors) - ALT/AST levels - Liver pathology (assessed by ultrasound) - Alpha-fetoprotein (AFP)
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E.5.1.1 | Timepoint(s) of evaluation of this end point |
The individual subjects will be followed for an additional five years, 6-10 years after dosing of AAV5-hFIX. The occurrence of adverse events (AEs) related to previous AAV5-hFIX administration in patients will be continuously monitored. ALT/AST will be measuredevery 6 months Abdominal ultrasounds will be conducted at study entry (Visit 36) and study exit (Visit 45). Alpha-fetoprotein (AFP) and Anti-AAV5 antibodies will be measured every 12 months
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E.5.2 | Secondary end point(s) |
The secondary endpoints will focus on the long-term efficacy (6-10 years) after dosing of AAV5-hFIX on FIX activity, overall FIX utilization, bleeding events requiring FIX replacement therapy, any procedures, and QoL.
Secondary efficacy endpoints include the following: - Endogenous FIX activity - Utilization of FIX-replacement therapy - Annualized bleeding rate (FIX-requiring); including the following: o All bleeds o Spontaneous bleeds o Traumatic bleeds o Joint bleeds - Procedures (including major and minor surgeries) - Short form (SF-36) and EQ-5D-5L QoL scores - Hemophilia Joint Health Score (HJHS)
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E.5.2.1 | Timepoint(s) of evaluation of this end point |
Endogenous FIX activity, Utilization of FIX-replacement therapy, FIX inhibitors and bleeding rates and procedures will be measured every 6 months
QoL and HJHS will be measured every 12 months |
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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) | 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 study to assess long term safety and efficacy of previously administered treatment |
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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 | 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
| 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 | 4 |
E.8.5 | The trial involves multiple Member States | Yes |
E.8.5.1 | Number of sites anticipated in the EEA | 7 |
E.8.6 Trial involving sites outside the EEA |
E.8.6.1 | Trial being conducted both within and outside the EEA | No |
E.8.6.2 | Trial being conducted completely outside of the EEA | No |
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 | 5 |
E.8.9.1 | In the Member State concerned months | |
E.8.9.1 | In the Member State concerned days | |
E.8.9.2 | In all countries concerned by the trial years | 5 |