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 |
inherited condition caused by a lack of Factor VIII which is required for blood to clot and stop any bleeding |
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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 | 10060613 |
E.1.2 | Term | Hemophilia A (Factor VIII) |
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 |
Evaluate the efficacy of a single infusion of PF-07055480 in participants ≥18 and <65 years of age with moderately severe to severe hemophilia A (FVIII C ≤ 1%). |
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E.2.2 | Secondary objectives of the trial |
- To demonstrate that the use of exogenous Factor VIII (FVIII) is significantly reduced post PF-07055480 infusion. - To compare additional efficacy parameters post PF-07055480 infusion including use of exogenous FVIII, information on bleeding events and patient-reported outcomes (PROs). - Estimate the durability of efficacy up to 5 years after PF-07055480 infusion. - To estimate the safety and tolerability of PF-07055480, including immunogenicity, for the study duration of 5 years after PF-07055480 infusion. |
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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 |
- Optional vector shedding sub-study, 10 Dec 2019, Version 1: To further characterize the kinetics of vector shedding.
- Optional ultrasounds of the joints sub-study, 10 Dec 2019, Version 1: To compare and evaluate joint health post PF-07055480 infusion to baseline via ultrasounds.
- Optional X-rays of the joints sub-study, 11 Aug 2020, Version 1: To compare joint health post PF-07055480 infusion to baseline and evaluate long-term joint outcomes via X-rays. |
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E.3 | Principal inclusion criteria |
• Males who completed 6 months of routine Factor VIII prophylaxis therapy during the lead in study(C0371004) and have ≥ 150 documented exposure days to a Factor VIII protein product • Moderately severe to severe hemophilia A (Factor VIII activity ≤ 1%) • Suspension of FVIII prophylaxis therapy post study drug infusion
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E.4 | Principal exclusion criteria |
• Anti-AAV6 neutralizing antibodies • History of inhibitor to Factor VIII • Laboratory values at screening visit that are abnormal or outside acceptable study limits • Significant and/or unstable liver disease, biliary disease, significant liver fibrosis • Planned surgical procedure requiring Factor VIII surgical prophylactic factor treatment 12 months from screening visit • Active hepatitis B or C •Serological evidence of human immunodeficiency virus HIV-1 or HIV-2 with Cluster of Differentiation 4 positive (CD4+) cell count ≤200 mm3 and/or viral load >20 copies/mL
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E.5 End points |
E.5.1 | Primary end point(s) |
Annualized bleeding rate (ABR, spontaneous and traumatic bleedings) through 12 months following PF-07055480 infusion (from Week 3) versus ABR on prior Factor VIII (FVIII) prophylaxis replacement regimen.
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E.5.1.1 | Timepoint(s) of evaluation of this end point |
from Week 3 to 12 months (primary analysis) post study drug infusion |
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E.5.2 | Secondary end point(s) |
- Factor VIII (FVIII) activity level after the onset of steady state and through 12 months following infusion of PF-07055480. - Annualized infusion rate (AIR) of exogenous FVIII through 12 months following infusion of PF-07055480 versus AIR on prior FVIII prophylaxis replacement regimen. - The following secondary parameters will be assessed through 12 months after PF-07055480 infusion and compared with prior FVIII prophylaxis replacement regimen: • Annualized FVIII consumption. • Annualized bleeding rate (ABR) of specific type (from Week 3): o by cause (spontaneous or traumatic) o by location (in joints, in target joints, or in soft tissue). • Total ABR (treated and untreated) from Week 3. • Total ABR by location (in joints, in target joints, or in soft tissue) from Week 3. • Percentage of participants without bleeds. • Change in joint health as measured by the Hemophilia Joint Health Score (HJHS) instrument. • Change from baseline at 12 months in the following patient-reported outcome (PRO) endpoints: o Haemophilia Quality of Life Questionnaire for Adults (Haem-A-QoL) o Haemophilia Activities List (HAL). - The following parameters will be analysed yearly and throughout the 5-year study period: • ABR. • Steady state FVIII activity level. • AIR of exogenous FVIII. • Annualized FVIII consumption. • ABR of specific type: o by cause (spontaneous or traumatic). o by location (in joint, in target joints, or in soft tissue). • Total ABR (treated and untreated). • Total ABR by location (in joint, in target joints, or in soft tissue). • Percentage of participants without bleeds. • Change in joint health as measured by the HJHS instrument. • Change in PRO endpoints: Haem-A-QoL and HAL. - Incidence and severity of adverse events (AEs). - Events of special interest (such as hypersensitivity reactions, clinically reported thrombotic events, and malignancy). - Immunogenicity: • Antibodies against adeno-associated virus 6 (AAV6) capsid protein (neutralizing antibodies [nAbs] and anti-drug antibodies [ADAs]). • T-cell responses against AAV6 capsid and against the transgene. • FVIII inhibitors. |
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E.5.2.1 | Timepoint(s) of evaluation of this end point |
- ABR: yearly (after the primary analysis at 12 months) and up to 5 years - FVIII activity level: through 12 months, then yearly and up to 5 years - AIR of exogenous FVIII, annualized FVIII consumption, percentage of participants without bleeds, change in joint health as measured by the HJHS instrument, change in PRO endpoints (Haem-A-QoL and HAL): through 12 months, then yearly and up to 5 years - ABR of specific type, total ABR (treated and untreated), total ABR by location (in joints, in target joints, or in soft tissue): from Week 3 through 12 months, then yearly and up to 5 years - Incidence and severity of AEs, events of special interest, immunogenicity: Up to 5 years. |
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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 | Yes |
E.6.7 | Pharmacodynamic | Yes |
E.6.8 | Bioequivalence | No |
E.6.9 | Dose response | No |
E.6.10 | Pharmacogenetic | Yes |
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
| 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 | 1 |
E.8.5 | The trial involves multiple Member States | Yes |
E.8.5.1 | Number of sites anticipated in the EEA | 15 |
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 |
Belgium |
Brazil |
Canada |
France |
Germany |
Greece |
Israel |
Italy |
Japan |
Korea, Republic of |
Saudi Arabia |
Spain |
Sweden |
Taiwan |
Turkey |
United Kingdom |
United States |
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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
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A participant is considered to have completed the study if he/she has completed the entire study including endo of study (EOS) visit (Week 260). The end of the study is defined as the date of the EOS visit of the last participant in the study. |
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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 | 6 |
E.8.9.1 | In the Member State concerned months | 2 |
E.8.9.1 | In the Member State concerned days | 0 |
E.8.9.2 | In all countries concerned by the trial years | 6 |
E.8.9.2 | In all countries concerned by the trial months | 2 |
E.8.9.2 | In all countries concerned by the trial days | 0 |