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 |
Factor X deficiency is a lack of human coagulation factor X, one of the proteins in blood which enables blood to clot. This deficiency can cause patients to bleed spontaneously or following trauma. |
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E.1.1.2 | Therapeutic area | Diseases [C] - Blood and lymphatic diseases [C15] |
MedDRA Classification |
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 efficacy of FACTOR X in the prevention of bleeding when given as routine prophylaxis over 6 months
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E.2.2 | Secondary objectives of the trial |
(1) to assess the pharmacokinetics of FACTOR X after a single dose of 50 IU/kg
(2) to assess the safety of FACTOR X when given as routine prophylaxis over 6 months
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E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
Children with hereditary severe or moderate FX deficiency (<5 IU/dL FX:C, based on their lowest reliable FX:C recorded)
Children under 12 years old, whose parent/guardian has given informed consent.
Children with a history of severe bleeding (a minimum of one bleed with a bleed score of 3 or 4, Appendix XI), or a mutation in the F10 gene causing a documented severe bleeding phenotype.
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E.4 | Principal exclusion criteria |
Children must not suffer from clinically significant liver disease, renal disease, or other coagulopathy or thrombophilia, and must have no history of inhibitors to FX.
Children who have known or suspected hypersensitivity to the investigational medicinal product or its excipients.
Children with a history of unreliability or non-cooperation.
Children who are participating or have taken part in another trial within the last 30 days.
Children planning more than 4 weeks’ continuous absence from the locality of the investigational site, between the Screening Visit and the End of Study Visit.
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E.5 End points |
E.5.1 | Primary end point(s) |
The investigator’s assessment of the efficacy of FACTOR X in the reduction/prevention of bleeding when given as routine prophylaxis over 6 months.
This will take into account the child’s risk of breakthrough bleeding (due to bleeding history, treatment history and genetic mutation) and other relevant factors eg compliance with the protocol, attainment of required FX:C trough levels.
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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) |
Number of bleeds per month including severity, duration, location and cause.
Investigator’s and parent's/guardian's assessment of efficacy in treating a bleed for all bleeds (parent/guardian assessment) and for bleeds treated at hospital (investigator's assessment).
Factor X activity trough levels at all scheduled study visits and at all Bleed Assessment and Trough Measurement unscheduled Visits.
FX:C 30 minute post-dose incremental recovery at the Baseline Visit and the End of Study Visit.
Factor X activity incremental recovery and trough levels following any change in dose regimen required for clinical reasons/insufficient trough levels.
Dose to treat a bleed (IU/kg FX:C) (including initial dose for new bleeds and any repeated doses for ongoing bleeds), number of infusions to treat a bleed and dose per infusion; all analysed on a per bleed and a per subject basis.
Total dose in IU/kg of factor X (factor X activity), total number of infusions and average dose per infusion for: prophylactic use, to treat a bleed, any additional preventative use, any surgical use and overall use; all analysed on a per subject basis.
Average monthly dose in IU/kg of factor X (factor X activity), and average monthly number of infusions for: prophylactic use, to treat a bleed, any additional preventative use, any surgical use and overall use; all analysed on a per subject basis. |
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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 | Yes |
E.6.3 | Therapy | Yes |
E.6.4 | Safety | Yes |
E.6.5 | Efficacy | Yes |
E.6.6 | Pharmacokinetic | Yes |
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.8.3 |
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 | 3 |
E.8.5 | The trial involves multiple Member States | No |
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 |
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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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Last child's follow up safety assessment. |
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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 | 5 |
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 | 5 |
E.8.9.2 | In all countries concerned by the trial days | 0 |