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 |
Disease in which clotting factor IX (FIX) is deficient or inactive. Subjects with this condition have an increased risk to bleed compared to unaffected individuals. Hemophilia B |
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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 | 17.1 |
E.1.2 | Level | LLT |
E.1.2 | Classification code | 10060614 |
E.1.2 | Term | Hemophilia 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 characterize the safety and efficacy of rFIX in children less than 6 years of age with severe hemophilia B in the setting of acute bleeding episodes, prophylaxis, and/or surgery.
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E.2.2 | Secondary objectives of the trial |
To measure the incremental recovery of rFIX in children following a 75 international unit (IU) per kilogram(kg) bolus infusion.
To describe the immunogenicity/neoantigenicity of rFIX in patients regardless of previous FIX treatment by monitoring for inhibitor development (BIA) during the trial.
To perform surveillance for other events of interest: thrombogenicity, hemorrhage/lack of effect, allergic-type manifestations, and red blood cell (RBC) agglutination.
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E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
1. Severe hemophilia B (plasma FIX activity level [FIX:C] less than or equal to [=<]1 percent [%]).
2. Less than 5 years of age (in order to complete study treatment before age 6).
3. In the investigator’s judgment, the subject and/or caregiver will be compliant to study procedures.
4. The parent or legal guardian has voluntarily signed and dated written informed consent before any screening procedures.
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E.4 | Principal exclusion criteria |
1. The subject has a currently detectable FIX inhibitor (or history of an inhibitor) defined as greater than or equal to [>=] 0.6 Bethesda Units (BU). A family history of inhibitors will not exclude the subjects.
2. Impaired hepatic function defined as greater than (>) 2.5 * Upper limit of normal (ULN) of Alanine aminotransferase (ALT), Aspartate aminotransferase (AST) and/or total bilirubin, except
in documented hyperbilirubinemia of the newborn.
3. Impaired renal function (serum creatinine >1.25 *ULN).
4. Albumin less than (<) Lower limit of normal (LLN).
5. Platelet count <100,000 per millimetre cube (mm^3).
6. Abnormal prothrombin time (>1.25 * ULN).
7. Known hypersensitivity to protein products or agents related to the test article, eg, hamster proteins.
8. Documented HIV infection; or active infection with hepatitis.
9. Any genetic coagulation disorder other than hemophilia B (with the exception of vitamin K-dependent coagulation deficiency of the newborn).
10. Received any investigational drug within 30 days before entering the study.
11. Any condition (medical or social) that, in the investigator's judgment, makes participation in the study not advisable.
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E.5 End points |
E.5.1 | Primary end point(s) |
1)Dose of Recombinant Human Factor IX (rFIX)
2) Number of Recombinant Human Factor IX (rFIX) Infusions
3) Response to Treatment
4) Dose of Breakthrough Bleeding Episodes per 30-day Period During Prophylaxis Therapy
5) Number of Infusions of Breakthrough Bleeding Episodes per 30-day Period During Prophylaxis Therapy
6) Number of Breakthrough Bleeding Episodes per 30-day Period During Prophylaxis Therapy
7) Dose of rFIX During the Operative Period
8) Response of rFIX During the Operative Period
9) Physician’s Global Assessment of Efficacy
10) Overall Number of Subjects With Treatment-Emergent Adverse Events (AEs) or Serious Adverse Events (SAEs) |
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E.5.1.1 | Timepoint(s) of evaluation of this end point |
1) Baseline up to Month 12
2) Baseline up to Month 12
3) 24 Hours after infusion
4) Baseline up to Month 12
5) Baseline up to Month 12
6) Baseline up to Month 12
7) Before preoperative rFIX infusion up to between 15 to 30 minutes following completion of the infusion
8) Before preoperative rFIX infusion up to between 15 to 30 minutes following completion of the infusion
9) Month 1 up to 12
10) Baseline up to Month 12 |
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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 | 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.8.2.4 | Number of treatment arms in the trial | 1 |
E.8.3 |
Will this trial be conducted at a single site globally?
| No |
E.8.4 | Will this trial be conducted at multiple sites globally? | Yes |
E.8.6 Trial involving sites outside the EEA |
E.8.6.2 | Trial being conducted completely outside of the EEA | No |
E.8.6.3 | Specify the countries outside of the EEA in which trial sites are planned |
France |
Spain |
Sweden |
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.8.9.2 | In all countries concerned by the trial years | 5 |
E.8.9.2 | In all countries concerned by the trial months | 1 |
E.8.9.2 | In all countries concerned by the trial days | 0 |