Pharmacokinetics and Safety of rFVIIIFc Manufactured at 15,000 L (15K) Scale

Study Overview
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Brief Summary
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The primary objective of the study is to compare the pharmacokinetic (PK) of recombinant coagulation factor VIII Fc fusion protein (rFVIIIFc) manufactured at the current scale of 2000 L (2K) to the PK of rFVIIIFc manufactured at the 15,000 L (15K) scale in previously treated participants with severe hemophilia A. The secondary objectives are: to characterize the PK of rFVIIIFc manufactured at the 15K scale at the 15K baseline and after 13 weeks of treatment; to characterize the PK of rFVIIIFc manufactured at the 15K scale at 1000 IU/vial and 6000 IU/vial strengths; and to evaluate the safety of rFVIIIFc manufactured at the 15K scale.

Detailed Description
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PK assessments are in 3 phases: Pharmacokinetic Assessment 1(PK1): PK assessments following single injection of rFVIIIFc manufactured at the 2K scale. Pharmacokinetic Assessment 2 (PK2): PK assessments are made following a single injection of rFVIIIFc manufactured at the 15K scale where participants are randomized to the 1000 IU vial or 6000 IU/vial strengths. Pharmacokinetic Assessment 3 (PK3): PK assessments are made following 13 weeks of rFVIIIFc treatment manufactured at the 15K scale where participants are randomized to the 1000 IU vial or 6000 IU/vial strengths. After study completion, in countries where rFVIIIFc is not commercially available, eligible participants will be offered enrollment into a long-term safety and efficacy extension study (8HA01EXT [NCT01454739]).

Official Title
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A Randomized, Open-Label Study to Evaluate the Pharmacokinetics and Safety of Recombinant Factor VIII Fc Fusion Protein (rFVIIIFc; BIIB031) Manufactured at 15K Scale and at Different Vial Strengths in Previously Treated Subjects With Severe Hemophilia A

Conditions
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Severe Hemophilia A

Intervention / Treatment
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* Biological: rFVIIIFc


Participation Criteria
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Eligibility Criteria
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Key Inclusion Criteria: Have severe hemophilia A, defined as <1 IU/dL (<1%) endogenous FVIII as determined by one-stage clotting assay from the central laboratory at Screening. Previously treated subject, defined as having at least 150 documented prior exposure days (EDs) to any recombinant and/or plasma-derived FVIII and/or cryoprecipitate products at Day 1. Fresh frozen plasma treatment must not be considered in the count for documented exposure days. No history of a positive inhibitor test or clinical signs of decreased response to FVIII administrations. Family history of inhibitors will not exclude the subject. No measurable inhibitor activity using the Nijmegen-modified Bethesda assay (>=0.6 Bethesda Unit per milliliter [BU/mL] is considered positive) at Screening. Key Exclusion Criteria: Current enrollment in any interventional clinical study in which an investigational drug or approved therapy for investigational use is administered within 30 days prior to the Baseline Visit OR prior participation in any of the following Biogen studies: 998HA101 (NCT01027377), 997HA301 (NCT01181128), 8HA02PED (NCT01458106), 997HA307 (NCT02083965), and 8HA01EXT (NCT01454739). Previous participation in this study. Any concurrent clinically significant major disease that, in the opinion of the Investigator or Biogen, makes the subject unsuitable for participation in the study. Other coagulation disorder(s) in addition to hemophilia A. History of hypersensitivity or anaphylaxis associated with FVIII or intravenous (IV) immunoglobulin administration. NOTE: Other protocol-defined inclusion/exclusion criteria may apply.

Ages Eligible for Study
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Minimum Age: 12 Years

Sexes Eligible for Study
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Male

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Other
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: rFVIIIFc (15K scale) 1000 IU vial<br>Single injection of rFVIIIFc (current 2K scale) followed by 2 single injections of rFVIIIFc (15K scale) 1000 IU vial at PK2 and PK3 timepoints. Participants will be on prophylaxis regimen along with treatment for bleeding episodes for 26 weeks of treatment period using the rFVIIIFc (15K scale) 1000 IU vial. | Biological: rFVIIIFc<br>* As per arm description<br>* Other names: Fc fusion protein;|
| Experimental: rFVIIIFc (15K scale) 6000 IU vial<br>Single injection of rFVIIIFc (current 2K scale) followed by 2 single injections of rFVIIIFc high strength vial (15K scale) at PK2 and PK3 timepoints. Participants will be on prophylaxis regimen along with treatment for bleeding episodes for 26 weeks of treatment period using the rFVIIIFc (15K scale) 6000 IU vial. | Biological: rFVIIIFc<br>* As per arm description<br>* Other names: Fc fusion protein;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Area Under the Concentration-time Curve From Time Zero to Infinity (AUCinf) as Measured by One-stage Activated Partial Thromboplastin Time (aPTT) Clotting Assay for Pharmacokinetic Assessment 1 (PK1) and Pharmacokinetic Assessment 2 (PK2) | AUCinf is area under the concentration-time curve from time zero to infinity. Results were summarized overall for 15K rFVIIIFc 1000 IU/vial and 6000 IU/Vial (PK2). | Pre-dose and post dose at: 0.5 hour (hr), 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Incremental Recovery (IR) as Measured by One-stage aPTT Clotting Assay for PK1 and PK2 | Incremental Recovery is defined as the increase in the circulating FVIII activity in international unit per deciliter (IU/dL) per unit dose administered in international unit per kilogram (IU/kg) (IU/dL per IU/kg). Results were summarized overall for 15K rFVIIIFc 1000 IU/vial and 6000 IU/Vial (PK2). | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Maximum Activity (Cmax) of rFVIIIFc as Measured by One-stage aPTT Clotting Assay for PK1 and PK2 | Cmax is defined as maximum activity of rFVIIIFc. Results were summarized overall for 15K rFVIIIFc 1000 IU/vial and 6000 IU/Vial (PK2). | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Half-life (t½) of rFVIIIFc as Measured by One-stage aPTT Clotting Assay for PK1 and PK2 | Half-life is time required for the concentration of the drug to reach half of its original value. Results were summarized overall for 15K 1000 IU/vial and 6000 IU/Vial (PK2). | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Clearance (CL) of rFVIIIFc as Measured by One-stage aPTT Clotting Assay for PK1 and PK2 | Clearance (CL) is a quantitative measure of the rate at which a drug substance is removed from the body.The total systemic clearance after intravenous dose was estimated by dividing the total administered dose by the plasma Area Under the Plasma Concentration-Time Curve From Time Zero to Infinite Time (AUC[0-infinity]). Results were summarized overall for 15K rFVIIIFc 1000 IU/vial and 6000 IU/Vial (PK2). | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Volume of Distribution at Steady State (Vss) of rFVIIIFc as Measured by One-stage aPTT Clotting Assay for PK1 and PK2 | Vss is defined as the theoretical volume in which the total amount of drug would need to be uniformly distributed to produce the desired blood concentration of a drug. Steady state volume of distribution (Vss) is the apparent volume of distribution at steady-state which is estimated by (D/AUC[0-infinity])*(AUMC[0-infinity])/AUC[0-infinity]) where D is the dose of study drug, AUMC(0-infinity) is the area under the first moment curve extrapolated to infinity and AUC(0-infinity) is the area under the plasma concentration-time curve from time zero to infinite time. Results were summarized overall for 15K rFVIIIFc 1000 IU/vial and 6000 IU/Vial (PK2). | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Mean Residence Time (MRT) of rFVIIIFc as Measured by One-stage aPTT Clotting Assay for PK1 and PK2 | The Mean Residence Time (MRT) is the average time at which the number of absorbed molecules reside in the body, after single-dose administration, and calculated as area under the first moment curve AUMC (0-infinity)/Area Under the Plasma Concentration-Time Curve AUC (0-infinity), where AUMC (0-infinity) is area under the plasma concentration-time first moment curve from time zero to infinite time and AUC (0-infinity) is the area under the plasma concentration-time curve from time zero to infinite time. Results were summarized overall for 15K rFVIIIFc 1000 IU/vial and 6000 IU/Vial (PK2). | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Area Under the Concentration-time Curve From Time Zero to Infinity (AUCinf) as Measured by One-stage aPTT Clotting Assay for PK2 and PK3 | AUCinf is area under the concentration-time curve from time zero to infinity. Results were summarized overall for 15K rFVIIIFc 1000 IU/Vial and 6000 IU/Vial for PK2 and PK3. | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Incremental Recovery (IR) as Measured by One-stage aPTT Clotting Assay for PK2 and PK3 | Incremental Recovery is defined as the increase in the circulating FVIII activity in IU/dL per unit dose administered in IU/kg (IU/dL per IU/kg). Results were summarized overall for 15K rFVIIIFc 1000 IU/Vial and 6000 IU/Vial for PK2 and PK3. | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Maximum Activity (Cmax) of rFVIIIFc as Measured by One-stage aPTT Clotting Assay for PK2 and PK3 | Cmax is defined as maximum activity of rFVIIIFc. Results were summarized overall for 15K rFVIIIFc 1000 IU/Vial and 6000 IU/Vial for PK2 and PK3. | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Half-life (t½) of rFVIIIFc as Measured by One-stage aPTT Clotting Assay for PK2 and PK3 | Time required for the concentration of the drug to reach half of its original value. Results were summarized overall for 15K rFVIIIFc 1000 IU/Vial and 6000 IU/Vial for PK2 and PK3. | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Clearance (CL) of rFVIIIFc as Measured by One-stage aPTT Clotting Assay for PK2 and PK3 | Clearance (CL) is a quantitative measure of the rate at which a drug substance is removed from the body.The total systemic clearance after intravenous dose was estimated by dividing the total administered dose by the plasma Area Under the Plasma Concentration-Time Curve From Time Zero to Infinite Time (AUC[0-infinity]). Results were summarized overall for 15K rFVIIIFc 1000 IU/Vial and 6000 IU/Vial for PK2 and PK3. | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Volume of Distribution at Steady State (Vss) of rFVIIIFc as Measured by One-stage aPTT Clotting Assay for PK2 and PK3 | Vss is defined as the theoretical volume in which the total amount of drug would need to be uniformly distributed to produce the desired blood concentration of a drug. Steady state volume of distribution (Vss) is the apparent volume of distribution at steady-state which is estimated by (D/AUC[0-infinity])*(AUMC[0-infinity])/AUC[0-infinity]) where D is the dose of study drug, AUMC(0-infinity) is the area under the first moment curve extrapolated to infinity and AUC(0-infinity) is the area under the plasma concentration-time curve from time zero to infinite time. Results were summarized overall for 15K rFVIIIFc 1000 IU/Vial and 6000 IU/Vial for PK2 and PK3. | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Mean Residence Time (MRT) of rFVIIIFc as Measured by One-stage aPTT Clotting Assay for PK2 and PK3 | The Mean Residence Time (MRT) is the average time at which the number of absorbed molecules reside in the body, after single-dose administration, and calculated as area under the first moment curve AUMC (0-infinity)/Area Under the Plasma Concentration-Time Curve AUC (0-infinity), where AUMC (0-infinity) is area under the plasma concentration-time first moment curve from time zero to infinite time and AUC (0-infinity) is the area under the plasma concentration-time curve from time zero to infinite time. Results were summarized overall for 15K rFVIIIFc 1000 IU/Vial and 6000 IU/Vial for PK2 and PK3. | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Area Under the Concentration-time Curve From Time Zero to Infinity (AUCinf) as Measured by One-stage aPTT Clotting Assay for PK2 at Different Vial Strengths (1000 and 6000 IU/Vial) | AUCinf is area under the concentration-time curve from time zero to infinity. | Pre-dose and post dose at: 0.5 hour (hr), 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Incremental Recovery (IR) of rFVIIIFc as Measured by One-stage aPTT Clotting Assay for PK2 at Different Vial Strengths (1000 and 6000 IU/Vial) | Incremental Recovery is defined as the increase in the circulating FVIII activity in international unit per deciliter (IU/dL) per unit dose administered in international unit per kilogram (IU/kg) (IU/dL per IU/kg). | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Maximum Activity (Cmax) of rFVIIIFc as Measured by One-stage aPTT Clotting Assay for PK2 at Different Vial Strengths (1000 and 6000 IU/Vial) | Cmax is defined as maximum activity of rFVIIIFc. | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Half-life (t½) of rFVIIIFc as Measured by One-stage aPTT Clotting Assay for PK2 at Different Vial Strengths (1000 and 6000 IU/Vial) | Time required for the concentration of the drug to reach half of its original value. | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Clearance (CL) of rFVIIIFc as Measured by One-stage aPTT Clotting Assay for PK2 at Different Vial Strengths (1000 and 6000 IU/Vial) | Clearance (CL) is a quantitative measure of the rate at which a drug substance is removed from the body.The total systemic clearance after intravenous dose was estimated by dividing the total administered dose by the plasma Area Under the Plasma Concentration-Time Curve From Time Zero to Infinite Time (AUC[0-infinity]). | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Volume of Distribution at Steady State (Vss) of rFVIIIFc as Measured by One-stage aPTT Clotting Assay for PK2 at Different Vial Strengths (1000 and 6000 IU/Vial) | Vss is defined as the theoretical volume in which the total amount of drug would need to be uniformly distributed to produce the desired blood concentration of a drug. Steady state volume of distribution (Vss) is the apparent volume of distribution at steady-state which is estimated by (D/AUC[0-infinity])*(AUMC[0-infinity])/AUC[0-infinity]) where D is the dose of study drug, AUMC(0-infinity) is the area under the first moment curve extrapolated to infinity and AUC(0-infinity) is the area under the plasma concentration-time curve from time zero to infinite time. | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Mean Residence Time (MRT) of rFVIIIFc as Measured by One-stage aPTT Clotting Assay for PK2 at Different Vial Strengths (1000 and 6000 IU/Vial) | The Mean Residence Time (MRT) is the average time at which the number of absorbed molecules reside in the body, after single-dose administration, and calculated as area under the first moment curve AUMC (0-infinity)/Area Under the Plasma Concentration-Time Curve AUC (0-infinity), where AUMC (0-infinity) is area under the plasma concentration-time first moment curve from time zero to infinite time and AUC (0-infinity) is the area under the plasma concentration-time curve from time zero to infinite time. | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Area Under the Concentration-time Curve From Time Zero to Infinity (AUCinf) as Measured by One-stage aPTT Clotting Assay for PK3 at Different Vial Strengths (1000 and 6000 IU/Vial) | AUCinf is area under the concentration-time curve from time zero to infinity. | Pre-dose and post dose at: 0.5 hour (hr), 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Incremental Recovery (IR) of rFVIIIFc as Measured by One-stage aPTT Clotting Assay for PK3 at Different Vial Strengths (1000 and 6000 IU/Vial) | Incremental Recovery is defined as the increase in the circulating FVIII activity in international unit per deciliter (IU/dL) per unit dose administered in international unit per kilogram (IU/kg) (IU/dL per IU/kg). | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Maximum Activity (Cmax) of rFVIIIFc as Measured by One-stage aPTT Clotting Assay for PK3 at Different Vial Strengths (1000 and 6000 IU/Vial) | Cmax is defined as maximum activity of rFVIIIFc. | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Half-life (t½) of rFVIIIFc as Measured by One-stage aPTT Clotting Assay for PK3 at Different Vial Strengths (1000 and 6000 IU/Vial) | Time required for the concentration of the drug to reach half of its original value. | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Clearance (CL) of rFVIIIFc as Measured by One-stage aPTT Clotting Assay for PK3 at Different Vial Strengths (1000 and 6000 IU/Vial) | Clearance (CL) is a quantitative measure of the rate at which a drug substance is removed from the body.The total systemic clearance after intravenous dose was estimated by dividing the total administered dose by the plasma Area Under the Plasma Concentration-Time Curve From Time Zero to Infinite Time (AUC[0-infinity]). | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Volume of Distribution at Steady State (Vss) of rFVIIIFc as Measured by One-stage aPTT Clotting Assay for PK3 at Different Vial Strengths (1000 and 6000 IU/Vial) | Vss is defined as the theoretical volume in which the total amount of drug would need to be uniformly distributed to produce the desired blood concentration of a drug. Steady state volume of distribution (Vss) is the apparent volume of distribution at steady-state which is estimated by (D/AUC[0-infinity])*(AUMC[0-infinity])/AUC[0-infinity]) where D is the dose of study drug, AUMC(0-infinity) is the area under the first moment curve extrapolated to infinity and AUC(0-infinity) is the area under the plasma concentration-time curve from time zero to infinite time. | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Mean Residence Time (MRT) of rFVIIIFc as Measured by One-stage aPTT Clotting Assay for PK3 at Different Vial Strengths (1000 and 6000 IU/Vial) | The Mean Residence Time (MRT) is the average time at which the number of absorbed molecules reside in the body, after single-dose administration, and calculated as area under the first moment curve AUMC (0-infinity)/Area Under the Plasma Concentration-Time Curve AUC (0-infinity), where AUMC (0-infinity) is area under the plasma concentration-time first moment curve from time zero to infinite time and AUC (0-infinity) is the area under the plasma concentration-time curve from time zero to infinite time. | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Area Under the Concentration-time Curve From Time Zero to Infinity (AUCinf) as Measured by the Two-stage Chromogenic Assay for PK1 and PK2 | AUCinf is area under the concentration-time curve from time zero to infinity. Results were summarized overall for 15K rFVIIIFc 1000 IU/vial and 6000 IU/Vial (PK2). | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Incremental Recovery (IR) as Measured by the Two-stage Chromogenic Assay for PK1 and PK2 | Incremental Recovery is defined as the increase in the circulating FVIII activity in IU/dL per unit dose administered in IU/kg (IU/dL per IU/kg). Results were summarized overall for 15K rFVIIIFc 1000 IU/vial and 6000 IU/Vial (PK2). | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Maximum Activity (Cmax) of rFVIIIFc as Measured by the Two-stage Chromogenic Assay for PK1 and PK2 | Cmax is defined as maximum activity of rFVIIIFc. Results were summarized overall for 15K rFVIIIFc 1000 IU/vial and 6000 IU/Vial (PK2). | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Half-life (t½) of rFVIIIFc as Measured by the Two-stage Chromogenic Assay for PK1 and PK2 | Time required for the concentration of the drug to reach half of its original value. Results were summarized overall for 15K rFVIIIFc 1000 IU/vial and 6000 IU/Vial (PK2). | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Clearance (CL) of rFVIIIFc as Measured by the Two-stage Chromogenic Assay for PK1 and PK2 | Clearance (CL) is a quantitative measure of the rate at which a drug substance is removed from the body.The total systemic clearance after intravenous dose was estimated by dividing the total administered dose by the plasma Area Under the Plasma Concentration-Time Curve From Time Zero to Infinite Time (AUC[0-infinity]). Results were summarized overall for 15K rFVIIIFc 1000 IU/vial and 6000 IU/Vial (PK2). | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Volume of Distribution at Steady State (Vss) of rFVIIIFc as Measured by the Two-stage Chromogenic Assay for PK1 and PK2 | Vss is defined as the theoretical volume in which the total amount of drug would need to be uniformly distributed to produce the desired blood concentration of a drug. Steady state volume of distribution (Vss) is the apparent volume of distribution at steady-state which is estimated by (D/AUC[0-infinity])*(AUMC[0-infinity])/AUC[0-infinity]) where D is the dose of study drug, AUMC(0-infinity) is the area under the first moment curve extrapolated to infinity and AUC(0-infinity) is the area under the plasma concentration-time curve from time zero to infinite time. Results were summarized overall for 15K rFVIIIFc 1000 IU/vial and 6000 IU/Vial (PK2). | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Mean Residence Time (MRT) of rFVIIIFc as Measured by the Two-stage Chromogenic Assay for PK1 and PK2 | The Mean Residence Time (MRT) is the average time at which the number of absorbed molecules reside in the body, after single-dose administration, and calculated as area under the first moment curve AUMC (0-infinity)/Area Under the Plasma Concentration-Time Curve AUC (0-infinity), where AUMC (0-infinity) is area under the plasma concentration-time first moment curve from time zero to infinite time and AUC (0-infinity) is the area under the plasma concentration-time curve from time zero to infinite time. Results were summarized overall for 15K rFVIIIFc 1000 IU/vial and 6000 IU/Vial (PK2). | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Area Under the Concentration-time Curve From Time Zero to Infinity (AUCinf) as Measured by the Two-stage Chromogenic Assay for PK2 and PK3 | AUCinf is area under the concentration-time curve from time zero to infinity. Results were summarized overall for 15K rFVIIIFc 1000 IU/Vial and 6000 IU/Vial for PK2 and PK3. | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Incremental Recovery (IR) as Measured by the Two-stage Chromogenic Assay for PK2 and PK3 | Incremental Recovery is defined as the increase in the circulating FVIII activity in IU/dL per unit dose administered in IU/kg (IU/dL per IU/kg). Results were summarized overall for 15K rFVIIIFc 1000 IU/Vial and 6000 IU/Vial for PK2 and PK3. | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Maximum Activity (Cmax) of rFVIIIFc as Measured by the Two-stage Chromogenic Assay for PK2 and PK3 | Cmax is defined as maximum activity of rFVIIIFc. Results were summarized overall for 15K rFVIIIFc 1000 IU/Vial and 6000 IU/Vial for PK2 and PK3. | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Half-life (t½) of rFVIIIFc as Measured by the Two-stage Chromogenic Assay for PK2 and PK3 | Time required for the concentration of the drug to reach half of its original value. Results were summarized overall for 15K rFVIIIFc 1000 IU/Vial and 6000 IU/Vial for PK2 and PK3. | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Clearance (CL) of rFVIIIFc as Measured by the Two-stage Chromogenic Assay for PK2 and PK3 | Clearance (CL) is a quantitative measure of the rate at which a drug substance is removed from the body.The total systemic clearance after intravenous dose was estimated by dividing the total administered dose by the plasma Area Under the Plasma Concentration-Time Curve From Time Zero to Infinite Time (AUC[0-infinity]). Results were summarized overall for 15K rFVIIIFc 1000 IU/Vial and 6000 IU/Vial for PK2 and PK3. | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Volume of Distribution at Steady State (Vss) of rFVIIIFc as Measured the Two-stage Chromogenic Assay for PK2 and PK3 | Vss is defined as the theoretical volume in which the total amount of drug would need to be uniformly distributed to produce the desired blood concentration of a drug. Steady state volume of distribution (Vss) is the apparent volume of distribution at steady-state which is estimated by (D/AUC[0-infinity])*(AUMC[0-infinity])/AUC[0-infinity]) where D is the dose of study drug, AUMC(0-infinity) is the area under the first moment curve extrapolated to infinity and AUC(0-infinity) is the area under the plasma concentration-time curve from time zero to infinite time. Results were summarized overall for 15K rFVIIIFc 1000 IU/Vial and 6000 IU/Vial for PK2 and PK3. | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Mean Residence Time (MRT) of rFVIIIFc as Measured by the Two-stage Chromogenic Assay for PK2 and PK3 | The Mean Residence Time (MRT) is the average time at which the number of absorbed molecules reside in the body, after single-dose administration, and calculated as area under the first moment curve AUMC (0-infinity)/Area Under the Plasma Concentration-Time Curve AUC (0-infinity), where AUMC (0-infinity) is area under the plasma concentration-time first moment curve from time zero to infinite time and AUC (0-infinity) is the area under the plasma concentration-time curve from time zero to infinite time. Results were summarized overall for 15K rFVIIIFc 1000 IU/Vial and 6000 IU/Vial for PK2 and PK3. | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Area Under the Concentration-time Curve From Time Zero to Infinity (AUCinf) as Measured by the Two-stage Chromogenic Assay for PK2 at Different Vial Strengths (1000 and 6000 IU/Vial) | AUCinf is area under the concentration-time curve from time zero to infinity. | Pre-dose and post dose at: 0.5 hour (hr), 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Incremental Recovery (IR) of rFVIIIFc as Measured by the Two-stage Chromogenic Assay for PK2 at Different Vial Strengths (1000 and 6000 IU/Vial) | Incremental Recovery is defined as the increase in the circulating FVIII activity in international unit per deciliter (IU/dL) per unit dose administered in international unit per kilogram (IU/kg) (IU/dL per IU/kg). | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Maximum Activity (Cmax) of rFVIIIFc as Measured by the Two-stage Chromogenic Assay for PK2 at Different Vial Strengths (1000 and 6000 IU/Vial) | Cmax is defined as maximum activity of rFVIIIFc. | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Half-life (t½) of rFVIIIFc as Measured by the Two-stage Chromogenic Assay for PK2 at Different Vial Strengths (1000 and 6000 IU/Vial) | Time required for the concentration of the drug to reach half of its original value. | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Clearance (CL) of rFVIIIFc as Measured by the Two-stage Chromogenic Assay for PK2 at Different Vial Strengths (1000 and 6000 IU/Vial) | Clearance (CL) is a quantitative measure of the rate at which a drug substance is removed from the body.The total systemic clearance after intravenous dose was estimated by dividing the total administered dose by the plasma Area Under the Plasma Concentration-Time Curve From Time Zero to Infinite Time (AUC[0-infinity]). | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Volume of Distribution at Steady State (Vss) of rFVIIIFc as Measured by the Two-stage Chromogenic Assay for PK2 at Different Vial Strengths (1000 and 6000 IU/Vial) | Vss is defined as the theoretical volume in which the total amount of drug would need to be uniformly distributed to produce the desired blood concentration of a drug. Steady state volume of distribution (Vss) is the apparent volume of distribution at steady-state which is estimated by (D/AUC[0-infinity])*(AUMC[0-infinity])/AUC[0-infinity]) where D is the dose of study drug, AUMC(0-infinity) is the area under the first moment curve extrapolated to infinity and AUC(0-infinity) is the area under the plasma concentration-time curve from time zero to infinite time. | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Mean Residence Time (MRT) of rFVIIIFc as Measured by the Two-stage Chromogenic Assay for PK2 at Different Vial Strengths (1000 and 6000 IU/Vial) | The Mean Residence Time (MRT) is the average time at which the number of absorbed molecules reside in the body, after single-dose administration, and calculated as area under the first moment curve AUMC (0-infinity)/Area Under the Plasma Concentration-Time Curve AUC (0-infinity), where AUMC (0-infinity) is area under the plasma concentration-time first moment curve from time zero to infinite time and AUC (0-infinity) is the area under the plasma concentration-time curve from time zero to infinite time. | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Area Under the Concentration-time Curve From Time Zero to Infinity (AUCinf) as Measured by the Two-stage Chromogenic Assay for PK3 at Different Vial Strengths (1000 and 6000 IU/Vial) | AUCinf is area under the concentration-time curve from time zero to infinity. | Pre-dose and post dose at: 0.5 hour (hr), 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Incremental Recovery (IR) of rFVIIIFc as Measured by the Two-stage Chromogenic Assay for PK3 at Different Vial Strengths (1000 and 6000 IU/Vial) | Incremental Recovery is defined as the increase in the circulating FVIII activity in international unit per deciliter (IU/dL) per unit dose administered in international unit per kilogram (IU/kg) (IU/dL per IU/kg). | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Maximum Activity (Cmax) of rFVIIIFc as Measured by the Two-stage Chromogenic Assay for PK3 at Different Vial Strengths (1000 and 6000 IU/Vial) | Cmax is defined as maximum activity of rFVIIIFc. | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Half-life (t½) of rFVIIIFc as Measured by the Two-stage Chromogenic Assay for PK3 at Different Vial Strengths (1000 and 6000 IU/Vial) | Time required for the concentration of the drug to reach half of its original value. | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Clearance (CL) of rFVIIIFc as Measured by the Two-stage Chromogenic Assay for PK3 at Different Vial Strengths (1000 and 6000 IU/Vial) | Clearance (CL) is a quantitative measure of the rate at which a drug substance is removed from the body.The total systemic clearance after intravenous dose was estimated by dividing the total administered dose by the plasma Area Under the Plasma Concentration-Time Curve From Time Zero to Infinite Time (AUC[0-infinity]). | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Volume of Distribution at Steady State (Vss) of rFVIIIFc as Measured by the Two-stage Chromogenic Assay for PK3 at Different Vial Strengths (1000 and 6000 IU/Vial) | Vss is defined as the theoretical volume in which the total amount of drug would need to be uniformly distributed to produce the desired blood concentration of a drug. Steady state volume of distribution (Vss) is the apparent volume of distribution at steady-state which is estimated by (D/AUC[0-infinity])*(AUMC[0-infinity])/AUC[0-infinity]) where D is the dose of study drug, AUMC(0-infinity) is the area under the first moment curve extrapolated to infinity and AUC(0-infinity) is the area under the plasma concentration-time curve from time zero to infinite time. | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Mean Residence Time (MRT) of rFVIIIFc as Measured by the Two-stage Chromogenic Assay for PK3 at Different Vial Strengths (1000 and 6000 IU/Vial) | The Mean Residence Time (MRT) is the average time at which the number of absorbed molecules reside in the body, after single-dose administration, and calculated as area under the first moment curve AUMC (0-infinity)/Area Under the Plasma Concentration-Time Curve AUC (0-infinity), where AUMC (0-infinity) is area under the plasma concentration-time first moment curve from time zero to infinite time and AUC (0-infinity) is the area under the plasma concentration-time curve from time zero to infinite time. | Pre-dose and post dose at: 0.5 hr, 1 hr, 6 hr, 24 hr, 48 hr, 72 hr and 96 hr | 
| Development of Inhibitors as Measured by the Nijmegen-modified Bethesda Assay | An inhibitor test result greater than or equal to (>=)0.6 Bethesda units [BU]/mL, confirmed on 2 separate samples drawn 2 to 4 weeks apart, was considered positive. The test was performed by the central laboratory using the Nijmegen-modified Bethesda Assay. An exact 95% confidence interval (CI) for the percentage of participants with a confirmed inhibitor was calculated using the Clopper-Pearson method for a binomial proportion. Percentage of participants with confirmed inhibitor development was summarized overall. | At screening and predose on Day 1, 13 and 26 weeks after PK2 injection or at Early Termination (Approximately 43 weeks) | 
| Number of Participants With Treatment Emergent Adverse Events (TEAEs) at 15K Manufacturing Scale | An AE is any untoward medical occurrence in a patient or clinical investigation participant administered a pharmaceutical product and that does not necessarily have a causal relationship with this treatment. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease temporally associated with the use of a medicinal (investigational) product, whether or not related to the medicinal (investigational) product. Number of Participants with TEAEs were summarized overall. | Approximately 43 weeks | 
| Number of Participants With Treatment Emergent Serious Adverse Events (TESAEs) at 15K Manufacturing Scale | An SAE is any untoward medical occurrence that at any dose: results in death or in the view of the Investigator, places the participant at immediate risk of death (a life-threatening event); requires inpatient hospitalization or prolongation of existing hospitalization; results in persistent or significant disability/incapacity; or results in a congenital anomaly/birth defect. All major surgeries will be reported as SAEs. An SAE may also be any other medically important event that, in the opinion of the Investigator, may jeopardize the participant or may require intervention to prevent one of the other outcomes listed in the SAE definition. Number of participants with TESAEs were summarized overall. | Approximately 43 weeks | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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rFVIIIFc, Eloctate, Hemophilia