A Study of Adynovate in Previously Treated Chinese Teenagers and Adults With Severe Hemophilia A

Takeda37 enrolled

Overview

The main aim of the study is to determine how well Adynovate works to decrease bleeding in previously treated Chinese men and boys with severe hemophilia A when given prophylactically. Participants will be treated with Adynovate twice a week for 26 weeks or until participants have received 50 days of treatment with Adynovate (whichever takes longer). Participants will need to visit their study clinic several times during their participation.

Study Type

INTERVENTIONAL

Allocation

Purpose

TREATMENT

Masking

NONE

Enrollment

Conditions

Hemophilia A

Interventions

AdynovateBIOLOGICAL

Adynovate was injected intravenously using an appropriately sized syringe as a bolus infusion over a period of less than or equal to (\<=) 5 minutes (maximum infusion rate, 10 milliliters per minute \[mL/min\]).

Eligibility

Sex: MALEMin age: 12 YearsMax age: 65 Years

Medical Language ↔ Plain English

Inclusion Criteria: 1. Participant and/or legally authorized representative must voluntarily sign a written informed consent form (ICF) after all relevant aspects of the study have been explained and discussed with the Participant. For the participants less than (\<) 18 years old, participants will give assent AND their parents/legally authorized representative should sign the ICF accordingly. 2. Participant and/or legally authorized representative understands and is willing and able to comply with all requirements of the study protocol. 3. Participant should be ethnic Chinese. 4. Participant is 12 to 65 years of age at screening and male. 5. Participant has severe hemophilia A (FVIII clotting activity \<1 percent \[%\]) as confirmed by the central laboratory at screening after a washout period of at least 72 to 96 hours. 6. The last on-demand or prophylactic treatment received is within 3 months before screening. 7. Participant has documented previous treatment with plasma-derived FVIII concentrates or recombinant FVIII for greater than (\>) 150 EDs. 8. Participant is human immunodeficiency virus (HIV)-negative, or HIV-positive with stable disease and CD4+ count greater than or equal to (\>=) 200 cells per cubic millimeter (/mm\^3). 9. Participant is hepatitis C virus (HCV) negative by antibody testing (if positive, additional polymerase chain reaction testing will be performed to confirm), as confirmed at screening; or HCV-positive with chronic stable hepatitis, as assessed by the investigator. Exclusion Criteria: 1. Participant has detectable FVIII inhibitory antibodies (\>=0.6 Bethesda units \[BU\] per milliliter \[/mL\] using the Nijmegen modification of the Bethesda assay) as confirmed by the central laboratory at screening. 2. Participant has a confirmed history of FVIII inhibitory antibodies (\>=0.6 BU using the Nijmegen modification of the Bethesda assay or \>=0.6 BU using the Bethesda assay) at any time prior to screening. 3. Participant has a known hypersensitivity to Adynovate or ADVATE or any of the components of the study drugs, such as mouse or hamster proteins, or other FVIII products. 4. Participant has been diagnosed with an inherited or acquired hemostatic defect other than hemophilia A (example, qualitative platelet defect or von Willebrand's disease). 5. Participant has severe hepatic dysfunction (example, \>=5 times the upper limit of normal \[ULN\] for alanine aminotransferase \[ALT\] or aspartate aminotransferase \[AST\], a recent or persistent international normalized ratio \[INR\] \>1.5, as confirmed by the local laboratory at screening). 6. Participant has severe renal impairment (serum creatinine \>1.5 times the ULN) as confirmed by the local laboratory at screening. 7. Participant is planned or likely to undergo major surgery during the study period. 8. Participant has current or recent (\<30 days) use of other PEGylated drugs before study participation or scheduled use of such drugs during study participation. 9. Participant has received emicizumab therapy within 6 months of screening. 10. Participant is currently receiving, or scheduled to receive during the study, an immunomodulating drug (example, systemic corticosteroid agent at a dose equivalent to hydrocortisone \>10 milligram per day \[mg/day\], or alpha-interferon) other than antiretroviral chemotherapy. 11. Participant has participated in another clinical study involving the use of an investigational product (IP) other than Adynovate or an investigational device within 30 days before the screening visit or is scheduled to participate in another clinical study involving an IP or investigational device during this study. 12. Participant has a medical, psychiatric, or cognitive illness or recreational drug/alcohol use that, in the opinion of the investigator, would affect participant safety or compliance. 13. Participant, in the opinion of the investigator, is unable or unwilling to comply with the study protocol.

Locations (12)

Beijing Children's Hospital, Capital Medical University

Beijing, China

Peking Union Medical College Hospital, Chinese Academy of Medical Sciences

Beijing, China

Xiangya Hospital of Central South University

Changsha, China

Outcomes

Primary Outcomes

Total Annualized Bleeding Rates (ABR)

Total ABR was defined as the number of treated and non-treated bleeding episodes (BEs) that occurred during the treatment period, calculated as, ABR= number of unique bleeds during treatment period/(length of treatment period \[days\]/365.25). Total ABR for all BEs, spontaneous or traumatic, recorded in the participant's electronic diary and/or recorded in the physician/nurse/study site notes were reported.

Time frame: Baseline through study completion or ≥50 EDs whichever occurred last (approximately 28 weeks)

Secondary Outcomes

ABR Based on Bleeding Site

ABR= number of unique bleeds during treatment period/(length of treatment period \[days\]/365.25). ABR for BEs based on bleeding site: joint or non-joint, recorded in the participant's electronic diary and/or recorded in the physician/nurse/study site notes were reported.

Time frame: Baseline through study completion or ≥50 EDs whichever occurred last (approximately 28 weeks)

ABR Based on Bleeding Cause

ABR= number of unique bleeds during treatment period/(length of treatment period \[days\]/365.25). ABR for BEs based on bleeding cause: spontaneous/unknown or injury, recorded in the participant's electronic diary and/or recorded in the physician/nurse/study site notes were reported.

Time frame: Baseline through study completion or ≥50 EDs whichever occurred last (approximately 28 weeks)

Number of Adynovate Infusions Per Week During the Prophylactic Treatment Period

Time frame: Baseline through study completion or ≥50 EDs whichever occurred last (approximately 28 weeks)

Number of Adynovate Infusions Per Month During the Prophylactic Treatment Period

Time frame: Baseline through study completion or ≥50 EDs whichever occurred last (approximately 28 weeks)

Data from ClinicalTrials.gov

This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.

Fujian Medical University Union Hospital

Fuzhou, China

Nanfang Hospital Southern Medical University

Guangzhou, China

Anhui Province Hospital

Hefei, China

Jinan Central Hospital

Jinan, China

Shenzhen Second People's Hospital

Shenzhen, China

The First Affiliated Hospital of Soochow University

Suzhou, China

Institute of Hematology and Blood Diseases Hospital Chinese Academy of Medical Sciences

Tianjin, China

...and 2 more locations

Weight-adjusted Consumption of Adynovate Per Week During the Prophylactic Treatment Period

Weight-adjusted consumption (IU/kg) was derived as the total units infused (IU) divided by the last available body weight (kg) prior to the infusion.

Time frame: Baseline through study completion or ≥50 EDs whichever occurred last (approximately 28 weeks)

Weight-adjusted Consumption of Adynovate Per Month During the Prophylactic Treatment Period

Weight-adjusted consumption (IU/kg) was derived as the total units infused (IU) divided by the last available body weight (kg) prior to the infusion.

Time frame: Baseline through study completion or ≥50 EDs whichever occurred last (approximately 28 weeks)

Percentage of Participants With Zero Bleeding Episodes During the Study

Percentages were rounded off to the nearest single decimal place.

Time frame: Baseline through study completion or ≥50 EDs whichever occurred last (approximately 28 weeks)

Average Time Interval Between Bleeding Episodes (BEs)

Average time interval between bleeding episodes (days)= Length of treatment period (days)/ Number of unique bleeds during treatment period. Average time interval was computed for participants with more than 1 unique BEs.

Time frame: Baseline through study completion or ≥50 EDs whichever occurred last (approximately 28 weeks)

Number of Bleeding Events in Each Category of Hemostatic Efficacy Rating at Resolution of Breakthrough Bleeding Episode

Hemostatic efficacy for treatment of BEs was rated on 4-point Likert scale as: excellent=full relief of pain and cessation of objective signs of bleeding after a single infusion, no additional infusion is required for the control of bleeding and administration of further infusion to maintain hemostasis would not affect the scoring; good=definite pain relief and/or improvement in signs of bleeding after a single infusion, possibly requires more than 2 infusions for complete resolution and administration of further infusion to maintain hemostasis would not affect the scoring; fair=probable and/or slight relief of pain and slight improvement in signs of bleeding after a single infusion, required multiple infusions for complete resolution; none=no improvement of signs or symptoms or conditions worsen. Missing indicates the number of unique bleeding episodes without any overall hemostatic efficacy rating at resolution of breakthrough bleeding episode.

Time frame: Baseline through study completion or ≥50 EDs whichever occurred last (approximately 28 weeks)

Number of Adynovate Infusions Per Bleeding Episode

Time frame: Baseline through study completion or ≥50 EDs whichever occurred last (approximately 28 weeks)

Weight-adjusted Consumption of Adynovate Per Bleeding Episode

Weight-adjusted consumption (IU/kg) was derived as the total units infused (IU) divided by the last available body weight (kg) prior to the infusion.

Time frame: Baseline through study completion or ≥50 EDs whichever occurred last (approximately 28 weeks)

Number of Minor Surgeries With Hemostatic Efficacy Based on Global Hemostatic Efficacy Assessment (GHEA) Score as Assessed by the Operating Surgeon/Investigator

GHEA score consisted of 3 individual rating scales: (1) Intra-operative Efficacy Assessment Scale, (2) Post-operative Efficacy Assessment Scale, and (3) Peri-operative Efficacy Assessment Scale. Each rating scale is based on 4 points scale ranging from: 3 (Excellent), 2 (Good), 1 (Fair), and 0 (None). The scores of 3 individual ratings scales were added together to form a GHEA score. Total score ranged from 0 to 9, where scores evaluate as: excellent (7 to 9), good (5 to 7), fair (3 to 4), and none (0 to 2). For a GHEA score of 7 to be rated "excellent" no individual assessment scores could be less than (\<) 2 and at least 1 assessment score had to be equal to (=) 3; otherwise a score of 7 was rated "good".

Time frame: Baseline through study completion or ≥50 EDs whichever occurred last (approximately 28 weeks)

Volume of Actual and Predicted Intra-operative and Post-operative Blood Loss After the Surgery as Assessed by the Operating Surgeon/Investigator

Time frame: Post-operative: Day 1 and at discharge Week 26

Number of Participants Who Required Perioperative Transfusion of Blood, Red Blood Cells, Platelets, and Other Blood Products

Time frame: Baseline through study completion or ≥50 EDs whichever occurred last (approximately 28 weeks)

Daily Intra-Operative and Post-Operative Weight-Adjusted Consumption Dose of Adynovate

Time frame: Baseline through study completion or ≥50 EDs whichever occurred last (approximately 28 weeks)

Number of Participants With Treatment-emergent Adverse Events (TEAEs) and Serious Treatment-emergent Adverse Events (Serious TEAEs)

An adverse event (AE): any untoward medical occurrence in a participant administered a pharmaceutical product; the untoward medical occurrence 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 it is related to medicinal product. TEAE: any AE either reported for the first time or worsening of a pre-existing event after first dose of study drug and within 30 days of the last administration of study drug. Serious TEAEs: any untoward medical occurrence that: 1) results in death, 2) is life-threatening, 3) requires inpatient hospitalization or prolongation of existing hospitalization, 4) results in persistent or significant disability/incapacity, 5) leads to a congenital anomaly/birth defect in the offspring of the participant or 6) is a medically important.

Time frame: Up to approximately 28 weeks

Number of Participants With Confirmed Inhibitory Antibodies to Factor VIII (FVIII), Binding Immunoglobulin G (IgG) and Immunoglobulin M (IgM) Antibodies to Adynovate and Chinese Hamster Ovary (CHO) Protein

Time frame: Up to approximately 28 weeks

FVIII Activity Level in Plasma Assessed by a 1-stage Clotting Assay

As per planned analysis, data for this outcome measure was collected and reported for initial pharmacokinetic (PK) assessment and second PK assessment. The initial PK assessment was performed prior to the baseline visit at Day -1. The second PK assessment was performed during the Week 20 visit. FVIII activity level reported was corrected for pre-infusion measurement.

Time frame: Day -1 and Week 20: pre-infusion, post-infusion at multiple time-points up to 96 hours

Incremental Recovery Over Time During Adynovate Prophylactic Treatment

Incremental recovery (IR) was calculated as IR (international units per deciliter)/(international units per kilogram \[(IU/dL)/(IU/kg)\] = \[PostFVIII (IU/dL)-PreFVIII (IU/dL)\]/Weight Adjusted Dose (IU/kg).

Time frame: Baseline, Week 6, and Study Completion (approximately Week 28)

Pre-dose Level of FVIII Activity in Plasma

Time frame: Baseline, Weeks 2, 6, 12, and Study Completion (approximately Week 28): Within 30 minutes pre-infusion

Pre-dose Level of FVIII Antigen in Plasma

IU/mL stands for international units per milliliter.

Time frame: Baseline, Weeks 2, 6, 12, 20, and Study Completion (approximately Week 28): Within 30 minutes pre-infusion

Pre-dose Level of Von Willebrand Factor (VWF) Antigen in Plasma

Time frame: Baseline, Weeks 2, 6, 12, 20, and Study Completion (approximately Week 28): Within 30 minutes pre-infusion

Clearance (CL) for FVIII Activity Following an Initial Single Dose and Steady-state Dose of Adynovate

Clearance reported was calculated based on pre-infusion corrected concentration data. As per planned analysis, data for this outcome measure was collected and reported for initial PK assessment and second PK assessment. The initial PK assessment was performed prior to the baseline visit at Day -1. The second PK assessment was performed during the Week 20 visit. \[(dL/h)/kg\] stands for deciliters per hour per kilogram.

Time frame: Day -1 and Week 20: pre-infusion, post-infusion at multiple timepoints up to 96 hours

Volume of Distribution for FVIII Activity Following an Initial Single Dose and Steady-state Dose of Adynovate

Volume of distribution was calculated based on pre-infusion corrected concentration data. As per planned analysis, data for this outcome measure was collected and reported for initial PK assessment and second PK assessment. The initial PK assessment was performed prior to the baseline visit at Day -1. The second PK assessment was performed during the Week 20 visit.

Time frame: Day -1 and Week 20: pre-infusion, post-infusion at multiple timepoints up to 96 hours

Area Under the Concentration Versus Time Curve From 0 to 96 Hours (AUC0-96) for FVIII Activity Following an Initial Single Dose and Steady-state Dose of Adynovate

AUC0-96 was calculated based on pre-infusion corrected concentration data. As per planned analysis, data for this outcome measure was collected and reported for initial PK assessment and second PK assessment. The initial PK assessment was performed prior to the baseline visit at Day -1. The second PK assessment was performed during the Week 20 visit. h\*IU/dL stands for hour\*international units per deciliter.

Time frame: Day -1 and Week 20: pre-infusion, post-infusion at multiple timepoints up to 96 hours

Maximum Concentration (Cmax) for FVIII Activity Following an Initial Single Dose and Steady-state Dose of Adynovate

Cmax was calculated based on pre-infusion corrected concentration data. As per planned analysis, data for this outcome measure was collected and reported for initial PK assessment and second PK assessment. The initial PK assessment was performed prior to the baseline visit at Day -1. The second PK assessment was performed during the Week 20 visit.

Time frame: Day -1 and Week 20: pre-infusion, post-infusion at multiple timepoints up to 96 hours

Pre-dose Concentration (Cpredose) for FVIII Activity Following an Initial Single Dose and Steady-state Dose of Adynovate

Cpredose was calculated based on pre-infusion corrected concentration data. As per planned analysis, data for this outcome measure was collected and reported for initial PK assessment and second PK assessment. The initial PK assessment was performed prior to the baseline visit at Day -1. The second PK assessment was performed during the Week 20 visit.

Time frame: Day -1 and Week 20: pre-infusion, post-infusion at multiple timepoints up to 96 hours

Terminal Phase Elimination Half-life (T1/2) for FVIII Activity Following an Initial Single Dose and Steady-state Dose of Adynovate

T1/2 was calculated based on pre-infusion corrected concentration data. As per planned analysis, data for this outcome measure was collected and reported for initial PK assessment and second PK assessment. The initial PK assessment was performed prior to the baseline visit at Day -1. The second PK assessment was performed during the Week 20 visit.

Time frame: Day -1 and Week 20: pre-infusion, post-infusion at multiple timepoints up to 96 hours