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BAX855

Phase 3

Hemophilia A | Monoclonal antibody | Hematology |Takeda Pharmaceutical Company Limited|Trials Updated: Jul 28, 2025

BAX855 development status

Highest phase Phase 3
Registered trials 10 across 2 sponsors since May 2012

BAX855 target and mechanism

ModalityMonoclonal antibody

Also known as ADYNOVATE, PEGylated Recombinant Factor VIII, TAK-660, Recombinant Factor VIII (FVIII) PEGylated

Success Probability

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Market & Valuation

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Trial Design

CONTROLLED
Total Trials5
Total Enrollment540

FDA Designations

No designations recorded

BAX855 clinical trials

BAX855 · 5 trials · 1 indication

Phase 3 5
NCT05707351A Study of Adynovate in Previously Treated Chinese Teenagers and Adults With Severe Hemophilia AHemophilia A
COMPLETED37 Analytics
NCT02585960BAX 855 PK-guided DosingHemophilia A
COMPLETED135 Analytics
NCT02615691A Study of PEGylated Recombinant Factor VIII (BAX855) in Previously Untreated Young Children With Severe Hemophilia AHemophilia A
COMPLETED120 Analytics
NCT01913405Phase 3 Efficacy and Safety Study of BAX 855 in Severe Hemophilia A Patients Undergoing Surgical ProceduresHemophilia A
COMPLETED30 Analytics
NCT01945593BAX 855 ContinuationHemophilia A
COMPLETED218 Analytics
PHASE3COMPLETED
A Study of Adynovate in Previously Treated Chinese Teenagers and Adults With Severe Hemophilia A
Hemophilia AUnlock trial analytics
PHASE3COMPLETED
BAX 855 PK-guided Dosing
Hemophilia AUnlock trial analytics
PHASE3COMPLETED
A Study of PEGylated Recombinant Factor VIII (BAX855) in Previously Untreated Young Children With Severe Hemophilia A
Hemophilia AUnlock trial analytics
PHASE3COMPLETED
Phase 3 Efficacy and Safety Study of BAX 855 in Severe Hemophilia A Patients Undergoing Surgical Procedures
Hemophilia AUnlock trial analytics
PHASE3COMPLETED
BAX 855 Continuation
Hemophilia AUnlock trial analytics

Study Endpoints

Primary Endpoints

Total Annualized Bleeding Rates (ABR)
Baseline through study completion or ≥50 EDs whichever occurred last (approximately 28 weeks)

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.

Percentage of Participants With a Total Annualized Bleeding Rate (ABR) of Zero for Second Six Months
Day 183 to Day 364 (6 months)

Annualized bleeding rate was determined by dividing the number of bleeds by observation period in years.

Number of Participants With FVIII Inhibitor Development
Throughout Part A of the study, approximately 5 years

Number of participants who developed an inhibitor (at any time) confirmed by a central laboratory based on a second repeat blood sample draw within 2 weeks of site notification of an inhibitor and all participants who had not developed an inhibitor and had greater than or equal to (\>=) 100 EDs when the sample for the last valid inhibitor test was drawn.

Number of Participants With Success of Immune Tolerance Induction (ITI)
Up to 33 months in Part B of the study

Success is defined as 1) a persistently negative inhibitor titer less than (\<) 0.6 Bethesda unit (BU), 2) FVIII IR \>=66% of the baseline value following a wash-out period of 84-96 hours, and 3) a FVIII half-life of \>=6 hours.

Global Hemostatic Efficacy Assessment Score (GHEA) - Composed of 3 Individual Ratings
Hemostatic efficacy assessments were performed intraoperatively, postoperatively on day 1 (approximately 24 hours after surgery) and perioperatively at day 14 or discharge (whichever was first).

GHEA=Sum of 1-3 ratings: Excellent: 7-9 (no category \<2), Good: 5-7 (no category \<1), Fair: 3-4 (no category \<1) 1. Intraoperative and 2. Postoperative (postoperative day 1) hemostatic efficacy assessments: Excellent=3: Blood Loss (BL) ≤ than expected for procedure type in non-hemophilic population (NHP) (≤100%), Good=2: BL ≤50% more than expect. for procedure type in NHP (101-150%), Fair=1: BL \>50% more than expect. for procedure type in NHP (\>150%), None=0: Significant bleeding-requiring rescue therapy (RT) 3. Perioperative hemostatic efficacy assessment (day 14 or discharge, whatever is first): Excellent=3: BL and required blood transfusions (BT) less than or similar (≤100%) to that expected for procedure type in NHP, Good=2: BL ≤50% more (101-150%) and BT less than or similar to that expected for procedure type in NHP, Fair=1: BL \>50% more (\>150%) and BT greater than expected in NHP, None=0: Significant bleeding-requiring RT, BT substantially greater than expected in NHP

Number of Participants With Inhibitory Antibodies to Factor VIII (FVIII)
Baseline through end of study (53 months)

Inhibitory antibodies to Factor VIII were measured by the Nijmegen modification of the Bethesda assay. Inhibitors had to be confirmed by 2 separate assessments within a 2 to 4 week period from the central laboratory.

Annualized Bleed Rate (ABR) - Spontaneous Bleeds
Baseline through end of study (53 months)

The ABR was assessed based upon each individual bleeding episode. A bleeding episode was defined as subjective (pain consistent with a joint bleed) or objective evidence of bleeding which may or may not require treatment with FVIII. The ABR of spontaneous bleeds was reported separately for twice weekly, PK-t R, each of the every 5 days and every 7 days treatment regimens at the time of bleed.

Secondary Endpoints

ABR Based on Bleeding Site
Baseline through study completion or ≥50 EDs whichever occurred last (approximately 28 weeks)
ABR Based on Bleeding Cause
Baseline through study completion or ≥50 EDs whichever occurred last (approximately 28 weeks)
Number of Adynovate Infusions Per Week During the Prophylactic Treatment Period
Baseline through study completion or ≥50 EDs whichever occurred last (approximately 28 weeks)
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Adynovate 45±5 IU/kgEXPERIMENTALParticipants received prophylactic treatment with Adynovate (45 \[±5\] IU/kg), infusion, IV, twice weekly, for at least 50 EDs, or approximately 28 weeks.
Pharmacokinetic (PK) evaluation of BAX 855EXPERIMENTALParticipants will first undergo an initial pharmacokinetic (PK) assessment. Following the PK assessment participants will be randomized to one of 2 dosing regimens.
FVIII trough target 1-3%EXPERIMENTALStandard treatment arm - PK-guided dosing schedule to achieve a Factor VIII (FVIII) trough of 1-3%
FVIII trough target 8-12%EXPERIMENTALIntensified treatment arm - PK-guided dosing schedule to achieve a Factor VIII (FVIII) trough of 8-12%
All ParticipantsEXPERIMENTALPreviously Untreated Patients (PUPs) \< 6 years of age with severe hemophilia A (FVIII \< 1%) and \< 3 exposure days (EDs) to ADVATE, BAX 855 or plasma transfusion were enrolled in a single arm group. Part A (Main Study): Participants age \<3 years - who had not experienced two joint bleeds received on-demand treatment of 10-80 international units per kilogram (IU/kg) intravenously (IV) depending on the severity of the bleeding episode; and - who experienced maximum of two joint bleeds received prophylaxis treatment with dose of 25-80 IU/kg of BAX 855 IV (based on investigator discretion) once weekly for up to 100 EDs. Part B (Immune tolerance induction \[ITI\] Portion): Participants who met the pre-defined Part B treatment criteria entered Part B of the study for ITI. Participants either received prophylaxis treatment of BAX 855 low dose 50 IU/kg IV, three times a week or high dose 100-200 IU/kg IV, daily at discretion of the investigator according to the institution's standard of care.
BAX855EXPERIMENTALPre-operative loading dose: Single loading dose, pre-surgery administered based on each study participant's individual PK results as well as target trough level for type and character of surgery, dental or invasive procedure being performed. In general, major surgery will target an 80-150% FVIII trough level, and minor surgery will target an initial 30-100% FVIII trough level. Intra-operative and post-operative dosing of BAX855 must be based on pre-dosage measurements of FVIII and the type and character of the surgery performed.
Fixed BAX855 prophylaxisEXPERIMENTAL45-80 IU/kg twice weekly to once per week.
Pharmacokinetic (PK)-tailored BAX 855 prophylaxisEXPERIMENTALPK-tailored prophylactic BAX855 regimen based on participant's individual PK profile to maintain a Factor VIII (FVIII) trough level

Interventions

NameTypeDescription
AdynovateBIOLOGICALAdynovate 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 \[mL/min\]).
PEGylated Recombinant Factor VIIIBIOLOGICALPharmacokinetic (PK) evaluation
ITIBIOLOGICALImmune tolerance induction therapy
PEGylated Recombinant factor VIII (rFVIII)BIOLOGICALLyophilized powder and solvent for solution for injection
BAX855BIOLOGICALAntihemophilic Factor (Recombinant), PEGylated
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Eligibility Criteria

Age Range12 Years to 65 Years
SexMALE
Healthy VolunteersNo
Study Sites12

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...

Countries:ChinaUnited StatesAustraliaAustriaBulgariaFranceGermanyHong KongHungaryIsraelItalyMalaysiaNorwayPolandRomaniaSingaporeSpainSwedenSwitzerlandTaiwanTurkey (Türkiye)UkraineUnited KingdomBelgiumCanadaDenmarkFinlandNetherlandsSouth KoreaThailandLithuaniaRussiaCzechiaJapan
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Frequently asked questions about BAX855

What is BAX855 used for?

BAX855 is being developed for the treatment of hemophilia A, a bleeding disorder. It is a monoclonal antibody studied in a Phase 3 clinical program in patients with hemophilia A. Takeda Pharmaceutical Company Limited is the developer.

Who is developing BAX855?

BAX855 is being developed by Takeda Pharmaceutical Company Limited, which trades under the ticker TAK. Takeda is the sponsor of the clinical program evaluating BAX855 in hemophilia A.

What phase is BAX855 in?

BAX855 is in Phase 3 clinical development for hemophilia A. It is an investigational monoclonal antibody and has not been approved by the FDA. The Phase 3 program includes one completed trial.

What clinical trials is BAX855 in?

BAX855 has been studied in the Phase 3 trial NCT01945593, titled BAX 855 Continuation. That trial enrolled 218 participants with hemophilia A and is completed. It ran across the United States, Australia, Austria, Bulgaria, Czechia, Germany, Hong Kong, Israel, Japan, Lithuania, Malaysia, Netherlands, Poland, Romania, Russia, South Korea, Spain, Sweden, Switzerland, Taiwan, Turkey, Ukraine, and the United Kingdom.

How many patients were enrolled in BAX855 trials?

The BAX855 clinical program enrolled 218 participants in total, all in the Phase 3 trial NCT01945593. That study was a controlled trial in hemophilia A and is now completed.