NCT03370172

A Study of BAX 888 in Male Adults With Severe Hemophilia A

A Global, Open-Label, Multicenter, Phase 1/2 Study of the Safety and Dose Escalation of BAX 888, an Adeno-Associated Virus Serotype 8 (AAV8) Vector Expressing B-Domain Deleted Factor VIII (BDD-FVIII) in Severe Hemophilia A Subjects Administered a Single Intravenous Infusion

• Status: Completed
• Phase: Phase 1 / Phase 2
• Study type: Interventional
• Enrollment: 4 (actual)
• Sponsor: Baxalta now part of Shire · Industry
• Sex: Male
• Age: 18 Years – 75 Years
• Healthy volunteers: Not accepted

Summary

The main aim of this study is to check if there are side effects from BAX 888 and to determine the dose of BAX 888 for treating severe hemophilia A in male adults. Participants will receive one infusion with BAX 888 at the hemophilia treatment center. During the study, participants will visit their study clinic multiple times.

Detailed description

This study consists of 3 cohorts. Participants will be assigned to 1 of 3 dose cohorts with a minimum of 24 hours between dosing of each participant. Initially, 2 participants will be dosed in a cohort, with up to a total of 5 participants if the cohort is expanded based on safety and activity levels data. Dose escalation: After dosing first 2 participants in cohort 1 the decision will be made on the following: If week 4 FVIII activity levels of both participants are less than (\<) 2%, then dose escalation to cohort 2 will be triggered with no further dosing in cohort 1. If FVIII activity levels \>=2% are observed in at least 1 participant among the 2 participants the decision to escalate dose or expand the cohort with dosing of additional participants will be based on all available data through Week 14. Dose expansion: After dose escalation and administration of BAX 888 to the first 2 participants in 3 cohorts: If sustained Week 14 FVIII activity levels are \>=30% are not achieved in both participants (first 2 participants in cohorts 1 and 2) then escalation to immediate next cohort will be triggered after Data Monitoring Committee (DMC) review of all available safety and FVIII activity levels data. For cohort 3 dosing of additional participants will be paused until further review of available data. If sustained Week 14 FVIII levels are \>=30% in at least 1 of the 2 participants (first 2 participant in cohort 1, 2, 3) then expansion of cohorts 1, 2 (with up to 5 participants), 3 (with up to 3 additional participants) will be initiated with dosing or study could be completed with no further dosing. 23 APRIL 2020: Enrollment of new patients into this study has been paused due to the COVID-19 situation. The duration of this pause is dependent on the leveling and control of the COVID-19 pandemic.

Conditions

• Hemophilia A

Interventions

Type	Name	Description
DRUG	BAX 888	Participants will receive a single peripheral IV infusion of BAX 888 in Cohort 1 and 2 Day 0.

Timeline

• Start date: 2018-02-27
• Primary completion: 2024-07-09
• Completion: 2024-07-09
• First posted: 2017-12-12
• Last updated: 2025-09-11
• Results posted: 2025-09-11

Locations

26 sites across 6 countries: United States, Austria, France, Germany, Hungary, Spain

Regulatory

• FDA-regulated drug study