Gene Therapy Study in Severe Haemophilia A Patients (270-201)

BioMarin Pharmaceutical

Status and phase: Completed; Phase 2; Phase 1

Conditions: Severe Haemophilia A

Treatments: Biological: valoctocogene roxaparvovec

Study type: Interventional

Funder types: Industry

Identifiers

NCT02576795

BMN 270-201

2014-003880-38 (EudraCT Number)

Details and patient eligibility

About

This study is being conducted by BioMarin Pharmaceutical Inc. as an open label, dose escalation study in order to determine the safety and efficacy of valoctocogene roxaparvovec (an Adenovirus-Associated Virus based gene therapy vector in participants with severe haemophilia A.

Enrollment: 15 patients

Sex: Male

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

1. Males 18 years or older with established severe Haemophilia A (endogenous FVIII level ≤1 IU/dL) as evidenced by their medical history.
2. Treated/exposed to FVIII concentrates or cryoprecipitate for a minimum of 150 exposure days (EDs)
3. Greater than or equal to 12 bleeding episodes for patients on on-demand FVIII replacement therapy over the previous 12 months. Does not apply to patients on prophylaxis
4. No history of inhibitor, and results from a modified Nijmegen Bethesda assay of less than 0.6 Bethesda Units (BU) 2 consecutive occasions at least one week apart within the past 12 months
5. Sexually active patients must be willing to use an acceptable method of contraception.

Exclusion criteria

1. Detectable pre-existing immunity to the AAV5 capsid as measured by AAV5 transduction inhibition or AAV5 total antibodies
2. Any evidence of immunosuppressive disorder or active chronic infection including hepatis B, hepatitis C, HIV
3. Significant liver dysfunction as defined by abnormal elevation ofliver function tests, or for patients who have undergone liver imaging or biopsy and found to have evidence of grade 3 or higher fibrosis
4. Evidence of any bleeding disorder not related to haemophilia A
5. 12. Treatment with any investigational product within 30 days prior to the end of the screening period, or any previous exposure to any gene transfer therapy
6. Any disease or condition that per the physician's discretion would prevent the patient from fully complying with the requirements of the study including possible corticosteroid treatment outlined in the protocol. The physician may exclude patients unwilling or unable to agree on not using alcohol for the 16-week period following the viral infusion.

Trial design

Primary purpose: Treatment

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

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15 participants in 1 patient group

valoctocogene roxaparvovec

Experimental group

Description:

Single administration of valoctocogene roxaparvovec at escalating doses.

Treatment:

Biological: valoctocogene roxaparvovec