This is an open-label, single-dose, multi-center, multinational trial to demonstrate the efficacy of AMT-061 and to further describe its safety profile. The study drug is identified as AAV5-hFIXco-Padua (AMT- 061). AMT-061 is a recombinant adeno-associated viral vector of serotype 5 (AAV5) containing the Padua variant of a codon-optimized human FIX complementary deoxyribonucleic acid (cDNA) under the control of a liver-specific promoter. The pharmaceutical form of AMT-061 is a solution for intravenous infusion administered at a dose of 2 x 10^13 gc/kg.



Eligible Ages
Over 18 Years
Eligible Genders
Accepts Healthy Volunteers

Inclusion Criteria

  1. Male
  2. Age ≥18 years
  3. Subjects with congenital hemophilia B, classified as severe or moderately severe, and are currently on factor IX prophylaxis
  4. >150 previous exposure days of treatment with factor IX protein

Exclusion Criteria

  1. History of factor IX inhibitors
  2. Positive factor IX inhibitor test at screening
  3. Select screening laboratory value >2 times upper limit of normal
  4. Positive human immunodeficiency virus (HIV) test at screening, not controlled with anti-viral therapy
  5. Active infection with hepatitis B or C virus at screening
  6. History of Hepatitis B or C exposure, currently controlled by antiviral therapy at the end of the lead-in phase
  7. Previous gene therapy treatment
  8. Receipt of an experimental agent within 60 days prior to screening
  9. Current participation or anticipated participation within one year after study drug administration in this trial in any other interventional clinical trial involving drugs or devices

Study Design

Phase 3
Study Type
Intervention Model
Single Group Assignment
Intervention Model Description
The reference therapy is prophylactic factor IX replacement therapy used during the lead-in phase prior to treatment with AAV5-hFIXco-Padua (AMT-061).
Primary Purpose
None (Open Label)

Arm Groups

ArmDescriptionAssigned Intervention
Single infusion of AMT-061 Subjects will receive a single infusion of AAV5-hFIXco-Padua (AMT- 061) at baseline. After study drug administration (post study drug), subjects will be monitored for tolerance to the study drug and detection of potential immediate AEs at the clinical trial site for a few hours after dosing.
  • Genetic: AAV5-hFIXco-Padua
    Single intravenous infusion of AAV5-hFIXco-Padua (AMT-061)
    Other names:
    • AMT-061

Recruiting Locations

Children's National and nearby locations

Children's National Medical Center Hematology and Oncology
Washington, District of Columbia 20010
Michael Guerrera, MD

More Details

UniQure Biopharma B.V.

Study Contact

Alison Long, MD


Study information shown on this site is derived from ClinicalTrials.gov (a public registry operated by the National Institutes of Health). The listing of studies provided is not certain to be all studies for which you might be eligible. Furthermore, study eligibility requirements can be difficult to understand and may change over time, so it is wise to speak with your medical care provider and individual research study teams when making decisions related to participation.