Open-Label Single Ascending Dose of Adeno-associated Virus Serotype 8 Factor IX Gene Therapy in Adults With Hemophilia B

This study is ongoing, but not recruiting participants.
Sponsor:
Information provided by (Responsible Party):
Baxalta US Inc.
ClinicalTrials.gov Identifier:
NCT01687608
First received: August 27, 2012
Last updated: August 10, 2016
Last verified: August 2016
  Purpose
The purpose of this study is to evaluate the safety of single ascending IV doses of a Factor IX (FIX) Gene Therapy in up to 16 Adults with Hemophilia B.

Condition Intervention Phase
Hemophilia B
Biological: AskBio009
Phase 1
Phase 2

Study Type: Interventional
Study Design: Endpoint Classification: Safety Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: A Phase 1/2 Open-Label, Single Ascending Dose Trial of a Self-Complementing Optimized Adeno-associated Virus Serotype 8 Factor IX Gene Therapy (AskBio009) in Adults With Hemophilia B

Resource links provided by NLM:


Further study details as provided by Baxalta US Inc.:

Primary Outcome Measures:
  • Number of patients experiencing treatment-related adverse events by dose group [ Time Frame: Infusion to Week 3 and Infusion to end of study ] [ Designated as safety issue: Yes ]
  • Change from baseline in clinical laboratory evaluations [ Time Frame: Change from baseline at week 3 and change from baseline at the end of study ] [ Designated as safety issue: Yes ]

Secondary Outcome Measures:
  • Changes from Baseline in FIX activity levels, FIX protein levels, and Bleeding Episode Severity & Frequency [ Time Frame: At multiple timepoints from pre-dose through up to 5 years post-dose ] [ Designated as safety issue: Yes ]
  • Immune Response to AskBio009 [ Time Frame: At multiple timepoints from pre-dose through up to 5 years post-dose ] [ Designated as safety issue: Yes ]
  • Detection of AskBio009 genomes in blood, saliva, urine, stool, and semen [ Time Frame: At multiple timepoints from pre-dose through up to 1 years post-dose ] [ Designated as safety issue: Yes ]

Enrollment: 30
Study Start Date: September 2012
Estimated Study Completion Date: November 2029
Estimated Primary Completion Date: November 2019 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: AskBio009 Dose Escalation
Single Dose of a Self-Complementing Optimized Adeno-associated Virus (AAV) Serotype 8 Factor IX Gene Therapy
Biological: AskBio009
Single dose IV injection
Other Name: BAX 335

Detailed Description:
Hemophilia B is a genetic X-linked bleeding disorder caused by a deficiency in blood-clotting Factor IX (FIX) activity. FIX is synthesized in the liver and circulates in the blood as a proenzyme. Current treatment for hemophilia B is based on replacement of the deficient FIX with IV injections of recombinant FIX protein prophylactically or as needed to treat bleeding episodes. This clinical program will test a gene transfer approach involving the use of a gene delivery vector carrying a FIX gene. This first-in-humans study is intended to evaluate the safety, kinetics, and if possible, the dose of AskBio009 required to achieve stable plasma FIX activity between 10% and 40% of normal activity.
  Eligibility

Ages Eligible for Study:   18 Years to 75 Years   (Adult, Senior)
Genders Eligible for Study:   Male
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • Males age 18-75 years, inclusive
  • Established hemophilia B with ≥3 hemorrhages per year requiring treatment with exogenous FIX OR use of FIX prophylaxis because of history of frequent bleeding episodes
  • Plasma FIX activity ≤2% (<1% for first cohort; then per protocol)
  • Negative for active Hepatitis C virus (HCV), defined as Hepatitis C virus antibody negative and negative (undetectable) PCR test for plasma Hepatitis C virus ribonucleic acid (RNA) OR if Hepatitis C virus antibody positive must have ≥2 consecutive negative (undetectable) PCR tests for plasma HCV RNA at least 3 months apart, and negative at screening

Exclusion Criteria:

  • Family history of inhibitor to FIX protein or personal laboratory evidence of having developed inhibitors to FIX protein at any time (>0.6 Bethesda Units on any single test)
  • Documented prior allergic reaction to any FIX product
  • Detectable AAV8 neutralizing antibodies
  • Markers of hepatic inflammation or overt or occult cirrhosis as evidenced by one or more of the following:

    • Platelet count <175,000/μL
    • Albumin ≤3.5 g/dL
    • Total bilirubin >1.5 x ULN and direct bilirubin ≥0.5 mg/dL
    • Alkaline phosphatase >2.0 x ULN
    • ALT or AST >2.0 x ULN (except for subjects who are HIV infected)
    • Liver biopsy in the past indicating moderate or severe fibrosis (Metavir staging of 2 or greater)
    • History of ascites, varices, variceal hemorrhage or hepatic encephalopathy
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT01687608

Locations
United States, California
Orthopaedic Hemophilia Treatment Center
Los Angeles, California, United States, 90007
Children's Hospital Los Angeles
Los Angeles, California, United States, 90027
University of California Davis Medical Center
Sacramento, California, United States, 95817
University of California at San Diego Medical Center
San Diego, California, United States, 92103-8651
United States, Colorado
U of Colorado School of Medicine, Hemophilia & Thrombosis Treatment Center
Aurora, Colorado, United States, 80045
United States, Georgia
Emory University
Atlanta, Georgia, United States, 30322
United States, Illinois
Rush University Medical Center
Chicago, Illinois, United States, 60612
United States, Massachusetts
Children's Hospital of Boston
Boston, Massachusetts, United States, 022105
United States, Minnesota
University of Minnesota, Masonic Clinical Research Unit, Clinical and Translational Science Institute
Minneapolis, Minnesota, United States, 55455
United States, New York
Mount Sinai Medical Center
New York, New York, United States, 10029
United States, Oregon
The Hemophilia Center, Oregon Health and Science University
Portland, Oregon, United States, 97239
United States, South Carolina
Medical University of South Carolina
Charleston, South Carolina, United States, 29425
United States, Texas
Gulf States Hemophilia and Thrombosis Center
Houston, Texas, United States, 77030
United States, Washington
Bloodworks Northwest
Seattle, Washington, United States, 98104
United States, Wisconsin
BloodCenter of Wisconsin
Milwaukee, Wisconsin, United States, 53226
Sponsors and Collaborators
Baxalta US Inc.
Investigators
Study Director: John Chapin, MD Baxalta US Inc.
  More Information

Responsible Party: Baxalta US Inc.
ClinicalTrials.gov Identifier: NCT01687608     History of Changes
Other Study ID Numbers: AskBio009-101 
Study First Received: August 27, 2012
Last Updated: August 10, 2016
Health Authority: United States: Food and Drug Administration

Keywords provided by Baxalta US Inc.:
Hemophilia B
factor IX deficiency
gene therapy

Additional relevant MeSH terms:
Hemophilia A
Hemophilia B
Blood Coagulation Disorders, Inherited
Blood Coagulation Disorders
Hematologic Diseases
Coagulation Protein Disorders
Hemorrhagic Disorders
Genetic Diseases, Inborn
Genetic Diseases, X-Linked

ClinicalTrials.gov processed this record on August 23, 2016