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

This study is currently recruiting participants. (see Contacts and Locations)
Verified January 2015 by Baxter Healthcare Corporation
Information provided by (Responsible Party):
Baxter Healthcare Corporation Identifier:
First received: August 27, 2012
Last updated: January 20, 2015
Last verified: January 2015

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 Baxter Healthcare Corporation:

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 ]

Estimated Enrollment: 16
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.


Ages Eligible for Study:   18 Years to 75 Years
Genders Eligible for Study:   Male
Accepts Healthy Volunteers:   No

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 identifier: NCT01687608

Contact: Siddhesh Darne

United States, California
Children's Hospital Los Angeles Recruiting
Los Angeles, California, United States, 90027
Contact: Guy Young, MD    323-361-5507   
Contact: Geraldine Pira    323-361-5505   
Principal Investigator: Guy Young, MD         
Hemophilia Treatment Center at Orthopaedic Hospital Recruiting
Los Angeles, California, United States, 90007
Contact: Doris Quon, MD    213-742-1402   
Contact: Lucy Lacanilao    213-742-1407   
Principal Investigator: Doris Quon, MD, PhD         
University of California Davis Medical Center Recruiting
Sacramento, California, United States, 95817
Contact: Maricel Miguelino, MD    916-734-7633   
Contact: Thomas Luu, PhD    916-734-3746   
Principal Investigator: Jonathan Ducore, MD         
University of California at San Diego Medical Center Recruiting
San Diego, California, United States, 92103-8651
Contact: Annette von Drygalski, MD    619-471-0335   
Contact: Thomas J. Cramer, PhD    619-471-0421   
Principal Investigator: Annette von Drygalski, MD         
United States, Colorado
U of Colorado School of Medicine, Hemophilia & Thrombosis Treatment Center Recruiting
Aurora, Colorado, United States, 80045
Contact: Marilyn Manco-Johnson, MD    303-724-0365   
Contact: Marilyn Manco-Johnson, MD    303-724-0363      
Principal Investigator: Marilyn Manco-Johnson, MD         
United States, Georgia
Emory University Recruiting
Atlanta, Georgia, United States, 30322
Contact: Kesley D Tyson, MS    404-785-9856   
Contact: Beverly Yandell    404-785-4677   
Principal Investigator: Christine Kempton, MD, MSc         
United States, Illinois
Rush University Medical Center Terminated
Chicago, Illinois, United States, 60612
United States, Minnesota
University of Minnesota Division of Hematology, Oncology, & Transplantation Recruiting
Minneapolis, Minnesota, United States, 55455
Contact: Joni Osip, RN    612-625-1110   
Contact: Charlotte Quinton, RN,BSN,CCRC    612-626-1421   
Principal Investigator: Mark Reding, MD         
United States, New York
Mount Sinai Medical Center Recruiting
New York, New York, United States, 10029
Contact: Christopher Walsh, MD    212-241-3443   
Contact: Johanna McCarthy    212-241-8303   
Principal Investigator: Christopher E Walsh, MD, PhD         
United States, Oregon
The Hemophilia Center, Oregon Health and Science University Recruiting
Portland, Oregon, United States, 97239
Contact: Susan Lattimore, RN    503-418-4495   
Contact: Kathy Beach, RN    530-494-7425   
Principal Investigator: Michael Recht, MD, PhD         
United States, Texas
Gulf States Hemophilia and Thrombosis Center Recruiting
Houston, Texas, United States, 77030
Contact: Miguel Escobar, MD    713-500-8630   
Contact: Madeline Cantini    713-500-8352   
Principal Investigator: Miguel Escobar, MD         
United States, Washington
Puget Sound Blood Center Recruiting
Seattle, Washington, United States, 98104
Contact: Barbara Konkle, MD    206-233-3349   
Contact: Steve Grantham, CRC    206-398-5929   
Principal Investigator: Barbara A Konkle, MD         
Sponsors and Collaborators
Baxter Healthcare Corporation
Study Director: Boyan Litchev, MD Baxter Healthcare Corporation
  More Information

No publications provided

Responsible Party: Baxter Healthcare Corporation Identifier: NCT01687608     History of Changes
Other Study ID Numbers: AskBio009-101
Study First Received: August 27, 2012
Last Updated: January 20, 2015
Health Authority: United States: Food and Drug Administration

Keywords provided by Baxter Healthcare Corporation:
Hemophilia B
factor IX deficiency
gene therapy

Additional relevant MeSH terms:
Hemophilia B
Blood Coagulation Disorders
Blood Coagulation Disorders, Inherited
Coagulation Protein Disorders
Genetic Diseases, Inborn
Genetic Diseases, X-Linked
Hematologic Diseases
Hemorrhagic Disorders processed this record on March 25, 2015