- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01620801
Hemophilia B Gene Therapy With AAV8 Vector
A Phase 1 Safety Study in Subjects With Severe Hemophilia B (Factor IX Deficiency) Using a Single-Stranded, Adeno-Associated Pseudotype 8 Viral Vector to Deliver the Gene for Human Factor IX
Study Overview
Detailed Description
Hemophilia B is a bleeding disease in males due to very low levels of coagulation factor IX (FIX) in the blood. The major effect on health is joint disease caused by repeated bleeds into joints like the knee, hip, ankles and elbows. Rarely, the disease causes death due to bleeding into the brain or other important organs. The current treatment is intravenous injection of FIX clotting factor concentrates, in response to bleeding. This study will focus on the severe, most common type of hemophilia B.
This study plans to use a virus called adeno-associated virus (AAV), which in nature causes no disease, and can be engineered to deliver the human FIX gene (AAV8-hFIX19 vector) to liver cells, where FIX is normally made. Medical researchers in the United States and England have recently used an AAV vector similar to the one planned for this study, and found that after a single intravenous injection of the vector, blood levels of FIX reached levels greater than 1%, high enough to change the course of disease from severe to moderate. This means that the need to take FIX clotting factor concentrates has decreased, or even stopped. While these are important results, it needs to be noted that two of the six subjects who received the vector at higher doses developed inflammation of the liver. These subjects were treated with a steroid medication called Prednisolone, which is commonly used for serious types of inflammation. Prednisolone seemed to decrease the liver inflammation, as measured by a decrease in blood levels of elevated liver enzymes, and stability of FIX levels at greater than 1% of normal.
This study will use the AAV8-hFIX19 vector. The vector will be injected once into a peripheral vein of each subject, while the subject is in the hospital. If everything is fine, the subject will be discharged from the hospital the next day. Three doses of vector (low, middle, and high) will be tested in up to 15 different subjects, depending on safety outcome (as determined by blood and urine tests) and results of FIX levels. If some subjects develop liver inflammation, a short, tapering course of corticosteroids will be used.
Study Type
Enrollment (Actual)
Phase
- Phase 1
Contacts and Locations
Study Locations
-
-
New South Wales
-
Camperdown, New South Wales, Australia
- Royal Prince Alfred Hospital
-
-
-
-
Pennsylvania
-
Philadelphia, Pennsylvania, United States, 19104
- The Children's Hospital of Philadelphia
-
Pittsburgh, Pennsylvania, United States, 15213
- University of Pittsburgh
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Willingness to adhere to the clinical protocol and 15-year long-term follow-up as evidenced by written informed consent
- Adult males at least 18 years of age
- A. Severe FIX deficiency (<1% normal circulating FIX) or B. Moderately severe FIX deficiency (1-2% normal circulating FIX, inclusive) and a severe bleeding phenotype as defined by at least one of the following: i. On prophylaxis for a history of bleeding or ii. On demand therapy with a current or past history of frequent bleeding [4 or more bleeding episodes in the last 12 months or chronic hemophilic arthropathy (pain, joint destruction, and loss of range of motion) in one or more joints]
- No history of inhibitor against FIX
- No history of an allergic reaction or anaphylaxis to FIX products
- Greater than 20 exposure days of treatment with FIX protein
- Anti-AAV8 neutralizing titer measured at < 1:5
- Acceptable laboratory values: hemoglobin ≥ 11% gm; WBC ≥ 3,500/μL; platelets ≥ 100,000/μL; AST, ALT, alkaline phosphatase ≤ 2x ULN; bilirubin ≤ 1.2 gm/dL; and creatinine ≤ 1.5 gm/dL
- Subject agrees to use barrier contraception until at least two consecutive semen samples after vector administration are negative for vector sequences (may be for up to several months)
Exclusion Criteria:
- Subjects with active hepatitis B or C, and HBsAg or HCV RNA viral load positivity, respectively. Negative viral assays in two samples, collected at least six months apart, will be required to be considered negative. Both natural clearers and those who have cleared HCV on antiviral therapy are eligible.
- Subjects currently on antiviral therapy for hepatitis B or C
- Subjects with significant underlying liver disease, as defined by presence of portal hypertension, splenomegaly, varices, ascites, edema, gastrointestinal bleeding, encephalopathy, reduction below normal limits of serum albumin, or prior liver biopsy demonstrating significant fibrosis, specifically ≥ Metavir 3 fibrosis
- Subjects with serological evidence of HIV who have CD4 counts ≤ 200/mm3. Subjects who are HIV-positive and stable, with an adequate CD4 count (> 200/mm3) and undetectable viral load (< 50 gc/mL) measured twice in the six months prior to enrollment, on an antiretroviral drug regimen are eligible to enroll.
- History of inhibitor against FIX
- Anti-AAV8 antibody titers ≥ 1:5
- History of chronic infection or other chronic diseases which the investigators consider to constitute an unacceptable risk
- Subjects who have participated in a previous gene therapy research trial within one year of enrollment
- Subjects who have participated in a clinical study with an investigational drug within six months of enrollment
- Any other condition that would not allow the potential subject to complete follow-up examinations during the course of the study or, in the opinion of the investigator, makes the potential subject unsuitable for the study
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Non-Randomized
- Interventional Model: Single Group Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Low dose
AAV8-hFIX19
|
One-time IV vector administration.
|
Experimental: Middle dose
AAV8-hFIX19
|
One-time IV vector administration.
|
Experimental: High dose
AAV8-hFIX19
|
One-time IV vector administration.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Number of subjects with adverse events related to investigational product
Time Frame: One year (with 15-year follow-up)
|
Physical exams; clinical labs, including evaluation of FIX inhibitor; and adverse event reporting.
|
One year (with 15-year follow-up)
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Circulating plasma factor IX levels
Time Frame: One year (with 15-year follow-up)
|
Factor IX activity and antigen; PT; and aPTT.
|
One year (with 15-year follow-up)
|
Collaborators and Investigators
Sponsor
Collaborators
Investigators
- Study Director: Clinical Director, Spark Therapeutics
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- AAV8-hFIX19-101
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
Clinical Trials on Hemophilia B
-
Catalyst BiosciencesCompletedHemophilia A | Hemophilia B | Hemophilia A With Inhibitor | Hemophilia B With Inhibitor | Hemophilia A Without Inhibitor | Hemophilia B Without InhibitorBulgaria, Russian Federation
-
BayerCompletedHemophilia A; Hemophilia BIsrael
-
American Thrombosis and Hemostasis NetworkTakeda; CSL Behring; OctapharmaCompletedHemophilia A | Hemophilia B | Hemophilia | Hemophilia A With Inhibitor | Haemophilia | Hemophilia B With Inhibitor | Haemophilia A Without Inhibitor | Haemophilia B Without InhibitorUnited States
-
American Thrombosis and Hemostasis NetworkGenentech, Inc.Active, not recruitingHemophilia A With Inhibitor | Hemophilia B With Inhibitor | Haemophilia A Without Inhibitor | Haemophilia B Without InhibitorUnited States
-
University College, LondonRecruiting
-
University of British ColumbiaBiogenCompletedHemophilia A, Congenital | Hemophilia B, CongenitalCanada
-
Laboratoire français de Fractionnement et de BiotechnologiesLFB USA, Inc.CompletedA Phase III Study on the Safety, Pharmacokinetics and Efficacy of Coagulation Factor VIIa (PERSEPT2)Hemophilia A With Inhibitors | Hemophilia B With InhibitorsBulgaria, Ukraine, Czechia, United States, Georgia, South Africa
-
Suzhou Alphamab Co., Ltd.RecruitingHemophilia A With Inhibitor | Hemophilia B With InhibitorChina
-
AryoGen Pharmed Co.CompletedHemophilia A With Inhibitor | Hemophilia B With InhibitorIran, Islamic Republic of
-
Chia Tai Tianqing Pharmaceutical Group Co., Ltd.UnknownHemophilia A With Inhibitor | Hemophilia B With InhibitorChina
Clinical Trials on AAV8-hFIX19
-
Opus Genetics, IncRecruiting
-
BiogenCompletedX-Linked Retinitis PigmentosaUnited States, United Kingdom
-
Selecta Biosciences, Inc.National Human Genome Research Institute (NHGRI)SuspendedMethylmalonic Acidemia (MMA)United States
-
REGENXBIO Inc.RecruitingDuchenne Muscular DystrophyUnited States
-
Baxalta now part of ShireTerminatedHemophilia BTurkey, Spain
-
Chigenovo Co., LtdRecruitingBietti's Crystalline DystrophyChina
-
NightstaRx Ltd, a Biogen CompanyEnrolling by invitationChoroideremia | X-Linked Retinitis PigmentosaUnited States, United Kingdom, Netherlands, Germany, France, Brazil, Canada, Denmark, Finland
-
W. Michael HootenNational Institute on Drug Abuse (NIDA)Recruiting
-
National Institute of Allergy and Infectious Diseases...Active, not recruitingHIV-1 Infected Adults With Controlled ViremiaUnited States
-
Baxalta now part of ShireTakeda Development Center Americas, Inc.; Baxalta Innovations GmbH, now part...Active, not recruitingHemophilia AUnited States, Spain, Hungary, Italy, Germany, Austria, France