Dose-finding Study of SPK-8016 Gene Therapy in Patients With Hemophilia A to Support Evaluation in Individuals With FVIII Inhibitors

  • End date
    Dec 23, 2023
  • participants needed
  • sponsor
    Spark Therapeutics
Updated on 23 March 2022
gene therapy
Factor VIII


SPK-8016 is in development for the treatment of patients with inhibitors to FVIII. This Phase 1/2, open-label, non-randomized, dose-finding study is part one of a planned two part study of SPK-8016. Part one will evaluate the safety, efficacy, and tolerability of SPK-8016 in adult males with clinically severe hemophilia A and no measurable inhibitor against FVIII. Data obtained from Part 1 will inform the study design and dose selection for Part 2 in patients with FVIII inhibitors.

Condition Adeno-Associated Virus (AAV), Blood Coagulation Disorder, Blood Coagulation Disorders, Inherited, Coagulation Protein Disorders, Factor VIII (FVIII), Factor VIII (FVIII) Deficiency, Factor VIII (FVIII) Gene, Factor VIII (FVIII) Protein, Genetic Diseases, Inborn, Genetic Diseases, X-Linked, Gene Therapy, Gene Transfer, Hematologic Diseases, Hemorrhagic Disorders, Recombinant, Vector, Inhibitors
Treatment SPK-8016
Clinical Study IdentifierNCT03734588
SponsorSpark Therapeutics
Last Modified on23 March 2022


Yes No Not Sure

Inclusion Criteria

Be male and ≥18 years of age
Have clinically severe hemophilia A, defined as
<1% (<1 IU/dL) endogenous FVIII activity levels as historically documented by a certified laboratory or screening data results; OR
1-2% (1-2 IU/dL) endogenous FVIII activity levels and > 10 bleeding events per year (in the last 52 weeks prior to screening); OR
1-2% (1-2 IU/dL) endogenous FVIII activity levels and on prophylaxis
Have had >150 exposure days (EDs) to any recombinant and/or plasma-derived FVIII
concentrates or cryoprecipitates
Have no prior history of hypersensitivity or anaphylaxis associated with any FVIII or IV immunoglobulin administration
Have no measurable inhibitor against FVIII as assessed by central laboratory, have no confirmed history of clinically significant FVIII inhibitor, and no clinical signs or symptoms of decreased response to FVIII administration (Note: family history of inhibitors will not exclude study participation)
Agree to use reliable barrier contraception after the administration of SPK-8016 until notified by the Investigator

Exclusion Criteria

Have active hepatitis B or C
Have significant underlying liver disease
Have serological evidence of HIV-1 or HIV-2 with CD4 counts ≤200/mm3. Participants who are HIV-positive and stable, with an adequate CD4 count (>200/mm3) and undetectable viral load, and are on an antiretroviral drug regimen are eligible to enroll
Have detectable antibodies reactive with AAV-Spark capsid
Have history of chronic infection or other chronic disease
Have been dosed in a previous gene therapy research trial within the last 52 weeks or with an investigational drug within the last 12 weeks
Any concurrent clinically significant major disease (such as liver abnormalities or type I diabetes) or other condition that, in the opinion of the Investigator and/or Sponsor, makes the subject unsuitable for participation in the study
Unable or unwilling to comply with the schedule of visits and study assessments described in the clinical protocol
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Additional screening procedures may be conducted by the study team before you can be confirmed eligible to participate.

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If you are confirmed eligible after full screening, you will be required to understand and sign the informed consent if you decide to enroll in the study. Once enrolled you may be asked to make scheduled visits over a period of time.

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Complete your scheduled study participation activities and then you are done. You may receive summary of study results if provided by the sponsor.

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