for males ages 18 years and up (full criteria)
study started
estimated completion



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.


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 Hemostatic Disorders Hemophilia A Blood Coagulation Disorders Disease SPK-8016


You can join if…

Open to males ages 18 years and up

for Part 1:

  1. Be male and ≥18 years of age;
  2. Have clinically severe hemophilia A, defined as:
  3. <1% (<1 IU/dL) endogenous FVIII activity levels as historically documented by a certified laboratory or screening data results; OR
  4. 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
  5. 1-2% (1-2 IU/dL) endogenous FVIII activity levels and on prophylaxis;
  6. Have had >150 exposure days (EDs) to any recombinant and/or plasma-derived FVIII concentrates or cryoprecipitates
  7. Have no prior history of hypersensitivity or anaphylaxis associated with any FVIII or IV immunoglobulin administration
  8. 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)
  9. Agree to use reliable barrier contraception after the administration of SPK-8016 until notified by the Investigator.

You CAN'T join if...

for Part 1:

  1. Have active hepatitis B or C
  2. Have significant underlying liver disease.
  3. 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
  4. Have detectable antibodies reactive with AAV-Spark capsid
  5. Have history of chronic infection or other chronic disease
  6. 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
  7. 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;
  8. Unable or unwilling to comply with the schedule of visits and study assessments described in the clinical protocol.


  • Orthopaedic Institute for Children accepting new patients
    Los Angeles California 90007 United States
  • Children's Hospital Los Angeles accepting new patients
    Los Angeles California 90027 United States


accepting new patients
Start Date
Completion Date
Spark Therapeutics
Phase 1/2 research study
Study Type
Expecting 30 study participants
Last Updated