Clinical Exploration of Clinical Exploration Adeno-associated Virus Vector Expression of Human Coagulation Factor VIII Gene Therapy for Hemophilia A
IHBDH-GTHA-2020 is an open- label, non- randomized study to evaluate the safety, tolerability and kinetics of a single intravenous infusion of GS001 in hemophilia A subjects with \<1 IU/dl residual FVIII levels.
• Be able to understand the purpose and risks of the study and provide informed consent according to national and local privacy laws;
• Male subjects and ≥ 18 years of age;
• Have hemophilia A with ≤1 IU/dL (≤1%) endogenous FVIII activity levels at the time of screening. If the screening result is \>1% due to previous treatment with FVIII product, then it may be confirmed by documented historical evidence from a certified clinical laboratory demonstrating ≤1% FVIII activity levels ;
• No history of hypersensitivity or anaphylaxis associated with FVIII product administration;
• Have no measurable FVII inhibitor as assessed by laboratory two times that were at least one week apart; or documented no prior history of FVIII inhibitor after 150 EDs and no clinical signs or symptoms of decreased response to FVIII infusion ;
• Have acceptable laboratory values sampled at screening and repeated prior to Day 0; A. Hemoglobin ≥ 11 g/dL; B. Platelets ≥ 100 x 10\^9/L; C. AST, ALT, alkaline phosphatase ≤ 1.25 upper limit of normal (ULN); D. Bilirubin ≤ 1.25 ULN; E. Creatinine ≤ 2 mg/dL.
• Agree to use reliable barrier contraception until the end of the 52 weeks observation period, and three consecutive semen samples are negative for vector sequences after GS001 infusion.