AN OPEN-LABEL, NON-INVESTIGATIONAL PRODUCT, LEAD-IN STUDY TO EVALUATE AT LEAST 6 MONTHS OF PROSPECTIVE EFFICACY AND SAFETY DATA OF FACTOR IX OR FACTOR VIII PROPHYLAXIS REPLACEMENT THERAPY IN THE USUAL CARE SETTING OF MODERATELY SEVERE TO SEVERE ADULT HEMOPHILIA B SUBJECTS (FIX:C≤2%) WHO ARE NEGATIVE FOR nAb TO AAV VECTOR-SPARK100 AND MODERATELY SEVERE TO SEVERE HEMOPHILIA A ADULT SUBJECTS (FVIII:C≤1%) WHO ARE NEGATIVE FOR nAb TO AAV VECTOR SB-525 CAPSID (AAV6), PRIOR TO THE RESPECTIVE THERAPEUTIC PH 3 GENE THERAPY STUDIES (See Detailed Description Section for Official Protocol Title)

Study Summary

To establish baseline prospective efficacy data of current FIX prophylaxis replacement therapy in the usual care setting of hemophilia B subjects, who are negative for nAb to AAV-Spark100, prior to the Phase 3 gene therapy study. To establish baseline prospective efficacy data of current FVIII prophylaxis replacement therapy in the usual care setting of hemophilia A subjects, who are negative for nAb to AAV6, prior to the Phase 3 gene therapy study. The enrollment for hemophilia A participants is completed. At this time participants are only being enrolled for hemophilia B cohort.

Interventions

Study Locations

Official Trial Information