The objective of this study is to develop a registry of patients with adenosine deaminase severe combined immune deficiency (ADA-SCID) treated with Revcovi™ that contains clinical and biochemical assessments for safety and dose adjustment based on adenosine deaminase (ADA) activity and erythrocyte deoxyadenosine nucleotide (dAXP) levels as well as immunologic monitoring.
Single Arm, Open-Label, Multicenter, Registry Study of Revcovi (Elapegademase-lvlr) Treatment in ADA-SCID Patients Requiring Enzyme Replacement Therapy
Patients with ADA-SCID who require treatment with Revcovi as Enzyme Replacement Therapy (ERT) will be enrolled during a 24-month period and each will be followed for 24 months after starting Revcovi or until undergoing hematopoietic stem cell transplant (HSCT) or hematopoietic stem cell gene therapy (HSC-GT), whichever occurs first. Patients undergoing HSCT or HSC-GT will be followed one month after last Revcovi dose and again at six months to assess adverse events (AEs) and survival. Throughout the duration of the study, patients will be assessed continually for AEs. Patients/Parents/Caregivers will self-administer weekly intramuscular (IM) dose(s) of Revcovi and will be followed according to the Suggested Schedule of Assessments for trough dAXP and ADA activity. Treatment dosing and monitoring will be individualized per provider and patient characteristics in adherence with each study sites' standards of care. Participants in the STP-2279-002 trial will be given the opportunity to enroll in this registry study and proceed to the Treatment Month 6 Visit per the Suggested Schedule of Assessments for Adagen-Transitioning Patients. An interim analysis will be performed approximately two years after study initiation.