MT2018-46: Longterm Follow-up of Subjects with Cerebral Adrenoleukodystrophy who were Treated with Lenti-D Drug Product
This is a multi-center, long-term safety and efficacy follow-up study for subjects with cerebral adrenoleukodystrophy (CALD) who have received Lenti-D Drug Product in parent clinical studies. Lenti-D Drug Product is defined as an autologous CD34+ cell-enriched population that contains cells transduced with Lenti-D lentiviral vector encoding the human adrenoleukodystrophy protein. In parent studies, male subjects with CALD are infused on a single occasion with Lenti-D Drug Product, and then followed for 24 (±1) month for safety and efficacy. The US Food and Drug Administration (FDA) and European Medicines Agency (EMA) recommend long-term follow-up for subjects treated with gene therapy drug products to monitor for selected adverse events (AEs), as well as durability of clinical response. Therefore, after subjects have completed the parent clinical studies, they will be asked to participate in a long-term follow-up Study LTF-304, in which they will be followed every 6 months through 5 years post-drug product infusion, and then annually through 15 years post-drug product infusion. Safety evaluations will include documentation of drug product-related AEs, all serious adverse events (SAEs) regardless of attribution to the drug product, CALD-related ≥Grade 2 AEs, and integration site analysis for the detection of clonal dominance through 15 years post drug product infusion, as well as archiving for RCL testing through 5 years post‑drug product infusion. Efficacy evaluations will include CALD disease-specific assessments, primarily major functional disabilities and brain MRI, with additional exploratory assessments for change in Loes score, Loes pattern, neurologic function score (NFS), very long chain fatty acids (VLCFA), intelligence quotient (IQ), and health related quality of life (HRQoL) assessment. To monitor pharmacodynamics, vector copy number in peripheral blood (PB VCN; vector copies per diploid genome [c/dg]) and transgenic protein expression of adrenoleukodystrophy protein (ALDP) in peripheral blood will be measured at designated study visits. There is no designated Data Monitoring Committee (DMC) for Study LTF-304; however, the review of safety data for this study, including AEs, SAEs and relevant laboratory values, may be performed by the DMC convened for the parent study in which the subject(s) originally participated.
• Provision of written informed consent for this study by the participant or participant's parent(s)/ legal guardian(s) and written informed assent by participant, if applicable
• Have received Lenti-D Drug Product in a parent clinical study
• Able to comply with study requirements
• There are no exclusion criteria for this Study
Cerebral Adrenoleukodystrophy (CALD), Adrenoleukodystrophy (ALD), X-Linked Adrenoleukodystrophy (X-ALD)
Adrenoleukodystrophy, X-linked Adrenoleukodystrophy, Hematopoietic Stem Cells