This study examines a gene therapy called TSHA-102 in female patients with classic Rett syndrome caused by a loss-of-function mutation in the MECP2 gene. It enrolls female participants with a documented MECP2 mutation and a diagnosis of classic/typical Rett syndrome. The study is in Phase 3 and is currently recruiting participants.
The summary above is a plain-language rendering of the official record. The original English title is shown for reference.
Criteria are reproduced from the ClinicalTrials.gov record in the original English. Only the trial team can determine eligibility.
Inclusion Criteria: * Females between the ages of 12 and \<22 in Part A (closed) and females between the ages of 6 and \<22 in Part B (pivotal cohort). * Participant has a clinical diagnosis of classic/typical Rett syndrome with a documented pathogenic mutation of the methyl-CpG-binding protein 2 (MECP2) gene that results in loss of gene function. * Participants must be willing to receive blood or blood products for the treatment of an AE if medically needed. * Participants and parent/caregiver must agree to reside within easy access to the study site prior to the baseline visit and at least 3 months after TSHA-102 treatment Exclusion Criteria: * Participant has another neurodevelopmental disorder independent of the MECP2 loss-of-function mutation, or any other genetic syndrome with a progressive course. * Participant has a history of brain injury that causes neurological problems or had grossly abnormal psychomotor development in the first 6 months of life. * Participant has a diagnosis of atypical Rett syndrome or a MECP2 gene mutation that does not cause Rett syndrome. * Participant requires invasive ventilatory support. Note: Other protocol defined inclusion/exclusion criteria may apply