Phase 1 Study of GC1130A in Patients With Sanfilippo Syndrome Type A (MPS IIIA)

Inclusion Criteria: * Participants with documented MPS IIIA diagnosis * Participants aged ≥ 12 months and ≤ 18 years Exclusion Criteria: * Participants with significant non-MPS IIIA related central nervous system impairment * Participants with previous complication from intraventricular drug administration * Participants with contraindications for MRI scans and for neurosurgery * Participants that received treatment with any investigational drug or a device intended as a treatment for MPS IIIA within 30 days or 5 half-lives prior to the study * Participants that received a hematopoietic stem cell or bone marrow transplant or received gene therapy