Pyridoxine-dependent seizure (PDS) is a rare disorder characterized by seizures that are resistant to common anticonvulsants, and that are ultimately controlled by daily pharmacologic doses of pyridoxine (vitamin B6). Mutations of the antiquitin gene (ALDH7A1) are now recognized as the molecular basis of cases of neonatal-onset PDS.
Division of Genetics and Developmental Medicine, Department of Pediatrics, University of Washington, and Children's Hospital and Regional Medical Center, Seattle, Washington 98195-6320, USA. cbenet@u.washington.edu