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  • Title: Folinic acid responsive epilepsy in Ohtahara syndrome caused by STXBP1 mutation.
    Author: Tso WW, Kwong AK, Fung CW, Wong VC.
    Journal: Pediatr Neurol; 2014 Feb; 50(2):177-80. PubMed ID: 24315539.
    Abstract:
    BACKGROUND: Ohtahara syndrome is a severe condition with early onset of recurrent unprovoked seizures associated with abnormal electroencephalography and global developmental delay. Folinic acid-responsive seizures are treatable causes of Ohtahara syndrome, which is thought to be due to recessive mutations in the ALDH7A1 gene, resulting in deficiency of antiquitin. METHOD: Here we report a girl with Ohtahara syndrome who exhibited transient folinic acid responsiveness but without evidence of antiquitin dysfunction. RESULTS: She was later found to have a known missense mutation (c.1439 C > T, p.P480 L) in exon 16 of the STXBP1 gene. CONCLUSION: For infants presenting with Ohtahara syndrome with responsiveness to folinic acid and negative antiquitin deficiency analyses, genetic testing for other possible causative genes such as STXBP1 mutation is recommended.
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