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Case Reports
Journal Article
Worsening of Seizures After Asparagine Supplementation in a Child with Asparagine Synthetase Deficiency.
Pediatric Neurology 2016 May
OBJECTIVE: Asparagine synthetase deficiency is an autosomal recessive neurometabolic disorder characterized clinically by severe congenital microcephaly, global developmental delay, intractable epilepsy, and motor impairment in the form of spastic quadriparesis. Diagnosis is confirmed by findings of low cerebral spinal fluid or plasma asparagine in addition to a mutation of the subsequently in ASNS gene. There is no documented trial of asparagine as a treatment for this disorder.
PATIENT DESCRIPTION: We present a child with asparagine synthetase deficiency whose mental status improved slightly from a vegetative state to a minimally conscious state after starting asparagine supplementation. He subsequently became irritable, developed sleep disturbance, and experienced worsening seizures, requiring discontinuation of the asparagine supplements.
CONCLUSIONS: Asparagine supplementation may be not effective in controlling the seizures in asparagine synthetase deficiency, and it is likely to make them worse.
PATIENT DESCRIPTION: We present a child with asparagine synthetase deficiency whose mental status improved slightly from a vegetative state to a minimally conscious state after starting asparagine supplementation. He subsequently became irritable, developed sleep disturbance, and experienced worsening seizures, requiring discontinuation of the asparagine supplements.
CONCLUSIONS: Asparagine supplementation may be not effective in controlling the seizures in asparagine synthetase deficiency, and it is likely to make them worse.
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