Isolated sulfite oxidase deficiency.

Journal Article (Journal Article)

Isolated sulfite oxidase (SO) deficiency is an autosomal recessively inherited inborn error of sulfur metabolism. In this report of a ninth patient the clinical history, laboratory results, neuropathological findings and a mutation in the sulfite oxidase gene are described. The data from this patient and previously published patients with isolated sulfite oxidase deficiency and molybdenum cofactor deficiency are summarized to characterize this rare disorder. The patient presented neonatally with intractable seizures and did not progress developmentally beyond the neonatal stage. Dislocated lenses were apparent at 2 months. There was increased urine excretion of sulfite and S-sulfocysteine and a decreased concentration of plasma cystine. A lactic acidemia was present for 6 months. Liver sulfite oxidase activity was not detectable but xanthine dehydrogenase activity was normal. The boy died of respiratory failure at 32 months. Neuropathological findings of cortical necrosis and extensive cavitating leukoencephalopathy were reminiscent of those seen in severe perinatal asphyxia suggesting an etiology of energy deficiency. A point mutation that resulted in a truncated protein missing the molybdenum-binding site has been identified.

Full Text

Duke Authors

Cited Authors

  • Rupar, CA; Gillett, J; Gordon, BA; Ramsay, DA; Johnson, JL; Garrett, RM; Rajagopalan, KV; Jung, JH; Bacheyie, GS; Sellers, AR

Published Date

  • December 1996

Published In

Volume / Issue

  • 27 / 6

Start / End Page

  • 299 - 304

PubMed ID

  • 9050047

International Standard Serial Number (ISSN)

  • 0174-304X

Digital Object Identifier (DOI)

  • 10.1055/s-2007-973798


  • eng

Conference Location

  • Germany