title: Ascorbic acid and amino acid values in the aqueous humor of a patient with Lowe's syndrome.
abstract: BACKGROUND
  Aminoaciduria is found in Lowe's syndrome. No studies of concentrations of ascorbic acid and amino acids in the aqueous humor of the syndrome have been performed. We examined these concentrations in a patient with Lowe's syndrome.
  
  
  METHODS
  Ascorbic acid and amino acid levels in the aqueous humor and plasma of a male infant were measured by means of high-performance liquid chromatography. The patient, who had congenital cataract, miotic pupils, opaque corneas, glaucoma, aminoaciduria, normal levels of ascorbic acid and amino acid in the plasma, and renal tubular acidosis, underwent trabeculotomy, lensectomy, and anterior vitrectomy in both eyes.
  
  
  RESULTS
  Intraocular pressure in both eyes decreased to within the normal range, but both corneas remained opaque. The amino acid levels in the aqueous humor were similar to those in the plasma, but intracameral ascorbic acid levels were decreased. After topical instillation of ascorbic acid, the corneas became transparent. The proband's mother had good visual acuity but paracentral lens opacities in both eyes. His maternal grandmother had scattered cortical opacities in both lenses.
  
  
  CONCLUSIONS
  In this infant with Lowe's syndrome, we found intracameral levels of amino acids similar to those in the plasma. Levels of ascorbic acid in the aqueous humor were decreased.
authors.affiliation: Department of Ophthalmology, Toyama Medical and Pharmaceutical University, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Hayasaka
authors.forename: T
authors.initials: T
authors.lastname: Yamada
authors.forename: K
authors.initials: K
authors.lastname: Nitta
authors.forename: Y
authors.initials: Y
authors.lastname: Kaji
authors.forename: S
authors.initials: S
authors.lastname: Hiraki
authors.forename: K
authors.initials: K
authors.lastname: Tachinami
authors.forename: M
authors.initials: M
authors.lastname: Matsumoto
authors.forename: S
authors.initials: S
authors.lastname: Yamamoto
authors.forename: S
authors.initials: S
authors.lastname: Yamamoto
mesh_terms: D000293:Adolescent; D000596:Amino Acids / Q000378:metabolism*; D001082:Aqueous Humor / Q000378:metabolism*; D001205:Ascorbic Acid / Q000378:metabolism*; D002387:Cataract Extraction; D002648:Child; D002675:Child, Preschool; D002851:Chromatography, High Pressure Liquid; D005260:Female; D006801:Humans; D007223:Infant; D007429:Intraocular Pressure; D008297:Male; D009800:Oculocerebrorenal Syndrome / Q000235:genetics / Q000378:metabolism* / Q000601:surgery; D010375:Pedigree; D014821:Vitrectomy
chemical_list: D000596:Amino Acids; D001205:Ascorbic Acid