Hyperphenylalaninemia due to dihydropteridine reductase deficiency: diagnosis by measurement of oxidized and reduced pterins in urine.

Abstract:

:Hyperphenylalaninemia due to dihydropteridine reductase deficiency results from the inability to maintain the aromatic amino acid hydroxylase cofactor, tetrahydrobiopterin, in its reduced or active form. Diagnosis of the disease is usually made by direct enzymatic assay on liver biopsies or in cultured skin fibroblasts. Evidence is presented that normal children and classic phenylketonuric children excrete mainly tetrahydrobiopterin in their urines, whereas children with dihydropteridine reductase deficiency excrete only oxidized forms of biopterin. Details of a rapid high performance liquid chromatographic assay for the measurement of the various forms of biopterin in urine are presented. This assay can be used to screen for suspected dihydropterine reductase mutants.

journal_name

Pediatrics

journal_title

Pediatrics

authors

Milstien S,Kaufman S,Summer GK

subject

Has Abstract

pub_date

1980-04-01 00:00:00

pages

806-10

issue

4

eissn

0031-4005

issn

1098-4275

journal_volume

65

pub_type

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