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Clin Chem. 1999 Apr;45(4):539-48.

1H-NMR spectroscopy of body fluids: inborn errors of purine and pyrimidine metabolism.

Author information

  • 1Institutes of Neurology and Paediatrics, University Hospital Nijmegen, 6525 GC Nijmegen, The Netherlands. r.wevers@ckslkn.azn.nl

Abstract

BACKGROUND:

The diagnosis of inborn errors of purine and pyrimidine metabolism is often difficult. We examined the potential of 1H-NMR as a tool in evaluation of patients with these disorders.

METHODS:

We performed 1H-NMR spectroscopy on 500 and 600 MHz instruments with a standardized sample volume of 500 microL. We studied body fluids from 25 patients with nine inborn errors of purine and pyrimidine metabolism.

RESULTS:

Characteristic abnormalities could be demonstrated in the 1H-NMR spectra of urine samples of all patients with diseases in the pyrimidine metabolism. In most urine samples from patients with defects in the purine metabolism, the 1H-NMR spectrum pointed to the specific diagnosis in a straightforward manner. The only exception was a urine from a case of adenine phosphoribosyl transferase deficiency in which the accumulating metabolite, 2,8-dihydroxyadenine, was not seen under the operating conditions used. Similarly, uric acid was not measured. We provide the 1H-NMR spectral characteristics of many intermediates in purine and pyrimidine metabolism that may be relevant for future studies in this field.

CONCLUSION:

The overview of metabolism that is provided by 1H-NMR spectroscopy makes the technique a valuable screening tool in the detection of inborn errors of purine and pyrimidine metabolism.

Copyright 1999 American Association for Clinical Chemistry

PMID:
10102915
[PubMed - indexed for MEDLINE]
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