NMR-based urinalysis for beta-ketothiolase deficiency.

Area of Science:

• Biochemistry
• Metabolomics
• Pediatric Medicine

Background:

• Beta-ketothiolase deficiency is a rare inborn error of metabolism impacting isoleucine catabolism.
• It presents as severe ketoacidosis in children aged 6-24 months, necessitating prompt diagnosis.
• Current diagnostics rely on mass spectrometry and genetics, with limited focus on NMR spectroscopy.

Observation:

• A case study involved a 1-year-old boy with vomiting, impaired consciousness, and ketoacidosis.
• NMR urinalysis revealed elevated levels of butanone, tiglylglycine, and ketones.
• Molecular genetic studies confirmed the diagnosis of beta-ketothiolase deficiency.

Findings:

• NMR-based urinalysis effectively identified disease-specific markers like butanone.
• NMR analysis proved complementary to traditional organic acid analysis.
• The NMR procedure is rapid, with automated acquisition typically under 15 minutes.

Implications:

• NMR urinalysis offers a simple, fast, and complementary diagnostic tool for beta-ketothiolase deficiency.
• Increased availability of NMR analysis in clinical labs could enhance acute pediatric care.
• Early and accurate diagnosis via NMR can lead to timely interventions and improved patient outcomes.