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A severe genotype with favourable outcome in very long chain acyl-CoA dehydrogenase deficiency

E H Touma1, M S Rashed, C Vianey-Saban

  • 1Laboratory of Professor Loiselet, Faculty of Medicine, University St Joseph, Damascus Street, PO Box 11-5076, Beirut, Lebanon. loiselet@dm.net.lb

Archives of Disease in Childhood
|December 22, 2000
PubMed

Insights

Very long chain acyl-CoA dehydrogenase (VLCAD) deficiency can cause severe neonatal heart problems. Early diagnosis and dietary management, including medium chain triglycerides and L-carnitine, led to a good outcome with no recurrence.

Area of Science:

  • Biochemistry
  • Genetics
  • Pediatrics

Background:

  • Very long chain acyl-CoA dehydrogenase (VLCAD) deficiency is an inherited metabolic disorder affecting fatty acid oxidation.
  • It can lead to severe cardiac and hepatic manifestations, particularly in the neonatal period.

Observation:

  • A neonate presented with severe cardiomyopathy and was diagnosed with VLCAD deficiency.
  • Genetic analysis revealed homozygosity for a severe mutation, indicating no residual enzyme activity.

Findings:

  • Tandem mass spectrometry of dried blood spots showed elevated long chain acylcarnitines.
  • VLCAD enzyme activity was markedly reduced to 2% of control levels.
  • The patient was managed with a specialized diet including skimmed milk, medium chain triglycerides, and L-carnitine.

Implications:

  • This case highlights the importance of early diagnosis of VLCAD deficiency through newborn screening and biochemical testing.
  • Effective dietary management can prevent acute metabolic decompensation and improve clinical outcomes in affected infants.
  • Understanding genotype-phenotype correlations is crucial for predicting disease severity and guiding treatment strategies.

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