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Interstitial deletion of 1p22.2p31.1 and medium-chain acyl-CoA dehydrogenase deficiency in a patient with global

Gustavo H B Maegawa1, Nicola K Poplawski, Brage Storstein Andresen

  • 1Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada. gustavo.maegawa@sickkids.ca

American Journal of Medical Genetics. Part A
|May 15, 2008
PubMed

Insights

This study details a rare case of medium chain acyl-CoA dehydrogenase deficiency in a child, caused by a combination of a genetic mutation and a chromosomal deletion on chromosome 1.

Area of Science:

  • Genetics
  • Biochemistry
  • Pediatrics

Background:

  • Medium chain acyl-CoA dehydrogenase deficiency (MCADD) is an inherited metabolic disorder affecting fatty acid oxidation.
  • Early diagnosis and intervention are crucial for managing MCADD symptoms like seizures and developmental delays.

Observation:

  • A 6-year-old girl presented with seizures, developmental delay, and facial dysmorphism.
  • Biochemical analysis indicated MCADD, with a novel ACADM gene mutation identified.
  • Further investigation revealed a 15.5 Mb interstitial deletion on chromosome 1, encompassing the ACADM locus.

Findings:

  • The patient exhibited a unique combination of an ACADM gene mutation and a chromosomal deletion (1p22.2p31.1).
  • This dual genetic anomaly contributed to the patient's fatty acid oxidation defect and clinical presentation.
  • Analysis of similar deletion cases suggests a variable phenotype associated with 1p22 and 1p31/32 deletions.

Implications:

  • This case highlights the importance of comprehensive genomic investigation when initial genetic findings are inconsistent with the clinical picture.
  • It underscores the potential for complex genetic interactions, including chromosomal abnormalities, to cause metabolic disorders.
  • The findings expand our understanding of the genetic basis of fatty acid oxidation defects and their phenotypic variability.

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