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Medium-chain acyl-CoA dehydrogenase deficiency: Molecular aspects

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Abstract

Medium-chain acyl-CoA dehydrogenase (MCAD) deficiency is an autosomal recessive disorder which is known to cause Reye-like syndrome in children and sudden infant death. A point mutation of lysine329-to-glutamic acid329 substitution in the MCAD gene was recently identified as the most common mutation in patients with MCAD deficiency. This mutation is responsible for about 90% of mutant MCAD alleles in Caucasians. Patients with this type of mutation have a variety of symptoms, indicating that the clinical heterogeneity of MCAD deficiency may not be caused entirely by genetic heterogeneity. Screening for the mutation among newborns in England, Australia, and United States of America indicates the prevalence of carriers to be 1 in 40–107, suggesting the high incidence of the mutation. Since presymptomatic diagnosis and appropriate dietary management are important in MCAD deficiency to prevent life-threatening complications, the relatively high incidence of this disorder may warrant population screening. The most common MCAD mutation can now be detected by DNA diagnostic methods using Guthrie cards. This makes it possible to screen a population efficiently for this potentially fatal disorder.

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Abbreviations

MCAD:

medium-chain acyl-CoA dehydrogenase

PCR:

polymerase chain reaction

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Matsubara, Y., Narisawa, K. & Tada, K. Medium-chain acyl-CoA dehydrogenase deficiency: Molecular aspects. Eur J Pediatr 151, 154–159 (1992). https://doi.org/10.1007/BF01954373

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