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Pediatr Res. 1991 Apr;29(4 Pt 1):406-11.

Long-chain 3-hydroxyacyl-CoA dehydrogenase deficiency.

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Department of Clinical Neuroscience, University of Newcastle upon Tyne, United Kingdom.


We describe the clinical features and biochemical findings of two patients with long-chain 3-hydroxyacyl-CoA dehydrogenase deficiency. Both children presented with an acute metabolic crisis. Both had hypoglycemia and excreted even-chain unsubstituted dicarboxylic and 3-hydroxy-dicarboxylic acids in the urine. Measurement of the enzymes of fatty acid oxidation in cultured skin fibroblasts showed low activity of long-chain 3-hydroxyacyl-CoA dehydrogenase, but normal activity of short-chain 3-hydroxyacyl-CoA dehydrogenase. The defect was further characterized by immunoprecipitating the short-chain enzyme using monospecific antibodies. It is probably inherited as an autosomal recessive trait, inasmuch as intermediate enzyme activity was found in the fibroblasts from the parents of one child.

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