title: 3-hydroxyacyl-coenzyme a dehydrogenase deficiency: identification of a new mutation causing hyperinsulinemic hypoketotic hypoglycemia, altered organic acids and acylcarnitines concentrations.
abstract: The human HADH gene encodes the short-chain-L-3-hydroxyacyl-CoA dehydrogenase, the enzyme which catalyzes the third step of the β-oxidation of the fatty acids in the mitochondrial matrix. Loss-of-function mutations in the HADH gene lead to short-chain-L-3-hydroxyacyl-CoA dehydrogenase deficiency, an autosomal recessive genetic defect of unknown prevalence with a wide spectrum of phenotypic variability. As in other metabolic diseases, the diagnostic relevance of the biochemical evaluations, plasma acylcarnitines, and urinary organic acids, are crucially dependent on the clinical conditions of the patient during specimen collection.This paper describes the eighth patient carrying a HADH gene mutation, a new homozygous deletion c.565delG leading to an early stop codon (p.V116Wfs124X), in an infant with hyperinsulininemic hypoglycemia, displaying abnormal patterns of plasma acylcarnitines and urinary organic acids. We conclude that, when the residual catalytic activity of the mutated enzyme is seriously reduced, the biochemical hallmarks of the disease, namely plasma 3-hydroxybutyrylcarnitine and urinary 3-hydroxyglutaric acid, are invariably present.
authors: Department of Life Sciences and Reproduction, Division of Pediatrics, University of Verona, P.le L.A. Scuro 10, 37134, Verona, Italy.
authors: Florina Ion
authors: FI
authors: Popa
authors: Silvia
authors: S
authors: Perlini
authors: Francesca
authors: F
authors: Teofoli
authors: Daniela
authors: D
authors: Degani
authors: Silvia
authors: S
authors: Funghini
authors: Giancarlo
authors: G
authors: La Marca
authors: Piero
authors: P
authors: Rinaldo
authors: Monica
authors: M
authors: Vincenzi
authors: Franco
authors: F
authors: Antoniazzi
authors: Attilio
authors: A
authors: Boner
authors: Marta
authors: M
authors: Camilot