Ambiguous genitalia, impaired steroidogenesis, and Antley-Bixler syndrome in a patient with P450 oxidoreductase deficiency.
(2/9)
Cytochrome P450 oxidoreductase deficiency is a recently established autosomal recessive disease characterised by ambiguous genitalia, impaired steroidogenesis, and skeletal malformations, referred to as Antley-Bixler syndrome. Clinical manifestations in affected patients are highly variable. We report on a girl with P450 oxidoreductase deficiency who presented with virilisation at birth. There was transient maternal virilisation during pregnancy as well. She was initially diagnosed with congenital adrenal hyperplasia caused by 21-hydroxylase deficiency and/or aromatase deficiency. At 1 year of age, skeletal abnormalities suggestive of Antley-Bixler syndrome were detected. Molecular analysis of the fibroblast growth factor receptor 2 (FGFR2) gene was normal but POR gene analysis showed that she was homozygous for an R457H missense mutation. The diagnosis, P450 oxidoreductase deficiency, was confirmed. Results of her endocrine studies and urinary steroid profiling are also presented. (+info)
Impaired hepatic drug and steroid metabolism in congenital adrenal hyperplasia due to P450 oxidoreductase deficiency.
(3/9)
A rare cause of congenital adrenal hyperplasia: Antley-Bixler syndrome due to POR deficiency.
(5/9)
Cytochrome P450 oxidoreductase (POR) deficiency is a recently discovered new variant of congenital adrenal hyperplasia. Distinctive features of POR deficiency are the presence of disorders of sexual development in both sexes, glucocorticoid deficiency and skeletal malformations similar to those observed in the Antley-Bixler syndrome. (+info)
Altered human CYP3A4 activity caused by Antley-Bixler syndrome-related variants of NADPH-cytochrome P450 oxidoreductase measured in a robust in vitro system.
(6/9)