Inborn Errors of Metabolism with Consequences for Bile Acid Biosynthesis: A Minireview

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Abstract
Five inborn errors with consequences for bile acid biosynthesis have been described: 7-dehydro- cholesterol 7-reductase deficiency, 3-hydroxysteroidAs-oxidoreductase/isomerase deficiency. 3-0×0- Δ4-steroid 5β-reductase deficiency, sterol 27-hydroxylase deficiency (cerebrotendinous xanthomatosis). and peroxisomal disease(s) with absence of peroxisomes. Diagnosis and treatment of these very rare disorders are discussed. Bile acid therapy is important in most of these disorders, and in the case of 3β hydroxysteroid AS-oxidoreductase/isomerase deficiency and 3-0×0-A4-steroid 5Preductase deficiency such therapy may save the life of the affected cholestatic infant. In the case of sterol 27-hydroxylase deficiency, early treatment with chenodeoxycholic acid may prevent the development of progressive neurological dysfunction, dementia, and ataxia. In the latter three cases early diagnosis and treatment is of utmost importance.

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