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The syndrome of apparent mineralocorticoid excess (AME) is an inherited form of hypertension in which 11β-hydroxysteroid dehydrogenase (11-HSD) is defective. This enzyme converts cortisol to its inactive metabolite, cortisone. The deficiency allows mineralocorticoid receptors to be occupied by cortisol, because these receptors themselves have similar affinities for cortisol and aldosterone. There...
11β-Hydroxysteroid dehydrogenase (11-HSD) catalyzes the interconversion of cortisol and cortisone. This activity is postulated to protect the type I (mineralocorticoid) receptor from excessive concentrations of cortisol, allowing aldosterone to function as a mineralocorticoid. An enzyme with 11-HSD activity was isolated from rat liver and the corresponding rat and human cDNA and genomic clones isolated...
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