Context: The pathophysiological importance of glucocorticoids (GCs) is exemplified by patients with Cushing's syndrome who develop hypertension, obesity, and insulin resistance. At a cellular level, availability of GCs to the glucocorticoid and mineralocorticoid receptors is controlled by the isoforms of 11beta-hydroxysteroid dehydrogenase (11beta-HSD). In liver and adipose tissue, 11beta-HSD1 converts endogenous, inactive cortisone to active cortisol but also catalyzes the bioactivation of the synthetic prednisone to prednisolone.
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