The adrenal and the metabolic syndrome

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Abstract
This review discusses the possible interrelationships between adrenal steroid hormones and the metabolic syndrome. Abnormal regulation of the hypothalamic-pituitary-adrenal axis has been proposed. Studies in the United Kingdom associated the metabolic syndrome with low birth weight and hyperactivity of the entire axis. In Italy, increased pituitary responsiveness to stimulation with vasopressin and corticotrophin-releasing hormone was demonstrated in women with central obesity. Swedish researchers have reported that increased stress responses of the axis correlated with a less variable but decreased cortisol level. An allele of the glucocorticoid receptor was also associated with various components of the metabolic syndrome. Evidence also suggests that central obesity is associated with an increased peripheral conversion of cortisol to cortisone and subsequent feedback stimulation of the axis. On the other hand, central fat may have an increased local metabolism in the direction of cortisol. Roles for dehydroepiandrosterone and aldosterone in the syndrome have also been proposed.

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