Abstract
Ageing is associated with changes in the secretion of adrenal cortical steroids. In the elderly, cortisol secretion increases after stimulation, while the secretion of dehydroepiandrosterone (DHEA) decreases. Each of these hormones influences the age-related processes of energy metabolism, fat depot distribution, immune function and neurodegeneration. In animals the effects of adrenal steroids are dramatic and easily measured. In humans the effects are more subtle. This review summarizes these actions and emphasizes the differences of dosages used in various experimental designs. It is concluded that adrenal hormones may play a significant role in human ageing, but research is hindered because the molecular pathways of DHEA action are not known.
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