Abstract
Acute regulation of adrenocorticotropic hormone (ACTH) in cerebrospinal fluid (CSF) by the hypothalamic-pituitary-adrenocortical system has not been investigated in man. In a pilot study in healthy male volunteers we measured ACTH every twenty minutes in serial CSF for three hours after an intravenous placebo, hydrocortisone (100mg) or insulin (2mg/kg) injection. No acute inhibitory or stimulatory effects of these interventions were discovered. Our results corroborate previous findings in rhesus monkeys. The regulation of CSF ACTH and its potential relevance for behavioral alterations in health and disease (e.g. major depression or anorexia nervosa) in humans need further study.
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