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Abstract
Cortisol and adrenocorticotrophic hormone (ACTH) were measured at 2 time points before
the administration of 1 mg of dexamethasone (day 1) and 1 time point on the following
day (day 2). Thirteen severely depressed elderly patients, 15 patients with Alzheimer-type
dementia (ATD), and 16 normal controls were studied. Cortisol was markedly elevated
in depressed patients compared with the other subjects in day 1 samples. Following
dexamethasone, both the depressed and ATD patients showed a similar elevation of cortisol
compared with controls. ACTH concentrations were not significantly different between
the groups before dexamethasone, but were significantly higher in both depressed and
ATD patients after dexamethasone. More depressed patients than ATD patients exhibited
hypersecretion of ACTH after dexamethasone. This implies that ACTH is less responsive
to glucocorticoid feedback in elderly depressed patients, which may be a factor in
causing hypercortisolemia.
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Article info
Publication history
Received in revised form:
March 28,
1987
Received:
October 20,
1986
Identification
Copyright
© 1988 Published by Elsevier Inc.