Subjective mild depressive symptoms are associated with abnormal diurnal cycle of salivary cortisol in older adults
- PMID: 20558832
- DOI: 10.1177/0891988710373599
Subjective mild depressive symptoms are associated with abnormal diurnal cycle of salivary cortisol in older adults
Abstract
Background: Alterations in cortisol secretion pattern seem to be involved in the associations between aging, depression, and cognitive decline.
Objective: The aim of this study was to mainly assess cortisol circadian profile in older adults with subjective depressive symptoms.
Methods: Salivary cortisol samples from healthy young (n = 22) and old adults (n = 22), and from older adults who self-reported depressive symptoms in Geriatric Depression Scale (n = 22) were collected at 7 AM, 4 PM, and 10 PM and were analyzed by radioimmunoassay.
Results: Older adults with depressive symptoms presented the characteristic cortisol circadian pattern, but they showed higher cortisol levels at 10 PM than healthy young and elderly controls.
Conclusions: Our data suggest that mild depressive symptoms could be associated with a cortisol secretion pattern previously described as being predictive of cognitive decline.
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