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Cognition and HPA axis reactivity in mildly to moderately depressed outpatients. A case-control study

Tidsskriftartikel - 2012

Resume

Background: Patients with depression display neurobiological changes of the hypothalamic-pituitary axis as well as cognitive disturbances. Aims: To assess any association between hypothalamus-pituitary-adrenal (HPA) axis reactivity and memory-related cognitive functions. Methods: Depressed outpatients (n =?83, ICD-10) were group-matched to healthy controls (n =?33), and tested on a number of cognitive domains. Salivary samples were collected at awakening, 30 min later and at 22:00 h. At 23:00 h, the participants ingested 1.0 mg of dexamethasone, and three saliva samples were collected the following day at the same times. Results: Patients and controls did not differ on any memory-related cognitive skills. After dexamethasone the cortisol level was 1.7 nmol/l higher (95% CI 0.0-2.8, P =?0.05) in depressed patients compared with controls. In the control group, but not in the patients, a positive association between post-DST cortisol and Rey's Complex figure test (1.3; 95% CI 0.3-3.6; P =?0.02) was found. We found no significant associations between other memory functions and cortisol measures. Conclusions: Contrary to our hypothesis, we found a positive association between cortisol levels after dexamethasone and visuo-spatial memory primarily driven by the healthy controls. Otherwise, no association were found between HPA axis reactivity and memory-related cognitive function.

Reference

Krogh J, Videbech P, Renvillard S, Garde AH, Jørgensen MB, Nordentoft M. Cognition and HPA axis reactivity in mildly to moderately depressed outpatients. A case-control study. Nordic Journal of Psychiatry 2012;66(6):414-421.
doi: 10.3109/08039488.2012.665081

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