Cognitive Impairment in Major Depression

Association with Salivary Cortisol

Kim Hinkelmann*, Steffen Moritz, Johannes Botzenhardt, Kirsten Riedesel, Klaus Wiedemann, Michael Kellner, Christian Otte

*Corresponding author for this work

Research output: Contribution to journalArticle

127 Citations (Scopus)

Abstract

Background: Cognitive deficits and elevated cortisol are hallmarks of depression. Cortisol acts via mineralocorticoid and glucocorticoid receptors, which have their highest density in the hippocampus, a brain area closely related to cognitive function. Several studies have separately examined cortisol secretion and cognitive deficits in depression. However, only few studies have assessed their association in the same patients producing inconclusive results. Methods: We examined 52 medication-free patients with major depression (37 women, 15 men; mean age 35 ± 11 years; Hamilton Depression Scale mean score 27 ± 5) and 50 healthy control subjects, matched for age, gender, and years of education. We applied several neuropsychological tests. Salivary cortisol levels were measured on the same day at 08:00, 12:00, 16:00, and 22:00 hours. Results: Compared with healthy subjects, patients had significantly higher cortisol levels and were impaired in verbal memory, visuospatial memory, working memory, and selective attention. In depressed patients, but not in healthy control subjects, we found a negative correlation between salivary cortisol levels (area under the curve) and hippocampus-related neuropsychological domains (verbal memory, visuospatial memory) and executive function. Conclusions: Cognitive deficits, especially those closely related to hippocampus function, appear to be related to cortisol secretion in depressed patients. Elevated cortisol may downregulate mineralocorticoid and glucocorticoid receptors in the hippocampus, which could, in part, be responsible for cognitive deficits in depressed patients.

Original languageEnglish
Pages (from-to)879-885
Number of pages7
JournalBiological Psychiatry
Volume66
Issue number9
DOIs
Publication statusPublished - 1 Nov 2009
Externally publishedYes

Keywords

  • Cognitive function
  • cortisol
  • depression
  • HPA axis
  • neuropsychology
  • stress

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    Hinkelmann, K., Moritz, S., Botzenhardt, J., Riedesel, K., Wiedemann, K., Kellner, M., & Otte, C. (2009). Cognitive Impairment in Major Depression: Association with Salivary Cortisol. Biological Psychiatry, 66(9), 879-885. https://doi.org/10.1016/j.biopsych.2009.06.023