Alterations in Systemic and Cognitive Glucocorticoid Sensitivity in Depression.

Area of Science:

• Endocrinology
• Neuroscience
• Psychiatry

Background:

• Cortisol insensitivity is a recognized biomarker for depression.
• The impact of cortisol insensitivity on emotional memory biases in depression remains understudied.

Purpose of the Study:

• To investigate the relationship between systemic cortisol insensitivity and cognitive sensitivity to cortisol in premenopausal women with depression.
• To determine if cortisol insensitivity predicts emotional memory biases and the effects of cortisol administration on these biases.

Main Methods:

• Sixty-five premenopausal women underwent a dexamethasone suppression test and participated in memory encoding/recall sessions.
• Participants received oral cortisol (CORT) or placebo before encoding emotionally arousing pictures.
• Cognitive sensitivity to CORT was measured as the change in negative memory bias after CORT versus placebo.

Main Results:

• Cortisol insensitivity correlated with increased depression severity and blunted diurnal cortisol patterns.
• Cortisol insensitivity predicted a negative memory bias during placebo conditions.
• Cortisol administration reduced negative memory bias in individuals with cortisol insensitivity compared to placebo.

Conclusions:

• Findings confirm cortisol insensitivity as a predictor of depression severity and altered diurnal cortisol rhythms.
• Systemic cortisol insensitivity is associated with negative memory bias, which can be mitigated by cortisol administration.
• These results link endocrine and psychological factors in depression, suggesting cortisol augmentation may offer cognitive benefits for affected individuals.