Childhood trauma dependent anxious depression sensitizes HPA axis function

Area of Science:

• Neuroscience
• Psychiatry
• Immunology

Background:

• Anxious depression, a severe major depressive disorder (MDD) subtype, has unclear hypothalamic-pituitary-adrenal (HPA) axis regulation.
• Childhood adversity is a known risk factor for MDD and impacts HPA axis function.

Purpose of the Study:

• Investigate glucocorticoid receptor (GR) function in anxious depression.
• Examine the influence of childhood adversity on GR function in anxious depression.

Main Methods:

• 144 depressed patients were assessed for anxious depression using the Hamilton Depression Rating Scale (HAM-D).
• HPA axis function and immune response were measured via cortisol, ACTH, and leukocyte counts after dexamethasone suppression test.
• Childhood Trauma Questionnaire (CTQ) evaluated childhood adversity.
• FKBP5 mRNA expression and genotype were analyzed in a subgroup.

Main Results:

• Anxious depression (54.2% of patients) presented with greater severity and poorer outcomes.
• Patients with anxious depression reported higher rates of sexual abuse and emotional neglect.
• Anxious depressed patients exhibited enhanced GR-induced FKBP5 mRNA expression and reduced cortisol levels, partly linked to sexual abuse.
• Sexual abuse was associated with an enhanced GR-induced leukocyte response.

Conclusions:

• Anxious depression, particularly when associated with childhood trauma, involves heightened HPA axis and immune system sensitivity.
• These findings suggest that HPA axis and immune system modulation could be therapeutic targets for anxious depression with childhood adversity.