Background: Major depression in young women is often comorbid with borderline personality disorder (BPD); however, adrenal steroids and pro-inflammatory cytokines in patients with comorbid current major depressive disorder and BPD (MDD/BPD) have not been systematically examined. Therefore, our study aimed at examining serum profiles of cortisol, cytokines, and the cortisol/dehydroepiandrosterone (cortisol/DHEA) ratio in MDD/BPD patients and a healthy comparison group.
Methods: Twelve medication-free female patients with MDD/BPD and 12 healthy women were included. Serum profiles of cortisol, DHEA, tumor necrosis factor-alpha (TNF-alpha), interleukin-6 (IL-6), and interleukin-1beta were sampled, and the molar cortisol/DHEA ratio was determined.
Results: Concentrations of serum cortisol, TNF-alpha, and IL-6, as well as the cortisol/DHEA ratios were significantly increased in MDD/BPD patients as compared with the healthy comparison group.
Conclusions: Depressed patients with comorbid BPD display endocrine and immune alterations similar to those observed in cases of melancholic MDD without BPD. Elevated concentrations of serum cortisol, cortisol/DHEA ratios, and pro-inflammatory cytokines might indicate a state marker in these patients and might contribute to long-term metabolic alterations that have also been associated with MDD.