Elevated interleukin-17 and reduced testosterone in bipolar disorder. Relation with suicidal behaviour.

Area of Science:

• Neuroendocrinology
• Psychiatry
• Immunology

Background:

• Hormonal imbalances and inflammation are implicated in bipolar disorder (BD) and suicidal behavior.
• Testosterone, a key hormone, and interleukin-17 (IL-17), a pro-inflammatory cytokine, are potential biomarkers.

Purpose of the Study:

• To investigate testosterone and IL-17 levels in patients with bipolar disorder in remission.
• To examine the association between these biomarkers and suicidal behavior in BD patients.

Main Methods:

• A case-control study involving 41 patients with BD in remission and 41 age-matched healthy controls.
• Measurement of serum testosterone and IL-17 levels using standardized assays.
• Statistical analysis to compare levels between groups and correlate with clinical parameters, including suicidal behavior.

Main Results:

• Bipolar disorder patients exhibited significantly reduced testosterone levels and significantly increased IL-17 levels compared to controls.
• A negative correlation was observed between IL-17 and testosterone (r = -0.368, p = 0.018).
• IL-17 positively correlated with disease duration (r = 0.382, p = 0.014).
• Neither testosterone nor IL-17 levels showed a significant association with suicidal behavior in the studied BD patients.

Conclusions:

• Bipolar disorder in remission is characterized by altered testosterone and IL-17 levels.
• These hormonal and inflammatory markers are not directly associated with suicidal behavior in this patient cohort.
• Further research is needed to elucidate the role of these biomarkers in the pathophysiology of bipolar disorder.