Damage-associated molecular patterns and immune activation in bipolar disorder

Area of Science:

• Neuroimmunology
• Molecular Psychiatry

Background:

• Immune activation is frequently observed in bipolar disorder (BD).
• Damage-associated molecular patterns (DAMPs) are critical mediators of immune responses.
• Understanding DAMPs in BD may offer therapeutic targets.

Purpose of the Study:

• To investigate serum levels of DAMPs in drug-free patients with BD during acute mood episodes.
• To compare DAMP levels between BD patients, healthy controls, and sepsis patients.

Main Methods:

• Serum samples were collected from drug-free BD patients (n=20) during acute episodes.
• Healthy subjects (n=20) served as negative controls.
• Sepsis patients (n=20) served as positive controls for immune activation.

Main Results:

• All assessed DAMPs significantly differed between groups (P < 0.0006).
• BD patients exhibited higher levels of circulating cell-free nuclear DNA, HSP70, and HSP90α versus healthy controls.
• BD patients showed lower levels of ccf nDNA, HSP60, HSP70, and HSP90α but higher ccf mitochondrial DNA versus sepsis patients.

Conclusions:

• Observed DAMP profiles in BD patients correlate with known inflammatory activity.
• These findings suggest potential for targeted and personalized treatments for acute BD episodes.
• DAMPs may serve as biomarkers for immune dysregulation in bipolar disorder.