Immune dysregulation in mania: A proof-of-concept platelet proteomics study

Area of Science:

• Neuroscience
• Psychiatry
• Proteomics

Background:

• Bipolar disorder (BD) pathophysiology is complex and poorly understood.
• Mania, a key feature of BD, requires further investigation.
• Platelets offer a accessible window into systemic biological changes.

Purpose of the Study:

• To explore platelet proteomic alterations in mania using a data-driven approach.
• To identify biological pathways associated with mania through protein profiling.
• To validate key proteomic findings using ELISA.

Main Methods:

• High-resolution proteomic profiling of platelet samples from patients with severe mania and healthy controls.
• Liquid chromatography-tandem mass spectrometry (LC-MS/MS) for protein quantification.
• Functional enrichment analysis and ELISA validation for immune pathways.

Main Results:

• Mania is associated with proteins involved in immune activation, not cell homeostasis.
• Downregulated proteins in mania predominantly converge on immune-related pathways.
• Deficits in MHC Class I antigen processing and elevated TGF-β levels were observed.

Conclusions:

• Platelet proteomics is a viable tool for psychiatric disorder research.
• Findings suggest immune dysregulation and chronic low-grade inflammation in mania.
• Potential roles for viral and autoimmune mechanisms in BD pathophysiology are indicated.