Peripheral Inflammatory and Immune Landscape in Multiple System Atrophy: A Cross-Sectional Study

Area of Science:

• Neurology
• Immunology
• Biomarker Discovery

Background:

• Neuroinflammation is implicated in the pathogenesis of multiple system atrophy (MSA).
• Peripheral immune and inflammatory profiles in MSA patients require further clarification.

Purpose of the Study:

• To identify peripheral inflammatory and immune profiles in MSA patients.
• To evaluate their utility as biomarkers for diagnosis and disease monitoring.

Main Methods:

• Cross-sectional study of 235 MSA patients, 240 Parkinson's disease patients, and 235 healthy controls.
• Measurement of peripheral blood inflammatory and immune parameters.
• Correlation analyses between immune markers and clinical characteristics of MSA.

Main Results:

• Significant differences in monocytes, neutrophils-to-lymphocyte ratio (NLR), and mean platelet volume (MPV) between MSA patients and healthy controls.
• Monocytes and uric acid levels differed between MSA and Parkinson's disease patients.
• NLR and MPV combination distinguished MSA patients from controls (AUC=0.824).
• Complement components C3, C4, and immunoglobulin G (IgG) correlated with disease severity scales.

Conclusions:

• Monocytes, NLR, and MPV may serve as potential diagnostic biomarkers for MSA.
• Immune markers including C3, C4, and IgG correlate significantly with MSA disease severity.