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Serum oligoclonal IgG is a common and persistent finding in multiple sclerosis, and has a systemic source
1National Hospital for Neurology and Neurosurgery, Institute of Neurology, London, UK.
QJM : Monthly Journal of the Association of Physicians
|March 1, 1996
Summary
Oligoclonal Immunoglobulin G (IgG) in the serum is common in multiple sclerosis patients, indicating a systemic immune disturbance. This serum response is linked to increased central nervous system activity and disease progression.
Area of Science:
- Neuroimmunology
- Immunogenetics
Background:
- Oligoclonal Immunoglobulin G (IgG) synthesis in the central nervous system (CNS) is a hallmark of multiple sclerosis (MS).
- The presence and significance of serum oligoclonal IgG in MS patients remain less explored.
Purpose of the Study:
- To investigate the occurrence and origin of serum oligoclonal IgG in multiple sclerosis (MS) patients.
- To determine the clinical significance of serum oligoclonal bands in MS.
Main Methods:
- Detection of oligoclonal IgG bands in serum and cerebrospinal fluid using electrophoresis.
- Quantitative analysis of intrathecal IgG synthesis.
- Correlation of serum oligoclonal bands with clinical parameters and autoantibodies.
Main Results:
- Serum oligoclonal IgG was detected in 44% of MS patients versus 7% of healthy controls.
- Evidence suggests a systemic origin for serum oligoclonal IgG, with shared clones between serum and CNS.
- Serum oligoclonal bands correlated with elevated intrathecal synthesis, older age, later disease onset, and serum autoantibodies.
Conclusions:
- The presence of serum oligoclonal IgG is a significant finding in multiple sclerosis.
- Serum oligoclonal IgG suggests a systemic immune response and disturbance in MS.
- Serum oligoclonal bands may serve as a biomarker for disease activity and progression.