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Immunoglobulin M in the cerebrospinal fluid: an indicator of recent immunological stimulation

M K Sharief1, E J Thompson

  • 1Department of Clinical Neurochemistry, National Hospital for Nervous Diseases, London, UK.

Journal of Neurology, Neurosurgery, and Psychiatry
|August 1, 1989
PubMed

Insights

Detecting oligoclonal immunoglobulin M (IgM) in cerebrospinal fluid (CSF) shows strong correlation with free light chains in neurological conditions like multiple sclerosis. This finding suggests oligoclonal IgM is a significant diagnostic marker.

Area of Science:

  • Neuroimmunology
  • Clinical Chemistry

Background:

  • Intrathecal synthesis of immunoglobulins is crucial in diagnosing central nervous system (CNS) inflammatory diseases.
  • Oligoclonal immunoglobulin M (IgM) detection in cerebrospinal fluid (CSF) has been limited by methodology.

Purpose of the Study:

  • To evaluate a new sensitive method for detecting oligoclonal IgM in unconcentrated CSF.
  • To correlate intrathecal IgM synthesis with free light chains in various neurological conditions.

Main Methods:

  • Development and application of a sensitive assay for oligoclonal IgM detection in CSF.
  • Analysis of CSF samples from patients with multiple sclerosis, CNS infections, and other neurological disorders.

Main Results:

  • A strong correlation was observed between oligoclonal IgM and free light chains in CSF of patients with multiple sclerosis and CNS infections.
  • No oligoclonal IgM response was detected in patients with non-inflammatory or non-infectious neurological conditions.

Conclusions:

  • Intrathecal IgM synthesis is a reliable biomarker in inflammatory neurological diseases.
  • Oligoclonal IgM detection in CSF holds diagnostic significance comparable to free light chains for CNS inflammatory conditions.

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