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Multiple Sclerosis, Vol. 4, No. 1, 22-26 (1998)
DOI: 10.1177/135245859800400106

Intrathecal synthesis of virus-specific oligoclonal IgG, and of free kappa and free lambda oligoclonal bands in acute monosymptomatic optic neuritis. Comparison with brain MRI

Jette L Frederiksen

Department of Neurology, Glostrup University Hospital, 2600 Glostrup, Denmark

Christian JM Sindic

Laboratory of Neurochemistry, Catholic University of Louvain, Cliniques Universitaires Saint-Luc, 53-59 Avenue Mounier, 1200 Brussels, Belgium

Twenty-seven patients with acute monosymptomatic optic neuritis were randomly selected from a population-based cohort of patients extensively screened for known etiologies of ON. Paired serum and CSF obtained median 20 days from onset were examined for oligoclonal IgG, free kappa and free lambda chains, and virus-specific oligoclonal IgG antibodies by an affinity-mediated capillary blot technique. CSF-restricted oligoclonal IgG bands, free kappa and free lambda chain bands were observed in 17, 15 and nine patients, respectively. In addition, 16 patients showed a polyspecific intrathecal synthesis of oligoclonal IgG antibodies against one or more viruses (12 measles, nine varicella zoster, six rubella, six mumps) compared to all the 18 examined patients with definite multiple sclerosis (P=0.0014). The presence of virus-specific oligoclonal IgG was significantly related to the results of oligoclonal IgG (P=0.0034), free kappa chain bands (P=0.0020), and brain MRI abnormalities (P=0.0402). At 1 year follow-up five patients had developed clinically definite multiple sclerosis; all had virus-specific oligoclonal IgG antibodies, oligoclonal IgG and abnormal MRI at onset.

Key Words: intrathecal IgG synthesis • intrathecal immunity • magnetic resonance imaging • multiple sclerosis • neurotropic viruses • oligoclonal bands optic neuritis


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Detection of oligoclonal free kappa chains in the absence of oligoclonal IgG in the CSF of patients with suspected multiple sclerosis
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