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  • Title: Oligoclonal free kappa and lambda bands in the cerebrospinal fluid of patients with multiple sclerosis and other neurological diseases. An immunoaffinity-mediated capillary blot study.
    Author: Sindic CJ, Laterre EC.
    Journal: J Neuroimmunol; 1991 Jul; 33(1):63-72. PubMed ID: 1829093.
    Abstract:
    We describe an affinity-mediated capillary blotting technique for the detection of free kappa or lambda light chains in native cerebrospinal fluid (CSF) after isoelectric focusing in agarose gel. Interferences by light chains bound to immunoglobulins were carefully excluded. An absolute amount of 20-50 ng of free kappa or lambda Bence-Jones proteins were detectable by this method, under the form of several discrete bands with isoelectric points between 5 and 8.5. No free light chains were observed in CSF and sera from patients without neurological disorders (n = 26). Such bands were present in most CSF samples in the case of central nervous system (CNS) infections, except in aseptic meningitis. In a group of 48 multiple sclerosis (MS) patients, 44 (92%) displayed oligoclonal free kappa bands restricted to the CSF; oligoclonal IgG bands were observed in 40 cases, and oligoclonal free lambda bands in 33. In this group, the presence of CSF free light chain bands was highly correlated with their absolute levels (p less than 0.001). In other neurological diseases (n = 44), oligoclonal free kappa and free lambda bands were detected much more rarely, in seven (16%) and four (9%) cases respectively. Surprisingly, the CSF from three unrelated patients with Huntington's disease (out of five tested) contained both oligoclonal IgG and free kappa bands.
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