title: [Radioimmunofixation: a new technic for characterizing immunoglobulins in unconcentrated cerebrospinal fluid. Preliminary results].
abstract: The restriction of heterogenicity of immunoglobulins G (IgG), or oligoclonal distribution, in the cerebrospinal fluid (CSF) can be observed after electrophoresis or electrofocalization, the IgG nature of each oligoclonal band being confirmed by subsequent immuno-electrophoresis. Using immunofixation, the oligoclonal bands can be visualized and characterized simultaneously, but requires previous concentration of the CSF, which is a source of error. The technique of radioimmunofixation, here described, allows the study of IgG with 20 microliters of non-concentrated CSF. It demonstrates that the oligoclonal characteristic is present in normal CSF and is a more quantitative than qualitative feature. Preliminary results show that the method can be applied to the study of all CSF proteins. By using a viral antigen labelled with I-125, for example, it should be possible to reveal and visualize the antibody activity of each oligoclonal band and to determine whether the quantitative increase in an oligoclonal band corresponds to a definite antigenic stimulation.
mesh_terms: D006801:Humans; D007074:Immunoglobulin G / Q000134:cerebrospinal fluid; D007136:Immunoglobulins / Q000134:cerebrospinal fluid*; D007457:Iodine Radioisotopes; D011863:Radioimmunoassay / Q000379:methods*
chemical_list: D007074:Immunoglobulin G; D007136:Immunoglobulins; D007457:Iodine Radioisotopes
vernacular_title: Radio-immunofixation: une nouvelle technique de caractérisation des immunoglobulines dans le liquide céphalo-rachidien non concentré. Résultats préliminaires.