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  • Title: Determination of IgG subgroups in cerebrospinal fluid of multiple sclerosis patients and others.
    Author: Eickhoff K, Kaschka W, Skvaril F, Theilkaes L, Heipertz R.
    Journal: Acta Neurol Scand; 1979; 60(5):277-82. PubMed ID: 120670.
    Abstract:
    IgG subgroups (IgG1, IgG2, IgG3, IgG4) were determined by radioimmunoassay (RIA) in cerebrospinal fluid (CSF) of controls, multiple sclerosis (MS), infectious diseases (ID) and other neurological diseases (OND). The proportion of IgG1 in the total IgG subgroup concentration was significantly higher in the MS group compared to the other groups while the IgG2 proportion was significantly lower; IgG3 and IgG4 did not show any consistent change. The inverse relationship between IgG1 and IgG2 was similar in all diagnostic groups: high concentration of IgG1 was associated with low concentrations of IgG2 and vice versa. Patients with a high relative concentration of IgG1 in their CSF have a seven to eight times higher statistical risk to be suffering from MS than ID or OND. In the MS group only the IgG1 concentration correlated with the total IgG concentration determined by radial immunodiffusion, while in controls, ID and OND each IgG subgroup correlated significantly with the IgG concentration. This demonstrates that in MS a selective increase of IgG1 subgroup is mainly responsible for the increase of total IgG, while all subgroups are involved in OND and ID showing an increased total IgG concentration.
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