Abstract
Cerebrospinal fluid (CSF)samples from 10 patients with Multiple Sclerosis (MS) and 7 with other neurological diseases (OND) were studied in order to detect oligoclonal restriction of IgG subclasses 1,3 and 4. Agarose isoelectric focusing (AGA-IEF) followed by Western capillary blotting and immunoperoxidase staining with specific monoclonal antibodies were used. All MS samples showed oligoclonal IgG1 and 6 of them also had IgG3 or IgG4 bands. In the OND group only patients with subacute sclerosing panencephalitis (SSPE) and Guillain-Barré disease (GBD) showed CSF oligoclonal patterns for IgG subclasses. Our results demonstrate that in MS CSF other IgG subclasses beside IgG1 may display an oligoclonal pattern. The finding of more than one subclass in the same band indicates a microheterogeneous composition of these oligoclonal bands.
Sommario
Allo scopo di rilevare un'eventuale restrizione oligoclonale per le sottoclassi IgG1,3 e 4 sono stati studiati campioni di liquido cerebrospinale (LCS) ottenuti da 10 pazienti con Sclerosi Multipla (SM) definita e da 7 pazienti con altre malattie neurologiche (AMN). La metodica utilizzata è stata l'isoelectric focusing in agarosio seguita da Western capillary blotting su nitrocellulosa e colorazione con immunoperossidasi mediante anticorpi monoclonali. Tutti i campioni di SM mostrarono IgG1 oligoclonali e sei di essi presentarono contemporaneamente bande di IgG3 o di IgG4. Tra le AMN solo i pazienti con Panencefalite Sclerosante Subacuta e sindrome di Guillain-Barré mostrarono bande oligoclonali formate da sottoclassi di IgG. I nostri dati dimostrano che nel LCS di SM altre sottoclassi di IgG, oltre alle IgG1, possono essere oligoclonali. La presenza di più di una sottoclasse nella stessa banda depone per una microeterogeneità di queste bande oligoclonali.
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Grimaldi, L.M.E., Maimone, D., Reggio, A. et al. IgG1,3 and 4 oligoclonal bands in multiple sclerosis and other neurological diseases. Ital J Neuro Sci 7, 507–513 (1986). https://doi.org/10.1007/BF02342029
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DOI: https://doi.org/10.1007/BF02342029