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- W3147565675 abstract "La mise en évidence d’une synthèse intrathécale d’immunoglobulines à partir de la détection de bandes oligoclonales de type immunoglobulines G dans le liquide céphalorachidien par isoélectrofocalisation représente le « gold standard » pour le diagnostic biologique de sclérose en plaques. Cette recherche constitue une aide indiscutable au diagnostic de sclérose en plaques, justifiant son intégration aux critères de McDonald, révisés en 2017. Cette technique est très sensible et spécifique mais elle reste fastidieuse et son interprétation, dépendante de l’opérateur, est parfois difficile. Une alternative consiste à doser les chaînes légères libres kappa et lambda sécrétées par les plasmocytes dans le liquide céphalorachidien et le sérum. Le dosage, effectué par immunonéphélémétrie ou immunoturbidimétrie est quantitatif et plus rapide que la recherche de bandes oligoclonales en s’affranchissant de la subjectivité de lecture. Plusieurs études ont montré des performances équivalentes aux bandes oligoclonales mais d’autres études sont toutefois nécessaires pour confirmer cette approche diagnostique. The demonstration of intrathecal immunoglobulin synthesis by detection of oligoclonal bands in cerebrospinal fluid contributes to the diagnosis of multiple sclerosis as defined in the Mc Donald’s criteria, revised in 2017. Although being considered as a gold standard technique (sensitive and specific) for identifying oligoclonal bands in cerebrospinal fluid, isoelectric focusing remains time-consuming, requires skilled technician and its interpretation is operator-dependent. An alternative lies in measuring κ and λ free light chains, secreted by plasma cells in cerebrospinal fluid and serum. The assay, performed by immunonephelometry or immunoturbidimetry on automated systems, allows a quantitative measurement and is faster than detection of oligoclonal bands. Preliminary studies have shown similar performances of intrathecal κ free light chains measurement as compared to oligoclonal bands results in multiple sclerosis diagnosis. Further large studies in routine practice are now mandatory to confirm the potential of this approach." @default.
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- W3147565675 date "2021-04-01" @default.
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- W3147565675 title "Apport du dosage des chaînes légères libres kappa et lambda dans le diagnostic de la sclérose en plaques" @default.
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