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CSF β-amyloid is not a prognostic marker in multiple sclerosis patients
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International audience. Background: Multiple sclerosis (MS) is the most common chronic inflammatory, demyelinating disorder. Given itsvariable prognosis, the identification of new prognostic biomarkers is needed.Objectives: The aims of our study were to assess the prognostic values of CSF β-amyloid-42 (Aβ42) and β-amyloid40 (Aβ40) levels in MS patients.Methods: Eighty-nine (55 RRMS, 34 PPMS) patients with a recent diagnosis and 27 controls were included in thissingle-centre retrospective study. Clinical, MRI and CSF data have been collected and were analysed to evaluatethe potential value of CSF Aβ42 and Aβ40 levels as MS biomarkers.Results: CSF Aβ levels as well as Aβ42/Aβ40 ratio were identical in MS patients and controls. Although CSF Aβ42and Aβ40 levels were higher in PPMS than in RRMS and in patients with higher EDSS, a multivariate analysisincluding age and EDSS demonstrated that only age of patients was associated with CSF amyloid levels. Additionally, 55 RRMS patients were followed for 3 years. We found no association between baseline amyloid levelsand 3-year disability.Conclusion: Our data do not support an association between CSF amyloid levels and MS status and diseaseseverity. We suggest that CSF amyloid levels are not a prognostic biomarker in recently diagnosed RRMS.
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