We investigated whether cerebrospinal fluid (CSF) analysis may differentiate between relapsing-remitting (RR) and secondary progressive (SP) multiple sclerosis (MS). In 17 RR and 16 SP patients we determined: albumine CSF/PB ratio; mononuclear cell (MNC) number, CD4+, CD8+, and B1+ subsets, CD4+/CD8+ ratio; IgG, IgG index, IgM, IgM index, complement components C3 and C4, and C3 and C4 indexes; myelin basic protein; neuron-specific enolase (NSE); S100; and lactate. For each parameter the statistical distance was calculated. Then, using linear discriminant analysis, we computed a discriminant score, including only variables with a P value less than or equal to 0.15: albumin CSF/PB ratio, MNC number, IgM, IgM index, C3, C4, NSE, S100, and lactate. The discriminant score allocated all 17 RR patients to the RR group and 15 of 16 SP patients to the SP group. We conclude that RR and SP MS patients differ with respect to CSF profile and that in individual patients a composite CSF score may differentiate between RR and SP MS.
There is an evident need for a quantitative laboratory marker for ascertaining disease activity and treatment effects in multiple sclerosis (MS) patients. Activity of the disease process in MS is accompanied by myelin breakdown and appearance of myelin basic protein (MBP) in cerebrospinal fluid (CSF). In this paper MBP in CSF of relapsing-remitting (RR) MS patients is reviewed. MBP in CSF is a fragment containing an epitope corresponding to amino acid residues 45-89 of the native molecule. From several relevant studies about CSF MBP in RR MS the following relations can be concluded: CSF MBP levels in active MS patients are frequently increased (45-100%), remain increased until 5 to 6 weeks after onset symptoms and are higher in polysymptomatic exacerbations and correlate with number of gadolinium-enhanced (Gd) lesions on MRI, severity of relapses, EDSS score and CSF intrathecal IgM synthesis. After an intravenous methylprednisolone treatment the increased CSF MBP levels return to normal values and reduction in CSF MBP is related to reduction in EDSS score, number of Gd lesions and CSF intrathecal IgM synthesis.
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