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- W2413663150 abstract "Natalizumab is a monoclonal antibody that significantly reduces the occurrence of relapses in relapse-remitting multiple sclerosis (RRMS) patients. Early papers on the clinical use of natalizumab in RRMS patients reported erythroblastemia as occasional and transient.to determine the prevalence and absolute count of erythroblasts (nucleated red blood cells, NRBCs) in peripheral blood of RRMS patients in different treatment groups and healthy controls from the same geographic area using the same equipment for laboratory analysis.We retrospectively evaluated the samples of 203 consecutive RRMS patients including 26 subjects on natalizumab, 17 on fingolimod, 72 on interferon, 41 on glatiramer acetate, 47 treatment-naïve and 240 healthy controls from the same geographic area. Blood samples were processed using an XN-9000-Hematology Analyzer and subsequent microscopic verification. In the natalizumab-treated patients we performed an additional analysis in order to detect the expression of CD34+ cells in peripheral blood, as confirmation of a bone marrow mobilization.The prevalence of patients with NRBCs positivity was significantly higher in natalizumab-treated patients (92%) compared with the other treatment groups and healthy controls (0%) (p<0.0005). The median absolute NRBCs count was significantly higher in natalizumab-treated patients (median 0.020, p<0.0005) than in the other treatment groups and healthy controls. Natalizumab-treated patients also had higher levels of white blood cells than all other groups and lower haemoglobin levels than healthy subjects (p<0.01), but no morphologic alterations were evident at a subsequent review of red blood cells, platelets and white blood cells. CD34+ cells levels were consistent with mobilization of haematopoietic stem cells from the bone marrow (median 8 cells/µL, IQR 5-12).We confirm erythroblastaemia as a frequent finding of natalizumab treatment in RRMS patients. More extended knowledge and adequate long-term observation of this phenomenon are essential to better understand any pathological implication." @default.
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- W2413663150 date "2016-07-01" @default.
- W2413663150 modified "2023-09-27" @default.
- W2413663150 title "Erythroblastaemia in natalizumab-treated patients with multiple sclerosis" @default.
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- W2413663150 doi "https://doi.org/10.1016/j.msard.2016.05.020" @default.
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