[pubmed] Treatment of refractory myasthenia gravis by double-filtration plasmapheresis and rituximab: A case series of n

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[pubmed] Treatment of refractory myasthenia gravis by double-filtration plasmapheresis and rituximab: A case series of n

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J Clin Apher. 2020 Dec 21. doi: 10.1002/jca.21868. Online ahead of print.

ABSTRACT

INTRODUCTION: Myasthenia gravis (MG) is an autoimmune disease mediated by circulating autoantibodies (anti-AchR, anti-MuSK, etc.). More than 20% of myasthenic patients are refractory to conventional treatments (plasma exchange, IVIg, steroids, azathioprine, mycophenolate mofetil). Rituximab (B-lymphocyte-depleting anti-CD20) and apheresis (double-filtration plasmapheresis [DFPP] and immunoadsorption [IA]) are interesting therapeutic alternatives.

METHODS: This monocentric pilot study included nine refractory myasthenic patients (March 2018 to May 2020) treated by DFPP and/or IA associated with rituximab (375 mg/m2 ). Clinical responses were assessed using the Myasthenia Gravis Foundation of America (MGFA) score.

RESULTS: Average age of patients was 53 ± 17 years. Gender ratio (M/F) was 3:6. The combination of apheresis and rituximab reduced median MGFA score from IV to II after 12 months of follow-up. Clinical improvement assessed by MGFA score was sustained in the long-term for all patients, during an average follow-up of 14 ± 9 months, allowing them to be self-sufficient and out sick-leave. The median number of apheresis sessions was 7 (5-30). The dose of prednisolone was reduced in two patients from 40 mg/d and 30 mg/d to 7.5 mg/d and 10 mg/d, respectively. It was stopped in a patient who was taking 30 mg/d. No infectious, bleeding, or thrombosis complications were noted.

CONCLUSION: The combination of rituximab and DFPP was effective to treat refractory MG.

PMID:33349954 | DOI:10.1002/jca.21868


Source: https://pubmed.ncbi.nlm.nih.gov/3334995 ... 9&v=2.14.1
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