PMID- 29928654 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20220410 IS - 2328-9503 (Print) IS - 2328-9503 (Electronic) IS - 2328-9503 (Linking) VI - 5 IP - 6 DP - 2018 Jun TI - The impact of rituximab infusion protocol on the long-term outcome in anti-MuSK myasthenia gravis. PG - 710-716 LID - 10.1002/acn3.564 [doi] AB - OBJECTIVE: To evaluate whether the clinical benefit and relapse rates in anti-muscle-specific kinase (MuSK) myasthenia gravis (MG) differ depending on the protocol of rituximab followed. METHODS: This retrospective multicentre study in patients with MuSK MG compared three rituximab protocols in terms of clinical status, relapse, changes in treatment, and adverse side effects. The primary effectiveness endpoint was clinical relapse requiring a further infusion of rituximab. Survival curves were estimated using Kaplan-Meier methods and survival analyses were undertaken using Cox proportional-hazards models. RESULTS: Twenty-five patients were included: 11 treated with protocol 4 + 2 (375 mg/m(2)/4 weeks, then monthly for 2 months), five treated with protocol 1 + 1 (two 1 g doses 2 weeks apart), and nine treated with protocol 4 (375 mg/m(2)/4 weeks). Mean follow-up was 5.0 years (SD 3.3). Relapse occurred in 18.2%, 80%, and 33.3%, and mean time to relapse was 3.5 (SD 1.5), 1.1 (SD 0.4), and 2.5 (SD 1.4) years, respectively. Based on Kaplan-Meier estimates, patients treated with protocol 4 + 2 had fewer and later relapses than patients treated with the other two protocols (log-rank test P = 0.0001). Patients treated with protocol 1 + 1 had a higher risk of relapse than patients treated with protocol 4 + 2 (HR 112.8, 95% CI, 5.7-2250.4, P = 0.002). Patients treated with protocol 4 showed a trend to a higher risk of relapse than those treated with protocol 4 + 2 (HR 9.2, 95% CI 0.9-91.8, P = 0.059). INTERPRETATION: This study provides class IV evidence that the 4 + 2 rituximab protocol has a lower clinical relapse rate and produces a more durable response than the 1 + 1 and 4 protocols in patients with MuSK MG. FAU - Cortes-Vicente, Elena AU - Cortes-Vicente E AD - Neuromuscular Diseases Unit Department of Neurology Hospital de la Santa Creu i Sant Pau Universitat Autonoma de Barcelona Barcelona Spain. AD - Centre for Biomedical Network Research on Rare Diseases (CIBERER) Madrid Spain. FAU - Rojas-Garcia, Ricard AU - Rojas-Garcia R AD - Neuromuscular Diseases Unit Department of Neurology Hospital de la Santa Creu i Sant Pau Universitat Autonoma de Barcelona Barcelona Spain. AD - Centre for Biomedical Network Research on Rare Diseases (CIBERER) Madrid Spain. FAU - Diaz-Manera, Jordi AU - Diaz-Manera J AD - Neuromuscular Diseases Unit Department of Neurology Hospital de la Santa Creu i Sant Pau Universitat Autonoma de Barcelona Barcelona Spain. AD - Centre for Biomedical Network Research on Rare Diseases (CIBERER) Madrid Spain. FAU - Querol, Luis AU - Querol L AD - Neuromuscular Diseases Unit Department of Neurology Hospital de la Santa Creu i Sant Pau Universitat Autonoma de Barcelona Barcelona Spain. AD - Centre for Biomedical Network Research on Rare Diseases (CIBERER) Madrid Spain. FAU - Casasnovas, Carlos AU - Casasnovas C AD - Neuromuscular Diseases Unit Department of Neurology Hospital Universitari de Bellvitge - IDIBELL L'Hospitalet de Llobregat Barcelona Spain. FAU - Guerrero-Sola, Antonio AU - Guerrero-Sola A AD - Neuromuscular Diseases Unit Department of Neurology Hospital Universitario Clinico San Carlos Madrid Spain. FAU - Munoz-Blanco, Jose Luis AU - Munoz-Blanco JL AD - ALS-Neuromuscular Unit Department of Neurology Hospital General Universitario Gregorio Maranon IISGM Madrid Spain. FAU - Barcena-Llona, Jose Eulalio AU - Barcena-Llona JE AD - Department of Neurology Hospital Universitario Cruces Baracaldo Spain. FAU - Marquez-Infante, Celedonio AU - Marquez-Infante C AD - Neuromuscular Diseases Unit Department of Neurology and Neurophysiology Hospital Universitario Virgen del Rocio Sevilla Spain. FAU - Pardo, Julio AU - Pardo J AD - Department of Neurology Hospital Clinico Santiago de Compostela Spain. FAU - Martinez-Fernandez, Eva Maria AU - Martinez-Fernandez EM AD - Department of Neurology Hospital Juan Ramon Jimenez Huelva Spain. FAU - Uson, Mercedes AU - Uson M AD - Department of Neurology Hospital Son Llatzer Palma de Mallorca Spain. FAU - Oliva-Nacarino, Pedro AU - Oliva-Nacarino P AD - Department of Neurology Hospital Universitario Central de Asturias Oviedo Spain. FAU - Sevilla, Teresa AU - Sevilla T AD - Centre for Biomedical Network Research on Rare Diseases (CIBERER) Madrid Spain. AD - Neuromuscular Unit Department of Neurology Hospital Universitari i Politecnic La Fe Valencia Spain. AD - Department of Medicine University of Valencia Valencia Spain. FAU - Illa, Isabel AU - Illa I AD - Neuromuscular Diseases Unit Department of Neurology Hospital de la Santa Creu i Sant Pau Universitat Autonoma de Barcelona Barcelona Spain. AD - Centre for Biomedical Network Research on Rare Diseases (CIBERER) Madrid Spain. LA - eng PT - Journal Article DEP - 20180414 PL - United States TA - Ann Clin Transl Neurol JT - Annals of clinical and translational neurology JID - 101623278 PMC - PMC5989782 EDAT- 2018/06/22 06:00 MHDA- 2018/06/22 06:01 PMCR- 2018/04/14 CRDT- 2018/06/22 06:00 PHST- 2018/02/02 00:00 [received] PHST- 2018/03/07 00:00 [revised] PHST- 2018/03/20 00:00 [accepted] PHST- 2018/06/22 06:00 [entrez] PHST- 2018/06/22 06:00 [pubmed] PHST- 2018/06/22 06:01 [medline] PHST- 2018/04/14 00:00 [pmc-release] AID - ACN3564 [pii] AID - 10.1002/acn3.564 [doi] PST - epublish SO - Ann Clin Transl Neurol. 2018 Apr 14;5(6):710-716. doi: 10.1002/acn3.564. eCollection 2018 Jun.