2020
Monovalent IgG4 autoantibodies require self-antigen driven affinity maturation to acquire pathogenic capacity
Fichtner M, Vieni C, Redler R, Jiang R, Suarez P, Nowak R, Burden S, Bhabha G, Ekiert D, O’Connor K. Monovalent IgG4 autoantibodies require self-antigen driven affinity maturation to acquire pathogenic capacity. The Journal Of Immunology 2020, 204: 224.39-224.39. DOI: 10.4049/jimmunol.204.supp.224.39.Peer-Reviewed Original ResearchMuSK myasthenia gravisMyasthenia gravisUnmutated common ancestorPathogenic capacityB-cell-mediated autoimmune diseasesAntigen-driven affinity maturationCell-mediated autoimmune diseaseMuscle-specific tyrosine kinaseSubset of patientsAutoreactive B cellsMonovalent antigen-binding fragmentsAffinity maturationHuman monoclonal autoantibodiesUnique autoantibodiesIgG4 autoantibodiesPathogenic autoantibodiesAutoimmune disordersAutoimmune responseAutoimmune diseasesSelf antigensIgG4 subclassAutoantibodiesMG autoantibodiesB cellsFab-arm exchange
2019
Characterization of pathogenic monoclonal autoantibodies derived from muscle-specific kinase myasthenia gravis patients
Takata K, Stathopoulos P, Cao M, Mané-Damas M, Fichtner ML, Benotti ES, Jacobson L, Waters P, Irani SR, Martinez-Martinez P, Beeson D, Losen M, Vincent A, Nowak RJ, O’Connor K. Characterization of pathogenic monoclonal autoantibodies derived from muscle-specific kinase myasthenia gravis patients. JCI Insight 2019, 4: e127167. PMID: 31217355, PMCID: PMC6629167, DOI: 10.1172/jci.insight.127167.Peer-Reviewed Original ResearchConceptsMyasthenia gravisMonoclonal autoantibodiesNeuromuscular junctionMuscle-specific tyrosine kinaseMuSK-MG patientsChronic autoimmune disorderMyasthenia gravis patientsSubset of patientsMouse neuromuscular junctionHuman monoclonal autoantibodiesMuSK autoantibodiesAutoimmune mechanismsGravis patientsMG patientsMost patientsPathogenic autoantibodiesAutoimmune disordersMuscle weaknessNeuromuscular transmissionMuSK phosphorylationAutoantibodiesB cellsAcetylcholine receptorsSynaptic differentiationPatients
2017
Durability of the Rituximab Response in Acetylcholine Receptor Autoantibody–Positive Myasthenia Gravis
Robeson KR, Kumar A, Keung B, DiCapua DB, Grodinsky E, Patwa HS, Stathopoulos PA, Goldstein JM, O’Connor K, Nowak RJ. Durability of the Rituximab Response in Acetylcholine Receptor Autoantibody–Positive Myasthenia Gravis. JAMA Neurology 2017, 74: 60-66. PMID: 27893014, DOI: 10.1001/jamaneurol.2016.4190.Peer-Reviewed Original ResearchConceptsDurability of responseMyasthenia gravisRituximab treatmentAnti-AChR antibody levelsB cell-targeted therapiesLong-term clinical responseRetrospective case series studyTreatment of MGEvidence-based practice parametersLast rituximab treatmentRefractory myasthenia gravisSerum cytokine levelsComplete stable remissionSubset of patientsCase series studyMyasthenia Gravis FoundationMG clinicPharmacologic remissionRituximab cyclesSustained remissionAutoantibody levelsInflammatory markersRituximab therapyClinical improvementClinical response