MuSK autoantibodies in myasthenia gravis detected by cell based assay — A multinational study

Abstract Seronegative myasthenia gravis (MG) presents a serious gap in MG diagnosis and understanding. We applied a cell based assay (CBA) for the detection of muscle specific kinase (MuSK) antibodies undetectable by radioimmunoassay. We tested 633 triple-seronegative MG patients' sera from 13...

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Veröffentlicht in:Journal of neuroimmunology 2015-07, Vol.284, p.10-17
Hauptverfasser: Tsonis, A.I, Zisimopoulou, P, Lazaridis, K, Tzartos, J, Matsigkou, E, Zouvelou, V, Mantegazza, R, Antozzi, C, Andreetta, F, Evoli, A, Deymeer, F, Saruhan-Direskeneli, G, Durmus, H, Brenner, T, Vaknin, A, Berrih-Aknin, S, Behin, A, Sharshar, T, De Baets, M, Losen, M, Martinez-Martinez, P, Kleopa, K.A, Zamba-Papanicolaou, E, Kyriakides, T, Kostera-Pruszczyk, A, Szczudlik, P, Szyluk, B, Lavrnic, D, Basta, I, Peric, S, Tallaksen, C, Maniaol, A, Casasnovas Pons, C, Pitha, J, Jakubíkova, M, Hanisch, F, Tzartos, S.J
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container_title Journal of neuroimmunology
container_volume 284
creator Tsonis, A.I
Zisimopoulou, P
Lazaridis, K
Tzartos, J
Matsigkou, E
Zouvelou, V
Mantegazza, R
Antozzi, C
Andreetta, F
Evoli, A
Deymeer, F
Saruhan-Direskeneli, G
Durmus, H
Brenner, T
Vaknin, A
Berrih-Aknin, S
Behin, A
Sharshar, T
De Baets, M
Losen, M
Martinez-Martinez, P
Kleopa, K.A
Zamba-Papanicolaou, E
Kyriakides, T
Kostera-Pruszczyk, A
Szczudlik, P
Szyluk, B
Lavrnic, D
Basta, I
Peric, S
Tallaksen, C
Maniaol, A
Casasnovas Pons, C
Pitha, J
Jakubíkova, M
Hanisch, F
Tzartos, S.J
description Abstract Seronegative myasthenia gravis (MG) presents a serious gap in MG diagnosis and understanding. We applied a cell based assay (CBA) for the detection of muscle specific kinase (MuSK) antibodies undetectable by radioimmunoassay. We tested 633 triple-seronegative MG patients' sera from 13 countries, detecting 13% as positive. MuSK antibodies were found, at significantly lower frequencies, in 1.9% of healthy controls and 5.1% of other neuroimmune disease patients, including multiple sclerosis and neuromyelitis optica. The clinical data of the newly diagnosed MuSK-MG patients are presented. 27% of ocular seronegative patients were MuSK antibody positive. Moreover, 23% had thymic hyperplasia suggesting that thymic abnormalities are more common than believed.
doi_str_mv 10.1016/j.jneuroim.2015.04.015
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We applied a cell based assay (CBA) for the detection of muscle specific kinase (MuSK) antibodies undetectable by radioimmunoassay. We tested 633 triple-seronegative MG patients' sera from 13 countries, detecting 13% as positive. MuSK antibodies were found, at significantly lower frequencies, in 1.9% of healthy controls and 5.1% of other neuroimmune disease patients, including multiple sclerosis and neuromyelitis optica. The clinical data of the newly diagnosed MuSK-MG patients are presented. 27% of ocular seronegative patients were MuSK antibody positive. 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subjects Adult
Aged
Allergy and Immunology
Autoantibodies
Autoantibodies - blood
Cell based assay
Diagnosis
Female
Flow Cytometry
Humans
International Cooperation
LDL-Receptor Related Proteins - immunology
Male
Middle Aged
MuSK
Myasthenia gravis
Myasthenia Gravis - blood
Myasthenia Gravis - diagnosis
Myasthenia Gravis - pathology
Neurology
Neuromyelitis Optica - diagnosis
Radioimmunoassay
Receptor Protein-Tyrosine Kinases - immunology
Receptors, Cholinergic - immunology
Thymus Gland - pathology
Thymus Hyperplasia - diagnosis
title MuSK autoantibodies in myasthenia gravis detected by cell based assay — A multinational study
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