MuSK autoantibodies in myasthenia gravis detected by cell based assay--A multinational study
| Main Authors: | Tsonis, AI, 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, J, Losen, M, Martinez-Martinez, P, Kleopa, KA, 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, SJ |
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| Format: | Article Journal |
| Terbitan: |
, 2015
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| Online Access: |
https://zenodo.org/record/2587578 |
Daftar Isi:
- 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.