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Keogh M, Topf A, Marini-Bettolo C, Hudson J, Colomer J, Nascimento A, Oliver M, Alvarez R, Durmus H, Nafissi S, Bastian A, Vissing J, Witting N, Diaz-Manera J, Straub V. OTHER NMDs. Neuromuscul Disord 2021. [DOI: 10.1016/j.nmd.2021.07.381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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2
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Yilmaz V, Tuzun E, Durmus H, Oflazer P, Aysal F, Parman Y, Gungor-Tuncer O, Deymeer F, Saruhan-Direskeneli G. The treatment effect on peripheral B cell markers in antibody positive myasthenia gravis patients. J Neuroimmunol 2020; 349:577402. [PMID: 32977248 DOI: 10.1016/j.jneuroim.2020.577402] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 09/01/2020] [Accepted: 09/19/2020] [Indexed: 12/13/2022]
Abstract
B cells play a major role in the pathophysiology of myasthenia gravis (MG) with their ability to produce disease specific, pathogenic antibodies. However, their status during disease development and follow-up stages of the disease in the peripheral blood may need further studies to determine useful markers. In this study, we aimed to detect B cell associated factors concerning immunosuppressive treatment in generalized non-thymomatous MG patients. Although CD19+ B cell distribution did not vary among disease subgroups, expressions of both CD38 and BAFFR were altered on B cells in MG patients under immunosuppressive therapy. Serum levels of BAFF were elevated in untreated MG patients as compared to treated MG patients and healthy controls. B cell activation factors may show profound alterations due to immunosuppression.
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Affiliation(s)
- V Yilmaz
- Department of Physiology, Istanbul University, Turkey; Department of Neuroscience, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey..
| | - E Tuzun
- Department of Neuroscience, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - H Durmus
- Department of Neurology, Istanbul Medical Faculty, Istanbul University, Turkey
| | - P Oflazer
- Department of Neurology, Istanbul Medical Faculty, Istanbul University, Turkey
| | - F Aysal
- Department of Neurology, Bakirkoy Research and Training Hospital for Psychiatric and Neurological Diseases, Turkey
| | - Y Parman
- Department of Neurology, Istanbul Medical Faculty, Istanbul University, Turkey
| | - O Gungor-Tuncer
- Department of Neurology, Sisli Florence Nightingale Hospital, Demiroglu Bilim University, Turkey
| | - F Deymeer
- Department of Neurology, Istanbul Medical Faculty, Istanbul University, Turkey
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3
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Mroczek M, Durmus H, Töpf A, Parman Y, Straub V. LIMB GIRDLE MUSCULAR DYSTROPHIES. Neuromuscul Disord 2020. [DOI: 10.1016/j.nmd.2020.08.153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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4
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Durmus H, Cakar A, Parman Y. CONGENITAL MYOPATHIES 2. Neuromuscul Disord 2020. [DOI: 10.1016/j.nmd.2020.08.101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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5
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Toksoy G, Durmus H, Aghayev A, Bagirova G, Sevinc Rustemoglu B, Basaran S, Avci S, Karaman B, Parman Y, Altunoglu U, Yapici Z, Tekturk P, Deymeer F, Topaloglu H, Kayserili H, Oflazer-Serdaroglu P, Uyguner ZO. Mutation spectrum of 260 dystrophinopathy patients from Turkey and important highlights for genetic counseling. Neuromuscul Disord 2019; 29:601-613. [DOI: 10.1016/j.nmd.2019.03.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 03/20/2019] [Accepted: 03/25/2019] [Indexed: 12/24/2022]
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Durmus H, Scalco R, Gardiner A, Manole A, Schapira A, Morrow J, Houlden H, Holton J, Johnson K, Töpf A, Phillips L, Deymeer F, Parman Y, Straub V, Quinlivan R, Oflazer-Serdaoglu P. Anoctamin 5 muscular dystrophy mimicking metabolic myopathy. Neuromuscul Disord 2017. [DOI: 10.1016/j.nmd.2017.06.188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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7
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Johnson K, Töpf A, Bertoli M, Phillips L, De Ridder W, Baets J, De Jonghe P, Deconinck T, Rakocevic Stojanovic V, Perić S, Durmus H, Jamal-Omidi S, Nafissi S, Łusakowska A, Mongini T, Lek M, Valkanas E, Mullen T, Xu L, MacArthur D, Straub V. Detection of TRIM32 variants associated with LGMD2H in a large cohort of patients with unexplained limb-girdle weakness. Neuromuscul Disord 2017. [DOI: 10.1016/j.nmd.2017.06.182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Scalco R, Quinlivan R, Lucia A, Santalla A, Martinuzzi A, Toscano A, Musumeci O, Milan BS, Durmus H, Voermans N, Laforêt P, Kuhnle E, Martin M, Siciliano G, Sacconi S, Ortega X, Pinos T, Marti R, Vissing J. The EUROMAC registry for rare glycogen storage diseases: preliminary report. Neuromuscul Disord 2017. [DOI: 10.1016/j.nmd.2017.06.397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Johnson K, Töpf A, Bertoli M, Phillips L, De Ridder W, De Jonghe P, Baets J, Deconinck T, Stojanovic V, Peric S, Durmus H, Omidi S, Nafissi S, Lusakowska A, Mongini T, Lek M, MacArthur D, Straub V. Detection of TRIM32 variants associated with LGMD2H in a large cohort of patients with unexplained limb-girdle weakness. Neuromuscul Disord 2017. [DOI: 10.1016/s0960-8966(17)30338-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Celik-Ozenci C, Kuscu N, Gungor-Ordueri NE, Tasatargil A, Sahin P, Durmus H. Inhibition of poly(ADP-ribose) polymerase may have preventive potential for varicocoele-associated testicular damage in rats. Andrology 2016; 5:362-369. [DOI: 10.1111/andr.12305] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Revised: 09/27/2016] [Accepted: 10/28/2016] [Indexed: 01/29/2023]
Affiliation(s)
- C. Celik-Ozenci
- Department of Histology and Embryology; Akdeniz University School of Medicine; Antalya Turkey
| | - N. Kuscu
- Department of Histology and Embryology; Akdeniz University School of Medicine; Antalya Turkey
| | - N. E. Gungor-Ordueri
- Department of Histology and Embryology; Biruni University School of Medicine; Istanbul Turkey
| | - A. Tasatargil
- Department of Pharmacology; Akdeniz University School of Medicine; Antalya Turkey
| | - P. Sahin
- Department of Histology and Embryology; Akdeniz University School of Medicine; Antalya Turkey
| | - H. Durmus
- Department of Oncology; Sana Klinikum Hameln-Pyrmont; Hameln Germany
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Durmus H, Deymeer F, Parman Y, Oflazer-Serdaroğlu P. Distribution and severity of weakness in patients with polymyositis and dermatomyositis: Different pathophysiology, different affected muscle groups. Neuromuscul Disord 2016. [DOI: 10.1016/j.nmd.2016.06.218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Stergiou C, Lazaridis K, Zouvelou V, Tzartos J, 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 KA, Zamba-Papanicolaou E, Kyriakides T, Kostera-Pruszczyk A, Szczudlik P, Szyluk B, Lavrnic D, Basta I, Peric S, Tallaksen C, Maniaol A, Gilhus NE, Casasnovas Pons C, Pitha J, Jakubíkova M, Hanisch F, Bogomolovas J, Labeit D, Labeit S, Tzartos SJ. Titin antibodies in "seronegative" myasthenia gravis--A new role for an old antigen. J Neuroimmunol 2016; 292:108-15. [PMID: 26943968 DOI: 10.1016/j.jneuroim.2016.01.018] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 01/25/2016] [Indexed: 12/11/2022]
Abstract
Myasthenia gravis (MG) is an autoimmune disease caused by antibodies targeting the neuromuscular junction of skeletal muscles. Triple-seronegative MG (tSN-MG, without detectable AChR, MuSK and LRP4 antibodies), which accounts for ~10% of MG patients, presents a serious gap in MG diagnosis and complicates differential diagnosis of similar disorders. Several AChR antibody positive patients (AChR-MG) also have antibodies against titin, usually detected by ELISA. We have developed a very sensitive radioimmunoprecipitation assay (RIPA) for titin antibodies, by which many previously negative samples were found positive, including several from tSN-MG patients. The validity of the RIPA results was confirmed by western blots. Using this RIPA we screened 667 MG sera from 13 countries; as expected, AChR-MG patients had the highest frequency of titin antibodies (40.9%), while MuSK-MG and LRP4-MG patients were positive in 14.6% and 16.4% respectively. Most importantly, 13.4% (50/372) of the tSN-MG patients were also titin antibody positive. None of the 121 healthy controls or the 90 myopathy patients, and only 3.6% (7/193) of other neurological disease patients were positive. We thus propose that the present titin antibody RIPA is a useful tool for serological MG diagnosis of tSN patients.
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Affiliation(s)
- C Stergiou
- Hellenic Pasteur Institute, Athens, Greece; Tzartos NeuroDiagnostics, Athens, Greece
| | | | - V Zouvelou
- Neurology Department, Aeginition Hospital, Athens, Greece
| | - J Tzartos
- Hellenic Pasteur Institute, Athens, Greece; Tzartos NeuroDiagnostics, Athens, Greece
| | - R Mantegazza
- Neurological Institute "C. Besta", Milano, Italy
| | - C Antozzi
- Neurological Institute "C. Besta", Milano, Italy
| | - F Andreetta
- Neurological Institute "C. Besta", Milano, Italy
| | - A Evoli
- Institute of Neurology, Catholic University, Rome, Italy
| | - F Deymeer
- Istanbul University, Istanbul, Turkey
| | | | - H Durmus
- Istanbul University, Istanbul, Turkey
| | - T Brenner
- Hadassah Hebrew University Medical Center, Jerusalem, Israel
| | - A Vaknin
- Hadassah Hebrew University Medical Center, Jerusalem, Israel
| | | | - A Behin
- UPMC and INSERM, Paris, France
| | - T Sharshar
- Raymond Poincaré Hospital, Garches, France
| | - M De Baets
- School for Mental Health and Neuroscience, Maastricht University, The Netherlands
| | - M Losen
- School for Mental Health and Neuroscience, Maastricht University, The Netherlands
| | - P Martinez-Martinez
- School for Mental Health and Neuroscience, Maastricht University, The Netherlands
| | - K A Kleopa
- The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
| | | | - T Kyriakides
- The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
| | | | - P Szczudlik
- Department of Neurology, Medical University of Warsaw, Poland
| | - B Szyluk
- Department of Neurology, Medical University of Warsaw, Poland
| | - D Lavrnic
- Neurology Clinic, Clinical Center of Serbia, School of Medicine, University of Belgrade, Belgrade, Serbia
| | - I Basta
- Neurology Clinic, Clinical Center of Serbia, School of Medicine, University of Belgrade, Belgrade, Serbia
| | - S Peric
- Neurology Clinic, Clinical Center of Serbia, School of Medicine, University of Belgrade, Belgrade, Serbia
| | - C Tallaksen
- Norway Department of Neurology, Ullevaal University Hospital, Oslo, Norway; Faculty of Medicine, Olso University, Norway
| | - A Maniaol
- Norway Department of Neurology, Ullevaal University Hospital, Oslo, Norway
| | - N E Gilhus
- Department of Clinical Medicine, University of Bergen, Norway
| | | | - J Pitha
- Department of Neurology and Clinical Neuroscience Center, 1st Faculty of Medicine, Charles University and General Teaching Hospital, Prague, Czech Republic
| | - M Jakubíkova
- Department of Neurology and Clinical Neuroscience Center, 1st Faculty of Medicine, Charles University and General Teaching Hospital, Prague, Czech Republic
| | - F Hanisch
- Universitätsklinikum Halle, Halle, Germany
| | - J Bogomolovas
- Faculty of Clinical Medicine Manheim, University of Heidelberg, Germany
| | - D Labeit
- Faculty of Clinical Medicine Manheim, University of Heidelberg, Germany; Myomedix GmbH, 69151 Neckargemuend, Germany
| | - S Labeit
- Faculty of Clinical Medicine Manheim, University of Heidelberg, Germany
| | - S J Tzartos
- Hellenic Pasteur Institute, Athens, Greece; Tzartos NeuroDiagnostics, Athens, Greece.
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Gelisin O, Durmus H, Yakal S, Kasikcioglu E, Parman Y, Deymeer F, Oflazer-Serdaroğlu P. Evaluation of maximum oxygen utilization in McArdle patients before and after exercise training. Neuromuscul Disord 2015. [DOI: 10.1016/j.nmd.2015.06.130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Yildiz-Celik S, Durmus H, Hajibehzad M, Yilmaz V, Oflazer-Serdaroglu P, Parman Y, Saruhan-Direskeneli G, Deyemeer F. G.P.138. Neuromuscul Disord 2014. [DOI: 10.1016/j.nmd.2014.06.168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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15
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Ozcan O, Durmus H, Tarhan O, Polat Z, Deymeer F, Parman Y, Oflazer-Serdaroglu P. G.P.8. Neuromuscul Disord 2014. [DOI: 10.1016/j.nmd.2014.06.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Gokyigt (Celik) M, Ertekin C, Ercan I, Kuloglu Pazarci N, Seker S, Durmus H, Oflazer P. P443: Swallowing difficulty in oculopharyngodistal myopathy: electrophysiological evaluation. Clin Neurophysiol 2014. [DOI: 10.1016/s1388-2457(14)50548-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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17
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Zisimopoulou P, Evangelakou P, Tzartos J, Lazaridis K, Zouvelou V, Mantegazza R, Antozzi C, Andreetta F, Evoli A, Deymeer F, Saruhan-Direskeneli G, Durmus H, Brenner T, Vaknin A, Berrih-Aknin S, Frenkian Cuvelier M, Stojkovic T, DeBaets M, 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, Tzartos SJ. A comprehensive analysis of the epidemiology and clinical characteristics of anti-LRP4 in myasthenia gravis. J Autoimmun 2013; 52:139-45. [PMID: 24373505 DOI: 10.1016/j.jaut.2013.12.004] [Citation(s) in RCA: 183] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2013] [Accepted: 12/08/2013] [Indexed: 11/29/2022]
Abstract
Double-seronegative myasthenia gravis (dSN-MG, without detectable AChR and MuSK antibodies) presents a serious gap in MG diagnosis and understanding. Recently, autoantibodies against the low-density lipoprotein receptor-related protein 4 (LRP4) have been identified in several dSN-MG sera, but with dramatic frequency variation (∼2-50%). We have developed a cell based assay (CBA) based on human LRP4 expressing HEK293 cells, for the reliable and efficient detection of LRP4 antibodies. We have screened about 800 MG patient sera from 10 countries for LRP4 antibodies. The overall frequency of LRP4-MG in the dSN-MG group (635 patients) was 18.7% but with variations among different populations (range 7-32.7%). Interestingly, we also identified double positive sera: 8/107 anti-AChR positive and 10/67 anti-MuSK positive sera also had detectable LRP4 antibodies, predominantly originating from only two of the participating groups. No LRP4 antibodies were identified in sera from 56 healthy controls tested, while 4/110 from patients with other neuroimmune diseases were positive. The clinical data, when available, for the LRP4-MG patients were then studied. At disease onset symptoms were mild (81% had MGFA grade I or II), with some identified thymic changes (32% hyperplasia, none with thymoma). On the other hand, double positive patients (AChR/LRP4-MG and MuSK/LRP4-MG) had more severe symptoms at onset compared with any single positive MG subgroup. Contrary to MuSK-MG, 27% of ocular dSN-MG patients were LRP4 antibody positive. Similarly, contrary to MuSK antibodies, which are predominantly of the IgG4 subtype, LRP4 antibodies were predominantly of the IgG1 and IgG2 subtypes. The prevalence was higher in women than in men (female/male ratio 2.5/1), with an average disease onset at ages 33.4 for females and 41.9 for males. Overall, the response of LRP4-MG patients to treatment was similar to published responses of AChR-MG rather than to MuSK-MG patients.
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Affiliation(s)
| | - P Evangelakou
- Hellenic Pasteur Institute, Athens, Greece; University of Patras, Patras, Greece
| | - J Tzartos
- Hellenic Pasteur Institute, Athens, Greece
| | | | - V Zouvelou
- Neurology Department, Aeginition Hospital, Athens, Greece
| | - R Mantegazza
- Neurological Institute "C. Besta", Milano, Italy
| | - C Antozzi
- Neurological Institute "C. Besta", Milano, Italy
| | - F Andreetta
- Neurological Institute "C. Besta", Milano, Italy
| | - A Evoli
- Institute of Neurology, Catholic University, Rome, Italy
| | - F Deymeer
- Istanbul University, Istanbul, Turkey
| | | | - H Durmus
- Istanbul University, Istanbul, Turkey
| | - T Brenner
- Hadassah Hebrew University Medical Center, Jerusalem, Israel
| | - A Vaknin
- Hadassah Hebrew University Medical Center, Jerusalem, Israel
| | | | | | | | - M DeBaets
- School for Mental Health and Neuroscience, Maastricht University, The Netherlands
| | - M Losen
- School for Mental Health and Neuroscience, Maastricht University, The Netherlands
| | - P Martinez-Martinez
- School for Mental Health and Neuroscience, Maastricht University, The Netherlands
| | - K A Kleopa
- The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
| | | | - T Kyriakides
- The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
| | | | - P Szczudlik
- Department of Neurology, Medical University of Warsaw, Poland
| | - B Szyluk
- Department of Neurology, Medical University of Warsaw, Poland
| | - D Lavrnic
- Serbia, Clinic of Neurology, Clinical Center of Serbia, Serbia
| | - I Basta
- Serbia, Clinic of Neurology, Clinical Center of Serbia, Serbia
| | - S Peric
- Serbia, Clinic of Neurology, Clinical Center of Serbia, Serbia
| | - C Tallaksen
- Norway Department of Neurology, Ullevaal University Hospital, Oslo, Norway
| | - A Maniaol
- Norway Department of Neurology, Ullevaal University Hospital, Oslo, Norway
| | - S J Tzartos
- Hellenic Pasteur Institute, Athens, Greece; University of Patras, Patras, Greece.
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Yıldız-Celik S, Durmus H, Yilmaz V, Serdaroglu-Oflazer P, Gulsen-Parman Y, Saruhan-Direskeneli G, Deymeer F. Late-onset non-thymomatous generalized myasthenia gravis. J Neurol Sci 2013. [DOI: 10.1016/j.jns.2013.07.1683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Durmus H, Laval SH, Deymeer F, Parman Y, Kiyan E, Gokyigiti M, Ertekin C, Ercan I, Solakoglu S, Karcagi V, Straub V, Bushby K, Lochmuller H, Serdaroglu-Oflazer P. Oculopharyngodistal myopathy is a distinct entity: Clinical and genetic features of 47 patients. Neurology 2011; 76:227-35. [DOI: 10.1212/wnl.0b013e318207b043] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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