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Mukaino A, Nakane S, Higuchi O, Nakamura H, Miyagi T, Shiroma K, Tokashiki T, Fuseya Y, Ochi K, Umeda M, Nakazato T, Akioka S, Maruoka H, Hayashi M, Igarashi SI, Yokoi K, Maeda Y, Sakai W, Matsuo H, Kawakami A. Insights from the ganglionic acetylcholine receptor autoantibodies in patients with Sjögren's syndrome. Mod Rheumatol 2016; 26:708-15. [PMID: 26873295 DOI: 10.3109/14397595.2016.1147404] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE It is not known whether autonomic neuropathy is a feature of Sjögren's syndrome (SS) or whether it is related to circulating antiganglionic acetylcholine receptor (gAChR) antibodies. The goal of the present study was to investigate the autonomic dysfunction in patients with SS and the associations between autonomic dysfunction, anti-gAChR antibodies, and clinical features of SS. METHODS (1) The first observational study tested for the presence of gAChR antibodies in the serum samples from 39 patients with SS (absent information regarding autonomic symptoms) and healthy volunteers. (2) In the second study, serological and clinical data from 10 Japanese patients diagnosed with SS were reviewed. These patients showed autonomic dysfunction, and luciferase immunoprecipitation systems (LIPS) test was conducted to detect anti-α3 and anti-β4 gAChR antibodies. (3) In the final analysis, we combined the data of seropositive SS patients with autonomic symptom from the first study with all of the patients from the second study, and analyzed the clinical features. RESULTS (1) The LIPS assay revealed that anti-gAChRα3 and anti-gAChRβ4 antibodies were detected in the sera from patients with SS (23.1%, 9/39). Five of nine SS patients had autonomic symptoms. (2) Anti-α3 and anti-β4 gAChR antibodies were also detected in 80.0% (8/10) of patients with SS with autonomic symptoms. Six of the ten patients were diagnosed as having SS after neurological symptoms developed. These seropositive patients had predominant and severe autonomic symptoms and were diagnosed with autonomic neuropathy. (3) Thirteen of fifteen SS patients with autonomic symptoms (86.7%) were seropositive for anti-gAChR antibodies, and we confirmed sicca complex, orthostatic hypotension, upper and lower gastrointestinal (GI) symptoms, and bladder dysfunction at high rates. CONCLUSION The present results suggest the possibility of anti-gAChR antibodies aiding the diagnostics of SS with autonomic dysfunction.
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Affiliation(s)
- Akihiro Mukaino
- a Department of Clinical Neuroscience and Neurology , Nagasaki University Graduate School of Biomedical Sciences , Nagasaki , Japan
| | - Shunya Nakane
- b Department of Clinical Research and.,c Department of Neurology , Nagasaki Kawatana Medical Center , Nagasaki , Japan
| | | | - Hideki Nakamura
- d Department of Immunology and Rheumatology , Nagasaki University Graduate School of Biomedical Sciences , Nagasaki , Japan
| | - Tomo Miyagi
- e Department of Cardiovascular Medicine, Nephrology and Neurology , University of the Ryukyu School of Medicine , Okinawa , Japan
| | - Kanako Shiroma
- e Department of Cardiovascular Medicine, Nephrology and Neurology , University of the Ryukyu School of Medicine , Okinawa , Japan
| | - Takashi Tokashiki
- e Department of Cardiovascular Medicine, Nephrology and Neurology , University of the Ryukyu School of Medicine , Okinawa , Japan
| | - Yasuhiro Fuseya
- f Department of Neurology , Kitano Hospital Medical Research Institute , Osaka , Japan
| | - Kazuhide Ochi
- g Department of Neurology , Hiroshima University Hospital , Hiroshima , Japan
| | - Masataka Umeda
- d Department of Immunology and Rheumatology , Nagasaki University Graduate School of Biomedical Sciences , Nagasaki , Japan
| | - Tetsuya Nakazato
- h Department of Neurology , Sapporo Yamanoue Hospital , Sapporo , Japan
| | - Shinji Akioka
- i Department of Pediatrics, Graduate School of Medical Science , Kyoto Prefectural University of Medicine , Kyoto , Japan
| | - Hiroyuki Maruoka
- j Department of Neurology and Neurological Science, and Predictive and Preventive Medicine , Tokyo Medical and Dental University , Tokyo , Japan
| | | | - Shu-Ichi Igarashi
- l Department of Neurology , Niigata City General Hospital , Niigata , Japan , and
| | - Katsunori Yokoi
- m Department of Neurology , Anjo Kosei Hospital , Aichi , Japan
| | - Yasuhiro Maeda
- c Department of Neurology , Nagasaki Kawatana Medical Center , Nagasaki , Japan
| | - Waka Sakai
- c Department of Neurology , Nagasaki Kawatana Medical Center , Nagasaki , Japan
| | - Hidenori Matsuo
- c Department of Neurology , Nagasaki Kawatana Medical Center , Nagasaki , Japan
| | - Atsushi Kawakami
- d Department of Immunology and Rheumatology , Nagasaki University Graduate School of Biomedical Sciences , Nagasaki , Japan
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