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Sekiguchi K, Huh S, Watanabe N, Miyazaki N, Ishizuchi K, Iba C, Tagashira Y, Shibata M, Takemura R, Nakahara J, Takizawa T. Prevalence of Primary Headache in Nurses in Japan: A Cross-sectional Single-center Study. Intern Med 2024; 63:1217-1222. [PMID: 37722898 DOI: 10.2169/internalmedicine.1757-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 09/20/2023] Open
Abstract
Objective This study examined the prevalence of migraine in nurses in Japan, which, to our knowledge, has not been documented in English. Methods From April to May 2021, we administered a questionnaire to 229 nurses working at Keio University Hospital to investigate the prevalence and characteristics of headache among nurses in Japan. Headaches were classified as migraine or tension-type headache (TTH) based on the International Classification of Headache Disorders 3rd edition (ICHD-3). Results In total, 80 patients (34.9%) had primary headaches, including 47 (20.5%) with migraine and probable migraine and 33 (14.4%) with TTH and probable TTH. We found a significant difference in the Numerical Rating Scale score, nausea and vomiting, photophobia, phonophobia, and aggravation by routine physical activity between migraine and TTH. The specificities for a migraine diagnosis were 100% and 93.9% for nausea/vomiting and photophobia, respectively. Only 8.8% of patients had their headaches diagnosed by a physician. Conclusion Migraines have a high prevalence (>20%) among nurses and are often under-diagnosed. In many cases, headache-associated symptoms are more important than laterality or other characteristics for the diagnosis. Many nurses are treated for headaches without a correct diagnosis. Further education regarding primary headaches may be necessary for health practitioners as well as society.
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Affiliation(s)
- Koji Sekiguchi
- Department of Neurology, Keio University School of Medicine, Japan
| | - Sunjun Huh
- Department of Neurology, Keio University School of Medicine, Japan
| | - Narumi Watanabe
- Department of Neurology, Keio University School of Medicine, Japan
| | - Naoki Miyazaki
- Biostatistics Unit, Clinical and Translational Research Center, Keio University Hospital, Japan
| | - Kei Ishizuchi
- Department of Neurology, Keio University School of Medicine, Japan
| | - Chisato Iba
- Department of Neurology, Keio University School of Medicine, Japan
| | - Yu Tagashira
- Department of Neurology, Keio University School of Medicine, Japan
| | - Mamoru Shibata
- Department of Neurology, Tokyo Dental College Ichikawa General Hospital, Japan
| | - Ryo Takemura
- Biostatistics Unit, Clinical and Translational Research Center, Keio University Hospital, Japan
| | - Jin Nakahara
- Department of Neurology, Keio University School of Medicine, Japan
| | - Tsubasa Takizawa
- Department of Neurology, Keio University School of Medicine, Japan
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Okuzono Y, Miyakawa S, Itou T, Sagara M, Iwata M, Ishizuchi K, Sekiguchi K, Motegi H, Oyama M, Warude D, Kikukawa Y, Suzuki S. B-cell immune dysregulation with low soluble CD22 levels in refractory seronegative myasthenia gravis. Front Immunol 2024; 15:1382320. [PMID: 38711503 PMCID: PMC11071663 DOI: 10.3389/fimmu.2024.1382320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Accepted: 04/01/2024] [Indexed: 05/08/2024] Open
Abstract
Myasthenia gravis (MG), primarily caused by acetylcholine receptor (AChR) autoantibodies, is a chronic autoimmune disorder causing severe muscle weakness and fatigability. In particular, seronegative MG constitutes 10%-15% of MG cases and presents diagnostic challenges especially in early-onset female patients who often show severe disease and resistance to immunosuppressive therapy. Furthermore, the immunopathology of seronegative MG remains unclear. Thus, in this study, we aimed to elucidate the pathogenic mechanism of seronegative MG using scRNA-seq analysis and plasma proteome analysis; in particular, we investigated the relationship between immune dysregulation status and disease severity in refractory seronegative MG. Employing single-cell RNA-sequencing and plasma proteome analyses, we analyzed peripheral blood samples from 30 women divided into three groups: 10 healthy controls, 10 early-onset AChR-positive MG, and 10 refractory early-onset seronegative MG patients, both before and after intravenous immunoglobulin treatment. The disease severity was evaluated using the MG-Activities of Daily Living (ADL), MG composite (MGC), and revised 15-item MG-Quality of Life (QOL) scales. We observed numerical abnormalities in multiple immune cells, particularly B cells, in patients with refractory seronegative MG, correlating with disease activity. Notably, severe MG cases had fewer regulatory T cells without functional abnormalities. Memory B cells were found to be enriched in peripheral blood cells compared with naïve B cells. Moreover, plasma proteome analysis indicated significantly lower plasma protein levels of soluble CD22, expressed in the lineage of B-cell maturation (including mature B cells and memory B cells), in refractory seronegative MG patients than in healthy donors or patients with AChR-positive MG. Soluble CD22 levels were correlated with disease severity, B-cell frequency, and RNA expression levels of CD22. In summary, this study elucidates the immunopathology of refractory seronegative MG, highlighting immune disorders centered on B cells and diminished soluble CD22 levels. These insights pave the way for novel MG treatment strategies focused on B-cell biology.
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Affiliation(s)
- Yuumi Okuzono
- Oncology Drug Discovery Unit Japan, Research, Takeda Pharmaceutical Company Limited, Kanagawa, Japan
| | - Shuuichi Miyakawa
- Oncology Drug Discovery Unit Japan, Research, Takeda Pharmaceutical Company Limited, Kanagawa, Japan
| | - Tatsuo Itou
- Oncology Drug Discovery Unit Japan, Research, Takeda Pharmaceutical Company Limited, Kanagawa, Japan
| | - Masaki Sagara
- Oncology Drug Discovery Unit Japan, Research, Takeda Pharmaceutical Company Limited, Kanagawa, Japan
| | - Masashi Iwata
- Oncology Drug Discovery Unit Japan, Research, Takeda Pharmaceutical Company Limited, Kanagawa, Japan
| | - Kei Ishizuchi
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan
| | - Koji Sekiguchi
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan
| | - Haruhiko Motegi
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan
- Department of Neurology, The Jikei University School of Medicine, Tokyo, Japan
| | - Munenori Oyama
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan
| | - Dnyaneshwar Warude
- Oncology Drug Discovery Unit Japan, Research, Takeda Pharmaceutical Company Limited, Kanagawa, Japan
| | - Yusuke Kikukawa
- Oncology Drug Discovery Unit Japan, Research, Takeda Pharmaceutical Company Limited, Kanagawa, Japan
| | - Shigeaki Suzuki
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan
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3
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Okusa S, Takizawa T, Imai S, Oyama M, Ishizuchi K, Nakahara J, Hori S, Suzuki S. Serious Bacterial Infections Associated with Eculizumab: A Pharmacovigilance Study. Intern Med 2024; 63:1061-1066. [PMID: 37690847 DOI: 10.2169/internalmedicine.1893-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 09/12/2023] Open
Abstract
Objective Molecular-targeted agents, including eculizumab and rituximab, are considered treatment options for refractory myasthenia gravis (MG), but bacterial infections can occur as serious adverse events when using these agents. The present study elucidated the relative risks of bacterial infections associated with eculizumab and rituximab using a pharmacovigilance database. Methods We analyzed eculizumab- and rituximab-associated adverse events reported between 2007 and 2021 in the US Food and Drug Administration Adverse Event Reporting System (FAERS) and herein report a refractory MG patient who developed streptococcal toxic shock syndrome during eculizumab treatment. Patients We evaluated a 74-year-old Japanese woman with refractory MG who developed severe bacteremia after receiving eculizumab. Results A total of 44,215 and 108,485 adverse events were reported with eculizumab and rituximab, respectively, from among 13,742,321 individual case safety reports in the FAERS database after data cleaning. We found a strong association between eculizumab and Neisseria infections. In contrast, we found only one case of meningococcal meningitis treated with rituximab. Both eculizumab and rituximab were weakly associated with streptococcal infections. Two cases of streptococcal toxic shock syndrome were associated with rituximab. Conclusion Careful monitoring of serious bacterial infections associated with eculizumab treatment is warranted.
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Affiliation(s)
- Shohei Okusa
- Department of Neurology, Keio University School of Medicine, Japan
| | - Tsubasa Takizawa
- Department of Neurology, Keio University School of Medicine, Japan
| | - Shungo Imai
- Division of Drug Informatics, Keio University Faculty of Pharmacy, Japan
| | - Munenori Oyama
- Department of Neurology, Keio University School of Medicine, Japan
| | - Kei Ishizuchi
- Department of Neurology, Keio University School of Medicine, Japan
| | - Jin Nakahara
- Department of Neurology, Keio University School of Medicine, Japan
| | - Satoko Hori
- Division of Drug Informatics, Keio University Faculty of Pharmacy, Japan
| | - Shigeaki Suzuki
- Department of Neurology, Keio University School of Medicine, Japan
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4
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Tokuyasu D, Suzuki S, Uzawa A, Nagane Y, Masuda M, Konno S, Kubota T, Samukawa M, Sugimoto T, Ishizuchi K, Oyama M, Yasuda M, Akamine H, Onishi Y, Suzuki Y, Kawaguchi N, Minami N, Kimura T, Takahashi MP, Murai H, Utsugisawa K. Real-world experience with eculizumab and switching to ravulizumab for generalized myasthenia gravis. Ann Clin Transl Neurol 2024. [PMID: 38572524 DOI: 10.1002/acn3.52051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 03/01/2024] [Accepted: 03/10/2024] [Indexed: 04/05/2024] Open
Abstract
OBJECTIVE Eculizumab and ravulizumab are complement protein C5 inhibitors, showing efficacy and tolerability for patients with anti-acetylcholine receptor-positive (AChR+) generalized myasthenia gravis (gMG) in phase 3 clinical trials and subsequent analyses. The purpose of the present study was to evaluate the clinical significance of eculizumab and switching to ravulizumab for refractory AChR+ gMG patients in the real-world experience. METHODS Among the database of Japan MG registry survey 2021, we studied AChR+ gMG patients who received eculizumab. We also evaluated these patients who switched from eculizumab to ravulizumab. Responder was defined as an improvement of at least 3 points in MG-ADL. We performed a questionnaire of preference between eculizumab and ravulizumab. RESULTS Among 1,106 patients with AChR+ gMG, 36 patients (3%) received eculizumab (female 78%, mean age 56.0 years). Eculizumab was preferentially used in severe and refractory MG patients. The duration of eculizumab treatment was 35 months on average. MG-ADL improved from 9.4 ± 4.9 to 5.9 ± 5.1, and 25 (70%) of the 36 gMG patients were responders. Postintervention status was markedly improved after the eculizumab treatment. Of 13 patients who did not continue eculizumab, 6 showed insufficiencies. Early onset MG was most effective. However, 15 patients switching from eculizumab to ravulizumab kept favorable response and tolerability. Questionnaire surveys showed preference for ravulizumab over eculizumab. INTERPRETATION Eculizumab and switching to ravulizumab showed to be effective for refractory AChR+ gMG patients in clinical settings.
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Affiliation(s)
- Daiki Tokuyasu
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan
| | - Shigeaki Suzuki
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan
| | - Akiyuki Uzawa
- Department of Neurology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Yuriko Nagane
- Department of Neurology, Hanamaki General Hospital, Hanamaki, Japan
| | - Masayuki Masuda
- Department of Neurology, Tokyo Medical University, Tokyo, Japan
| | - Shingo Konno
- Department of Neurology, Toho University Ohashi Medical Center, Tokyo, Japan
| | - Tomoya Kubota
- Department of Clinical Laboratory and Biomedical Sciences, Division of Health Sciences, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Makoto Samukawa
- Department of Neurology, Kindai University Faculty of Medicine, Sayama, Japan
| | - Takamichi Sugimoto
- Department of Clinical Neuroscience and Therapeutics, Hiroshima University, Hiroshima, Japan
| | - Kei Ishizuchi
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan
| | - Munenori Oyama
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan
| | - Manato Yasuda
- Department of Neurology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Hiroyuki Akamine
- Department of Neurology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Yosuke Onishi
- Department of Neurology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Yasushi Suzuki
- Department of Neurology, National Hospital Organization Sendai Medical Center, Sendai, Japan
| | - Naoki Kawaguchi
- Department of Neurology, Neurology Chiba Clinic, Chiba, Japan
| | - Naoya Minami
- Department of Neurology, National Hospital Organization Hokkaido Medical Center, Sapporo, Japan
| | - Takashi Kimura
- Department of Neurology, Hyogo Medical University, Nishinomiya, Japan
| | - Masanori P Takahashi
- Department of Clinical Laboratory and Biomedical Sciences, Division of Health Sciences, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Hiroyuki Murai
- Department of Neurology, International University of Health and Welfare, Narita, Japan
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Ohtani S, Watanabe N, Ihara K, Takahashi N, Miyazaki N, Ishizuchi K, Takemura R, Hori S, Nakahara J, Takizawa T. Real-world evidence of fremanezumab for treating migraine in Japan: a retrospective study. BMC Neurol 2023; 23:404. [PMID: 37964188 PMCID: PMC10644569 DOI: 10.1186/s12883-023-03449-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Accepted: 10/26/2023] [Indexed: 11/16/2023] Open
Abstract
BACKGROUND There have been very few real-world studies reported in the literature solely focusing on fremanezumab in Asia. This study aimed to evaluate the efficacy and safety of fremanezumab in a real-world setting in Japan. METHOD This single-centered, observational, retrospective study examined patients with migraines who received four doses of fremanezumab between December 2021 and August 2022 at Keio University Hospital. We assessed the changes in monthly migraine days, responder rates, and migraine-associated symptoms, as well as injection site reactions and adverse events. RESULT Twenty-nine patients were enrolled, wherein 79.3% were women. Compared with those at baseline, the monthly migraine days decreased by 5.9 days at 4 months. The 50% responder rate was 55.2% at 4 months. A total of 57.9%, 47.8%, and 65.0% of patients showed improvement in the severity of photophobia, phonophobia, and nausea/vomiting, respectively. Moreover, injection site reactions were the most common adverse events (55.2%). CONCLUSION Fremanezumab is effective and safe for migraine prevention in Japan. Fremanezumab also improved migraine-associated symptoms in half of the patients.
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Affiliation(s)
- Seiya Ohtani
- Department of Neurology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
- Division of Drug Informatics, Keio University Faculty of Pharmacy, 1-5-30 Shibakoen, Minato-ku, Tokyo, 105-8512, Japan
| | - Narumi Watanabe
- Department of Neurology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Keiko Ihara
- Department of Neurology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Nobuyuki Takahashi
- Department of Neurology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Naoki Miyazaki
- Biostatistics Unit, Clinical and Translational Research Center, Keio University Hospital, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Kei Ishizuchi
- Department of Neurology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Ryo Takemura
- Biostatistics Unit, Clinical and Translational Research Center, Keio University Hospital, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Satoko Hori
- Division of Drug Informatics, Keio University Faculty of Pharmacy, 1-5-30 Shibakoen, Minato-ku, Tokyo, 105-8512, Japan
| | - Jin Nakahara
- Department of Neurology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Tsubasa Takizawa
- Department of Neurology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan.
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Ihara K, Ohtani S, Watanabe N, Takahashi N, Miyazaki N, Ishizuchi K, Hori S, Takemura R, Nakahara J, Takizawa T. Predicting response to CGRP-monoclonal antibodies in patients with migraine in Japan: a single-centre retrospective observational study. J Headache Pain 2023; 24:23. [PMID: 36890436 PMCID: PMC9996919 DOI: 10.1186/s10194-023-01556-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 17.0] [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: 02/07/2023] [Accepted: 02/24/2023] [Indexed: 03/10/2023] Open
Abstract
BACKGROUND Anti-calcitonin gene-related peptide monoclonal antibodies (CGRPmAbs) are a favourable option for patients with migraine who experience distressful headache disability and fail to respond to traditional preventive treatment options. However, since CGRPmAb has been available for only 2 years in Japan, the difference between good and poor responders remains unknown. We aimed to investigate the clinical characteristics of patients with migraine in Japan who responded well to CGRPmAb based on real-world data. METHODS We analysed patients who visited Keio University Hospital, Tokyo, Japan, between the 12th of August 2021 and 31st of August 2022, and were prescribed one of three CGRPmAbs (erenumab, galcanezumab, and fremanezumab) for more than 3 months. We recorded the patients' basic migraine characteristics, such as pain quality, monthly migraine days (MMD)/monthly headache days (MHD), and the number of prior treatment failures. We defined good responders as patients whose MMDs decreased by more than 50% after 3 months of treatment and other patients as poor responders. We compared the baseline migraine characteristics between the two groups and performed logistic regression analysis based on the items that showed statistically significant differences. RESULTS In total, 101 patients were considered eligible for the responder analysis (galcanezumab: 57 (56%), fremanezumab: 31 (31%), and erenumab: 13 (13%)). After 3 months of treatment, 55 (54%) patients achieved ≥ 50% reduction in MMDs. Comparisons between ≥ 50% responders and non-responders revealed that age was significantly higher (p = 0.003), and MHD and total prior treatment failures were significantly lower (p = 0.027, 0.040, respectively), in responders than in non-responders. Age was a positive predictive factor, and the total number of prior treatment failures and past medical history of immuno-rheumatologic diseases were negative predictive factors of CGRPmAb responsiveness in Japanese patients with migraine. CONCLUSIONS Patients with migraine who are older, with fewer prior treatment failures and no past history of immuno-rheumatologic disease, may respond well to CGRPmAbs.
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Affiliation(s)
- Keiko Ihara
- Department of Neurology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Seiya Ohtani
- Department of Neurology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan.,Division of Drug Informatics, Keio Univiersity Faculty of Pharmacy, 1-5-30 Shibakouen, Minato-ku, Tokyo, 105-8512, Japan
| | - Narumi Watanabe
- Department of Neurology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Nobuyuki Takahashi
- Department of Neurology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Naoki Miyazaki
- Biostatistics Unit, Clinical and Translational Research Center, Keio University Hospital, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Kei Ishizuchi
- Department of Neurology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Satoko Hori
- Division of Drug Informatics, Keio Univiersity Faculty of Pharmacy, 1-5-30 Shibakouen, Minato-ku, Tokyo, 105-8512, Japan
| | - Ryo Takemura
- Biostatistics Unit, Clinical and Translational Research Center, Keio University Hospital, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Jin Nakahara
- Department of Neurology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Tsubasa Takizawa
- Department of Neurology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan.
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Mori S, Suzuki S, Konishi T, Kawaguchi N, Kishi M, Kuwabara S, Ishizuchi K, Zhou H, Shibasaki F, Tsumoto H, Omura T, Miura Y, Mori S, Higashihara M, Murayama S, Shigemoto K. Proteolytic ectodomain shedding of muscle-specific tyrosine kinase in myasthenia gravis. Exp Neurol 2023; 361:114300. [PMID: 36525997 DOI: 10.1016/j.expneurol.2022.114300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 11/07/2022] [Accepted: 12/10/2022] [Indexed: 12/15/2022]
Abstract
Autoantibodies to muscle-specific tyrosine kinase (MuSK) proteins at the neuromuscular junction (NMJ) cause refractory generalized myasthenia gravis (MG) with dyspnea more frequently than other MG subtypes. However, the mechanisms via which MuSK, a membrane protein locally expressed on the NMJ of skeletal muscle, is supplied to the immune system as an autoantigen remains unknown. Here, we identified MuSK in both mouse and human serum, with the amount of MuSK dramatically increasing in mice with motor nerve denervation and in MG model mice. Peptide analysis by liquid chromatography-tandem-mass spectrometry (LC-MS/MS) confirmed the presence of MuSK in both human and mouse serum. Furthermore, some patients with MG have significantly higher amounts of MuSK in serum than healthy controls. Our results indicated that the secretion of MuSK proteins from muscles into the bloodstream was induced by ectodomain shedding triggered by neuromuscular junction failure. The results may explain why MuSK-MG is refractory to treatments and causes rapid muscle atrophy in some patients due to the denervation associated with Ab-induced disruption of neuromuscular transmission at the NMJ. Such discoveries pave the way for new MG treatments, and MuSK may be used as a biomarker for other neuromuscular diseases in preclinical studies, clinical diagnostics, therapeutics, and drug discovery.
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Affiliation(s)
- Shuuichi Mori
- Research Team for Geriatric Medicine, Tokyo Metropolitan Institute of Gerontology (TMIG), Tokyo, Japan
| | - Shigeaki Suzuki
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan
| | | | - Naoki Kawaguchi
- Dowa Institute of Clinical Neuroscience, Neurology Clinic Chiba, Chiba, Japan
| | - Masahiko Kishi
- Department of Internal Medicine, Toho University Sakura Medical Center, Chiba, Japan
| | - Satoshi Kuwabara
- Department of Neurology, Chiba University School of Medicine, Chiba, Japan
| | - Kei Ishizuchi
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan
| | - Heying Zhou
- Research Team for Geriatric Medicine, Tokyo Metropolitan Institute of Gerontology (TMIG), Tokyo, Japan
| | - Futoshi Shibasaki
- Department of Genome Medicine, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan
| | - Hiroki Tsumoto
- Research Team for Mechanism of Aging, TMIG, Tokyo, Japan
| | - Takuya Omura
- Research Team for Geriatric Medicine, Tokyo Metropolitan Institute of Gerontology (TMIG), Tokyo, Japan
| | - Yuri Miura
- Research Team for Mechanism of Aging, TMIG, Tokyo, Japan
| | - Seijiro Mori
- Research Team for Geriatric Medicine, Tokyo Metropolitan Institute of Gerontology (TMIG), Tokyo, Japan
| | - Mana Higashihara
- Department of Neurology, Tokyo Metropolitan Geriatric Hospital, Tokyo (TMGHIG), Japan
| | | | - Kazuhiro Shigemoto
- Research Team for Geriatric Medicine, Tokyo Metropolitan Institute of Gerontology (TMIG), Tokyo, Japan.
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Takizawa T, Ohtani S, Watanabe N, Miyazaki N, Ishizuchi K, Sekiguchi K, Iba C, Shibata M, Takemura R, Hori S, Nakahara J. Real-world evidence of galcanezumab for migraine treatment in Japan: a retrospective analysis. BMC Neurol 2022; 22:512. [PMID: 36585619 PMCID: PMC9805082 DOI: 10.1186/s12883-022-03041-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Accepted: 12/21/2022] [Indexed: 01/01/2023] Open
Abstract
OBJECTIVE To evaluate the efficacy and safety of galcanezumab in patients with migraine in a real-world setting in Japan. BACKGROUND Galcanezumab is the first anti-calcitonin gene-related peptide monoclonal antibody approved in Japan. To the best of our knowledge, no real-world studies on galcanezumab have been published in any international journal from Japan. METHODS We retrospectively examined patients with migraine who received three doses of galcanezumab between August 2021 and February 2022 at the Keio University Hospital. We assessed changes in monthly migraine days, responder rate, and migraine-associated and premonitory symptoms. We also investigated injection site reactions and adverse events. RESULTS Fifty-two patients received three doses of galcanezumab during the study period. Compared with those at baseline, the monthly migraine days decreased by 5.9 days (95% confidence interval, 4.2-7.7) at 3 months. The 50% responder rate was 61.5% at 3 months. A total of 64.9%, 50.0%, and 63.9% of patients showed improvement in the severity of photophobia, phonophobia, and nausea/vomiting, respectively. Premonitory symptoms without subsequent headache were reported in 62.5% of patients. Moreover, injection site reaction was the most common adverse event (34.6%). CONCLUSION This study revealed the efficacy and safety of galcanezumab for migraineurs in Japan. Galcanezumab also improved migraine-associated symptoms. However, despite a reduction in headaches, premonitory symptoms without subsequent headache were reported in > 50% of the patients at 3 months.
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Affiliation(s)
- Tsubasa Takizawa
- grid.26091.3c0000 0004 1936 9959Department of Neurology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-Ku, Tokyo, 160-8582 Japan
| | - Seiya Ohtani
- grid.26091.3c0000 0004 1936 9959Department of Neurology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-Ku, Tokyo, 160-8582 Japan ,grid.26091.3c0000 0004 1936 9959Division of Drug Informatics, Keio University Faculty of Pharmacy, Tokyo, Japan
| | - Narumi Watanabe
- grid.26091.3c0000 0004 1936 9959Department of Neurology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-Ku, Tokyo, 160-8582 Japan
| | - Naoki Miyazaki
- grid.412096.80000 0001 0633 2119Biostatistics Unit, Clinical and Translational Research Center, Keio University Hospital, Tokyo, Japan
| | - Kei Ishizuchi
- grid.26091.3c0000 0004 1936 9959Department of Neurology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-Ku, Tokyo, 160-8582 Japan
| | - Koji Sekiguchi
- grid.26091.3c0000 0004 1936 9959Department of Neurology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-Ku, Tokyo, 160-8582 Japan
| | - Chisato Iba
- grid.26091.3c0000 0004 1936 9959Department of Neurology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-Ku, Tokyo, 160-8582 Japan
| | - Mamoru Shibata
- grid.417073.60000 0004 0640 4858Department of Neurology, Tokyo Dental College Ichikawa General Hospital, Chiba, Japan
| | - Ryo Takemura
- grid.412096.80000 0001 0633 2119Biostatistics Unit, Clinical and Translational Research Center, Keio University Hospital, Tokyo, Japan
| | - Satoko Hori
- grid.26091.3c0000 0004 1936 9959Division of Drug Informatics, Keio University Faculty of Pharmacy, Tokyo, Japan
| | - Jin Nakahara
- grid.26091.3c0000 0004 1936 9959Department of Neurology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-Ku, Tokyo, 160-8582 Japan
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Sekiguchi K, Ishizuchi K, Takizawa T, Motegi H, Oyama M, Nakahara J, Suzuki S. Anemia in female patients with myasthenia gravis. PLoS One 2022; 17:e0273720. [PMID: 36067203 PMCID: PMC9447896 DOI: 10.1371/journal.pone.0273720] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Accepted: 08/11/2022] [Indexed: 11/23/2022] Open
Abstract
Myasthenia gravis (MG) is the most common autoimmune neuromuscular disorder, and is more common in women than in men. Anemia is also more common in women. The purpose of this study was to investigate factors associated with anemia and the negative impact of anemia in female MG patients. We investigated factors related to MG and anemia in 215 female patients with MG, who were attending the MG clinic of Keio Hospital between January and December 2021. We statistically evaluated clinical factors related to anemia in patients with and without anemia. Eighty-five patients (40%) had anemia in the past, and 130 patients did not have anemia in the past. There were no significant differences in age at study, age at MG onset, body mass index, or frequency of autoantibodies between the anemia and non-anemia groups. MG severity evaluated by the MG Foundation of America classification was greater in the anemia group than in the non-anemia group. History of anemia was associated with immunosuppressive treatment, such as prednisolone and calcineurin inhibitor treatment. There was a correlation between hemoglobin levels and the MG-quality of life score. Long term immunosuppressive therapy can cause anemia in female MG patients. Anemia may negatively affect the quality of life of female MG patients.
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Affiliation(s)
- Koji Sekiguchi
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan
| | - Kei Ishizuchi
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan
| | - Tsubasa Takizawa
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan
| | - Haruhiko Motegi
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan
- Department of Neurology, The Jikei University School of Medicine, Tokyo, Japan
| | - Munenori Oyama
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan
| | - Jin Nakahara
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan
| | - Shigeaki Suzuki
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan
- * E-mail:
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10
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Ishizuchi K, Takizawa T, Ohnuki Y, Sekiguchi K, Motegi H, Oyama M, Nakahara J, Shiina T, Suzuki S. Immunodeficiency in patients with thymoma-associated myasthenia gravis. J Neuroimmunol 2022; 371:577950. [PMID: 35994947 DOI: 10.1016/j.jneuroim.2022.577950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 06/07/2022] [Revised: 08/06/2022] [Accepted: 08/09/2022] [Indexed: 11/25/2022]
Abstract
Thymoma with immunodeficiency is sometimes accompanied by myasthenia gravis (MG), but the clinical characteristics have not been elucidated. This study aimed to characterize its clinical and immunological features. Of the 132 thymoma-associated MG patients, 9 patients presented with immunodeficiency. All suffered from severe pneumonia, and most had invasive thymoma and autoimmune disorders. DRB1*08:03 and DQB1*06:01 alleles were frequently detected. Compared to group without immunodeficiency, they showed no significant differences in the severity of MG, significantly lower IgG concentrations and higher mortality rate. Thymoma-associated MG with immunodeficiency is a distinct subset requiring special attention to prevent infection during the follow-up period.
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Affiliation(s)
- Kei Ishizuchi
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan.
| | - Tsubasa Takizawa
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan.
| | - Yuko Ohnuki
- Department of Medical Ethics, Tokai University School of Medicine, Kanagawa, Japan; Department of Clinical Genetics, Tokai University School of Medicine, Kanagawa, Japan.
| | - Koji Sekiguchi
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan.
| | - Haruhiko Motegi
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan; Department of Neurology, The Jikei University School of Medicine, Tokyo, Japan.
| | - Munenori Oyama
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan.
| | - Jin Nakahara
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan.
| | - Takashi Shiina
- Department of Molecular Life Science, Tokai University School of Medicine, Kanagawa, Japan.
| | - Shigeaki Suzuki
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan.
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11
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Ishizuchi K, Takizawa T, Sekiguchi K, Motegi H, Oyama M, Nakahara J, Suzuki S. Flare of myasthenia gravis induced by COVID-19 vaccines. J Neurol Sci 2022; 436:120225. [PMID: 35290838 PMCID: PMC8906005 DOI: 10.1016/j.jns.2022.120225] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 02/11/2022] [Accepted: 03/07/2022] [Indexed: 11/29/2022]
Affiliation(s)
- Kei Ishizuchi
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan.
| | - Tsubasa Takizawa
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan.
| | - Koji Sekiguchi
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan.
| | - Haruhiko Motegi
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan; Department of Neurology, The Jikei University School of Medicine, Tokyo, Japan.
| | - Munenori Oyama
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan.
| | - Jin Nakahara
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan.
| | - Shigeaki Suzuki
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan.
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12
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Isago E, Ishizuchi K, Takizawa T, Fujiwara H, Izawa Y, Nakahara J. [A case of neuromyelitis optica spectrum disorder in which headache preceded visual field disturbances by 2 months]. Rinsho Shinkeigaku 2021; 61:722-726. [PMID: 34657917 DOI: 10.5692/clinicalneurol.cn-001607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
A quinquagenarian woman visited our hospital due to experiencing headache around the right upper eyelid for the previous 2 months. T2-weighted MRI of the head showed multiple high-signal-intensity lesions in the corpus callosum and bilateral corona radiata. She was thought to have an autoimmune disease and was treated with steroid pulse therapy, but the light reflex of the right eye diminished and the patient developed inferior horizontal hemianopsia. T2-weighted orbital MRI showed an enlarged right optic nerve, a high-intensity signal in the superior half of the optic nerve, and an enhancing effect. She also tested positive for anti-aquaporin 4 antibodies, so she was diagnosed with neuromyelitis optica spectrum disorder (NMOSD). This case shows that headache can be an initial symptom of NMOSD and that clinicians should consider NMOSD when attempting to diagnose patients presenting with headaches.
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Affiliation(s)
- Eimi Isago
- Department of Neurology, Keio University School of Medicine
| | - Kei Ishizuchi
- Department of Neurology, Keio University School of Medicine
| | | | - Hirokazu Fujiwara
- Department of Diagnostic Radiology, Keio University School of Medicine
| | | | - Jin Nakahara
- Department of Neurology, Keio University School of Medicine
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13
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Sekiguchi K, Watanabe N, Miyazaki N, Ishizuchi K, Iba C, Tagashira Y, Uno S, Shibata M, Hasegawa N, Takemura R, Nakahara J, Takizawa T. Incidence of headache after COVID-19 vaccination in patients with history of headache: A cross-sectional study. Cephalalgia 2021; 42:266-272. [PMID: 34407651 PMCID: PMC8988452 DOI: 10.1177/03331024211038654] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Headache is an adverse event of coronavirus 2019 (COVID-19) vaccination. Whether patients with history of headache suffer more from vaccination-induced headaches is unknown. We aimed to uncover if headache patients develop more headaches after COVID-19 mRNA vaccination than healthy controls. METHODS We performed a questionnaire survey for nursing staff in our hospital from April to May 2021. Based on baseline characteristics, we divided the participants into migraine, non-migrainous headache, and healthy control, and examined the occurrence and features of headache after COVID-19 vaccinations. RESULTS We included 171 participants (15.2% migraine and 24.6% non-migrainous headache). Headache incidence after vaccinations was significantly higher in the migraine (69.2%) and non-migrainous headache (71.4%) groups than in the healthy control (37.9%) group. The incidence of headaches was significantly higher after the second dose compared to the first (45.6% vs. 20.5%). CONCLUSION Migraineurs and non-migrainous headache participants developed more headaches compared to the healthy controls after COVID-19 vaccination.
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Affiliation(s)
- Koji Sekiguchi
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan
| | - Narumi Watanabe
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan
| | - Naoki Miyazaki
- Biostatistics Unit, Clinical and Translational Research Center, Keio University Hospital, Tokyo, Japan
| | - Kei Ishizuchi
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan
| | - Chisato Iba
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan
| | - Yu Tagashira
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan
| | - Shunsuke Uno
- Department of Infectious Diseases, Keio University School of Medicine, Tokyo, Japan
| | - Mamoru Shibata
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan.,Department of Neurology, Tokyo Dental College Ichikawa General Hospital, Chiba, Japan
| | - Naoki Hasegawa
- Department of Infectious Diseases, Keio University School of Medicine, Tokyo, Japan
| | - Ryo Takemura
- Biostatistics Unit, Clinical and Translational Research Center, Keio University Hospital, Tokyo, Japan
| | - Jin Nakahara
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan
| | - Tsubasa Takizawa
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan
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14
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Ishizuchi K, Takizawa T, Tezuka T, Takahata K, Seki M, Tabuchi H, Ueda R, Kubota M, Mimura M, Nakahara J, Ito D. A case of progressive supranuclear palsy with predominant cerebellar ataxia diagnosed by [ 18F]PM-PBB3 tau PET. J Neurol Sci 2021; 425:117440. [PMID: 33866113 DOI: 10.1016/j.jns.2021.117440] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 03/18/2021] [Accepted: 04/05/2021] [Indexed: 10/21/2022]
Affiliation(s)
- Kei Ishizuchi
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan
| | - Tsubasa Takizawa
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan
| | - Toshiki Tezuka
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan
| | - Keisuke Takahata
- Department of Neuropsychiatry, Keio University School of Medicine, Tokyo, Japan; Department of Functional Brain Imaging Research, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan
| | - Morinobu Seki
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan
| | - Hajime Tabuchi
- Department of Neuropsychiatry, Keio University School of Medicine, Tokyo, Japan
| | - Ryo Ueda
- Department of Radiology, Keio University School of Medicine, Tokyo, Japan
| | - Masahito Kubota
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan
| | - Masaru Mimura
- Department of Neuropsychiatry, Keio University School of Medicine, Tokyo, Japan
| | - Jin Nakahara
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan
| | - Daisuke Ito
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan.
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