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Severcan F, Ozyurt I, Dogan A, Severcan M, Gurbanov R, Kucukcankurt F, Elibol B, Tiftikcioglu I, Gursoy E, Yangin MN, Zorlu Y. Decoding myasthenia gravis: advanced diagnosis with infrared spectroscopy and machine learning. Sci Rep 2024; 14:19316. [PMID: 39164310 PMCID: PMC11336246 DOI: 10.1038/s41598-024-66501-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Accepted: 07/02/2024] [Indexed: 08/22/2024] Open
Abstract
Myasthenia Gravis (MG) is a rare neurological disease. Although there are intensive efforts, the underlying mechanism of MG still has not been fully elucidated, and early diagnosis is still a question mark. Diagnostic paraclinical tests are also time-consuming, burden patients financially, and sometimes all test results can be negative. Therefore, rapid, cost-effective novel methods are essential for the early accurate diagnosis of MG. Here, we aimed to determine MG-induced spectral biomarkers from blood serum using infrared spectroscopy. Furthermore, infrared spectroscopy coupled with multivariate analysis methods e.g., principal component analysis (PCA), support vector machine (SVM), discriminant analysis and Neural Network Classifier were used for rapid MG diagnosis. The detailed spectral characterization studies revealed significant increases in lipid peroxidation; saturated lipid, protein, and DNA concentrations; protein phosphorylation; PO2-asym + sym /protein and PO2-sym/lipid ratios; as well as structural changes in protein with a significant decrease in lipid dynamics. All these spectral parameters can be used as biomarkers for MG diagnosis and also in MG therapy. Furthermore, MG was diagnosed with 100% accuracy, sensitivity and specificity values by infrared spectroscopy coupled with multivariate analysis methods. In conclusion, FTIR spectroscopy coupled with machine learning technology is advancing towards clinical translation as a rapid, low-cost, sensitive novel approach for MG diagnosis.
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Affiliation(s)
- Feride Severcan
- Department of Biophysics, Faculty of Medicine, Altinbas University, Istanbul, Türkiye.
| | - Ipek Ozyurt
- Department of Biophysics, Faculty of Medicine, Altinbas University, Istanbul, Türkiye
| | - Ayca Dogan
- Department of Physiology, Faculty of Medicine, Altinbas University, Istanbul, Türkiye
| | - Mete Severcan
- Department of Electrical and Electronics Engineering, Middle East Technical University, Ankara, Türkiye
| | - Rafig Gurbanov
- Department of Bioengineering, Faculty of Engineering, Bilecik Seyh Edebali University, Bilecik, Türkiye
| | - Fulya Kucukcankurt
- Department of Medical Biology, Faculty of Medicine, Altinbas University, Istanbul, Türkiye
| | - Birsen Elibol
- Department of Medical Biology, Faculty of Medicine, Istanbul Medeniyet University, Istanbul, Türkiye
- Department of Medical Biology, Faculty of Medicine, Bezmialem Vakif University, Istanbul, Türkiye
| | - Irem Tiftikcioglu
- Cigli Training and Research Hospital, Neurology Clinic, Bakircay University, İzmir, Türkiye
| | - Esra Gursoy
- Department of Neurology, Faculty of Medicine, Bezmialem Vakif University, Istanbul, Türkiye
- Basaksehir Cam and Sakura City Hospital, Neurology Clinics, Istanbul, Türkiye
| | - Melike Nur Yangin
- Biomedical Sciences Graduate Program, Institute of Graduate Studies, Altinbas University, Istanbul, Türkiye
| | - Yasar Zorlu
- Tepecik Educational and Training Hospital, Neurology Department, University of Health Sciences, Izmir, Türkiye
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Chae J, Nguyen TT, Oh SY. Quantification of saccadic fatigability and diagnostic efficacy for myasthenia gravis. J Neurol 2024; 271:5035-5045. [PMID: 38796801 DOI: 10.1007/s00415-024-12461-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2024] [Revised: 05/15/2024] [Accepted: 05/16/2024] [Indexed: 05/29/2024]
Abstract
BACKGROUND AND OBJECTIVES The diagnostic challenge of myasthenia gravis (MG) is exacerbated by the variable efficacy of current testing methodologies, necessitating innovative approaches to accurately identify the condition. This study aimed to assess ocular muscle fatigue in patients with MG using video-oculography (VOG) by examining repetitive saccadic eye movements and comparing these metrics to those of healthy control participants. METHODS This prospective, cross-sectional study was conducted at a tertiary care center and involved 62 patients diagnosed with MG (48 with ocular MG and 14 with generalized MG) and a control group of 31 healthy individuals, matched for age and sex. The assessment involved recording saccadic eye movements within a ± 15° range, both horizontally and vertically, at a rate of 15 saccades per minute over a 5-min period, resulting in 75 cycles. Participants were afforded a 3-min rest interval between each set to mitigate cumulative fatigue. The primary outcome was the detection of oculomotor fatigue, assessed through changes in saccadic waveforms, range, peak velocity, latency, and the duration from onset to target, with a focus on comparing the second saccade against the average of the last five saccades. RESULTS In the evaluation of repetitive saccadic movements, patients with MG exhibited a reduced saccadic range and a prolonged duration to reach the target, compared to healthy subjects. Furthermore, a significant elevation in the frequency of multistep saccades was observed among MG patients, with a marked rise observed over consecutive trials. Receiver operating characteristic (ROC) analysis revealed the discriminative performance of multistep saccade frequency, in conjunction with variations in saccadic range and duration from onset to target achievement between the second saccade and the mean of the final five saccades, as effective in distinguishing MG patients from healthy subjects. Although alterations in peak saccadic velocity and latency were less pronounced, they were nevertheless detectable. DISCUSSION The utilization of VOG for repetitive saccadic testing in the diagnosis of MG has demonstrated considerable diagnostic precision. This methodology affords significant accuracy in evaluating ocular muscle fatigue in MG patients, providing class III evidence supportive of its clinical application.
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Affiliation(s)
- Juhee Chae
- Department of Neurology, Jeonbuk National University College of Medicine, Jeonbuk National University Hospital, Jeonbuk National University School of Medicine, 20 Geonji-ro, Deokjin-Gu, Jeonju, 54907, Republic of Korea
- Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju, South Korea
| | - Thanh Tin Nguyen
- Department of Pharmacology, Hue University of Medicine and Pharmacy, Hue University, Hue, Vietnam
| | - Sun-Young Oh
- Department of Neurology, Jeonbuk National University College of Medicine, Jeonbuk National University Hospital, Jeonbuk National University School of Medicine, 20 Geonji-ro, Deokjin-Gu, Jeonju, 54907, Republic of Korea.
- Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju, South Korea.
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Darer JD, Pesa J, Choudhry Z, Batista AE, Parab P, Yang X, Govindarajan R. Characterizing Myasthenia Gravis Symptoms, Exacerbations, and Crises From Neurologist's Clinical Notes Using Natural Language Processing. Cureus 2024; 16:e65792. [PMID: 39219871 PMCID: PMC11361825 DOI: 10.7759/cureus.65792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/29/2024] [Indexed: 09/04/2024] Open
Abstract
Background Myasthenia gravis (MG) is a rare, autoantibody neuromuscular disorder characterized by fatigable weakness. Real-world evidence based on administrative and structured datasets regarding MG may miss important details related to the clinical encounter. Examination of free-text clinical progress notes has the potential to illuminate aspects of MG care. Objective The primary objective was to examine and characterize neurologist progress notes in the care of individuals with MG regarding the prevalence of documentation of clinical subtypes, antibody status, symptomatology, and MG deteriorations, including exacerbations and crises. The secondary objectives were to categorize MG deteriorations into practical, objective states as well as examine potential sources of clinical inertia in MG care. Methods We performed a retrospective, cross-sectional analysis of de-identified neurologist clinical notes from 2017 to 2022. A qualitative analysis of physician descriptions of MG deteriorations and a discussion of risks in MG care (risk for adverse effects, risk for clinical decompensation, etc.) was performed. Results Of the 3,085 individuals with MG, clinical subtypes and antibody status identified included gMG (n = 400; 13.0%), ocular MG (n = 253; 8.2%), MG unspecified (2,432; 78.8%), seropositivity for acetylcholine receptor antibody (n = 441; 14.3%), and MuSK antibody (n = 29; 0.9%). The most common gMG manifestations were dysphagia (n = 712; 23.0%), dyspnea (n = 626; 20.3%), and dysarthria (n = 514; 16.7%). In MG crisis patients, documentation of difficulties with MG standard therapies was common (n = 62; 45.2%). The qualitative analysis of MG deterioration types includes symptom fluctuation, symptom worsening with treatment intensification, MG deterioration with rescue therapy, and MG crisis. Qualitative analysis of MG-related risks included the toxicity of new therapies and concern for worsening MG because of changing therapies. Conclusions This study of neurologist progress notes demonstrates the potential for real-world evidence generation in the care of individuals with MG. MG patients suffer fluctuating symptomatology and a spectrum of clinical deteriorations. Adverse effects of MG therapies are common, highlighting the need for effective, less toxic treatments.
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Affiliation(s)
| | - Jacqueline Pesa
- Real World Value and Evidence, Immunology, Janssen Scientific Affairs, Titusville, USA
| | - Zia Choudhry
- Rare Antibody Diseases, Janssen Scientific Affairs, Titusville, USA
| | | | - Purva Parab
- Biostatistics, Health Analytics, Clarksville, USA
| | - Xiaoyun Yang
- Biostatistics, Health Analytics, Clarksville, USA
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Dietlein WL, Dickey Z, Aldret S. Should We Consider Routine Blood Work for Diplopia and Ptosis in a Primary Care Setting? Cureus 2024; 16:e60521. [PMID: 38882969 PMCID: PMC11180514 DOI: 10.7759/cureus.60521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Accepted: 05/16/2024] [Indexed: 06/18/2024] Open
Abstract
Myasthenia gravis (MG) is a rare disorder that most commonly presents with ocular symptoms. Despite the highly sensitive blood work that can be used to diagnose the disease, it is frequently misdiagnosed until the disease becomes systemic. Literature, however, shows that those who begin treatment with acetylcholinesterase inhibitors before systemic presentation have a better prognosis. We discuss the case of a patient who presented to the clinic with a chief complaint of diplopia that was subsequently referred to ophthalmology. It was not until lab work was done by a subspecialist that the diagnosis of MG was made. The patient quickly responded to an acetylcholinesterase inhibitor and has since had a great prognosis. Here, we are advocating for the inclusion of routine lab work in the evaluation of patients who present to the primary care setting with diplopia in the absence of red flag symptoms. This approach aids in deciphering the potential involvement of MG in diplopia or ptosis. While such symptoms justify referral to ophthalmology, logistical challenges often hinder a prompt evaluation. Early diagnosis with the incorporation of routine lab work offers the potential to expedite the diagnosis of a rare disease. In doing so, providers can improve prognosis and potentially mitigate additive medical consultations.
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Affiliation(s)
- William L Dietlein
- Family Medicine, Edward Via College of Osteopathic Medicine, Monroe, USA
| | - Zachary Dickey
- Family Medicine, Edward Via College of Osteopathic Medicine, Monroe, USA
| | - Stephanie Aldret
- Family Medicine, Edward Via College of Osteopathic Medicine, Monroe, USA
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Garabet R, Herr S, Griffin N, Reddy K. Statin-induced immune-mediated necrotizing myopathy with concomitant increase of anti-HMGCR and anti-ACHR antibodies. Rheumatol Int 2024; 44:955-959. [PMID: 38461445 DOI: 10.1007/s00296-024-05559-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2024] [Accepted: 02/09/2024] [Indexed: 03/12/2024]
Abstract
Statin-induced immune-mediated necrotizing myopathy (IMNM) is a rare systemic neuromuscular condition. We present a case of a patient with a severe phenotype of the disease that was found to have an increase in anti-HMGCR and anti-ACHR antibodies. A potential association between these antibodies have not been previously described. A 67-year-old male with hyperlipidemia, who was recently initiated on atorvastatin therapy, presented to the ED with progressive muscle weakness. Within a few days of admission, the patient developed complete flaccid paralysis and respiratory distress requiring intubation. The patient's CK was elevated to 24,000 and there was an increase of anti-HMGCR and anti-ACHR antibodies. Impressions from MRI and thigh biopsy solidified a diagnosis of statin-induced IMNM. The patient was treated with methylprednisolone, IVIG, and rituximab, which provided resolution of symptoms.
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Affiliation(s)
- Razmig Garabet
- Medical Student, Drexel University College of Medicine, Philadelphia, PA, USA.
| | - Sanjeev Herr
- Medical Student, Drexel University College of Medicine, Philadelphia, PA, USA
| | - Nicole Griffin
- Department of Rheumatology, Kaiser Permanente Northern California, Walnut Creek, CA, USA
| | - Kuruganti Reddy
- Department of Pulmonary Medicine, Kaiser Permanente Northern California, Walnut Creek, CA, USA
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Winther JB, Morgen JJ, Skov M, Broch-Lips MG, Nielsen OB, Overgaard K, Pedersen TH. Role of recovery of acetylcholine release in compromised neuromuscular junction function. Neuromuscul Disord 2024; 36:48-59. [PMID: 38359767 DOI: 10.1016/j.nmd.2024.01.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 12/17/2023] [Accepted: 01/22/2024] [Indexed: 02/17/2024]
Abstract
Everyday physical activities, such as walking, are enabled by repeated skeletal muscle contractions and require a well-functioning neuromuscular transmission. In myasthenic disorders, activities of daily living are debilitated by a compromised neuromuscular transmission leading to muscle weakness and fatiguability in patients. To enable physical activity, acetylcholine (ACh) is released repeatedly from the motor nerve, however, the role of the nerve terminals' capacity to sustain ACh release to support repetitive contractions under compromised neuromuscular transmission remains unclear. To explore this, we studied synaptic and contractile function during repeated contractions in healthy rat skeletal muscles under conditions of pharmacological induced compromised neuromuscular transmission. Using recordings of endplate potentials, compound muscle action potential (CMAP) and force production in isolated skeletal muscles and living, anesthetized animals, we found that force and CMAP were markedly reduced by even very light activity performed up to 5 s prior to contraction showing that recovery of ACh release was insufficient to maintain synaptic transmission strength. Our results suggest that the timing of depletion and restoration of ACh release may impact clinical signs of weakness and fatigability in patients with impaired neuromuscular transmission and affect the sensitivity of electromyographic recordings in the clinic.
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Affiliation(s)
| | | | - Martin Skov
- NMD Pharma A/S, Palle Juul-Jensens Blvd. 82, 8200 Aarhus N, Denmark
| | | | - Ole Bækgaard Nielsen
- Department of Public Health, Aarhus University, Bartholins Allé 2, 8000 Aarhus C, Denmark
| | - Kristian Overgaard
- Department of Public Health, Aarhus University, Bartholins Allé 2, 8000 Aarhus C, Denmark
| | - Thomas Holm Pedersen
- NMD Pharma A/S, Palle Juul-Jensens Blvd. 82, 8200 Aarhus N, Denmark; Department of Biomedicine, Aarhus University, Ole Worms Allé 4, 8000 Aarhus C, Denmark.
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Khan AA, Mumtaz S, Malik J, Manzoor MS, Maqbool F, Shafique M, Nazir M, Ibn‐e‐Shad Z, Kandel K. Primary Sjogren's syndrome presenting as ptosis and eyelid swelling: A case report. Clin Case Rep 2024; 12:e8554. [PMID: 38405359 PMCID: PMC10890969 DOI: 10.1002/ccr3.8554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 12/10/2023] [Accepted: 01/29/2024] [Indexed: 02/27/2024] Open
Abstract
Key Clinical Message This unique case report of primary Sjogren's syndrome (pSS) shows bilateral ptosis and significant periorbital edema, compromising vision. To avoid misleading diagnosis, antibody tests must be evaluated and interpreted in the context of clinical findings. Abstract Primary Sjögren's syndrome is an idiopathic, autoimmune disorder involving the lacrimal and salivary glands characterized by both localized and systemic manifestations including xerostomia and keratoconjunctivitis sicca. Myasthenia Gravis (MG) is also an autoimmune disorder characterized by the development of auto-antibodies against nicotinic acetylcholine receptors that causes decreased muscle response to stimulation. It usually presents with ptosis and generalized body weakness. Ophthalmological involvement is common in both disorders but ptosis is very rarely seen in pSS. We report the case of a 27-year-old woman presenting to our clinic with the complaint of ptosis and eyelid swelling. She also had a positive anti-acetylcholine receptor antibody test and her initial presentation mimicked Myasthenia Gravis. Her autoimmune workup revealed a positive titer of Anti Ro SSA antibodies. Myasthenia Gravis was ruled out on electrodiagnostic studies which showed no decremental response, and pSS was confirmed on lip biopsy. Our case highlights that it is important to interpret the antibody test results in the context of clinical findings as we can have spurious results in autoimmune diseases. Autoimmune conditions can have varying presenting complaints hence, clinical judgment should always overrule diagnostic investigations and should thus guide patient management.
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Affiliation(s)
| | | | | | | | | | | | | | - Zohad Ibn‐e‐Shad
- Department of Internal MedicineShifa International HospitalIslamabadPakistan
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Toshniwal S, Wanjari A, Acharya S, Kumar S, Sontakke T. Myasthenia Gravis Mimicking Status Asthmaticus: The Hidden Crisis. Cureus 2024; 16:e53044. [PMID: 38410338 PMCID: PMC10895900 DOI: 10.7759/cureus.53044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Accepted: 01/27/2024] [Indexed: 02/28/2024] Open
Abstract
Status asthmaticus is a severe form of aggravation of asthma, whereas myasthenia gravis (MG) is a rare neuromuscular condition characterised by exhaustion and muscle weakness. Myasthenic crisis can occasionally manifest with symptoms that resemble status asthmaticus, which can result in an incorrect diagnosis and ineffective therapy. In addition to discussing the therapeutic implications, this abstract attempts to draw attention to the difficulties in distinguishing between status asthmaticus and myasthenia crisis and the importance of diagnosing subtle signs of MG. In this case, we present a 55-year-old female, with a misdiagnosed case of bronchial asthma, who presented with shortness of breath at rest for two to three days and was suspected to have an acute exacerbating episode of asthma. She was later evaluated for non-respiratory causes of dyspnea on noticing subtle signs of ptosis and was found to have an active myasthenic crisis. Although this case presented typically as status asthmaticus, it did not respond to conventional treatment of it, and on the contrary, it worsened. Hence, it is necessary to look for subtle signs of MG and promptly differentiate it from other similar emergency events to help administer accurate treatment which can prove life-saving.
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Affiliation(s)
- Saket Toshniwal
- Medicine, Jawaharlal Nehru Medical College, Datta Meghe Institute of Higher Education and Research, Wardha, IND
| | - Anil Wanjari
- Medicine, Jawaharlal Nehru Medical College, Datta Meghe Institute of Higher Education and Research, Wardha, IND
| | - Sourya Acharya
- Medicine, Jawaharlal Nehru Medical College, Datta Meghe Institute of Higher Education and Research, Wardha, IND
| | - Sunil Kumar
- Medicine, Jawaharlal Nehru Medical College, Datta Meghe Institute of Higher Education and Research, Wardha, IND
| | - Tushar Sontakke
- Medicine, Jawaharlal Nehru Medical College, Datta Meghe Institute of Higher Education and Research, Wardha, IND
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Mihalache OA, Vilciu C, Petrescu DM, Petrescu C, Manea MC, Ciobanu AM, Ciobanu CA, Popa-Velea O, Riga S. Depression: A Contributing Factor to the Clinical Course in Myasthenia Gravis Patients. MEDICINA (KAUNAS, LITHUANIA) 2023; 60:56. [PMID: 38256317 PMCID: PMC10819146 DOI: 10.3390/medicina60010056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 12/22/2023] [Accepted: 12/26/2023] [Indexed: 01/24/2024]
Abstract
Background and Objectives: The association between myasthenia gravis (MG) and depression is intricate and characterized by bidirectional causality. In this regard, MG can be a contributing factor to depression and, conversely, depression may worsen the symptoms of MG. This study aimed to identify any differences in the progression of the disease among patients with MG who were also diagnosed with depression as compared to those without depression. Our hypothesis focused on the theory that patients with more severe MG symptoms may have a higher likelihood of suffering depression at the same time. Materials and Methods: One hundred twenty-two male and female patients (N = 122) aged over 18 with a confirmed diagnosis of autoimmune MG who were admitted to the Neurology II department of Myasthenia Gravis, Clinical Institute Fundeni in Bucharest between January 2019 and December 2020, were included in the study. Patients were assessed at baseline and after six months. The psychiatric assessment of the patients included the Hamilton Depression Rating Scale-17 items (HAM-D), and neurological status was determined with two outcome measures: Quantitative Myasthenia Gravis (QMG) and Myasthenia Gravis Activities of Daily Life (MG-ADL). The patients were divided into two distinct groups as follows: group MG w/dep, which comprised 49 MG patients diagnosed with depressive disorder who were also currently receiving antidepressant medication, and group MG w/o dep, which consisted of 73 patients who did not have depression. Results: In our study, 40.16% of the myasthenia gravis (MG) patients exhibited a comorbid diagnosis of depression. Among the MG patients receiving antidepressant treatment, baseline assessments revealed a mean MG-ADL score of 7.73 (SD = 5.05), an average QMG score of 18.40 (SD = 8.61), and a mean Ham-D score of 21.53 (SD = 7.49). After a six-month period, a statistically significant decrease was observed in the MG-ADL (2.92, SD = 1.82), QMG (7.15, SD = 4.46), and Ham-D scores (11.16, SD = 7.49) (p < 0.0001). These results suggest a significant correlation between MG severity and elevated HAM-D depression scores. Regarding the MG treatment in the group with depression, at baseline, the mean dose of oral corticosteroids was 45.10 mg (SD = 16.60). Regarding the treatment with pyridostigmine, patients with depression and undergoing antidepressant treatment remained with an increased need for pyridostigmine, 144.49 mg (SD = 51.84), compared to those in the group without depression, 107.67 mg (SD = 55.64, p < 0.001). Conclusions: Our investigation confirms that the occurrence of depressive symptoms is significantly widespread among individuals diagnosed with MG. Disease severity, along with younger age and higher doses of cortisone, is a significant factor associated with depression in patients with MG. Substantial reductions in MG-ADL and QMG scores were observed within each group after six months, highlighting the effectiveness of MG management. The findings suggest that addressing depressive symptoms in MG patients, in addition to standard MG management, can lead to improved clinical outcomes.
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Affiliation(s)
- Oana Antonia Mihalache
- Department of Doctoral Studies, “Carol Davila” University of Medicine and Pharmacy, 020021 Bucharest, Romania;
- Department of Neurology, “Fundeni” Clinical Institute, 022328 Bucharest, Romania;
| | - Crisanda Vilciu
- Department of Neurology, “Fundeni” Clinical Institute, 022328 Bucharest, Romania;
- Department of Neurology, “Carol Davila” University of Medicine and Pharmacy, 020021 Bucharest, Romania;
| | - Diana-Mihaela Petrescu
- Department of Neurology, “Carol Davila” University of Medicine and Pharmacy, 020021 Bucharest, Romania;
| | - Cristian Petrescu
- Department of Psychiatry, “Prof. Dr. Alexandru Obregia” Clinical Hospital of Psychiatry, 041914 Bucharest, Romania; (C.P.); (M.C.M.)
- Neuroscience Department, Discipline of Psychiatry, Faculty of Medicine, University of Medicine and Pharmacy “Carol Davila”, 020021 Bucharest, Romania
| | - Mihnea Costin Manea
- Department of Psychiatry, “Prof. Dr. Alexandru Obregia” Clinical Hospital of Psychiatry, 041914 Bucharest, Romania; (C.P.); (M.C.M.)
- Neuroscience Department, Discipline of Psychiatry, Faculty of Medicine, University of Medicine and Pharmacy “Carol Davila”, 020021 Bucharest, Romania
| | - Adela Magdalena Ciobanu
- Department of Psychiatry, “Prof. Dr. Alexandru Obregia” Clinical Hospital of Psychiatry, 041914 Bucharest, Romania; (C.P.); (M.C.M.)
- Neuroscience Department, Discipline of Psychiatry, Faculty of Medicine, University of Medicine and Pharmacy “Carol Davila”, 020021 Bucharest, Romania
| | | | - Ovidiu Popa-Velea
- Department of Medical Psychology, Faculty of Medicine, University of Medicine and Pharmacy “Carol Davila”, 050474 Bucharest, Romania;
| | - Sorin Riga
- Department of Stress Research and Prophylaxis, “Prof. Dr. Alexandru Obregia” Clinical Hospital of Psychiatry, 041914 Bucharest, Romania;
- Romanian Academy of Medical Sciences, 927180 Bucharest, Romania
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10
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Sansoni J, Menon N, Viali L, White S, Vucic S. Clinical features, treatments, their impact, and quality of life for Myasthenia Gravis patients in Australia. J Clin Neurosci 2023; 118:16-22. [PMID: 37844489 DOI: 10.1016/j.jocn.2023.09.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2023] [Revised: 07/07/2023] [Accepted: 09/28/2023] [Indexed: 10/18/2023]
Abstract
This survey provides an update on the experience of Myasthenia Gravis (MG) patients in Australia. Items were drawn from the 2011 Australian Survey and a 2019 US survey allowing for comparative discussion of survey findings. Patients were recruited through the Myasthenia Alliance Australia. Following consent, patients completed an online survey using REDCap software. Questions included demographics, clinical features, treatment side-effects and quality of life (QOL) scales. Samples for completion of survey sections ranged from N = 242-280 representing a power level of over 80%. Female and seronegative patients reported a significantly greater symptom load, earlier disease onset, longer time to diagnosis, more MG exacerbations, treatment side-effects, and poorer QOL. For exacerbation management there was a higher rate of oral corticosteroid use (66%), a lower use of Intravenous Immunoglobulin (IVIg, 47%) and particularly, Therapeutic Plasma Exchange (TPE, 4.5%) within this sample. Although steroid induced side-effects were rarer (9-34%), a comparatively high use of corticosteroids was reported for current and overall treatments including those for MG crises (52-83%). Common treatment side-effects reported by 57-85% of patients, included fatigue, weight gain, a decrease in the ability to fight infections, gastrointestinal symptoms, and muscle weakness. The impact of MG on daily activities and QOL was considerable, but those who had a thymectomy reported better QOL. The survey identified areas for potential practice improvement in MG treatments (corticosteroids, IVIg, TPE), particularly for exacerbation management, and review is recommended. Further research on gender and antibody status differentials regarding clinical features is required.
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Affiliation(s)
- Janet Sansoni
- Biological Data Science Institute, Australian National University, Acton, ACT 2601, Australia; Health Outcomes Collaboration, 2 Bramston St, Fadden, ACT 2904, Australia.
| | - Nidhi Menon
- Biological Data Science Institute, Australian National University, Acton, ACT 2601, Australia
| | - Lachlan Viali
- Biological Data Science Institute, Australian National University, Acton, ACT 2601, Australia
| | - Susan White
- Myasthenia Alliance Australia, 17 Aldridge Ave, Corrimal East, NSW 2518, Australia; Myasthenia Gravis Association of Queensland Inc., PO Box16, Mt Gravatt, Queensland 4122, Australia
| | - Steve Vucic
- Brain and Nerve Research Centre, University of Sydney Concord Clinical School, Concord, NSW 2139, Australia
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11
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Chang CC, Liu TC, Lu CJ, Chiu HC, Lin WN. Machine learning strategy for identifying altered gut microbiomes for diagnostic screening in myasthenia gravis. Front Microbiol 2023; 14:1227300. [PMID: 37829445 PMCID: PMC10565662 DOI: 10.3389/fmicb.2023.1227300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Accepted: 09/06/2023] [Indexed: 10/14/2023] Open
Abstract
Myasthenia gravis (MG) is a neuromuscular junction disease with a complex pathophysiology and clinical variation for which no clear biomarker has been discovered. We hypothesized that because changes in gut microbiome composition often occur in autoimmune diseases, the gut microbiome structures of patients with MG would differ from those without, and supervised machine learning (ML) analysis strategy could be trained using data from gut microbiota for diagnostic screening of MG. Genomic DNA from the stool samples of MG and those without were collected and established a sequencing library by constructing amplicon sequence variants (ASVs) and completing taxonomic classification of each representative DNA sequence. Four ML methods, namely least absolute shrinkage and selection operator, extreme gradient boosting (XGBoost), random forest, and classification and regression trees with nested leave-one-out cross-validation were trained using ASV taxon-based data and full ASV-based data to identify key ASVs in each data set. The results revealed XGBoost to have the best predicted performance. Overlapping key features extracted when XGBoost was trained using the full ASV-based and ASV taxon-based data were identified, and 31 high-importance ASVs (HIASVs) were obtained, assigned importance scores, and ranked. The most significant difference observed was in the abundance of bacteria in the Lachnospiraceae and Ruminococcaceae families. The 31 HIASVs were used to train the XGBoost algorithm to differentiate individuals with and without MG. The model had high diagnostic classification power and could accurately predict and identify patients with MG. In addition, the abundance of Lachnospiraceae was associated with limb weakness severity. In this study, we discovered that the composition of gut microbiomes differed between MG and non-MG subjects. In addition, the proposed XGBoost model trained using 31 HIASVs had the most favorable performance with respect to analyzing gut microbiomes. These HIASVs selected by the ML model may serve as biomarkers for clinical use and mechanistic study in the future. Our proposed ML model can identify several taxonomic markers and effectively discriminate patients with MG from those without with a high accuracy, the ML strategy can be applied as a benchmark to conduct noninvasive screening of MG.
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Affiliation(s)
- Che-Cheng Chang
- PhD Program in Nutrition and Food Science, Fu Jen Catholic University, New Taipei City, Taiwan
- Department of Neurology, Fu Jen Catholic University Hospital, Fu Jen Catholic University, New Taipei City, Taiwan
- Graduate Institute of Biomedical and Pharmaceutical Science, Fu Jen Catholic University, New Taipei City, Taiwan
| | - Tzu-Chi Liu
- Graduate Institute of Business Administration, Fu Jen Catholic University, New Taipei City, Taiwan
| | - Chi-Jie Lu
- Graduate Institute of Business Administration, Fu Jen Catholic University, New Taipei City, Taiwan
- Artificial Intelligence Development Center, Fu Jen Catholic University, New Taipei City, Taiwan
- Department of Information Management, Fu Jen Catholic University, New Taipei City, Taiwan
| | - Hou-Chang Chiu
- School of Medicine, Fu Jen Catholic University, New Taipei City, Taiwan
- Department of Neurology, Taipei Medical University, Shuang-Ho Hospital, New Taipei City, Taiwan
| | - Wei-Ning Lin
- Graduate Institute of Biomedical and Pharmaceutical Science, Fu Jen Catholic University, New Taipei City, Taiwan
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Sobierajski T, Lasek-Bal A, Krzystanek M, Gilhus NE. Diagnosis and therapy of myasthenia gravis-the patients' perspective: a cross-sectional study. Front Neurol 2023; 14:1214041. [PMID: 37602258 PMCID: PMC10437051 DOI: 10.3389/fneur.2023.1214041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Accepted: 07/25/2023] [Indexed: 08/22/2023] Open
Abstract
The survey aimed to explore patients' perspectives with myasthenia gravis (MG) toward the diagnosis made and the therapy used to treat MG. The survey was conducted with a quantitative method, using the CAWI technique. A total of 321 people participated in the survey. More than half of the respondents (56.4%) had suffered from MG for less than 10 years. In three out of 10 cases (30.9%), the diagnosis of MG lasted 3 years or longer. The diagnostic delay was significantly longer in female respondents than in the males (p = 0.029). Cholinergic drugs were used in 92.9% of cases initially, and as maintenance therapy in 84.3% of cases. Corticosteroids were used in initiating therapy (45.8%) and as maintenance therapy (46.4%). One in four respondents (25.5%) reported experiencing very strong and strong side effects after using steroids. The side effects from steroid therapy very strong or strong affected overall physical health in 55.9% of respondents, very strong or strong affected self-acceptance in 52%, to a very large or large extent on mental health in 47.1%, and to a very strong or strong extent influenced the performance of daily activities in 28.2%. More than half of the respondents (57.0%) had had a thymectomy. Seven out of 10 respondents (72.0%) declared that the therapy they were on at the time of the survey allowed them (to varying degrees) to control their course of MG. Low therapy acceptance and less well controlled MG was associated with a preference for non-tablet therapies (p = 0.045). Regular follow-up and cooperation with the specialist health care system should improve MG symptoms, activities of daily living, and quality of life.
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Affiliation(s)
- Tomasz Sobierajski
- The Center of Sociomedical Research, Faculty of Applied Social Sciences and Resocialization, University of Warsaw, Warsaw, Poland
| | - Anetta Lasek-Bal
- Department of Neurology, School of Health Sciences, Medical University of Silesia in Katowice, Katowice, Poland
- Department of Neurology, Upper-Silesian Medical Center of the Medical University of Silesia in Katowice, Katowice, Poland
| | - Marek Krzystanek
- Department and Clinic of Psychiatric Rehabilitation, Faculty of Medical Sciences in Katowice, Medical University of Silesia in Katowice, Katowice, Poland
| | - Nils E. Gilhus
- Department of Clinical Medicine, University of Bergen, Bergen, Norway
- Department of Neurology, Haukeland University Hospital, Bergen, Norway
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Tran D, Fair L, Baginski B, Aladegbami B, Leeds S, Ward M. Myasthenic crisis as an initial presentation of myasthenia gravis in an 81-year-old following endoscopic myotomy for Zenker's diverticulum. Proc AMIA Symp 2023; 36:514-517. [PMID: 37334091 PMCID: PMC10269386 DOI: 10.1080/08998280.2023.2201657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 04/01/2023] [Accepted: 04/02/2023] [Indexed: 06/20/2023] Open
Abstract
In this article, we present the case of a patient with previously undiagnosed myasthenia gravis who underwent an endoscopic procedure for Zenker's diverticulum. The patient was readmitted due to ongoing dysphagia and severe respiratory distress caused by myasthenic crisis. This case demonstrates that myasthenia gravis, although rare, can occur in elderly patients and present with other sequelae that may mask the underlying diagnosis.
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Affiliation(s)
- Daniel Tran
- Division of Minimally Invasive Surgery, Baylor University Medical Center, Dallas, Texas
- Texas A&M College of Medicine, Dallas, Texas
| | - Lucas Fair
- Division of Minimally Invasive Surgery, Baylor University Medical Center, Dallas, Texas
- Center for Advanced Surgery, Baylor Scott & White Health, Dallas, Texas
- Baylor Scott & White Research Institute, Dallas, Texas
| | - Bryana Baginski
- Division of Minimally Invasive Surgery, Baylor University Medical Center, Dallas, Texas
- Center for Advanced Surgery, Baylor Scott & White Health, Dallas, Texas
| | - Bola Aladegbami
- Division of Minimally Invasive Surgery, Baylor University Medical Center, Dallas, Texas
- Texas A&M College of Medicine, Dallas, Texas
- Center for Advanced Surgery, Baylor Scott & White Health, Dallas, Texas
| | - Steven Leeds
- Division of Minimally Invasive Surgery, Baylor University Medical Center, Dallas, Texas
- Texas A&M College of Medicine, Dallas, Texas
- Center for Advanced Surgery, Baylor Scott & White Health, Dallas, Texas
| | - Marc Ward
- Division of Minimally Invasive Surgery, Baylor University Medical Center, Dallas, Texas
- Texas A&M College of Medicine, Dallas, Texas
- Center for Advanced Surgery, Baylor Scott & White Health, Dallas, Texas
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Kapoor B, Gulati M, Gupta R, Singla RK. Microbiota dysbiosis and myasthenia gravis: Do all roads lead to Rome? Autoimmun Rev 2023; 22:103313. [PMID: 36918089 DOI: 10.1016/j.autrev.2023.103313] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Accepted: 03/09/2023] [Indexed: 03/14/2023]
Abstract
Dysregulated immune system with a failure to recognize self from non-self-antigens is one of the common pathogeneses seen in autoimmune diseases. The complex interplay of genetic and environmental factors is important for the occurrence and development of the disease. Among the environmental factors, disturbed gut microbiota (gut dysbiosis) has recently attracted particular attention, especially with advancement in human microbiome research. Although the alterations in microbiota have been seen in various autoimmune diseases, including those of nervous system, there is paucity of information on neuromuscular system diseases. Myasthenia gravis (MG) is one such rare autoimmune disease of neuromuscular junction, and is caused by generation of pathogenic autoantibodies to components of the postsynaptic muscle endplate. In the recent years, accumulating evidences have endorsed the key role of host microbiota, particularly those of gut, in the pathogenesis of MG. Differential microbiota composition, characterized by increased abundance of Fusobacteria, Bacteroidetes, and Proteobacteria, and decreased abundance of Actinobacteria and Firmicutes, has been seen in MG patients in comparison to healthy subjects. Disturbance of microbiota composition, particularly reduced ratio of Firmicutes/Bacteroidetes, alter the gut permeability, subsequently triggering the immunological response. Resultant reduction in levels of short chain fatty acids (SCFAs) is another factor contributing to the immunological response in MG patients. Modulation of gut microbiota via intervention of probiotics, prebiotics, synbiotics, postbiotics (metabiotics), and fecal microbiota transplantation (FMT) is considered to be the futuristic approach for the management of MG. This review summarizes the role of gut microbiota and their metabolites (postbiotics) in the progression of MG. Also, various bacteriotherapeutic approaches involving gut microbiota are discussed for the prevention of MG progression.
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Affiliation(s)
- Bhupinder Kapoor
- School of Pharmaceutical Sciences, Lovely Professional University, Phagwara, Punjab, India.
| | - Monica Gulati
- School of Pharmaceutical Sciences, Lovely Professional University, Phagwara, Punjab, India; Faculty of Health, Australian Research Centre in Complementary and Integrative Medicine, University of Technology Sydney, NSW 2007, Australia.
| | - Reena Gupta
- School of Pharmaceutical Sciences, Lovely Professional University, Phagwara, Punjab, India
| | - Rajeev K Singla
- Institutes for Systems Genetics, Frontiers Science Center for Disease-Related Molecular Network, West China Hospital, Sichuan University, Xinchuan Road, 2222, Chengdu, Sichuan, China; iGlobal Research and Publishing Foundation, New Delhi, India
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Seligman C, Chang YM, Luo J, Garden OA. Exploring the role of immune checkpoint inhibitors in the etiology of myasthenia gravis and Lambert-Eaton myasthenic syndrome: A systematic review. Front Neurol 2023; 13:1004810. [PMID: 36698907 PMCID: PMC9868566 DOI: 10.3389/fneur.2022.1004810] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Accepted: 12/12/2022] [Indexed: 01/11/2023] Open
Abstract
Background While immune checkpoint inhibitors (ICIs) have been revolutionary in the treatment of cancer, their administration has been associated with a variety of immune-related adverse events (irAEs), including myasthenia gravis (MG), and Lambert-Eaton myasthenic syndrome (LEMS). Objective To provide a comprehensive synthesis of the evidence supporting an etiological role for ICIs in MG and LEMS in patients with no prior history of autoimmune disease. Hypothesis ICIs may trigger MG and LEMS in patients with no prior susceptibility to autoimmune disease. Methods Relevant primary research on Medline was interrogated using a series of search algorithms. Search terms were constructed based on the PICOS tool endorsed by the Cochrane Collaboration, which describes population, intervention, comparison, outcomes, and study design. Papers were screened according to inclusion and exclusion criteria. Additional papers were retrieved from the reference lists of screened papers. Each paper included in the qualitative synthesis was assigned an integrated metric of evidence (IME) value, ranging from 0 to 7, based on study design, quality of data, likelihood of a causal link between the immune checkpoint inhibitor(s) and MG/LEMS, confidence of MG/LEMS diagnosis, and the number of patients treated with an ICI prior to MG/LEMS diagnosis. Results Ninety-four papers describing at least one patient treated with ICI(s) prior to the onset of MG and/or LEMS were documented. Overall evidence for a causal link between ICI administration and MG/LEMS was low, with a median IME value of 2.88 (range 2.05-6.61). Conclusions There is a paucity of evidence in support of an etiological relationship between ICIs and MG/LEMS, due largely to the lack of mechanistic studies and/or prospective clinical trials with relevant study endpoints. The current literature is dominated by case reports and retrospective cohort studies, which inherently yield only low-level evidence, supporting the need for further work in this area. A role of ICIs in the etiology of MG/LEMS remains plausible, arguing for continued vigilance for irAEs in patients treated with these drugs. We argue that there is a need for future mechanistic, high quality, large-scale studies specifically investigating the possible etiological role of ICIs in MG/LEMS.
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Affiliation(s)
- Carly Seligman
- Garden & Luo Immune Regulation Laboratory, Department of Clinical Sciences and Advanced Medicine, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - Yu-Mei Chang
- Department of Comparative Biomedical Sciences, Royal Veterinary College, University of London, London, United Kingdom
| | - Jie Luo
- Garden & Luo Immune Regulation Laboratory, Department of Clinical Sciences and Advanced Medicine, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - Oliver A. Garden
- Garden & Luo Immune Regulation Laboratory, Department of Clinical Sciences and Advanced Medicine, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, United States,Dean's Office, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA, United States,*Correspondence: Oliver A. Garden ✉
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Santos-Moreno P, Arias-Aponte J, Rodríguez-Vargas GS, Nieto-Zambrano PD, Villarreal L, Ibatá L, Martinez S, Rubio-Rubio JA, Rodríguez P, Rojas-Villarraga A. Polyautoimmunity in systemic lupus erythematosus patients: New insights from a cross-sectional study. J Transl Autoimmun 2023; 6:100187. [PMID: 36654852 PMCID: PMC9841268 DOI: 10.1016/j.jtauto.2022.100187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 12/29/2022] [Indexed: 01/05/2023] Open
Abstract
Objective To assess the frequency of polyautoimmunity (PolyA) in a cohort of Colombian patients with systemic lupus erythematosus (SLE) and to identify associated factors. Methods This is an analytical cross-sectional study in a specialized center., a comprehensive review of the medical records of SLE patients was performed from 2015 to 2020 in order to obtain demographic, clinical data, laboratory, and treatment information. Associations between PolyA, demographic, and characteristics of the disease were explored. Results A total of 463 patients were included in the analysis. The average age was 47.3 ± 15 years. Most of this population were female (87.4%), whom were diagnosed with SLE in a long-term SLE (10.6 ± 10.1 years). Out of the total patients, 34.7% were diagnosed with PolyA. Among the most frequent clinical criteria for SLICC, arthritis (65%), kidney impairment (39.5%), and alopecia (34.8%) were found. The most frequent SLE-associated PolyA were antiphospholipid syndrome (APS) and Sjögren's syndrome (SS) (16.63% and 10.58%, respectively). PolyA-associated factors were age, xerophthalmia, central nervous system occlusion, and deep vein thrombosis (DVT). In contrast, renal impairment was significantly less frequent in PolyA patients after multivariate analysis. Conclusion The results have showed associated factors with PolyA like age, xerophthalmia, central nervous system occlusion, and deep vein thrombosis in this cohort. On the other hand, lupus nephritis was less frequent in patients with PolyA. This study provides a spotlight of a specific SLE population as real-life evidence for a better characterization of PolyA in the future.
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Affiliation(s)
- Pedro Santos-Moreno
- Scientific Direction, Biomab Center for Rheumatoid Arthritis, Bogotá, D.C., 110221, Colombia,Corresponding author.
| | - Julián Arias-Aponte
- Research Vice-rectory, Fundación Universitaria de Ciencias de La Salud-FUCS, Bogotá D.C, 111411, Colombia
| | | | | | - Laura Villarreal
- Medical Direction, Biomab Center for Rheumatoid Arthritis, Bogotá, D.C., 110221, Colombia
| | - Linda Ibatá
- Epidemiology, Biomab IPS, Bogotá, D.C, 110221, Colombia
| | | | - Jaime-Andrés Rubio-Rubio
- Research Institute, Fundación Universitaria de Ciencias de La Salud FUCS, Bogotá, D.C, 111411, Colombia
| | - Pedro Rodríguez
- Scientific Direction, Biomab Center for Rheumatoid Arthritis, Bogotá, D.C., 110221, Colombia
| | - Adriana Rojas-Villarraga
- Research Institute, Fundación Universitaria de Ciencias de La Salud FUCS, Bogotá, D.C, 111411, Colombia
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Spagni G, Gastaldi M, Businaro P, Chemkhi Z, Carrozza C, Mascagna G, Falso S, Scaranzin S, Franciotta D, Evoli A, Damato V. Comparison of Fixed and Live Cell-Based Assay for the Detection of AChR and MuSK Antibodies in Myasthenia Gravis. NEUROLOGY(R) NEUROIMMUNOLOGY & NEUROINFLAMMATION 2023; 10:10/1/e200038. [PMID: 36270951 PMCID: PMC9621337 DOI: 10.1212/nxi.0000000000200038] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Accepted: 08/18/2022] [Indexed: 11/05/2022]
Abstract
BACKGROUND AND OBJECTIVES Live cell-based assay (CBA) can detect acetylcholine receptors (AChRs) or muscle-specific tyrosine kinase (MuSK) antibodies (Abs) in a proportion of patients with radioimmunoassay (RIA)-double seronegative myasthenia gravis (dSN-MG). A commercial fixed CBA for AChR and MuSK Abs has recently become available; however, comparative studies on fixed and live CBAs are lacking. In this study, we compared the performance of fixed and live CBAs in patients with RIA-dSN MG and assessed their sensitivity in RIA-positive MG samples and their specificity. METHODS AChR and MuSK Abs were tested in 292 serum samples from 2 Italian MG referral centers by live and fixed CBAs: 192 from patients with MG and 100 from controls. All samples had been previously assessed by RIA: 66 were AChR positive, 40 MuSK positive, and 86 dSN. All controls were negative. Two independent raters assessed the CBA results. Fixed and live CBAs were compared with the McNemar test; interrater and interlaboratory agreement were assessed with Cohen's kappa or interclass correlation coefficient (ICC), as appropriate. RESULTS In 86 RIA-dSN samples, fixed CBA detected Abs in 10 cases (11.6%, 95% CI 5.7-20.3), whereas live CBA detected Abs in 16 (18.6%, 95% CI 11.0-28.5) (p = 0.0143). Of these sera, those positive by fixed CBA were also positive by live CBA. In addition, live CBA could detect MuSK Abs in 4 and AChR Abs in 2 samples that were negative by fixed CBA, providing an 8% (95% CI 2.9-16.6) further increase in the Ab detection rate. These results were confirmed by flow cytometry. In the RIA-positive cohort, the sensitivity for AChR Abs was 98.5% (95% CI 91.9%-99.9%) for fixed CBA and 100% (95% CI 94.6-100) for live CBA (p = 0.1573). For both assays, the sensitivity for MuSK Abs was 100% (95% CI 91.2-100), and the specificity was 100% (95% CI 96.4-100). Interrater agreement was almost perfect for live and fixed CBAs (Cohen's kappa 0.972 and 0.978, respectively), alike interlaboratory agreement. Interrater agreement for the CBA score ranged from good to excellent (ICC: 0.832-0.973). DISCUSSION Fixed CBA represents a valuable alternative to RIA for AChR and MuSK Ab detection in patients with MG and could be considered as a first-step diagnostic test. Live CBA can be useful in the serologic evaluation of RIA- and fixed CBA-negative samples.
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Affiliation(s)
- Gregorio Spagni
- From the Department of Neuroscience (G.S., Z.C., S.F., A.E., V.D.), Università Cattolica del Sacro Cuore; Fondazione Policlinico Universitario "A. Gemelli" IRCCS (G.S., A.E.), Rome; Neuroimmunology Laboratory (M.G., P.B., S.S.), IRCCS Mondino Foundation; Department of Brain and Behavioral Sciences (P.B.), University of Pavia, Italy; Chemistry, Biochemistry and Clinical Molecular Biology Unit (C.C., G.M.), Fondazione Policlinico "Gemelli," IRCCS, Rome; Autoimmunology Laboratory (D.F.), IRCCS Ospedale Policlinico San Martino, Genoa; and Department of Neurosciences, Drugs and Child Health (V.D.), University of Florence, Italy
| | - Matteo Gastaldi
- From the Department of Neuroscience (G.S., Z.C., S.F., A.E., V.D.), Università Cattolica del Sacro Cuore; Fondazione Policlinico Universitario "A. Gemelli" IRCCS (G.S., A.E.), Rome; Neuroimmunology Laboratory (M.G., P.B., S.S.), IRCCS Mondino Foundation; Department of Brain and Behavioral Sciences (P.B.), University of Pavia, Italy; Chemistry, Biochemistry and Clinical Molecular Biology Unit (C.C., G.M.), Fondazione Policlinico "Gemelli," IRCCS, Rome; Autoimmunology Laboratory (D.F.), IRCCS Ospedale Policlinico San Martino, Genoa; and Department of Neurosciences, Drugs and Child Health (V.D.), University of Florence, Italy
| | - Pietro Businaro
- From the Department of Neuroscience (G.S., Z.C., S.F., A.E., V.D.), Università Cattolica del Sacro Cuore; Fondazione Policlinico Universitario "A. Gemelli" IRCCS (G.S., A.E.), Rome; Neuroimmunology Laboratory (M.G., P.B., S.S.), IRCCS Mondino Foundation; Department of Brain and Behavioral Sciences (P.B.), University of Pavia, Italy; Chemistry, Biochemistry and Clinical Molecular Biology Unit (C.C., G.M.), Fondazione Policlinico "Gemelli," IRCCS, Rome; Autoimmunology Laboratory (D.F.), IRCCS Ospedale Policlinico San Martino, Genoa; and Department of Neurosciences, Drugs and Child Health (V.D.), University of Florence, Italy
| | - Zeineb Chemkhi
- From the Department of Neuroscience (G.S., Z.C., S.F., A.E., V.D.), Università Cattolica del Sacro Cuore; Fondazione Policlinico Universitario "A. Gemelli" IRCCS (G.S., A.E.), Rome; Neuroimmunology Laboratory (M.G., P.B., S.S.), IRCCS Mondino Foundation; Department of Brain and Behavioral Sciences (P.B.), University of Pavia, Italy; Chemistry, Biochemistry and Clinical Molecular Biology Unit (C.C., G.M.), Fondazione Policlinico "Gemelli," IRCCS, Rome; Autoimmunology Laboratory (D.F.), IRCCS Ospedale Policlinico San Martino, Genoa; and Department of Neurosciences, Drugs and Child Health (V.D.), University of Florence, Italy
| | - Cinzia Carrozza
- From the Department of Neuroscience (G.S., Z.C., S.F., A.E., V.D.), Università Cattolica del Sacro Cuore; Fondazione Policlinico Universitario "A. Gemelli" IRCCS (G.S., A.E.), Rome; Neuroimmunology Laboratory (M.G., P.B., S.S.), IRCCS Mondino Foundation; Department of Brain and Behavioral Sciences (P.B.), University of Pavia, Italy; Chemistry, Biochemistry and Clinical Molecular Biology Unit (C.C., G.M.), Fondazione Policlinico "Gemelli," IRCCS, Rome; Autoimmunology Laboratory (D.F.), IRCCS Ospedale Policlinico San Martino, Genoa; and Department of Neurosciences, Drugs and Child Health (V.D.), University of Florence, Italy
| | - Giovanni Mascagna
- From the Department of Neuroscience (G.S., Z.C., S.F., A.E., V.D.), Università Cattolica del Sacro Cuore; Fondazione Policlinico Universitario "A. Gemelli" IRCCS (G.S., A.E.), Rome; Neuroimmunology Laboratory (M.G., P.B., S.S.), IRCCS Mondino Foundation; Department of Brain and Behavioral Sciences (P.B.), University of Pavia, Italy; Chemistry, Biochemistry and Clinical Molecular Biology Unit (C.C., G.M.), Fondazione Policlinico "Gemelli," IRCCS, Rome; Autoimmunology Laboratory (D.F.), IRCCS Ospedale Policlinico San Martino, Genoa; and Department of Neurosciences, Drugs and Child Health (V.D.), University of Florence, Italy
| | - Silvia Falso
- From the Department of Neuroscience (G.S., Z.C., S.F., A.E., V.D.), Università Cattolica del Sacro Cuore; Fondazione Policlinico Universitario "A. Gemelli" IRCCS (G.S., A.E.), Rome; Neuroimmunology Laboratory (M.G., P.B., S.S.), IRCCS Mondino Foundation; Department of Brain and Behavioral Sciences (P.B.), University of Pavia, Italy; Chemistry, Biochemistry and Clinical Molecular Biology Unit (C.C., G.M.), Fondazione Policlinico "Gemelli," IRCCS, Rome; Autoimmunology Laboratory (D.F.), IRCCS Ospedale Policlinico San Martino, Genoa; and Department of Neurosciences, Drugs and Child Health (V.D.), University of Florence, Italy
| | - Silvia Scaranzin
- From the Department of Neuroscience (G.S., Z.C., S.F., A.E., V.D.), Università Cattolica del Sacro Cuore; Fondazione Policlinico Universitario "A. Gemelli" IRCCS (G.S., A.E.), Rome; Neuroimmunology Laboratory (M.G., P.B., S.S.), IRCCS Mondino Foundation; Department of Brain and Behavioral Sciences (P.B.), University of Pavia, Italy; Chemistry, Biochemistry and Clinical Molecular Biology Unit (C.C., G.M.), Fondazione Policlinico "Gemelli," IRCCS, Rome; Autoimmunology Laboratory (D.F.), IRCCS Ospedale Policlinico San Martino, Genoa; and Department of Neurosciences, Drugs and Child Health (V.D.), University of Florence, Italy
| | - Diego Franciotta
- From the Department of Neuroscience (G.S., Z.C., S.F., A.E., V.D.), Università Cattolica del Sacro Cuore; Fondazione Policlinico Universitario "A. Gemelli" IRCCS (G.S., A.E.), Rome; Neuroimmunology Laboratory (M.G., P.B., S.S.), IRCCS Mondino Foundation; Department of Brain and Behavioral Sciences (P.B.), University of Pavia, Italy; Chemistry, Biochemistry and Clinical Molecular Biology Unit (C.C., G.M.), Fondazione Policlinico "Gemelli," IRCCS, Rome; Autoimmunology Laboratory (D.F.), IRCCS Ospedale Policlinico San Martino, Genoa; and Department of Neurosciences, Drugs and Child Health (V.D.), University of Florence, Italy
| | - Amelia Evoli
- From the Department of Neuroscience (G.S., Z.C., S.F., A.E., V.D.), Università Cattolica del Sacro Cuore; Fondazione Policlinico Universitario "A. Gemelli" IRCCS (G.S., A.E.), Rome; Neuroimmunology Laboratory (M.G., P.B., S.S.), IRCCS Mondino Foundation; Department of Brain and Behavioral Sciences (P.B.), University of Pavia, Italy; Chemistry, Biochemistry and Clinical Molecular Biology Unit (C.C., G.M.), Fondazione Policlinico "Gemelli," IRCCS, Rome; Autoimmunology Laboratory (D.F.), IRCCS Ospedale Policlinico San Martino, Genoa; and Department of Neurosciences, Drugs and Child Health (V.D.), University of Florence, Italy.
| | - Valentina Damato
- From the Department of Neuroscience (G.S., Z.C., S.F., A.E., V.D.), Università Cattolica del Sacro Cuore; Fondazione Policlinico Universitario "A. Gemelli" IRCCS (G.S., A.E.), Rome; Neuroimmunology Laboratory (M.G., P.B., S.S.), IRCCS Mondino Foundation; Department of Brain and Behavioral Sciences (P.B.), University of Pavia, Italy; Chemistry, Biochemistry and Clinical Molecular Biology Unit (C.C., G.M.), Fondazione Policlinico "Gemelli," IRCCS, Rome; Autoimmunology Laboratory (D.F.), IRCCS Ospedale Policlinico San Martino, Genoa; and Department of Neurosciences, Drugs and Child Health (V.D.), University of Florence, Italy
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COVID-19 infection and vaccination against SARS-CoV-2 in myasthenia gravis. Acta Neurol Belg 2022; 123:529-536. [PMID: 36279094 PMCID: PMC9589734 DOI: 10.1007/s13760-022-02121-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Accepted: 10/13/2022] [Indexed: 11/01/2022]
Abstract
INTRODUCTION Myasthenia gravis (MG) is an autoimmune disease of the neuromuscular junction which is typically presented with muscle weakness and excessive fatigability. Majority of MG patients require long-term immune suppression. Our aim was to analyze the frequency and severity of COVID-19 infection in MG patients, as well as the frequency of vaccinated MG patients against SARS-CoV-2. METHODS We included 125 MG patients from the central Belgrade municipalities-60% females, age at MG onset 50.1 ± 19.7 years, age at testing 61.7 ± 16.8 years, anti-acetylcholine receptor (anti-AChR) positive 78% and muscle specific tyrosine kinase (MuSK) positive 8.6%. RESULTS One-third of our MG patients had a COVID-19 infection and they were younger compared to those without verified COVID-19. Severe COVID-19 infection was registered in 28% of MG patients, mostly in elder subjects with comorbidities such as cardiac diseases and malignancies. MG worsening was noted in 21% of patients during/after COVID-19 and 42% had COVID-19 sequelae. Majority of MG patients were vaccinated against SARS-CoV-2 (almost 70%). Vaccination was more common among MG patients with diabetes and in those with a milder form of MG. The most common types of vaccines were Sinopharm (42%) and Pfizer-BioNTech (25.6%). Adverse events were observed in 36% of vaccinated patients, with flu-like symptoms (77%) and local reactions (13%) being the most common ones. MG worsening was noticed in 5 (5.8%) patients after vaccination. CONCLUSION COVID-19 has placed a significant new burden for MG patients. Elder MG patients and patients with comorbidities are in higher risk of having adverse outcome following SARS-CoV-2 infection. Percentage of vaccinated MG patients was higher than in general Serbian population.
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Thapa L, Thapa M, Bhattarai S, Shrestha AM, Sharma N, Rai N, Pokharel M, Paudel R. D-penicillamine Induced Myasthenia Gravis in Wilson's Disease: A Case Report. JNMA J Nepal Med Assoc 2022; 60:644-647. [PMID: 36705187 PMCID: PMC9297353 DOI: 10.31729/jnma.7607] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Accepted: 06/25/2022] [Indexed: 01/31/2023] Open
Abstract
Myasthenia gravis is a neuromuscular junction disorder characterised by fluctuating muscle weakness, improved by using anti-cholinesterase drugs. In addition to the autoimmune aetiology, various factors such as infections, surgery, and drugs are known to precipitate the condition. We report a case of a 15-year-old boy with D-penicillamine-induced myasthenia gravis who presented with facial diplegia, dysphagia, and drooling of saliva, 6 years after the initiation of treatment for Wilson's disease. Therefore, clinicians should be more vigilant while prescribing patients with chelating drugs like D-penicillamine with regular monitoring of the new symptoms and keeping a very low threshold for the suspicion of myasthenia gravis. Keywords d-penicillamine; myasthenia gravis; pyridostigmine; Wilson's disease.
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Affiliation(s)
- Lekhjung Thapa
- Department of Neurology, National Neuro Center, Maharajgunj, Chakrapath, Kathmandu, Nepal,Correspondence: Dr Lekhjung Thapa, Department of Neurology, National Neuro Centre, Maharajgunj, Kathmandu, Nepal. , Phone: +977-9749370390
| | - Monika Thapa
- Department of Neurology, National Neuro Center, Maharajgunj, Chakrapath, Kathmandu, Nepal
| | - Suman Bhattarai
- Department of Neurology, National Neuro Center, Maharajgunj, Chakrapath, Kathmandu, Nepal
| | - Abhishek Man Shrestha
- Department of Neurology, National Neuro Center, Maharajgunj, Chakrapath, Kathmandu, Nepal
| | - Nooma Sharma
- Department of Neurology, National Neuro Center, Maharajgunj, Chakrapath, Kathmandu, Nepal
| | - Nilshan Rai
- KIST Medical College and Teaching Hospital, Imadol, Lalitpur, Nepal
| | - Merina Pokharel
- Department of Neurology, National Neuro Center, Maharajgunj, Chakrapath, Kathmandu, Nepal
| | - Raju Paudel
- Department of Neurology, National Neuro Center, Maharajgunj, Chakrapath, Kathmandu, Nepal
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AlManea SM, AlHadlaq MA, AlBuqmi NM, AlGomaiz SS. The Dental Management of Pediatric Patient Diagnosed with Myasthenia Gravis: A Case Report. Eur J Dent 2022; 16:710-714. [PMID: 35728606 PMCID: PMC9507565 DOI: 10.1055/s-0042-1745773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Myasthenia gravis (MG) is a rare autoimmune neurological disorder characterized by muscle weakness and can vary in severity from the mild form that affects the ocular muscles only to the generalized form that affects the other muscle groups. The prevalence of MG is 150 to 200 per million population over the past 50 years, and approximately 10% of these cases are pediatric patients where the disease onset starts before the age of 18 years. The etiology of MG is due to the blockage of neuromuscular transmission by circulating autoantibodies targeting mainly the nicotinic acetylcholine receptor (AChR) and associated proteins in the postsynaptic membrane of skeletal muscles. In MG patients, dental treatment is challenging due to the nature of the condition and its complexity. Moreover, dentists treating MG patients should acquire knowledge about the disease background and the special considerations that need to be taken. In this case report, our aim was to raise awareness about MG among dentists and discuss the dental management of the patients who have this disease and the precautions that should be taken. This case report presents a pediatric MG patient with poor oral hygiene, multiple decayed teeth, dental fluorosis, tongue thrust oral habit that led to anterior open-bite and uncomplicated crown fracture of the upper permanent central incisors. The decision was made to treat the patient under general anesthesia because of the medical condition and the extent of the dental treatment. In the process of preparing the patient for surgery, the patient was cleared from the treating physicians and was admitted under neurology care as per the primary physician. On the day of surgery, the patient received full-mouth dental rehabilitation under general anesthesia, including pulp therapy, crowns, restorations, and extractions. Furthermore, she was seen regularly in recall visits every 3 months.
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Affiliation(s)
- Saad M AlManea
- Department of Pediatric Dentistry, Ministry of National Guard - Health Affairs, Riyadh, Saudi Arabia
| | - Mashael A AlHadlaq
- Department of Pediatric Dentistry, Ministry of National Guard - Health Affairs, Riyadh, Saudi Arabia
| | - Noura M AlBuqmi
- Department of Pediatric Dentistry, Ministry of National Guard - Health Affairs, Riyadh, Saudi Arabia
| | - Sultan S AlGomaiz
- Department of Dental Services, Ministry of National Guard - Health Affairs, Riyadh, Saudi Arabia
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Preferential X Chromosome Inactivation as a Mechanism to Explain Female Preponderance in Myasthenia Gravis. Genes (Basel) 2022; 13:genes13040696. [PMID: 35456502 PMCID: PMC9031138 DOI: 10.3390/genes13040696] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 04/04/2022] [Accepted: 04/13/2022] [Indexed: 11/17/2022] Open
Abstract
Myasthenia gravis (MG) is a neuromuscular autoimmune disease characterized by prevalence in young women (3:1). Several mechanisms proposed as explanations for gender bias, including skewed X chromosome inactivation (XCI) and dosage or sex hormones, are often involved in the development of autoimmunity. The skewed XCI pattern can lead to an unbalanced expression of some X-linked genes, as observed in several autoimmune disorders characterized by female predominance. No data are yet available regarding XCI and MG. We hypothesize that the preferential XCI pattern may contribute to the female bias observed in the onset of MG, especially among younger women. XCI analysis was performed on blood samples of 284 women between the ages of 20 and 82. XCI was tested using the Human Androgen Receptor Assay (HUMARA). XCI patterns were classified as random (XCI < 75%) and preferential (XCI ≥ 75%). In 121 informative patients, the frequency of skewed XCI patterns was 47%, significantly higher than in healthy controls (17%; p ≤ 0.00001). Interestingly, the phenomenon was observed mainly in younger patients (<45 years; p ≤ 0.00001). Furthermore, considering the XCI pattern and the other clinical characteristics of patients, no significant differences were found. In conclusion, we observed preferential XCI in MG female patients, suggesting its potential role in the aetiology of MG, as observed in other autoimmune diseases in women.
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Umair M, Faheem F, Malik HA, Hassan SAA, Iqbal A. Bilateral Facial Palsy Without Ocular Muscle Involvement in Myasthenia Gravis: Case Report. Cureus 2022; 14:e23210. [PMID: 35444878 PMCID: PMC9012012 DOI: 10.7759/cureus.23210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/15/2022] [Indexed: 11/23/2022] Open
Abstract
Myasthenia gravis (MG) is an autoimmune neuromuscular junction disorder that is more common among women than men. It has two major subtypes, namely, ocular and generalized MG, and while facial weakness is common in generalized MG, facial weakness without the involvement of ocular muscle is exceedingly rare. Here, we describe the case of a middle-aged man who presented with bilateral facial palsy but without diplopia or proximal muscle weakness. The patient tested positive for acetylcholine receptor antibodies and exhibited amplitude decrement on repetitive nerve stimulation, which are diagnostic for MG. This report emphasizes the importance of neurodiagnostic and physiological testing in patients presenting with bilateral facial weakness alone.
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Abstract
Myasthenia gravis is a rare autoimmune disease characterised by autoantibodies preventing normal function of acetylcholine receptors at the post-synaptic membrane of the neuromuscular junction. This causes weakness of skeletal muscles that can be variable and fatigable, and often manifests as ptosis and/or diplopia, with 60% of patients demonstrating ocular features at onset, and thus may present initially to eye care practitioners. Approximately 15% of patients have ocular myasthenia gravis, where symptoms remain restricted to this distribution. The majority of patients have blocking antibodies against the acetylcholine receptor, but antibodies directed against other related targets account for a smaller proportion and are associated with specific phenotypes. Associations with both thymoma and with other autoimmune phenomena (particularly thyroid disease) can occur. Clinical examination can identify characteristic findings including fatigable ptosis and Cogan's lid twitch sign. Investigations to confirm the diagnosis include simple office-based procedures such as the ice test, and testing for serum autoantibodies, as well as electrophysiological testing such as repetitive nerve stimulation and single-fibre electromyography. The management of ocular myasthenia gravis is discussed, including non-pharmacological options, pyridostigmine, corticosteroids, other immunosuppressive agents, and thymectomy. The goals of management are to alleviate symptoms, and where possible prevent chronic disability or progression to generalised myasthenia gravis.
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Affiliation(s)
- Neil H Shuey
- Neuro-ophthalmology Clinic, Royal Victorian Eye and Ear Hospital, East Melbourne, Australia.,Clinical Neurosciences, St Vincent's Hospital Melbourne, Fitzroy, Australia
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Chang CC, Yeh JH, Chiu HC, Chen YM, Jhou MJ, Liu TC, Lu CJ. Utilization of Decision Tree Algorithms for Supporting the Prediction of Intensive Care Unit Admission of Myasthenia Gravis: A Machine Learning-Based Approach. J Pers Med 2022; 12:32. [PMID: 35055347 PMCID: PMC8778268 DOI: 10.3390/jpm12010032] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 12/24/2021] [Accepted: 12/28/2021] [Indexed: 12/23/2022] Open
Abstract
Myasthenia gravis (MG), an acquired autoimmune-related neuromuscular disorder that causes muscle weakness, presents with varying severity, including myasthenic crisis (MC). Although MC can cause significant morbidity and mortality, specialized neuro-intensive care can produce a good long-term prognosis. Considering the outcomes of MG during hospitalization, it is critical to conduct risk assessments to predict the need for intensive care. Evidence and valid tools for the screening of critical patients with MG are lacking. We used three machine learning-based decision tree algorithms, including a classification and regression tree, C4.5, and C5.0, for predicting intensive care unit (ICU) admission of patients with MG. We included 228 MG patients admitted between 2015 and 2018. Among them, 88.2% were anti-acetylcholine receptors antibody positive and 4.7% were anti-muscle-specific kinase antibody positive. Twenty clinical variables were used as predictive variables. The C5.0 decision tree outperformed the other two decision tree and logistic regression models. The decision rules constructed by the best C5.0 model showed that the Myasthenia Gravis Foundation of America clinical classification at admission, thymoma history, azathioprine treatment history, disease duration, sex, and onset age were significant risk factors for the development of decision rules for ICU admission prediction. The developed machine learning-based decision tree can be a supportive tool for alerting clinicians regarding patients with MG who require intensive care, thereby improving the quality of care.
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Affiliation(s)
- Che-Cheng Chang
- Department of Neurology, Fu Jen Catholic University Hospital, Fu Jen Catholic University, New Taipei City 24352, Taiwan; (C.-C.C.); (Y.-M.C.)
- Ph.D. Program in Nutrition and Food Sciences, Human Ecology College, Fu Jen Catholic University, New Taipei City 242062, Taiwan
| | - Jiann-Horng Yeh
- School of Medicine, Fu Jen Catholic University, New Taipei City 24205, Taiwan; (J.-H.Y.); (H.-C.C.)
- Department of Neurology, Shin Kong Wu Ho-Su Memorial Hospital, Taipei 11101, Taiwan
- Department of Neurology, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Hou-Chang Chiu
- School of Medicine, Fu Jen Catholic University, New Taipei City 24205, Taiwan; (J.-H.Y.); (H.-C.C.)
- Department of Neurology, Shuang-Ho Hospital, Taipei Medical University, New Taipei City 23561, Taiwan
| | - Yen-Ming Chen
- Department of Neurology, Fu Jen Catholic University Hospital, Fu Jen Catholic University, New Taipei City 24352, Taiwan; (C.-C.C.); (Y.-M.C.)
| | - Mao-Jhen Jhou
- Graduate Institute of Business Administration, Fu Jen Catholic University, New Taipei City 242062, Taiwan;
| | - Tzu-Chi Liu
- Department of Business Administration, Fu Jen Catholic University, New Taipei City, 242062, Taiwan;
| | - Chi-Jie Lu
- Graduate Institute of Business Administration, Fu Jen Catholic University, New Taipei City 242062, Taiwan;
- Artificial Intelligence Development Center, Fu Jen Catholic University, New Taipei City 242062, Taiwan
- Department of Information Management, Fu Jen Catholic University, New Taipei City 242062, Taiwan
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