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1.
BMC Neurol ; 24(1): 139, 2024 Apr 25.
Artigo em Inglês | MEDLINE | ID: mdl-38664714

RESUMO

BACKGROUND: Non-motor symptoms in myasthenia gravis (MG) are rarely confirmed. Although there are some small cohort studies, a large-systemic survey has not yet been performed. METHODS: We investigated the incidence and clinical characteristics of patients with MG who had taste disorders and alopecia using data of 1710 patients with MG enrolled in the Japan MG Registry 2021. RESULTS: Among them, 104 (6.1%) out of 1692 patients and 138 (8.2%) out of 1688 patients had histories of taste disorders and alopecia, respectively. Among the patients with MG, taste disorders were significantly more common in women, those with severe symptoms, refractory MG, or thymoma-associated MG, and were less common in those with ocular MG. The taste disorders often occurred after the onset of MG and often responded to MG treatments. Alopecia was more common in MG patients with a history of bulbar palsy and thymoma, and it often occurred before the onset of MG and sometimes responded to MG treatments. Multivariate logistic regression analysis revealed taste disturbance was associated with worst quantitative MG score and thymoma-associated MG; and alopecia was associated with thymoma-associated MG. CONCLUSION: Clinicians should be aware of the non-motor symptoms in MG, especially in patients with severe myasthenic symptoms and thymoma-associated MG.


Assuntos
Alopecia , Miastenia Gravis , Distúrbios do Paladar , Humanos , Miastenia Gravis/epidemiologia , Miastenia Gravis/complicações , Miastenia Gravis/diagnóstico , Alopecia/epidemiologia , Alopecia/diagnóstico , Feminino , Masculino , Distúrbios do Paladar/epidemiologia , Distúrbios do Paladar/etiologia , Pessoa de Meia-Idade , Adulto , Idoso , Japão/epidemiologia , Sistema de Registros , Timoma/complicações , Timoma/epidemiologia , Incidência
2.
J Neurol Sci ; 460: 123017, 2024 May 15.
Artigo em Inglês | MEDLINE | ID: mdl-38640581

RESUMO

BACKGROUND: Myasthenia gravis (MG) is an immune disorder that causes muscle weakness with an increasing prevalence, particularly among the elderly in Japan. Glucocorticoid treatment for MG is problematic for bone health because of reduced bone density and increased fracture risk. The fracture risk assessment tool (FRAX®) can estimate fracture risk, but its applicability in patients with MG remains uncertain. METHODS: A prospective cohort study was conducted on 54 patients with MG between April and July 2012. Bone mineral density (BMD) was measured, and FRAX® scores were calculated with and without BMD. We also adjusted FRAX® scores based on glucocorticoid dosage. Patients were monitored for major osteoporotic fractures (MOF) until June 2022. Statistical analyses included Kaplan-Meier curves and Cox proportional hazards models. RESULTS: The study group included 12 men and 42 women with a mean age of 62 years. Higher FRAX® scores correlated with increased fracture risk, particularly in the hip and lumbar regions. The 10-year fracture-free rate was significantly lower in the high-FRAX® score group. The FRAX® score using BMD is a significant predictor of MOF risk. The hazard ratio for FRAX® scores was 1.17 (95% CI 1.10-1.26). CONCLUSION: We demonstrated the effectiveness of the FRAX® tool in assessing fracture risk among patients with MG. High FRAX® scores correlated with increased fracture risk, emphasizing its importance. These findings support the incorporation of FRAX® assessment into clinical management to enhance patient care and outcomes. However, the small sample size and observational nature suggest a need for further research.


Assuntos
Densidade Óssea , Miastenia Gravis , Fraturas por Osteoporose , Humanos , Masculino , Feminino , Miastenia Gravis/epidemiologia , Miastenia Gravis/diagnóstico , Miastenia Gravis/complicações , Idoso , Pessoa de Meia-Idade , Medição de Risco/métodos , Japão/epidemiologia , Fraturas por Osteoporose/epidemiologia , Fraturas por Osteoporose/etiologia , Estudos Prospectivos , Estudos de Coortes , Glucocorticoides/uso terapêutico , Glucocorticoides/efeitos adversos , Idoso de 80 Anos ou mais , Adulto , População do Leste Asiático
3.
Ann Clin Transl Neurol ; 11(5): 1338-1346, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-38572524

RESUMO

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.


Assuntos
Anticorpos Monoclonais Humanizados , Inativadores do Complemento , Miastenia Gravis , Humanos , Miastenia Gravis/tratamento farmacológico , Anticorpos Monoclonais Humanizados/administração & dosagem , Anticorpos Monoclonais Humanizados/farmacologia , Anticorpos Monoclonais Humanizados/efeitos adversos , Anticorpos Monoclonais Humanizados/uso terapêutico , Feminino , Masculino , Pessoa de Meia-Idade , Idoso , Adulto , Inativadores do Complemento/administração & dosagem , Inativadores do Complemento/farmacologia , Substituição de Medicamentos , Sistema de Registros , Japão
4.
Intern Med ; 63(2): 319-322, 2024 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-37225479

RESUMO

Encephalitis caused by antibodies targeting the leucine-rich glioma-inactivated 1 protein receptor, which belongs to the anti-voltage-gated potassium channel receptor complex, is characterized by hyponatremia, progressive cognitive impairment, seizures, and psychiatric disorders. The patient initially presented with faciobrachial dystonic seizures and subsequently developed encephalopathy. Brain magnetic resonance imaging revealed atypical unilateral hyperintense signals in the cerebral cortex and white matter. Intravenous corticosteroid pulse therapy effectively improved faciobrachial dystonic seizures and brain lesions.


Assuntos
Encefalite , Glioma , Encefalite Límbica , Substância Branca , Humanos , Leucina , Substância Branca/diagnóstico por imagem , Peptídeos e Proteínas de Sinalização Intracelular , Encefalite Límbica/complicações , Anticorpos , Encefalite/complicações , Encefalite/diagnóstico por imagem , Encefalite/tratamento farmacológico , Convulsões/etiologia , Córtex Cerebral/diagnóstico por imagem , Glioma/complicações , Autoanticorpos
5.
Ther Apher Dial ; 28(1): 131-140, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-37731293

RESUMO

OBJECTIVES: The aim of the study was to investigate the serological factors in predicting symptom improvement in myasthenia gravis (MG) patients who underwent plasmapheresis (PP). METHODS: The relationship between symptom improvement and change in immunoglobin G (IgG) and acetylcholine receptor antibody (AchR-Ab) levels in 21 MG patients after PP was analyzed. RESULTS: Patients were divided into two groups: the favorable (n = 11) or unfavorable (n = 10) response groups around the median MG composite improvement rate (50 [29, 56]%) 2 weeks after a PP course. In all patients, the IgG reduction rate before and after PP was higher in the favorable than the unfavorable response group. In AChR-Ab-positive patients, IgG and AChR-Ab reduction rates were higher in the favorable than the unfavorable response group. CONCLUSION: IgG reduction rate is a predictor of symptom improvement in MG patients who underwent PP.


Assuntos
Miastenia Gravis , Humanos , Receptores Colinérgicos , Plasmaferese , Autoanticorpos , Imunoglobulina G
6.
J Neuroimmunol ; 385: 578241, 2023 12 15.
Artigo em Inglês | MEDLINE | ID: mdl-37952282

RESUMO

This study included 51 patients with muscle-specific kinase antibody-positive myasthenia gravis (MuSK-MG) from a Japanese multicenter survey to examine clinical features and outcomes. Median onset age was 37 years and female predominance was observed. All patients developed generalized symptoms and almost all (50/51) patients had bulbar symptoms. About half of the patients met the criteria for refractory MG. The refractory group had a lower age of onset, higher severity scores, and higher maximum daily doses of oral prednisolone compared to the nonrefractory group. The outcomes for MuSK-MG patients in Japan are not favorable, indicating the need for more aggressive treatment.


Assuntos
Miastenia Gravis , Humanos , Feminino , Adulto , Masculino , Japão , Miastenia Gravis/tratamento farmacológico , Miastenia Gravis/diagnóstico , Prednisolona/uso terapêutico , Músculos , Autoanticorpos/uso terapêutico
7.
J Neuroinflammation ; 20(1): 35, 2023 Feb 14.
Artigo em Inglês | MEDLINE | ID: mdl-36788526

RESUMO

BACKGROUND: Guillain-Barré syndrome (GBS) and chronic inflammatory demyelinating polyneuropathy (CIDP) are human autoimmune peripheral neuropathy. Besides humoral immunity, cellular immunity is also believed to contribute to these pathologies, especially CIDP. Sphingosine-1-phosphate receptor 1 (S1PR1) regulates the maturation, migration, and trafficking of lymphocytes. As of date, the therapeutic effect of sphingosine-1-phosphate receptor (S1PR) agonists on patients with GBS or CIDP remains unclear. METHODS: To evaluate the effect of siponimod, an agonist of S1PR1 and S1PR5, on experimental autoimmune neuritis (EAN), an animal model of autoimmune peripheral neuropathy, was used. Lewis rats were immunized with 125 µg of synthetic peptide from bovine P2 protein. Rats in the siponimod group were orally administered 1.0 mg/kg siponimod and those in the EAN group were administrated the vehicle on days 5-27 post-immunization (p.i.) daily. The symptom severity was recorded daily. The changes in the expression of cytokines and transcription factors in the lymph nodes and cauda equina (CE) which correlate with the pathogenesis of EAN and recovery of injured nerve were measured using reverse transcription quantitative PCR. Histological study of CE was also performed. RESULTS: Flaccid paralysis developed on day 11 p.i. in both groups. Siponimod relieved the symptom severity and decreased the expression of interferon-gamma and IL-10 mRNAs in lymph nodes and CE compared with that in the EAN group. The expression of Jun proto-oncogene (c-Jun) mRNA increased from the peak to the recovery phase and that of Sonic hedgehog signaling molecule (Shh) and Glial cell line-derived neurotrophic factor (Gdnf) increased prior to increase in c-Jun with no difference observed between the two groups. Histologically, siponimod also reduced demyelinating lesions and inflammatory cell invasion in CE. CONCLUSIONS: Siponimod has a potential to ameliorate EAN. Shh and Gdnf, as well as C-Jun played a significant role during the recovery of injured nerves.


Assuntos
Síndrome de Guillain-Barré , Neurite Autoimune Experimental , Polirradiculoneuropatia Desmielinizante Inflamatória Crônica , Humanos , Ratos , Animais , Bovinos , Fator Neurotrófico Derivado de Linhagem de Célula Glial/metabolismo , Nervo Isquiático/patologia , Proteínas Hedgehog/metabolismo , Ratos Endogâmicos Lew , Síndrome de Guillain-Barré/tratamento farmacológico
8.
Neurotherapeutics ; 20(2): 518-523, 2023 03.
Artigo em Inglês | MEDLINE | ID: mdl-36607596

RESUMO

The efficacy of intravenous high-dose methylprednisolone (IVMP) in ocular myasthenia gravis (MG) has not been fully established. This study aimed to elucidate the effects of early intervention with IVMP for achieving the therapeutic targets (minimal manifestations [MM] or MM or better status with prednisolone ≤ 5 mg/day [MM5mg]) in ocular MG. In this observational study, we included a total of 1710 consecutive patients with MG enrolled in the Japan MG Registry in 2021. Of these, 204 patients with ocular MG who received immunotherapy were analyzed. The clinical course and time to first achieve MM or MM5mg after starting immunotherapy were compared between the early IVMP group (treated with IVMP within 3 months of treatment initiation) and the non-early IVMP group. Despite having greater clinical severity before immunotherapy and lower oral prednisolone doses throughout the course, the early IVMP group (n = 55) showed a higher rate of achievement of MM (P = 0.0040, log-rank test; hazard ratio 1.58, 95% confidence interval [CI] 1.13-2.20, P < 0.0001) and MM5mg (P = 0.0005, log-rank test; hazard ratio 1.78, 95% CI 1.27-2.51, P < 0.0001) compared with the non-early IVMP group (n = 149). In conclusion, an early intervention with IVMP is likely to increase the probability of achieving a better long-term outcome and reducing the total dose of corticosteroids in ocular MG.


Assuntos
Metilprednisolona , Miastenia Gravis , Humanos , Metilprednisolona/uso terapêutico , Resultado do Tratamento , Administração Intravenosa , Miastenia Gravis/tratamento farmacológico , Imunoterapia
9.
J Neurol Neurosurg Psychiatry ; 94(6): 467-473, 2023 06.
Artigo em Inglês | MEDLINE | ID: mdl-36693723

RESUMO

BACKGROUND: Early fast-acting treatment (EFT) is the aggressive use of fast-acting therapies such as plasmapheresis, intravenous immunoglobulin and/or intravenous high-dose methylprednisolone (IVMP) from the early phases of treatment. EFT is reportedly beneficial for early achievement of minimal manifestations (MM) or better status with ≤5 mg/day prednisolone (MM5mg), a practical therapeutic target for myasthenia gravis (MG). OBJECTIVE: The current study aimed to clarify which specific EFT regimen is efficacious and the patient characteristics that confer sensitivity to EFT. METHODS: We recruited a total of 1710 consecutive patients with MG who enrolled in the Japan MG Registry for this large-cohort study. Among them, 1066 with generalised MG who had received immunotherapy were analysed. Prognostic background factors were matched in a 1:1 ratio using propensity score matching analysis between patients treated with EFT (n=350) and those treated without EFT (n=350). The clinical course and time to first achieve MM5mg after starting immunotherapy was analysed in relation to treatment combinations and patient characteristics. RESULTS: Kaplan-Meier analyses showed that EFT had a significant effect on the achievement of MM5mg (p<0.0001, log-rank test; HR 1.82, p<0.0001). Notably, EFT was efficacious for any type of MG, and the inclusion of IVMP resulted in earlier and more frequent achievement of MM5mg (p=0.0352, log-rank test; HR 1.46, p=0.0380). In addition, early administration of calcineurin inhibitors also promoted MM5mg achievement. CONCLUSION: Early cycles of intervention with EFT and early use of calcineurin inhibitors provides long-term benefits in terms of achieving therapeutic targets for generalised MG, regardless of clinical subtype.


Assuntos
Inibidores de Calcineurina , Miastenia Gravis , Humanos , Inibidores de Calcineurina/uso terapêutico , Estudos de Coortes , Miastenia Gravis/tratamento farmacológico , Metilprednisolona/uso terapêutico , Imunoterapia
10.
Case Rep Neurol ; 14(2): 314-319, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36160656

RESUMO

A 55-year-old woman with a history of allergic sinusitis was being administered cyclosporine for ptosis and diplopia due to myasthenia gravis since age 46 years. She developed painful dysesthesia that began in her feet and later spread to her palms, leading to difficulty in walking. Eosinophils were markedly increased in the peripheral blood. Nerve conduction studies revealed mononeuritis multiplex. Nerve biopsy showed the infiltration of eosinophils in the superior neurovasculature. Based on these findings, eosinophilic granulomatous polyangiitis was diagnosed. Methylprednisolone pulse therapy was followed by oral prednisolone. Two weeks after treatment, the patient could do normal daily activities without assistance. In patients with myasthenia gravis having a history of allergic diseases, considering EGPA as a complication and monitoring prior changes in blood data are necessary for early detection before apparent tissue damage.

11.
Acute Med Surg ; 7(1): e577, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33343907

RESUMO

BACKGROUND: The prognosis of out-of-hospital cardiac arrest remains poor, especially for cardiopulmonary arrest patients in rural areas with longer transport duration to hospitals. CASE PRESENTATION: In June 2016, we began providing prehospital extracorporeal life support using a mobile operating room for emergency surgery. We report two patients who survived after receiving prehospital extracorporeal cardiopulmonary resuscitation and were discharged. A patient with cardiopulmonary arrest from accidental hypothermia due to drowning survived with good neurological outcomes after on-site extracorporeal cardiopulmonary resuscitation immediately after rescue. The other patient who survived experienced cardiopulmonary arrest at his workplace, which was approximately 90 min from the center. Prehospital extracorporeal cardiopulmonary resuscitation shortened the cardiopulmonary arrest time by an estimated 30 min, and the patient survived until the hospital. CONCLUSION: Prehospital extracorporeal cardiopulmonary resuscitation has the potential to save lives in rural areas by reducing low-flow time.

12.
J Immunol ; 204(3): 531-539, 2020 02 01.
Artigo em Inglês | MEDLINE | ID: mdl-31852750

RESUMO

Multiple sclerosis and experimental autoimmune encephalomyelitis (EAE) are inflammatory diseases of the CNS in which Th17 cells play a major role in the disease pathogenesis. Th17 cells that secrete GM-CSF are pathogenic and drive inflammation of the CNS. IL-9 is a cytokine with pleiotropic functions, and it has been suggested that it controls the pathogenic inflammation mediated by Th17 cells, and IL-9R-/- mice develop more severe EAE compared with wild-type counterparts. However, the underlying mechanism by which IL-9 suppresses EAE has not been clearly defined. In this study, we investigated how IL-9 modulates EAE development. By using mice knockout for IL-9R, we show that more severe EAE in IL-9R-/- mice correlates with increased numbers of GM-CSF+ CD4+ T cells and inflammatory dendritic cells (DCs) in the CNS. Furthermore, DCs from IL-9R-/- mice induced more GM-CSF production by T cells and exacerbated EAE upon adoptive transfer than did wild-type DCs. Our results suggest that IL-9 reduces autoimmune neuroinflammation by suppressing GM-CSF production by CD4+ T cells through the modulation of DCs.


Assuntos
Sistema Nervoso Central/fisiologia , Células Dendríticas/imunologia , Encefalomielite Autoimune Experimental/imunologia , Fator Estimulador de Colônias de Granulócitos e Macrófagos/metabolismo , Interleucina-9/metabolismo , Esclerose Múltipla/imunologia , Células Th17/imunologia , Transferência Adotiva , Animais , Autoimunidade , Células Cultivadas , Modelos Animais de Doenças , Humanos , Mediadores da Inflamação/metabolismo , Camundongos , Camundongos Endogâmicos C57BL , Camundongos Knockout , Receptores de Interleucina-9/genética
13.
J Neurol Neurosurg Psychiatry ; 89(5): 513-517, 2018 05.
Artigo em Inglês | MEDLINE | ID: mdl-29175893

RESUMO

OBJECTIVE: We examined the correlation between the dosing regimen of oral prednisolone (PSL) and the achievement of minimal manifestation status or better on PSL ≤5 mg/day lasting >6 months (the treatment target) in patients with generalised myasthenia gravis (MG). METHODS: We classified 590 patients with generalised MG into high-dose (n=237), intermediate-dose (n=187) and low-dose (n=166) groups based on the oral PSL dosing regimen, and compared the clinical characteristics, previous treatments other than PSL and prognosis between three groups. The effect of oral PSL dosing regimen on the achievement of the treatment target was followed for 3 years of treatment. RESULTS: To achieve the treatment target, ORs for low-dose versus high-dose regimen were 10.4 (P<0.0001) after 1 year of treatment, 2.75 (P=0.007) after 2 years and 1.86 (P=0.15) after 3 years; and those for low-dose versus intermediate-dose regimen were 13.4 (P<0.0001) after 1 year, 3.99 (P=0.0003) after 2 years and 4.92 (P=0.0004) after 3 years. Early combined use of fast-acting treatment (OR: 2.19 after 2 years, P=0.02; OR: 2.11 after 3 years, P=0.04) or calcineurin inhibitors (OR: 2.09 after 2 years, P=0.03; OR: 2.36 after 3 years, P=0.02) was associated positively with achievement of treatment target. CONCLUSION: A low-dose PSL regimen with early combination of other treatment options may ensure earlier achievement of the treatment target in generalised MG.


Assuntos
Miastenia Gravis/tratamento farmacológico , Prednisolona/uso terapêutico , Administração Oral , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Estudos Transversais , Relação Dose-Resposta a Droga , Quimioterapia Combinada , Feminino , Glucocorticoides/uso terapêutico , Humanos , Japão , Masculino , Pessoa de Meia-Idade , Prednisolona/administração & dosagem , Prognóstico , Resultado do Tratamento , Adulto Jovem
14.
BMJ Open ; 7(2): e013278, 2017 02 23.
Artigo em Inglês | MEDLINE | ID: mdl-28235967

RESUMO

OBJECTIVES: To clarify the social disadvantages associated with myasthenia gravis (MG) and examine associations with its disease and treatment. DESIGN: Cross-sectional study. SETTING AND PARTICIPANTS: We evaluated 917 consecutive cases of established MG seen at 13 neurological centres in Japan over a short duration. OUTCOME MEASURES: All patients completed a questionnaire on social disadvantages resulting from MG and its treatment and a 15-item MG-specific quality of life scale at study entry. Clinical severity at the worst condition was graded according to the MG Foundation of America classification, and that at the current condition was determined according to the quantitative MG score and MG composite. Maximum dose and duration of dose ≥20 mg/day of oral prednisolone during the disease course were obtained from the patients' medical records. Achievement of the treatment target (minimal manifestation status with prednisolone at ≤5 mg/day) was determined at 1, 2 and 4 years after starting treatment and at study entry. RESULTS: We found that 27.2% of the patients had experienced unemployment, 4.1% had been unwillingly transferred and 35.9% had experienced a decrease in income, 47.1% of whom reported that the decrease was ≥50% of their previous total income. In addition, 49.0% of the patients reported feeling reduced social positivity. Factors promoting social disadvantages were severity of illness, dose and duration of prednisolone, long-term treatment, and a depressive state and change in appearance after treatment with oral steroids. Early achievement of the treatment target was a major inhibiting factor. CONCLUSIONS: Patients with MG often experience unemployment, unwilling job transfers and a decrease in income. In addition, many patients report feeling reduced social positivity. To inhibit the social disadvantages associated with MG and its treatment, greater focus needs to be placed on helping patients with MG resume a normal lifestyle as soon as possible by achieving the treatment target.


Assuntos
Depressão/epidemiologia , Renda/estatística & dados numéricos , Miastenia Gravis/psicologia , Desemprego/estatística & dados numéricos , Adulto , Idoso , Idoso de 80 Anos ou mais , Estudos Transversais , Feminino , Humanos , Japão , Modelos Logísticos , Masculino , Pessoa de Meia-Idade , Análise Multivariada , Miastenia Gravis/tratamento farmacológico , Prednisolona/administração & dosagem , Escalas de Graduação Psiquiátrica , Qualidade de Vida , Índice de Gravidade de Doença , Apoio Social , Inquéritos e Questionários , Adulto Jovem
15.
Muscle Nerve ; 55(6): 794-801, 2017 06.
Artigo em Inglês | MEDLINE | ID: mdl-27603432

RESUMO

INTRODUCTION: In this study we sought to clarify the effects of early fast-acting treatment (EFT) strategies on the time course for achieving the treatment target in generalized myasthenia gravis (MG). METHODS: This retrospective study of 923 consecutive MG patients analyzed 688 generalized MG patients who had received immunotherapy during the disease course. The time to first achieve minimal manifestations (MM) or better while receiving prednisolone at ≤5 mg/day for ≥6 months (MM-or-better-5mg) up to 120 months after starting immunotherapy was compared between EFT and non-EFT patients. RESULTS: Achievement of MM-or-better-5mg was more frequent and earlier in the EFT group (P = 0.0004, Wilcoxon test; P = 0.0001, log-rank test). Multivariate Cox regression analysis calculated a hazard ratio of 1.98 (P < 0.0001) for utilization of EFT. Dosing regimens of oral steroids in EFT produced no differences in the time course. CONCLUSIONS: EFT strategies are advantageous for early achievement of MM-or-better-5mg. Muscle Nerve 55: 794-801, 2017.


Assuntos
Anti-Inflamatórios/uso terapêutico , Imunoterapia/métodos , Miastenia Gravis/tratamento farmacológico , Prednisolona/uso terapêutico , Adulto , Idoso , Estudos de Coortes , Feminino , Humanos , Japão , Masculino , Pessoa de Meia-Idade , Estatísticas não Paramétricas , Fatores de Tempo
16.
BMC Neurol ; 16(1): 225, 2016 Nov 17.
Artigo em Inglês | MEDLINE | ID: mdl-27855632

RESUMO

BACKGROUND: We have previously reported using two-step cluster analysis to classify myasthenia gravis (MG) patients into the following five subtypes: ocular MG; thymoma-associated MG; MG with thymic hyperplasia; anti-acetylcholine receptor antibody (AChR-Ab)-negative MG; and AChR-Ab-positive MG without thymic abnormalities. The objectives of the present study were to examine the reproducibility of this five-subtype classification using a new data set of MG patients and to identify additional characteristics of these subtypes, particularly in regard to response to treatment. METHODS: A total of 923 consecutive MG patients underwent two-step cluster analysis for the classification of subtypes. The variables used for classification were sex, age of onset, disease duration, presence of thymoma or thymic hyperplasia, positivity for AChR-Ab or anti-muscle-specific tyrosine kinase antibody, positivity for other concurrent autoantibodies, and disease condition at worst and current. The period from the start of treatment until the achievement of minimal manifestation status (early-stage response) was determined and then compared between subtypes using Kaplan-Meier analysis and the log-rank test. In addition, between subtypes, the rate of the number of patients who maintained minimal manifestations during the study period/that of patients who only achieved the status once (stability of improved status) was compared. RESULTS: As a result of two-step cluster analysis, 923 MG patients were classified into five subtypes as follows: ocular MG (AChR-Ab-positivity, 77%; histogram of onset age, skewed to older age); thymoma-associated MG (100%; normal distribution); MG with thymic hyperplasia (89%; skewed to younger age); AChR-Ab-negative MG (0%; normal distribution); and AChR-Ab-positive MG without thymic abnormalities (100%, skewed to older age). Furthermore, patients classified as ocular MG showed the best early-stage response to treatment and stability of improved status, followed by those classified as thymoma-associated MG and AChR-Ab-positive MG without thymic abnormalities; by contrast, those classified as AChR-Ab-negative MG showed the worst early-stage response to treatment and stability of improved status. CONCLUSIONS: Differences were seen between the five subtypes in demographic characteristics, clinical severity, and therapeutic response. Our five-subtype classification approach would be beneficial not only to elucidate disease subtypes, but also to plan treatment strategies for individual MG patients.


Assuntos
Miastenia Gravis/mortalidade , Índice de Gravidade de Doença , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Criança , Análise por Conglomerados , Feminino , Humanos , Japão , Estimativa de Kaplan-Meier , Masculino , Pessoa de Meia-Idade , Miastenia Gravis/complicações , Miastenia Gravis/tratamento farmacológico , Miastenia Gravis/imunologia , Miastenia Gravis/patologia , Reprodutibilidade dos Testes , Timoma/complicações , Neoplasias do Timo/complicações , Adulto Jovem
18.
PLoS One ; 10(5): e0126579, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-25965387

RESUMO

PURPOSE: To investigate the association between glucocorticoid-induced osteoporosis and myasthenia gravis (MG) using a cross-sectional survey in Japan. METHODS: We studied 363 patients with MG (female 68%; mean age, 57 ± 16 years) who were followed at six Japanese centers between April and July 2012. We evaluated the clinical information of MG and fractures, bone markers, and radiological assessment. Quality of life was measured using an MG-specific battery, MG-QOL15. RESULTS: Glucocorticoids were administered in 283 (78%) of 363 MG patients. Eighteen (6%) of 283 MG patients treated with prednisolone had a history of osteoporotic fractures. The duration of glucocorticoid therapy, but not the dose of prednisolone, was associated with the osteoporotic fractures in MG patients. Bone mineral density was significantly decreased in the MG patients with fractures. The multivariate analyses showed that the total quantitative MG score was the only independent factor associated with osteoporotic fractures (OR = 1.30, 95% CI 1.02-1.67, p = 0.03). MG patients who had experienced fractures reported more severe difficulties in activities of daily living. CONCLUSION: Glucocorticoid-induced osteoporosis aggravates quality of life in patients with MG.


Assuntos
Fraturas Ósseas/fisiopatologia , Glucocorticoides/efeitos adversos , Miastenia Gravis/fisiopatologia , Osteoporose/fisiopatologia , Adulto , Idoso , Densidade Óssea , Feminino , Fraturas Ósseas/induzido quimicamente , Fraturas Ósseas/epidemiologia , Humanos , Masculino , Pessoa de Meia-Idade , Miastenia Gravis/induzido quimicamente , Miastenia Gravis/epidemiologia , Osteoporose/induzido quimicamente , Osteoporose/epidemiologia , Qualidade de Vida
19.
Muscle Nerve ; 51(5): 692-6, 2015 May.
Artigo em Inglês | MEDLINE | ID: mdl-25155615

RESUMO

INTRODUCTION: The aim of this study was to elucidate the effectiveness of oral prednisolone (PSL) according to dosing regimen in 472 patients with myasthenia gravis (MG). METHODS: We compared the clinical characteristics and PSL treatment between 226 patients who achieved minimal manifestations (MM) or better and 246 patients who remained improved (I) or worsened, according to the MG Foundation of America postintervention status. RESULTS: Achievement of MM or better at peak PSL dose (odds ratio 12.25, P < 0.0001) and combined use of plasma exchange/plasmapheresis (PE/PP) and/or intravenous immunoglobulin (IVIg) (odds ratio 1.92, P = 0.04) were associated positively, and total PSL dose during the past year (odds ratio 0.17, P = 0.03) was associated negatively with present MM or better status. CONCLUSIONS: Higher PSL dose and longer PSL treatment do not ensure better outcome. In the absence of a good response, the PSL dose should be decreased by combining with modalities such as PE/PP or IVIg.


Assuntos
Corticosteroides/administração & dosagem , Corticosteroides/uso terapêutico , Miastenia Gravis/tratamento farmacológico , Prednisolona/administração & dosagem , Prednisolona/uso terapêutico , Índice de Gravidade de Doença , Administração Oral , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Terapia Combinada , Estudos Transversais , Relação Dose-Resposta a Droga , Feminino , Humanos , Imunoglobulinas Intravenosas/uso terapêutico , Japão , Estudos Longitudinais , Masculino , Pessoa de Meia-Idade , Miastenia Gravis/diagnóstico , Troca Plasmática , Análise de Regressão , Resultado do Tratamento , Adulto Jovem
20.
BMC Neurol ; 14: 142, 2014 Jul 05.
Artigo em Inglês | MEDLINE | ID: mdl-24996227

RESUMO

BACKGROUND: Since there has been no conclusive evidence regarding the treatment of ocular myasthenia, treatment guidelines were recently issued by the European Federation of Neurological Societies/European Neurological Society (EFNS/ENS). However, the therapeutic outcomes concerning the quality-of-life (QOL) of patients with ocular myasthenia are not yet fully understood. METHODS: We investigated the therapeutic outcomes of patients with purely ocular myasthenia in a multicenter cross-sectional survey in Japan. To evaluate the severity of ocular symptoms, we used the ocular-quantitative MG (QMG) score advocated by Myasthenia Gravis Foundation of America. We used the Japanese translated version of the MG-QOL15, a self-appraised scoring system. RESULTS: Of 607 myasthenia gravis (MG) patients with an observation-duration of illness ≥ 2 years, the cases of 123 patients (20%) were limited to ocular muscles (purely ocular myasthenia). During the entire clinical course, 81 patients experienced both ptosis and diplopia, 36 had ptosis alone, and six had diplopia alone. Acetyl-cholinesterase inhibitors and prednisolone were used in 98 and 52 patients, respectively. Treatment improved ocular symptoms, with the mean reduction in ocular-QMG score of 2.3 ± 1.8 points. However, 47 patients (38%) failed to gain minimal manifestation or a better status. Patients with unfavorable outcomes also self-reported severe QOL impairment. Multivariate analyses showed that the pretreatment ocular-QMG score was associated with unfavorable outcomes, but not associated with the patient's QOL. CONCLUSION: A treatment strategy designed in accord with a patient's ocular presentation must be considered in order to improve ocular symptoms and the patient's QOL.


Assuntos
Miastenia Gravis/complicações , Miastenia Gravis/tratamento farmacológico , Qualidade de Vida , Anti-Inflamatórios/uso terapêutico , Inibidores da Colinesterase/uso terapêutico , Estudos Transversais , Feminino , Humanos , Japão , Masculino , Pessoa de Meia-Idade , Prednisolona/uso terapêutico
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