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dermatomyositis myositis specific antibody

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https://www.readbyqxmd.com/read/28776361/first-report-of-anti-tif1%C3%AE-dermatomyositis-in-a-patient-with-myelodysplastic-syndrome
#1
B Palterer, G Vitiello, D Cammelli
Inflammatory myopathies as para-neoplastic phenomena were first described by Sterz in 1916. Recently, myositis specific autoantibodies were described in cancer-associated myositis. Anti-transcription intermediary factor 1 gamma (anti-TIF1γ) antibodies have been found in both young adults affected by juvenile dermatomyositis and in elderly patients with cancer-associated myositis. In this regard, we report herein the first case of anti-TIF1γ dermatomyositis secondary to a myelodysplastic syndrome.
August 3, 2017: Reumatismo
https://www.readbyqxmd.com/read/28687351/prevalence-of-anti-nt5c1a-antibodies-in-japanese-patients-with-autoimmune-rheumatic-diseases-in-comparison-with-other-patient-cohorts
#2
Yoshinao Muro, Hirotaka Nakanishi, Masahisa Katsuno, Michihiro Kono, Masashi Akiyama
BACKGROUND: Sporadic inclusion body myositis (sIBM) is usually classified as an idiopathic inflammatory myopathies. Although the diagnosis of sIBM is sometimes challenging, recent studies have shown that the autoantibodies against cytosolic 5'-nucleotidase 1A (NT5C1A) are the possible diagnostic biomarker for sIBM. Few reports have shown the frequencies of anti-NT5C1A antibodies in systemic autoimmune rheumatic diseases (SARDs) using large cohorts of SARDs. METHODS: Serum samples obtained from 314 patients including dermatomyositis (DM) (n=144), systemic lupus erythematosus (SLE) (n=50), systemic sclerosis (SSc) (n=50), Sjögren's syndrome (SS) (n=50), polymyositis (PM) (n=10) and mixed connective tissue disease (n=10), and healthy controls (n=42) in addition to 10 patients with typical sIBM were analysed for the presence of autoantibodies using full-length recombinant NT5C1A ELISA...
July 4, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28673815/autoantibodies-to-su-argonaute-2-in-japanese-patients-with-inflammatory-myopathy
#3
Mariko Ogawa-Momohara, Yoshinao Muro, Minoru Satoh, Masashi Akiyama
BACKGROUND: Anti-Su antibodies are found in 5-20% of cases of various systemic autoimmune rheumatic diseases and in 5-10% of dermatomyositis (DM)/polymyositis (PM) patients. In 2006, the 100kDa Su antigen was identified as argonaute2 (Ago2), and it was found to play a major role in RNA interference. However, immunoprecipitation (IP) remains the main method for detecting anti-Su and the clinical significance of the antibodies is uncertain. METHODS: Sera from patients with DM/PM (n=224) were screened by an ELISA that uses recombinant biotinylated Ago2 protein...
June 30, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28524083/idiopathic-inflammatory-myopathies-a-review-of-the-classification-and-impact-of-pathogenesis
#4
REVIEW
Dana E Mandel, Charles J Malemud, Ali D Askari
Idiopathic inflammatory myopathies (IIMs) are a group of autoimmune muscle diseases with significant morbidity and mortality. This review details and updates the pathogenesis and emerging importance of myositis-specific antibodies in the development of IIMs. An increase in the understanding of how these myositis-specific antibodies play a role in IIMs has led to the further categorization of IIMs from the traditional polymyositis versus dermatomyositis, to additional subcategories of IIMs such as necrotizing autoimmune myositis (NAM)...
May 18, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28479486/integrated-diagnosis-project-for-inflammatory-myopathies-an-association-between-autoantibodies-and-muscle-pathology
#5
REVIEW
Shigeaki Suzuki, Akinori Uruha, Norihiro Suzuki, Ichizo Nishino
Inflammatory myopathies are a heterogeneous group of immune-mediated diseases that involve skeletal muscle as well as many other organs. The classification of inflammatory myopathies has been based on clinical diagnoses, pathological diagnoses, and autoantibodies, independently. The clinical phenotypes of inflammatory myopathies are characterized by various autoantibodies that are originally detected by RNA or protein immunoprecipitation. However, since the correlation between histological features and autoantibodies had not been fully elucidated, we created the "Integrated Diagnosis Project for Inflammatory Myopathies" in October 2010...
May 4, 2017: Autoimmunity Reviews
https://www.readbyqxmd.com/read/28473041/diagnosis-and-management-of-immune-mediated-myopathies
#6
REVIEW
Margherita Milone
Immune-mediated myopathies (IMMs) are a heterogeneous group of acquired muscle disorders characterized by muscle weakness, elevated creatine kinase levels, and myopathic electromyographic findings. Most IMMs feature the presence of inflammatory infiltrates in muscle. However, the inflammatory exudate may be absent. Indeed, necrotizing autoimmune myopathy (NAM), also called immune-mediated necrotizing myopathy, is characterized by a necrotizing pathologic process with no or minimal inflammation in muscle. The recent discovery of antibodies associated with specific subtypes of autoimmune myopathies has played a major role in characterizing these diseases...
May 2017: Mayo Clinic Proceedings
https://www.readbyqxmd.com/read/28461832/new-insights-into-antisynthetase-syndrome
#7
Manole Cojocaru, Inimioara Mihaela Cojocaru, Bogdan Chicos
Antisynthetase syndrome (ASS) is a rare chronic autoimmune disorder (2-3 times more common in women than in men), associated with interstitial lung disease (the most important feature), dermatomyositis (DM), and polymyositis (PM). The cause of ASS is unknown. Recent developments in immunology have improved our knowledge and it is now possible to classify ASS according to the presence of myositis specific autoantibodies. The hallmark of ASS is the presence of serum autoantibodies directed against aminoacyl-tRNA synthetases (anti-ARS involved in protein synthesis)...
June 2016: Mædica
https://www.readbyqxmd.com/read/28461123/the-long-term-outcome-of-interstitial-lung-disease-with-anti-aminoacyl-trna-synthetase-antibodies
#8
Kiminobu Tanizawa, Tomohiro Handa, Ran Nakashima, Takeshi Kubo, Yuji Hosono, Kizuku Watanabe, Kensaku Aihara, Kohei Ikezoe, Akihiko Sokai, Yoshinari Nakatsuka, Yoshio Taguchi, Kazuhiro Hatta, Satoshi Noma, Yoichiro Kobashi, Akihiko Yoshizawa, Toru Oga, Toyohiro Hirai, Kazuo Chin, Sonoko Nagai, Takateru Izumi, Tsuneyo Mimori, Michiaki Mishima
RATIONALE: Anti-aminoacyl transfer RNA synthetase antibodies (anti-ARS) are a group of myositis-specific autoantibodies that are detected in the sera of patients with polymyositis and dermatomyositis (PM/DM) and also in those of patients with idiopathic interstitial pneumonias without any connective tissue disease (CTD), including PM/DM. Although we reported the clinical characteristics of interstitial lung disease with anti-ARS antibodies (ARS-ILD) with and without PM/DM, the long-term prognosis of ARS-ILD remains undetermined...
June 2017: Respiratory Medicine
https://www.readbyqxmd.com/read/28183315/pyruvate-kinase-m2-and-the-mitochondrial-atpase-inhibitory-factor-1-provide-novel-biomarkers-of-dermatomyositis-a-metabolic-link-to-oncogenesis
#9
Fulvio Santacatterina, María Sánchez-Aragó, Marc Catalán-García, Glòria Garrabou, Cristina Nuñez de Arenas, Josep M Grau, Francesc Cardellach, José M Cuezva
BACKGROUND: Metabolic alterations play a role in the development of inflammatory myopathies (IMs). Herein, we have investigated through a multiplex assay whether proteins of energy metabolism could provide biomarkers of IMs. METHODS: A cohort of thirty-two muscle biopsies and forty plasma samples comprising polymyositis (PM), dermatomyositis (DM) and sporadic inclusion body myositis (sIBM) and control donors was interrogated with monoclonal antibodies against proteins of energy metabolism using reverse phase protein microarrays (RPPA)...
February 10, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/28045754/anti-nxp2-positive-paraneoplastic-dermatomyositis-with-histopathologic-changes-confined-to-the-acrosyringia
#10
Jose Luis Ramírez-Bellver, Elena Macías, Claudia Bernárdez, Joaquín López-Robles, Maria Del Carmen Vegas-Sánchez, Jose Luis Díaz-Recuero, Hernán Quiceno, Luis Requena
BACKGROUND: Paraneoplastic syndromes consist of a group of disorders that are not related to the extension of the primary tumor or its metastases and that might be the first manifestation of a hidden neoplasm. It is a well-known association between dermatomyositis (DM) and cancer, especially gynecological tumors in women and lung cancer in men. METHODS: We describe the case of a 67-year-old male who developed muscular weakness and pruritic skin lesions. Skin biopsies were performed and histologic findings were consistent with DM...
January 2017: American Journal of Dermatopathology
https://www.readbyqxmd.com/read/28039312/sarcoplasmic-mxa-expression-a-valuable-marker-of-dermatomyositis
#11
Akinori Uruha, Atsuko Nishikawa, Rie S Tsuburaya, Kohei Hamanaka, Masataka Kuwana, Yurika Watanabe, Shigeaki Suzuki, Norihiro Suzuki, Ichizo Nishino
OBJECTIVE: To evaluate the diagnostic value of myxovirus resistance A (MxA) expression in the cytoplasm of myofibers in the diagnosis of dermatomyositis (DM). METHODS: We assessed the sensitivity and specificity of the sarcoplasmic expression of MxA in muscles with DM by immunohistochemistry in consecutive cases of DM (n = 34) and other idiopathic inflammatory myopathies (n = 120: 8 with polymyositis, 16 with anti-tRNA-synthetase antibody-associated myositis, 46 with immune-mediated necrotizing myopathy, and 50 with inclusion body myositis) and compared them with conventional pathologic hallmarks of DM, including perifascicular atrophy (PFA) and membrane attack complex (MAC) deposition on endomysial capillaries...
January 31, 2017: Neurology
https://www.readbyqxmd.com/read/27928683/specific-autoantibodies-in-dermatomyositis-a-helpful-tool-to-classify-different-clinical-subsets
#12
Giulia Merlo, Andrea Clapasson, Emanuele Cozzani, Luigi Sanna, Giampaola Pesce, Marcello Bagnasco, Martina Burlando, Aurora Parodi
Autoantibodies are important in the diagnosis of dermatomyositis. They can be divided in two different groups: myositis-associated autoantibodies (MAA) prevailing in overlap syndromes, and myositis-specific autoantibodies (MSA), with diagnostic specificity exceeding 90%. Our purpose was to detect retrospectively the prevalence of the most common MSAs in a group of 19 adult DM patients (13 women, 6 men). A severe DM (SDM), with extensive cutaneous and muscular manifestations, dysphagia, and sometimes pneumopathy, was detected in ten cases...
March 2017: Archives of Dermatological Research
https://www.readbyqxmd.com/read/27888997/comprehensive-assessment-of-myositis-specific-autoantibodies-in-polymyositis-dermatomyositis-associated-interstitial-lung-disease
#13
Hironao Hozumi, Tomoyuki Fujisawa, Ran Nakashima, Takeshi Johkoh, Hiromitsu Sumikawa, Akihiro Murakami, Noriyuki Enomoto, Naoki Inui, Yutaro Nakamura, Yuji Hosono, Yoshitaka Imura, Tsuneyo Mimori, Takafumi Suda
OBJECTIVES: Myositis-specific autoantibodies (MSAs) are associated with clinical phenotypes in polymyositis/dermatomyositis (PM/DM). No study has investigated the clinical features based on comprehensive MSA assessment in PM/DM-associated interstitial lung disease (ILD). We aimed to determine the practical significance of MSAs in PM/DM-ILD. METHODS: Sixty consecutive PM/DM-ILD patients were retrospectively analysed. Serum MSAs were comprehensively measured using immunoprecipitation assay...
December 2016: Respiratory Medicine
https://www.readbyqxmd.com/read/27761751/myositis-specific-autoantibodies-and-their-association-with-malignancy-in-italian-patients-with-polymyositis-and-dermatomyositis
#14
Angela Ceribelli, Natasa Isailovic, Maria De Santis, Elena Generali, Micaela Fredi, Ilaria Cavazzana, Franco Franceschini, Luca Cantarini, Minoru Satoh, Carlo Selmi
This study aims to characterize myositis-specific antibodies in a well-defined cohort of patients with idiopathic inflammatory myopathy and to determine their association with cancer. Sera from 40 patients with polymyositis, dermatomyositis, and controls were tested by protein and RNA immunoprecipitation to detect autoantibodies, and immunoprecipitation-Western blot was used for anti-MJ/NXP-2, anti-MDA5, and anti-TIF1γ/α identification. Medical records were re-evaluated with specific focus on cancer. Anti-MJ/NXP-2 and anti-TIF1γ/α were the most common antibodies in dermatomyositis...
February 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/27606477/juvenile-dermatomyositis-with-anti-signal-recognition-particle-antibodies-a-case-report
#15
S Almeida, M Braga, M J Santos
Serologic investigation has been explored in inflammatory myopathies in order to define subgroups that can help us predict clinical course, treatment and prognosis. The level of similarity between juvenile and adult myopathies regarding the presence of myositis-specific autoantibodies has not been fully elucidated. We report the case of a 8-year-old girl who presented with a rapid progression of muscle weakness and cutaneous signs consistent with the diagnosis of juvenile dermatomyositis and whose serologic testing revealed the presence of anti-signal recognition particle (SRP) antibodies...
April 2016: Acta Reumatológica Portuguesa
https://www.readbyqxmd.com/read/27538058/advances-in-serological-diagnostics-of-inflammatory-myopathies
#16
Olivier Benveniste, Werner Stenzel, Yves Allenbach
PURPOSE OF REVIEW: Inflammatory myopathies are rare diseases. Their diagnosis criteria are historically based on their clinical phenotype (topography of the muscle weakness, presence of skin lesions and/or of extra-skin/muscle signs) and the presence of inflammatory infiltrates on muscle biopsy. However, the recent discovery of different myositis-specific antibodies (MSA) or myositis-associated antibodies (MAA) permitted to revisit these old classifications. This review covers recent findings in clinical and pathological phenotypes regarding prognosis, associated cancer and response to the treatment based on MSA/MAA categorization...
October 2016: Current Opinion in Neurology
https://www.readbyqxmd.com/read/27477574/a-case-of-anti-nuclear-matrix-protein-2-antibody-positive-myopathy-associated-with-lung-cancer
#17
Shin Ohta, Ki-Ichi Unoda, Hideto Nakajima, Soichiro Ikeda, Yasuhito Hamaguchi, Fumiharu Kimura
Myositis-specific autoantibodies (MSAs) are associated with myositis. Anti-nuclear matrix protein 2 (NXP-2) antibody was recently identified as a major MSA and was observed mostly in juvenile dermatomyositis. We report the case of a 44-year-old man who presented with myopathy with anti-NXP-2 antibody and large cell carcinoma of the lung. He was hospitalized because of myalgia and edema of limbs. Neurological examination revealed mild proximal-dominant weakness in all four extremities, and laboratory studies showed elevated creatine kinase level (6,432 IU/l)...
August 31, 2016: Rinshō Shinkeigaku, Clinical Neurology
https://www.readbyqxmd.com/read/27295700/autoantibodies-in-adult-patients-with-idiopathic-inflammatory-myopathies-in-buenos-aires
#18
Graciela N Gómez, María De Los Ángeles Gargiulo, Nicolás Pérez, María Victoria Collado, Lorena V Suárez, Marina Khoury, Judith F Sarano
The idiopathic inflammatory myopathies(IIM) are a heterogeneous group of diseases of the skeletal muscle. On the basis of clinical, serologic and histological differences, they are classified in dermatomyositis (DM), polymyositis (PM), inclusion body myositis and immunomediated necrotizing myopathy. Autoantibodies directed against nuclear and cytoplasmic antigens are present with variable frequencies among studies. Myositis-specific antibodies (MSAs) are useful in IIM because they contribute to the diagnosis, help to identify different clinical subsets, and have prognostic value...
2016: Medicina
https://www.readbyqxmd.com/read/27242652/idiopathic-inflammatory-myopathies-clinical-approach-and-management
#19
REVIEW
Asma Malik, Ghazala Hayat, Junaid S Kalia, Miguel A Guzman
Idiopathic inflammatory myopathies (IIM) are a group of chronic, autoimmune conditions affecting primarily the proximal muscles. The most common types are dermatomyositis (DM), polymyositis (PM), necrotizing autoimmune myopathy (NAM), and sporadic inclusion body myositis (sIBM). Patients typically present with sub-acute to chronic onset of proximal weakness manifested by difficulty with rising from a chair, climbing stairs, lifting objects, and combing hair. They are uniquely identified by their clinical presentation consisting of muscular and extramuscular manifestations...
2016: Frontiers in Neurology
https://www.readbyqxmd.com/read/27212600/reliability-and-clinical-utility-of-enzyme-linked-immunosorbent-assay-for-detection-of-anti-aminoacyl-trna-synthetase-antibody
#20
COMPARATIVE STUDY
Takeo Abe, Shinichiro Tsunoda, Aki Nishioka, Kouta Azuma, Kazuyuki Tsuboi, Chie Ogita, Yuichi Yokoyama, Tetsuya Furukawa, Momo Maruoka, Masao Tamura, Takahiro Yoshikawa, Atsushi Saito, Masahiro Sekiguchi, Naoto Azuma, Masayasu Kitano, Kiyoshi Matsui, Yuji Hosono, Ran Nakashima, Koichiro Ohmura, Tsuneyo Mimori, Hajime Sano
  Anti-aminoacyl-tRNA synthetase (ARS) antibody is one of the myositis-specific autoantibodies to make a diagnosis of polymyositis (PM) and dermatomyositis (DM). Recently a new enzyme-linked immunosorbent assay (ELISA) kit of concurrently detected anti-ARS antibodies (anti-Jo-1, anti-PL-7, anti-PL-12, anti-EJ and anti-KS) have become to measure in the clinical setting. To evaluate the reliability of this ELISA kit, we measured anti-ARS antibodies in 75 PM and DM patients using by this ELISA assay and compared them with the results by RNA immunoprecipitation assay...
2016: Nihon Rinshō Men'eki Gakkai Kaishi, Japanese Journal of Clinical Immunology
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