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MDA5 antibody

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https://www.readbyqxmd.com/read/29713969/rituximab-for-refractory-rapidly-progressive-interstitial-lung-disease-related-to-anti-mda5-antibody-positive-amyopathic-dermatomyositis
#1
Ho So, Victor Tak Lung Wong, Virginia Weng Nga Lao, Hin Ting Pang, Ronald Man Lung Yip
To report our experience in using rituximab (RTX) for treating refractory rapidly progressive interstitial lung disease (RP-ILD) complicating anti-melanoma differentiation-associated gene 5 antibody (anti-MDA5 Ab)-positive amyopathic dermatomyositis (ADM). Medical records of four ADM patients with refractory RP-ILD treated with RTX therapy were reviewed retrospectively. All four patients were tested positive for anti-MDA5 Ab and failed to respond to high-dose systemic steroid and other intensive immunosuppressive therapies...
April 30, 2018: Clinical Rheumatology
https://www.readbyqxmd.com/read/29706970/h7n9-avian-influenza-virus-is-efficiently-transmissible-and-induces-an-antibody-response-in-chickens
#2
Peirong Jiao, Yafen Song, Jianni Huang, Chengwei Xiang, Jin Cui, Siyu Wu, Nannan Qu, Nianchen Wang, Guowen Ouyang, Ming Liao
H7N9 viruses pose a threat to human health and they are no less harmful to the poultry industry than the H5N1 avian influenza viruses. However, the pathogenesis, transmissibility, and the host immune response of the H7N9 virus in chickens and mice remain unclear. In this study, we found that H7N9 viruses replicated in multiple organs of the chicken and viral shedding persisted up to 30 days postinoculation (DPI). The viruses were efficiently transmitted between chickens through direct contact. Notably, chickens infected with H7N9 had high antibody levels throughout the entire observation period and their antibody response lasted for 30 DPI...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29657141/association-of-serum-soluble-cd163-with-polymyositis-and-dermatomyositis-especially-in-anti-mda5-antibody-positive-cases
#3
Hidenaga Kawasumi, Yasuhiro Katsumata, Akira Nishino, Shinya Hirahara, Yasushi Kawaguchi, Masataka Kuwana, Hisashi Yamanaka
OBJECTIVE: We elucidated the association of serum soluble CD163 (sCD163) with rapidly progressive interstitial lung disease (RP-ILD), autoantibody profiles, and serum ferritin in patients with polymyositis (PM), classic dermatomyositis (DM), and clinical amyopathic dermatomyositis (CADM). METHODS: Serum sCD163 levels were retrospectively measured by ELISA in patients with PM, classic DM, and CADM, as well as in healthy controls (HC). Repeat sera samples were obtained posttreatment from available patients...
April 15, 2018: Journal of Rheumatology
https://www.readbyqxmd.com/read/29579373/calcinosis-of-the-mandible-in-dermatomyositis
#4
Andrea Fava, Lisa Christopher-Stine
A 52-year-old woman presented to the Rheumatology clinic complaining of new tender nodules along the inferior border of her jaw. She has an 8-year history of amyopathic dermatomyositis with anti-MDA5 antibodies complicated by interstitial lung disease. Her current treatments include tacrolimus, prednisone and hydroxychloroquine. She noticed the nodules during the most recent flare of her skin disease one month prior. On exam, she had 2 tender, hard, mobile nodules measuring approximately 5mm each located at 4cm and 2...
March 26, 2018: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/29532710/myositis-specific-autoantibodies-in-japanese-patients-with-juvenile-idiopathic-inflammatory-myopathies
#5
Masahiro Ueki, Ichiro Kobayashi, Shunichiro Takezaki, Yusuke Tozawa, Yuka Okura, Masafumi Yamada, Masataka Kuwana, Tadashi Ariga
OBJECTIVES: The aim of our study is to clarify the association of myositis-specific autoantibodies (MSAs) with clinical and laboratory features in Japanese patients with juvenile idiopathic inflammatory myopathies (JIIMs). METHODS: We retrospectively analyzed the frequency of MSAs and their association with clinical or laboratory findings in 25 Japanese patients with JIIMs in Hokkaido district. RESULTS: Eighteen of the 25 patients (72%) were positive for MSAs; seven with anti-melanoma differentiation associated gene (MDA) 5 (28%), five with anti-transcriptional intermediary factor (TIF)-1γ (20%), four with anti-MJ/nuclear matrix protein (NXP)-2 (16%), two with anti-Jo-1 (8%), one with anti- HMG-CoA reductase, one with anti-signal recognition peptide (SRP) antibodies (4% each), including co-existence and transition of MSAs in one patient each...
April 9, 2018: Modern Rheumatology
https://www.readbyqxmd.com/read/29529898/improved-quantification-of-a-commercial-enzyme-linked-immunosorbent-assay-kit-for-measuring-anti-mda5-antibody
#6
Takahisa Gono, Yuka Okazaki, Akihiro Murakami, Masataka Kuwana
OBJECTIVES: To compare the quantitative performance for measuring anti-MDA5 antibody titer of two enzyme-linked immunosorbent assay (ELISA) systems: an in-house ELISA and the commercial MESACUPTM anti-MDA5 test. METHODS: Anti-MDA5 antibody titer was measured in sera from 70 patients with dermatomyositis using an in-house ELISA and the MESACUPTM anti-MDA5 test side-by-side. For the commercial ELISA kit, serum samples diluted 1:101 were used according to the manufacturer's protocol, but serial dilutions of sera were also examined to identify the optimal serum dilution for quantification...
April 9, 2018: Modern Rheumatology
https://www.readbyqxmd.com/read/29474663/muscle-ischaemia-associated-with-nxp2-autoantibodies-a-severe-subtype-of-juvenile-dermatomyositis
#7
Jessie Aouizerate, Marie De Antonio, Brigitte Bader-Meunier, Christine Barnerias, Christine Bodemer, Arnaud Isapof, Pierre Quartier, Isabelle Melki, Jean-Luc Charuel, Guillaume Bassez, Isabelle Desguerre, Romain K Gherardi, François-Jérôme Authier, Cyril Gitiaux
Objectives: Myositis-specific autoantibodies (MSAs) are increasingly used to delineate distinct subgroups of JDM. The aim of our study was to explore without a priori hypotheses whether MSAs are associated with distinct clinical-pathological changes and severity in a monocentric JDM cohort. Methods: Clinical, biological and histological findings from 23 JDM patients were assessed. Twenty-six histopathological parameters were subjected to multivariate analysis. Results: Autoantibodies included anti-NXP2 (9/23), anti-TIF1γ (4/23), anti-MDA5 (2/23), no MSAs (8/23)...
May 1, 2018: Rheumatology
https://www.readbyqxmd.com/read/29441299/livedo-racemosa-reticulated-ulcerations-panniculitis-and-violaceous-plaques-in-a-46-year-old-woman
#8
Alfredo Agulló, Brian Hinds, Mónica Larrea, Ignacio Yanguas
Clinically amyopathic dermatomyositis (CADM) is a subset of dermatomyositis (DM) that has conventional cutaneous manifestations of DM, but paradoxically, little or no muscle involvement. In 2005, a novel antibody was described in association with CADM - anti-melanoma differentiation-associated gene 5 (anti-MDA5). Patients with this serologic marker have a characteristic mucocutaneous phenotype consisting of skin ulceration among other signs. We describe the case of a 46-year-old woman with CADM, elevated anti-MDA5 autoantibodies, and unusual clinical features (livedo racemosa, florid acral edema) among the classical phenotype of MDA5 DM (arthralgias, ulcerations, panniculitis) and classical DM lesions (Gottron papules, heliotrope rash)...
January 2018: Indian Dermatology Online Journal
https://www.readbyqxmd.com/read/29417209/rapidly-progressive-interstitial-lung-disease-due-to-anti-mda5-antibodies-without-skin-involvement-a-case-report-and-literature-review
#9
REVIEW
Juan González-Moreno, Manuel Raya-Cruz, Ines Losada-Lopez, Ana Paula Cacheda, Cristina Oliver, Bartomeu Colom
Anti-MDA5 antibodies have been strongly associated with rapidly progressive interstitial lung disease (RP-ILD) in dermatomyositis (DM) patients, especially in the clinically amyopathic subset (CADM). We present a case of anti-MDA5 antibody-associated RP-ILD in a patient with arthritis but with no other clinical signs suggestive of DM or CADM successfully treated with a combination of cyclophosphamide, cyclosporine and corticoids. A review of the literature was also done. Despite its rarity, anti-MDA5 antibody-associated ILD should be suspected in cases of RP-ILD even without other signs of DM or CADM as prompt and aggressive treatment could improve prognosis...
February 7, 2018: Rheumatology International
https://www.readbyqxmd.com/read/29380533/analysis-of-anti-melanoma-differentiation-associated-gene-5-antibody-in-hong-kong-chinese-patients-with-idiopathic-inflammatory-myopathies-diagnostic-utility-and-clinical-correlations
#10
Ho So, Ricky W-K Ip, Victor T-L Wong, Ronald M-L Yip
AIM: To compare the prevalence of the anti-melanoma differentiation-associated gene 5 antibody (anti-MDA5 Ab) in Hong Kong Chinese patients with dermatomyositis (DM) and polymyositis (PM); in addition, to examine the association of anti-MDA5 Ab and the clinical characteristics of these patients. METHODS: Twenty consecutive existing patients with DM being followed up at the Rheumatology Clinic of Kwong Wah Hospital, Hong Kong were recruited. Twenty patients with PM were recruited from the same clinic as the controls...
January 30, 2018: International Journal of Rheumatic Diseases
https://www.readbyqxmd.com/read/29338781/correlation-between-disease-activity-and-serum-ferritin-in-clinically-amyopathic-dermatomyositis-with-rapidly-progressive-interstitial-lung-disease-a-case-report
#11
Kazuhiro Yamada, Kazuhisa Asai, Atsuko Okamoto, Tetsuya Watanabe, Hiroshi Kanazawa, Mai Ohata, Masahiko Ohsawa, Kazuto Hirata
BACKGROUND: Clinically amyopathic dermatomyositis with anti-Melanoma Differentiation-Associated gene 5 (MDA5) antibody often presents with severe interstitial lung disease. Although serum ferritin level is known to reflect interstitial lung disease activity, there are few case reports describing this association. CASE PRESENTATION: A 58-year-old man was referred to our outpatient clinic with a 3-week history of cough and respiratory distress. He had erythema over the V area of the neck and a Gottron's sign...
January 16, 2018: BMC Research Notes
https://www.readbyqxmd.com/read/29301801/clinically-amyopathic-dermatomyositis-associated-with-anti-mda5-antibody
#12
Konstantinos Parperis, Amirali Kiyani
Clinically amyopathic dermatomyositis (CADM) is a rare entity that presents with cutaneous manifestations of classic dermatomyositis but without muscle weakness or abnormal muscle enzymes. It is more common in young white and Asian females. A subset of patients with CADM has a specific antibody known as anti-MDA5. These patients have a more aggressive course with distinct cutaneous features, pulmonary involvement and early death. Here, we present the case of a 64-year-old Caucasian male with no significant medical history who was admitted with marked weight loss and a painful rash for 6 months...
January 4, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29289262/clinical-heterogeneity-of-interstitial-lung-disease-in-polymyositis-and-dermatomyositis-patients-with-or-without-specific-autoantibodies
#13
COMPARATIVE STUDY
Fang Chen, Shanshan Li, Tao Wang, Jingli Shi, Guochun Wang
BACKGROUND: The aim of this study was to compare the heterogeneity of interstitial lung disease (ILD) in patients with polymyositis and dermatomyositis (PM/DM) according to serological type. METHODS: A total of 182 patients with PM/DM-ILD were observed retrospectively. Antiaminoacyl-tRNA synthetase (ARS) and antimelanoma differentiation-associated gene5 (MDA5) antibodies were screened using immunoblotting approach. The patients with ILD were divided into 3 groups: MDA5 (with anti-MDA5 antibody), ARS (with anti-ARS antibody) and MSN (without anti-MDA5 or anti-ARS antibody) group...
January 2018: American Journal of the Medical Sciences
https://www.readbyqxmd.com/read/29287518/anti-mda5-positive-dermatomyositis-complicated-with-rapidly-progressive-interstitial-lung-disease-a-case-report
#14
Eva De Backer, Félix Gremonprez, Guy Brusselle, Pieter Depuydt, Jo Van Dorpe, Carole Van Haverbeke, Pieter C Goeminne, Eric Derom
CASE PRESENTATION:  We present a case of a 55-year-old Caucasian male with manifestations of dermatomyositis complicated with rapidly progressive interstitial lung disease (RP-ILD). Diagnosis of anti-MDA5 positive dermatomyositis was made. DISCUSSION:  Myositis specific antibodies (MSA) can be used for diagnosis and predicting prognosis in patients with polymyositis and dermatomyositis. Anti-MDA5 positive dermatomyositis should be considered in patients presenting with dermatomyositis and a disease course resembling antisynthetase syndrome in the absence of antisynthetase autoantibodies, especially if a remarkably high ferritin is noted...
December 29, 2017: Acta Clinica Belgica
https://www.readbyqxmd.com/read/29225988/effective-administration-of-rituximab-in-anti-mda5-antibody-positive-dermatomyositis-with-rapidly-progressive-interstitial-lung-disease-and-refractory-cutaneous-involvement-a-case-report-and-literature-review
#15
Yuka Ogawa, Dai Kishida, Yasuhiro Shimojima, Koichi Hayashi, Yoshiki Sekijima
We describe the case of a 48-year-old man with dermatomyositis (DM) who demonstrated rapidly progressive interstitial lung disease (RP-ILD) and refractory cutaneous involvement together with high levels of anti-melanoma differentiation-associated gene 5 antibody (anti-MDA5-Ab). Even after combination immunosuppressive therapy including a corticosteroid, cyclosporine A, and intravenous cyclophosphamide, his respiratory insufficiency and cutaneous involvement progressively worsened. However, the administration of rituximab (RTX) resulted in clinical remission as well as a visible reduction in anti-MDA5-Ab levels, suggesting that RTX could be a useful remedy in cases refractory to conventional immunosuppressive agents, especially those of RP-ILD related to anti-MDA5-Ab-positive DM...
2017: Case Reports in Rheumatology
https://www.readbyqxmd.com/read/29186193/rig-i-like-receptor-activation-by-dengue-virus-drives-follicular-t-helper-cell-formation-and-antibody-production
#16
Joris K Sprokholt, Tanja M Kaptein, John L van Hamme, Ronald J Overmars, Sonja I Gringhuis, Teunis B H Geijtenbeek
Follicular T helper cells (TFH) are fundamental in orchestrating effective antibody-mediated responses critical for immunity against viral infections and effective vaccines. However, it is unclear how virus infection leads to TFH induction. We here show that dengue virus (DENV) infection of human dendritic cells (DCs) drives TFH formation via crosstalk of RIG-I-like receptor (RLR) RIG-I and MDA5 with type I Interferon (IFN) signaling. DENV infection leads to RLR-dependent IKKε activation, which phosphorylates IFNα/β receptor-induced STAT1 to drive IL-27 production via the transcriptional complex ISGF3...
November 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/29106035/genetic-association-of-hla-drb1-multiple-polymorphisms-with-dermatomyositis-in-chinese-population
#17
J M Lin, Y B Zhang, Q L Peng, H B Yang, J L Shi, M L Gu, W M Zhao, G C Wang
Genetic variation in HLA plays an important role in the pathogenesis of dermatomyositis (DM). The aim of this study was to investigate the association of HLA class II with DM in China. Two hundred and twenty-four DM patients and 300 healthy controls were randomly enrolled at China-Japan Friendship Hospital. High-resolution typing of HLA-DRB1 alleles was performed by sequencing based typing. The HLA-DQA1 and HLA-DQB1 alleles were determined by polymerase chain reaction sequence-specific primers. The frequencies of HLA-DRB1*09:01 (28...
December 2017: HLA
https://www.readbyqxmd.com/read/29100298/assessment-of-anti-mda5-antibody-as-a-diagnostic-biomarker-in-patients-with-dermatomyositis-associated-interstitial-lung-disease-or-rapidly-progressive-interstitial-lung-disease
#18
Liubing Li, Qian Wang, Xiaoting Wen, Chenxi Liu, Chanyuan Wu, Funing Yang, Xiaofeng Zeng, Yongzhe Li
Anti-melanoma differentiation-associated protein 5 (MDA5) antibody have been found in dermatomyositis (DM)-associated interstitial lung disease (DM-ILD) and DM-associated rapidly progressive ILD (DM-RPILD). Due to the conflicting results regarding the association between anti-MDA5 antibody and DM-ILD or DM-RPILD and the diagnostic value of this antibody for DM-ILD and DM-RPILD, we performed this meta-analysis. A systematic search was performed to identify studies published to January 14, 2017. Sixteen publications with 491 DM with ILD versus 605 DM without ILD, as well as eighteen publications with 186 DM with RPILD and 790 DM without RPILD were included...
September 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/29093381/the-serum-ferritin-level-is-associated-with-the-treatment-responsivity-for-rapidly-progressive-interstitial-lung-disease-with-amyopathic-dermatomyositis-irrespective-of-the-anti-mda5-antibody-level
#19
Takeshi Osawa, Kozo Morimoto, Yuka Sasaki, Shuichi Matsuda, Kazunari Yamana, Ryozo Yano, Takashi Uchiyama, Hajime Goto
We report the case of a 61-year-old woman with rapidly progressive interstitial lung disease caused by clinically amyopathic dermatomyositis. Both the serum ferritin and anti-melanoma differentiation-associated gene 5 (MDA5) antibody levels were elevated at the time of admission. Despite intensive treatment with corticosteroids, immunosuppressants, immunoglobulins and polymyxin B direct hemoperfusion, the patient died 75 days after symptom onset. Over the course of treatment, the anti-MDA5 antibody level continually decreased, while the serum ferritin level increased, suggesting that sequential measurements of the serum ferritin level might be useful for evaluating the treatment responsivity, irrespective of the anti-MDA5 antibody level...
February 1, 2018: Internal Medicine
https://www.readbyqxmd.com/read/29065773/describing-and-expanding-the-clinical-phenotype-of-anti-mda5-associated-rapidly-progressive-interstitial-lung-disease-case-series-of-nine-canadian-patients-and-literature-review
#20
S Hoa, Y Troyanov, M J Fritzler, I N Targoff, S Chartrand, A M Mansour, E Rich, H Boudabbouz, J Bourré-Tessier, M Albert, J R Goulet, M Landry, J L Senécal
OBJECTIVE: To describe and expand the phenotype of anti-MDA5-associated rapidly progressive interstitial lung disease (MDA5-RPILD) in Canadian patients. METHOD: All proven cases of MDA5-RPILD hospitalized in the University of Montreal's affiliated centres from 2004 to 2015 were selected for inclusion. RESULTS: Of nine consecutive patients, RPILD was the presenting manifestation in seven, whereas two patients developed RPILD 2 years after the onset of arthritis and of chronic interstitial lung disease...
May 2018: Scandinavian Journal of Rheumatology
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