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Infectious Myositis

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Analysis of myositis autoantibodies in Chinese patients with cancer-associated myositis.

Liubing Li, Chenxi Liu, Qian Wang, Chanyuan Wu, Yanfang Zhang, Linlin Cheng, Xiaoting Wen, Xiaofeng Zeng, Fengchun Zhang, Yongzhe Li,

BACKGROUND:Cancer-associated myositis (CAM) has poor prognosis and causes higher mortality. In general, myositis-specific autoantibodies (MSAs) and myositis-associated autoantibodies (MAAs) have been shown to be useful biomarkers for its diagnosis. METHODS:In the present study, focus was given in assessing the presence, prevalence, and diagnostic values of myositis autoantibodies in Chinese patients ... Read more >>

J. Clin. Lab. Anal. (Journal of clinical laboratory analysis)
[2020, :e23307]

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The spectrum of idiopathic inflammatory myopathies in South Africa.

Keith J Chinniah, Girish M Mody,

INTRODUCTION:There are many reports on idiopathic inflammatory myopathies (IIM) but little information from sub-Saharan Africa. We conducted a retrospective study of IIM in a multi-ethnic cohort seen at a single centre in Durban, South Africa. METHOD:The study included patients who fulfilled the Bohan and Peter or European League Against Rheumatism/American ... Read more >>

Clin. Rheumatol. (Clinical rheumatology)
[2020, :]

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Myositis associated anti-NT5C1A autoantibody in clinical practice

Chiseko Ikenaga, Andrew Findlay, Namita Goyal, Sarah Robinson, Jonathan Cauchi, Yessar Hussain, Leo Wang, Joshua Kershen, Brent Beson, Michael Wallendorf, Robert Bucelli, Tahseen Mozaffar, Alan Pestronk, Conrad Weihl,

Objective: To define the diagnostic utility and clinicopathologic features correlating with anti- cytosolic 5′-nucleotidase 1A (NT5C1A) antibody positivity in idiopathic inflammatory myopathies (IIMs). Methods: 4987 patients had anti-NT5C1A status clinically tested between 2014 and 2019 in the Washington University neuromuscular clinical laboratory. Using clinicopathologic information available for 630 of ... Read more >>

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High throughput screening to identify inhibitors of the type I interferon – major histocompatibility complex class I pathway in skeletal muscle

Travis Kinder, Patricia Dranchak, James Inglese,

Abstract Immunosuppressants used to treat autoimmunity are often not curative and have many side effects. Our purpose was to identify therapeutics for autoimmunity of the skeletal muscle termed idiopathic inflammatory myopathies (myositis). Recent evidence shows the pro-inflammatory type I interferons (IFN) and a down-stream product major histocompatibility complex (MHC) class ... Read more >>

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Interleukin-33/suppression of tumorigenicity 2 (IL-33/ST2) axis in idiopathic inflammatory myopathies and its association with laboratory and clinical parameters: a pilot study.

Aleksandra Opinc, Joanna Sarnik, Olga Brzezińska, Marcin Makowski, Anna Lewandowska-Polak, Joanna Makowska,

Idiopathic inflammatory myopathies (IIM) are rare connective tissue diseases, which can lead to internal organ involvement. IL-33/ST2 pathway is involved in the pathogenesis of numerous diseases including autoimmune disorders. IL-33 fulfils cardioprotective function, while soluble ST2 (sST2) is a decoy receptor that reduces protective impact of IL-33. The aim of ... Read more >>

Rheumatol. Int. (Rheumatology international)
[2020, :]

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Calcinosis biomarkers in and Juvenile Dermatomyositis.

Melody P Chung, Carrie Richardson, David Kirakossian, Amir B Orandi, Lesley A Saketkoo, Lisa G Rider, Adam Schiffenbauer, Carlos A von Mühlen, Lorinda Chung, , ,

Dermatomyositis (DM) is a rare idiopathic inflammatory myopathy characterized by muscle weakness and cutaneous manifestations in adults and children. Calcinosis, a complication of DM, is the abnormal deposition of insoluble calcium salts in tissues, including skin, subcutaneous tissue, tendons, fascia, and muscle. Calcinosis is more commonly seen in juvenile DM ... Read more >>

Autoimmun Rev (Autoimmunity reviews)
[2020, :102533]

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Myo-Inositol Transporter SLC5A3 Associates with Degenerative Changes and Inflammation in Sporadic Inclusion Body Myositis.

Boel De Paepe, Caroline Merckx, Jana Jarošová, Miryam Cannizzaro, Jan L De Bleecker,

Myo-inositol exerts many cellular functions, which include osmo-protection, membrane functioning, and secondary messaging. Its Na+/myo-inositol co-transporter SLC5A3 is expressed in muscle tissue and further accumulates in myositis. In this study we focused on the peculiar subgroup of sporadic inclusion body myositis (IBM), in which auto-inflammatory responses and degenerative changes co-exist. ... Read more >>

Biomolecules (Biomolecules)
[2020, 10(4):]

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Ultrasound can differentiate inclusion body myositis from disease mimics.

Kristofoor E Leeuwenberg, Nens van Alfen, Lisa Christopher-Stine, Julie J Paik, Eleni Tiniakou, Christopher Mecoli, Jonne Doorduin, Christiaan G J Saris, Jemima Albayda,

The diagnosis of inclusion body myositis (IBM) can be challenging, and its presentation can be confused with other forms of myositis or neuromuscular disorders. In this study we evaluate the ability of quantitative muscle ultrasound to differentiate between IBM and mimicking diseases. This article is protected by copyright. All rights ... Read more >>

Muscle Nerve (Muscle & nerve)
[2020, :]

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[A rare case of inclusion body myositis associated with anti-PM/Scl-75 antibodies].

Masayoshi Yamamoto, Koji Tsuzaki, Kumi Itani, Naoko Tachibana, Manabu Inoue, Toshiaki Hamano,

A 71-year-old man presented with progressive muscle weakness of the four limbs in November 2014. His symptoms had started from the left leg in 2008, resulting in frequent falls. In 2011, he became unable to stand up without a handrail due to weakness of the both legs. Physical examination showed ... Read more >>

Rinsho Shinkeigaku (Rinsho shinkeigaku = Clinical neurology)
[2020, :]

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TLR expression in peripheral monocyte subsets of patients with idiopathic inflammatory myopathies: association with clinical and immunological features.

Jiram Torres-Ruiz, Daniel Alberto Carrillo-Vazquez, Diana Marcela Padilla-Ortiz, Ricardo Vazquez-Rodriguez, Carlos Nuñez-Alvarez, Guillermo Juarez-Vega, Diana Gomez-Martin,

BACKGROUND:Monocytes and toll-like receptors (TLR) have been found in the inflammatory infiltrate of muscle biopsies in patients with idiopathic inflammatory myopathies (IIM), suggesting an important role of these cells in the pathogenesis of myositis. The monocyte subsets, their TLR expression in peripheral blood and their relationship with the clinical characteristics ... Read more >>

J Transl Med (Journal of translational medicine)
[2020, 18(1):125]

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[Dermatomyositis associated with rapid progression of pulmonary involvement].

David Kiefer, Ioana Andreica, Jürgen Braun,

In this case series we present three patients with autoimmune dermatomyositis or polymyositis with rapid-progressive interstitial pulmonary involvement. Despite intensive escalation of the immunosuppressive therapy the patients developed acute respiratory distress syndrome with lethal outcome only a few months after diagnosis. All three patients had increased myositis-specific or myositis-associated antibodies ... Read more >>

Dtsch. Med. Wochenschr. (Deutsche medizinische Wochenschrift (1946))
[2020, 145(6):394-398]

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Follow-up results of myositis patients treated with H. P. Acthar gel.

Didem Saygin, Chester V Oddis, Galina Marder, Siamak Moghadam-Kia, Preeya Nandkumar, Nicole Neiman, Sedin Dzanko, Diane Koontz, Rohit Aggarwal,

OBJECTIVES:Idiopathic inflammatory myopathies (IIM) are a group of autoimmune diseases characterized by proximal muscle weakness. H. P. Acthar gel [repository corticotropin injection (RCI)] is a formulation of adrenocorticotropic hormone and has been approved by Food and Drug Administration for use in IIM; however, literature is limited. In this study, we ... Read more >>

Rheumatology (Oxford) (Rheumatology (Oxford, England))
[2020, :]

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NET formation implicated in myositis.

Jessica McHugh,

Nat Rev Rheumatol (Nature reviews. Rheumatology)
[2020, 16(4):187]

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Docetaxel-Induced Myositis.

Joe Thomas, Arun Warrier, Nanda Kachare,

J Clin Rheumatol (Journal of clinical rheumatology : practical reports on rheumatic & musculoskeletal diseases)
[2020, 26(3):e62-e63]

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A Study On The Correlation Between Slit2/Robo1 Signaling Pathway Proteins And Polymyositis/Dermatomyositis.

Ke-Xia Chai, Yu-Qi Chen, Ling-Shuang Kong, Pei-Lin Fan, Xia Yuan, Jie Yang,

AIMS:To investigate the role of Slit2 and Robo1 during the vascular disease of Polymyositis (PM) / dermatomyositis (DM). BACKGROUND:PM and DM are non-suppurative inflammatory myopathies that mainly invade the skeletal muscles. OBJECTIVE:This study attempted to explore the specific mechanism of Slit2/Robo1 signaling pathway proteins during the vascular disease of PM/DM. ... Read more >>

Curr. Mol. Med. (Current molecular medicine)
[2020, :]

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Identification of a novel autoantibody against heat shock factor 1 in idiopathic inflammatory myopathy.

Ya-Mei Zhang, Lin Liang, Han-Bo Yang, Xiao-Ming Shu, Xin Lu, Guo-Chun Wang, Qing-Lin Peng,

OBJECTIVES:Myositis autoantibodies show great utility in the diagnosis and clinico-serological phenotyping of idiopathic inflammatory myopathy (IIM). We identified a novel autoantibody against heat shock factor 1 (HSF1) and further evaluated its disease specificity and clinical significance in IIM patients. METHODS:A human protein microarray was used to identify autoantibodies in myositis ... Read more >>

Clin. Exp. Rheumatol. (Clinical and experimental rheumatology)
[2020, :]

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Purulent infectious myositis (formerly tropical pyomyositis).

Miguel E Habeych, Terry Trinh, Nancy F Crum-Cianflone,

Purulent infectious myositis (PIM), formerly known as tropical pyomyositis, is a pyogenic infection of skeletal muscles. Staphylococcus aureus, a normal human skin inhabitant, is the main pathogen involved, but multiple other microorganisms have been implicated. Although usually a progressive febrile disease with pain in the affected muscle(s), severe, life-threatening forms ... Read more >>

J. Neurol. Sci. (Journal of the neurological sciences)
[2020, 413:116767]

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[Antisynthetase myopathy].

Shigeaki Suzuki,

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. Antisynthetase syndrome, characterized by myositis, interstitial lung disease, skin rash, arthropathy, and Raynaud phenomenon, is ... Read more >>

Rinsho Shinkeigaku (Rinsho shinkeigaku = Clinical neurology)
[2020, 60(3):175-180]

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Mitochondrial dysfunction underlying sporadic inclusion body myositis is ameliorated by the mitochondrial homing drug MA-5

Yoshitsugu Oikawa, Rumiko Izumi, Masashi Koide, Yoshihiro Hagiwara, Makoto Kanzaki, Naoki Suzuki, Koichi Kikuchi, Tetsuro Matsuhashi, Yukako Akiyama, Mariko Ichijo, Takafumi Toyohara, Takehiro Suzuki, Eikan Mishima, Yasutoshi Akiyama, Yoshiaki Ogata, Chitose Suzuki, Masashi Aoki, Eiji Itoi, Shigeo Kure, Ken-ichiro Hayashi, Takaaki Abe,

Abstract Sporadic inclusion body myositis (sIBM) is the most common idiopathic inflammatory myopathy, and several reports have suggested that mitochondrial abnormalities are involved in its etiology. We recruited 9 sIBM patients and found significant histological changes and an elevation of growth differential factor 15 (GDF15), a marker of mitochondrial disease, ... Read more >>

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Orbital compartment syndrome as the first manifestation of SLE.

Maria Colon, Lara El Khoury,

The occurrence of orbital compartment syndrome is a rare and unusual complication of systemic lupus erythematosus (SLE). Patients will present with symptoms of ocular pain and diplopia and visible signs of proptosis. The condition is considered an ophthalmological emergency because the myositis involving the ocular muscles can cause irrevocable damage ... Read more >>

Clin. Rheumatol. (Clinical rheumatology)
[2020, :]

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Response to: 'Immune-mediated necrotizing myopathies and interstitial lung disease are predominant characteristics in anti-Ku positive patients with idiopathic inflammatory myopathies' by Yang et al.

Lionel Spielmann, Benoit Nespola, Alain Meyer,

Ann. Rheum. Dis. (Annals of the rheumatic diseases)
[2020, :]

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Genetic heterogeneity of the Spy1336/R28-Spy1337 virulence axis in Streptococcus pyogenes and effect on gene transcript levels and pathogenesis.

Jesus M Eraso, Priyanka Kachroo, Randall J Olsen, Stephen B Beres, Luchang Zhu, Traci Badu, Sydney Shannon, Concepcion C Cantu, Matthew Ojeda Saavedra, Samantha L Kubiak, Adeline R Porter, Frank R DeLeo, James M Musser,

Streptococcus pyogenes is a strict human pathogen responsible for more than 700 million infections annually worldwide. Strains of serotype M28 S. pyogenes are typically among the five more abundant types causing invasive infections and pharyngitis in adults and children. Type M28 strains also have an unusual propensity to cause puerperal ... Read more >>

PLoS ONE (PloS one)
[2020, 15(3):e0229064]

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Predictive factors for sustained remission with stratification by myositis-specific autoantibodies in adult polymyositis/dermatomyositis.

Eri Watanabe, Takahisa Gono, Masataka Kuwana, Chihiro Terai,

OBJECTIVE:The aim of this study was to clarify predictive factors for sustained remission in adult patients with PM/DM, particularly focusing on stratification by myositis-specific autoantibodies (MSAs). METHODS:A total of 162 adult patients with PM/DM who were followed up for >1 year after diagnosis were retrospectively enrolled. MSAs were evaluated comprehensively ... Read more >>

Rheumatology (Oxford) (Rheumatology (Oxford, England))
[2020, 59(3):586-593]

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Paraspinal muscle involvement in pembrolizumab-associated myositis.

Yasunobu Nosaki, Shuko Mashimo, Maki Watanabe, Takamasa Yokoi, Yosuke Kobayashi, Katsushige Iwai,

Oxf Med Case Reports (Oxford medical case reports)
[2020, 2020(2):omaa003]

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Orbital Myositis: A Comprehensive Review and Reclassification.

Alan A McNab,

PURPOSE:Orbital myositis occurs in typical and atypical forms. This review summarizes and updates the current state of knowledge of all forms of inflammation affecting extraocular muscle, excluding thyroid-associated orbitopathy. METHODS:A comprehensive literature review of orbital myositis was performed. RESULTS:Orbital myositis typically occurs in an idiopathic acute form, with painful diplopia ... Read more >>

Ophthalmic Plast Reconstr Surg (Ophthalmic plastic and reconstructive surgery)
[2020, 36(2):109-117]

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