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Viral myocarditis

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https://www.readbyqxmd.com/read/27917835/coxsackievirus-b3-protease-3c-expression-purification-crystallization-and-preliminary-structural-insights
#1
Stavroula Fili, Alexandros Valmas, Magdalini Christopoulou, Maria Spiliopoulou, Nikos Nikolopoulos, Julie Lichière, Souzana Logotheti, Fotini Karavassili, Eleftheria Rosmaraki, Andrew Fitch, Jonathan Wright, Detlef Beckers, Thomas Degen, Gwilherm Nénert, Rolf Hilgenfeld, Nicolas Papageorgiou, Bruno Canard, Bruno Coutard, Irene Margiolaki
Viral proteases are proteolytic enzymes that orchestrate the assembly of viral components during the viral life cycle and proliferation. Here, the expression, purification, crystallization and preliminary X-ray diffraction analysis are presented of protease 3C, the main protease of an emerging enterovirus, coxsackievirus B3, that is responsible for many cases of viral myocarditis. Polycrystalline protein precipitates suitable for X-ray powder diffraction (XRPD) measurements were produced in the presence of 22-28%(w/v) PEG 4000, 0...
December 1, 2016: Acta Crystallographica. Section F, Structural Biology Communications
https://www.readbyqxmd.com/read/27889626/absence-of-kynurenine-3-monooxygenase-reduces-mortality-of-acute-viral-myocarditis-in-mice
#2
Hisako Kubo, Masato Hoshi, Akihiro Mouri, Chieko Tashita, Yasuko Yamamoto, Toshitaka Nabeshima, Kuniaki Saito
Infection of the encephalomyocarditis virus (EMCV) in mice is an established model for viral myocarditis. Previously, we have demonstrated that indoleamine 2,3-dioxygenase (IDO), an L-tryptophan - kynurenine pathway (KP) enzyme, affects acute viral myocarditis. However, the roles of KP metabolites in EMCV infection remain unclear. Kynurenine 3-monooxygenase (KMO) is one of the key regulatory enzymes, which metabolizes kynurenine to 3-hydroxykynurenine in the KP. Therefore, we examined the role of KMO in acute viral infection by comparing between KMO(-/-) mice and KMO(+/+) mice...
November 23, 2016: Immunology Letters
https://www.readbyqxmd.com/read/27886550/v%C3%AE-1-%C3%AE-%C3%AE-t-early-cardiac-infiltrated-innate-population-dominantly-producing-il-4-protect-mice-against-cvb3-myocarditis-by-modulating-ifn%C3%AE-t-response
#3
Fangfang Wan, Kepeng Yan, Dan Xu, Qian Qian, Hui Liu, Min Li, Wei Xu
Viral myocarditis (VMC) is an inflammation of the myocardium closely associated with Coxsackievirus B3 (CVB3) infection. Vγ1(+)γδT cells, one of early cardiac infiltrated innate population, were reported to protect CVB3 myocarditis while the precise mechanism not fully addressed. To explore cytokine profiles and kinetics of Vγ1(+)γδT and mechanism of protection against VMC, flow cytometry was conducted on cardiac Vγ1 cells in C57BL/6 mice following CVB3 infection. The level of cardiac inflammation, transthoracic echocardiography and viral replication were evaluated after monoclonal antibody depletion of Vγ1γδT...
November 22, 2016: Molecular Immunology
https://www.readbyqxmd.com/read/27884253/the-quest-for-new-approaches-in%C3%A2-myocarditis-and-inflammatory%C3%A2-cardiomyopathy
#4
REVIEW
Stephane Heymans, Urs Eriksson, Jukka Lehtonen, Leslie T Cooper
Myocarditis is a diverse group of heart-specific immune processes classified by clinical and histopathological manifestations. Up to 40% of dilated cardiomyopathy is associated with inflammation or viral infection. Recent experimental studies revealed complex regulatory roles for several microribonucleic acids and T-cell and macrophage subtypes. Although the prevalence of myocarditis remained stable between 1990 and 2013 at about 22 per 100,000 people, overall mortality from cardiomyopathy and myocarditis has decreased since 2005...
November 29, 2016: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/27881911/systematic-review-and-meta-analysis-of-randomized-controlled-trials-on-wenxin-keli
#5
REVIEW
Xiaoyi Wang, Ying Wang, Xiaoyuan Feng, Ying Lu, Yu Zhang, Wenwen Wang, Wentao Zhu
OBJECTIVE: The aim of the study was to evaluate the effectiveness, safety, and cost associated with Wenxin keli in the treatment of cardiovascular diseases based on meta-analysis. METHODS: The terms "Wenxin keli" and "Wenxin" were used as the search terms in the PubMed, ProQuest, Springer, the Cochrane Library, CNKI (China National Knowledge Infrastructure), VIP (Chinese Scientific Journals Database), and Wan fang electronic databases (from January 2000 to October 2015)...
2016: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/27878326/a-novel-72-kda-leukocyte-derived-osteoglycin-enhances-the-activation-of-toll-like-receptor-4-and-exacerbates-cardiac-inflammation-during-viral-myocarditis
#6
Marieke Rienks, Anna Papageorgiou, Kristiaan Wouters, Wouter Verhesen, Rick van Leeuwen, Paolo Carai, Georg Summer, Dirk Westermann, Stephane Heymans
BACKGROUND: Viral myocarditis can severely damage the myocardium through excessive infiltration of immune cells. Osteoglycin (OGN) is part of the small leucine-rich repeat proteoglycan (SLRP) family. SLRP's may affect inflammatory and fibrotic processes, but the implication of OGN in cardiac inflammation and the resulting injury upon viral myocarditis is unknown. METHODS AND RESULTS: This study uncovered a previously unidentified 72-kDa variant of OGN that is predominant in cardiac human and mouse samples of viral myocarditis...
November 23, 2016: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/27878274/regulatory-t-cells-exhibit-neuroprotective-effect-in-a-mouse-model-of-traumatic-brain-injury
#7
Yunhu Yu, Fang Cao, Qishan Ran, Xiaochuan Sun
Traumatic brain injury (TBI) is a major health and socioeconomic problem as it is associated with high rates of mortality and morbidity worldwide. Regulatory T cells (Tregs) have been reported to reduce inflammatory response in several diseases, including myasthenia gravis, viral myocarditis and cerebral infarction. The present study investigated the role of Tregs in mediating neuro‑protective effects in a mouse model of TBI. Initially, Treg levels were determined, and compared between the controlled cortical impact (CCI) model for moderate TBI and the sham group, by using flow cytometry and ELISA...
November 18, 2016: Molecular Medicine Reports
https://www.readbyqxmd.com/read/27871237/a-unique-association-of-arrhythmogenic-right-ventricular-dysplasia-and-acute-myocarditis-as-assessed-by-cardiac-mri-a-case-report
#8
Andrea Ponsiglione, Marta Puglia, Carmine Morisco, Luigi Barbuto, Antonio Rapacciuolo, Mario Santoro, Letizia Spinelli, Bruno Trimarco, Alberto Cuocolo, Massimo Imbriaco
BACKGROUND: Arrhythmogenic right ventricular dysplasia (ARVD), is a genetic disorder of the heart, which mainly involves the right ventricle. It is characterized by hypokinetic areas at the free wall of the right ventricle (RV) or both ventricles, where myocardium is replaced by fibrous or fatty tissue. ARVD is an important cause of ventricular arrhythmias in children and young adults. Although the transmission of the disease is based on hereditary, in young adults it may not show any symptoms...
November 21, 2016: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/27866869/clinical-characteristics-and-outcomes-of-yemeni-patients-with-acute-heart-failure-aged-50years-or-younger-data-from-gulf-acute-heart-failure-registry-gulf-care
#9
A-Nasser Munibari, Ahmed Al-Motarreb, Nora Al-Sagheer, Hana Abu Hadi, Ali Othman, Nawar Al-Wather, Abdu Hamoud, Mutae Alawlagy, Salem Almehdar, Abdulkarim Alhammadi, Mohammed Almogayed, Giorgio Caretta, Anees Al Jabri, Luciano Agati
AIMS: There is a shortage of data about acute heart failure (AHF) in the young, including its underlying causes, clinical presentation and outcomes. We aim to describe clinical characteristics, causes and outcomes of AHF in Yemeni patients aged 50years or younger. METHODS AND RESULTS: we evaluated Yemeni patients with AHF enrolled in Gulf CARE registry. Patients were divided into two groups: young patients (≤50years) and older patients (>50years). A total of 1536 patients with AHF were enrolled, of whom 635 (41...
November 9, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/27863269/mortality-length-of-stay-bloodstream-and-respiratory-viral-infections-in-a-pediatric-intensive-care-unit
#10
Kam Lun Hon, Man Ping Luk, Wing Ming Fung, Cho Ying Li, Hiu Lee Yeung, Pui Kwun Liu, Shun Li, Kathy Yin Ching Tsang, Chi Kong Li, Paul Kay Sheung Chan, Kam Lau Cheung, Ting Fan Leung, Pei Lin Koh
OBJECTIVES: We investigated whether diagnostic categories and presence of infections were associated with increased mortality or length of stay (LOS) in patients admitted to a pediatric intensive care unit (PICU). METHODS: A retrospective study of all PICU admissions between October 2002 and April 2016 was performed. Oncologic vs nononcologic, trauma/injuries vs nontraumatic, infectious (gram-positive, gram-negative, fungal bloodstream infections, common respiratory viruses) vs noninfectious diagnoses were evaluated for survival and LOS...
September 30, 2016: Journal of Critical Care
https://www.readbyqxmd.com/read/27858465/established-and-novel-treatment-options-in-acute-myocarditis-with-or-without-heart-failure
#11
George Lazaros, Evangelos Oikonomou, Dimitris Tousoulis
Acute myocarditis is a disorder characterized by an unpredictable clinical course which ranges from asymptomatic, incidentally discovered forms, to cases with fulminant course and adverse outcome. The most challenging issues in the context of acute myocarditis are the appearance of difficult to treat heart failure in the acute phase and the potential progression in the long-term to dilated cardiomyopathy. Areas covered: With respect to available treatment options in acute myocarditis, in the absence of specific guidelines, management is supportive and overall empirical, especially for the oligo- or asymptomatic patients with preserved ejection fraction...
November 23, 2016: Expert Review of Cardiovascular Therapy
https://www.readbyqxmd.com/read/27855053/-effect-of-immune-therapy-in-the-prognosis-of-viral-myocarditis-in-pediatric-patients
#12
Horacio Márquez-González, Diana López-Gallegos, Alicia María Dolores González-Espinosa, Jonathan Omar Zamudio-López, Lucelli Yáñez-Gutiérrez
BACKGROUND: Myocarditis is the inflammation of the myocardial tissue, primarily caused by viral infection. Dilated cardiomyopathy (MD) is the most serious complication. Immunomodulatory therapy is not validated in these patients; however, it appears to offer benefits in the prognosis of this disease. The aim of this work was to determine the prognosis of immunomodulatory therapy in the development of MD in pediatric patients with viral myocarditis effect. METHODS: A retrospective cohort of patients between 4 and 17 years diagnosed with viral myocarditis was integrated...
2016: Revista Médica del Instituto Mexicano del Seguro Social
https://www.readbyqxmd.com/read/27847478/the-protective-effects-of-ivabradine-in-preventing-progression-from-viral-myocarditis-to-dilated-cardiomyopathy
#13
Li Yue-Chun, Chen Guang-Yi, Ge Li-Sha, Xing Chao, Tian Xinqiao, Lin Cong, Dai Xiao-Ya, Yang Xiangjun
To study the beneficial effects of ivabradine in dilated cardiomyopathy (DCM) mice, which evolved from coxsackievirus B3-induced chronic viral myocarditis. Four-to-five-week-old male balb/c mice were inoculated intraperitoneally with coxsackievirus B3 (Strain Nancy) on days 1, 14, and 28. The day of the first virus inoculation was defined as day 1. Thirty-five days later, the surviving chronic viral myocarditis mice were divided randomly into two groups, a treatment group and an untreated group. Ivabradine was administered by gavage for 30 consecutive days in the treatment group, and the untreated group was administered normal saline...
2016: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/27835942/detection-of-a-novel-circovirus-pcv3-in-pigs-with-cardiac-and-multi-systemic-inflammation
#14
Tung Gia Phan, Federico Giannitti, Stephanie Rossow, Douglas Marthaler, Todd Knutson, Linlin Li, Xutao Deng, Talita Resende, Fabio Vannucci, Eric Delwart
BACKGROUND: Porcine circovirus 2 causes different clinical syndromes resulting in a significant economic loss in the pork industry. Three pigs with unexplained cardiac and multi-organ inflammation that tested negative for PCV2 and other known porcine pathogens were further analyzed. METHODS: Histology was used to identify microscopic lesions in multiple tissues. Metagenomics was used to detect viral sequences in tissue homogenates. In situ hybridization was used to detect viral RNA expression in cardiac tissue...
November 11, 2016: Virology Journal
https://www.readbyqxmd.com/read/27793118/a-case-of-epstein-barr-virus-associated-hemophagocytic-lymphohistiocytosis-with-severe-cardiac-complications
#15
Yoshiki Kawamura, Hiroki Miura, Yuji Matsumoto, Hidetoshi Uchida, Kazuko Kudo, Tadayoshi Hata, Yoshinori Ito, Hiroshi Kimura, Tetsushi Yoshikawa
BACKGROUND: Hemophagocytic lymphohistiocytosis (HLH) is a life threatening hematological disorder associated with severe systemic inflammation caused by an uncontrolled and ineffective immune response resulting in cytokine storm. Epstein-Barr virus (EBV) is the most common infectious agent in patients with the viral-associated HLH. Limited numbers of cases with cardiac complication have been demonstrated in other viral-associated HLH patients. Herein, we report a pediatric case of severe EBV-associated HLH with cardiac complications...
October 28, 2016: BMC Pediatrics
https://www.readbyqxmd.com/read/27790717/in-utero-coxsackievirus-b4-infection-of-the-mouse-thymus
#16
Hela Jaïdane, Aymen Halouani, Habib Jmii, Firas Elmastour, Saïda Abdelkefi, Gwennaëlle Bodart, Hélène Michaux, Tahar Chakroun, Famara Sane, Moncef Mokni, Vincent Geenen, Didier Hober, Mahjoub Aouni
Type B Coxsackievirus (CV-B) infections are frequently involved in the triggering of several autoimmune diseases such as myocarditis, dilated cardiomyopathy, pericarditis, pancreatitis, type 1 diabetes, encephalitis, thyroiditis, or Sjögren's syndrome. Serological and virological evidence suggests that maternal infections during pregnancy can play a role in the appearance of these diseases in offspring. The current study aims to explore the effect of an in utero CV-B infection on the fetal thymus, the central site for programming immunological self-tolerance...
October 28, 2016: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/27773751/soluble-coxsackie-and-adenovirus-receptor-scar-fc-a-highly-efficient-compound-against-laboratory-and-clinical-strains-of-coxsackie-b-virus
#17
Sandra Pinkert, Babette Dieringer, Sabine Diedrich, Heinz Zeichhardt, Jens Kurreck, Henry Fechner
Coxsackie-B-viruses (CVB) cause a wide variety of diseases, ranging from mild syndromes to life-threatening conditions such as pancreatitis, myocarditis, meningitis and encephalitis. Especially newborns and young infants develop severe diseases and long-term sequelae may occur among survivors. Due to lack of specific antiviral therapy the current treatment of CVB infection is limited to symptomatic treatment. Here we analyzed the antiviral activity of a soluble receptor fusion protein, containing the extracellular part of the coxsackievirus and adenovirus receptor (CAR) fused to the constant domain of the human IgG - sCAR-Fc - against laboratory and clinical CVB strains...
October 20, 2016: Antiviral Research
https://www.readbyqxmd.com/read/27766098/il-9-inhibits-viral-replication-in-coxsackievirus-b3-induced-myocarditis
#18
Miao Yu, Qi Long, Huan-Huan Li, Wei Liang, Yu-Hua Liao, Jing Yuan, Xiang Cheng
Myocardial injuries in viral myocarditis (VMC) are caused by viral infection and related autoimmune disorders. Recent studies suggest that IL-9 mediated both antimicrobial immune and autoimmune responses in addition to allergic diseases. However, the role of IL-9 in viral infection and VMC remains controversial and uncertain. In this study, we infected Balb/c mice with Coxsackievirus B3 (CVB3), and found that IL-9 was enriched in the blood and hearts of VMC mice on days 5 and 7 after virus infection. Most of IL-9 was secreted by CD8(+) T cells on day 5 and CD4(+) T cells on day 7 in the myocardium...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27753702/green-tea-polyphenol-epigallocatechin-3-gallate-alleviated-coxsackievirus-b3-induced-myocarditis-via-inhibiting-viral-replication-but-not-through-inhibiting-inflammatory-responses
#19
Xiran He, Bo Gao, Lei Zhou, Sidong Xiong
Viral myocarditis, which is mainly caused by coxsackievirus B3 (CVB3), affects about 5%-20% of the world population and still lacks efficient treatments. Green tea, a tonic and healthful beverage that was originated in ancient China, has been receiving considerable attention for its protective effect on cardiovascular diseases in recent years. In present investigation, we aimed to explore the effect of Green tea polyphenol epigallocatechin-3-gallate (EGCG) on CVB3-induced myocarditis and its underlying mechanism...
October 6, 2016: Journal of Cardiovascular Pharmacology
https://www.readbyqxmd.com/read/27750147/synthesis-and-evaluation-of-halogenated-12n-sulfonyl-matrinic-butanes-as-potential-anti-coxsackievirus-agents
#20
Xin-Yue Cheng, Yu-Huan Li, Sheng Tang, Xin Zhang, Yan-Xiang Wang, Sheng-Gang Wang, Jian-Dong Jiang, Ying-Hong Li, Dan-Qing Song
Twenty-eight new 12N-benzenesulfonyl matrinic butane and halogenated 12N-sulfonyl matrinic butane/ethane derivatives were designed, synthesized and evaluated for their anti-coxsakievirus activities against CVB3 taking compound 1 as the lead. SAR analysis indicated the introduction of a fluoro atom on the 1'-position might be helpful for keeping potency. Among them, compound 8a exhibited potential activities against all CVBs with IC50 ranging from 0.69 to 5.14 μM, suggesting a broad-spectrum anti-coxsackievirus B feature...
September 30, 2016: European Journal of Medicinal Chemistry
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