myocarditis/protease

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Coagulation, protease-activated receptors, and viral myocarditis.

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The coagulation protease cascade plays an essential role in hemostasis. In addition, a clot contributes to host defense by limiting the spread of pathogens. Coagulation proteases induce intracellular signaling by cleavage of cell surface receptors called protease-activated receptors (PARs). These

Homology modeling, docking, molecular dynamics simulation, and structural analyses of coxsakievirus B3 2A protease: an enzyme involved in the pathogenesis of inflammatory myocarditis.

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2A protease of the pathogenic coxsackievirus B3 is key to the pathogenesis of inflammatory myocarditis and, therefore, an attractive drug target. However lack of a crystal structure impedes design of inhibitors. Here we predict 3D structure of CVB3 2A(pro) based on sequence comparison and homology

Antiviral activity of coxsackievirus B3 3C protease inhibitor in experimental murine myocarditis.

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BACKGROUND We investigated the efficacy of a 3C protease inhibitor (3CPI) in a murine coxsackievirus B3 (CVB3) myocarditis model. CVB3 is a primary cause of viral myocarditis. The CVB3 genome encodes a single polyprotein that undergoes a series of proteolytic events to produce several viral

The Role of Protease-Activated Receptors for the Development of Myocarditis: Possible Therapeutic Implications.

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Protease-activated receptors (PARs) are a unique group of four G-protein coupled receptors. They are widely expressed within the cardiovascular system and the heart. PARs are activated via cleavage by serine proteases. In vitro and in vivo studies showed that the activation of PAR1 and PAR2 plays a

Soluble coxsackievirus B3 3C protease inhibitor prevents cardiomyopathy in an experimental chronic myocarditis murine model.

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BACKGROUND Coxsackievirus B3 (CVB3) is a common cause of myocarditis and dilated cardiomyopathy. CVB3 3C protease (3CP) cleaves the viral polyprotein during replication. We tested whether a water soluble 3CP inhibitor (3CPI) had antiviral effects in a chronic myocarditis model. METHODS Chronic

Protease-activated receptor-2 regulates the innate immune response to viral infection in a coxsackievirus B3-induced myocarditis.

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OBJECTIVE This study sought to evaluate the role of protease-activated receptor-2 (PAR2) in coxsackievirus B3 (CVB3)-induced myocarditis. BACKGROUND An infection with CVB3 leads to myocarditis. PAR2 modulates the innate immune response. Toll-like receptor-3 (TLR3) is crucial for the innate immune

Calpain regulates CVB3 induced viral myocarditis by promoting autophagic flux upon infection.

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Calpains are calcium-activated neutral cysteine proteases. The dysregulation of calpain activity has been found to be related to cardiovascular diseases, for which calpain inhibition is used as a treatment. Viral myocarditis (VMC) is primarily caused by Coxsackievirus group B3 virus infection

Up-regulation of ectopic trypsins in the myocardium by influenza A virus infection triggers acute myocarditis.

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OBJECTIVE Influenza A virus (IAV) infection markedly up-regulates ectopic trypsins in various organs, viral envelope glycoprotein processing proteases, which are pre-requisites for virus entry and multiplication. We investigated the pathological roles of trypsin up-regulation in the progression of

Unsolved medical issues and new targets for further research in viral myocarditis and dilated cardiomyopathy.

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Meaningful advances have been made in understanding the mechanisms that contribute to dilated cardiomyopathy and myocarditis. Our data confirmed the hypothesis that there is an interaction of genetic predisposition and acquired factors, in that both can affect the dystrophin-glycoprotein complex. We

Coxsackievirus B3 protease 3C: expression, purification, crystallization and preliminary structural insights.

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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

Protective immune response in mice vaccinated with a recombinant adenovirus containing capsid precursor polypeptide P1, nonstructural protein 2A and 3C protease genes (P12A3C) of encephalomyocarditis virus.

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Encephalomyocarditis virus (EMCV) infection can cause acute myocarditis and sudden death in pre-weaned piglets as well as severe reproductive failure in sows. In this study, two recombinant adenoviruses containing capsid precursor polypeptide P1 alone (Ad-P1) and P1 plus nonstructural protein 2A and

In vivo detection of apoptotic cell death: a necessary measurement for evaluating therapy for myocarditis, ischemia, and heart failure.

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If life is to continue, cells that have completed their useful function(s) must die in a timely manner. Apoptosis, programmed cell death, is a natural, orderly, energy-dependent process that causes cells to die without inducing an inflammatory response. In the heart, apoptosis plays pivotal roles in

Roles of PAR1 and PAR2 in viral myocarditis.

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Viral myocarditis is estimated to cause ~20% of sudden death in people under the age of 40. A variety of viruses have been found to cause myocarditis including coxsackievirus B3 (CVB3). Many studies have been performed with CVB3 because there is a mouse model of CVB3-induced myocarditis. Studies

Enhanced enteroviral infectivity via viral protease-mediated cleavage of Grb2-associated binder 1.

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Coxsackievirus B3 (CVB3), an important human causative pathogen for viral myocarditis, pancreatitis, and meningitis, has evolved different strategies to manipulate the host signaling machinery to ensure successful viral infection. We previously revealed a crucial role for the ERK1/2 signaling

Selective disruption of MMP-2 gene exacerbates myocardial inflammation and dysfunction in mice with cytokine-induced cardiomyopathy.

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Tumor necrosis factor-alpha (TNF-alpha) plays a pathophysiological role in the development and progression of heart failure. Matrix metalloproteinase (MMP)-2 is involved in extracellular matrix remodeling. Recent evidence suggests a protective role for this protease against tissue inflammation.

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