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https://www.readbyqxmd.com/read/28212305/epigenetic-landscape-during-coronavirus-infection
#1
Alexandra Schäfer, Ralph S Baric
Coronaviruses (CoV) comprise a large group of emerging human and animal pathogens, including the highly pathogenic severe acute respiratory syndrome coronavirus (SARS-CoV) and Middle East respiratory syndrome coronavirus (MERS-CoV) strains. The molecular mechanisms regulating emerging coronavirus pathogenesis are complex and include virus-host interactions associated with entry, replication, egress and innate immune control. Epigenetics research investigates the genetic and non-genetic factors that regulate phenotypic variation, usually caused by external and environmental factors that alter host expression patterns and performance without any change in the underlying genotype...
February 15, 2017: Pathogens
https://www.readbyqxmd.com/read/28203548/doxycycline-induces-mitophagy-and-suppresses-production-of-interferon-%C3%AE-in-ipec-j2-cells
#2
Yang Xing, Zhu Liqi, Lin Jian, Yu Qinghua, Yang Qian
Previous reports have demonstrated that the second-generation tetracycline derivative doxycycline (DOX) interrupts mitochondrial proteostasis and physiology, inhibits proliferation of many cell types, and induces apoptosis. However, the effects of DOX, which is widely used in porcine husbandry by feed, on the porcine intestinal epithelium are unclear. In this study, we demonstrated that DOX damaged mitochondrial morphology and induced the co-localization of mitochondria with autophagosomes, suggesting that DOX induces mitophagy in IPEC-J2 cells...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28202790/reactivity-of-anti-pedv-structural-protein-antibodies-to-porcine-enteric-coronaviruses-diagnostic-implications
#3
Luis Gabriel Gimenez-Lirola, Jianqiang Zhang, Jose Antonio Carrillo-Avila, Qi Chen, Ronaldo Magtoto, Korakrit Poonsuk, David H Baum, Pablo Piñeyro, Jeffrey Zimmerman
The development of porcine epidemic diarrhea virus (PEDV) antibody-based assays is important for detecting infected animals, confirming previous virus exposure, and monitoring sow herd immunity. However, the potential cross-reactivity among porcine coronaviruses is a major concern for the development of pathogen-specific assays. In this study, we used serum samples (n = 792) from pigs of precisely known infection status and a multiplex fluorescent microbead-based immunoassay and/or enzyme-linked immunoassay platform to characterize the antibody response against PEDV whole-virus (WV) particles and recombinant polypeptides derived from the four PEDV structural proteins, i...
February 15, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28193191/effective-inhibition-of-mers-cov-infection-by-resveratrol
#4
Shih-Chao Lin, Chi-Tang Ho, Wen-Ho Chuo, Shiming Li, Tony T Wang, Chi-Chen Lin
BACKGROUND: Middle East Respiratory Syndrome coronavirus (MERS-CoV) is an emerging viral pathogen that causes severe morbidity and mortality. Up to date, there is no approved or licensed vaccine or antiviral medicines can be used to treat MERS-CoV-infected patients. Here, we analyzed the antiviral activities of resveratrol, a natural compound found in grape seeds and skin and in red wine, against MERS-CoV infection. METHODS: We performed MTT and neutral red uptake assays to assess the survival rates of MERS-infected Vero E6 cells...
February 13, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28191658/interpatient-mutational-spectrum-of-human-coronavirus-oc43-revealed-by-illumina-sequencing
#5
Geoffrey J Gorse, Gira B Patel, Xiaofeng Fan
Human coronaviruses (HCoV) are RNA viruses that cause respiratory tract infections with viral replication of limited duration. The host and viral population heterogeneity could influence clinical phenotypes. Employing long RT-PCR with Illumina sequencing, we quantified the gene mutation load at 0.5% mutation frequency for the 4,529 bp-domain spanning the Spike gene (4,086 bp) of HCoV-OC43 in four upper respiratory clinical specimens obtained during acute illness. There were a total of 121 mutations for all four HCoV samples with the average number of mutations at 30...
February 12, 2017: Journal of Medical Virology
https://www.readbyqxmd.com/read/28191331/development-of-dual-taqman-based-one-step-rrt-pcr-assay-panel-for-rapid-and-accurate-diagnostic-test-of-mers-cov-a-novel-human-coronavirus-ahead-of-hajj-pilgrimage
#6
Mohammad Sadegh Hashemzadeh, Rahimeh Rasouli, Bentolhoda Zahraei, Morteza Izadi, Mahdi Tat, Seyed Hassan Saadat, Mohammad Najarasl, Behzad Khansari Nejad, Ruhollah Dorostkar
BACKGROUND: Coronaviruses (CoVs) are large ribonucleic acid (RNA) viruses causing primarily respiratory disease in humans. A novel human coronavirus, subsequently named middle east respiratory syndrome coronavirus (MERS-CoV), was first reported in Saudi Arabia in September of 2012. With increasing numbers of infections and deaths from MERS-CoV, development of a rapid and reliable kit was crucial to prevent further spread of MERS-CoV. OBJECTIVES: In this study, we present two real-time reverse-transcription polymerase chain reaction (rRT-PCR) assays for in-house rapid and sensitive diagnostic testing of MERS-CoV, detecting the regions upstream of the envelope gene (upE) and open reading frame (ORF) 1b, respectively, for initial screening and final confirmation of MERS-CoV infection, as recommended by the world health organization (WHO)...
November 2016: Iranian Red Crescent Medical Journal
https://www.readbyqxmd.com/read/28190504/seroprevalence-and-risk-factors-for-infection-with-equine-coronavirus-in-healthy-horses-in-the-usa
#7
L J Kooijman, K James, S M Mapes, M J P Theelen, N Pusterla
Equine coronavirus (ECoV) is considered an enteric pathogen of foals and has only recently been associated with infections in adult horses. Seroprevalence data is needed to better understand the epidemiology of ECoV in adult horses, evaluate diagnostic modalities and develop preventive measures. The objective of this study was to investigate the seroprevalence and selective risk factors for ECoV in 5247 healthy adult horses in the USA, using a recently established and validated IgG enzyme-linked immunosorbent assay...
February 2017: Veterinary Journal
https://www.readbyqxmd.com/read/28190501/middle-east-respiratory-syndrome-mers-coronavirus-and-dromedaries
#8
REVIEW
Ulrich Wernery, Susanna K P Lau, Patrick C Y Woo
Middle East Respiratory Syndrome (MERS) is a zoonotic viral disease that can be transmitted from dromedaries to human beings. More than 1500 cases of MERS have been reported in human beings to date. Although MERS has been associated with 30% case fatality in human beings, MERS coronavirus (MERS-CoV) infection in dromedaries is usually asymptomatic. In rare cases, dromedaries may develop mild respiratory signs. No MERS-CoV or antibodies against the virus have been detected in camelids other than dromedaries...
February 2017: Veterinary Journal
https://www.readbyqxmd.com/read/28182215/risk-factors-for-transmission-of-middle-east-respiratory-syndrome-coronavirus-infection-during-the-2015-outbreak-in-south-korea
#9
Seung Woo Kim, Jung Wan Park, Hee-Dong Jung, Jeong-Sun Yang, Yong-Shik Park, Changhwan Lee, Kyung Min Kim, Keon-Joo Lee, Donghyok Kwon, Young Joo Hur, BoYoul Choi, Moran Ki
No abstract text is available yet for this article.
February 9, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28177368/nursery-pig-growth-performance-and-tissue-accretion-modulation-due-to-porcine-epidemic-diarrhea-virus-or-porcine-deltacoronavirus-challenge
#10
S M Curry, K A Gibson, E R Burrough, K J Schwartz, K J Yoon, N K Gabler
Porcine epidemic diarrhea virus (PEDV) and porcine deltacoronavirus (PDCoV) are both members of the family which induce clinical signs of diarrhea, dehydration, and in some circumstances, mortality. Most research has been focused on isolation, genome sequencing, pathogenicity, and virulence of these viruses, but there is little information on long-term growth performance and tissue accretion of pigs inoculated with PEDV or PDCoV. Therefore, our objective was to determine the effect of PEDV or PDCoV infection on growth performance and tissue accretion over 42 d following inoculation...
January 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28174054/nidovirus-rna-polymerases-complex-enzymes-handling-exceptional-rna-genomes
#11
REVIEW
Clara C Posthuma, Aartjan J W Te Welthuis, Eric J Snijder
Coronaviruses and arteriviruses are distantly related human and animal pathogens that belong to the order Nidovirales. Nidoviruses are characterized by their polycistronic plus-stranded RNA genome, the production of subgenomic mRNAs and the conservation of a specific array of replicase domains, including key RNA-synthesizing enzymes. Coronaviruses (26-34 kilobases) have the largest known RNA genomes and their replication presumably requires a processive RNA-dependent RNA polymerase (RdRp) and enzymatic functions that suppress the consequences of the typically high error rate of viral RdRps...
February 4, 2017: Virus Research
https://www.readbyqxmd.com/read/28159163/epidemic-and-emerging-coronaviruses-severe-acute-respiratory-syndrome-and-middle-east-respiratory-syndrome
#12
REVIEW
David S Hui
Bats are the natural reservoirs of severe acute respiratory syndrome (SARS)-like coronaviruses (CoVs) and likely the reservoir of Middle East respiratory syndrome (MERS)-CoV. The clinical features of SARS-CoV infection and MERS-CoV infection are similar but MERS-CoV infection progresses to respiratory failure more rapidly. Although the estimated pandemic potential of MERS-CoV is lower than that of SARS-CoV, the case fatality rate of MERS is higher. The transmission route and the possibility of other intermediary animal sources remain uncertain among many sporadic primary cases...
March 2017: Clinics in Chest Medicine
https://www.readbyqxmd.com/read/28158346/virucidal-activity-of-who-recommended-formulations-against-enveloped-viruses-including-zika-ebola-and-emerging-coronaviruses
#13
Anindya Siddharta, Stephanie Pfaender, Nathalie Jane Vielle, Ronald Dijkman, Martina Friesland, Britta Becker, Jaewon Yang, Michael Engelmann, Daniel Todt, Marc P Windisch, Florian H Brill, Joerg Steinmann, Jochen Steinmann, Stephan Becker, Marco P Alves, Thomas Pietschmann, Markus Eickmann, Volker Thiel, Eike Steinmann
No abstract text is available yet for this article.
February 1, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28158275/early-endonuclease-mediated-evasion-of-rna-sensing-ensures-efficient-coronavirus-replication
#14
Eveline Kindler, Cristina Gil-Cruz, Julia Spanier, Yize Li, Jochen Wilhelm, Huib H Rabouw, Roland Züst, Mihyun Hwang, Philip V'kovski, Hanspeter Stalder, Sabrina Marti, Matthias Habjan, Luisa Cervantes-Barragan, Ruth Elliot, Nadja Karl, Christina Gaughan, Frank J M van Kuppeveld, Robert H Silverman, Markus Keller, Burkhard Ludewig, Cornelia C Bergmann, John Ziebuhr, Susan R Weiss, Ulrich Kalinke, Volker Thiel
Coronaviruses are of veterinary and medical importance and include highly pathogenic zoonotic viruses, such as SARS-CoV and MERS-CoV. They are known to efficiently evade early innate immune responses, manifesting in almost negligible expression of type-I interferons (IFN-I). This evasion strategy suggests an evolutionary conserved viral function that has evolved to prevent RNA-based sensing of infection in vertebrate hosts. Here we show that the coronavirus endonuclease (EndoU) activity is key to prevent early induction of double-stranded RNA (dsRNA) host cell responses...
February 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28153558/middle-east-respiratory-syndrome-coronavirus-mers-cov-outbreak-in-south-korea-2015-epidemiology-characteristics-and-public-health-implications
#15
K H Kim, T E Tandi, J W Choi, J M Moon, M S Kim
BACKGROUND: Since the first case of Middle East respiratory syndrome coronavirus (MERS-CoV) in South Korea was reported on 20(th) May 2015, there have been 186 confirmed cases, 38 deaths and 16,752 suspected cases. Previously published research on South Korea's MERS outbreak was limited to the early stages, when few data were available. Now that the outbreak has ended, albeit unofficially, a more comprehensive review is appropriate. METHODS: Data were obtained through the MERS portal by the Ministry for Health and Welfare (MOHW) and Korea Centres for Disease Control and Prevention, press releases by MOHW, and reports by the MERS Policy Committee of the Korean Medical Association...
February 2017: Journal of Hospital Infection
https://www.readbyqxmd.com/read/28149861/an-effective-dna-vaccine-platform-for-middle-east-respiratory-syndrome-coronavirus
#16
EDITORIAL
Adam S Cockrell, Ralph S Baric
No abstract text is available yet for this article.
December 2016: Annals of Translational Medicine
https://www.readbyqxmd.com/read/28149491/evidence-of-human-coroanvirus-229e-in-patients-with-respiratory-infection-iran-2015-the-first-report
#17
Ali Madhi, Arash Ghalyanchilangeroudi, Mohammad Soleimani
BACKGROUND AND OBJECTIVES: Human coronaviruses (HCoVs) are one of the main causes of upper respiratory tract infections in humans. While more often responsible for mild illness, they have been associated with illnesses that require hospitalization. MATERIALS AND METHODS: 270 Samples from patients hospitalized with the respiratory infection during the autumn season of 2015 were evaluated for the presence of four HCoVs (OC43, 229E, HUK1, and NL63) using an optimized SYBR green RT-PCR assay...
October 2016: Iranian Journal of Microbiology
https://www.readbyqxmd.com/read/28148787/sars-coronavirus-nucleocapsid-inhibits-type-i-interferon-production-by-interfering-with-trim25-mediated-rig-i-ubiquitination
#18
Yong Hu, Wei Li, Ting Gao, Yan Cui, Yanwen Jin, Ping Li, Qingjun Ma, Xuan Liu, Cheng Cao
: Severe acute respiratory syndrome (SARS) is a respiratory disease caused by a coronavirus (SARS-CoV) that is characterized by atypical pneumonia. The nucleocapsid protein (N protein) of SARS-CoV plays an important role in inhibition of type I interferon (IFN) production via an unknown mechanism. In this study, the SARS-CoV N protein was found to bind to the SPRY domain of the tripartite motif protein 25 (TRIM25) E3 ubiquitin ligase, thereby interfering with the association between TRIM25 and retinoic acid-inducible gene I (RIG-I) and inhibiting TRIM25-mediated RIG-I ubiquitination and activation...
February 1, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28148786/neurovirulent-murine-coronavirus-jhm-sd-uses-cellular-zinc-metalloproteases-for-virus-entry-and-cell-cell-fusion
#19
Judith M Phillips, Tom Gallagher, Susan R Weiss
: The coronavirus S protein requires cleavage by host cell proteases to mediate virus-cell and cell-cell fusion. Many strains of the murine coronavirus mouse hepatitis virus (MHV) have distinct, S-dependent organ and tissue tropisms despite using a common receptor, suggesting that they employ different cellular proteases for fusion. In support of this hypothesis, we found that inhibition of endosomal acidification only modestly decreased entry and overexpression of the cell surface protease TMPRSS2 greatly enhanced entry of the highly neurovirulent MHV strain JHM...
February 1, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28143984/in-situ-tagged-nsp15-reveals-interactions-with-coronavirus-replication-transcription-complex-associated-proteins
#20
Jeremiah Athmer, Anthony R Fehr, Matthew Grunewald, Everett Clinton Smith, Mark R Denison, Stanley Perlman
: Coronavirus (CoV) replication and transcription are carried out in close proximity to restructured endoplasmic reticulum (ER) membranes in replication/transcription complexes (RTC). Many of the CoV nonstructural proteins (nsps) are required for RTC function; however, not all of their functions are known. nsp15 contains an endoribonuclease domain that is conserved in the CoV family. While the enzymatic activity and crystal structure of nsp15 are well defined, its role in replication remains elusive...
January 31, 2017: MBio
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