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https://www.readbyqxmd.com/read/29162711/expression-and-cleavage-of-middle-east-respiratory-syndrome-coronavirus-nsp3-4-polyprotein-induce-the-formation-of-double-membrane-vesicles-that-mimic-those-associated-with-coronaviral-rna-replication
#1
Diede Oudshoorn, Kevin Rijs, Ronald W A L Limpens, Kevin Groen, Abraham J Koster, Eric J Snijder, Marjolein Kikkert, Montserrat Bárcena
Betacoronaviruses, such as Middle East respiratory syndrome coronavirus (MERS-CoV), are important pathogens causing potentially lethal infections in humans and animals. Coronavirus RNA synthesis is thought to be associated with replication organelles (ROs) consisting of modified endoplasmic reticulum (ER) membranes. These are transformed into double-membrane vesicles (DMVs) containing viral double-stranded RNA and into other membranous elements such as convoluted membranes, together forming a reticulovesicular network...
November 21, 2017: MBio
https://www.readbyqxmd.com/read/29161116/corticosteroid-therapy-for-critically-ill-patients-with-the-middle-east-respiratory-syndrome
#2
Yaseen M Arabi, Yasser Mandourah, Fahad Al-Hameed, Anees A Sindi, Ghaleb A Al Mekhlafi, Mohamed A Hussein, Jesna Jose, Ruxandra Pinto, Awad Al-Omari, Ayman Kharaba, Abdullah Almotairi, Kasim Al Khatib, Basem Alraddadi, Sarah Shalhoub, Ahmed Abdulmomen, Ismael Qushmaq, Ahmed Mady, Othman Solaiman, Abdulsalam M Al-Aithan, Rajaa Al-Raddadi, Ahmed Ragab, Hanan H Balkhy, Abdulrahman Al Harthy, Ahmad M Deeb, Hanan Al Mutairi, Abdulaziz Al-Dawood, Laura Merson, Frederick G Hayden, Robert A Fowler
RATIONALE: Corticosteroid therapy is commonly used among critically ill patients with the Middle East Respiratory Syndrome (MERS), but its impact on outcomes is uncertain. Analyses of observational studies often do not account for patients' clinical condition at the time of corticosteroid therapy initiation. OBJECTIVES: To investigate the association of corticosteroid therapy on mortality and on MERS coronavirus RNA clearance in critically ill patients with MERS...
November 21, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29159596/human-monoclonal-antibodies-as-candidate-therapeutics-against-emerging-viruses
#3
REVIEW
Yujia Jin, Cheng Lei, Dan Hu, Dimiter S Dimitrov, Tianlei Ying
The emergence of new pathogens, such as severe acute respiratory syndrome coronavirus (SARS-CoV), Middle East respiratory syndrome coronavirus (MERS-CoV), and Ebola virus, poses serious challenges to global public health and highlights the urgent need for novel antiviral approaches. Monoclonal antibodies (mAbs) have been successfully used to treat various diseases, particularly cancer and immunological disorders. Antigen-specific mAbs have been isolated using several different approaches, including hybridoma, transgenic mice, phage display, yeast display, and single B-cell isolation...
November 20, 2017: Frontiers of Medicine
https://www.readbyqxmd.com/read/29155867/spectrum-of-pathogen-and-model-specific-histopathologies-in-mouse-models-of-acute-pneumonia
#4
Kristina Dietert, Birgitt Gutbier, Sandra M Wienhold, Katrin Reppe, Xiaohui Jiang, Ling Yao, Catherine Chaput, Jan Naujoks, Markus Brack, Alexandra Kupke, Christin Peteranderl, Stephan Becker, Carolin von Lachner, Nelli Baal, Hortense Slevogt, Andreas C Hocke, Martin Witzenrath, Bastian Opitz, Susanne Herold, Holger Hackstein, Leif E Sander, Norbert Suttorp, Achim D Gruber
Pneumonia may be caused by a wide range of pathogens and is considered the most common infectious cause of death in humans. Murine acute lung infection models mirror human pathologies in many aspects and contribute to our understanding of the disease and the development of novel treatment strategies. Despite progress in other fields of tissue imaging, histopathology remains the most conclusive and practical read out tool for the descriptive and semiquantitative evaluation of mouse pneumonia and therapeutic interventions...
2017: PloS One
https://www.readbyqxmd.com/read/29155659/us-federal-travel-restrictions-for-persons-with-higher-risk-exposures-to-communicable-diseases-of-public-health-concern
#5
Laura A Vonnahme, M Robynne Jungerman, Reena K Gulati, Petra Illig, Francisco Alvarado-Ramy
Published guidance recommends controlled movement for persons with higher-risk exposures (HREs) to communicable diseases of public health concern; US federal public health travel restrictions (PHTRs) might be implemented to enforce these measures. We describe persons eligible for and placed on PHTRs because of HREs during 2014-2016. There were 160 persons placed on PHTRs: 142 (89%) involved exposure to Ebola virus, 16 (10%) to Lassa fever virus, and 2 (1%) to Middle East respiratory syndrome coronavirus. Most (90%) HREs were related to an epidemic...
December 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/29155041/epidemiological-and-clinical-characteristics-of-coronavirus-and-bocavirus-respiratory-infections-after-allogeneic-stem-cell-transplantation-a-prospective-single-center-study
#6
José Luis Piñana, Silvia Madrid, Ariadna Pérez, Juan Carlos Hernández-Boluda, Estela Giménez, María José Terol, Marisa Calabuig, David Navarro, Carlos Solano
Epidemiological data about coronaviruses (CoVs) and human bocavirus (HBoV) in the setting of allogeneic hematopoietic stem cell transplantation (allo-HSCT) is scarce. METHODS: We conducted a prospective longitudinal study on respiratory viral infections (RVIs) in allo-HSCT recipients having respiratory symptoms from December 2013 until June 2016. Respiratory virus in upper and/or lower respiratory tract (URT and LRT) specimens were tested using Luminex xTAG RVP Fast v1 assay. RESULTS: Seventy-nine consecutive allo-HSCT recipients developed a total of 192 virologically documented RVI episodes over 30 months...
November 15, 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/29152578/middle-east-respiratory-syndrome-coronavirus-nonstructural-protein-16-is-necessary-for-interferon-resistance-and-viral-pathogenesis
#7
Vineet D Menachery, Lisa E Gralinski, Hugh D Mitchell, Kenneth H Dinnon, Sarah R Leist, Boyd L Yount, Rachel L Graham, Eileen T McAnarney, Kelly G Stratton, Adam S Cockrell, Kari Debbink, Amy C Sims, Katrina M Waters, Ralph S Baric
Coronaviruses (CoVs) encode a mixture of highly conserved and novel genes, as well as genetic elements necessary for infection and pathogenesis, raising the possibility of common targets for attenuation and therapeutic design. In this study, we focused on highly conserved nonstructural protein 16 (NSP16), a viral 2'O-methyltransferase (2'O-MTase) that encodes critical functions in immune modulation and infection. Using reverse genetics, we disrupted a key motif in the conserved KDKE motif of Middle East respiratory syndrome CoV (MERS-CoV) NSP16 (D130A) and evaluated the effect on viral infection and pathogenesis...
November 2017: MSphere
https://www.readbyqxmd.com/read/29152574/human-intestinal-tract-serves-as-an-alternative-infection-route-for-middle-east-respiratory-syndrome-coronavirus
#8
Jie Zhou, Cun Li, Guangyu Zhao, Hin Chu, Dong Wang, Helen Hoi-Ning Yan, Vincent Kwok-Man Poon, Lei Wen, Bosco Ho-Yin Wong, Xiaoyu Zhao, Man Chun Chiu, Dong Yang, Yixin Wang, Rex K H Au-Yeung, Ivy Hau-Yee Chan, Shihui Sun, Jasper Fuk-Woo Chan, Kelvin Kai-Wang To, Ziad A Memish, Victor M Corman, Christian Drosten, Ivan Fan-Ngai Hung, Yusen Zhou, Suet Yi Leung, Kwok-Yung Yuen
Middle East respiratory syndrome coronavirus (MERS-CoV) has caused human respiratory infections with a high case fatality rate since 2012. However, the mode of virus transmission is not well understood. The findings of epidemiological and virological studies prompted us to hypothesize that the human gastrointestinal tract could serve as an alternative route to acquire MERS-CoV infection. We demonstrated that human primary intestinal epithelial cells, small intestine explants, and intestinal organoids were highly susceptible to MERS-CoV and can sustain robust viral replication...
November 2017: Science Advances
https://www.readbyqxmd.com/read/29149199/epidemiology-and-clinical-profile-of-pathogens-responsible-for-the-hospitalization-of-children-in-sousse-area-tunisia
#9
Ines Brini, Aida Guerrero, Naila Hannachi, Jihene Bouguila, Dorothea Orth-Höller, Amira Bouhlel, Lamia Boughamoura, Benjamin Hetzer, Wegene Borena, Britta Schiela, Dorothee Von Laer, Jalel Boukadida, Heribert Stoiber
This study aimed to identify a broad spectrum of respiratory pathogens from hospitalized and not-preselected children with acute respiratory tract infections in the Farhat Hached University-hospital of Sousse, Tunisia. Between September 2013 and December 2014, samples from 372 children aged between 1 month and 5 years were collected, and tested using multiplex real-time RT-PCR by a commercial assay for 21 respiratory pathogens. In addition, samples were screened for the presence of Streptococcus pneumoniae 16S rDNA using real-time PCR...
2017: PloS One
https://www.readbyqxmd.com/read/29143192/middle-east-respiratory-syndrome-and-severe-acute-respiratory-syndrome-current-therapeutic-options-and-potential-targets-for-novel-therapies
#10
REVIEW
Julie Dyall, Robin Gross, Jason Kindrachuk, Reed F Johnson, Gene G Olinger, Lisa E Hensley, Matthew B Frieman, Peter B Jahrling
No specific antivirals are currently available for two emerging infectious diseases, Middle East respiratory syndrome (MERS) and severe acute respiratory syndrome (SARS). A literature search was performed covering pathogenesis, clinical features and therapeutics, clinically developed drugs for repurposing and novel drug targets. This review presents current knowledge on the epidemiology, pathogenesis and clinical features of the SARS and MERS coronaviruses. The rationale for and outcomes with treatments used for SARS and MERS is discussed...
November 15, 2017: Drugs
https://www.readbyqxmd.com/read/29142129/entry-of-human-coronavirus-nl63-to-the-cell
#11
Aleksandra Milewska, Paulina Nowak, Katarzyna Owczarek, Artur Szczepanski, Miroslaw Zarebski, Agnieszka Hoang-Bujnowicz, Krzysztof Berniak, Jacek Wojarski, Slawomir Zeglen, Zbigniew Baster, Zenon Rajfur, Krzysztof Pyrc
First steps of human coronavirus NL63 (HCoV-NL63) infection were previously described. The virus binds to target cells by heparan sulfate proteoglycans, and interacts with the ACE2 protein. Subsequent events, including virus internalization and trafficking, remain to be elucidated. In this study, we mapped the process of HCoV-NL63 entry into LLC-Mk2 cell line and ex vivo 3D tracheobronchial tissue.Using a variety of techniques we have shown that HCoV-NL63 virions require endocytosis for successful entry to the LLC-MK2 cells, and interaction between the virus and the ACE2 molecule triggers recruitment of clathrin...
November 15, 2017: Journal of Virology
https://www.readbyqxmd.com/read/29129538/pneumonia-in-the-tropics-report-from-the-task-force-on-tropical-diseases-by-the-world-federation-of-societies-of-intensive-and-critical-care-medicine
#12
REVIEW
Mohd Basri Mat Nor, Guy A Richards, Steve McGloughlin, Pravin R Amin
The aetiology of community acquired pneumonia varies according to the region in which it is acquired. This review discusses those causes of CAP that occur in the tropics and might not be readily recognizable when transplanted to other sites. Various forms of pneumonia including the viral causes such as influenza (seasonal and avian varieties), the coronaviruses and the Hantavirus as well as bacterial causes, specifically the pneumonic form of Yersinia pestis and melioidosis are discussed.
November 3, 2017: Journal of Critical Care
https://www.readbyqxmd.com/read/29128390/nsp3-of-coronaviruses-structures-and-functions-of-a-large-multi-domain-protein
#13
REVIEW
Jian Lei, Yuri Kusov, Rolf Hilgenfeld
The multi-domain non-structural protein 3 (Nsp3) is the largest protein encoded by the coronavirus (CoV) genome, with an average molecular mass of about 200 kD. Nsp3 is an essential component of the replication/transcription complex. It comprises various domains, the organization of which differs between CoV genera, due to duplication or absence of some domains. However, eight domains of Nsp3 exist in all known CoVs: the ubiquitin-like domain 1 (Ubl1), the Glu-rich acidic domain (also called "hypervariable region"), a macrodomain (also named "X domain"), the ubiquitin-like domain 2 (Ubl2), the papain-like protease 2 (PL2(pro)), the Nsp3 ectodomain (3Ecto, also called "zinc-finger domain"), as well as the domains Y1 and CoV-Y of unknown functions...
November 8, 2017: Antiviral Research
https://www.readbyqxmd.com/read/29126397/no-mers-cov-but-positive-influenza-viruses-in-returning-hajj-pilgrims-china-2013-2015
#14
Xuezheng Ma, Fang Liu, Lijuan Liu, Liping Zhang, Mingzhu Lu, Abuduzhayier Abudukadeer, Lingbing Wang, Feng Tian, Wei Zhen, Pengfei Yang, Kongxin Hu
BACKGROUND: There is global health concern that the mass movement of pilgrims to and from Mecca annually could contribute to the international spread of Middle East Respiratory Syndrome Coronavirus (MERS-CoV). In China, about 11,000 Muslim pilgrims participate in the Hajj gathering in Mecca annually. This is the first report of MERS-CoV and respiratory virus molecular screening of returning pilgrims at points of entry in China from 2013 to 2015. METHODS AND RESULTS: A total of 847 returning Hajj pilgrims participated in this study...
November 10, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29119921/design-and-delivery-of-therapeutic-sirnas-application-to-mers-coronavirus
#15
Sayed Sartaj Sohrab, Sherif Aly El-Kafrawy, Zeenat Mirza, Mohammad Amjad Kamal, Esam Ibraheem Azhar
BACKGROUND: The MERS-CoV is a novel human coronavirus causing respiratory syndrome since April 2012. The replication of MERS-CoV is mediated by ORF 1ab and viral gene activity can be modulated by RNAi approach. The inhibition of virus replication has been documented in cell culture against multiple viruses by RNAi approach. Currently, very few siRNA against MERS-CoV have been computationally designed and published. METHODS: In this review, we have discussed the computationally designing and delivery of potential siRNAs...
November 8, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/29118313/feline-coronavirus-antibody-titer-in-cerebrospinal-fluid-from-cats-with-neurological-signs
#16
Takehisa Soma, Namiko Saito, Masato Kawaguchi, Kazumi Sasai
To investigate the utility of cerebrospinal fluid (CSF) anti-feline coronavirus (FCoV) antibody test for diagnosis of feline infectious peritonitis (FIP), the antibody titers were tested in CSF and sera from 271 FIP-suspected neurological cats. CSF antibody was detected in 28 cats, which were divided into 2 groups; 15 with CSF titer of 1:80 or lower and 13 with CSF titer of 1:640 or higher. In the latter group, reciprocal serum titer/reciprocal CSF titer was 8 or lower, which is extremely lower than normal range (256-2048), and FCoV RNA was detected in all of 11 CSF samples assayed by RT-PCR...
November 9, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/29116217/diversity-of-middle-east-respiratory-syndrome-coronaviruses-in-109-dromedary-camels-based-on-full-genome-sequencing-abu-dhabi-united-arab-emirates
#17
Mohammed Farouk Yusof, Krista Queen, Yassir Mohammed Eltahir, Clinton R Paden, Zulaikha Mohamed Abdel Hameed Al Hammadi, Ying Tao, Yan Li, Abdelmalik Ibrahim Khalafalla, Mang Shi, Jing Zhang, Muzammil Sayed Ahmed Elhaj Mohamed, Mahmud Hamed Abd Elaal Ahmed, Ihsaan Abdulwahab Azeez, Oum Keltoum Bensalah, Ziyada Swar Eldahab, Farida Ismail Al Hosani, Susan I Gerber, Aron J Hall, Suxiang Tong, Salama Suhail Al Muhairi
Middle East respiratory syndrome coronavirus (MERS-CoV) was identified on the Arabian Peninsula in 2012 and is still causing cases and outbreaks in the Middle East. When MERS-CoV was first identified, the closest related virus was in bats; however, it has since been recognized that dromedary camels serve as a virus reservoir and potential source for human infections. A total of 376 camels were screened for MERS-Cov at a live animal market in the Eastern Region of the Emirate of Abu Dhabi, UAE. In all, 109 MERS-CoV-positive camels were detected in week 1, and a subset of positive camels were sampled again weeks 3 through 6...
November 8, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/29115952/no-evidence-of-enteric-viral-involvement-in-the-new-neonatal-porcine-diarrhoea-syndrome-in-danish-pigs
#18
N B Goecke, C K Hjulsager, H Kongsted, M Boye, S Rasmussen, F Granberg, T K Fischer, S E Midgley, L D Rasmussen, Ø Angen, J P Nielsen, S E Jorsal, L E Larsen
BACKGROUND: The aim of this study was to investigate whether the syndrome New Neonatal Porcine Diarrhoea Syndrome (NNPDS) is associated with a viral aetiology. Four well-managed herds experiencing neonatal diarrhoea and suspected to be affected by NNPDS were included in a case-control set up. A total of 989 piglets were clinically examined on a daily basis. Samples from diarrhoeic and non-diarrhoeic piglets at the age of three to seven days were selected for extensive virological examination using specific real time polymerase chain reactions (qPCRs) and general virus detection methods...
November 7, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/29114190/knowledge-and-awareness-of-middle-east-respiratory-syndrome-coronavirus-among-saudi-and-non-saudi-arabian-pilgrims
#19
Hosam M Althobaity, Raed A S Alharthi, Mohammed H Altowairqi, Ziyad A Alsufyani, Nahar S Aloufi, Abdulrahman E Altowairqi, Abdulrahman S Alqahtani, Ali K Alzahrani, Ahmed S Abdel-Moneim
Objective: The current study was intended to evaluate the knowledge and awareness toward Middle East respiratory syndrome coronavirus (MERS-CoV) of pilgrims from Saudi Arabia and from different Arabian countries. Methods: A prospective study was conducted among pilgrims from Saudi Arabia and those from other Arab nations. A total number of 2120 participants including 736 Saudi pilgrims (436 males and 300 females) and 1384 non-Saudi Arabian pilgrims (1384; 909 males and 475 females) were included in the study...
November 2017: International Journal of Health Sciences
https://www.readbyqxmd.com/read/29114026/proofreading-deficient-coronaviruses-adapt-for-increased-fitness-over-long-term-passage-without-reversion-of-exoribonuclease-inactivating-mutations
#20
Kevin W Graepel, Xiaotao Lu, James Brett Case, Nicole R Sexton, Everett Clinton Smith, Mark R Denison
The coronavirus (CoV) RNA genome is the largest among the single-stranded positive-sense RNA viruses. CoVs encode a proofreading 3'-to-5' exoribonuclease within nonstructural protein 14 (nsp14-ExoN) that is responsible for CoV high-fidelity replication. Alanine substitution of ExoN catalytic residues [ExoN(-)] in severe acute respiratory syndrome-associated coronavirus (SARS-CoV) and murine hepatitis virus (MHV) disrupts ExoN activity, yielding viable mutant viruses with defective replication, up to 20-fold-decreased fidelity, and increased susceptibility to nucleoside analogues...
November 7, 2017: MBio
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