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https://www.readbyqxmd.com/read/29772527/a-novel-role-for-cd26-dipeptidyl-peptidase-iv-as-a-therapeutic-target
#1
Kei Ohnuma, Ryo Hatano, Eriko Komiya, Haruna Otsuka, Takumi Itoh, Noriaki Iwao, Yutaro Kaneko, Taketo Yamada, Nam H Dang, Chikao Morimoto
CD26 is a 110 kDa surface glycoprotein with intrinsic dipeptidyl peptidase IV activity that is expressed on numerous cell types and has a multitude of biological functions. The role of CD26 in immune regulation has been extensively characterized, with recent findings elucidating its linkage with signaling pathways and structures involved in T-lymphocyte activation as well as antigen presenting cell-T-cell interaction. In this paper, we will review emerging data on CD26-mediated immune regulation suggesting that CD26 may be an appropriate therapeutic target for the treatment of selected immune disorders as well as Middle East respiratory syndrome coronavirus...
June 1, 2018: Frontiers in Bioscience (Landmark Edition)
https://www.readbyqxmd.com/read/29772254/effect-of-interferon-alpha-and-cyclosporine-treatment-separately-and-in-combination-on-middle-east-respiratory-syndrome-coronavirus-mers-cov-replication-in-a-human-in-vitro-and-ex-vivo-culture-model
#2
H S Li, Denise I T Kuok, M C Cheung, Mandy M T Ng, K C Ng, Kenrie P Y Hui, J S Malik Peiris, Michael C W Chan, John M Nicholls
Middle East Respiratory Syndrome Coronavirus (MERS-CoV) has emerged as a coronavirus infection of humans in the past 5 years. Though confined to certain geographical regions of the world, infection has been associated with a case fatality rate of 35%, and this mortality may be higher in ventilated patients. As there are few readily available animal models that accurately mimic human disease, it has been a challenge to ethically determine what optimum treatment strategies can be used for this disease. We used in-vitro and human ex-vivo explant cultures to investigate the effect of two immunomodulatory agents, interferon alpha and cyclosporine, singly and in combination, on MERS-CoV replication...
May 14, 2018: Antiviral Research
https://www.readbyqxmd.com/read/29770590/genomic-and-antigenic-characterization-of-porcine-epidemic-diarrhoea-virus-strains-isolated-from-south-korea-2017
#3
Sunhee Lee, Changhee Lee
Porcine epidemic diarrhoea virus (PEDV) is a globally emerging and re-emerging enteric coronavirus in pigs causing serious economic threats to the world swine industry. Since the re-emergence of massive PEDV outbreaks in South Korea in 2013-2014, domestic pig farms have continued to experience PED epidemics or endemics. This study represents the molecular characterization of PEDV isolates identified in diarrhoeic animals collected across the country in 2017. Initial sequencing analysis of the full-length S genes revealed that 70% of the 2017 isolates (7/10) belong to the G2b subgroup, while the remaining isolates were classified as G1b...
May 16, 2018: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/29769478/mutation-of-the-s-and-3c-genes-in-genomes-of-feline-coronaviruses
#4
Keisuke Oguma, Megumi Ohno, Mayuko Yoshida, Hiroshi Sentsui
Feline coronavirus (FCoV) is classified into two biotypes based on its pathogenicity in cats: a feline enteric coronavirus of low pathogenicity and a highly virulent feline infectious peritonitis virus. It has been suspected that FCoV alters its biotype via mutations in the viral genome. The S and 3c genes of FCoV have been considered the candidates for viral pathogenicity conversion. In the present study, FCoVs were analyzed for the frequency and location of mutations in the S and 3c genes from faecal samples of cats in an animal shelter and the faeces, effusions, and tissues of cats that were referred to veterinary hospitals...
May 17, 2018: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/29769348/discovery-and-sequence-analysis-of-four-deltacoronaviruses-from-birds-in-the-middle-east-suggest-interspecies-jumping-and-recombination-as-potential-mechanism-for-avian-to-avian-and-avian-to-mammalian-transmission
#5
Susanna K P Lau, Emily Y M Wong, Chi-Ching Tsang, Syed Shakeel Ahmed, Rex K H Au-Yeung, Kwok-Yung Yuen, Ulrich Wernery, Patrick C Y Woo
The emergence of Middle East respiratory syndrome showed once again that coronaviruses (CoVs) in animals are potential source for epidemics in humans. To explore the diversity of deltacoronaviruses in animals in the Middle East, we tested fecal samples from 1,356 mammals and birds in Dubai. Four novel deltacoronaviruses were detected from eight birds of four species by RT-PCR: FalCoV UAE-HKU27 from a falcon, HouCoV UAE-HKU28 from a houbara bustard, PiCoV UAE-HKU29 from a pigeon and QuaCoV UAE-HKU30 from five quails...
May 16, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29769346/porcine-deltacoronavirus-accessory-protein-ns6-antagonizes-ifn-%C3%AE-production-by-interfering-with-the-binding-of-rig-i-mda5-to-double-stranded-rna
#6
Puxian Fang, Liurong Fang, Jie Ren, Yingying Hong, Xiaorong Liu, Yunyang Zhao, Dang Wang, Guiqing Peng, Shaobo Xiao
Porcine deltacoronavirus (PDCoV) has recently emerged as an enteric pathogen that can cause serious vomiting and diarrhea in suckling piglets. The first outbreak of PDCoV occurred in the United States in 2014 and was followed by reports of PDCoV in South Korea, China, Thailand, Lao people's Democratic Republic, and Vietnam, leading to economic losses for pig farms and posing considerable threat to the swine industry worldwide. Our previous studies have shown that PDCoV encodes three accessory proteins, NS6, NS7, and NS7a, but the functions of these proteins in viral replication, pathogenesis, and immune regulation remain unclear...
May 16, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29769338/the-perk-arm-of-the-unfolded-protein-response-negatively-regulates-transmissible-gastroenteritis-virus-replication-by-suppressing-protein-translation-and-promoting-type-i-ifn-production
#7
Mei Xue, Fang Fu, Yanlong Ma, Xin Zhang, Liang Li, Li Feng, Pinghuang Liu
Coronavirus replication is closely associated with the endoplasmic reticulum (ER), the primary cellular organelle for protein synthesis, folding, and modification. ER stress is a common consequence in coronavirus-infected cells. However, how the virus-induced ER stress influences coronavirus replication and pathogenesis remains controversial. Here, we demonstrated that infection with the alphacoronavirus transmissible gastroenteritis virus (TGEV) induced ER stress and triggered the unfolded protein response (UPR) in vitro and in vivo , and ER stress negatively regulated TGEV replication in vitro Although TGEV infection activated all three UPR pathways (ATF6, IRE1, and PERK), the virus-triggered UPR suppressed TGEV replication in both ST and IPEC-J2 cells primarily through activation of the PERK-eIF2α axis, as shown by functional studies with overexpression, siRNA, or specific chemical inhibitors...
May 16, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29763640/development-of-fluorescent-reverse-transcription-loop-mediated-isothermal-amplification-rt-lamp-using-quenching-probes-for-the-detection-of-the-middle-east-respiratory-syndrome-coronavirus
#8
Kazuya Shirato, Shohei Semba, Sherif A El-Kafrawy, Ahmed M Hassan, Ahmed M Tolah, Ikuyo Takayama, Tsutomu Kageyama, Tsugunori Notomi, Wataru Kamitani, Shutoku Matsuyama, Esam Ibraheem Azhar
Clinical detection of Middle East respiratory syndrome (MERS) coronavirus (MERS-CoV) in patients is achieved using genetic diagnostic methods, such as real-time RT-PCR assay. Previously, we developed a reverse transcription-loop-mediated isothermal amplification (RT-LAMP) assay for the detection of MERS-CoV [Virol J. 2014. 11:139]. Generally, amplification of RT-LAMP is monitored by the turbidity induced by precipitation of magnesium pyrophosphate with newly synthesized DNA. However, this mechanism cannot completely exclude the possibility of unexpected reactions...
May 12, 2018: Journal of Virological Methods
https://www.readbyqxmd.com/read/29760102/broad-receptor-engagement-of-an-emerging-global-coronavirus-may-potentiate-its-diverse-cross-species-transmissibility
#9
Wentao Li, Ruben J G Hulswit, Scott P Kenney, Ivy Widjaja, Kwonil Jung, Moyasar A Alhamo, Brenda van Dieren, Frank J M van Kuppeveld, Linda J Saif, Berend-Jan Bosch
Porcine deltacoronavirus (PDCoV), identified in 2012, is a common enteropathogen of swine with worldwide distribution. The source and evolutionary history of this virus is, however, unknown. PDCoV belongs to the Deltacoronavirus genus that comprises predominantly avian CoV. Phylogenetic analysis suggests that PDCoV originated relatively recently from a host-switching event between birds and mammals. Insight into receptor engagement by PDCoV may shed light into such an exceptional phenomenon. Here we report that PDCoV employs host aminopeptidase N (APN) as an entry receptor and interacts with APN via domain B of its spike (S) protein...
May 14, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29757717/radiographic-and-ct-features-of-viral-pneumonia
#10
Hyun Jung Koo, Soyeoun Lim, Jooae Choe, Sang-Ho Choi, Heungsup Sung, Kyung-Hyun Do
Viruses are the most common causes of respiratory infection. The imaging findings of viral pneumonia are diverse and overlap with those of other nonviral infectious and inflammatory conditions. However, identification of the underlying viral pathogens may not always be easy. There are a number of indicators for identifying viral pathogens on the basis of imaging patterns, which are associated with the pathogenesis of viral infections. Viruses in the same viral family share a similar pathogenesis of pneumonia, and the imaging patterns have distinguishable characteristics...
May 2018: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/29753119/replicative-virus-shedding-in-the-respiratory-tract-of-the-patients-with-middle-east-respiratory-syndrome-coronavirus-infection
#11
Wan Beom Park, Leo Lm Poon, Su-Jin Choi, Pyoeng Gyun Choe, Kyoung-Ho Song, Ji Hwan Bang, Eu Suk Kim, Hong Bin Kim, Sang Won Park, Nam Joong Kim, Malik Peiris, Myoung-Don Oh
BACKGROUND: Information on the duration of replicative Middle East respiratory syndrome coronavirus (MERS-CoV) shedding is important for infection control. Detection of MERS-CoV subgenomic mRNAs indicates the virus is replicative. We examined the duration for detecting MERS-CoV subgenomic mRNA compared with genomic RNA in diverse respiratory specimens METHODS: From upper and lower respiratory samples of 17 MERS-CoV-infected patients, MERS-CoV subgenomic mRNA was detected by reverse transcription polymerase chain reaction (RT-PCR) and MERS-CoV genomic RNA was done by real time RT-PCR...
May 9, 2018: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/29741740/human-coronavirus-nl63-molecular-epidemiology-and-evolutionary-patterns-in-rural-coastal-kenya
#12
Patience K Kiyuka, Charles N Agoti, Patrick K Munywoki, Regina Njeru, Anne Bett, James R Otieno, Grieven P Otieno, Everlyn Kamau, Taane G Clark, Lia van der Hoek, Paul Kellam, D James Nokes, Matthew Cotten
Background: Human coronavirus NL63 (HCoV-NL63) is a globally endemic pathogen causing mild and severe respiratory tract infections with reinfections occurring repeatedly throughout a lifetime. Methods: Nasal samples were collected in coastal Kenya through community-based and hospital-based surveillance. HCoV-NL63 was detected with multiplex real-time reverse transcription PCR, and positive samples were targeted for nucleotide sequencing of the spike (S) protein...
May 5, 2018: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29740099/early-events-during-human-coronavirus-oc43-entry-to-the-cell
#13
Katarzyna Owczarek, Artur Szczepanski, Aleksandra Milewska, Zbigniew Baster, Zenon Rajfur, Michal Sarna, Krzysztof Pyrc
The Coronaviridae family clusters a number of large RNA viruses, which share several structural and functional features. However, members of this family recognize different cellular receptors and exploit different entry routes, what affects their species specificity and virulence. The aim of this study was to determine how human coronavirus OC43 enters the susceptible cell. Using confocal microscopy and molecular biology tools we visualized early events during infection. We found that the virus employs caveolin-1 dependent endocytosis for the entry and the scission of virus-containing vesicles from the cell surface is dynamin-dependent...
May 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29739720/heterologous-prime-boost-vaccination-with-adenoviral-vector-and-protein-nanoparticles-induces-both-th1-and-th2-responses-against-middle-east-respiratory-syndrome-coronavirus
#14
Seo-Yeon Jung, Kyung Won Kang, Eun-Young Lee, Dong-Won Seo, Hong-Lim Kim, Hak Kim, TaeWoo Kwon, Hye-Lim Park, Hun Kim, Sang-Myeong Lee, Jae-Hwan Nam
The Middle East respiratory syndrome coronavirus (MERS-CoV) is a highly pathogenic and zoonotic virus with a fatality rate in humans of over 35%. Although several vaccine candidates have been developed, there is still no clinically available vaccine for MERS-CoV. In this study, we developed two types of MERS-CoV vaccines: a recombinant adenovirus serotype 5 encoding the MERS-CoV spike gene (Ad5/MERS) and spike protein nanoparticles formulated with aluminum (alum) adjuvant. Next, we tested a heterologous prime-boost vaccine strategy, which compared priming with Ad5/MERS and boosting with spike protein nanoparticles and vice versa, with homologous prime-boost vaccination comprising priming and boosting with either spike protein nanoparticles or Ad5/MERS...
May 5, 2018: Vaccine
https://www.readbyqxmd.com/read/29737284/middle-east-respiratory-syndrome-coronavirus-mers-mers-cov
#15
REVIEW
(no author information available yet)
No abstract text is available yet for this article.
September 2017: Disease-a-month: DM
https://www.readbyqxmd.com/read/29737283/emerging-respiratory-disease-coronaviruses
#16
REVIEW
(no author information available yet)
No abstract text is available yet for this article.
September 2017: Disease-a-month: DM
https://www.readbyqxmd.com/read/29736236/temporal-relationship-between-antibiotic-use-and-respiratory-virus-activities-in-the-republic-of-korea-a-time-series-analysis
#17
Sukhyun Ryu, Sojung Kim, Bryan I Kim, Eili Y Klein, Young Kyung Yoon, Byung Chul Chun
Background: Inappropriate use of antibiotics increases resistance and reduces their effectiveness. Despite evidence-based guidelines, antibiotics are still commonly used to treat infections likely caused by respiratory viruses. In this study, we examined the temporal relationships between antibiotic usage and respiratory infections in the Republic of Korea. Methods: The number of monthly antibiotic prescriptions and the incidence of acute respiratory tract infections between 2010 and 2015 at all primary care clinics were obtained from the Korean Health Insurance Review and Assessment Service...
2018: Antimicrobial Resistance and Infection Control
https://www.readbyqxmd.com/read/29732571/inactivation-of-ebola-virus-and-middle-east-respiratory-syndrome-coronavirus-in-platelet-concentrates-and-plasma-by-ultraviolet-c-light-and-methylene-blue-plus-visible-light-respectively
#18
Markus Eickmann, Ute Gravemann, Wiebke Handke, Frank Tolksdorf, Stefan Reichenberg, Thomas H Müller, Axel Seltsam
BACKGROUND: Ebola virus (EBOV) and Middle East respiratory syndrome coronavirus (MERS-CoV) have been identified as potential threats to blood safety. This study investigated the efficacy of the THERAFLEX UV-Platelets and THERAFLEX MB-Plasma pathogen inactivation systems to inactivate EBOV and MERS-CoV in platelet concentrates (PCs) and plasma, respectively. STUDY DESIGN AND METHODS: PCs and plasma were spiked with high titers of cell culture-derived EBOV and MERS-CoV, treated with various light doses of ultraviolet C (UVC; THERAFLEX UV-Platelets) or methylene blue (MB) plus visible light (MB/light; THERAFLEX MB-Plasma), and assessed for residual viral infectivity...
May 6, 2018: Transfusion
https://www.readbyqxmd.com/read/29727518/65-years-of-influenza-surveillance-by-a-who-coordinated-global-network
#19
Thedi Ziegler, Awandha Mamahit, Nancy J Cox
The 1918 devastating influenza pandemic left a lasting impact on influenza experts and the public, and the importance of global influenza surveillance was soon recognized. The WHO Global Influenza Surveillance Network (GISN) was founded in 1952 and renamed to Global Influenza Surveillance and Response System in 2011 upon the adoption by the World Health Assembly, of the Pandemic Influenza Preparedness Framework for the Sharing of Influenza Viruses and Access to Vaccines and Other Benefits ("PIP Framework")...
May 4, 2018: Influenza and Other Respiratory Viruses
https://www.readbyqxmd.com/read/29717007/selective-packaging-in-murine-coronavirus-promotes-virulence-by-limiting-type-i-interferon-responses
#20
Jeremiah Athmer, Anthony R Fehr, Matthew E Grunewald, Wen Qu, D Lori Wheeler, Kevin W Graepel, Rudragouda Channappanavar, Aimee Sekine, Dana Saud Aldabeeb, Michael Gale, Mark R Denison, Stanley Perlman
Selective packaging is a mechanism used by multiple virus families to specifically incorporate genomic RNA (gRNA) into virions and exclude other types of RNA. Lineage A betacoronaviruses incorporate a 95-bp stem-loop structure, the packaging signal (PS), into the nsp15 locus of ORF1b that is both necessary and sufficient for the packaging of RNAs. However, unlike other viral PSs, where mutations generally resulted in viral replication defects, mutation of the coronavirus (CoV) PS results in large increases in subgenomic RNA packaging with minimal effects on gRNA packaging in vitro and on viral titers...
May 1, 2018: MBio
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