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Respiratory syncytial virus

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https://www.readbyqxmd.com/read/28443266/cost-effectiveness-of-palivizumab-compared-to-no-prophylaxis-in-term-infants-residing-in-the-canadian-arctic
#1
Anna Banerji, Kaspar Ng, Theo J Moraes, Vladimir Panzov, Joan Robinson, Bonita E Lee
BACKGROUND: Hospital admissions for respiratory syncytial virus infection result in large health expenditures for Inuit infants. Palivizumab has been shown to be highly effective in reducing such admissions in preterm Inuit infants. We performed a cost-effectiveness analysis estimating the incremental cost-effectiveness ratio (ICER) for palivizumab prophylaxis per admission related to respiratory syncytial virus avoided in healthy term infants across the Canadian Arctic. METHODS: We compared universal palivizumab prophylaxis in term infants less than 6 months of age to no prophylaxis in 8 Arctic regions: the Northwest Territories, Nunavut, Nunavut without Iqaluit, the 3 subregions of Nunavut (Kitikmeot, Kivalliq and Qikiqtaaluk), the Qikiqtaaluk Region without Iqaluit, and Nunavik (northern Quebec)...
October 2016: CMAJ Open
https://www.readbyqxmd.com/read/28437470/respiratory-syncytial-virus-neutralizing-serum-antibody-titers-in-infants-following-palivizumab-prophylaxis-with-an-abbreviated-dosing-regimen
#2
Jennifer Claydon, Amitava Sur, Allison Callejas, Mihoko Ladd, Eddie Kwan, Richard Taylor, Stuart E Turvey, Alfonso Solimano, Pascal M Lavoie, Nico Marr
BACKGROUND: Monthly injections of palivizumab during the respiratory syncytial virus (RSV) season in at-risk infants reduces RSV-associated hospitalizations. However, the additive effect of naturally acquired immunity remains unclear. The objective of this study was to assess total neutralizing serum antibodies (NAb) against RSV in at-risk infants who had received an abbreviated course of palivizumab prophylaxis. METHODS: Serum samples were collected from infants enrolled in the RSV Immunoprophylaxis Program in British Columbia, Canada over 2 consecutive RSV seasons (2013 to 2015)...
2017: PloS One
https://www.readbyqxmd.com/read/28437435/infective-respiratory-syncytial-virus-is-present-in-human-cord-blood-samples-and-most-prevalent-during-winter-months
#3
Angela Mary Fonceca, Abha Chopra, Avram Levy, Paul Stanton Noakes, Matthew Wee-Peng Poh, Natasha Leanne Bear, Susan Prescott, Mark Lloyd Everard
BACKGROUND: Human respiratory syncytial virus (RSV) remains the most common cause of severe lower respiratory tract disease amongst infants, and continues to cause annual epidemics of respiratory disease every winter worldwide. Demonstrating placental transmission of viable RSV in human samples is a major paradigm shift in respiratory routes considered likely for RSV transmission. METHODS: Droplet digital PCR (ddPCR) was used to identify RSV present in cord blood mononucleocytes (CBM)...
2017: PloS One
https://www.readbyqxmd.com/read/28436965/a-three-dimensional-model-of-human-lung-development-and-disease-from-pluripotent-stem-cells
#4
Ya-Wen Chen, Sarah Xuelian Huang, Ana Luisa Rodrigues Toste de Carvalho, Siu-Hong Ho, Mohammad Naimul Islam, Stefano Volpi, Luigi D Notarangelo, Michael Ciancanelli, Jean-Laurent Casanova, Jahar Bhattacharya, Alice F Liang, Laura M Palermo, Matteo Porotto, Anne Moscona, Hans-Willem Snoeck
Recapitulation of lung development from human pluripotent stem cells (hPSCs) in three dimensions (3D) would allow deeper insight into human development, as well as the development of innovative strategies for disease modelling, drug discovery and regenerative medicine. We report here the generation from hPSCs of lung bud organoids (LBOs) that contain mesoderm and pulmonary endoderm and develop into branching airway and early alveolar structures after xenotransplantation and in Matrigel 3D culture. Expression analysis and structural features indicated that the branching structures reached the second trimester of human gestation...
May 2017: Nature Cell Biology
https://www.readbyqxmd.com/read/28436580/pulmonary-function-and-outcomes-in-infants-randomized-to-a-rescue-course-of-antenatal-steroids
#5
Cindy McEvoy, Diane Schilling, Patricia Spitale, Jean O'Malley, Susan Bowling, Manuel Durand
BACKGROUND/OBJECTIVE: Our objective was to obtain follow-up pulmonary function testing and assessment of clinical respiratory outcomes, at 1-2 years, in preterm infants whose mothers were randomized to a single rescue course of antenatal steroids (AS) versus placebo. METHODS: Follow-up of a randomized, double-blinded trial. In the original trial pregnant women ≥14 days after initial course of AS were randomized to rescue AS or placebo. Pulmonary function testing and a standardized respiratory questionnaire were obtained at 1-2 years of corrected age...
April 24, 2017: Pediatric Pulmonology
https://www.readbyqxmd.com/read/28436225/watsonianone-a-from-rhodomyrtus-tomentosa-fruit-attenuates-respiratory-syncytial-virus-induced-inflammation-in-vitro
#6
Ling Zhuang, Li-Feng Chen, Yu-Bo Zhang, Zhong Liu, Xu-Hui Xiao, Wei Tang, Guo-Cai Wang, Wen-Jun Song, Yao-Lan Li, Man-Mei Li
Respiratory syncytial virus (RSV) is one of the most common respiratory pathogens. Immoderate inflammation plays a great role in causing RSV-induced diseases. In the present study, watsonianone A, isolated from the fruit of Rhodomyrtus tomentosa (Ait.) Hassk, was found to show a good inhibitory effect on RSV-induced NO production, with a half-maximal inhibitory concentration of 37.2 ± 1.6 μM. Enzyme-linked immunosorbent assay and fluorescence quantitative polymerase chain reaction analyses indicated that watsonianone A markedly reduced both mRNA and protein levels of tumor necrosis factor α, interleukin 6, and monocyte chemoattractant protein 1 in RSV-infected RAW264...
April 24, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28433705/maternal-immunisation-collaborating-with-mother-nature
#7
REVIEW
Arnaud Marchant, Manish Sadarangani, Mathieu Garand, Nicolas Dauby, Valerie Verhasselt, Lenore Pereira, Gordean Bjornson, Christine E Jones, Scott A Halperin, Kathryn M Edwards, Paul Heath, Peter J Openshaw, David W Scheifele, Tobias R Kollmann
Maternal immunisation has the potential to substantially reduce morbidity and mortality from infectious diseases after birth. The success of tetanus, influenza, and pertussis immunisation during pregnancy has led to consideration of additional maternal immunisation strategies to prevent group B streptococcus and respiratory syncytial virus infections, among others. However, many gaps in knowledge regarding the immunobiology of maternal immunisation prevent the optimal design and application of this successful public health intervention...
April 19, 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/28433702/group-b-streptococcus-and-respiratory-syncytial-virus-immunisation-during-pregnancy-a-landscape-analysis
#8
REVIEW
Paul T Heath, Fiona J Culley, Christine E Jones, Beate Kampmann, Kirsty Le Doare, Marta C Nunes, Manish Sadarangani, Zain Chaudhry, Carol J Baker, Peter J M Openshaw
Group B streptococcus and respiratory syncytial virus are leading causes of infant morbidity and mortality worldwide. No licensed vaccines are available for either disease, but vaccines for both are under development. Severe respiratory syncytial virus disease can be prevented by passively administered antibody. The presence of maternal IgG antibody specific to respiratory syncytial virus is associated with reduced prevalence and severity of respiratory syncytial virus disease in the first few weeks of life, whereas maternal serotype-specific anticapsular antibody is associated with protection against both early-onset and late-onset group B streptococcus disease...
April 19, 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/28432927/type-2-bvdv-n-pro-suppresses-ifn-1-pathway-signaling-in-bovine-cells-and-augments-brsv-replication
#9
Abdulrahman A Alkheraif, Christina L Topliff, Jay Reddy, Chandirasegaran Massilamany, Ruben O Donis, Gregor Meyers, Kent M Eskridge, Clayton L Kelling
Bovine viral diarrhea virus (BVDV) infection induces immunosuppression and in conjunction with bovine respiratory syncytial virus (BRSV) contributes to the bovine respiratory disease complex. Bovine turbinate cells were single or co-infected with type 2 BVDV wild-type (BVDV2-wt), its dysfunctional N(pro) mutant (BVDV2-E), and/or BRSV. BVDV2-E significantly up-regulated PKR, IRF-7, TBK-1, IRF-3, and IFN-β mRNAs based on real-time Q-RT-PCR. BRSV-infected cells expressed significantly up-regulated PKR, IRF-3, IRF-7, and IFN-β mRNAs, whereas BVDV2-wt, but not BVDV2-E, abolished this up-regulation in co-infection...
April 19, 2017: Virology
https://www.readbyqxmd.com/read/28430397/respiratory-virus-detection-during-hospitalisation-for-lower-respiratory-tract-infection-in-children-under-2-years-in-south-auckland-new-zealand
#10
Adrian A Trenholme, Emma J Best, Alison M Vogel, Joanna M Stewart, Charissa J Miller, Diana R Lennon
AIM: To describe respiratory virus detection in children under 2 years of age in a population admitted with lower respiratory infection and to assess correlation with measures of severity. METHODS: Nasopharyngeal aspirates from infants admitted with lower respiratory tract infection (n = 1645) over a 3-year time period were tested by polymerase chain reaction. We collected epidemiological and clinical data on all children. We assessed the correlation of presence of virus with length of hospital stay, intensive care admission and consolidation on chest X-ray...
April 21, 2017: Journal of Paediatrics and Child Health
https://www.readbyqxmd.com/read/28429610/tomentodione-e-a-new-sec-pentyl-syncarpic-acid-based-meroterpenoid-from-the-leaves-of-rhodomyrtus-tomentosa
#11
Jie Liu, Jian-Guo Song, Jun-Cheng Su, Xiao-Jun Huang, Wen-Cai Ye, Ying Wang
A new meroterpenoid, tomentodione E (1), along with four known ones (2-5) were isolated from the leaves of Rhodomyrtus tomentosa. Their structures were elucidated based on extensive spectroscopic data as well as computational methods. Compound 1 represents the first example of meroterpenoid possessing a sec-pentyl syncarpic acid motif coupled with a caryophyllene. Compounds 1-4 were evaluated for their in vitro antiviral activity against respiratory syncytial virus (RSV) with cytopathic effect (CPE) reduction assay, and 2 showed potent in vitro anti-RSV effect...
April 21, 2017: Journal of Asian Natural Products Research
https://www.readbyqxmd.com/read/28424887/a-metagenomics-study-for-the-identification-of-respiratory-viruses-in-mixed-clinical-specimens-an-application-of-the-iterative-mapping-approach
#12
Yu-Nong Gong, Shu-Li Yang, Guang-Wu Chen, Yu-Wen Chen, Yhu-Chering Huang, Hsiao-Chen Ning, Kuo-Chien Tsao
Metagenomic approaches to detect viral genomes and variants in clinical samples have various challenges, including low viral titers and bacterial and human genome contamination. To address these limitations, we examined a next-generation sequencing (NGS) and iterative mapping approach for virus detection in clinical samples. We analyzed 40 clinical specimens from hospitalized children diagnosed with acute bronchiolitis, croup, or respiratory tract infections in which virus identification by viral culture or polymerase chain reaction (PCR) was unsuccessful...
April 19, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28423465/febrile-status-epilepticus-due-to-respiratory-syncytial-virus-infection
#13
Kazuhiro Uda, Katsuhiko Kitazawa
BACKGROUND: Febrile status epilepticus can have neurological sequelae. The type of sequelae, however, may depend on the etiology, including infections by viral agents such as the influenza virus. Respiratory syncytial virus (RSV) infection in childhood suggests a similar role for this pathogen. The aim of this study was to characterize febrile status epilepticus associated with RSV infection, and to determine whether this type of infection is a risk factor for neurological sequelae with febrile status epilepticus...
April 19, 2017: Pediatrics International: Official Journal of the Japan Pediatric Society
https://www.readbyqxmd.com/read/28423192/systematic-review-of-the-safety-and-efficacy-of-palivizumab-among-infants-and-young-children-with-cystic-fibrosis
#14
Kok Pim Kua, Shaun Wen Huey Lee
BACKGROUND: Respiratory syncytial virus (RSV) is a common pathogen in infants with cystic fibrosis (CF). The use of palivizumab prophylaxis for RSV infection as the standard of care for infants with CF remains controversial. OBJECTIVE: To evaluate the efficacy of palivizumab in reducing the incidence of RSV hospitalization in children with CF who are younger than 2 years of age. METHODS: Four electronic databases (PubMed, Embase, CINAHL, and CENTRAL) were searched from inception until January 31, 2017 for clinical studies investigating the use of palivizumab in infants with CF aged less than 2 years...
April 19, 2017: Pharmacotherapy
https://www.readbyqxmd.com/read/28418771/persistence-in-temporary-lung-niches-a-survival-strategy-of-lung-resident-memory-cd8-t-cells
#15
Shiki Takamura
Respiratory virus infections, such as those mediated by influenza virus, parainfluenza virus, respiratory syncytial virus (RSV), severe acute respiratory syndrome coronavirus (SARS-CoV), rhinovirus, and adenovirus, are responsible for substantial morbidity and mortality, especially in children and older adults. Furthermore, the potential emergence of highly pathogenic strains of influenza virus poses a significant public health threat. Thus, the development of vaccines capable of eliciting long-lasting protective immunity to those pathogens is a major public health priority...
April 18, 2017: Viral Immunology
https://www.readbyqxmd.com/read/28414749/sequence-variability-of-the-respiratory-syncytial-virus-rsv-fusion-gene-among-contemporary-and-historical-genotypes-of-rsv-a-and-rsv-b
#16
Anne M Hause, David M Henke, Vasanthi Avadhanula, Chad A Shaw, Lorena I Tapia, Pedro A Piedra
BACKGROUND: The fusion (F) protein of RSV is the major vaccine target. This protein undergoes a conformational change from pre-fusion to post-fusion. Both conformations share antigenic sites II and IV. Pre-fusion F has unique antigenic sites p27, ø, α2α3β3β4, and MPE8; whereas, post-fusion F has unique antigenic site I. Our objective was to determine the antigenic variability for RSV/A and RSV/B isolates from contemporary and historical genotypes compared to a historical RSV/A strain...
2017: PloS One
https://www.readbyqxmd.com/read/28414106/molecular-evolution-of-the-fusion-protein-f-gene-in-human-respiratory-syncytial-virus-subgroup-b
#17
Hirokazu Kimura, Koo Nagasawa, Ryusuke Kimura, Hiroyuki Tsukagoshi, Yuki Matsushima, Kiyotaka Fujita, Eiko Hirano, Naruhiko Ishiwada, Takako Misaki, Kazunori Oishi, Makoto Kuroda, Akihide Ryo
In this study, we examined the molecular evolution of the fusion protein (F) gene in human respiratory syncytial virus subgroup B (HRSV-B). First, we performed time-scale evolution analyses using the Bayesian Markov chain Monte Carlo (MCMC) method. Next, we performed genetic distance, linear B-cell epitope prediction, N-glycosylation, positive/negative selection site, and Bayesian skyline plot analyses. We also constructed a structural model of the F protein and mapped the amino acid substitutions and the predicted B-cell epitopes...
April 14, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28413995/the-burden-of-seasonal-respiratory-infections-on-a-national-telehealth-service-in-england
#18
R A Morbey, S Harcourt, R Pebody, M Zambon, J Hutchison, J Rutter, H Thomas, G E Smith, A J Elliot
Seasonal respiratory illnesses present a major burden on primary care services. We assessed the burden of respiratory illness on a national telehealth system in England and investigated the potential for providing early warning of respiratory infection. We compared weekly laboratory reports for respiratory pathogens with telehealth calls (NHS 111) between week 40 in 2013 and week 29 in 2015. Multiple linear regression was used to identify which pathogens had a significant association with respiratory calls...
April 17, 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/28413427/immunogenicity-and-safety-of-a-respiratory-syncytial-virus-fusion-protein-rsv-f-nanoparticle-vaccine-in-older-adults
#19
Louis Fries, Vivek Shinde, Jeffrey J Stoddard, D Nigel Thomas, Eloi Kpamegan, Hanxin Lu, Gale Smith, Somia P Hickman, Pedro Piedra, Gregory M Glenn
BACKGROUND: A preventative strategy for Respiratory Syncytial Virus (RSV) infection constitutes an under-recognized unmet medical need among older adults. Four formulations of a novel recombinant RSV F nanoparticle vaccine (60 or 90 μg RSV F protein, with or without aluminum phosphate adjuvant) administered concurrently with a licensed inactivated trivalent influenza vaccine (TIV) in older adult subjects were evaluated for safety and immunogenicity in this randomized, observer-blinded study...
2017: Immunity & Ageing: I & A
https://www.readbyqxmd.com/read/28413132/development-of-an-intradermal-dna-vaccine-delivery-strategy-to-achieve-single-dose-immunity-against-respiratory-syncytial-virus
#20
Trevor R F Smith, Katherine Schultheis, Matthew P Morrow, Kimberly A Kraynyak, Jay R McCoy, Kevin C Yim, Karuppiah Muthumani, Laurent Humeau, David B Weiner, Niranjan Y Sardesai, Kate E Broderick
Respiratory syncytial virus (RSV) is a massive medical burden in infants, children and the elderly worldwide, and an effective, safe RSV vaccine remains an unmet need. Here we assess a novel vaccination strategy based on the intradermal delivery of a SynCon® DNA-based vaccine encoding engineered RSV-F antigen using a surface electroporation device (SEP) to target epidermal cells, in clinically relevant experimental models. We demonstrate the ability of this strategy to elicit robust immune responses. Importantly we demonstrate complete resistance to pulmonary infection at a single low dose of vaccine in the cotton rat RSV/A challenge model...
April 13, 2017: Vaccine
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