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Respiratory Syncytial Virus vaccine

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https://www.readbyqxmd.com/read/28418771/persistence-in-temporary-lung-niches-a-survival-strategy-of-lung-resident-memory-cd8-t-cells
#1
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
#2
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/28413427/immunogenicity-and-safety-of-a-respiratory-syncytial-virus-fusion-protein-rsv-f-nanoparticle-vaccine-in-older-adults
#3
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
#4
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
https://www.readbyqxmd.com/read/28412077/influenza-vaccine-effectiveness-estimates-in-the-dutch-population-from-2003-to-2014-the-test-negative-design-case-control-study-with-different-control-groups
#5
Eva van Doorn, Maryam Darvishian, Frederika Dijkstra, Gé A Donker, Pieter Overduin, Adam Meijer, Eelko Hak
Information about influenza vaccine effectiveness (IVE) is important for vaccine strain selection and immunization policy decisions. The test-negative design (TND) case-control study is commonly used to obtain IVE estimates. However, the definition of the control patients may influence IVE estimates. We have conducted a TND study using the Dutch Sentinel Practices of NIVEL Primary Care Database which includes data from patients who consulted the General Practitioner (GP) for an episode of acute influenza-like illness (ILI) or acute respiratory infection (ARI) with known influenza vaccination status...
April 12, 2017: Vaccine
https://www.readbyqxmd.com/read/28404847/characterization-of-pre-f-gcn4t-a-modified-human-respiratory-syncytial-virus-fusion-protein-stabilized-in-a-non-cleaved-pre-fusion-conformation
#6
Normand Blais, Martin Gagné, Yoshitomo Hamuro, Patrick Rheault, Martine Boyer, Ann-Muriel Steff, Guy Baudoux, Vincent Dewar, Josée Demers, Jean-Louis Ruelle, Denis Martin
Human respiratory syncytial virus (hRSV) fusion protein (F) is considered a major target of the neutralizing antibody response to hRSV. This glycoprotein undergoes a major structural shift from pre- (pre-F) to post-fusion (post-F) state at the time of virus-host cell membrane fusion. Recent evidences suggest that the pre-F state may be a superior target for neutralizing antibodies than post-F. Therefore, for vaccine purposes, we have designed and characterized a recombinant hRSV F protein, called Pre-F-GCN4t, stabilized in a pre-F conformation...
April 12, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28398678/maternal-immunization
#7
Helen Y Chu, Janet A Englund
Pregnant women, neonates, and infants are at higher risk for severe infections due to vaccine-preventable diseases. Very young infants rarely respond well to vaccination due to poor immunogenicity and interference from maternal antibody. Maternal immunization protects the mother and fetus from disease and protects the infant through transplacental antibody transfer through the first 6 months of life. Currently, immunizations routinely recommended during pregnancy include inactivated influenza, tetanus toxoid, and acellular pertussis vaccines...
March 15, 2017: Birth Defects Res
https://www.readbyqxmd.com/read/28384263/universal-vaccine-against-respiratory-syncytial-virus-a-and-b-subtypes
#8
Jeong-Yoon Lee, Jun Chang
Respiratory syncytial virus (RSV) is a major cause of acute lower respiratory tract infection in infants, young children, and the elderly. Two subtypes of RSV, A and B, circulate alternately at 1-2-year intervals during epidemics. The attachment glycoprotein (G protein) of RSV is one of the major targets for immune responses. In this study, we generated a recombinant fusion protein, GcfAB, which consists of the central regions (a.a. residues 131-230) of the G proteins of both RSV A (A2 strain) and B (B1 strain) subtypes, and investigated immunogenicity, protective efficacy, and immunopathology...
2017: PloS One
https://www.readbyqxmd.com/read/28373908/surveillance-for-respiratory-infectious-diseases-caused-by-6-common-viruses-in-a-recruit-training-site-in-the-northern-region-of-china
#9
Wei-Wei Chen, Wen Xu, Yang-Xin Xie, Yun-Hui Zhang, Dan Wu, Fu-Sheng Wang, Min Zhao
BACKGROUND: Recruit training sites are places with a high incidence of respiratory infectious diseases. Effective surveillance for acute respiratory infectious diseases in a recruit training site is an important way to prevent disease outbreaks. METHODS: Eight hundred recruits (722 males and 78 females) enlisted in autumn 2015 received a background survey within 24 h of settlement at the recruit training site, including their general personal information, vaccination history, mental status and clinical symptoms...
2017: Military Medical Research
https://www.readbyqxmd.com/read/28368456/interference-between-respiratory-syncytial-virus-and-human-rhinovirus-infection-in-infancy
#10
Niek B Achten, Pingsheng Wu, Louis Bont, Maarten O Blanken, Tebeb Gebretsadik, James D Chappell, Li Wang, Chang Yu, Emma K Larkin, Kecia N Carroll, Larry J Anderson, Martin L Moore, Chantel D Sloan, Tina V Hartert
Background.: Respiratory syncytial virus (RSV) and human rhinovirus (HRV) are the most common viruses associated with acute respiratory tract infections in infancy. Viral interference is important in understanding respiratory viral circulation and the impact of vaccines. Methods.: To study viral interference, we evaluated cases of RSV and HRV codetection by polymerase chain reaction in 2 prospective birth cohort studies (the Infant Susceptibility to Pulmonary Infections and Asthma Following RSV Exposure [INSPIRE] study and the Tennessee Children's Respiratory Initiative [TCRI]) and a double-blinded, randomized, controlled trial (MAKI), using adjusted multivariable regression analyses...
March 24, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28340310/viruses-in-cystic-fibrosis-patients-airways
#11
Lisa Billard, Rozenn Le Berre, Léa Pilorgé, Christopher Payan, Geneviève Héry-Arnaud, Sophie Vallet
Although bacteria have historically been considered to play a major role in cystic fibrosis (CF) airway damage, a strong impact of respiratory viral infections (RVI) is also now recognized. Emerging evidence confirms that respiratory viruses are associated with deterioration of pulmonary function and exacerbation and facilitation of bacterial colonization in CF patients. The aim of this review is to provide an overview of the current knowledge on respiratory viruses in CF airways, to discuss the resulting inflammation and RVI response, to determine how to detect the viruses, and to assess their clinical consequences, prevalence, and interactions with bacteria...
March 24, 2017: Critical Reviews in Microbiology
https://www.readbyqxmd.com/read/28330443/influenza-and-respiratory-syncytial-virus-in-infants-study-iris-of-hospitalized-and-non-ill-infants-aged-1-year-in-four-countries-study-design-and-methods
#12
Mark G Thompson, Danielle R Hunt, Ali K Arbaji, Artan Simaku, Veronica L Tallo, Holly M Biggs, Carolyn Kulb, Aubree Gordon, Ilham Abu Khader, Silvia Bino, Marilla G Lucero, Eduardo Azziz-Baumgartner, Pat Shifflett, Felix Sanchez, Basima I Marar, Ilirjana Bakalli, Eric A F Simões, Min Z Levine, Jennifer K Meece, Angel Balmaseda, Tareq M Al-Sanouri, Majlinda Dhimolea, Joanne N de Jesus, Natalie J Thornburg, Susan I Gerber, Lionel Gresh
BACKGROUND: This multi-country prospective study of infants aged <1 year aims to assess the frequency of influenza virus and respiratory syncytial virus (RSV) infections associated with hospitalizations, to describe clinical features and antibody response to infection, and to examine predictors of very severe disease requiring intensive care. METHODS/DESIGN: We are enrolling a hospital-based cohort and a sample of non-ill infants in four countries (Albania, Jordan, Nicaragua, and the Philippines) using a common protocol...
March 22, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28320361/estimates-of-hospitalization-attributable-to-influenza-and-rsv-in-the-us-during-1997-2009-by-age-and-risk-status
#13
Gonçalo Matias, Robert Taylor, François Haguinet, Cynthia Schuck-Paim, Roger Lustig, Vivek Shinde
BACKGROUND: Estimates of influenza and respiratory syncytial virus (RSV) burden must be periodically updated to inform public health strategies. We estimated seasonal influenza- and RSV-attributable hospitalizations in the US from 1997 to 2009 according to age and risk status (NCT01599390). METHODS: Multiple linear regression modelling was used to attribute hospitalizations to influenza or RSV using virological surveillance and hospitalization data. Hospitalization data were obtained from the US Nationwide Inpatient Sample and virology data were obtained from FluView (Centers for Disease Control and Prevention)...
March 21, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28302410/meeting-report-who-consultation-on-respiratory-syncytial-virus-rsv-vaccine-development-geneva-25-26-april-2016
#14
Birgitte K Giersing, Ruth A Karron, Johan Vekemans, David C Kaslow, Vasee S Moorthy
Respiratory syncytial virus (RSV) is a leading viral cause of respiratory morbidity and mortality in infants and young children worldwide. Low and middle income countries (LMICs) account for approximately 99% of the global mortality estimates in this population, with up to 200,000 RSV deaths per year. The vaccine product development pipeline is diverse with the most advanced clinical candidate currently in phase III efficacy testing in pregnant women. In addition, a long-acting RSV-neutralizing monoclonal antibody (mAb) to be administered at birth to prevent serious RSV-related respiratory disease is in late stage clinical development, as are additional conventional mAb for use in high-risk infants...
March 14, 2017: Vaccine
https://www.readbyqxmd.com/read/28298602/a-single-dose-recombinant-piv5-expressing-respiratory-syncytial-virus-f-and-g-proteins-protected-cotton-rats-and-african-green-monkeys-from-rsv-challenge
#15
Dai Wang, Shannon Phan, Daniel J DiStefano, Michael P Citron, Cheryl L Callahan, Lani Indrawati, Sheri A Dubey, Gwendolyn J Heidecker, Dhanasekaran Govindarajan, Xiaoping Liang, Biao He, Amy S Espeseth
Human respiratory syncytial virus (RSV) is a common cause of severe respiratory disease among infants, immunocompromised individuals and the elderly. No licensed vaccine is currently available. In this study, we evaluated two parainfluenza virus 5 (PIV5)-vectored vaccines expressing RSV F (PIV5/F) or G (PIV5/G) proteins in the cotton rat and African green monkey models for their replication, immunogenicity and efficacy of protection against RSV challenge. Following a single intranasal inoculation, both animal species shed the vaccine viruses for a limited time but without noticeable clinical symptoms...
March 15, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28275196/mutating-the-cx3c-motif-in-the-g-protein-should-make-a-live-respiratory-syncytial-virus-vaccine-safer-and-more-effective
#16
S Boyoglu-Barnum, S O Todd, J Meng, T R Barnum, T Chirkova, L M Haynes, S J Jadhao, R A Tripp, A G Oomens, M L Moore, L J Anderson
Respiratory syncytial virus (RSV) belongs to the family Paramyxoviridae and is the single most important cause of serious lower respiratory tract infections in young children, yet no highly effective treatment or vaccine is available. Through a CX3C chemokine motif ((182)CWAIC(186)) in the G protein, RSV binds to the corresponding chemokine receptor, CX3CR1. Since RSV binding to CX3CR1 contributes to disease pathogenesis, we investigated whether a mutation in the CX3C motif by insertion of an alanine A(186) within the CX3C motif to CX4C ((182)CWAIAC(187)), known to block binding to CX3CR1, might decrease disease...
March 8, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28275186/cpg-in-combination-with-an-inhibitor-of-notch-signaling-suppresses-fi-rsv-enhanced-airway-hyperresponsiveness-and-inflammation-through-inhibiting-th17-memory-responses-and-promoting-tissue-resident-memory-cells-in-lungs
#17
Lei Zhang, Hongyong Li, Yan Hai, Wei Yin, Wenjian Li, Boyang Zheng, Xiaomin Du, Na Li, Zhengzheng Zhang, Yuqing Deng, Ruihong Zeng, Lin Wei
Respiratory syncytial virus (RSV) is the leading cause of childhood hospitalizations. The formalin-inactivated RSV (FI-RSV) vaccine enhanced respiratory disease (ERD) has been an obstacle to the development of a safe and effective killed RSV vaccine. Agonists of Toll-like receptor (TLR) have been shown to regulate immune responses induced by FI-RSV. Notch signaling plays critical roles during the differentiation and effector function phases of innate and adaptive immune responses. Cross-talk between TLR and Notch signaling pathways results in fine tuning of TLR-triggered innate inflammatory responses...
March 8, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28275185/broadly-reactive-anti-rsv-g-antibodies-from-exposed-individuals-effectively-inhibit-infection-of-primary-airway-epithelial-cells
#18
B Cortjens, E Yasuda, X Yu, K Wagner, Y B Claassen, A Q Bakker, J B M van Woensel, T Beaumont
Respiratory syncytial virus (RSV) causes severe respiratory disease in young children. Antibodies specific for the RSV prefusion F protein have guided RSV vaccine research and in human serum these antibodies attribute to >90% of the neutralization response, however detailed insight in the composition of the human B cell repertoire against RSV is still largely unknown. In order to study the B cell repertoire of 3 healthy donors for specificity against RSV, CD27(+) memory B cells were isolated and immortalized using BCL6 and Bcl-xL...
March 8, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28274639/a-recombinant-subunit-vaccine-for-bovine-rsv-and-histophilus-somni-protects-calves-against-dual-pathogen-challenge
#19
Laurel J Gershwin, Nicole E Behrens, Heather A McEligot, Francisco R Carvallo-Chaigneau, Lauren T Crum, Brianna M Gunnarson, Lynette B Corbeil
Bovine respiratory syncytial virus (BRSV) and Histophilus somni synergize to cause respiratory disease in cattle. These pathogens cause enhanced disease during dual-infection and an IgE response to antigens of H. somni in dual-infected but not singly infected calves. Vaccines containing whole inactivated BRSV or H. somni have been associated with IgE responses A vaccine strategy that avoids stimulation of IgE antibodies would provide superior protection from dual infection. We hypothesized that a subunit vaccine consisting of the nucleoprotein (NP) from BRSV and the recombinant antigen IbpA DR2 (a surface antigen of H...
March 5, 2017: Vaccine
https://www.readbyqxmd.com/read/28273842/immunological-features-of-respiratory-syncytial-virus-caused-pneumonia-implications-for-vaccine-design
#20
REVIEW
Emma Rey-Jurado, Alexis M Kalergis
The human respiratory syncytial virus (hRSV) is the causative agent for high rates of hospitalizations due to viral bronchiolitis and pneumonia worldwide. Such a disease is characterized by an infection of epithelial cells of the distal airways that leads to inflammation and subsequently to respiratory failure. Upon infection, different pattern recognition receptors recognize the virus and trigger the innate immune response against the hRSV. Further, T cell immunity plays an important role for virus clearance...
March 4, 2017: International Journal of Molecular Sciences
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