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https://www.readbyqxmd.com/read/29679740/dissecting-host-cell-death-programs-in-the-pathogenesis-of-influenza
#1
Jeffrey Downey, Erwan Pernet, François Coulombe, Maziar Divangahi
Influenza A virus (IAV) is a pulmonary pathogen, responsible for significant yearly morbidity and mortality. Due to the absence of highly effective antiviral therapies and vaccine, as well as the constant threat of an emerging pandemic strain, there is considerable need to better understand the host-pathogen interactions and the factors that dictate a protective versus detrimental immune response to IAV. Even though evidence of IAV-induced cell death in human pulmonary epithelial and immune cells has been observed for almost a century, very little is known about the consequences of cell death on viral pathogenesis...
April 18, 2018: Microbes and Infection
https://www.readbyqxmd.com/read/29678747/predictive-markers-for-humoral-influenza-vaccine-response-in-patients-with-common-variable-immunodeficiency-cvid
#2
Ann Gardulf, Hassan Abolhassani, Rolf Gustafson, Lars E Eriksson, Lennart Hammarström
BACKGROUND: A subgroup of patients with common variable immunodeficiencies (CVID) responds to vaccination. The aim of the study was to try to identify predictive markers for those who developed a humoral immune response after influenza vaccination. METHODS: 48 patients with CVID (29 females, 19 males, mean age 59.4 years) were vaccinated with the A(H1N1) influenza vaccine Pandemrix® and boosted after one month. Blood samples were collected prior to each vaccination and two months later...
April 17, 2018: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29678500/a-bench-top-automated-workstation-for-nucleic-acid-isolation-from-clinical-sample-types
#3
Nitu Thakore, Steve Garber, Arial Bueno, Peter Qu, Ryan Norville, Michael Villanueva, Darrell P Chandler, Rebecca Holmberg, Christopher G Cooney
Systems that automate extraction of nucleic acid from cells or viruses in complex clinical matrices have tremendous value even in the absence of an integrated downstream detector. We describe our bench-top automated workstation that integrates our previously-reported extraction method - TruTip - with our newly-developed mechanical lysis method. This is the first report of this method for homogenizing viscous and heterogeneous samples and lysing difficult-to-disrupt cells using "MagVor": a rotating magnet that rotates a miniature stir disk amidst glass beads confined inside of a disposable tube...
April 17, 2018: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/29678459/impact-of-elementary-school-located-influenza-vaccinations-a-stepped-wedge-trial-across-a-community
#4
Peter G Szilagyi, Stanley Schaffer, Cynthia M Rand, Nicolas P N Goldstein, A Dirk Hightower, Mary Younge, Ashley Eagan, Aaron Blumkin, Christina S Albertin, Kristine DiBitetto, Cathleen Concannon, Phyllis Vincelli, Byung-Kwang Yoo, Sharon G Humiston
BACKGROUND: Influenza vaccination rates among children are low and novel strategies are needed to raise coverage. We measured the impact of school-located influenza vaccination (SLIV) on coverage, examined whether SLIV substitutes for practice-based influenza vaccination ("substitution"), and estimated whether a second year of experience with SLIV increases its impact. METHODS: We implemented a stepped wedge study design with schools as clusters. In Year 1, we randomly allocated schools to SLIV or control...
April 17, 2018: Vaccine
https://www.readbyqxmd.com/read/29678452/ultraviolet-germicidal-irradiation-of-influenza-contaminated-n95-filtering-facepiece-respirators
#5
Devin Mills, Delbert A Harnish, Caryn Lawrence, Megan Sandoval-Powers, Brian K Heimbuch
BACKGROUND: Safe and effective decontamination and reuse of N95 filtering facepiece respirators (FFRs) has the potential to significantly extend FFR holdings, mitigating a potential shortage due to an influenza pandemic or other pandemic events. Ultraviolet germicidal irradiation (UVGI) has been shown to be effective for decontaminating influenza-contaminated FFRs. This study aims to build on past research by evaluating the UVGI decontamination efficiency of influenza-contaminated FFRs in the presence of soiling agents using an optimized UVGI dose...
April 17, 2018: American Journal of Infection Control
https://www.readbyqxmd.com/read/29678227/humoral-and-cell-mediated-immune-responses-to-influenza-vaccination-in-equine-metabolic-syndrome-ems-horses
#6
Sarah Elzinga, Stephanie Reedy, Virginia D Barker, Thomas M Chambers, Amanda A Adams
Obesity is an increasing problem in the equine population with recent reports indicating that the percentage of overweight horses may range anywhere from 20.6-51%. Obesity in horses has been linked to more serious health concerns such as equine metabolic syndrome (EMS). EMS is a serious problem in the equine industry given its defining characteristics of insulin dysregualtion and obesity, as well as the involvement of laminitis. Little research however has been conducted to determine the effects of EMS on routine healthcare of these horses, in particular how they respond to vaccination...
May 2018: Veterinary Immunology and Immunopathology
https://www.readbyqxmd.com/read/29677943/uptake-of-a-dashboard-designed-to-give-realtime-feedback-to-a-sentinel-network-about-key-data-required-for-influenza-vaccine-effectiveness-studies
#7
Sameera Pathirannehelage, Pushpa Kumarapeli, Rachel Byford, Ivelina Yonova, Filipa Ferreira, Simon de Lusignan
Dashboards are technologies that bringing together a range of data sources for observational or analytical purposes. We have created a customised dashboard that includes all the key data elements required for monitoring flu vaccine effectiveness (FVE). This delivers a unique dashboard for each primary care provider (general practice) providing data to the Royal College of General Practitioners (RCGP) Research and Surveillance Centre (RSC), one of the oldest European surveillance systems. These FVE studies use a test negative case control (TNCC) design...
2018: Studies in Health Technology and Informatics
https://www.readbyqxmd.com/read/29677684/universal-influenza-virus-vaccines-and-therapeutics-where-do-we-stand-with-influenza-b-virus
#8
REVIEW
Jessica Tan, Guha Asthagiri Arunkumar, Florian Krammer
The development of a broadly protective or universal influenza virus vaccine is currently a public health priority worldwide. The vast majority of these efforts is exclusively focused on influenza A viruses. While influenza A viruses cause the majority of all influenza cases worldwide, influenza B viruses should not be ignored. Approximately 25% of all influenza cases are caused by influenza B viruses which circulate as two distinct B/Victoria/2/87-like and B/Yamagata/16/88-like lineages. In contrast to popular belief, influenza B cases frequently cause significant morbidity and mortality, especially in children...
April 17, 2018: Current Opinion in Immunology
https://www.readbyqxmd.com/read/29677653/three-amino-acid-substitutions-in-the-ns1-protein-change-the-virus-replication-of-h5n1-influenza-virus-in-human-cells
#9
Jing Li, Kun Zhang, Quanjiao Chen, Xiaoshuang Zhang, Yeping Sun, Yuhai Bi, Shuang Zhang, Jinyan Gu, Jiarong Li, Di Liu, Wenjun Liu, Jiyong Zhou
Influenza A viruses have sophisticated strategies to promote their own replication. Here, we found that three H5N1 influenza viruses display different replication patterns in human A549 and macrophage cells. The HN01 virus displayed poor replication compared to HN021 and JS01. In addition, the HN01 virus was unable to counteract the interferon response and block general gene expression. This capability was restored by three amino acid substitutions on the NS1 protein: K55E, K66E, and C133F, resulting in recovered binding to CPSF30 and decreased interferon response activity...
April 17, 2018: Virology
https://www.readbyqxmd.com/read/29677646/adjuvant-strategies-to-improve-vaccination-of-the-elderly-population
#10
REVIEW
Birgit Weinberger
Immunosenescence contributes to increased incidence and severity of many infections in old age and is responsible for impaired immunogenicity and efficacy of vaccines. Adjuvants are one strategy to enhance immunogenicity of vaccines. The oil-in-water emulsions MF59TM and AS03, as well as a virosomal vaccine have been licensed in seasonal or pandemic influenza vaccines and are/were used successfully in the elderly. AS01, a liposome-based adjuvant comprising two immunostimulants has recently been approved in a recombinant protein vaccine for older adults, which showed very high efficacy against herpes zoster in clinical trials...
April 17, 2018: Current Opinion in Pharmacology
https://www.readbyqxmd.com/read/29677385/identification-and-characterization-of-two-novel-c-type-lectins-from-the-larvae-of-housefly-musca-domestica-l
#11
Jing Zhou, Nai-Nai Fang, Ya Zheng, Kai-Yu Liu, Bin Mao, Li-Na Kong, Ya Chen, Hui Ai
Lectins and antimicrobial peptides (AMPs) are widely distributed in various insects and play crucial roles in primary host defense against pathogenic microorganisms. Two AMPs (cecropin and attacin) have been identified and characterized in the larvae of housefly. In this study, two novel C-type lectins (CTLs) were obtained from Musca domestica, while their agglutinating and antiviral properties were evaluated. Real-time PCR analysis showed that the mRNA levels of four immune genes (MdCTL1, MdCTL2, Cecropin, and Attacin) from M...
April 20, 2018: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/29677213/ifn-%C3%AE-and-micrornas-are-important-modulators-of-the-pulmonary-innate-immune-response-against-influenza-a-h1n2-infection-in-pigs
#12
Louise Brogaard, Lars E Larsen, Peter M H Heegaard, Christian Anthon, Jan Gorodkin, Ralf Dürrwald, Kerstin Skovgaard
The innate immune system is paramount in the response to and clearance of influenza A virus (IAV) infection in non-immune individuals. Known factors include type I and III interferons and antiviral pathogen recognition receptors, and the cascades of antiviral and pro- and anti-inflammatory gene expression they induce. MicroRNAs (miRNAs) are increasingly recognized to participate in post-transcriptional modulation of these responses, but the temporal dynamics of how these players of the antiviral innate immune response collaborate to combat infection remain poorly characterized...
2018: PloS One
https://www.readbyqxmd.com/read/29676537/recovery-of-pulmonary-functions-exercise-capacity-and-quality-of-life-after-pulmonary-rehabilitation-in-survivors-of-ards-due-to-severe-influenza-a-h1n1-pneumonitis
#13
Meng-Jer Hsieh, Wei-Juen Lee, Hsiu-Ying Cho, Meng-Fang Wu, Han-Chung Hu, Kuo-Chin Kao, Ning-Hung Chen, Ying-Huang Tsai, Chung-Chi Huang
BACKGROUND: Acute respiratory distress syndrome (ARDS) due to severe influenza A H1N1 pneumonitis would result in impaired pulmonary functions and health-related quality of life (HRQoL) after hospital discharge. OBJECTIVES: The recovery of pulmonary functions, exercise capacity and HRQoL in the survivors of ARDS due to 2009 pandemic influenza A H1N1 pneumonitis (H1N1-ARDS) were evaluated in a tertiary teaching hospital in the northern Taiwan between May 2010 and June 2011...
April 20, 2018: Influenza and Other Respiratory Viruses
https://www.readbyqxmd.com/read/29676104/-immunologic-mechanisms-of-yinhua-pinggan-granule-and-san-ao-decoction-against-influenza-virus-in-vivo
#14
Hai-Xia Du, Hui-Fen Zhou, Yu He, Jie-Hong Yang, Yi-Yu Lu, Yi-Chen Fan, Hai-Tong Wan
This paper aimed to investigate the effect of Yinhua Pinggan granule and San-ao decoction on the immunologic mechanisms of influenza viral pneumonia mice in vivo , in order to study the activity of the combined administration of different formulas on influenza A/H1N1 virus. The model of pneumonia was established in mice through nasal dropping influenza virus, and then divided randomly into five groups: normal control group, influenza virus model group, oseltamivir control group, Yinhua Pinggan granule group, and San-ao decoction group...
March 2018: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/29675804/lactobacillus-plantarum-displaying-conserved-m2e-and-ha2-fusion-antigens-induces-protection-against-influenza-virus-challenge
#15
Wen-Tao Yang, Gui-Lian Yang, Liang Zhao, Yu-Bei Jin, Yan-Long Jiang, Hai-Bin Huang, Chun-Wei Shi, Jian-Zhong Wang, Guan Wang, Yuan-Huan Kang, Chun-Feng Wang
Avian influenza virus (AIV) can infect poultry, mammals, and other hosts and causes enormous economic losses to the global poultry industry. In this study, to develop a novel and potent oral vaccine based on Lactobacillus plantarum (L. plantarum) for controlling the spread of AIV in the poultry industry, we constructed a recombinant L. plantarum strain displaying the 3M2e-HA2 protein of the influenza virus and determined the effect of N/pgsA'-3M2e-HA2 against AIV in chicks. We first confirmed that the 3M2e-HA2 fusion protein was expressed on the surface of L...
April 19, 2018: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29675418/comparative-epidemiology-of-highly-pathogenic-avian-influenza-virus-h5n1-and-h5n6-in-vietnamese-live-bird-markets-spatiotemporal-patterns-of-distribution-and-risk-factors
#16
Kate C Mellor, Anne Meyer, Doaa A Elkholly, Guillaume Fournié, Pham T Long, Ken Inui, Pawin Padungtod, Marius Gilbert, Scott H Newman, Timothée Vergne, Dirk U Pfeiffer, Kim B Stevens
Highly pathogenic avian influenza (HPAI) H5N1 virus has been circulating in Vietnam since 2003, whilst outbreaks of HPAI H5N6 virus are more recent, having only been reported since 2014. Although the spatial distribution of H5N1 outbreaks and risk factors for virus occurrence has been extensively studied, there have been no comparative studies for H5N6. Data collected through active surveillance of Vietnamese live bird markets (LBMs) between 2011 and 2015 were used to explore and compare the spatiotemporal distributions of H5N1- and H5N6-positive LBMs...
2018: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/29675400/simultaneous-detection-of-key-bacterial-pathogens-related-to-pneumonia-and-meningitis-using-multiplex-pcr-coupled-with-mass-spectrometry
#17
Chi Zhang, Leshan Xiu, Yan Xiao, Zhengde Xie, Lili Ren, Junping Peng
Pneumonia and meningitis continue to present an enormous public health burden and pose a major threat to young children. Among the causative organisms of pneumonia and meningitis, bacteria are the most common causes of serious disease and deaths. It is challenging to accurately and rapidly identify these agents. To solve this problem, we developed and validated a 12-plex PCR coupled with matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS) method (bacterial pathogen-mass spectrometry, BP-MS) that can be used to simultaneously screen for 11 key bacterial pathogens related to pneumonia and meningitis...
2018: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/29675174/a-modular-synthetic-route-to-size-defined-immunogenic-haemophilus-influenzae-b-antigens-is-key-to-the-identification-of-an-octasaccharide-lead-vaccine-candidate
#18
J Y Baek, A Geissner, D C K Rathwell, D Meierhofer, C L Pereira, P H Seeberger
The first glycoconjugate vaccine using isolated glycans was licensed to protect children from Haemophilus influenzae serotype b (Hib) infections. Subsequently, the first semisynthetic glycoconjugate vaccine using a mixture of antigens derived by polymerization targeted the same pathogen. Still, a detailed understanding concerning the correlation between oligosaccharide chain length and the immune response towards the polyribosyl-ribitol-phosphate (PRP) capsular polysaccharide that surrounds Hib remains elusive...
February 7, 2018: Chemical Science
https://www.readbyqxmd.com/read/29674167/neuraminidase-as-an-influenza-vaccine-antigen-a-low-hanging-fruit-ready-for-picking-to-improve-vaccine-effectiveness
#19
REVIEW
Maryna C Eichelberger, David M Morens, Jeffery K Taubenberger
Neuraminidase (NA) plays an essential role in influenza virus replication, facilitating multicycle infection predominantly by releasing virions from infected cells. NA-inhibiting antibodies provide resistance to disease and NA-specific antibodies contribute to vaccine efficacy. The primary reason NA vaccine content and immunogenicity was not routinely measured in the past, was the lack of suitable assays to quantify NA and NA-specific antibodies. These are now available and with recent appreciation of its contribution to immunity, NA content of seasonal and pandemic vaccines is being considered...
April 16, 2018: Current Opinion in Immunology
https://www.readbyqxmd.com/read/29673810/a-systematic-review-of-emerging-respiratory-viruses-at-the-hajj-and-possible-coinfection-with-streptococcus-pneumoniae
#20
REVIEW
Jaffar A Al-Tawfiq, Samir Benkouiten, Ziad A Memish
BACKGROUND: The annual Hajj to the Kingdom of Saudi Arabia attracts millions of pilgrims from around the world. International health community's attention goes towards this mass gathering and the possibility of the development of any respiratory tract infections due to the high risk of acquisition of respiratory viruses. METHOD: We searched MEDLINE/PubMed and Scopus databases for relevant papers describing the prevalence of respiratory viruses among Hajj pilgrims...
April 16, 2018: Travel Medicine and Infectious Disease
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