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https://www.readbyqxmd.com/read/28332900/fc-or-not-fc-that-is-the-question-antibody-fc-receptor-interactions-are-key-to-universal-influenza-vaccine-design
#1
Sinthujan Jegaskanda, Hillary A Vanderven, Adam K Wheatley, Stephen J Kent
A universal vaccine that provides long-lasting protection from both epidemic and pandemic influenza viruses remains the "holy grail" of influenza vaccine research. Though virus neutralization assays are the current benchmark of measuring vaccine effectiveness, it is clear that Fc-receptor functions can drastically improve the effectiveness of antibodies and vaccines in vivo. Antibodies that kill virus-infected cells and/or elicit an antiviral environment, termed antibody-dependent cellular cytotoxicity (ADCC)-mediating antibodies, provide a link between the innate and adaptive immune response...
March 23, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28332646/the-role-of-animal-reservoirs-in-social-environmental-landscapes-remarks-on-the-control-of-avian-influenza-and-preparedness-for-pandemics
#2
M P Ortiz-Rodríguez, G C Ramírez-Nieto, L C Villamil-Jiménez
Influenza viruses are well known for their ability to infect and cause disease in a broad range of hosts. Modern advances in reverse genetics have enabled scientists to probe the mutations that allow influenza viruses to perform host switching. Despite this detailed understanding of the molecular modifications that allow host switching and adaptation, there is a gap in knowledge regarding the factors external to the virus and their interactions that act as triggers leading to a pandemic. Studies on the ecology of zoonotic pathogens should be the new paradigm for understanding not only influenza viruses but any other infectious disease that can be a threat to animal and human health...
December 2016: Revue Scientifique et Technique
https://www.readbyqxmd.com/read/28331286/neutralizing-activities-against-seasonal-influenza-viruses-in-human-intravenous-immunoglobulin
#3
Hiroyuki Onodera, Takeru Urayama, Kazue Hirota, Kazuhiro Maeda, Ritsuko Kubota-Koketsu, Kazuo Takahashi, Katsuro Hagiwara, Yoshinobu Okuno, Kazuyoshi Ikuta, Mikihiro Yunoki
Influenza viruses A/H1N1, A/H3N2, and B are known seasonal viruses that undergo annual mutation. Intravenous immunoglobulin (IVIG) contains anti-seasonal influenza virus globulins. Although the virus-neutralizing (VN) titer is an indicator of protective antibodies, changes in this titer over extended time periods have yet to be examined. In this study, variations in hemagglutination inhibition (HI) and VN titers against seasonal influenza viruses in IVIG lots over extended time periods were examined. In addition, the importance of monitoring the reactivity of IVIG against seasonal influenza viruses with varying antigenicity was evaluated...
2017: Biologics: Targets & Therapy
https://www.readbyqxmd.com/read/28331085/heterologous-packaging-signals-on-ha-but-not-na-or-ns-limit-influenza-a-virus-reassortment
#4
Maria C White, John Steel, Anice C Lowen
Influenza A virus (IAV) RNA packaging signals serve to direct the incorporation of IAV gene segments into virus particles, and this process is thought to be mediated by segment-segment interactions. These packaging signals are segment- and strain-specific, and as such, they have the potential to impact reassortment outcomes between different IAV strains. Our study aimed to quantify the impact of packaging signal mismatch on IAV reassortment using the human seasonal influenza A/Panama/2007/99 (H3N2) and pandemic influenza A/Netherlands/602/2009 (H1N1) viruses...
March 22, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28328990/gut-microbiome-analysis-of-type-2-diabetic-patients-from-the-chinese-minority-ethnic-groups-the-uygurs-and-kazaks
#5
Ye Wang, Xin Luo, Xinmin Mao, Yicun Tao, Xinjian Ran, Haixia Zhao, Jianhui Xiong, Linlin Li
The gut microbiome may have an important influence on the development of diabetes mellitus type 2 (DM2). To better understand the DM2 pandemic in ethnic minority groups in China, we investigated and compared the composition and richness of the gut microbiota of healthy, normal glucose tolerant (NGT) individuals and DM2 patients from two ethnic minority groups in Xinjiang, northwest China, the Uygurs and Kazaks. The conserved V6 region of the 16S rRNA gene was amplified by PCR from the isolated DNA. The amplified DNA was sequenced and analyzed...
2017: PloS One
https://www.readbyqxmd.com/read/28326652/paediatric-type-2-diabetes-in-china-pandemic-progression-and-potential-solutions
#6
REVIEW
Qing Ye, Jun-Fen Fu
China is gradually taking its place as one of the world's economic giants and concurrently learning to cope with the burden of diseases that are more common in the developed world, such as paediatric type 2 diabetes mellitus. The prevalence of type 2 diabetes has been recently observed among children and adolescents in China; hence, there is a lack of information about the incidence, prevalence, pathogenesis, and pathophysiology of the disease. Diagnosis, treatment, and management have been standardized to a large degree, but there is still a need for data regarding optimal management protocols and how to achieve the best control over current state of the disease...
March 22, 2017: Pediatric Diabetes
https://www.readbyqxmd.com/read/28325922/variability-in-h9n2-haemagglutinin-receptor-binding-preference-and-the-ph-of-fusion
#7
Thomas P Peacock, Donald J Benton, Jean-Remy Sadeyen, Pengxiang Chang, Joshua E Sealy, Juliet E Bryant, Stephen R Martin, Holly Shelton, John W McCauley, Wendy S Barclay, Munir Iqbal
H9N2 avian influenza viruses are primarily a disease of poultry; however, they occasionally infect humans and are considered a potential pandemic threat. Little work has been performed to assess the intrinsic biochemical properties related to zoonotic potential of H9N2 viruses. The objective of this study, therefore, was to investigate H9N2 haemagglutinins (HAs) using two well-known correlates for human adaption: receptor-binding avidity and pH of fusion. Receptor binding was characterized using bio-layer interferometry to measure virus binding to human and avian-like receptor analogues and the pH of fusion was assayed by syncytium formation in virus-infected cells at different pHs...
March 22, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28325769/analysis-of-anti-influenza-virus-neuraminidase-antibodies-in-children-adults-and-the-elderly-by-elisa-and-enzyme-inhibition-evidence-for-original-antigenic-sin
#8
Madhusudan Rajendran, Raffael Nachbagauer, Megan E Ermler, Paul Bunduc, Fatima Amanat, Ruvim Izikson, Manon Cox, Peter Palese, Maryna Eichelberger, Florian Krammer
Antibody responses to influenza virus hemagglutinin provide protection against infection and are well studied. Less is known about the human antibody responses to the second surface glycoprotein, neuraminidase. Here, we assessed human antibody reactivity to a panel of N1, N2, and influenza B virus neuraminidases in different age groups, including children, adults, and the elderly. Using enzyme-linked immunosorbent assays (ELISA), we determined the breadth, magnitude, and isotype distribution of neuraminidase antibody responses to historic, current, and avian strains, as well as to recent isolates to which these individuals have not been exposed...
March 21, 2017: MBio
https://www.readbyqxmd.com/read/28325625/-serological-detection-of-brucella-suis-influenza-virus-and-aujeszky-s-disease-virus-in-backyard-and-small-swine-holders-in-argentina
#9
Marina Dibarbora, Javier A Cappuccio, María N Aznar, Fernando A Bessone, Hernán Piscitelli, Ariel J Pereda, Daniel R Pérez
Farmers raising less than 100 sows represent more than 99% of swine producers in Argentina, although little is known about their sanitary status and productive characteristics in the country. Sanitary and productive information was obtained. Furthermore, samples for serological studies were taken to detect antibodies against Brucella suis (Bs), Aujeszky's disease virus (AV) and influenza virus (IV) in 68 backyard and small producers with less than 100 sows located in the north, central and south regions of Argentina...
March 18, 2017: Revista Argentina de Microbiología
https://www.readbyqxmd.com/read/28325494/modelling-h5n1-in-bangladesh-across-spatial-scales-model-complexity-and-zoonotic-transmission-risk
#10
Edward M Hill, Thomas House, Madhur S Dhingra, Wantanee Kalpravidh, Subhash Morzaria, Muzaffar G Osmani, Mat Yamage, Xiangming Xiao, Marius Gilbert, Michael J Tildesley
Highly pathogenic avian influenza H5N1 remains a persistent public health threat, capable of causing infection in humans with a high mortality rate while simultaneously negatively impacting the livestock industry. A central question is to determine regions that are likely sources of newly emerging influenza strains with pandemic causing potential. A suitable candidate is Bangladesh, being one of the most densely populated countries in the world and having an intensifying farming system. It is therefore vital to establish the key factors, specific to Bangladesh, that enable both continued transmission within poultry and spillover across the human-animal interface...
February 21, 2017: Epidemics
https://www.readbyqxmd.com/read/28322691/discussion-of-average-versus-extreme-case-severity-in-pandemic-risk-communications
#11
Brian J Zikmund-Fisher, Aaron M Scherer, Megan Knaus, Enny Das, Angela Fagerlin
To investigate determinants of the public's perceptions of disease threat, in 2015 we conducted a randomized survey experiment in the Netherlands. Adults who read a mock news article describing average +or extreme outcomes from a hypothetical influenza pandemic were more influenced by average than by extreme case information. Presenting both types of information simultaneously appeared counterproductive.
April 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28322289/poly-%C3%AE-glutamic-acid-chitosan-nanogel-greatly-enhances-the-efficacy-and-heterosubtypic-cross-reactivity-of-h1n1-pandemic-influenza-vaccine
#12
Jihyun Yang, Sang-Mu Shim, Thi Quyen Nguyen, Eun-Ha Kim, Kwang Kim, Yong Taik Lim, Moon-Hee Sung, Richard Webby, Haryoung Poo
In 2009, the global outbreak of an influenza pandemic emphasized the need for an effective vaccine adjuvant. In this study, we examined the efficacy of poly-γ-glutamic acid/chitosan (PC) nanogel as an adjuvant for the influenza vaccine. PC nanogel significantly enhanced antigen-specific cross-presentation and cytotoxic T lymphocyte (CTL) activity. Compared with alum, the protective efficacy of the pandemic H1N1 influenza (pH1N1) vaccine was substantially increased by PC nanogel, with increased hemagglutination-inhibition titers, CTL activity, and earlier virus clearance after homologous and heterosubtypic [A/Philippines/2/82 (H3N2)] virus challenges...
March 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28321029/influenza-a-virus-infection-in-japanese-wild-boars-sus-scrofa-leucomystax
#13
Hiroshi Shimoda, Dung VAN Nguyen, Kenzo Yonemitsu, Shohei Minami, Nao Nagata, Nanami Hara, Ryusei Kuwata, Shin Murakami, Yuuji Kodera, Tsutomu Takeda, Yasuhiro Yoshikawa, Taisuke Horimoto, Ken Maeda
Serum samples were collected from 385 wild boars between 2010 and 2013 to examine the seroprevalence of influenza A virus (IAV) in Japan. Antibodies against IAV were identified using a commercial kit in 13 wild boars (3.4%). To identify the serotypes, positive sera were examined by virus-neutralization test using representative serotypes and strains. Three wild boars in Yamaguchi and four in Tochigi showed the highest antibody titers against the pandemic H1N1 2009 virus and classical swine H1N1 virus strains, respectively...
March 19, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/28320938/effectiveness-of-unaids-targets-and-hiv-vaccination-across-127-countries
#14
Jan Medlock, Abhishek Pandey, Alyssa S Parpia, Amber Tang, Laura A Skrip, Alison P Galvani
The HIV pandemic continues to impose enormous morbidity, mortality, and economic burdens across the globe. Simultaneously, innovations in antiretroviral therapy, diagnostic approaches, and vaccine development are providing novel tools for treatment-as-prevention and prophylaxis. We developed a mathematical model to evaluate the added benefit of an HIV vaccine in the context of goals to increase rates of diagnosis, treatment, and viral suppression in 127 countries. Under status quo interventions, we predict a median of 49 million [first and third quartiles 44M, 58M] incident cases globally from 2015 to 2035...
March 20, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28317481/gut-microbiota-a-new-marker-of-cardiovascular-disease
#15
Antonio Garcia-Rios, Jose David Torres-Peña, Francisco Perez-Jimenez, Pablo Perez-Martinez
Cardiovascular disease (CVD) continues to be the major cause of death in the developed countries. Moreover, the cardiovascular risk factors leading towards the development of CVD, mainly type 2 diabetes and obesity, are on the rise. The current preventive and therapeutic management, centred on the control of traditional risk factors, is clearly not enough to stop this pandemic. Therefore, the search for new biomarkers in CVD is a priority in most clinical research programs. Currently, interest in gut microbiota has peaked due to its association with cardiovascular and non-cardiovascular diseases...
March 17, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28315708/2016-international-meeting-of-the-global-virus-network
#16
REVIEW
Ramesh Akkina, Heinz Ellerbrok, William Hall, Hideki Hasegawa, Yasushi Kawaguchi, Harold Kleanthous, Edward McSweegan, Natalia Mercer, Victor Romanowski, Hirofumi Sawa, Anders Vahlne
The Global Virus Network (GVN) was established in 2011 in order to strengthen research and responses to current viral causes of human disease and to prepare against new viral pandemic threats. There are now 38 GVN Centers of Excellence and 6 Affiliate laboratories in 24 countries. GVN scientists meet annually to learn about each other's current research, address collaborative priorities and plan future programs. The 2016 meeting was held from October 23-25 in Hokkaido, Japan, in partnership with the Japanese Society for Virology, the National Institute of Infectious Diseases of Japan and the Research Center for Zoonosis Control of Hokkaido University...
March 16, 2017: Antiviral Research
https://www.readbyqxmd.com/read/28314561/dna-vaccine-encoding-middle-east-respiratory-syndrome-coronavirus-s1-protein-induces-protective-immune-responses-in-mice
#17
Hang Chi, Xuexing Zheng, Xiwen Wang, Chong Wang, Hualei Wang, Weiwei Gai, Stanley Perlman, Songtao Yang, Jincun Zhao, Xianzhu Xia
The Middle East respiratory syndrome coronavirus (MERS-CoV), is an emerging pathogen that continues to cause outbreaks in the Arabian peninsula and in travelers from this region, raising the concern that a global pandemic could occur. Here, we show that a DNA vaccine encoding the first 725 amino acids (S1) of MERS-CoV spike (S) protein induces antigen-specific humoral and cellular immune responses in mice. With three immunizations, high titers of neutralizing antibodies (up to 1: 10(4)) were generated without adjuvant...
March 14, 2017: Vaccine
https://www.readbyqxmd.com/read/28302409/effectiveness-of-2009-pandemic-influenza-a-h1n1-vaccines-a-systematic-review-and-meta-analysis
#18
REVIEW
Louise E Lansbury, Sherie Smith, Walter Beyer, Emina Karamehic, Eva Pasic-Juhas, Hana Sikira, Ana Mateus, Hitoshi Oshitani, Hongxin Zhao, Charles R Beck, Jonathan S Nguyen-Van-Tam
BACKGROUND: The clinical effectiveness of monovalent influenza A(H1N1)pdm09 vaccines has not been comprehensively summarised. We undertook a systematic review and meta-analysis to assess vaccine effectiveness (VE) for adjuvanted and unadjuvanted vaccines. METHODS: We searched healthcare databases and grey literature from 11 June 2009 to 12 November 2014. Two researchers independently assessed titles and abstracts to identify studies for full review. Random effects meta-analyses estimated the pooled effect size of vaccination compared to placebo or no vaccination for crude and adjusted odds ratios (OR) to prevent laboratory confirmed influenza illness (LCI) and related hospitalization...
March 14, 2017: Vaccine
https://www.readbyqxmd.com/read/28302408/narcolepsy-and-hypersomnia-in-norwegian-children-and-young-adults-following-the-influenza-a-h1n1-2009-pandemic
#19
Lill Trogstad, Inger Johanne Bakken, Nina Gunnes, Sara Ghaderi, Camilla Stoltenberg, Per Magnus, Siri E Håberg
BACKGROUND: Associations between influenza infection and sleep disorders are poorly studied. We investigated if pandemic influenza infection or vaccination with Pandemrix in 2009/2010 was associated with narcolepsy or hypersomnia in children and young adults. METHODS: We followed the Norwegian population under age 30 from January 2008 through December 2012 by linking national health registry data. Narcolepsy diagnoses were validated using hospital records. Risks of narcolepsy or hypersomnia were estimated as adjusted hazard ratios (HRs) in Cox regression models with influenza infection and vaccination as time-dependent exposures...
March 13, 2017: Vaccine
https://www.readbyqxmd.com/read/28302313/influenza
#20
REVIEW
Catharine Paules, Kanta Subbarao
Influenza is an acute respiratory illness, caused by influenza A, B, and C viruses, that occurs in local outbreaks or seasonal epidemics. Clinical illness follows a short incubation period and presentation ranges from asymptomatic to fulminant, depending on the characteristics of both the virus and the individual host. Influenza A viruses can also cause sporadic infections or spread worldwide in a pandemic when novel strains emerge in the human population from an animal host. New approaches to influenza prevention and treatment for management of both seasonal influenza epidemics and pandemics are desirable...
March 10, 2017: Lancet
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