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https://www.readbyqxmd.com/read/29454522/genetic-and-subunit-vaccines-based-on-the-stem-domain-of-the-equine-influenza-hemagglutinin-provide-homosubtypic-protection-against-heterologous-strains
#1
Lorena Itatí Ibañez, Cecilia Andrea Caldevilla, Yesica Paredes Rojas, Nora Mattion
H3N8 influenza virus strains have been associated with infectious disease in equine populations throughout the world. Although current vaccines for equine influenza stimulate a protective humoral immune response against the surface glycoproteins, disease in vaccinated horses has been frequently reported, probably due to poor induction of cross-reactive antibodies against non-matching strains. This work describes the performance of a recombinant protein vaccine expressed in prokaryotic cells (ΔHAp) and of a genetic vaccine (ΔHAe), both based on the conserved stem region of influenza hemagglutinin (HA) derived from A/equine/Argentina/1/93 (H3N8) virus...
February 15, 2018: Vaccine
https://www.readbyqxmd.com/read/29453058/antigenic-and-genetic-evolution-of-contemporary-swine-h1-influenza-viruses-in-the-united-states
#2
Daniela S Rajao, Tavis K Anderson, Pravina Kitikoon, Jered Stratton, Nicola S Lewis, Amy L Vincent
Several lineages of influenza A viruses (IAV) currently circulate in North American pigs. Genetic diversity is further increased by transmission of IAV between swine and humans and subsequent evolution. Here, we characterized the genetic and antigenic evolution of contemporary swine H1N1 and H1N2 viruses representing clusters H1-α (1A.1), H1-β (1A.2), H1pdm (1A.3.3.2), H1-γ (1A.3.3.3), H1-δ1 (1B.2.2), and H1-δ2 (1B.2.1) currently circulating in pigs in the United States. The δ1-viruses diversified into two new genetic clades, H1-δ1a (1B...
February 13, 2018: Virology
https://www.readbyqxmd.com/read/29447284/influenza-interaction-with-cocirculating-pathogens-and-its-impact-on-surveillance-pathogenesis-and-epidemic-profile-a-key-role-for-mathematical-modelling
#3
REVIEW
Lulla Opatowski, Marc Baguelin, Rosalind M Eggo
Evidence is mounting that influenza virus interacts with other pathogens colonising or infecting the human respiratory tract. Taking into account interactions with other pathogens may be critical to determining the real influenza burden and the full impact of public health policies targeting influenza. This is particularly true for mathematical modelling studies, which have become critical in public health decision-making. Yet models usually focus on influenza virus acquisition and infection alone, thereby making broad oversimplifications of pathogen ecology...
February 2018: PLoS Pathogens
https://www.readbyqxmd.com/read/29426899/far-uvc-light-a-new-tool-to-control-the-spread-of-airborne-mediated-microbial-diseases
#4
David Welch, Manuela Buonanno, Veljko Grilj, Igor Shuryak, Connor Crickmore, Alan W Bigelow, Gerhard Randers-Pehrson, Gary W Johnson, David J Brenner
Airborne-mediated microbial diseases such as influenza and tuberculosis represent major public health challenges. A direct approach to prevent airborne transmission is inactivation of airborne pathogens, and the airborne antimicrobial potential of UVC ultraviolet light has long been established; however, its widespread use in public settings is limited because conventional UVC light sources are both carcinogenic and cataractogenic. By contrast, we have previously shown that far-UVC light (207-222 nm) efficiently inactivates bacteria without harm to exposed mammalian skin...
February 9, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29399575/challenges-of-influenza-a-viruses-in-humans-and-animals-and-current-animal-vaccines-as-an-effective-control-measure
#5
REVIEW
Sung J Yoo, Taeyong Kwon, Young S Lyoo
Influenza A viruses (IAVs) are genetically diverse and variable pathogens that share various hosts including human, swine, and domestic poultry. Interspecies and intercontinental viral spreads make the ecology of IAV more complex. Beside endemic IAV infections, human has been exposed to pandemic and zoonotic threats from avian and swine influenza viruses. Animal health also has been threatened by high pathogenic avian influenza viruses (in domestic poultry) and reverse zoonosis (in swine). Considering its dynamic interplay between species, prevention and control against IAV should be conducted effectively in both humans and animal sectors...
January 2018: Clinical and Experimental Vaccine Research
https://www.readbyqxmd.com/read/29398273/the-choice-of-linker-for-conjugating-r848-to-inactivated-influenza-virus-determines-the-stimulatory-capacity-for-innate-immune-cells
#6
Marlena M Westcott, Elene A Clemens, Beth C Holbrook, S Bruce King, Martha A Alexander-Miller
Inactivated influenza vaccines are not approved for use in infants less than 6 months of age due to poor immunogenicity in that population. While the live attenuated influenza vaccine has the potential to be more immunogenic, it is not an option for infants and other vulnerable populations, including the elderly and immunocompromised individuals due to safety concerns. In an effort to improve the immunogenicity of the inactivated vaccine for use in vulnerable populations, we have used an approach of chemically crosslinking the Toll-like receptor (TLR) 7/8 agonist R848 directly to virus particles...
February 2, 2018: Vaccine
https://www.readbyqxmd.com/read/29377916/vaccination-potential-of-b-and-t-epitope-enriched-np-and-m2-against-influenza-a-viruses-from-different-clades-and-hosts
#7
Irina Tutykhina, Ilias Esmagambetov, Alexander Bagaev, Alexey Pichugin, Andrey Lysenko, Dmitry Shcherbinin, Elena Sedova, Denis Logunov, Maxim Shmarov, Ravshan Ataullakhanov, Boris Naroditsky, Alexander Gintsburg
To avoid outbreaks of influenza virus epidemics and pandemics among human populations, modern medicine requires the development of new universal vaccines that are able to provide protection from a wide range of influenza A virus strains. In the course of development of a universal vaccine, it is necessary to consider that immunity must be generated even against viruses from different hosts because new human epidemic virus strains have their origins in viruses of birds and other animals. We have enriched conserved viral proteins-nucleoprotein (NP) and matrix protein 2 (M2)-by B and T-cell epitopes not only human origin but also swine and avian origin...
2018: PloS One
https://www.readbyqxmd.com/read/29366678/galectin-3-enhances-avian-h5n1-influenza-a-virus-induced-pulmonary-inflammation-by-promoting-nlrp3-inflammasome-activation
#8
Yu-Jung Chen, Sheng-Fan Wang, I-Chun Weng, Ming-Hsiang Hong, Tzu-Han Lo, Jia-Tsrong Jan, Li-Chung Hsu, Huan-Yuan Chen, Fu-Tong Liu
Highly pathogenic avian influenza A H5N1 virus causes pneumonia and acute respiratory distress syndrome in humans. Virus-induced excessive inflammatory response contributes to severe disease and high mortality rates. Galectin-3, a β-galactoside-binding protein widely distributed in immune and epithelial cells, regulates various immune functions and modulates microbial infections. Here we describe galectin-3 up-regulation in mouse lung tissue following challenges with the H5N1 influenza virus. We investigated the effects of endogenous galectin-3 on H5N1 infection and found that survival of galectin-3 knockout (Gal-3KO) mice was comparable to wild-type (WT) mice following infections...
January 20, 2018: American Journal of Pathology
https://www.readbyqxmd.com/read/29362240/evaluation-of-preexisting-anti-hemagglutinin-stalk-antibody-as-a-correlate-of-protection-in-a-healthy-volunteer-challenge-with-influenza-a-h1n1pdm-virus
#9
Jae-Keun Park, Alison Han, Lindsay Czajkowski, Susan Reed, Rani Athota, Tyler Bristol, Luz Angela Rosas, Adriana Cervantes-Medina, Jeffery K Taubenberger, Matthew J Memoli
Influenza virus hemagglutinin (HA) surface glycoprotein is currently the primary target of licensed influenza vaccines. Recently, broadly reactive antibodies that target the stalk region of the HA have become a major focus of current novel vaccine development. These antibodies have been observed in humans after natural infection with influenza A virus, but the data are limited. Using samples and data from the uniquely controlled setting of an influenza A/H1N1 virus human challenge study of healthy volunteers, we performed a secondary analysis that for the first time explores the role of anti-HA stalk antibody as a human correlate of protection...
January 23, 2018: MBio
https://www.readbyqxmd.com/read/29343428/development-and-pre-clinical-evaluation-in-the-swine-model-of-a-mucosal-vaccine-tablet-for-human-influenza-viruses-a-proof-of-concept-study
#10
V Busignies, G Simon, G Mollereau, O Bourry, V Mazel, M Rosa-Calatrava, P Tchoreloff
Liquid vaccine formulations present some disadvantages such as stability problems, cold chain requirement or administration by trained personnel. Vaccine formulated as tablets would present a wide range of progress such as an increase stability that would facilitate the administration, the distribution and the storage of vaccine formulations. This work investigates the possibility to develop a mucosal tablet vaccine for human influenza viruses. The tablets were tested in vitro for biological efficacy and stability and in vivo in swine as a model for influenza A virus immunity...
January 14, 2018: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/29336526/human-milk-oligosaccharides-as-promising-antivirals
#11
REVIEW
Vasily Morozov, Grant Hansman, Franz-Georg Hanisch, Horst Schroten, Clemens Kunz
Human milk oligosaccharides (HMOs) are diverse unconjugated carbohydrates that are highly abundant in human breast milk. These glycans are investigated in the context of exhibiting multiple functions in infant growth and development. They seem to provide protection against infectious diseases, including a number of poorly manageable viral infections. Although the potential mechanism of the HMO antiviral protection is rather broad, much of the current experimental work has focused on studying of HMO antiadhesive properties...
January 16, 2018: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/29325138/evidence-for-viral-interference-and-cross-reactive-protective-immunity-between-influenza-b-virus-lineages
#12
Karen L Laurie, William Horman, Louise A Carolan, Kok Fei Chan, Daniel Layton, Andrew Bean, Dhanasekaran Vijaykrishna, Patrick C Reading, James M McCaw, Ian G Barr
Background: Two influenza B virus lineages, B/Victoria and B/Yamagata, cocirculate in the human population. While the lineages are serologically distinct, cross-reactive responses to both lineages have been detected. Viral interference describes the situation whereby infection with one virus limits infection and replication of a second virus. We investigated the potential for viral interference between the influenza B virus lineages. Methods: Ferrets were infected and then challenged 3, 10, or 28 days later with pairs of influenza B/Victoria and B/Yamagata viruses...
January 6, 2018: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29310427/towards-the-application-of-human-defensins-as-antivirals
#13
REVIEW
Mee Sook Park, Jin Il Kim, Ilseob Lee, Sehee Park, Joon-Yong Bae, Man-Seong Park
Defensins are antimicrobial peptides that participate in the innate immunity of hosts. Humans constitutively and/or inducibly express α- and β-defensins, which are known for their antiviral and antibacterial activities. This review describes the application of human defensins. We discuss the extant experimental results, limited though they are, to consider the potential applicability of human defensins as antiviral agents. Given their antiviral effects, we propose that basic research be conducted on human defensins that focuses on RNA viruses, such as human immunodeficiency virus (HIV), influenza A virus (IAV), respiratory syncytial virus (RSV), and dengue virus (DENV), which are considered serious human pathogens but have posed huge challenges for vaccine development for different reasons...
January 9, 2018: Biomolecules & Therapeutics
https://www.readbyqxmd.com/read/29284528/virus-like-particles-vaccine-containing-clonorchis-sinensis-tegumental-protein-induces-partial-protection-against-clonorchis-sinensis-infection
#14
Dong-Hun Lee, Ah-Ra Kim, Su-Hwa Lee, Fu-Shi Quan
BACKGROUND: Human clonorchiasis, caused by the infection of Clonorchis sinensis, is one of the major health problems in Southeast Asia. However, vaccine efficacy against C. sinensis infection remains largely unknown. METHODS: In this study, for the first time, we generated virus-like particles (VLPs) vaccine containing the C. sinensis tegumental protein 22.3 kDa (CsTP 22.3) and the influenza matrix protein (M1) as a core protein, and investigated the vaccine efficacy in Sprague-Dawley rats...
December 29, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/29280974/harnessing-invariant-nkt-cells-to-improve-influenza-vaccines-a-pig-perspective
#15
REVIEW
Guan Yang, Jürgen A Richt, John P Driver
Invariant natural killer T (iNKT) cells are an "innate-like" T cell lineage that recognize glycolipid rather than peptide antigens by their semi-invariant T cell receptors. Because iNKT cells can stimulate an extensive array of immune responses, there is considerable interest in targeting these cells to enhance human vaccines against a wide range of microbial pathogens. However, long overlooked is the potential to harness iNKT cell antigens as vaccine adjuvants for domestic animal species that express the iNKT cell-CD1d system...
December 27, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29277629/patterns-and-correlates-of-cervical-cancer-screening-initiation-in-a-large-integrated-healthcare-system
#16
Tracy A Becerra-Culqui, Neal M Lonky, Qiaoling Chen, Chun R Chao
BACKGROUND: The latest 2012 United States Preventive Services Task Force cervical cancer screening guidelines recommended screening initiation at age 21 years. Little is known about the cervical cancer screening initiation practices in the community, and whether there are critical gaps with respect to adherence to current clinical guidelines. Despite an overall decline in cervical cancer incidence across women of all ages, the incidence rate has not declined among 24-25 year-olds between 2000 (2...
December 22, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/29276514/cross-protective-efficacy-of-influenza-virus-m2e-containing-virus-like-particles-is-superior-to-hemagglutinin-vaccines-and-variable-depending-on-the-genetic-backgrounds-of-mice
#17
Yu-Jin Kim, Young-Tae Lee, Min-Chul Kim, Yu-Na Lee, Ki-Hye Kim, Eun-Ju Ko, Jae-Min Song, Sang-Moo Kang
Influenza virus M2 extracellular domain (M2e) has been a target for developing cross-protective vaccines. However, the efficacy and immune correlates of M2e vaccination are poorly understood in the different host genetic backgrounds in comparison with influenza vaccines. We previously reported the cross-protective efficacy of virus-like particle (M2e5x VLP) vaccines containing heterologous tandem M2e repeats (M2e5x) derived from human, swine, and avian influenza viruses. In this study to gain better understanding of cross-protective influenza vaccines, we compared immunogenicity and efficacy of M2e5x VLP, H5 hemagglutinin VLP (HA VLP), and inactivated H3N2 virus (H3N2i) in wild-type strains of BALB/c and C57BL/6 mice, and CD4 and CD8 knockout (KO) mice...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29250437/heterologous-prime-boost-vaccination-with-h3n2-influenza-viruses-of-swine-favors-cross-clade-antibody-responses-and-protection
#18
Kristien Van Reeth, José Carlos Mancera Gracia, Ivan Trus, Lieve Sys, Gerwin Claes, Han Versnaeyen, Eric Cox, Florian Krammer, Yu Qiu
The emergence of multiple novel lineages of H1 and H3 influenza A viruses in swine has confounded control by inactivated vaccines. Because of substantial genetic and geographic heterogeneity among circulating swine influenza viruses, one vaccine strain per subtype cannot be efficacious against all of the current lineages. We have performed vaccination-challenge studies in pigs to examine whether priming and booster vaccinations with antigenically distinct H3N2 swine influenza viruses could broaden antibody responses and protection...
2017: NPJ Vaccines
https://www.readbyqxmd.com/read/29249542/conventional-influenza-vaccines-influence-the-performance-of-a-universal-influenza-vaccine-in-mice
#19
Janelle Rowell, Chia-Yun Lo, Graeme E Price, Julia A Misplon, Suzanne L Epstein, Mayra Garcia
Universal influenza vaccines are designed to protect against diverse strains of influenza virus. Preclinical testing of new vaccine candidates is usually done in naïve animals, despite intended use in the human population with its varied immune history including responses to previous vaccinations. As an approach more relevant to human use, we tested a candidate universal influenza vaccine in mice with a history of conventional vaccination. Female BALB/c mice were given two intramuscular doses of inactivated influenza vaccine (IIV) or diphtheria and tetanus toxoids vaccine (DT), one month apart...
December 14, 2017: Vaccine
https://www.readbyqxmd.com/read/29242836/vaccination-with-a-recombinant-h7-hemagglutinin-based-influenza-virus-vaccine-induces-broadly-reactive-antibodies-in-humans
#20
Daniel Stadlbauer, Arvind Rajabhathor, Fatima Amanat, Daniel Kaplan, Abusaleh Masud, John J Treanor, Ruvim Izikson, Manon M Cox, Raffael Nachbagauer, Florian Krammer
Human influenza virus infections with avian subtype H7N9 viruses are a major public health concern and have encouraged the development of effective H7 prepandemic vaccines. In this study, baseline and postvaccination serum samples of individuals aged 18 years and older who received a recombinant H7 hemagglutinin vaccine with and without an oil-in-water emulsion (SE) adjuvant were analyzed using a panel of serological assays. While only a small proportion of individuals seroconverted to H7N9 as measured by the conventional hemagglutination inhibition assay, our data show strong induction of anti-H7 hemagglutinin antibodies as measured by an enzyme-linked immunosorbent assay (ELISA)...
November 2017: MSphere
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