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Influenza H1n1

Jing Tian, Xue Jiao, Xiaonan Wang, Jin Geng, Reizhe Wang, Ning Liu, Xinhua Gao, Noreen Griffin, Fengping Shan
The morbidity and mortality associated with influenza A virus infections, have stimulated the search for novel prophylactic and therapeutic drugs. The purpose of this study was to investigate the prophylactic and therapeutic effect of synthetic methionine enkephalin (MENK) on mice infected by A/PR/8/34 influenza virus (H1N1) in vivo. The results showed that MENK could exert both prophylactic and therapeutic influences on infected mice, significantly improve the survival rate, relieve acute lung injury and decrease cytokine (IFN-α, IFN-β, TNF-α, IL-6, and IL-1β) levels...
December 5, 2017: International Immunopharmacology
Rosana Leiva, Marta Barniol-Xicota, Sandra Codony, Tiziana Ginex, Evelien Vanderlinden, Marta Montes, Michael Caffrey, F Javier Luque, Lieve Naesens, Santiago Vazquez
Two series of easily accessible anilines were identified as inhibitors of influenza A virus subtype H1N1, and extensive chemical synthesis and analysis of the structure-activity relationship were performed. The compounds were shown to interfere with low pH-induced membrane fusion mediated by the H1 and H5 (group 1) hemagglutinin (HA) subtypes. A combination of virus resistance, HA interaction and molecular dynamics simulation studies elucidated the binding site of these aniline-based influenza fusion inhibitors, which significantly overlaps with the pocket occupied by some H3 HA-specific inhibitors, indicating the high relevance of this cavity for drug design...
December 8, 2017: Journal of Medicinal Chemistry
Jose Reyes Canche-Pech, Laura Conde-Ferraez, Marylin Puerto-Solis, Refugio Gonzalez-Losa, Pilar Granja-Pérez, Salha Villanueva-Jorge, Maria Chan-Gasca, Jesus Gómez-Carballo, Luisa López-Ochoa, Bertha Jiménez-Delgadillo, Iram Rodríguez-Sánchez, Jorge Ramírez-Prado, Guadalupe Ayora-Talavera
The 2012 and 2013 annual influenza epidemics in Mexico were characterized by presenting different seasonal patterns. In 2012 the A(H1N1)pdm09 virus caused a high incidence of influenza infections after a two-year period of low circulation; whereas the 2013 epidemic presented circulation of the A(H1N1)pdm09 virus throughout the year. We have characterized the molecular composition of the Hemagglutinin (HA) and Neuraminidase (NA) genes of the A(H1N1)pdm09 virus from both epidemic seasons, emphasizing the genetic characteristics of viruses isolated from Yucatan in Southern Mexico...
2017: PloS One
Kiyoko Iwatsuki-Horimoto, Noriko Nakajima, Yurie Ichiko, Yuko Sakai-Tagawa, Takeshi Noda, Hideki Hasegawa, Yoshihiro Kawaoka
Ferrets and mice are frequently used as animal models for influenza research. However, ferrets are demanding in terms of housing space and handling, whereas mice are not naturally susceptible to infection with human influenza A or B viruses. Therefore, prior adaptation of human viruses is required for their use in mice. In addition, there are no mouse-adapted variants of the recent H3N2 viruses, because these viruses do not replicate well in mice. In this study, we investigated the susceptibility of Syrian hamsters to influenza viruses with a view to using them as an alternative animal model to mice...
December 6, 2017: Journal of Virology
Shaden Q Qasrawi, Ali M Albarrak, Adel S Alharbi, Samar Nashwan, Aljohara S Almeneessier, Seithikurippu R Pandi-Perumal, Muslim M Alsaadi, Ahmed S BaHammam
To assess the number of Saudi patients diagnosed with narcolepsy in 2 tertiary centers before and after the introduction of the 2009 A(H1N1)pdm09 vaccine.  Methods: We started collecting data after the first international report of an association between the A(H1N1)pdm09 vaccine and narcolepsy between January 2010 and December 2016. All patients diagnosed with narcolepsy after 2009 were included and data were collected for 7 years to account for any possible delays in the diagnosis of narcolepsy.  Results: One-hundred and seventy-three patients with narcolepsy were identified...
December 2017: Saudi Medical Journal
A Möhl, L Gräfe, C Helmeke, D Ziehm, M Monazahian, H-M Irmscher, J Dreesman
Influenza vaccine effectiveness (VE) has to be estimated anew for every season to explore vaccines' protective effect in the population. We report VE estimates against laboratory-confirmed influenza A(H1N1)pdm09, A(H3N2) and influenza B among children aged 2-17 years, using test-negative design. Pooled data from two German federal states' surveillance systems for acute respiratory illness from week 40/2012 to 20/2016 was used, yielding a total of 10 627 specimens. Odds ratios and 95% confidence intervals (95% CIs) for the association between laboratory-confirmed influenza and vaccination status were calculated by multivariate logistic regression adjusting for age, sex, illness onset and federal state...
December 6, 2017: Epidemiology and Infection
Amitabh Singh, Anirban Mandal, Ankita Patel, Sataroopa Mishra
Autoimmune Haemolytic Anaemias (AIHAs) are rare in children. They can be either a primary disease or secondary to/triggered by a host of other clinical conditions. We present five interesting cases of paediatric AIHA associated with infections (viral, bacterial and atypical) and autoimmune diseases {Systemic Lupus Erythematosus (SLE) and Autoimmune Hepatitis (AIH)}. The H1N1 influenza associated AIHA responded to oseltamivir and Intravenous Immunoglobulin (IvIg) while the cases secondary to Mycoplasma pneumoniae and pneumococcal bacteraemia required only treatment of the primary infection...
September 2017: Journal of Clinical and Diagnostic Research: JCDR
Henning K Olberg, Geir Egil Eide, Rebecca J Cox, Åsne Jul-Larsen, Sarah Larteley Lartey, Christian A Vedeler, Kjell-Morten Myhr
BACKGROUND: We have previously shown that multiple sclerosis patients receiving immunomodulatory treatment have reduced seroprotection rates after influenza immunization. OBJECTIVES: To further investigate the influence of immunomodulatory therapies on the antibody response and seroprotection rates in patients immunized with seasonal influenza vaccine in 2012/2013 compared to healthy controls. METHODS: Ninety patients receiving fingolimod, glatiramer acetate, interferon beta-1a/1b, natalizumab or no therapy were compared to 62 healthy controls...
December 4, 2017: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
Boris M Hartmann, Randy A Albrecht, Elena Zaslavsky, German Nudelman, Hanna Pincas, Nada Marjanovic, Michael Schotsaert, Carles Martínez-Romero, Rafael Fenutria, Justin P Ingram, Irene Ramos, Ana Fernandez-Sesma, Siddharth Balachandran, Adolfo García-Sastre, Stuart C Sealfon
The risk of emerging pandemic influenza A viruses (IAVs) that approach the devastating 1918 strain motivates finding strain-specific host-pathogen mechanisms. During infection, dendritic cells (DC) mature into antigen-presenting cells that activate T cells, linking innate to adaptive immunity. DC infection with seasonal IAVs, but not with the 1918 and 2009 pandemic strains, induces global RNA degradation. Here, we show that DC infection with seasonal IAV causes immunogenic RIPK3-mediated cell death. Pandemic IAV suppresses this immunogenic DC cell death...
December 5, 2017: Nature Communications
Małgorzata Pomorska-Mól, Arkadiusz Dors, Krzysztof Kwit, Ewelina Czyżewska-Dors, Zygmunt Pejsak
BACKGROUND: Respiratory co-infections are important factor affecting the profitability of pigs production. Swine influenza virus (SIV) may predispose to secondary infection. Haemophilus parasuis (Hps) can be a primary pathogen or be associated with other pathogens such as SIV. To date, little is known about the effect of coinfection with SIV and Hps on the disease severity and inflammatory response and the role of Hps in the induction of pneumonia in the absence of other respiratory pathogens...
December 4, 2017: BMC Veterinary Research
Ndahwouh Talla Nzussouo, Jazmin Duque, Adebayo Abel Adedeji, Daouda Coulibaly, Samba Sow, Zekiba Tarnagda, Issaka Maman, Adamou Lagare, Sonia Makaya, Mohamed Brahim Elkory, Herve Kadjo Adje, Paul Alhassan Shilo, Boubou Tamboura, Assana Cisse, Kossi Badziklou, Halima Boubacar Maïnassara, Ahmed Ould Bara, Adama Mamby Keita, Thelma Williams, Ann Moen, Marc-Alain Widdowson, Meredith McMorrow
BACKGROUND: Over the last decade, capacity for influenza surveillance and research in West Africa has strengthened. Data from these surveillance systems showed influenza A(H1N1)pdm09 circulated in West Africa later than in other regions of the continent. METHODS: We contacted 11 West African countries to collect information about their influenza surveillance systems (number of sites, type of surveillance, sampling strategy, populations sampled, case definitions used, number of specimens collected and number of specimens positive for influenza viruses) for the time period January 2010 through December 2012...
December 4, 2017: BMC Infectious Diseases
Shokouh Makvandi-Nejad, Henry Laurenson-Schafer, LiLi Wang, Dannielle Wellington, Yan Zhao, Boquan Jin, Ling Qin, Kerry Kite, Hooman K Moghadam, Chaojun Song, Kevin Clark, Philip Hublitz, Alain R Townsend, Hao Wu, Andrew J McMichael, YongHong Zhang, Tao Dong
Interferon-induced transmembrane 3 (IFITM3) is known to restrict the entry of a range of enveloped viruses. The single nucleotide polymorphism rs12252-C within IFITM3 has been shown to be associated with severe influenza A virus infection. It has been suggested that rs12252-C results in expression of a truncated IFITM3 protein lacking the first 21 amino acids. By performing high-throughput RNA sequencing on primary dendritic cells and peripheral blood mononuclear cells isolated from pandemic H1N1 influenza and human immunodeficiency virus-1 (HIV-1) infected patients we show that full-length IFITM3 mRNA is dominantly expressed (>99%) across all rs12252 genotypes...
November 30, 2017: Journal of Infectious Diseases
S Kannan, P Kolandaivel
Oseltamivir (Tamiflu) is the most accepted antiviral drug that targets the neuraminidase (NA) protein to inhibit the viral release from the host cell. Few H1N1 influenza strains with the H274Y mutation creates drug-resistance to oseltamivir. In this study, we reported flavonoid cyanidin-3-sambubiocide (C3S) compound acts as a potential inhibitor against H274Y mutation. The drug-resistance mechanism and inhibitory activity of C3S and oseltamivir against wild type (WT) and H274Y mutant type (MT) have been studied and compared based on the results of molecular docking, molecular dynamics and quantum chemical methods...
December 3, 2017: Journal of Biomolecular Structure & Dynamics
Anagha Loharikar, Tiffany A Suragh, Noni E MacDonald, Madhava R Balakrishnan, Oleg Benes, Smaragda Lamprianou, Terri B Hyde, Michael M McNeil
BACKGROUND: Clusters of anxiety-related adverse events following immunization (AEFI) have been observed in several countries and have disrupted country immunization programs. We conducted a systematic literature review to characterize these clusters, to generate prevention and management guidance for countries. METHODS: We searched seven peer-reviewed databases for English language reports of anxiety-related AEFI clusters (≥2 persons) with pre-specified keywords across 4 categories: symptom term, cluster term, vaccine term, and cluster AEFI phenomenon term/phrase...
November 29, 2017: Vaccine
Feng Huang, Jingliang Chen, Junsong Zhang, Likai Tan, Gui Lu, Yongjie Luo, Ting Pan, Juanran Liang, Qianwen Li, Baohong Luo, Hui Zhang, Gen Lu
Although antiviral drugs are available for the treatment of influenza infection, it is an urgent requirement to develop new antiviral drugs regarding the emergence of drug-resistant viruses. The nucleoprotein (NP) is conserved among all influenza A viruses (IAVs) and has no cellular equivalent. Therefore, NP is an ideal target for the development of new IAV inhibitors. In this study, we identified a novel anti-influenza compound, ZBMD-1, from a library of 20,000 compounds using cell-based influenza A infection assays...
November 30, 2017: Journal of Cellular and Molecular Medicine
Wenqiang Sun, Jiaxin Li, Jiao Hu, Daxiu Jiang, Zhichuang Ge, Chaonan Xing, Xiaoquan Wang, Min Gu, Xiaowen Liu, Shunlin Hu, Xiufan Liu
H3 subtype avian influenza virus (AIV) poses a great threat to public health, and so investigating its epidemiology is of great importance. A novel reassortant H3N2 AIV strain was isolated from a live poultry market in eastern China. The strain's genes originated from H1N1, H3, and H7 AIVs. Thus, the genome information of the H3N2 isolate will help to investigate further the epidemiology of H3 subtype AIVs in China.
November 30, 2017: Genome Announcements
Huilin Ou, Wei Yao, Dongshan Yu, Tianhao Weng, Frederick X C Wang, Xiaoxin Wu, Haibo Wu, Linfang Cheng, Xiangyun Lu, Nanping Wu, Honglin Chen, Lanjuan Li, Hangping Yao
The influenza virus is a serious threat to public health worldwide. A novel avian influenza A (H7N9) virus with a mortality rate of approximately 30% has been identified as an unusually dangerous virus for humans by the World Health Organization. Pathogenic H7N9 continue to represent a public health concern, and several candidate vaccines are currently in development. We generated candidate H7N9 vaccine strains using reverse genetics, consisting of hemagglutinin and neuraminidase genes derived from a human H7N9 virus and the remaining genes from the PR8 (A/PuertoRico/8/34 (H1N1)) virus...
November 3, 2017: Oncotarget
Ang Li, Ping Li, Yanqiong Li, Wenfei Li
Pityriasis rosea is a papulosquamous skin disorder that occurs most commonly between the ages of 10 and 35 years. Recurrent pityriasis rosea is rare. We report a patient suffering from recurrent pityriasis rosea, whose etiology may be related to either vaccine-induced stimulation of the immune system, or some rare vaccine component(influenza A [H1N1] vaccine, hepatitis B vaccine). We believe that such a case is unique and it has not been reported previously. The patient was successfully treated with a combination of oral cetirizine, a topical steroid cream, and narrowband-ultraviolet B phototherapy...
November 28, 2017: Human Vaccines & Immunotherapeutics
Jang-Gi Choi, Young-Hee Jin, Heeeun Lee, Tae Woo Oh, Nam-Hui Yim, Won-Kyung Cho, Jin Yeul Ma
Influenza is an acute respiratory illness caused by the influenza A virus, which causes economic losses and social disruption mainly by increasing hospitalization and mortality rates among the elderly and people with chronic diseases. Influenza vaccines are the most effective means of preventing seasonal influenza, but can be completely ineffective if there is an antigenic mismatch between the seasonal vaccine virus and the virus circulating in the community. In addition, influenza viruses resistant to antiviral drugs are emerging worldwide...
2017: Frontiers in Immunology
Meret E Ricklin, Sylvie Python, Nathalie J Vielle, Daniel Brechbühl, Beatrice Zumkehr, Horst Posthaus, Gert Zimmer, Nicolas Ruggli, Artur Summerfield
Studies in the mouse model indicate that the nucleoprotein of influenza A virus represents an interesting vaccine antigen being well conserved across subtypes of influenza virus but still able to induce protective immune responses. Here we show that immunizations of pigs with vesicular stomatitis virus- and classical swine fever virus-derived replicon (VRP) particles expressing the nucleoprotein (NP) of H1N1 A/swine/Belzig/2/01 induced potent antibody and T-cell responses against influenza A virus. In contrast to a conventional whole inactivated virus vaccine, the VRP vaccines induced both NP-specific CD4 and CD8 T cells responses, including interferon-γ and tumor-necrosis-factor dual-secreting cell...
November 27, 2017: Scientific Reports
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