Genomic and Bioinformatic Characterization of Mouse Mast Cells (P815) Upon Different Influenza A Virus (H1N1, H5N1, and H7N2) Infections

Influenza A virus (IAV) is one of the segmented negative-stranded RNA virus, which brings a potentially serious threat to public health and animal husbandry. Mast cells, a kind of immune cells, play an important role in both inherent and adaptive immune response. Previous studies indicated that mast cells support the productive replication of H1N1, H5N1 and H7N2. To date, the distinct of molecular mechanism behind the pathogenesis in mast cells among three different viruses was poorly understood. In the present study, we investigated the more profound genomic profiles for the first time and describe the dynamic change of genomes regulated by different subtypes of IAV in mouse mast cells using microassays. Compared with any two of the three IAV-infected groups, much more differentially expressed genes (DEGs), cellular functions and signaling pathways were confirmd in H1N1 or H7N2 group, and H7N2 group showed the highest levels. However, few DEGs were detected as well as various cellular functions and signaling pathways were dramatically suppressed in H5N1 group. With an in-depth study on H1N1 and H7N2 group, we demonstrated the essential role of 5-HT signaling pathway and cGMP/PKG signaling pathway that were preferentially activated in P815 cells infected by H1N1 while crucial role of HIF-1 signaling pathway that were preferentially activated in P815 cells infected by H7N2 virus. Furthermore, RT-qPCR results also showed significantly increased mRNA of 5-HT and PKG in H1N1-inf...
Source: Frontiers in Genetics - Category: Genetics & Stem Cells Source Type: research

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Abstract Avian influenza virus (AIV) is an extraordinarily diverse pathogen that causes significant morbidity in domesticated poultry populations and threatens human life with looming pandemic potential. Controlling avian influenza in susceptible populations requires highly effective, economical and broadly reactive vaccines. Several AIV vaccines have proven insufficient despite their wide use, and better technologies are needed to improve their immunogenicity and broaden effectiveness. Previously, we developed a "mosaic" H5 subtype hemagglutinin (HA) AIV vaccine and demonstrated its broad protection aga...
Source: Vaccine - Category: Allergy & Immunology Authors: Tags: Vaccine Source Type: research
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Source: FEBS Letters - Category: Biochemistry Authors: Tags: Research Articles Source Type: research
Publication date: 16 May 2019Source: Cell, Volume 177, Issue 5Author(s): Sandhya Bangaru, Shanshan Lang, Michael Schotsaert, Hillary A. Vanderven, Xueyong Zhu, Nurgun Kose, Robin Bombardi, Jessica A. Finn, Stephen J. Kent, Pavlo Gilchuk, Iuliia Gilchuk, Hannah L. Turner, Adolfo García-Sastre, Sheng Li, Andrew B. Ward, Ian A. Wilson, James E. CroweSummaryHere, we describe the discovery of a naturally occurring human antibody (Ab), FluA-20, that recognizes a new site of vulnerability on the hemagglutinin (HA) head domain and reacts with most influenza A viruses. Structural characterization of FluA-20 with H1 and H3 he...
Source: Cell - Category: Cytology Source Type: research
This study focuses on design, synthesis and in vitro evaluation of inhibitory potency of two series of sialylmimetic that target an exosite ("150-cavity") adjacent to the active site of influenza neuraminidases from A/California/07/2009 (H1N1) pandemic strain and A/chicken/Nakorn-Patom/Thailand/CU-K2-2004 (H5N1). The structure-activity analysis as well as 3-D structure of the complex of parental compound with the pandemic neuraminidase p09N1 revealed high flexibility of the 150-cavity towards various modification of the neuraminidase inhibitors. Furthermore, our comparison of two methods for inhibition constant d...
Source: Bioorganic and Medicinal Chemistry - Category: Chemistry Authors: Tags: Bioorg Med Chem Source Type: research
In conclusion, the reported results highlight the importance of AIV attachment to trachea in many avian species. Finally, the importance of chickens and mallards in AIVs dynamics was illustrated by the abundant AIV attachment observed. Introduction Influenza A viruses (IAVs) are pathogens of global concern in both human and veterinary medicine (Webster et al., 1992; Stöhr, 2002; Olsen et al., 2006; Wiethoelter et al., 2015). Wild birds are well-described hosts of avian influenza viruses (AIVs) and longitudinal surveillance studies have demonstrated a plethora of low pathogenic AIVs (LPAIVs) circulating in wild...
Source: Frontiers in Microbiology - Category: Microbiology Source Type: research
María Maximina B. Moreno-Altamirano1*, Simon E. Kolstoe2 and Francisco Javier Sánchez-García1* 1Laboratorio de Inmunorregulación, Departamento de Inmunología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City, Mexico 2School of Health Sciences, University of Portsmouth, Portsmouth, United Kingdom Over the last decade, there has been significant advances in the understanding of the cross-talk between metabolism and immune responses. It is now evident that immune cell effector function strongly depends on the metabolic pathway in w...
Source: Frontiers in cellular and infection microbiology - Category: Microbiology Source Type: research
Conclusions: Human challenge studies and systems biology approaches are important tools that should be used in concert to advance our understanding of influenza infection and provide targets for novel therapeutics and immunizations. Introduction Although influenza virus was recognized as an important pathogen over a century ago, influenza continues to cause a significant burden of disease. In the United States alone, it's estimated that in the 2017–2018 season there were 959,000 hospitalizations related to influenza illness, and 79,400 deaths (CDC, 2018). Worldwide, WHO estimates that annual influenza...
Source: Frontiers in cellular and infection microbiology - Category: Microbiology Source Type: research
Jennifer M. Rudd1, Sivasami Pulavendran1, Harshini K. Ashar1, Jerry W. Ritchey1, Timothy A. Snider1, Jerry R. Malayer1, Montelongo Marie1, Vincent T. K. Chow2 and Teluguakula Narasaraju1* 1Center for Veterinary Health Sciences, Oklahoma State University, Stillwater, OK, United States2Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, National University Health System, Singapore, Singapore Exaggerated host innate immune responses have been implicated in severe influenza pneumonia. We have previously demonstrated that excessive neutrophils recruited during in...
Source: Frontiers in cellular and infection microbiology - Category: Microbiology Source Type: research
Conclusions: H1N1 and H7N2 viruses could result in a variety of DEGs in mast cells and activate various cellular functions and signaling pathways while H5N1 virus cause the few DEGs in mast cells as well as suppression of cellular functions and signaling pathways. Furthermore, 5-HT signaling pathway and cGMP/PKG signaling pathway were preferentially activated in P815 cells infected by H1N1 whi le HIF-1 signaling pathway were preferentially activated in P815 cells infected by H7N2 virus. In addition, exosomes were also preferentially secreted from H1N1-infected or H7N2-infected P815 cells that are potentially pivotal in inn...
Source: GEO: Gene Expression Omnibus - Category: Genetics & Stem Cells Tags: Expression profiling by array Mus musculus Source Type: research
The objective of this preclinical study was to assess the protective immunity induced by immunization with group 1 hemagglutinin-specific influenza virus vaccines based on chimeric hemagglutinins (cHAs) in a ferret model of influenza. The experimental designs and immunization strategies are summarized in Figure 1. Since most human adults have a primed repertoire of B cells with specificity to the HA stalk domain (19, 30), we included an influenza B virus expressing cH9/1 (B-cH9/1) to mimic pre-existing HA stalk immunity. We then compared the ability of our sequential immunization strategies to boost antibody titers against...
Source: Frontiers in Immunology - Category: Allergy & Immunology Source Type: research
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