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Influenza microRNA

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https://www.readbyqxmd.com/read/27922126/viral-and-bacterial-co-infection-in-severe-pneumonia-triggers-innate-immune-responses-and-specifically-enhances-ip-10-a-translational-study
#1
Jonathan Hoffmann, Daniela Machado, Olivier Terrier, Stephane Pouzol, Mélina Messaoudi, Wilma Basualdo, Emilio E Espínola, Rosa M Guillen, Manuel Rosa-Calatrava, Valentina Picot, Thomas Bénet, Hubert Endtz, Graciela Russomando, Gláucia Paranhos-Baccalà
Mixed viral and bacterial infections are widely described in community-acquired pneumonia; however, the clinical implications of co-infection on the associated immunopathology remain poorly studied. In this study, microRNA, mRNA and cytokine/chemokine secretion profiling were investigated for human monocyte-derived macrophages infected in-vitro with Influenza virus A/H1N1 and/or Streptococcus pneumoniae. We observed that the in-vitro co-infection synergistically increased interferon-γ-induced protein-10 (CXCL10, IP-10) expression compared to the singly-infected cells conditions...
December 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27694730/the-microrna-let-7b-mediated-attenuated-strain-of-influenza-a-h1n1-virus-in-a-mouse-model
#2
Mingming Tan, Wenkui Sun, Chunlai Feng, Di Xia, Xiaoyue Shen, Yuan Ding, Zhicheng Liu, Zheng Xing, Xin Su, Yi Shi
INTRODUCTION: Evaluating the attenuation of influenza viruses in animal studies is important in developing safe and effective vaccines. This study aimed to demonstrate that the microRNA (miRNA)-let-7b-mediated attenuated influenza viruses (miRT-H1N1) are sufficiently attenuated and safe in mice. METHODOLOGY: The pathogenicity of the miRT-H1N1virus was investigated in a mouse model, evaluated with median lethal dose (LD50). The replicative dynamics of the miRT-H1N1, wild type (wt)-H1N1, and scramble (scbl)-H1N1 viruses in the lungs of infected mice were compared...
September 30, 2016: Journal of Infection in Developing Countries
https://www.readbyqxmd.com/read/27610823/microrna-34a-contributes-to-virus-mediated-apoptosis-through-binding-to-its-target-gene-bax-in-influenza-a-virus-infection
#3
Niannian Fan, Jiantao Wang
OBJECTIVE: Influenza A virus is a cytolytic virus that induces apoptosis in numerous cell types. However, molecular mechanism of cell apoptosis induced by influenza A virus is not well understood. The present study was aimed to investigate the molecular mechanism of miR-34a involved in influenza A virus induced apoptosis. METHODS: Firstly, microRNA array was used to select miRNAs involved in influenza A virus infection. Then, Luciferase reporter assay and western blot were carried to determine the target gene of miR-34a...
September 6, 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/27597967/identification-of-dietetically-absorbed-rapeseed-brassica-campestris-l-bee-pollen-micrornas-in-serum-of-mice
#4
Xuan Chen, Guan-Hai Dai, Ze-Ming Ren, Ye-Ling Tong, Feng Yang, Yong-Qiang Zhu
MicroRNAs (miRNAs) are a class of small noncoding RNA that, through mediating posttranscriptional gene regulation, play a critical role in nearly all biological processes. Over the last decade it has become apparent that plant miRNAs may serve as a novel functional component of food with therapeutic effects including anti-influenza and antitumor. Rapeseed bee pollen has good properties in enhancing immune function as well as preventing and treating disease. In this study, we identified the exogenous miRNAs from rapeseed bee pollen in mice blood using RNA-seq technology...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27448447/microrna-21-drives-severe-steroid-insensitive-experimental-asthma-by-amplifying-phosphoinositide-3-kinase-mediated-suppression-of-histone-deacetylase-2
#5
Richard Y Kim, Jay C Horvat, James W Pinkerton, Malcolm R Starkey, Ama T Essilfie, Jemma R Mayall, Prema M Nair, Nicole G Hansbro, Bernadette Jones, Tatt Jhong Haw, Krishna P Sunkara, Thi Hiep Nguyen, Andrew G Jarnicki, Simon Keely, Joerg Mattes, Ian M Adcock, Paul S Foster, Philip M Hansbro
BACKGROUND: Severe steroid-insensitive asthma is a substantial clinical problem. Effective treatments are urgently required, however, their development is hampered by a lack of understanding of the mechanisms of disease pathogenesis. Steroid-insensitive asthma is associated with respiratory tract infections and noneosinophilic endotypes, including neutrophilic forms of disease. However, steroid-insensitive patients with eosinophil-enriched inflammation have also been described. The mechanisms that underpin infection-induced, severe steroid-insensitive asthma can be elucidated by using mouse models of disease...
June 10, 2016: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/27322373/modulation-of-influenza-a-virus-replication-by-microrna-9-through-targeting-mcpip1
#6
Chunyan Dong, Xiaoning Sun, Zhenhong Guan, Maolin Zhang, Ming Duan
MicroRNAs (miRNAs), a family of small noncoding RNAs controlling translation and transcription of its target genes, play important roles in the regulation of various biological processes, including viral infection. Influenza A viruses (IAV) infection alters expression of cellular miRNAs, which in turn can modify the cellular environment to facilitate efficient virus replication. In this study, we showed that IAV infection significantly induced miR-9 expression in A549 cells, which occurred earlier than drastic expression of viral matrix (M) and nucleoprotein (NP) genes...
June 20, 2016: Journal of Medical Virology
https://www.readbyqxmd.com/read/27285980/mir674-inhibits-the-neuraminidase-stimulated-immune-response-on-dendritic-cells-via-down-regulated-mbnl3
#7
Jian Lin, Ya T Chen, Jing Xia, Qian Yang
Neuraminidase (NA), a structural protein of the H9N2 avian influenza virus (H9N2 AIV), can facilitate viral invasion of the upper airway by cleaving the sialic acid moieties on mucin. Dendritic cells (DCs) are major antigen-presenting cells whose immune functions, such as presenting antigens and activating lymphocytes, can be regulated by microRNAs. Here, we studied the molecular mechanism of miRNA-induced repression of immune responses in mouse DCs. First, we screened for and verified the miRNAs induced by NA...
June 6, 2016: Oncotarget
https://www.readbyqxmd.com/read/27166678/microrna-regulation-of-human-genes-essential-for-influenza-a-h7n9-replication
#8
Stefan Wolf, Weilin Wu, Cheryl Jones, Olivia Perwitasari, Suresh Mahalingam, Ralph A Tripp
Influenza A viruses are important pathogens of humans and animals. While seasonal influenza viruses infect humans every year, occasionally animal-origin viruses emerge to cause pandemics with significantly higher morbidity and mortality rates. In March 2013, the public health authorities of China reported three cases of laboratory confirmed human infection with avian influenza A (H7N9) virus, and subsequently there have been many cases reported across South East Asia and recently in North America. Most patients experience severe respiratory illness, and morbidity with mortality rates near 40%...
2016: PloS One
https://www.readbyqxmd.com/read/27093169/hemagglutinin-targeting-artificial-micrornas-expressed-by-adenovirus-protect-mice-from-different-clades-of-h5n1-infection
#9
Xinying Tang, Hongbo Zhang, Yufeng Song, Dongming Zhou, Jieru Wang
Influenza virus (IV) is a continuously evolving virus that widely spreads in humans and contributes to substantial morbidity and mortality. Re-emergence of human infection with avian influenza virus H5N1 poses extra challenge to IV control. Artificial microRNA (amiRNA)-mediated RNA interference has become a powerful antiviral approach due to its high specificity and rapid effect. Here, we designed several amiRNAs targeting the hemagglutinin gene of H5N1, a major determinant of pathogenicity. Expression and delivery efficiency were enhanced by presenting functional amiRNA with chimpanzee adenovirus serotype 68 (AdC68)...
April 19, 2016: Molecular Therapy. Nucleic Acids
https://www.readbyqxmd.com/read/27008411/micrornas-regulate-host-immune-response-and-pathogenesis-during-influenza-infection-in-rhesus-macaques
#10
Andrea Rivera, Tasha Barr, Maham Rais, Flora Engelmann, Ilhem Messaoudi
microRNAs (miRNAs) are small noncoding RNAs that are key regulators of biological processes, including the immune response to viral infections. Differential expression levels of cellular miRNAs and their predicted targets have been described in the lungs of H1N1-infected BALB/c mice, the lungs of H5N1 influenza-infected cynomolgus macaques, and in peripheral blood mononuclear cells (PBMCs) of critically ill patients infected with 2009 pandemic H1N1. However, a longitudinal analysis of changes in the expression of miRNAs and their targets during influenza infection and how they relate to viral replication and host response has yet to be carried out...
May 2016: Viral Immunology
https://www.readbyqxmd.com/read/26955707/-progress-in-micrornas-associated-with-major-avian-viruses
#11
REVIEW
Chaolai Man, Weitao Mu, Dongxue Zhao, Yang Chang
Recently, avian viral diseases have become one of the main models to study mechanisms of viral infections and pathogenesis. The study of regulatory relationships and mechanisms between viruses and microRNAs has also become the focus. In this review, we briefly summarize the general situations of microRNAs encoded by avian herpesviruses. Also, we analyze the regulatory relationships between tumorigenicity of avian herpesviruses and microRNAs. Additionally, the possible applications for prevention and treatment of viral diseases (such as infectious bursal disease, avian influenza and avian leucosis) using the regulatory mechanisms of microRNAs are also discussed...
September 2015: Sheng Wu Gong Cheng Xue Bao, Chinese Journal of Biotechnology
https://www.readbyqxmd.com/read/26938778/an-interferon-regulated-microrna-provides-broad-cell-intrinsic-antiviral-immunity-through-multihit-host-directed-targeting-of-the-sterol-pathway
#12
Kevin A Robertson, Wei Yuan Hsieh, Thorsten Forster, Mathieu Blanc, Hongjin Lu, Peter J Crick, Eylan Yutuc, Steven Watterson, Kimberly Martin, Samantha J Griffiths, Anton J Enright, Mami Yamamoto, Madapura M Pradeepa, Kimberly A Lennox, Mark A Behlke, Simon Talbot, Jürgen Haas, Lars Dölken, William J Griffiths, Yuqin Wang, Ana Angulo, Peter Ghazal
In invertebrates, small interfering RNAs are at the vanguard of cell-autonomous antiviral immunity. In contrast, antiviral mechanisms initiated by interferon (IFN) signaling predominate in mammals. Whilst mammalian IFN-induced miRNA are known to inhibit specific viruses, it is not known whether host-directed microRNAs, downstream of IFN-signaling, have a role in mediating broad antiviral resistance. By performing an integrative, systematic, global analysis of RNA turnover utilizing 4-thiouridine labeling of newly transcribed RNA and pri/pre-miRNA in IFN-activated macrophages, we identify a new post-transcriptional viral defense mechanism mediated by miR-342-5p...
March 2016: PLoS Biology
https://www.readbyqxmd.com/read/26928236/dna-as-tunable-adaptor-for-sirna-polyplex-stabilization-and-functionalization
#13
Philipp Heissig, Philipp M Klein, Philipp Hadwiger, Ernst Wagner
siRNA and microRNA are promising therapeutic agents, which are engaged in a natural mechanism called RNA interference that modulates gene expression posttranscriptionally. For intracellular delivery of such nucleic acid triggers, we use sequence-defined cationic polymers manufactured through solid phase chemistry. They consist of an oligoethanamino amide core for siRNA complexation and optional domains for nanoparticle shielding and cell targeting. Due to the small size of siRNA, electrostatic complexes with polycations are less stable, and consequently intracellular delivery is less efficient...
2016: Molecular Therapy. Nucleic Acids
https://www.readbyqxmd.com/read/26917988/identification-of-micrornas-in-throat-swab-as-the-biomarkers-for-diagnosis-of-influenza
#14
Fang Peng, Jianan He, Jacky Fong Chuen Loo, Jingyu Yao, Lei Shi, Chunxiao Liu, Chunzhong Zhao, Weidong Xie, Yonghong Shao, Siu Kai Kong, Dayong Gu
BACKGROUND: Influenza is a serious worldwide disease that captures global attention in the past few years after outbreaks. The recent discoveries of microRNA (miRNA) and its unique expression profile in influenza patients have offered a new method for early influenza diagnosis. The aim of this study was to examine the utility of miRNAs for the diagnosis of influenza. METHODS: Thirteen selected miRNAs were investigated with the hosts' throat swabs (25 H1N1, 20 H3N2, 20 influenza B and 21 healthy controls) by real-time quantitative polymerase chain reaction (RT-qPCR) using U6 snRNA as endogenous control for normalization, and receiver operating characteristic (ROC) curve/Area under curve (AUC) for analysis...
2016: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/26893019/late-regulation-of-immune-genes-and-micrornas-in-circulating-leukocytes-in-a-pig-model-of-influenza-a-h1n2-infection
#15
Louise Brogaard, Peter M H Heegaard, Lars E Larsen, Shila Mortensen, Michael Schlegel, Ralf Dürrwald, Kerstin Skovgaard
MicroRNAs (miRNAs) are a class of short regulatory RNA molecules which are implicated in modulating gene expression. Levels of circulating, cell-associated miRNAs in response to influenza A virus (IAV) infection has received limited attention so far. To further understand the temporal dynamics and biological implications of miRNA regulation in circulating leukocytes, we collected blood samples before and after (1, 3, and 14 days) IAV challenge of pigs. Differential expression of miRNAs and innate immune factor mRNA transcripts was analysed using RT-qPCR...
2016: Scientific Reports
https://www.readbyqxmd.com/read/26807508/impaired-antiviral-stress-granule-and-ifn-%C3%AE-enhanceosome-formation-enhances-susceptibility-to-influenza-infection-in-chronic-obstructive-pulmonary-disease-epithelium
#16
Alan C-Y Hsu, Kristy Parsons, Fatemeh Moheimani, Darryl A Knight, Philip M Hansbro, Takashi Fujita, Peter A Wark
Chronic obstructive pulmonary disease (COPD) is a serious lung disease that progressively worsens lung function. Those affected are highly susceptible to influenza virus infections that result in exacerbations with exaggerated symptoms with increased mortality. The mechanisms underpinning this increased susceptibility to infection in COPD are unclear. In this study, we show that primary bronchial epithelial cells (pBECs) from subjects with COPD have impaired induction of type I IFN (IFN-β) and lead to heightened viral replication after influenza viral infection...
July 2016: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/26682988/systems-analysis-of-immunity-to-influenza-vaccination-across-multiple-years-and-in-diverse-populations-reveals-shared-molecular-signatures
#17
Helder I Nakaya, Thomas Hagan, Sai S Duraisingham, Eva K Lee, Marcin Kwissa, Nadine Rouphael, Daniela Frasca, Merril Gersten, Aneesh K Mehta, Renaud Gaujoux, Gui-Mei Li, Shakti Gupta, Rafi Ahmed, Mark J Mulligan, Shai Shen-Orr, Bonnie B Blomberg, Shankar Subramaniam, Bali Pulendran
Systems approaches have been used to describe molecular signatures driving immunity to influenza vaccination in humans. Whether such signatures are similar across multiple seasons and in diverse populations is unknown. We applied systems approaches to study immune responses in young, elderly, and diabetic subjects vaccinated with the seasonal influenza vaccine across five consecutive seasons. Signatures of innate immunity and plasmablasts correlated with and predicted influenza antibody titers at 1 month after vaccination with >80% accuracy across multiple seasons but were not associated with the longevity of the response...
December 15, 2015: Immunity
https://www.readbyqxmd.com/read/26645583/the-microrna-mir-485-targets-host-and-influenza-virus-transcripts-to-regulate-antiviral-immunity-and-restrict-viral-replication
#18
Harshad Ingle, Sushil Kumar, Ashwin Ashok Raut, Anamika Mishra, Diwakar Dattatraya Kulkarni, Takeshi Kameyama, Akinori Takaoka, Shizuo Akira, Himanshu Kumar
MicroRNAs (miRNAs) are small noncoding RNAs that are responsible for dynamic changes in gene expression, and some regulate innate antiviral responses. Retinoic acid-inducible gene I (RIG-I) is a cytosolic sensor of viral RNA; RIG-I activation induces an antiviral immune response. We found that miR-485 of the host was produced in response to viral infection and targeted RIG-I mRNA for degradation, which led to suppression of the antiviral response and enhanced viral replication. Thus, inhibition of the expression of mir-485 markedly reduced the replication of Newcastle disease virus (NDV) and the H5N1 strain of influenza virus in mammalian cells...
December 8, 2015: Science Signaling
https://www.readbyqxmd.com/read/26602079/mir-302c-mediates-influenza-a-virus-induced-ifn%C3%AE-expression-by-targeting-nf-%C3%AE%C2%BAb-inducing-kinase
#19
COMPARATIVE STUDY
Shulin Gui, Xueyuan Chen, Mo Zhang, Fanpeng Zhao, Yushun Wan, Li Wang, Gang Xu, Li Zhou, Xin Yue, Ying Zhu, Shi Liu
Little is known about the role of microRNA during influenza A virus (IAV) infection. We observed that NIK 3'UTR luciferase activity was elevated during IAV infection. Further studies demonstrated that miR-302c reduced NIK expression, resulting in the reduction of IFNβ mRNA expression. We found that miR-302c prevented the translocation of NF-κB from the cytosol to the nucleus. Furthermore, IAV infection downregulated miR-302c expression, leading to the activation of IFNβ expression and the inhibition of viral replication...
December 21, 2015: FEBS Letters
https://www.readbyqxmd.com/read/26460926/pattern-recognition-receptor-mediated-downregulation-of-microrna-650-fine-tunes-mxa-expression-in-dendritic-cells-infected-with-influenza-a-virus
#20
Tica Pichulik, Elham Khatamzas, Xiao Liu, Oliver Brain, Magno Delmiro Garcia, Alasdair Leslie, Benedicte Danis, Alice Mayer, Dilair Baban, Jiannis Ragoussis, Alexander N R Weber, Alison Simmons
MicroRNAs are important posttranscriptional regulators of gene expression, which have been shown to fine-tune innate immune responses downstream of pattern recognition receptor (PRR) signaling. This study identifies miR-650 as a novel PRR-responsive microRNA that is downregulated upon stimulation of primary human monocyte-derived dendritic cells (MDDCs) with a variety of different microbe-associated molecular patterns. A comprehensive target search combining in silico analysis, transcriptional profiling, and reporter assays reveals that miR-650 regulates several well-known interferon-stimulated genes, including IFIT2 and MXA...
January 2016: European Journal of Immunology
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