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Overexpression of chicken IRF7 increased viral replication and programmed cell death to the avian influenza virus infection through TGF-beta/FoxO signaling axis in DF-1

ABSTRACT: To elucidate the functional role of chicken IRF7 against avian influenza virus (AIV) infection, we generated inducible IRF7 overexpression DF-1 cell lines that could fine control the IRF7 expression level and performed in vitro infection using low pathogenic AIVs (LPAIVs) followed by RNA-seq.

ORGANISM(S): Gallus gallus

PROVIDER: GSE115131 | GEO | 2018/06/01

REPOSITORIES: GEO

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Chicken IRF7 knockout by CRISPR-Cas9 in DF-1 and in vitro H6N2 infection followed by RNA-seq

Project description:To elucidate the functional role of chicken IRF7 against avian influenza virus (AIV) infection, we generated inducible IRF7 knockout DF-1 cell lines and performed in vitro infection using low pathogenic AIVs (LPAIVs) followed by RNA-seq.

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Genome-wide profiling of microRNAs revealing novel insights into mutual interactions mechanism between H9N2 avian influenza virus and avian dendritic cells

Project description:Background：Dendritic cells (DCs), have the most important antigen presenting ability and played an irreplaceable role in recognizing and clearing virus. Antiviral responses must rapidly defend against infection while minimizing inflammatory damage, but the mechanisms that regulate the magnitude of response within an infected cell are not well understood. MicroRNA, small non-coding RNAs, that can regulate dendritic cells to inhibit the infection and replication of avian influenza virus. Here, we global analyses how avian DCs response to H9N2 avian influenza virus (AIV) and provide a potential mechanism of how avian microRNA defending H9N2 AIV replication. Results： Here, we global analyses how avian DCs response to H9N2 avian influenza virus (AIV) and provide a potential mechanism of how avian microRNA defending H9N2 AIV replication. First, we found that both active and inactive H9N2 AIV enhance the ability of DCs to present antigens and activate T lymphocytes. Next, total microarray analyses suggested that H9N2 AIV stimulation involved in protein localization, nucleotide binding and leukocyte transendothelial migration and MAPK signal pathways. Moreover, we construct 551 transcription factor (TF)-microRNA-mRNA loops based on the above analyses. Furthermore, we found that HA fragment could not activate DCs, while truncated HA highly increased the immune function of DCs by activating ERK and STAT3 signal pathway. Last, our insight research not only gained that gga-miR1644 might target to MBNL2 to enhanced avian DCs in inhibiting virus replication, but also suggested that gga-miR6675 target to the NLS of PB1 to trigger the silencing of PB1 genes and lead to inhibition of H9N2 avian influenza viral replication. All together, our innovative research will shed new light on the roles of avian microRNA in evoking avian DCs and inhibiting virus replication, which will suggest new strategies to combat avian influenza virus.

2017-07-08 | GSE100916 | GEO

Overexpression of chicken IRF7 increased viral replication and programmed cell death to the avian influenza virus infection through TGF-beta/FoxO signaling axis in DF-1

Project description:Overexpression of chicken IRF7 increased viral replication and programmed cell death to the avian influenza virus infection through TGF-beta/FoxO signaling axis in DF-1

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A homeostasis hypothesis of avian influenza resistance in chickens

Project description:Avian influenza caused significant damages to the poultry industry, efforts have been made to reveal the disease mechanisms as well as mechanisms of disease resistance. Here, by investigating two chicken breeds with distinct responses to avian influenza virus (AIV), Leghorn GB2 and Fayoumi M43, we compared their differences in genome, methylation and transcriptome. Except for MX1 involved direct acting antiviral mechanism, we found that in both methylation and transcriptome levels the more AIV resistant breed Fayoumi showed less variations compared to White Leghorn after AIV challenging. Fayoumi also showed better consistency between the changes in methylation and changes in transcriptome level. Our results suggested a homeostasis hypothesis of avian influenza resistance, with Fayoumi better maintaining homeostasis both in epigenetic and gene expression levels.

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Overexpression of Chicken IRF7 Increased Viral Replication and Programmed Cell Death to the Avian Influenza Virus Infection Through TGF-Beta/FoxO Signaling Axis in DF-1.

Project description: Not available

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RNA-Seq profiling in two chicken cell lines, LMH and DF1 with different susceptibiltiy to H9N2 avian influenza virus

Project description:We utilize the natural cell line model (LMH and DF1) with different susceptibiltiy to H9N2 avian influenza virus to find out more and new potential key factors of influencing AIV infection and replication via a high-throughput RNA sequencing (RNA-seq).

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Project description:df

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Gene expression profile of chicken lung in response to Avian influenza virus challenge in broiler chickens

Project description:To determine the host response to AIV in chicken lungs, a whole chicken genome array was used to analyze RNA isolated from chicken lungs infected with AIV (4dpi) or medium control (NS). Dual-color, direct comparisons were carried between AIV infected and non-infected controls. Each comparison includes four biological replicates. There were 508 mRNAs (347 down-regulated) were differentially expressed following AIV infection. From the results, MX1, IL-8, IRF-7, TNFRS19 are identified as strong candidate genes involved in regulating the host response to AIV infection in the lungs of broiler chickens. Further gene specific knock-down assay is warranted to elucidate underlying mechanism of AIV infection regulation in the chicken. Dual-color, common reference comparisons were carried between AIV infected and non-infected controls. Four biological replicates, with dye swap labeling, were included in the comparisons. Background subtracted signal intensity were collected from 4 arrays and normalized before data analysis.

2012-06-06 | E-GEOD-38197 | biostudies-arrayexpress

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