Project description:We used a chicken immune-targeted gene array to analyse the differences in gene expression in the bursa of Fabricius from genetically resistant and susceptible animals infected with Infectious Bursal Disease Virus (IBDV).
Project description:Background: Avian infectious bursal disease virus (IBDV) is a major poultry disease which leads to significant losses of poultry industry. Dendritic cells (DCs), the only bridge communicated the innate and acquired immunity, have the most important antigen presenting ability and can significantly influence the pathogenicity of viruses. To understand the interaction between IBDV and DCs, microarray was used to analyze the response of DCs infected by IBDV. Results: Results showed that IBDV infection induced 479 up-regulated and 466 down-regulated mRNAs in chicken DCs. GO terms analysis suggested that transcription from RNA polymerase II promoter and RNA biosynthetic process were mainly enriched, whilst pathway analyses suggested that oxidative phosphorylation, T cell receptor and IL-17 signaling pathway might activated by IBDV infection. Moreover, we detected the microRNA (miRNA) and long non-coding RNA (lncRNA) alterations in IBDV-infected chicken DCs. Results identified 18 significant up- or down- regulated miRNAs and 441 significant up- or down-regulated lncRNAs in IBDV-stimulated DCs. Furthermore, we constructed 42 TF (transcription factors)-miRNA-mRNA interactions involving 1 TF, 3 miRNAs and 42 mRNAs in IBDV-stimulated DCs. Finally, we predicted the target genes of different expressed lncRNAs and constructed lncRNA-mRNA regulatory networks. Conclusions: Altogether, our research suggested a mechanism to explain how IBDV infection triggered an effective immune response in chicken DCs.
Project description:The spontaneously immortalised chicken DF-1 cell line is rapidly replacing its progenitor primary chicken embryo fibroblasts (CEF) in studies on avian viruses but no comprehensive study has as yet been reported comparing their immune phenotype. We conducted microarray analysis of the DF-1 and CEF, in both normal and stimulated conditions using recombinant chicken chIFN-α and the CEF-adapted infectious bursal disease virus vaccine strain PBG98.
Project description:Infectious bursal disease virus (IBDV) causes a highly contagious, immunosuppressive disease in chickens. The virus mainly infects immature B lymphocytes in the bursa of Fabricius (BF). Chicken B cell line DT40, an avian leukosis virus-induced B cell line, supports very virulent IBDV (vvIBDV) infection in vitro and thereby serves as a good model for investigating the infection and pathogenesis of this virus. However, a transcriptome-wide understanding of the interaction between vvIBDV and B cells has not yet been achieved. This study aimed to employ time-course DNA microarrays to investigate gene expression patterns in DT40 cells after infection with vvIBDV strain LX.
Project description:Infectious bursal disease virus (IBDV) is the pathogenic agent of infectious bursal disease (IBD). Scine it was observed in 1957, IBD spread worldwidely in the chicken flocks, is a important immunosuppressive disease and an threat to poultry industry. Although many studies have be done about IBDV, interaction of IBDV infection and IBDV-encoding genes to host cell gene expression are little known. In this study, the LongSAGE library of Vero-cell, IBDV- infected vero cell, Vero-cell transfected with IBDV-VP5 gene, Vero-cell transfected with IBDV A frament and Vero-cell transfected with IBDV VP243 frament were obtained. We got 96,213 gene tags (17 nucleotides), which represented 24,475 transcripts. Keywords: Transcripts of different state vero-cell
Project description:Transcriptomics analysis reveals that severity of infectious bursal disease in White Leghorn inbred chicken lines is associated with greater bursal inflammation in vivo and more rapid induction of pro-inflammatory responses following ex vivo stimulation of primary bursal cells. In order to better understand differences in the outcome of infectious bursal disease virus (IBDV) infection, we inoculated very virulent (vv) IBDV into White Leghorn chickens from inbred line W that previously had over 24% mortality, and three inbred lines (15I, C.B4 and O) that previously had 0% mortality. Within each experimental group, some individuals experienced more severe disease than others but line 15I birds experienced milder disease based on average clinical scores, percentage of birds with gross pathology, average bursal lesion scores and average peak bursal virus titre. RNA-Seq analysis revealed that more severe disease was associated with a significant up-regulation of pathways involved in inflammation, cytoskeletal regulation by Rho GTPase, nicotinic acetylcholine receptor signaling, and Wnt signaling in the bursa. Primary bursal cells cultured from line W birds and stimulated ex vivo with LPS had a more rapid up-regulation of pro-inflammatory gene expression than cells from line 15I birds, and line W birds had a significantly greater percentage of KUL01+ macrophage cells in the BF than line 15I birds. We hypothesize that a more rapid induction of pro-inflammatory cytokine responses in line W birds causes excessive inflammation and clinical disease following IBDV infection compared to line 15I, and we suggest that pro-inflammatory pathways could be targeted to engineer more disease resistant birds in the future
