Project description:To understand the mechanistic basis of local innate and adaptive immunity against infectious bronchitis virus (IBV) at the molecular level, we examined the gene transcription profile of tracheal epithelial layers at 3 days after infection of chickens with an attenuated IBV-Massachusetts strain. Keywords: Disease State Analysis, Early mucosal immune response, FHCRC 13k chicken array
Project description:Ribosome profiling (Ribo-Seq) (maps positions of translating ribosomes on the transcriptome) and RNA-Seq (quantifies the transcriptome) analysis of chicken (Gallus gallus) cells infected with Infectious Bronchitis Virus (IBV) strains Beaudette and M41.
Project description:Infectious bronchitis virus (IBV), is a coronavirus which infects chickens (Gallus gallus), and is one of the foremost causes of economic loss within the poultry industry, affecting the performance of both meat-type and egg-laying birds. The virus replicates not only in the epithelium of upper and lower respiratory tract tissues, but also in many tissues along the alimentary tract and elsewhere e.g. kidney, oviduct and testes. It can be detected in both respiratory and faecal material. There is increasing evidence that IBV can infect species of bird other than the chicken. Interestingly breeds of chicken vary with respect to the severity of infection with IBV, which may be related to the immune response (Cavanagh, 2006). Here we examine differential expression of genes in the trachea of susceptible and resistant birds, in order to identify genes which may be involved in resistance to IBV.
Project description:Avian infectious bronchitis virus (IBV) infection is a major chicken viral respiratory disease that causes significant economic losses to the poultry industry worldwide. The local mucosal immune response plays a vital role against the infection of this respiratory virus. Previous studies have indicated that a variety of innate immunity and a Th1 based adaptive immunity are activated in the host’s early defense (3 days post inoculation, dpi) against IBV invasion and they are responsible for the rapid clearance of virus from the local infection. In the present study, we propose to use IBV as a model system to uncover the molecular mechanism of mucosal immunity development by characterizing the kinetics of the local gene transcription profiles in trachea tissues after administration with an attenuated IBV strain (IBV-Mass). More specifically, immune-related gene transcription profiles in trachea at 1, 3, 5, 8, 12 and 21 days after the primary immunization and at 1 and 2 days after a second immunization were monitored using chicken 13K cDNA Microarray. Keywords: time course, cDNA 13k chicken array from FHCRC, IBV-chicken model
Project description:Infectious bronchitis is a highly contagious respiratory disease of poultry caused by the coronavius infectious bronchitis virus (IBV). Until recently is was thought that coronavirus virions were composed of the structural proteins nucleocapsid, envelope, spike and membrane proteins, but investigations of TGEV and SARS-CoV have shown the proteome of coronavirus virions also includes viral non-structural and group specific proteins as well as host cell proteins. To study the proteome of IBV virions, virus was grown in embryonated chicken eggs and purified by sucrose gradient ultracentrifugation. Purified virus was analysed using sensitive gel-free proteomic techniques to determine the proteome of IBV. Analysis of three preparations of purified IBV yielded a list of 39 proteins commonly associated with the IBV virion. Three of these proteins were the viral structural proteins spike, membrane and nucleocapsid, but none of the viral non-strucutral or groups specific proteins could be identified. The other 35 proteins commonly associated to the IBV virion were all found to be host cell proteins. These proteins were classified into 12 categories using pantherdb (pantherdb.org). These proteins were involved in a diverse range of functions such as cytoskeletal proteins, nucleic acid binding proteins and chaperone proteins. Some of these proteins were unique to this study, whilst others were found to be orthologous to proteins identified in the SARS-CoV protein, and indeed some were also identified in association with virions from a number of other RNA and DNA viruses.
2016-02-15 | PXD002936 | Pride
Project description:Characterization of the chicken transcriptome in response to infectious bronchitis virus infection
Project description:Next-Generation-Sequencing (NGS) technologies have led to important improvement in the detection of new or unrecognized infective agents, related to infectious diseases. In this context, NGS high-throughput technology can be used to achieve a comprehensive and unbiased sequencing of the nucleic acids present in a clinical sample (i.e. tissues). Metagenomic shotgun sequencing has emerged as powerful high-throughput approaches to analyze and survey microbial composition in the field of infectious diseases. By directly sequencing millions of nucleic acid molecules in a sample and matching the sequences to those available in databases, pathogens of an infectious disease can be inferred. Despite the large amount of metagenomic shotgun data produced, there is a lack of a comprehensive and easy-use pipeline for data analysis that avoid annoying and complicated bioinformatics steps. Here we present HOME-BIO, a modular and exhaustive pipeline for analysis of biological entity estimation, specific designed for shotgun sequenced clinical samples. HOME-BIO analysis provides comprehensive taxonomy classification by querying different source database and carry out main steps in metagenomic investigation. HOME-BIO is a powerful tool in the hand of biologist without computational experience, which are focused on metagenomic analysis. Its easy-to-use intrinsic characteristic allows users to simply import raw sequenced reads file and obtain taxonomy profile of their samples.