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Early pig response to experimental infection with Actinobacillus pleuropneomuniae

ABSTRACT: The objective of this study was to identify porcine genes which expression was affected by experimental infection with A. pleuropneumoniae within 24 hours after experimental challenge. Microarray experiments were conducted to reveal genes being significantly differentially expressed in infected versus non-infected lung tissue and in liver and lung lymph node tissue from three challenged versus two non-challenged animals. Keywords: Host response

ORGANISM(S): Sus scrofa

PROVIDER: GSE4577 | GEO | 2007/05/04

SECONDARY ACCESSION(S): PRJNA94417

REPOSITORIES: GEO

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Early pig response to experimental infection with Actinobacillus pleuropneomuniae

Project description:The objective of this study was to identify porcine genes which expression was affected by experimental infection with A. pleuropneumoniae within 24 hours after experimental challenge. Microarray experiments were conducted to reveal genes being significantly differentially expressed in infected versus non-infected lung tissue and in liver and lung lymph node tissue from three challenged versus two non-challenged animals. Keywords: Host response Three comparisons were done: - infected versus non-infected lung tissue sampled from three challenged pigs - liver tissue from three challenged versus two non-challenged animals - lung lymph node tissue from three challenged versus two non-challenged animals All experiments were conducted as common reference design.

2010-06-11 | E-GEOD-4577 | biostudies-arrayexpress

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Project description:Actinobacillus pleuropneumoniae is a gram-negative bacterium that causes porcine pleuropneumonia, which is a widespread, highly contagious, and often fatal respiratory disease in swine. In this experiment pigs were inoculated with A. pleuropneumoniae serotype 5b. Liver samples from three non-inoculated pigs and three experimental inoculated pigs were used to characterize the expression profiles of mRNA and microRNA genes using DNA microarrays and Illumina GA deep sequencing, respectively. The microarray analysis identified a large number of genes, which significantly differed in expression in infected versus non-infected animals. MicroRNAs are short single stranded RNA molecules that regulate gene expression by sequence specific binding to the 3´ untranslated region (3´UTR) of target mRNAs. The deep sequencing analysis determined the identity and abundance of nearly 400 microRNAs, of which a portion was found to significantly differ in expression between the infected and non-infected animals. Target genes for differentially expressed microRNAs were predicted using microCosm Targets, which is based on the miRanda algorithm. Comparison on the two gene lists showed many common genes, which may suggest a causative relationship between changes in microRNA expression and target gene expression.

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