Journal article
Hepatic gene expression changes in pigs experimentally infected with the lung pathogen Actinobacillus pleuropneumoniae as analysed with an innate immunity focused microarray
Innate Immunology, Division of Veterinary Diagnostics and Research, National Veterinary Institute, Technical University of Denmark1
Division of Veterinary Diagnostics and Research, National Veterinary Institute, Technical University of Denmark2
National Veterinary Institute, Technical University of Denmark3
Adaptive Immunology & Parasitology, Division of Veterinary Diagnostics and Research, National Veterinary Institute, Technical University of Denmark4
Microbial Ecology, Division of Veterinary Diagnostics and Research, National Veterinary Institute, Technical University of Denmark5
Aarhus University6
Knowledge on gene expression in the liver during respiratory infections is limited although it is well-established that this organ is an important site of synthesis of several systemic innate immune components as response to infections. In the present study, the early transcriptional hepatic response of genes associated with innate immune responses was studied in pigs 14–18 h after intranasal inoculation with Actinobacillus pleuropneumoniae, using innate immune focused microarrays and quantitative real-time PCR (qPCR).
The microarray analysis of liver tissue established that 51 genes were differentially expressed. A large group of these genes encoded proteins involved in the acute phase response, including serum amyloid A, C-reactive protein, fibrinogen, haptoglobin and tumor necrosis factor-a the expression of which were all found to be up-regulated and glutathione S-transferase, transthyretin, transferrin and albumin which were down-regulated.
Additional genes associated with innate immune responses were investigated using qPCR; genes encoding interleukin (IL)1, IL6, IL8, lipopolysaccharide binding protein, lactotransferrin, and PigMAP were up-regulated and interferon 1a, a1-acid glycoprotein, mannan-binding lectin A, surfactant protein D, and surfactant protein A1 were down-regulated in the liver of infected animals.
Down-regulation of a1-acid glycoprotein during infection has not been described previously in any species. These results confirm that the liver plays an important role in initiating and orchestrating the innate immune response to A. pleuropneumoniae infection. Keywords: acute phase protein, hepatic transcriptional response, innate defence, gene expression, pig
Language: | English |
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Publisher: | SAGE Publications |
Year: | 2010 |
Pages: | 343-353 |
ISSN: | 17432839 , 17534259 and 17534267 |
Types: | Journal article |
DOI: | 10.1177/1753425909342730 |
ORCIDs: | Skovgaard, Kerstin , Boye, Mette and Heegaard, Peter M. H. |
Actinobacillus Infections Actinobacillus pleuropneumoniae Acute-Phase Reaction Animals Gene Expression Profiling Gene Expression Regulation Host-Pathogen Interactions Immunity, Innate Liver Male Microarray Analysis Oligonucleotide Array Sequence Analysis Orchiectomy Pneumonia, Bacterial Reverse Transcriptase Polymerase Chain Reaction Swine Transcription, Genetic acute phase protein gene expression hepatic transcriptional response innate defence pig