Gene expression profiling in Salmonella Choleraesuis-infected porcine lung using a long oligonucleotide microarray.
Understanding the transcriptional response to pathogenic bacterial infection within food animals is of fundamental and applied interest. To determine the transcriptional response to Salmonella enterica serovar Choleraesuis (SC) infection, a 13,297-oligonucleotide swine array was used to analyze RNA from control, 24-h postinoculation (hpi), and 48-hpi porcine lung tissue from pigs infected with SC. In total, 57 genes showed differential expression (p < 0.001; false discovery rate = 12%). Quantitative real-time PCR (qRT-PCR) of 61 genes was used to confirm the microarray results and to identify pathways responding to infection. Of the 33 genes identified by microarray analysis as differentially expressed, 23 were confirmed by qRT-PCR results. A novel finding was that two transglutaminase family genes (TGM1 and TGM3) showed dramatic increases in expression postinoculation; combined with several other apoptotic genes, they indicated the induction of apoptotic pathways during SC infection. A predominant T helper 1-type immune response occurred during infection, with interferon gamma (IFNG) significantly increased at 48 hpi. Genes induced by IFNs (GBP1, GBP2, C1S, C1R, MHC2TA, PSMB8, TAP1, TAP2) showed increased expression during porcine lung infection. These data represent the first thorough investigation of gene regulation pathways that control an important porcine respiratory and foodborne bacterial infection.
Zhao
Shu-Hong
SH
Department of Animal Science, Iowa State University, 2255 Kildee Hall, Ames, 50011, USA.
Kuhar
Daniel
D
Lunney
Joan K
JK
Dawson
Harry
H
Guidry
Catherine
C
Uthe
Jolita J
JJ
Bearson
Shawn M D
SM
Recknor
Justin
J
Nettleton
Dan
D
Tuggle
Christopher K
CK
D000818:Animals; D020869:Gene Expression Profiling / Q000662:veterinary*; D008171:Lung Diseases / Q000235:genetics / Q000382:microbiology / Q000662:veterinary*; D020411:Oligonucleotide Array Sequence Analysis / Q000662:veterinary; D020133:Reverse Transcriptase Polymerase Chain Reaction / Q000662:veterinary; D012481:Salmonella Infections, Animal / Q000235:genetics* / Q000382:microbiology; D012476:Salmonella arizonae; D013552:Swine; D013553:Swine Diseases / Q000235:genetics* / Q000382:microbiology