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Ye MH, Bao H, Meng Y, Guan LL, Stothard P, Plastow G. Comparative transcriptomic analysis of porcine peripheral blood reveals differentially expressed genes from the cytokine-cytokine receptor interaction pathway related to health status. Genome 2017; 60:1021-1028. [PMID: 28763624 DOI: 10.1139/gen-2017-0074] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
While some research has looked into the host genetic response in pigs challenged with specific viruses or bacteria, few studies have explored the expression changes of transcripts in the peripheral blood of sick pigs that may be infected with multiple pathogens on farms. In this study, the architecture of the peripheral blood transcriptome of 64 Duroc sired commercial pigs, including 18 healthy animals at entry to a growing facility (set as a control) and 23 pairs of samples from healthy and sick pen mates, was generated using RNA-Seq technology. In total, 246 differentially expressed genes were identified to be specific to the sick animals. Functional enrichment analysis for those genes revealed that the over-represented gene ontology terms for the biological processes category were exclusively immune activity related. The cytokine-cytokine receptor interaction pathway was significantly enriched. Nine functional genes from this pathway encoding members (as well as their receptors) of the interleukins, chemokines, tumor necrosis factors, colony stimulating factors, activins, and interferons exhibited significant transcriptional alteration in sick animals. Our results suggest a subset of novel marker genes that may be useful candidate genes in the evaluation and prediction of health status in pigs under commercial production conditions.
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Affiliation(s)
- M H Ye
- a Department of Agricultural, Food and Nutritional Science, University of Alberta, 1400 College Plaza, 8215 112 Street, Edmonton, AB T6G 2C8, Canada.,b College of Bioscience and Biotechnology, Yangzhou University, Yangzhou 225009, China
| | - H Bao
- a Department of Agricultural, Food and Nutritional Science, University of Alberta, 1400 College Plaza, 8215 112 Street, Edmonton, AB T6G 2C8, Canada
| | - Y Meng
- a Department of Agricultural, Food and Nutritional Science, University of Alberta, 1400 College Plaza, 8215 112 Street, Edmonton, AB T6G 2C8, Canada
| | - L L Guan
- a Department of Agricultural, Food and Nutritional Science, University of Alberta, 1400 College Plaza, 8215 112 Street, Edmonton, AB T6G 2C8, Canada
| | - P Stothard
- a Department of Agricultural, Food and Nutritional Science, University of Alberta, 1400 College Plaza, 8215 112 Street, Edmonton, AB T6G 2C8, Canada
| | - G Plastow
- a Department of Agricultural, Food and Nutritional Science, University of Alberta, 1400 College Plaza, 8215 112 Street, Edmonton, AB T6G 2C8, Canada
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Abstract
During karyotype preparation from the bone marrow aspirates of 209 haematological malignancy cases, microfilaria were detected in four samples, whereas routine marrow and peripheral blood smears of these four cases did not show any parasite. The patients were recalled, and their peripheral blood was processed by karyotyping and standard concentration techniques. Karyotype preparation from peripheral blood was performed with and without addition of colchicine. When the blood was processed for karyotyping with colchicine, microfilaria were detected in the peripheral blood of all four patients. In samples without added colchicine, no parasite was observed. The same samples were processed by Knott's concentration technique, which showed microfilariae only in one of the four patients. Routine thick and thin smears of these patients showed no parasite. It seems that the standard karyotype preparation technique with colchicine concentrates the microfilariae in samples where parasite load is small and not demonstrable with standard techniques. Serological tests are available for W. bancrofti and costly, whereas no regular serodiagnosis is available for B. malayi. In a country like India, both parasites are endemic and patients are treated on clinical suspicion when parasitaemia could be low. Low parasitaemia is common because of repeated infection and partial immunity. In such circumstances, a cost-effective concentration technique like this may be useful.
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Affiliation(s)
- Lily S Kerketta
- National Institute of Immunohaematology, KEM Hospital, Mumbai, India
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