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Li J, Zhang X, Xu J, Pei X, Wu Z, Wang T, Yin S. iTRAQ analysis of liver immune-related proteins from darkbarbel catfish (Pelteobagrus vachelli) infected with Edwardsiella ictaluri. FISH & SHELLFISH IMMUNOLOGY 2019; 87:695-704. [PMID: 30703552 DOI: 10.1016/j.fsi.2019.01.036] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2018] [Revised: 01/18/2019] [Accepted: 01/25/2019] [Indexed: 06/09/2023]
Abstract
Edwardsiella ictaluri causes enteric septicemia of catfish (ESC), a major disease occurring in these siluriform fish. As the liver is an important organ for defending against bacterial pathogens in fish, this study aimed to determine the liver immune response at the protein level. The differential proteomes of the darkbarbel catfish liver in response to E. ictaluri infection were identified with isobaric tags for relative and absolute quantitation (iTRAQ) labeling followed by liquid chromatography-tandem mass spectrometry (LC-MS/MS). Using a 1.2-fold change in expression as a physiologically significant benchmark, a total of 819 differentially expressed proteins were reliably quantified using iTRAQ analysis, including 6 up-regulated proteins and 813 down-regulated proteins. GO enrichment analysis indicated that the "complement activation, alternative pathway" and "complement activation, classical pathway" were significantly enriched. KEGG enrichment analysis indicated the "antigen processing and presentation" and "bacterial secretion system" were significantly enriched. We selected the 6 up-regulated proteins and 10 immune-related down-regulated proteins for validation using real-time PCR. The 10 immune-related proteins included complement component C1r, C3, C5, C7, and C9 and plasma protease C1 inhibitor (C1-INH), signal recognition particle 54 kDa protein (SRP54), SRP receptor, proteasome activator complex subunit 1 (PSME1) and major histocompatibility complex class I (MHC class I) were selected from the GO clusters and KEGG pathways. The variations in mRNA expression for these genes were similar to the results of iTRAQ. This is the first report detailing the proteome response in the darkbarbel catfish liver during E. ictaluri infection and markedly contributes to our understanding of the defense mechanisms in the livers of darkbarbel catfish.
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Affiliation(s)
- Jie Li
- College of Life Sciences, College of Marine Science and Engineering, Nanjing Normal University, Nanjing, Jiangsu 210023, China; Co-Innovation Center for Marine Bio-Industry Technology of Jiangsu Province, Lianyungang, Jiangsu, 222005, China
| | - Xinyu Zhang
- College of Life Sciences, College of Marine Science and Engineering, Nanjing Normal University, Nanjing, Jiangsu 210023, China; Co-Innovation Center for Marine Bio-Industry Technology of Jiangsu Province, Lianyungang, Jiangsu, 222005, China
| | - Jiejie Xu
- College of Life Sciences, College of Marine Science and Engineering, Nanjing Normal University, Nanjing, Jiangsu 210023, China; Co-Innovation Center for Marine Bio-Industry Technology of Jiangsu Province, Lianyungang, Jiangsu, 222005, China
| | - Xueyin Pei
- College of Life Sciences, College of Marine Science and Engineering, Nanjing Normal University, Nanjing, Jiangsu 210023, China; Co-Innovation Center for Marine Bio-Industry Technology of Jiangsu Province, Lianyungang, Jiangsu, 222005, China
| | - Zhaowen Wu
- College of Life Sciences, College of Marine Science and Engineering, Nanjing Normal University, Nanjing, Jiangsu 210023, China; Co-Innovation Center for Marine Bio-Industry Technology of Jiangsu Province, Lianyungang, Jiangsu, 222005, China
| | - Tao Wang
- College of Life Sciences, College of Marine Science and Engineering, Nanjing Normal University, Nanjing, Jiangsu 210023, China; Co-Innovation Center for Marine Bio-Industry Technology of Jiangsu Province, Lianyungang, Jiangsu, 222005, China.
| | - Shaowu Yin
- College of Life Sciences, College of Marine Science and Engineering, Nanjing Normal University, Nanjing, Jiangsu 210023, China; Co-Innovation Center for Marine Bio-Industry Technology of Jiangsu Province, Lianyungang, Jiangsu, 222005, China.
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