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Xiong Y, Zheng X, Ke W, Gong G, Wang Y, Dan C, Huang P, Wu J, Guo W, Mei J. Function and association analysis of Cyclophilin A gene with resistance to Edwardsiella ictaluri in yellow catfish. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2020; 113:103783. [PMID: 32735962 DOI: 10.1016/j.dci.2020.103783] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 05/08/2020] [Accepted: 06/25/2020] [Indexed: 06/11/2023]
Abstract
Edwardsiella ictaluri (E. ictaluri) is one of the main bacterial pathogens in catfish which has caused serious economic loss to yellow catfish (Pelteobagrus fulvidraco) in China. In our previous work, we demonstrated that CypA was up-regulated at the early stage of E. ictaluri infection in yellow catfish and displayed strong chemotactic activity for leukocytes in vitro. However, the effect of CypA on E. ictaluri is unknown in vivo. Therefore, two homozygous transgenic zebrafish lines expressing yellow catfish CypA (TG-CypA-1 and TG-CypA-2) were generated. After challenged with E. ictaluri at a dose of 1.0 × 104 CFU per adult fish, both two transgenic lines exhibited a higher resistance to bacterial infection than the wildtype zebrafish. Herein, CypA gene in E. ictaluri-challenged yellow catfish was screened for presence of polymorphisms by sequencing and six single nucleotide polymorphisms (SNPs) were identified. SNP association analysis revealed that 528T/C SNP in the first intron was significantly different in disease-susceptible and -resistant groups, which was confirmed in two independent populations of yellow catfish. Moreover, the relative expression of CypA in the resistant group (CC genotype in 528T/C SNP) was significantly higher than that in the susceptible group (TT genotype in 528T/C SNP) in different immune organs of yellow catfish including spleen, head kidney, body kidney and liver. Our results reveal the potential function of CypA in host defense to bacterial infection and suggest the SNP marker in CypA gene associated with the resistance to E. ictaluri may facilitate the selective breeding of disease-resistant yellow catfish in the future.
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Affiliation(s)
- Yang Xiong
- College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, China
| | - Xiaozhen Zheng
- College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, China
| | - Wensi Ke
- College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, China
| | - Gaorui Gong
- College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, China
| | - Yuhong Wang
- College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, China
| | - Cheng Dan
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
| | - Peipei Huang
- College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, China
| | - Jiankai Wu
- Kangyu Fisheries Technology Co. Ltd. of Sheyang County, Sheyang, 224300, China
| | - Wenjie Guo
- College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, China.
| | - Jie Mei
- College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, China.
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Chemotactic Activity of Cyclophilin A in the Skin Mucus of Yellow Catfish (Pelteobagrus fulvidraco) and Its Active Site for Chemotaxis. Int J Mol Sci 2016; 17:ijms17091422. [PMID: 27589721 PMCID: PMC5037701 DOI: 10.3390/ijms17091422] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2016] [Revised: 08/16/2016] [Accepted: 08/23/2016] [Indexed: 01/18/2023] Open
Abstract
Fish skin mucus is a dynamic barrier for invading pathogens with a variety of anti-microbial enzymes, including cyclophilin A (CypA), a multi-functional protein with peptidyl-prolyl cis/trans isomerase (PPIase) activity. Beside various other immunological functions, CypA induces leucocytes migration in vitro in teleost. In the current study, we have discovered several novel immune-relevant proteins in yellow catfish skin mucus by mass spectrometry (MS). The CypA present among them was further detected by Western blot. Moreover, the CypA present in the skin mucus displayed strong chemotactic activity for yellow catfish leucocytes. Interestingly, asparagine (like arginine in mammals) at position 69 was the critical site in yellow catfish CypA involved in leucocyte attraction. These novel efforts do not only highlight the enzymatic texture of skin mucus, but signify CypA to be targeted for anti-inflammatory therapeutics.
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Xu T, Xie J, Yang S, Ye S, Luo M, Wu X. First characterization of three cyclophilin family proteins in the oyster, Crassostrea ariakensis Gould. FISH & SHELLFISH IMMUNOLOGY 2016; 55:257-266. [PMID: 27238430 DOI: 10.1016/j.fsi.2016.05.037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Revised: 05/24/2016] [Accepted: 05/25/2016] [Indexed: 06/05/2023]
Abstract
Cyclophilins (CyPs) are a family of proteins that bind the immunosuppressive agent cyclosporin A (CsA) with high-affinity and belong to one of the three superfamilies of peptidyl-prolyl cis-trans isomerases (PPIase). In this report, three cyclophilin genes (Ca-CyPs), including Ca-CyPA, Ca-CyPB and Ca-PPIL3, were identified from oyster, Crassostrea ariakensis Gould in which Ca-CyPA encodes a protein with 165 amino acid sequences, Ca-CyPB encodes a protein with 217 amino acid sequences and Ca-PPIL3 encodes a protein with 162 amino acid sequences. All of the three Ca-CyPs genes contain a typical CyP-PPIase domain with its signature sequences and Ca-CyPB contains an N-signal peptide sequences. Tissue distribution study revealed that Ca-CyPs were ubiquitously expressed in all examined tissues and the highest levels were observed in hemocytes. RLO incubation upregulated the mRNA expression levels of Ca-CyPs, indicating that three Ca-CyPs might be involved in oyster immune response against RLO infection.
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Affiliation(s)
- Ting Xu
- Laboratory of Marine Life Science and Technology, College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China; School of Life Sciences, Shaoxing University, Shaoxing, Zhejiang, China
| | - Jiasong Xie
- Laboratory of Marine Life Science and Technology, College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China
| | - Shoubao Yang
- School of Life Sciences, Shaoxing University, Shaoxing, Zhejiang, China
| | - Shigen Ye
- Laboratory of Marine Life Science and Technology, College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China
| | - Ming Luo
- Laboratory of Marine Life Science and Technology, College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China
| | - Xinzhong Wu
- Laboratory of Marine Life Science and Technology, College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China; Ocean College, Qinzhou University, Qinzhou City, Guangxi, China.
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Dong X, Qin Z, Hu X, Lan J, Yuan G, Asim M, Zhou Y, Ai T, Mei J, Lin L. Molecular cloning and functional characterization of cyclophilin A in yellow catfish (Pelteobagrus fulvidraco). FISH & SHELLFISH IMMUNOLOGY 2015; 45:422-30. [PMID: 25882636 DOI: 10.1016/j.fsi.2015.04.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2014] [Revised: 03/31/2015] [Accepted: 04/04/2015] [Indexed: 05/04/2023]
Abstract
Cyclophilin A (CypA) is a ubiquitously expressed protein which involves in diverse pathological conditions including infection and inflammation. In this report, a CypA gene (designated as YC-CypA) was cloned from yellow catfish (Pelteobagrus fulvidraco) which is an important cultured fish species in Asian countries. The open reading frame (ORF) of YC-CypA encoded a polypeptide of 164 amino acids with calculated molecular weight of 17.70 kDa. The deduced amino acid sequences of the YC-CypA shared highly conserved structures with CypAs from the other species, indicating that YC-CypA should be a new member of the CypA family. Full-length YC-CypA protein was expressed in Escherichia coli and specific polyclonal antibody against YC-CypA was generated. The YC-CypA protein showed chemotactic activity by transwell migration assay. The mRNA and protein of YC-CypA could be detected in all examined tissues with relatively higher mRNA level in spleen and higher protein level in head kidney, respectively. The temporal expression patterns of YC-CypA, IL-1β and TNF-α mRNAs were analyzed in the liver, spleen and head kidney post of Edwardsiella ictaluri infection. By immunohistochemistry assay, slight enhancement of YC-CypA protein was observed in the liver, spleen, body kidney and head kidney of yellow catfish infected with E. ictaluri. In conclusion, YC-CypA of yellow catfish showed chemotactic activity in vitro and might have been involved in cytokines secretion in yellow catfish during the infection of E. ictaluri.
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Affiliation(s)
- Xingxing Dong
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, Wuhan, Hubei 430070, China; Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan, Hubei 430070, China
| | - Zhendong Qin
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, Wuhan, Hubei 430070, China; Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan, Hubei 430070, China
| | - Xianqin Hu
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, Wuhan, Hubei 430070, China; School of Animal Science and Nutritional Engineering, Wuhan Polytechnic University, Wuhan, Hubei 430023, China
| | - Jiangfeng Lan
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, Wuhan, Hubei 430070, China; Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan, Hubei 430070, China
| | - Gailing Yuan
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, Wuhan, Hubei 430070, China; Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan, Hubei 430070, China
| | - Muhammad Asim
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Yang Zhou
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, Wuhan, Hubei 430070, China; Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan, Hubei 430070, China
| | - Taoshan Ai
- Wuhan Fishery Research Institute, Wuhan, Hubei 430207, China
| | - Jie Mei
- Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan, Hubei 430070, China; Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Wuhan, Hubei 430070, China.
| | - Li Lin
- Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, Wuhan, Hubei 430070, China; Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan, Hubei 430070, China; Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Wuhan, Hubei 430070, China.
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