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Abass NY, Simora RMC, Wang J, Li S, Xing D, Coogan M, Johnson A, Creamer D, Wang X, Dunham RA. Response of cecropin transgenesis to challenge with Edwardsiella ictaluri in channel catfish Ictalurus punctatus. FISH & SHELLFISH IMMUNOLOGY 2022; 126:311-317. [PMID: 35636698 DOI: 10.1016/j.fsi.2022.05.050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 05/09/2022] [Accepted: 05/24/2022] [Indexed: 06/15/2023]
Abstract
Constructs bearing the cecropin B gene from the moth Hyalophora cecropia, driven by the cytomegalovirus (CMV) promoter, or the common carp beta-actin (β-actin) promoter were transferred to channel catfish, Ictalurus punctatus via electroporation. One F3 channel catfish family transgenic for cecropin transgene driven by the CMV promoter, and one F1 channel catfish family transgenic for cecropin transgene driven by the common carp β-actin promoter were produced. F3 and F1 individuals exhibited enhanced disease resistance when challenged in tanks with Edwardsiella ictaluri, the causative agent of enteric septicemia of catfish (ESC). Inheritance of the transgene by the F1 and F3 generation was 15% and 60%, respectively. Growth rates of the cecropin transgenic and non-transgenic full siblings (controls) channel catfish were not different (P > 0.05). All transgenic fish showed significant resistance to infection by ESC at day 3 and day 4 post exposure (P = 0.005). No correlation was detected between body weight and time to death for all genetic groups (P = 0.34). Results of our study confirmed that genetic enhancement of E. ictaluri resistance can be achieved by cecropin transgenesis in channel catfish. In addition to survival rate, improving survival time is essential because the extension of survival time gives a better chance to apply treatments to stop the bacterial infection.
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Affiliation(s)
- Nermeen Y Abass
- School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University, Auburn, AL, 36849, USA; Department of Agricultural Botany, Faculty of Agriculture Saba-Basha, Alexandria University, Alexandria City, P.O. Box 21531, Egypt.
| | - Rhoda Mae C Simora
- School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University, Auburn, AL, 36849, USA; College of Fisheries and Ocean Sciences, University of the Philippines Visayas, Miagao, Iloilo, 5023, Philippines
| | - Jinhai Wang
- School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University, Auburn, AL, 36849, USA
| | - Shangjia Li
- School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University, Auburn, AL, 36849, USA
| | - De Xing
- School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University, Auburn, AL, 36849, USA
| | - Michael Coogan
- School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University, Auburn, AL, 36849, USA
| | - Andrew Johnson
- School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University, Auburn, AL, 36849, USA
| | - David Creamer
- School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University, Auburn, AL, 36849, USA
| | - Xu Wang
- Department of Pathobiology, Auburn University, Auburn, AL, 36849, USA; HudsonAlpha Institute for Biotechnology, Huntsville, AL, 35806, USA
| | - Rex A Dunham
- School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University, Auburn, AL, 36849, USA
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Ri S, Hwang W, Ri S, Shi W, Han Y, Tang Y, Zhang L, Yan M, Liu G. Cloning, characterization, and transcriptional activity of β-actin promoter of African catfish (Clarias gariepinus). Mol Biol Rep 2021; 48:2561-2571. [PMID: 33829356 DOI: 10.1007/s11033-021-06306-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 03/19/2021] [Indexed: 11/25/2022]
Abstract
Selection of suitable promoters is crucial for the efficient expression of exogenous genes in transgenic animals. Although one of the most effective promoters, the β-actin promoter, has been widely studied in fish species, it still remains unknown in the economical important African catfish (Clarias gariepinus). In this study, the β-actin promoter of African catfish (cgβ-actinP) was cloned and characterized. In addition, recombinant plasmid pcgβ-actinP-EGFP with enhanced green fluorescent protein (GFP) gene as the reporter gene was constructed to verify the transcriptional activity. We obtained a cgβ-actinP fragment length of 1405 bp, consisting 104 bp of the 5' proximal promoter, 96 bp of the first exon, and 1205 bp of the first intron. Similar to those of other fish species, cgβ-actinP contains three key transcription regulatory elements (CAAT box, CArG motif, and TATA box). GFP-specific fluorescent signals were detected in chicken embryonic fibroblasts cells (DF-1 cells) transfected with pcgβ-actinP-EGFP, which was approximately 1.11 times of the positive control. In addition, GFP was effectively expressed in zebrafish larvae microinjected with linearized cgβ-actinP-EGFP, with expression rate reaching approximately 49.84%. Our data indicate that cgβ-actinP could be a potential candidate promoter in the practice of constructing "all fish" transgenic fish.
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Affiliation(s)
- Sanghyok Ri
- College of Animal Sciences, Zhejiang University, Hangzhou, 310058, PR China
- College of Life Science, Kim Hyong Jik University of Education, Pyongyang, 99903, Democratic People's Republic of Korea
| | - Wenho Hwang
- College of Animal Sciences, Zhejiang University, Hangzhou, 310058, PR China
| | - Sangryong Ri
- Faculty of Chemistry, Kim II Sung University, Pyongyang, 99903, Democratic People's Republic of Korea
| | - Wei Shi
- College of Animal Sciences, Zhejiang University, Hangzhou, 310058, PR China
| | - Yu Han
- College of Animal Sciences, Zhejiang University, Hangzhou, 310058, PR China
| | - Yu Tang
- College of Animal Sciences, Zhejiang University, Hangzhou, 310058, PR China
| | - Lining Zhang
- Zhejiang Mariculture Research Institute, Wenzhou, 325005, PR China
| | - Maocang Yan
- Zhejiang Mariculture Research Institute, Wenzhou, 325005, PR China
| | - Guangxu Liu
- College of Animal Sciences, Zhejiang University, Hangzhou, 310058, PR China.
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Selection of growth-related genes and dominant genotypes in transgenic Yellow River carp Cyprinus carpio L. Funct Integr Genomics 2018; 18:425-437. [PMID: 29623522 PMCID: PMC6004361 DOI: 10.1007/s10142-018-0597-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Revised: 01/23/2018] [Accepted: 02/26/2018] [Indexed: 12/02/2022]
Abstract
Transgenic Yellow River carp is characterized by rapid growth rate and high feed-conversion efficiency and exhibits a great application prospect. However, there is still a significant separation of growth traits in the transgenic Yellow River carp family; as such, growth-related genotypes must be screened for molecular marker-assisted selection. In this study, 23 growth-related candidate genes containing 48 SNP markers were screened through bulked segregant analysis (BSA) among transgenic Yellow River carp family members showing significant separation of growth traits. Then, two growth-related genes (Nos. 17 and 14 genes) were identified through combined genome-wide association study (GWAS) of candidate genes and validation of the full-sibling family approach. Nos. 17 and 14 genes encode BR serine/threonine-protein kinase 2 (BRSK2) and eukaryotic translation-initiation factor 2-alpha kinase 3 (Eif2ak3), respectively. The average body weight of three subgroups carrying the genotypes 17GG, 17GG + 14CC, and 17GG + 14TT of these two genes increased by 27.96, 38.28, and 33.72%, respectively, compared with the controls. The proportion of individuals with body weight > 500 g in these subgroups increased by 19.22, 26.82, and 30.92%, respectively. The results showed that appropriate genotype carriers can be selected from the progeny population through BSA sequencing combined with simplified GWAS analysis. Hence, basic population for breeding can be constructed and transgenic Yellow River carp strains with stable production performance and uniform phenotypic properties can be bred.
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