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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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Gene Editing of the Catfish Gonadotropin-Releasing Hormone Gene and Hormone Therapy to Control the Reproduction in Channel Catfish, Ictalurus punctatus. BIOLOGY 2022; 11:biology11050649. [PMID: 35625377 PMCID: PMC9138287 DOI: 10.3390/biology11050649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 04/11/2022] [Accepted: 04/22/2022] [Indexed: 11/17/2022]
Abstract
Transcription activator-like effector nuclease (TALEN) plasmids targeting the channel catfish gonadotropin-releasing hormone (cfGnRH) gene were delivered into fertilized eggs with double electroporation to sterilize channel catfish (Ictalurus punctatus). Targeted cfGnRH fish were sequenced and base deletion, substitution, and insertion were detected. The gene mutagenesis was achieved in 52.9% of P1 fish. P1 mutants (individuals with human-induced sequence changes at the cfGnRH locus) had lower spawning rates (20.0−50.0%) when there was no hormone therapy compared to the control pairs (66.7%) as well as having lower average egg hatch rates (2.0% versus 32.3−74.3%) except for one cfGnRH mutated female that had a 66.0% hatch rate. After low fertility was observed in 2016, application of luteinizing hormone-releasing hormone analog (LHRHa) hormone therapy resulted in good spawning and hatch rates for mutants in 2017, which were not significantly different from the controls (p > 0.05). No exogenous DNA fragments were detected in the genome of mutant P1 fish, indicating no integration of the plasmids. No obvious effects on other economically important traits were observed after the knockout of the reproductive gene in the P1 fish. Growth rates, survival, and appearance between mutant and control individuals were not different. While complete knock-out of reproductive output was not achieved, as these were mosaic P1 brood stock, gene editing of channel catfish for the reproductive confinement of gene-engineered, domestic, and invasive fish to prevent gene flow into the natural environment appears promising.
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Comparison of growth performance among channel-blue hybrid catfish, ccGH transgenic channel catfish, and channel catfish in a tank culture system. Sci Rep 2022; 12:740. [PMID: 35031641 PMCID: PMC8760261 DOI: 10.1038/s41598-021-04719-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 12/13/2021] [Indexed: 11/27/2022] Open
Abstract
Fish is an essential source of high-quality protein for people worldwide. The present study was designed to compare the growth performance among the channel-blue hybrid catfish, channel catfish transgenic for the channel catfish growth hormone (ccGH) cDNA driven by the antifreeze protein promoter from an ocean pout Zoarces americanus (opAFP-ccGH), and non-transgenic channel catfish control. Mean body weight of channel-blue hybrid catfish was 15.80 and 24.06% larger than non-transgenic channel catfish control at 4 and 18 months of age, respectively. However, transgenic opAFP-ccGH channel catfish were 5.52 and 43.41% larger than channel-blue hybrid catfish and 22.19 and 77.91% larger than their controls at 4 and 18 months of age, respectively. Significant differences in mean body weight between the sexes within all genetic types were found. Males were larger than females (P < 0.001). However, mean body weight of non-transgenic males was not larger than transgenic opAFP-ccGH females or male and female hybrid catfish. Condition factor of transgenic opAFP-ccGH channel catfish was higher (P < 0.05) than that of full-sibling, non-transgenic channel catfish and hybrid catfish. The mean percentage body weight gain of GH transgenic channel catfish was 559%, the channel-blue hybrid catfish was 384.9% and their non-transgenic controls channel catfish was 352.6%.
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Simora RMC, Wang W, Coogan M, El Husseini N, Terhune JS, Dunham RA. Effectiveness of Cathelicidin Antimicrobial Peptide against Ictalurid Catfish Bacterial Pathogens. JOURNAL OF AQUATIC ANIMAL HEALTH 2021; 33:178-189. [PMID: 34121235 DOI: 10.1002/aah.10131] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 04/18/2021] [Accepted: 04/19/2021] [Indexed: 06/12/2023]
Abstract
One of the major goals in aquaculture is to protect fish against infectious diseases as disease outbreaks could lead to economic losses if not controlled. Antimicrobial peptides (AMPs), a class of highly conserved peptides known to possess direct antimicrobial activities against invading pathogens, were evaluated for their ability to protect Channel Catfish Ictalurus punctatus and hybrid catfish (female Channel Catfish × male Blue Catfish I. furcatus) against infection caused by the fish pathogen Aeromonas hydrophila ML09-119. To identify effective peptides, the minimum inhibitory concentrations against bacterial pathogens Edwardsiella ictaluri S97-773, Edwardsiella piscicida E22-10, A. hydrophila ML09-119, Aeromonas veronii 03X03876, and Flavobacterium columnare GL-001 were determined in vitro. In general and overall, cathelicidins derived from alligator and sea snake exhibited more potent and rapid antimicrobial activities against the tested catfish pathogens as compared to cecropin and pleurocidin AMPs and ampicillin, the antibiotic control. When the peptides (2.5 µg of peptide/g of fish) were injected into fish and simultaneously challenged with A. hydrophila through immersion, increased survival rates in Channel Catfish and hybrid catfish were observed in both cathelicidin (alligator and sea snake) treatments as compared to other peptides and the infected control (P < 0.001) with alligator cathelicidin being the overall best treatment. Bacterial numbers in the kidney and liver of Channel Catfish and hybrid catfish also decreased (P < 0.05) for cathelicidin-injected groups at 24 and 48 h after challenge infection. These results show the potential of cathelicidin to protect catfish against bacterial infections and suggest that an approach overexpressing the peptide in transgenic fish, which is the long-term goal of this research program, may provide a method of decreasing bacterial disease problems in catfish as delivering the peptides via individual injection or feeding would not be economically feasible.
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Affiliation(s)
- Rhoda Mae C Simora
- School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University, Auburn, Alabama, 36849, USA
- College of Fisheries and Ocean Sciences, University of the Philippines Visayas, Miagao, Iloilo, 5023, Philippines
| | - Wenwen Wang
- School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University, Auburn, Alabama, 36849, USA
| | - Michael Coogan
- School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University, Auburn, Alabama, 36849, USA
| | - Nour El Husseini
- School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University, Auburn, Alabama, 36849, USA
- Department of Animal and Avian Sciences, University of Maryland, College Park, Maryland, 20742, USA
| | - Jeffery S Terhune
- School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University, Auburn, Alabama, 36849, USA
| | - Rex A Dunham
- School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University, Auburn, Alabama, 36849, USA
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Yoon JH, Cho YS, Lee HB, Park JY, Lim HK. Dead-End ( dnd) Gene Cloning and Gonad-Specific Expression Pattern in Starry Flounder ( Platichthys stellatus). Animals (Basel) 2021; 11:2256. [PMID: 34438719 PMCID: PMC8388513 DOI: 10.3390/ani11082256] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 07/16/2021] [Accepted: 07/20/2021] [Indexed: 11/24/2022] Open
Abstract
dnd is a germline-specific maternal RNA expressed in various vertebrate classes, which encodes an RNA-binding protein that is essential for PGC migration. The purpose of this study is fundamental research about starry flounder dnd gene for germ cell marker development. In this study, we cloned and analyzed the expression levels of Platichthys stellatus dead end (psdnd) in various tissues and embryonic stages. The psdnd gene was isolated from starry flounder ovaries, cloned into a pGEM-t vector, and sequenced. Full-length of psdnd cDNA was 1495 bp long, encoding 395 amino acids. psdnd expression levels were investigated by real-time polymerase chain reaction (qRT-PCR) in various tissues and embryo developmental stages. psdnd transcripts were detected in the testes and ovaries, but not in somatic tissues. Embryonic psdnd expression levels were higher during early embryo development stages than during late embryogenesis; psdnd expression was highest at the 1 cell stage, then gradually decreased throughout the subsequent developmental stages. The spatial expression pattern was analyzed by whole-mount in situ hybridization (WISH). The psdnd transcripts migration pattern was similar with zebrafish (Danio rerio). Our results suggest that psdnd may function as a germ cell-specific marker.
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Affiliation(s)
- Ji-Hye Yoon
- Department of Interdisciplinary Program of Biomedicine, Health & Life Convergence Science, Mokpo National University (MNU), Muan 58554, Korea; (J.-H.Y.); (H.-B.L.)
| | - Youn-Su Cho
- Department of Fishery Biology, Pukyong National University (PKNU), Busan 48512, Korea;
| | - Hyo-Bin Lee
- Department of Interdisciplinary Program of Biomedicine, Health & Life Convergence Science, Mokpo National University (MNU), Muan 58554, Korea; (J.-H.Y.); (H.-B.L.)
| | - Jung-Yeol Park
- Department of Marine and Fisheries Resources, Mokpo National University (MNU), Muan 58554, Korea;
| | - Han-Kyu Lim
- Department of Interdisciplinary Program of Biomedicine, Health & Life Convergence Science, Mokpo National University (MNU), Muan 58554, Korea; (J.-H.Y.); (H.-B.L.)
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Baloch AR, Franěk R, Saito T, Pšenička M. Dead-end (dnd) protein in fish-a review. FISH PHYSIOLOGY AND BIOCHEMISTRY 2021; 47:777-784. [PMID: 30671782 DOI: 10.1007/s10695-018-0606-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Accepted: 12/28/2018] [Indexed: 06/09/2023]
Abstract
Dead end (dnd) is a germ plasm-specific maternal RNA discovered in zebrafish and then in other vertebrates. Dnd protein is essential for migration and motility of primordial germ cells (PGCs), only cells destined to transfer genetic information to offspring. PGCs arise far from somatic cells of developing gonads and they must migrate to their site of function. Migration of PGCs follows complex path by various developing tissues as their disruption impacts on the fertility. Recently, it has been found that dnd is not required for survival of PGCs and dnd-deficient zebrafish PGCs transdifferentiate into the somatic cells. In fish, targeting dnd causes removal of PGCs that ultimately affects sex differentiation. Sterility in various fish species can be achieved by knockdown or knockout of dnd. In our review, we have discussed dnd as a germ cell-specific molecular marker in fish, its interaction with miRNAs, and its use in aquaculture and fish conservation.
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Affiliation(s)
- Abdul Rasheed Baloch
- South Bohemian Research Center for Aquaculture and Biodiversity of Hydrocenoses, Research Institute of Fish Culture and Hydrobiology, Faculty of Fisheries and Protection of Waters, University of South Bohemia in Ceske Budejovice, Zatisi 728/II, 389 25, Vodnany, Czech Republic.
| | - Roman Franěk
- South Bohemian Research Center for Aquaculture and Biodiversity of Hydrocenoses, Research Institute of Fish Culture and Hydrobiology, Faculty of Fisheries and Protection of Waters, University of South Bohemia in Ceske Budejovice, Zatisi 728/II, 389 25, Vodnany, Czech Republic
| | - Taiju Saito
- South Bohemian Research Center for Aquaculture and Biodiversity of Hydrocenoses, Research Institute of Fish Culture and Hydrobiology, Faculty of Fisheries and Protection of Waters, University of South Bohemia in Ceske Budejovice, Zatisi 728/II, 389 25, Vodnany, Czech Republic
- Nishiura Station, South Ehime Fisheries Research Center, Ehime University, Uchidomari, Ainan, Ehime, 798-4206, Japan
| | - Martin Pšenička
- South Bohemian Research Center for Aquaculture and Biodiversity of Hydrocenoses, Research Institute of Fish Culture and Hydrobiology, Faculty of Fisheries and Protection of Waters, University of South Bohemia in Ceske Budejovice, Zatisi 728/II, 389 25, Vodnany, Czech Republic
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