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Heterologous expression and characterization of two novel glucanases derived from sheep rumen microbiota. World J Microbiol Biotechnol 2022; 38:87. [DOI: 10.1007/s11274-022-03269-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Accepted: 03/22/2022] [Indexed: 11/27/2022]
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Whitworth KM, Green JA, Redel BK, Geisert RD, Lee K, Telugu BP, Wells KD, Prather RS. Improvements in pig agriculture through gene editing. CABI AGRICULTURE AND BIOSCIENCE 2022; 3:41. [PMID: 35755158 PMCID: PMC9209828 DOI: 10.1186/s43170-022-00111-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Accepted: 06/12/2022] [Indexed: 05/06/2023]
Abstract
Genetic modification of animals via selective breeding is the basis for modern agriculture. The current breeding paradigm however has limitations, chief among them is the requirement for the beneficial trait to exist within the population. Desirable alleles in geographically isolated breeds, or breeds selected for a different conformation and commercial application, and more importantly animals from different genera or species cannot be introgressed into the population via selective breeding. Additionally, linkage disequilibrium results in low heritability and necessitates breeding over successive generations to fix a beneficial trait within a population. Given the need to sustainably improve animal production to feed an anticipated 9 billion global population by 2030 against a backdrop of infectious diseases and a looming threat from climate change, there is a pressing need for responsive, precise, and agile breeding strategies. The availability of genome editing tools that allow for the introduction of precise genetic modification at a single nucleotide resolution, while also facilitating large transgene integration in the target population, offers a solution. Concordant with the developments in genomic sequencing approaches, progress among germline editing efforts is expected to reach feverish pace. The current manuscript reviews past and current developments in germline engineering in pigs, and the many advantages they confer for advancing animal agriculture.
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Affiliation(s)
- Kristin M. Whitworth
- Division of Animal Science, College of Agriculture Food and Natural Resources, University of Missouri, 920 East Campus Drive, Columbia, MO 65211 USA
| | - Jonathan A. Green
- Division of Animal Science, College of Agriculture Food and Natural Resources, University of Missouri, 920 East Campus Drive, Columbia, MO 65211 USA
| | - Bethany K. Redel
- United States Department of Agriculture – Agriculture Research Service, Plant Genetics Research Unit, Columbia, MO 65211 USA
| | - Rodney D. Geisert
- Division of Animal Science, College of Agriculture Food and Natural Resources, University of Missouri, 920 East Campus Drive, Columbia, MO 65211 USA
| | - Kiho Lee
- Division of Animal Science, College of Agriculture Food and Natural Resources, University of Missouri, 920 East Campus Drive, Columbia, MO 65211 USA
| | - Bhanu P. Telugu
- Division of Animal Science, College of Agriculture Food and Natural Resources, University of Missouri, 920 East Campus Drive, Columbia, MO 65211 USA
| | - Kevin D. Wells
- Division of Animal Science, College of Agriculture Food and Natural Resources, University of Missouri, 920 East Campus Drive, Columbia, MO 65211 USA
| | - Randall S. Prather
- Division of Animal Science, College of Agriculture Food and Natural Resources, University of Missouri, 920 East Campus Drive, Columbia, MO 65211 USA
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Guan LZ, Zhao S, Shu G, Jiang QY, Cai GY, Wu ZF, Xi QY, Zhang YL. β-Glucanase specific expression in the intestine of transgenic pigs. Transgenic Res 2019; 28:237-246. [PMID: 30697646 DOI: 10.1007/s11248-019-00112-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2018] [Accepted: 01/22/2019] [Indexed: 11/25/2022]
Abstract
Producing heterologous enzymes in the animal digestive tract to improve feed utilization rate is a new research strategy by transgenic technology. In this study, transgenic pigs specifically expressing β-glucanase gene in the intestine were successfully produced by somatic cell nuclear transfer technology in order to improve digestibility of dietary β-glucan and absorption of nutrients. The β-glucanase activity in the intestinal juice of 4 transgenic pigs was found to be 8.59 ± 2.49 U/mL. The feeding trial results showed that the crude protein digestion of 4 transgenic pigs was significantly increased compared with that of the non-transgenic pigs. In order to investigate the inheritance of the transgene, 7 G1 transgenic pigs were successfully obtained. The β-glucanase activity in the intestinal juice of 7 G1 transgenic pigs was found to be 2.35 ± 0.72 U/mL. The feeding trial results showed the crude protein digestion and crude fat digestion were significantly higher in 7 G1 transgenic pigs than in non-transgenic pigs. Taken together, our study demonstrated that the foreign β-glucanase expressing in the intestine of the transgenic pigs could reduce the anti-nutritional effect of β-glucans in feed. In addition, β-glucanase gene could be inherited to the offsprings and maintain its physiological function. It is a promising approach to improve feed utilization by producing transgenic animals.
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Affiliation(s)
- Li-Zeng Guan
- College of Agriculture and Forestry Science, Linyi University, Shuangling Road, Linyi City, China
| | - Shuai Zhao
- National Engineering Research Center for Breeding Swine Industry, Guangdong Provincial Key Laboratory of Agro-animal Genomics and Molecular Breeding, College of Animal Science, SCAU-Alltech Research Joint Alliance, South China Agricultural University, 483 Wushan Road, Guangzhou, 510642, China
| | - Gang Shu
- National Engineering Research Center for Breeding Swine Industry, Guangdong Provincial Key Laboratory of Agro-animal Genomics and Molecular Breeding, College of Animal Science, SCAU-Alltech Research Joint Alliance, South China Agricultural University, 483 Wushan Road, Guangzhou, 510642, China
| | - Qing-Yan Jiang
- National Engineering Research Center for Breeding Swine Industry, Guangdong Provincial Key Laboratory of Agro-animal Genomics and Molecular Breeding, College of Animal Science, SCAU-Alltech Research Joint Alliance, South China Agricultural University, 483 Wushan Road, Guangzhou, 510642, China
| | - Geng-Yuan Cai
- National Engineering Research Center for Breeding Swine Industry, Guangdong Provincial Key Laboratory of Agro-animal Genomics and Molecular Breeding, College of Animal Science, SCAU-Alltech Research Joint Alliance, South China Agricultural University, 483 Wushan Road, Guangzhou, 510642, China
| | - Zhen-Fang Wu
- National Engineering Research Center for Breeding Swine Industry, Guangdong Provincial Key Laboratory of Agro-animal Genomics and Molecular Breeding, College of Animal Science, SCAU-Alltech Research Joint Alliance, South China Agricultural University, 483 Wushan Road, Guangzhou, 510642, China
| | - Qian-Yun Xi
- National Engineering Research Center for Breeding Swine Industry, Guangdong Provincial Key Laboratory of Agro-animal Genomics and Molecular Breeding, College of Animal Science, SCAU-Alltech Research Joint Alliance, South China Agricultural University, 483 Wushan Road, Guangzhou, 510642, China.
| | - Yong-Liang Zhang
- National Engineering Research Center for Breeding Swine Industry, Guangdong Provincial Key Laboratory of Agro-animal Genomics and Molecular Breeding, College of Animal Science, SCAU-Alltech Research Joint Alliance, South China Agricultural University, 483 Wushan Road, Guangzhou, 510642, China.
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Transgenic pigs expressing β-xylanase in the parotid gland improve nutrient utilization. Transgenic Res 2019; 28:189-198. [PMID: 30637610 DOI: 10.1007/s11248-019-00110-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 01/08/2019] [Indexed: 10/27/2022]
Abstract
Xylan is one of the main anti-nutritional factors in pig's feed. Although supplementation of β-xylanase in diet can improve the utilization of nutrients in animals, it is limited by feed cost, manufacturing process and storage stability. To determine whether the expression of endogenous β-xylanase gene xynB in vivo can improve digestibility of dietary xylan and absorption of nutrients, we produced transgenic pigs which express the xynB from Aspergillus Niger CGMCC1067 in the parotid gland via nuclear transfer. In four live transgenic founders, β-xylanase activities in the saliva were 0.74, 0.59, 0.37 and 0.24 U/mL, respectively. Compared with non-transgenic pigs, the content of crude protein (CP) in feces reduced by 15.5% (P < 0.05). Furthermore, in 100 of the 271 F1 pigs the xynB gene was detectable. The digestibility of gross energy and CP in F1 transgenic pigs were increased by 5% and 22%, respectively, with the CP content in feces decreased by 6.4%. Taken together, our study showed that the transgenic pigs producing β-xylanase from parotid gland can reduce the anti-nutritional effect in animal diet and improve the utilization of nutrients.
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The features that distinguish lichenases from other polysaccharide-hydrolyzing enzymes and the relevance of lichenases for biotechnological applications. Appl Microbiol Biotechnol 2018; 102:3951-3965. [DOI: 10.1007/s00253-018-8904-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 02/23/2018] [Accepted: 02/26/2018] [Indexed: 01/16/2023]
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Kerekes A, Hoffmann OI, Iski G, Lipták N, Gócza E, Kues WA, Bősze Z, Hiripi L. Secretion of a recombinant protein without a signal peptide by the exocrine glands of transgenic rabbits. PLoS One 2017; 12:e0187214. [PMID: 29077768 PMCID: PMC5659788 DOI: 10.1371/journal.pone.0187214] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Accepted: 10/16/2017] [Indexed: 12/20/2022] Open
Abstract
Transgenic rabbits carrying mammary gland specific gene constructs are extensively used for excreting recombinant proteins into the milk. Here, we report refined phenotyping of previously generated Venus transposon-carrying transgenic rabbits with particular emphasis on the secretion of the reporter protein by exocrine glands, such as mammary, salivary, tear and seminal glands. The Sleeping Beauty (SB) transposon transgenic construct contains the Venus fluorophore cDNA, but without a signal peptide for the secretory pathway, driven by the ubiquitous CAGGS (CAG) promoter. Despite the absence of a signal peptide, the fluorophore protein was readily detected in milk, tear, saliva and seminal fluids. The expression pattern was verified by Western blot analysis. Mammary gland epithelial cells of SB-CAG-Venus transgenic lactating does also showed Venus-specific expression by tissue histology and fluorescence microscopy. In summary, the SB-CAG-Venus transgenic rabbits secrete the recombinant protein by different glands. This finding has relevance not only for the understanding of the biological function of exocrine glands, but also for the design of constructs for expression of recombinant proteins in dairy animals.
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Affiliation(s)
- Andrea Kerekes
- Department of Animal Biotechnology, NARIC-Agricultural Biotechnology Institute, Gödöllö, Hungary
| | - Orsolya Ivett Hoffmann
- Department of Animal Biotechnology, NARIC-Agricultural Biotechnology Institute, Gödöllö, Hungary
| | - Gergely Iski
- Department of Animal Biotechnology, NARIC-Agricultural Biotechnology Institute, Gödöllö, Hungary
| | - Nándor Lipták
- Department of Animal Biotechnology, NARIC-Agricultural Biotechnology Institute, Gödöllö, Hungary
| | - Elen Gócza
- Department of Animal Biotechnology, NARIC-Agricultural Biotechnology Institute, Gödöllö, Hungary
| | - Wilfried A. Kues
- Department of Biotechnology, Friedrich-Loeffler-Institut, Institut für Nutztiergenetik, Mariensee, Neustadt, Germany
| | - Zsuzsanna Bősze
- Department of Animal Biotechnology, NARIC-Agricultural Biotechnology Institute, Gödöllö, Hungary
| | - László Hiripi
- Department of Animal Biotechnology, NARIC-Agricultural Biotechnology Institute, Gödöllö, Hungary
- * E-mail:
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Lou AG, Cai JS, Zhang XM, Cui CD, Piao YS, Guan LZ. The aflatoxin-detoxifizyme specific expression in the parotid gland of transgenic pigs. Transgenic Res 2017; 26:677-687. [DOI: 10.1007/s11248-017-0036-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Accepted: 07/19/2017] [Indexed: 11/30/2022]
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Improvement of anti-nutritional effect resulting from β-glucanase specific expression in the parotid gland of transgenic pigs. Transgenic Res 2016; 26:1-11. [DOI: 10.1007/s11248-016-9984-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Accepted: 09/29/2016] [Indexed: 01/12/2023]
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Guan LZ, Sun YP, Cai JS, Wu HD, Yu LZ, Zhang YL, Xi QY. The aflatoxin-detoxifizyme specific expression in mouse parotid gland. Transgenic Res 2015; 24:489-96. [PMID: 25603989 DOI: 10.1007/s11248-015-9863-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Accepted: 01/06/2015] [Indexed: 11/28/2022]
Abstract
The aflatoxin-detoxifizyme (ADTZ) gene derived from Armillariella tabescens was cloned into parotid gland-specific expression vector (pPSPBGPneo) to construct the parotid gland-specific vector expressing ADTZ (pPSPBGPneo-ADTZ). Transgenic mice were generated by microinjection and identified by using PCR and Southern blotting analysis. PCR and Southern blotting analysis showed that total six transgenic mice carried the ADTZ gene were generated. RT-PCR analysis indicated that the expression of ADTZ mRNA could be detected only in parotid glands of the transgenic mice. The ADTZ activity in the saliva was found to be 3.72 ± 1.64 U/mL. After feeding a diet containing aflatoxin B1 (AFB1) for 14 days, the effect of ADTZ on serum biochemical indexes and AFB1 residues in serum and liver of mice were evaluated. The results showed that total protein and globulin contents in the test treatment (transgenic mice) produced ADTZ were significantly higher than that of the positive control, while alanine aminotransferase and aspartate aminotransferase activity in serum of the test treatment (transgenic mice) were remarkably lower compared to that of the positive control (P < 0.05). Moreover, AFB1 residues in serum and liver of the test treatment (transgenic mice) were significantly lower compared with that of the positive control (P < 0.05). These results in the study confirmed that ADTZ produced in transgenic mice could reduce, even eliminate the negative effects of AFB1 on mice.
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Affiliation(s)
- Li-zeng Guan
- Agriculture College, Yanbian University, Gongyuan Road, Yanji, 133000, China,
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Lin YS, Yang CC, Hsu CC, Hsu JT, Wu SC, Lin CJ, Cheng WTK. Establishment of a novel, eco-friendly transgenic pig model using porcine pancreatic amylase promoter-driven fungal cellulase transgenes. Transgenic Res 2014; 24:61-71. [PMID: 25063310 DOI: 10.1007/s11248-014-9817-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2014] [Accepted: 07/11/2014] [Indexed: 11/25/2022]
Abstract
Competition between humans and livestock for cereal and legume grains makes it challenging to provide economical feeds to livestock animals. Recent increases in corn and soybean prices have had a significant impact on the cost of feed for pig producers. The utilization of byproducts and alternative ingredients in pig diets has the potential to reduce feed costs. Moreover, unlike ruminants, pigs have limited ability to utilize diets with high fiber content because they lack endogenous enzymes capable of breaking down nonstarch polysaccharides into simple sugars. Here, we investigated the feasibility of a transgenic strategy in which expression of the fungal cellulase transgene was driven by the porcine pancreatic amylase promoter in pigs. A 2,488 bp 5'-flanking region of the porcine pancreatic amylase gene was cloned by the genomic walking technique, and its structural features were characterized. Using GFP as a reporter, we found that this region contained promoter activity and had the potential to control heterologous gene expression. Transgenic pigs were generated by pronuclear microinjection. Founders and offspring were identified by PCR and Southern blot analyses. Cellulase mRNA and protein showed tissue-specific expression in the pancreas of F1 generation pigs. Cellulolytic enzyme activity was also identified in the pancreas of transgenic pigs. These results demonstrated the establishment of a tissue-specific promoter of the porcine pancreatic amylase gene. Transgenic pigs expressing exogenous cellulase may represent a way to increase the intake of low-cost, fiber-rich feeds.
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Affiliation(s)
- Y S Lin
- Department of Animal Science and Technology, National Taiwan University, Taipei, 106, Taiwan, ROC
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Kim JH, Lee MJ, Hwang I, Hwang HJ. In-cell protease assay systems based on trans-localizing molecular beacon proteins using HCV protease as a model system. PLoS One 2013; 8:e59710. [PMID: 23555756 PMCID: PMC3605327 DOI: 10.1371/journal.pone.0059710] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Accepted: 02/17/2013] [Indexed: 11/30/2022] Open
Abstract
This study describes a sensitive in-cell protease detection system that enables direct fluorescence detection of a target protease and its inhibition inside living cells. This live-cell imaging system provides a fluorescent molecular beacon protein comprised of an intracellular translocation signal sequence, a protease-specific cleavage sequence, and a fluorescent tag sequence(s). The molecular beacon protein is designed to change its intracellular localization upon cleavage by a target protease, i.e., from the cytosol to a subcellular organelle or from a subcellular organelle to the cytosol. Protease activity can be monitored at the single cell level, and accordingly the entire cell population expressing the protease can be accurately enumerated. The clear cellular change in fluorescence pattern makes this system an ideal tool for various life science and drug discovery research, including high throughput and high content screening applications.
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Affiliation(s)
- Jeong Hee Kim
- Department of Biochemistry and Molecular Biology, School of Dentistry, Kyung Hee University, Seoul, Korea
- * E-mail: (JHK); (HJH)
| | - Min Jun Lee
- Department of Biochemistry and Molecular Biology, School of Dentistry, Kyung Hee University, Seoul, Korea
- R&D Center, Ahram Biosystems Inc., Seoul, Korea
| | - Inhwan Hwang
- Department of Life Science, POSTECH, Pohang, Korea
| | - Hyun Jin Hwang
- R&D Center, Ahram Biosystems Inc., Seoul, Korea
- * E-mail: (JHK); (HJH)
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