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Mazloum A, Karagyaur M, Chernyshev R, van Schalkwyk A, Jun M, Qiang F, Sprygin A. Post-genomic era in agriculture and veterinary science: successful and proposed application of genetic targeting technologies. Front Vet Sci 2023; 10:1180621. [PMID: 37601766 PMCID: PMC10434572 DOI: 10.3389/fvets.2023.1180621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 07/20/2023] [Indexed: 08/22/2023] Open
Abstract
Gene editing tools have become an indispensable part of research into the fundamental aspects of cell biology. With a vast body of literature having been generated based on next generation sequencing technologies, keeping track of this ever-growing body of information remains challenging. This necessitates the translation of genomic data into tangible applications. In order to address this objective, the generated Next Generation Sequencing (NGS) data forms the basis for targeted genome editing strategies, employing known enzymes of various cellular machinery, in generating organisms with specifically selected phenotypes. This review focuses primarily on CRISPR/Cas9 technology in the context of its advantages over Zinc finger proteins (ZNF) and Transcription activator-like effector nucleases (TALEN) and meganucleases mutagenesis strategies, for use in agricultural and veterinary applications. This review will describe the application of CRISPR/Cas9 in creating modified organisms with custom-made properties, without the undesired non-targeted effects associated with virus vector vaccines and bioactive molecules produced in bacterial systems. Examples of the successful and unsuccessful applications of this technology to plants, animals and microorganisms are provided, as well as an in-depth look into possible future trends and applications in vaccine development, disease resistance and enhanced phenotypic traits will be discussed.
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Affiliation(s)
- Ali Mazloum
- Federal Center for Animal Health, Vladimir, Russia
| | - Maxim Karagyaur
- Institute for Regenerative Medicine, Medical Research and Education Center, Lomonosov Moscow State University, Moscow, Russia
| | | | - Antoinette van Schalkwyk
- Agricultural Research Council-Onderstepoort Veterinary Institute, Onderstepoort, South Africa
- Department of Biotechnology, University of the Western Cape, Bellville, South Africa
| | - Ma Jun
- School of Life Sciences and Engineering, Foshan University, Foshan, China
| | - Fu Qiang
- School of Life Sciences and Engineering, Foshan University, Foshan, China
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Lu Z, Chen P, Xu Q, Li B, Jiang S, Jiang L, Zheng X. Constitutive and conditional gene knockout mice for the study of intervertebral disc degeneration: Current status, decision considerations, and future possibilities. JOR Spine 2023; 6:e1242. [PMID: 36994464 PMCID: PMC10041386 DOI: 10.1002/jsp2.1242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 12/13/2022] [Accepted: 12/22/2022] [Indexed: 01/09/2023] Open
Abstract
There have been an increasing number of patients with degenerative disc diseases due to the aging population. In light of this, studies on the pathogenesis of intervertebral disc degeneration have become a hot topic, and gene knockout mice have become a valuable tool in this field of research. With the development of science and technology, constitutive gene knockout mice can be constructed using homologous recombination, zinc finger nuclease, transcription activator-like effector nuclease technology and clustered regularly interspaced short palindromic repeats/Cas9 (CRISPR/Cas9) system, and conditional gene knockout mice can be constructed using the Cre/LoxP system. The gene-edited mice using these techniques have been widely used in the studies on disc degeneration. This paper reviews the development process and principles of these technologies, functions of the edited genes in disc degeneration, advantages, and disadvantages of different methods and possible targets of the specific Cre recombinase in intervertebral discs. Recommendations for the choice of suitable gene-edited model mice are presented. At the same time, possible technological improvements in the future are also discussed.
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Affiliation(s)
- Ze‐Yu Lu
- Spine Center Xinhua Hospital, Shanghai Jiao Tong University School of Medicine Shanghai China
| | - Peng‐Bo Chen
- Spine Center Xinhua Hospital, Shanghai Jiao Tong University School of Medicine Shanghai China
| | - Qing‐Yin Xu
- Spine Center Xinhua Hospital, Shanghai Jiao Tong University School of Medicine Shanghai China
| | - Bo Li
- Spine Center Xinhua Hospital, Shanghai Jiao Tong University School of Medicine Shanghai China
| | - Sheng‐Dan Jiang
- Spine Center Xinhua Hospital, Shanghai Jiao Tong University School of Medicine Shanghai China
| | - Lei‐Sheng Jiang
- Spine Center Xinhua Hospital, Shanghai Jiao Tong University School of Medicine Shanghai China
| | - Xin‐Feng Zheng
- Spine Center Xinhua Hospital, Shanghai Jiao Tong University School of Medicine Shanghai China
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3
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Jiang W, Wang J, Pan H, Yang R, Ma F, Luo J, Han C. Advances in Mechanism and Application of Molecular Breeding of Medicinal Mushrooms: A Review. Int J Med Mushrooms 2023; 25:65-74. [PMID: 37831513 DOI: 10.1615/intjmedmushrooms.2023050122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2023]
Abstract
With the development of molecular biology and genomics technology, mushroom breeding methods have changed from single traditional breeding to molecular breeding. Compared with traditional breeding methods, molecular breeding has the advantages of short time and high efficiency. It breaks through the restrictive factors of conventional breeding and improves the accuracy of breeding. Molecular breeding technology is gradually applied to mushroom breeding. This paper summarizes the concept of molecular breeding and the application progress of various molecular breeding technologies in mushroom breeding, in order to provide reference for future research on mushroom breeding.
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Affiliation(s)
- Wenming Jiang
- School of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan, 250355, People's Republic of China
| | - Jing Wang
- Research and Development Center, Shandong Phoenix Biotechnology Co. Ltd., Taian, Shandong, 271000, P.R. China
| | - Hongyu Pan
- School of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan, Shandong, 250355, P.R. China
| | - Rui Yang
- School of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan, 250355, People's Republic of China
| | - Feifei Ma
- School of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan, 250355, People's Republic of China
| | - Jiahao Luo
- School of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan, 250355, People's Republic of China
| | - Chunchao Han
- School of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan 250355, People's Republic of China; Shandong Provincial Collaborative Innovation Center for Quality Control and Construction of the Whole Industrial Chain of Traditional Chinese Medicine, Jinan, Shandong, 250355, People's Republic of China
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Zhang Z, Han Z, Guo Y, Liu X, Gao Y, Zhang Y. Establishment of an Efficient Immortalization Strategy Using HMEJ-Based b TERT Insertion for Bovine Cells. Int J Mol Sci 2021; 22:ijms222212540. [PMID: 34830422 PMCID: PMC8622252 DOI: 10.3390/ijms222212540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Revised: 11/17/2021] [Accepted: 11/18/2021] [Indexed: 12/09/2022] Open
Abstract
Immortalized cell lines have been used in a wide range of applications in research on immune disorders and cellular metabolic regulation due to the stability and uniformity of their cellular characteristics. At present, the investigation into molecular functions and signaling pathways within bovine cells remains largely limited by the lack of immortalized model cells. Current methods for immortalizing bovine cells are mainly restricted to the ectopic expression of human telomerase reverse transcriptase (hTERT) through transient transfection or virus-mediated delivery, which have defects in efficiency and reliability. In this study, we identified bovine TERT (bTERT) as a novel potent biofactor for immortalizing bovine cells with great advantages over hTERT, and established an efficient and easily manipulated strategy for the immortalization of bovine primary cells. Through the homology-mediated end-joining-based insertion of bTERT at the ROSA26 locus, we successfully generated immortalized bovine fetal fibroblast cell lines with stable characteristics. The observed limitation of this strategy in immortalizing bovine bone marrow-derived macrophages was attributed to the post-translational modification of bTERT, causing inhibited nuclear localization and depressed activity of bTERT in this terminally differentiated cell. In summary, we constructed an innovative method to achieve the high-quality immortalization of bovine primary cells, thereby expanding the prospects for the future application of immortalized bovine model cell lines.
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Affiliation(s)
- Zihan Zhang
- College of Veterinary Medicine, Northwest A&F University, Xianyang 712100, China; (Z.Z.); (Z.H.); (Y.G.); (X.L.)
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture and Rural Affairs, Northwest A&F University, Xianyang 712100, China
| | - Zhuo Han
- College of Veterinary Medicine, Northwest A&F University, Xianyang 712100, China; (Z.Z.); (Z.H.); (Y.G.); (X.L.)
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture and Rural Affairs, Northwest A&F University, Xianyang 712100, China
| | - Ying Guo
- College of Veterinary Medicine, Northwest A&F University, Xianyang 712100, China; (Z.Z.); (Z.H.); (Y.G.); (X.L.)
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture and Rural Affairs, Northwest A&F University, Xianyang 712100, China
| | - Xin Liu
- College of Veterinary Medicine, Northwest A&F University, Xianyang 712100, China; (Z.Z.); (Z.H.); (Y.G.); (X.L.)
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture and Rural Affairs, Northwest A&F University, Xianyang 712100, China
| | - Yuanpeng Gao
- College of Veterinary Medicine, Northwest A&F University, Xianyang 712100, China; (Z.Z.); (Z.H.); (Y.G.); (X.L.)
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture and Rural Affairs, Northwest A&F University, Xianyang 712100, China
- Correspondence: (Y.G.); (Y.Z.)
| | - Yong Zhang
- College of Veterinary Medicine, Northwest A&F University, Xianyang 712100, China; (Z.Z.); (Z.H.); (Y.G.); (X.L.)
- Key Laboratory of Animal Biotechnology, Ministry of Agriculture and Rural Affairs, Northwest A&F University, Xianyang 712100, China
- Correspondence: (Y.G.); (Y.Z.)
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Xu W, Cui J, Liu B, Yang L. An Event-Specific Real-Time PCR Method for Measuring Transgenic Lysozyme Goat Content in Trace Samples. Foods 2021; 10:foods10050925. [PMID: 33922422 PMCID: PMC8146569 DOI: 10.3390/foods10050925] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 03/23/2021] [Accepted: 03/27/2021] [Indexed: 12/26/2022] Open
Abstract
Lysozymes are used in sterilisation, antisepsis, dairy additives, inflammation, and cancer. One transgenic goat line expressing high levels of human lysozyme (hLZ) in goat milk has been developed in China. Herein, we established an event-specific real-time polymerase chain reaction (real-time PCR) method to detect the transgenic hLZ goat line. The developed method has high specificity, sensitivity and accuracy, and a wide quantitative dynamic range. The limit of detection and limit of quantification was 5 and 10 copies per reaction, respectively. The practical sample analysis results showed that the method could identify and quantify transgenic lysozyme content in trace samples in routine lab analyses. Furthermore, the potential applicability in risk assessment, such as molecular characterisation and gene horizontal transfer, was confirmed. We believe that this method is suitable for the detection of transgenic hLZ goat line and its derivate.
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Affiliation(s)
- Wenting Xu
- Joint International Research Laboratory, Metabolic and Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China;
| | - Jinjie Cui
- State Key Laboratory, Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, China;
| | - Biao Liu
- Key Laboratory on Biosafety, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China;
| | - Litao Yang
- Joint International Research Laboratory, Metabolic and Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China;
- Correspondence:
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Yuan M, Zhang J, Gao Y, Yuan Z, Zhu Z, Wei Y, Wu T, Han J, Zhang Y. HMEJ-based safe-harbor genome editing enables efficient generation of cattle with increased resistance to tuberculosis. J Biol Chem 2021; 296:100497. [PMID: 33675752 PMCID: PMC8038940 DOI: 10.1016/j.jbc.2021.100497] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Revised: 02/17/2021] [Accepted: 03/01/2021] [Indexed: 12/26/2022] Open
Abstract
The CRISPR/Cas9 system has been used in a wide range of applications in the production of gene-edited animals and plants. Most efforts to insert genes have relied on homology-directed repair (HDR)-mediated integration, but this strategy remains inefficient for the production of gene-edited livestock, especially monotocous species such as cattle. Although efforts have been made to improve HDR efficiency, other strategies have also been proposed to circumvent these challenges. Here we demonstrate that a homology-mediated end-joining (HMEJ)-based method can be used to create gene-edited cattle that displays precise integration of a functional gene at the ROSA26 locus. We found that the HMEJ-based method increased the knock-in efficiency of reporter genes by eightfold relative to the traditional HDR-based method in bovine fetal fibroblasts. Moreover, we identified the bovine homology of the mouse Rosa26 locus that is an accepted genomic safe harbor and produced three live-born gene-edited cattle with higher rates of pregnancy and birth, compared with previous work. These gene-edited cattle exhibited predictable expression of the functional gene natural resistance-associated macrophage protein-1 (NRAMP1), a metal ion transporter that should and, in our experiments does, increase resistance to bovine tuberculosis, one of the most detrimental zoonotic diseases. This research contributes to the establishment of a safe and efficient genome editing system and provides insights for gene-edited animal breeding.
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Affiliation(s)
- Mengke Yuan
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China; Key Laboratory of Animal Biotechnology, Ministry of Agriculture and Rural Affairs, Northwest A&F University, Yangling, Shaanxi, China
| | - Jingcheng Zhang
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China; Key Laboratory of Animal Biotechnology, Ministry of Agriculture and Rural Affairs, Northwest A&F University, Yangling, Shaanxi, China
| | - Yuanpeng Gao
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China; Key Laboratory of Animal Biotechnology, Ministry of Agriculture and Rural Affairs, Northwest A&F University, Yangling, Shaanxi, China
| | - Zikun Yuan
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China; Key Laboratory of Animal Biotechnology, Ministry of Agriculture and Rural Affairs, Northwest A&F University, Yangling, Shaanxi, China
| | - Zhenliang Zhu
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China; Key Laboratory of Animal Biotechnology, Ministry of Agriculture and Rural Affairs, Northwest A&F University, Yangling, Shaanxi, China
| | - Yongke Wei
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China; Key Laboratory of Animal Biotechnology, Ministry of Agriculture and Rural Affairs, Northwest A&F University, Yangling, Shaanxi, China
| | - Teng Wu
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China; Key Laboratory of Animal Biotechnology, Ministry of Agriculture and Rural Affairs, Northwest A&F University, Yangling, Shaanxi, China
| | - Jing Han
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China; Key Laboratory of Animal Biotechnology, Ministry of Agriculture and Rural Affairs, Northwest A&F University, Yangling, Shaanxi, China
| | - Yong Zhang
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China; Key Laboratory of Animal Biotechnology, Ministry of Agriculture and Rural Affairs, Northwest A&F University, Yangling, Shaanxi, China.
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7
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Eun K, Hong N, Jeong YW, Park MG, Hwang SU, Jeong YIK, Choi EJ, Olsson PO, Hwang WS, Hyun SH, Kim H. Transcriptional activities of human elongation factor-1α and cytomegalovirus promoter in transgenic dogs generated by somatic cell nuclear transfer. PLoS One 2020; 15:e0233784. [PMID: 32492024 PMCID: PMC7269240 DOI: 10.1371/journal.pone.0233784] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Accepted: 05/12/2020] [Indexed: 11/30/2022] Open
Abstract
Recent advances in somatic cell nuclear transfer (SCNT) in canines facilitate the production of canine transgenic models. Owing to the importance of stable and strong promoter activity in transgenic animals, we tested human elongation factor 1α (hEF1α) and cytomegalovirus (CMV) promoter sequences in SCNT transgenic dogs. After transfection, transgenic donor fibroblasts with the hEF1α-enhanced green fluorescence protein (EGFP) transgene were successfully isolated using fluorescence-activated cell sorting (FACS). We obtained four puppies, after SCNT, and identified three puppies as being transgenic using PCR analysis. Unexpectedly, EGFP regulated by hEF1α promoter was not observed at the organismal and cellular levels in these transgenic dogs. EGFP expression was rescued by the inhibition of DNA methyltransferases, implying that the hEF1α promoter is silenced by DNA methylation. Next, donor cells with CMV-EGFP transgene were successfully established and SCNT was performed. Three puppies of six born puppies were confirmed to be transgenic. Unlike hEF1α-regulated EGFP, CMV-regulated EGFP was strongly detectable at both the organismal and cellular levels in all transgenic dogs, even after 19 months. In conclusion, our study suggests that the CMV promoter is more suitable, than the hEF1α promoter, for stable transgene expression in SCNT-derived transgenic canine model.
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Affiliation(s)
- Kiyoung Eun
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seongbuk-gu, Seoul, Republic of Korea
- Institute of Animal Molecular Biotechnology, Korea University, Seongbuk-gu, Seoul, Republic of Korea
| | - Nayoung Hong
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seongbuk-gu, Seoul, Republic of Korea
- Institute of Animal Molecular Biotechnology, Korea University, Seongbuk-gu, Seoul, Republic of Korea
| | - Yeon Woo Jeong
- Sooam Biotech Research Foundation, Guro-gu, Seoul, Republic of Korea
| | - Min Gi Park
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seongbuk-gu, Seoul, Republic of Korea
- Institute of Animal Molecular Biotechnology, Korea University, Seongbuk-gu, Seoul, Republic of Korea
| | - Seon-Ung Hwang
- Laboratory of Veterinary Embryology and Biotechnology, College of Veterinary Medicine, Chungbuk National University, Seowon-gu, Cheongju, Republic of Korea
- Institute of Stem Cell & Regenerative Medicine, Chungbuk National University, Seowon-gu, Cheongju, Republic of Korea
| | - Yeon I. K. Jeong
- Sooam Biotech Research Foundation, Guro-gu, Seoul, Republic of Korea
| | - Eun Ji Choi
- Sooam Biotech Research Foundation, Guro-gu, Seoul, Republic of Korea
| | - P. Olof Olsson
- Sooam Biotech Research Foundation, Guro-gu, Seoul, Republic of Korea
| | - Woo Suk Hwang
- Sooam Biotech Research Foundation, Guro-gu, Seoul, Republic of Korea
| | - Sang-Hwan Hyun
- Laboratory of Veterinary Embryology and Biotechnology, College of Veterinary Medicine, Chungbuk National University, Seowon-gu, Cheongju, Republic of Korea
- Institute of Stem Cell & Regenerative Medicine, Chungbuk National University, Seowon-gu, Cheongju, Republic of Korea
- * E-mail: (SHH); (HK)
| | - Hyunggee Kim
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seongbuk-gu, Seoul, Republic of Korea
- Institute of Animal Molecular Biotechnology, Korea University, Seongbuk-gu, Seoul, Republic of Korea
- * E-mail: (SHH); (HK)
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Establishment of an electroporation-mediated gene delivery system in porcine spermatogonial stem cells. In Vitro Cell Dev Biol Anim 2019; 55:177-188. [PMID: 30725355 DOI: 10.1007/s11626-019-00326-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Accepted: 01/18/2019] [Indexed: 10/27/2022]
Abstract
Spermatogonial stem cells (SSCs) are a useful tool for the generation of genetically modified transgenic sperm. As a result, the transfer of specific genes into the cytoplasm of SSCs is crucial for the successful generation of transgenic sperm. Here, we report electroporation conditions optimized for SSCs derived from the porcine testis. The highest transfection efficiency and cell viability were observed in porcine SSCs transfected with 1 μg transgenic vector with a single electric pulse from an electroporator at a voltage of 100 V and a capacitor setting of 250 μF. The transfection efficiency and cell viability were constant regardless of the size of the transgenic vector. Furthermore, we did not detect loss of spermatozoa differentiation potential in the transfected porcine SSCs. From these results, we confirm that this electroporation-based gene delivery system can effectively introduce foreign DNA into the genome of porcine SSCs without any loss of the original porcine SSC characteristics, which will be important in the generation of mosaicism-free transgenic pigs produced from transgenic porcine sperm.
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9
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Successful genetic modification of porcine spermatogonial stem cells via an electrically responsive Au nanowire injector. Biomaterials 2019; 193:22-29. [DOI: 10.1016/j.biomaterials.2018.12.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 11/06/2018] [Accepted: 12/07/2018] [Indexed: 12/13/2022]
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Analysis of differential gene expression by RNA-seq data in ABCG1 knockout mice. Gene 2018; 689:24-33. [PMID: 30528268 DOI: 10.1016/j.gene.2018.11.086] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 10/05/2018] [Accepted: 11/22/2018] [Indexed: 12/20/2022]
Abstract
AIMS The previous studies on ABCG1 using genetically modified mice showed inconsistent results on atherosclerosis. The aim of this study was to determine whether accurate target knockout of ABCG1 would result in transcriptional changes of other atherosclerosis-related genes. METHODS ABCG1 knockout mouse model was obtained by precise gene targeting without affecting non-target DNA sequences in C57BL/6 background. The wildtype C57BL/6 mice were regarded as control group. 12-week-old male mice were used in current study. We performed whole transcriptome analysis on the peripheral blood mononuclear cells obtained from ABCG1 knockout mice (n = 3) and their wildtype controls (n = 3) by RNA-seq. RESULTS Compared with wildtype group, 605 genes were modified at the time of ABCG1 knockout and expressed differentially in knockout group, including 306 up-regulated genes and 299 down-regulated genes. 54 genes were associated with metabolism regulation, of which 13 were related to lipid metabolism. We also found some other modified genes in knockout mice involved in cell adhesion, leukocyte transendothelial migration and apoptosis, which might also play roles in the process of atherosclerosis. 7 significantly enriched GO terms and 19 significantly enriched KEGG pathways were identified, involving fatty acid biosynthesis, immune response and intracellular signal transduction. CONCLUSIONS ABCG1 knockout mice exhibited an altered expression of multiple genes related to many aspects of atherosclerosis, which might affect the further studies to insight into the effect of ABCG1 on atherosclerosis with this animal model.
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Jafarnejad A, Zandi M, Aminafshar M, Sanjabi MR, Emamjomeh Kashan N. Evaluating bovine sperm transfection using a high-performance polymer reagent and assessing the fertilizing capacity of transfected spermatozoa using an in vitro fertilization technique. Arch Anim Breed 2018. [DOI: 10.5194/aab-61-351-2018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Abstract. Sperm-mediated gene transfer (SMGT) has been considered as an innovative
device for transgenesis on a mass scale by taking advantage of live
spermatozoa to transfer exogenous DNA. However, the fertilizing ability of
transfected sperm cells and the poor reproducibility of this method are still
matters of controversy. Hence, the current study was conducted to evaluate
transfecting the enhanced green fluorescent protein (EGFP) as the source of
exogenous DNA into bovine spermatozoa using a high-performance polymer
reagent as well as assessing the fertilizing capacity of transfected sperm
cells by in vitro fertilization (IVF). In the first experiment, three
different concentrations of rhodamine-labeled DNA and high-performance
polymer transfection reagent, X-tremeGENE HP, were used to transfect bovine
spermatozoa. In the second experiment, IVF and fluorescence microscopy
methods were utilized to assess the fertilizing capacity of sperm cells
carrying exogenous DNA when X-tremeGENE HP was used either alone or with
dimethyl sulfoxide (DMSO) treatment. Findings revealed that at 1 µL
X-tremeGENE HP and 1 µg of DNA concentration, approximately
one-third of total spermatozoa were transfected. However, following IVF and
fluorescence microscopy, no EGFP expression was detected in zygotes and
morula-stage embryos. Results of this study showed that, although X-tremeGENE
HP could transfer EGFP to bovine spermatozoa, transfected sperm cells were
unable to transfer foreign DNA to matured bovine oocytes. Under our
experimental conditions, we hypothesized that the absence of the EGFP
fluorescence signal in embryos could be due to the detrimental effects of
transfection treatments on sperm cells' fertility performance as well as
incompetency of IVF to produce transgenic embryos using transfected sperm
cells.
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12
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Erard M, Dupré-Crochet S, Nüße O. Biosensors for spatiotemporal detection of reactive oxygen species in cells and tissues. Am J Physiol Regul Integr Comp Physiol 2018; 314:R667-R683. [PMID: 29341828 DOI: 10.1152/ajpregu.00140.2017] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Redox biology has become a major issue in numerous areas of physiology. Reactive oxygen species (ROS) have a broad range of roles from signal transduction to growth control and cell death. To understand the nature of these roles, accurate measurement of the reactive compounds is required. An increasing number of tools for ROS detection is available; however, the specificity and sensitivity of these tools are often insufficient. Furthermore, their specificity has been rarely evaluated in complex physiological conditions. Many ROS probes are sensitive to environmental conditions in particular pH, which may interfere with ROS detection and cause misleading results. Accurate detection of ROS in physiology and pathophysiology faces additional challenges concerning the precise localization of the ROS and the timing of their production and disappearance. Certain ROS are membrane permeable, and certain ROS probes move across cells and organelles. Targetable ROS probes such as fluorescent protein-based biosensors are required for accurate localization. Here we analyze these challenges in more detail, provide indications on the strength and weakness of current tools for ROS detection, and point out developments that will provide improved ROS detection methods in the future. There is no universal method that fits all situations in physiology and cell biology. A detailed knowledge of the ROS probes is required to choose the appropriate method for a given biological problem. The knowledge of the shortcomings of these probes should also guide the development of new sensors.
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Affiliation(s)
- Marie Erard
- Université Paris-Sud, Université Paris-Saclay , Orsay , France.,Centre National de la Recherche Scientifique, Laboratoire de Chimie Physique , Orsay , France
| | - Sophie Dupré-Crochet
- Université Paris-Sud, Université Paris-Saclay , Orsay , France.,Centre National de la Recherche Scientifique, Laboratoire de Chimie Physique , Orsay , France
| | - Oliver Nüße
- Centre National de la Recherche Scientifique, Laboratoire de Chimie Physique , Orsay , France
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13
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Eriksson S, Jonas E, Rydhmer L, Röcklinsberg H. Invited review: Breeding and ethical perspectives on genetically modified and genome edited cattle. J Dairy Sci 2017; 101:1-17. [PMID: 29102147 DOI: 10.3168/jds.2017-12962] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Accepted: 08/29/2017] [Indexed: 12/12/2022]
Abstract
The hot topic of genetic modification and genome editing is sometimes presented as a rapid solution to various problems in the field of animal breeding and genetics. These technologies hold potential for future use in agriculture but we need to be aware of difficulties in large-scale application and integration in breeding schemes. In this review, we discuss applications of both classical genetic modifications (GM) using vectors and genome editing in dairy cattle breeding. We use an interdisciplinary approach considering both ethical and animal breeding perspectives. Decisions on how to make use of these techniques need to be made based not only on what is possible, but on what is reasonable to do. Principles of animal integrity, naturalness, risk perception, and animal welfare issues are examples of ethically relevant factors to consider. These factors also influence public perception and decisions about regulations by authorities. We need to acknowledge that we lack complete understanding of the genetic background of complex traits. It may be difficult, therefore, to predict the full effect of certain modifications in large-scale breeding programs. We present 2 potential applications: genome editing to dispense with dehorning, and insertion of human genes in bovine genomes to improve udder health as an example of classical GM. Both of these cases could be seen as beneficial for animal welfare but they differ in other aspects. In the former case, a genetic variant already present within the species is introduced, whereas in the latter case, transgenic animals are generated-this difference may influence how society regards the applications. We underline that the use of GM, as well as genome editing, of farm animals such as cattle is not independent of the context, and should be considered as part of an entire process, including, for example, the assisted reproduction technology that needs to be used. We propose that breeding organizations and breeding companies should take an active role in ethical discussions about the use of these techniques and thereby signal to society that these questions are being responsibly addressed.
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Affiliation(s)
- S Eriksson
- Department of Animal Breeding and Genetics, Swedish University of Agricultural Sciences, 75007 Uppsala, Sweden.
| | - E Jonas
- Department of Animal Breeding and Genetics, Swedish University of Agricultural Sciences, 75007 Uppsala, Sweden
| | - L Rydhmer
- Department of Animal Breeding and Genetics, Swedish University of Agricultural Sciences, 75007 Uppsala, Sweden
| | - H Röcklinsberg
- Department of Animal Environment and Health, 75007 Uppsala, Sweden
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Kong S, Li L, Zhu W, Xin L, Ruan J, Zhang Y, Yang S, Li K. Genetic characteristics of polycistronic system‑mediated randomly‑inserted multi‑transgenes in miniature pigs and mice. Mol Med Rep 2017; 17:37-50. [PMID: 29115474 PMCID: PMC5780143 DOI: 10.3892/mmr.2017.7842] [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: 11/13/2016] [Accepted: 06/28/2017] [Indexed: 11/24/2022] Open
Abstract
Multi-transgenic technology is superior to single transgenic technology in biological and medical research. Multi-transgene insertion mediated by a polycistronic system is more effective for the integration of polygenes. The multi-transgene insertion patterns and manners of inheritance are not completely understood. Copy number quantification is one available approach for addressing this issue. The present study determined copy numbers in two multi-transgenic mice (K3 and L3) and two multi-transgenic miniature pigs (Z2 and Z3) using absolute quantitative polymerase chain reaction analysis. For the F0 generation, a given transgene was able to exhibit different copy number integration capacities in different individuals. For the F1 generation, the most notable characteristic was that the copy number proportions were different among pedigrees (P<0.05). The results of the present study demonstrated that transgenes within the same vector exhibited the same integration trend between the F0 and F1 generations. In conclusion, intraspecific consistency and intergenerational copy numbers were compared and the integration capacity of each specific transgene differed in multi-transgenic animals. In particular, the copy number of one transgene may not be used to represent other transgenes in polycistronic vector-mediated multi-transgenic organisms. Consequently, in multi-transgenic experimental animal disease model research or breeding, copy numbers provide an important reference. Therefore, each transgene in multi-transgenic animals must be separately screened to prevent large copy number differences, and inconsistent expression between transgenes and miscellaneous data, in subsequent research.
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Affiliation(s)
- Siyuan Kong
- State Key Laboratory of Animal Nutrition, Key Laboratory of Farm Animal Genetic Resource and Germplasm Innovation of Ministry of Agriculture, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, P.R. China
| | - Li Li
- State Key Laboratory of Animal Nutrition, Key Laboratory of Farm Animal Genetic Resource and Germplasm Innovation of Ministry of Agriculture, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, P.R. China
| | - Wenjuan Zhu
- State Key Laboratory of Animal Nutrition, Key Laboratory of Farm Animal Genetic Resource and Germplasm Innovation of Ministry of Agriculture, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, P.R. China
| | - Leilei Xin
- State Key Laboratory of Animal Nutrition, Key Laboratory of Farm Animal Genetic Resource and Germplasm Innovation of Ministry of Agriculture, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, P.R. China
| | - Jinxue Ruan
- State Key Laboratory of Animal Nutrition, Key Laboratory of Farm Animal Genetic Resource and Germplasm Innovation of Ministry of Agriculture, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, P.R. China
| | - Yubo Zhang
- Animal Functional Genomics Group, Agricultural Genomes Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, Guangdong 518120, P.R. China
| | - Shulin Yang
- State Key Laboratory of Animal Nutrition, Key Laboratory of Farm Animal Genetic Resource and Germplasm Innovation of Ministry of Agriculture, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, P.R. China
| | - Kui Li
- State Key Laboratory of Animal Nutrition, Key Laboratory of Farm Animal Genetic Resource and Germplasm Innovation of Ministry of Agriculture, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, P.R. China
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Zuo Q, Jin K, Song J, Zhang Y, Li B. Cloning, expression pattern analysis, and subcellular localization of Capra hircus SCD1 gene with production of transgenic mice. J Cell Biochem 2017; 119:2240-2247. [PMID: 28914467 DOI: 10.1002/jcb.26386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Accepted: 08/23/2017] [Indexed: 11/07/2022]
Abstract
This study aimed to clone the Stearoyl-CoA desaturase 1 (SCD1) gene derived from Xuhuai goat (Capra hircus), and analyze the sub-cellular localization in cells and tissues. The cDNA was cloned by reverse transcription polymerase chain reaction (RT-PCR). pEGFP-SCD1 vector was constructed to detect sub-cellular localization and tissue distribution. pEGFP-SCD1 was transfected into NIH-3T3 cells using polyethylene imine (PEI) and observed under fluorescence inversion microscope system 48 h after transfection. The expression level of SCD1 was detected by RT-PCR. Testicular injection was used to produce transgenic mice with goat SCD1 gene. DNA and protein were extracted from the tail tissue of F1 mice. The expression of exogenous gene in the F1 generation was detected in both DNA and protein. The results showed that the coding sequence (CDS) fragments of C. hircus SCD1 gene was 1074 bp and encodes 360 amino acids. RT-PCR results showed that SCD1 could be expressed successfully in NIH-3T3 cells in vitro. Sub-cellular localization analysis showed that pEGFP-SCD1 fusion protein located in the cytoplasm. It can be concluded that transgenic mice with goat SCD1 expressed in sperm and tail tissue was successfully produced in the F1 mice generation.
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Affiliation(s)
- Qisheng Zuo
- Key Laboratory of Animal Breeding Reproduction and Molecular Design for Jiangsu Province, College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Kai Jin
- Key Laboratory of Animal Breeding Reproduction and Molecular Design for Jiangsu Province, College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Jiuzhou Song
- Animal and Avian Sciences, University of Maryland, College Park, Maryland
| | - Yani Zhang
- Key Laboratory of Animal Breeding Reproduction and Molecular Design for Jiangsu Province, College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Bichun Li
- Key Laboratory of Animal Breeding Reproduction and Molecular Design for Jiangsu Province, College of Animal Science and Technology, Yangzhou University, Yangzhou, China
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Zhang W, Bailey-Elkin BA, Knaap RCM, Khare B, Dalebout TJ, Johnson GG, van Kasteren PB, McLeish NJ, Gu J, He W, Kikkert M, Mark BL, Sidhu SS. Potent and selective inhibition of pathogenic viruses by engineered ubiquitin variants. PLoS Pathog 2017; 13:e1006372. [PMID: 28542609 PMCID: PMC5451084 DOI: 10.1371/journal.ppat.1006372] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Revised: 05/31/2017] [Accepted: 04/23/2017] [Indexed: 12/20/2022] Open
Abstract
The recent Middle East respiratory syndrome coronavirus (MERS-CoV), Ebola and Zika virus outbreaks exemplify the continued threat of (re-)emerging viruses to human health, and our inability to rapidly develop effective therapeutic countermeasures. Many viruses, including MERS-CoV and the Crimean-Congo hemorrhagic fever virus (CCHFV) encode deubiquitinating (DUB) enzymes that are critical for viral replication and pathogenicity. They bind and remove ubiquitin (Ub) and interferon stimulated gene 15 (ISG15) from cellular proteins to suppress host antiviral innate immune responses. A variety of viral DUBs (vDUBs), including the MERS-CoV papain-like protease, are responsible for cleaving the viral replicase polyproteins during replication, and are thereby critical components of the viral replication cycle. Together, this makes vDUBs highly attractive antiviral drug targets. However, structural similarity between the catalytic cores of vDUBs and human DUBs complicates the development of selective small molecule vDUB inhibitors. We have thus developed an alternative strategy to target the vDUB activity through a rational protein design approach. Here, we report the use of phage-displayed ubiquitin variant (UbV) libraries to rapidly identify potent and highly selective protein-based inhibitors targeting the DUB domains of MERS-CoV and CCHFV. UbVs bound the vDUBs with high affinity and specificity to inhibit deubiquitination, deISGylation and in the case of MERS-CoV also viral replicative polyprotein processing. Co-crystallization studies further revealed critical molecular interactions between UbVs and MERS-CoV or CCHFV vDUBs, accounting for the observed binding specificity and high affinity. Finally, expression of UbVs during MERS-CoV infection reduced infectious progeny titers by more than four orders of magnitude, demonstrating the remarkable potency of UbVs as antiviral agents. Our results thereby establish a strategy to produce protein-based inhibitors that could protect against a diverse range of viruses by providing UbVs via mRNA or protein delivery technologies or through transgenic techniques. Emerging viruses pose a tremendous challenge to human health. While vaccine-based approaches are desirable in terms of infection prevention in the longer term, alternative antiviral strategies are needed, especially when providing treatment options for infected patients during acute outbreaks. Here we applied protein engineering technology to target virus-encoded deubiquitinating enzymes of two viruses with significant impact on human health: Middle East respiratory syndrome coronavirus (MERS-CoV) and Crimean-Congo hemorrhagic fever virus (CCHFV). This resulted in the rapid identification of ubiquitin variant (UbV) inhibitors that bound with high affinity and specificity to the viral deubiquitinating enzymes. These proteins inhibited the catalytic activities of the deubiquitinating enzymes and almost completely blocked MERS-CoV infection. This work provides proof-of-principle that structurally diverse, virus-specific deubiquitinating enzymes can be selectively targeted through rational protein design technology, and therefore opens new avenues for quickly developed molecularly tailored therapy across a broad spectrum of viral pathogens that infect humans, livestock and plants.
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Affiliation(s)
- Wei Zhang
- Donnelly Centre for Cellular and Biomolecular Research, Banting and Best Department of Medical Research, and Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
| | - Ben A. Bailey-Elkin
- Department of Microbiology, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Robert C. M. Knaap
- Department of Medical Microbiology, Leiden University Medical Center, Leiden, The Netherlands
| | - Baldeep Khare
- Department of Microbiology, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Tim J. Dalebout
- Department of Medical Microbiology, Leiden University Medical Center, Leiden, The Netherlands
| | - Garrett G. Johnson
- Department of Microbiology, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Puck B. van Kasteren
- Department of Medical Microbiology, Leiden University Medical Center, Leiden, The Netherlands
| | - Nigel J. McLeish
- Department of Microbiology, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Jun Gu
- Donnelly Centre for Cellular and Biomolecular Research, Banting and Best Department of Medical Research, and Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
| | - Wenguang He
- Department of Microbiology, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Marjolein Kikkert
- Department of Medical Microbiology, Leiden University Medical Center, Leiden, The Netherlands
- * E-mail: (MK); (BLM); (SSS)
| | - Brian L. Mark
- Department of Microbiology, University of Manitoba, Winnipeg, Manitoba, Canada
- * E-mail: (MK); (BLM); (SSS)
| | - Sachdev S. Sidhu
- Donnelly Centre for Cellular and Biomolecular Research, Banting and Best Department of Medical Research, and Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
- * E-mail: (MK); (BLM); (SSS)
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Yang C, Shang X, Cheng L, Yang L, Liu X, Bai C, Wei Z, Hua J, Li G. DNMT 1 maintains hypermethylation of CAG promoter specific region and prevents expression of exogenous gene in fat-1 transgenic sheep. PLoS One 2017; 12:e0171442. [PMID: 28158319 PMCID: PMC5291418 DOI: 10.1371/journal.pone.0171442] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Accepted: 01/20/2017] [Indexed: 02/06/2023] Open
Abstract
Methylation is an important issue in gene expression regulation and also in the fields of genetics and reproduction. In this study, we created fat-1 transgenic sheep, investigated the fine-mapping and the modulatory mechanisms of promoter methylation. Sheep fetal fibroblasts were transfected by pCAG-fat1-IRES-EGFP. Monoclonal cell line was screened as nuclear donor and carried out nuclear transfer (441 transgenic cloned embryos, 52 synchronism recipient sheep). Six offsprings were obtained. Expressions of exogenous genes fat-1 and EGFP were detectable in 10 examined tissues and upregulated omega-3 fatty acid content. Interestingly, more or less EGFP negative cells were detectable in the positive transgenic fetal skin cells. EGFP negative and positive cells were sorted by flow cytometry, and their methylation status in the whole promoter region (1701 nt) were investigated by bisulphate sequencing. The fine-mapping of methylation in CAG promoter were proposed. The results suggested that exogenous gene expression was determined by the methylation status from 721–1346 nt and modulated by methylation levels at 101, 108 and 115 nt sites in CAG promoter. To clarify the regulatory mechanism of methylation, examination of four DNA methyltransferases (DNMTs) demonstrated that hypermethylation of CAG promoter is mainly maintained by DNMT 1 in EGFP negative cells. Furthermore, investigation of the cell surface antigen CD34, CD45 and CD166 indicated that EGFP positive and negative cells belong to different types. The present study systematically clarified methylation status of CAG promoter in transgenic sheep and regulatory mechanism, which will provide research strategies for gene expression regulation in transgenic animals.
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Affiliation(s)
- Chunrong Yang
- Research Center for Laboratory Animal Science, Inner Mongolia University, Hohhot, China
- College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Xueying Shang
- College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Lei Cheng
- Research Center for Laboratory Animal Science, Inner Mongolia University, Hohhot, China
| | - Lei Yang
- Research Center for Laboratory Animal Science, Inner Mongolia University, Hohhot, China
| | - Xuefei Liu
- Research Center for Laboratory Animal Science, Inner Mongolia University, Hohhot, China
| | - Chunling Bai
- Research Center for Laboratory Animal Science, Inner Mongolia University, Hohhot, China
| | - Zhuying Wei
- Research Center for Laboratory Animal Science, Inner Mongolia University, Hohhot, China
| | - Jinlian Hua
- College of Veterinary Medicine, Northwest A&F University, Yangling, China
| | - Guangpeng Li
- Research Center for Laboratory Animal Science, Inner Mongolia University, Hohhot, China
- * E-mail:
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Zorriehzah MJ, Tiwari R, Sachan S, Karthik K, Malik YS, Dadar M, Sarwar M, Sayab M, Dhama K. Avian Egg Yolk Antibodies (IgY) and their Potential Therapeutic
Applications for Countering Infectious Diseases of Fish and
Aquatic Animals. INT J PHARMACOL 2016. [DOI: 10.3923/ijp.2016.760.768] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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19
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Zhang M, Zheng Y, Chen W, Zhang Y, Guo Z, Zhang Y, Liu J. Identifying an optimal promoter sequence of goat β-lactoglobulin gene for constructing high-expression vectors in mammary epithelial cells. Small Rumin Res 2015. [DOI: 10.1016/j.smallrumres.2015.08.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Zou S, Tang M, He X, Cao Y, Zhao J, Xu W, Liang Z, Huang K. A 90-day subchronic study of rats fed lean pork from genetically modified pigs with muscle-specific expression of recombinant follistatin. Regul Toxicol Pharmacol 2015; 73:620-8. [PMID: 26363208 DOI: 10.1016/j.yrtph.2015.09.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Revised: 09/04/2015] [Accepted: 09/05/2015] [Indexed: 10/23/2022]
Abstract
Because cardiovascular disease incidence has rapidly increased in recent years, people are choosing relatively healthier diets with low animal fat. A transgenic pig with low fat and a high percentage of lean meat was created in 2011; this pig overexpresses the follistatin (FST) gene. To evaluate the safety of lean pork derived from genetically modified (GM) pigs, a subchronic oral toxicity study was conducted using Sprague-Dawley rats. GM pork and non-GM pork were incorporated into the diet at levels of 3.75%, 7.5%, and 15% (w/w), and the main nutrients of the various diets were subsequently balanced. The safety of GM pork was assessed by comparison of the toxicology response variables in Sprague-Dawley rats consuming diets containing GM pork with those consuming non-GM pork. No treatment-related adverse or toxic effects were observed based on an examination of the daily clinical signs, body weight, food consumption, hematology, serum biochemistry, and organ weight or based on gross and histopathological examination. The results demonstrate that GM pork is as safe for consumption as conventional pork.
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Affiliation(s)
- Shiying Zou
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Min Tang
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Xiaoyun He
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China; The Supervision, Inspection and Testing Center of Genetically Modified Organisms, Ministry of Agriculture, Beijing, 100083, China
| | - Yuan Cao
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Jie Zhao
- College of Biological Science, China Agricultural University, Beijing, 100083, China
| | - Wentao Xu
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China; The Supervision, Inspection and Testing Center of Genetically Modified Organisms, Ministry of Agriculture, Beijing, 100083, China
| | - Zhihong Liang
- The Supervision, Inspection and Testing Center of Genetically Modified Organisms, Ministry of Agriculture, Beijing, 100083, China
| | - Kunlun Huang
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China; The Supervision, Inspection and Testing Center of Genetically Modified Organisms, Ministry of Agriculture, Beijing, 100083, China.
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Aponte PM. Spermatogonial stem cells: Current biotechnological advances in reproduction and regenerative medicine. World J Stem Cells 2015; 7:669-680. [PMID: 26029339 PMCID: PMC4444608 DOI: 10.4252/wjsc.v7.i4.669] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Revised: 03/13/2015] [Accepted: 04/14/2015] [Indexed: 02/06/2023] Open
Abstract
Spermatogonial stem cells (SSCs) are the germ stem cells of the seminiferous epithelium in the testis. Through the process of spermatogenesis, they produce sperm while concomitantly keeping their cellular pool constant through self-renewal. SSC biology offers important applications for animal reproduction and overcoming human disease through regenerative therapies. To this end, several techniques involving SSCs have been developed and will be covered in this article. SSCs convey genetic information to the next generation, a property that can be exploited for gene targeting. Additionally, SSCs can be induced to become embryonic stem cell-like pluripotent cells in vitro. Updates on SSC transplantation techniques with related applications, such as fertility restoration and preservation of endangered species, are also covered on this article. SSC suspensions can be transplanted to the testis of an animal and this has given the basis for SSC functional assays. This procedure has proven technically demanding in large animals and men. In parallel, testis tissue xenografting, another transplantation technique, was developed and resulted in sperm production in testis explants grafted into ectopical locations in foreign species. Since SSC culture holds a pivotal role in SSC biotechnologies, current advances are overviewed. Finally, spermatogenesis in vitro, already demonstrated in mice, offers great promises to cope with reproductive issues in the farm animal industry and human clinical applications.
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Bosch P, Forcato DO, Alustiza FE, Alessio AP, Fili AE, Olmos Nicotra MF, Liaudat AC, Rodríguez N, Talluri TR, Kues WA. Exogenous enzymes upgrade transgenesis and genetic engineering of farm animals. Cell Mol Life Sci 2015; 72:1907-29. [PMID: 25636347 PMCID: PMC11114025 DOI: 10.1007/s00018-015-1842-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Revised: 01/15/2015] [Accepted: 01/16/2015] [Indexed: 01/14/2023]
Abstract
Transgenic farm animals are attractive alternative mammalian models to rodents for the study of developmental, genetic, reproductive and disease-related biological questions, as well for the production of recombinant proteins, or the assessment of xenotransplants for human patients. Until recently, the ability to generate transgenic farm animals relied on methods of passive transgenesis. In recent years, significant improvements have been made to introduce and apply active techniques of transgenesis and genetic engineering in these species. These new approaches dramatically enhance the ease and speed with which livestock species can be genetically modified, and allow to performing precise genetic modifications. This paper provides a synopsis of enzyme-mediated genetic engineering in livestock species covering the early attempts employing naturally occurring DNA-modifying proteins to recent approaches working with tailored enzymatic systems.
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Affiliation(s)
- Pablo Bosch
- Departamento de Biología Molecular, Facultad de Ciencias Exactas, Fco-Qcas y Naturales, Universidad Nacional de Río Cuarto, Río Cuarto, Córdoba Republic of Argentina
| | - Diego O. Forcato
- Departamento de Biología Molecular, Facultad de Ciencias Exactas, Fco-Qcas y Naturales, Universidad Nacional de Río Cuarto, Río Cuarto, Córdoba Republic of Argentina
| | - Fabrisio E. Alustiza
- Departamento de Biología Molecular, Facultad de Ciencias Exactas, Fco-Qcas y Naturales, Universidad Nacional de Río Cuarto, Río Cuarto, Córdoba Republic of Argentina
| | - Ana P. Alessio
- Departamento de Biología Molecular, Facultad de Ciencias Exactas, Fco-Qcas y Naturales, Universidad Nacional de Río Cuarto, Río Cuarto, Córdoba Republic of Argentina
| | - Alejandro E. Fili
- Departamento de Biología Molecular, Facultad de Ciencias Exactas, Fco-Qcas y Naturales, Universidad Nacional de Río Cuarto, Río Cuarto, Córdoba Republic of Argentina
| | - María F. Olmos Nicotra
- Departamento de Biología Molecular, Facultad de Ciencias Exactas, Fco-Qcas y Naturales, Universidad Nacional de Río Cuarto, Río Cuarto, Córdoba Republic of Argentina
| | - Ana C. Liaudat
- Departamento de Biología Molecular, Facultad de Ciencias Exactas, Fco-Qcas y Naturales, Universidad Nacional de Río Cuarto, Río Cuarto, Córdoba Republic of Argentina
| | - Nancy Rodríguez
- Departamento de Biología Molecular, Facultad de Ciencias Exactas, Fco-Qcas y Naturales, Universidad Nacional de Río Cuarto, Río Cuarto, Córdoba Republic of Argentina
| | - Thirumala R. Talluri
- Friedrich-Loeffler-Institute, Institute of Farm Animal Genetics, Biotechnology, 31535 Neustadt, Germany
| | - Wilfried A. Kues
- Friedrich-Loeffler-Institute, Institute of Farm Animal Genetics, Biotechnology, 31535 Neustadt, Germany
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Li M, Li L, Zhang J, Verma V, Liu Q, Shi D, Huang B. An Insight on Small Molecule Induced Foot-Print Free Naive Pluripotent Stem Cells in Livestock. ACTA ACUST UNITED AC 2015. [DOI: 10.4236/scd.2015.51001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Holehonnur R, Luong JA, Chaturvedi D, Ho A, Lella SK, Hosek MP, Ploski JE. Adeno-associated viral serotypes produce differing titers and differentially transduce neurons within the rat basal and lateral amygdala. BMC Neurosci 2014; 15:28. [PMID: 24533621 PMCID: PMC3937004 DOI: 10.1186/1471-2202-15-28] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2013] [Accepted: 02/11/2014] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND In recent years, there has been an increased interest in using recombinant adeno-associated viruses (AAV) to make localized genetic manipulations within the rodent brain. Differing serotypes of AAV possess divergent capsid protein sequences and these variations greatly influence each serotype's ability to transduce particular cell types and brain regions. We therefore aimed to determine the AAV serotype that is optimal for targeting neurons within the Basal and Lateral Amygdala (BLA) since the transduction efficiency of AAV has not been previously examined within the BLA. This region is desirable to genetically manipulate due to its role in emotion, learning & memory, and numerous psychiatric disorders. We accomplished this by screening 9 different AAV serotypes (AAV2/1, AAV2/2, AAV2/5, AAV2/7, AAV2/8, AAV2/9, AAV2/rh10, AAV2/DJ and AAV2/DJ8) designed to express red fluorescent protein (RFP) under the regulation of an alpha Ca2+/calmodulin-dependent protein kinase II promoter (αCaMKII). RESULTS We determined that these serotypes produce differing amounts of virus under standard laboratory production. Notably AAV2/2 consistently produced the lowest titers compared to the other serotypes examined. These nine serotypes were bilaterally infused into the rat BLA at the highest titers achieved for each serotype and at a normalized titer of 7.8E + 11 GC/ml. Twenty one days following viral infusion the degree of transduction was quantitated throughout the amygdala. These viruses exhibited differential transduction of neurons within the BLA. AAV2/7 exhibited a trend toward having the highest efficiency of transduction and AAV2/5 exhibited significantly lower transduction efficiency as compared to the serotypes examined. AAV2/5's decreased ability to transduce BLA neurons correlates with its significantly different capsid protein sequences as compared to the other serotypes examined. CONCLUSIONS For laboratories producing their own recombinant adeno-associated viruses, the use of AAV2/2 is likely less desirable since AAV2/2 produces significantly lower titers than many other serotypes of AAV. Numerous AAV serotypes appear to efficiently transduce BLA neurons, with the exception of AAV2/5. Taking into consideration the ability of certain serotypes to achieve high titers and transduce BLA neurons well, in our hands AAV2/DJ8 and AAV2/9 appear to be ideal serotypes to use when targeting neurons within the BLA.
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Affiliation(s)
- Roopashri Holehonnur
- School of Behavioral and Brain Sciences and the Department of Molecular & Cell Biology, University of Texas at Dallas, 800 West Campbell RD, Richardson, TX 75080, USA
| | - Jonathan A Luong
- School of Behavioral and Brain Sciences and the Department of Molecular & Cell Biology, University of Texas at Dallas, 800 West Campbell RD, Richardson, TX 75080, USA
| | - Dushyant Chaturvedi
- School of Behavioral and Brain Sciences and the Department of Molecular & Cell Biology, University of Texas at Dallas, 800 West Campbell RD, Richardson, TX 75080, USA
| | - Anthony Ho
- School of Behavioral and Brain Sciences and the Department of Molecular & Cell Biology, University of Texas at Dallas, 800 West Campbell RD, Richardson, TX 75080, USA
| | - Srihari K Lella
- School of Behavioral and Brain Sciences and the Department of Molecular & Cell Biology, University of Texas at Dallas, 800 West Campbell RD, Richardson, TX 75080, USA
| | - Matthew P Hosek
- School of Behavioral and Brain Sciences and the Department of Molecular & Cell Biology, University of Texas at Dallas, 800 West Campbell RD, Richardson, TX 75080, USA
| | - Jonathan E Ploski
- School of Behavioral and Brain Sciences and the Department of Molecular & Cell Biology, University of Texas at Dallas, 800 West Campbell RD, Richardson, TX 75080, USA
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Wu Y, Liu J, Guo H, Luo Q, Yu Z, Liao E, Zu X. Establishment of OPG Transgenic Mice and the Effect of OPG on Bone Microarchitecture. Int J Endocrinol 2013; 2013:125932. [PMID: 23606836 PMCID: PMC3623394 DOI: 10.1155/2013/125932] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2013] [Accepted: 02/05/2013] [Indexed: 01/27/2023] Open
Abstract
Osteoprotegerin (OPG) plays a determinant role in regulating bone metabolism, but the effect of OPG on bone microarchitecture needs to be further elucidated. We attempted to construct pCI-hOPGp-mOPG vector containing human OPG promoter and FLAG tag and to microinject vector into fertilized zygotes from C57BL/6J × CBA mice to prepare transgenic mice. The OPG transgenic positive mice were identified by PCR and western blotting. Twelve-week-old OPG transgenic mice (OPG-Tg mice) and wild-type mice (WT mice) were utilized in the study of bone microarchitecture. Microcomputed tomography (micro-CT) data showed that compared with WT mice, the tibia of OPG-Tg mice showed an increased volumetric BMD (vBMD), tissue BMD (tBMD), trabecular thickness (Tb.Th), and trabecular number (Tb.N), and a decreased trabecular separation (Th.Sp) (P < 0.05) . The cortical bone microarchitecture parameters, such as cortical area (Ct.Ar), cortical thickness (Ct.Th), cortical BMD (Ct.BMD), cortical BMC (Ct.BMC), BMD, and BMC of femur, were increased, and the inner perimeter (In.Pm) was decreased, in OPG-Tg mice, compared to those in WT mice (P < 0.05). The established OPG transgenic mouse model could be valuable for further studying the biological significance and gene regulation of OPG in vivo.
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Affiliation(s)
- Ying Wu
- Department of Metabolism and Endocrinology, The First Affiliated Hospital of University of South China, Hengyang, Hunan 421000, China
- Institute of Clinical Medicine, The First Affiliated Hospital of University of South China, Hengyang, Hunan 421000, China
| | - Jianghua Liu
- Department of Metabolism and Endocrinology, The First Affiliated Hospital of University of South China, Hengyang, Hunan 421000, China
- Institute of Clinical Medicine, The First Affiliated Hospital of University of South China, Hengyang, Hunan 421000, China
| | - Hui Guo
- Department of Metabolism and Endocrinology, The First Affiliated Hospital of University of South China, Hengyang, Hunan 421000, China
| | - Qiong Luo
- Department of Metabolism and Endocrinology, The First Affiliated Hospital of University of South China, Hengyang, Hunan 421000, China
| | - Ziying Yu
- Department of Metabolism and Endocrinology, The First Affiliated Hospital of University of South China, Hengyang, Hunan 421000, China
| | - Eryuan Liao
- Institute of Metabolism and Endocrinology, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
| | - Xuyu Zu
- Department of Metabolism and Endocrinology, The First Affiliated Hospital of University of South China, Hengyang, Hunan 421000, China
- Institute of Clinical Medicine, The First Affiliated Hospital of University of South China, Hengyang, Hunan 421000, China
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