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Tusé D, McNulty M, McDonald KA, Buchman LW. A review and outlook on expression of animal proteins in plants. FRONTIERS IN PLANT SCIENCE 2024; 15:1426239. [PMID: 39239203 PMCID: PMC11374769 DOI: 10.3389/fpls.2024.1426239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2024] [Accepted: 06/25/2024] [Indexed: 09/07/2024]
Abstract
This review delves into the multifaceted technologies, benefits and considerations surrounding the expression of animal proteins in plants, emphasizing its potential role in advancing global nutrition, enhancing sustainability, while being mindful of the safety considerations. As the world's population continues to grow and is projected to reach 9 billion people by 2050, there is a growing need for alternative protein sources that can meet nutritional demands while minimizing environmental impact. Plant expression of animal proteins is a cutting-edge biotechnology approach that allows crops to produce proteins traditionally derived from animals, offering a sustainable and resource-efficient manner of producing these proteins that diversifies protein production and increases food security. In the United States, it will be important for there to be clear guidance in order for these technologies to reach consumers. As consumer demand for sustainable and alternative food sources rise, biotechnologies can offer economic opportunities, making this emerging technology a key player in the market landscape.
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Affiliation(s)
- Daniel Tusé
- DT/Consulting Group, Sacramento, CA, United States
| | - Matthew McNulty
- Center for Cellular Agriculture, Tufts University, Medford, MA, United States
| | - Karen A McDonald
- Department of Chemical Engineering and Global Healthshare Initiative, University of California, Davis, Davis, CA, United States
| | - Leah W Buchman
- Biotechniology Innovation Organization, Agriculture and Environment, Washington, DC, United States
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2
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Wang M, Schedel M, Gelfand EW. Gene editing in allergic diseases: Identification of novel pathways and impact of deleting allergen genes. J Allergy Clin Immunol 2024; 154:51-58. [PMID: 38555980 PMCID: PMC11227406 DOI: 10.1016/j.jaci.2024.03.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Revised: 02/14/2024] [Accepted: 03/04/2024] [Indexed: 04/02/2024]
Abstract
Gene editing technology has emerged as a powerful tool in all aspects of health research and continues to advance our understanding of critical and essential elements in disease pathophysiology. The clustered regularly interspaced short palindromic repeats (CRISPR) gene editing technology has been used with precision to generate gene knockouts, alter genes, and identify genes that cause disease. The full spectrum of allergic/atopic diseases, in part because of shared pathophysiology, is ripe for studies with this technology. In this way, novel culprit genes are being identified and allow for manipulation of triggering allergens to reduce allergenicity and disease. Notwithstanding current limitations on precision and potential off-target effects, newer approaches are rapidly being introduced to more fully understand specific gene functions as well as the consequences of genetic manipulation. In this review, we examine the impact of editing technologies of novel genes relevant to peanut allergy and asthma as well as how gene modification of common allergens may lead to the deletion of allergenic proteins.
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Affiliation(s)
- Meiqin Wang
- Department of Pediatrics, Division of Cell Biology, National Jewish Health, Denver, Colo
| | - Michaela Schedel
- Department of Pediatrics, Division of Cell Biology, National Jewish Health, Denver, Colo; Department of Pulmonary Medicine, University Hospital Essen-Ruhrlandklinik, Essen, Germany; Department of Pulmonary Medicine, University Hospital, Essen, Germany
| | - Erwin W Gelfand
- Department of Pediatrics, Division of Cell Biology, National Jewish Health, Denver, Colo.
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3
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Tara A, Singh P, Gautam D, Tripathi G, Uppal C, Malhotra S, De S, Singh MK, Telugu BP, Selokar NL. CRISPR-mediated editing of β-lactoglobulin (BLG) gene in buffalo. Sci Rep 2024; 14:14822. [PMID: 38937564 PMCID: PMC11211398 DOI: 10.1038/s41598-024-65359-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Accepted: 06/19/2024] [Indexed: 06/29/2024] Open
Abstract
Milk is a good source of nutrition but is also a source of allergenic proteins such as α-lactalbumin, β-lactoglobulin (BLG), casein, and immunoglobulins. The Clustered Regularly Interspaced Short Palindromic Repeats (CRISPR)/Cas technology has the potential to edit any gene, including milk allergens. Previously, CRISPR/Cas has been successfully employed in dairy cows and goats, but buffaloes remain unexplored for any milk trait. In this study, we utilized the CRISPR/Cas9 system to edit the major milk allergen BLG gene in buffaloes. First, the editing efficiency of designed sgRNAs was tested in fibroblast cells using the T7E assay and Sanger sequencing. The most effective sgRNA was selected to generate clonal lines of BLG-edited cells. Analysis of 15 single-cell clones, through TA cloning and Sanger sequencing, revealed that 7 clones exhibited bi-allelic (-/-) heterozygous, bi-allelic (-/-) homozygous, and mono-allelic (-/+) disruptions in BLG. Bioinformatics prediction analysis confirmed that non-multiple-of-3 edited nucleotide cell clones have frame shifts and early truncation of BLG protein, while multiple-of-3 edited nucleotides resulted in slightly disoriented protein structures. Somatic cell nuclear transfer (SCNT) method was used to produce blastocyst-stage embryos that have similar developmental rates and quality with wild-type embryos. This study demonstrated the successful bi-allelic editing (-/-) of BLG in buffalo cells through CRISPR/Cas, followed by the production of BLG-edited blastocyst stage embryos using SCNT. With CRISPR and SCNT methods described herein, our long-term goal is to generate gene-edited buffaloes with BLG-free milk.
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Affiliation(s)
- Aseem Tara
- Animal Biotechnology Division (ABTD), ICAR-National Dairy Research Institute, Karnal, Haryana, 132001, India
| | - Priyanka Singh
- Animal Biotechnology Division (ABTD), ICAR-National Dairy Research Institute, Karnal, Haryana, 132001, India
| | - Devika Gautam
- Animal Biotechnology Division (ABTD), ICAR-National Dairy Research Institute, Karnal, Haryana, 132001, India
| | - Gaurav Tripathi
- Animal Biotechnology Division (ABTD), ICAR-National Dairy Research Institute, Karnal, Haryana, 132001, India
| | - Chirag Uppal
- Animal Biotechnology Division (ABTD), ICAR-National Dairy Research Institute, Karnal, Haryana, 132001, India
| | - Shreya Malhotra
- Animal Biotechnology Division (ABTD), ICAR-National Dairy Research Institute, Karnal, Haryana, 132001, India
| | - Sacchinandan De
- Animal Biotechnology Division (ABTD), ICAR-National Dairy Research Institute, Karnal, Haryana, 132001, India
| | - Manoj K Singh
- Animal Biotechnology Division (ABTD), ICAR-National Dairy Research Institute, Karnal, Haryana, 132001, India
| | - Bhanu P Telugu
- Division of Animal Science, University of Missouri, Columbia, MO, 65211, USA
| | - Naresh L Selokar
- Animal Biotechnology Division (ABTD), ICAR-National Dairy Research Institute, Karnal, Haryana, 132001, India.
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Miklau M, Burn SJ, Eckerstorfer M, Dolezel M, Greiter A, Heissenberger A, Hörtenhuber S, Zollitsch W, Hagen K. Horizon scanning of potential environmental applications of terrestrial animals, fish, algae and microorganisms produced by genetic modification, including the use of new genomic techniques. Front Genome Ed 2024; 6:1376927. [PMID: 38938511 PMCID: PMC11208717 DOI: 10.3389/fgeed.2024.1376927] [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: 01/26/2024] [Accepted: 05/01/2024] [Indexed: 06/29/2024] Open
Abstract
With scientific progress and the development of new genomic techniques (NGTs), the spectrum of organisms modified for various purposes is rapidly expanding and includes a wide range of taxonomic groups. An improved understanding of which newly developed products may be introduced into the market and released into the environment in the near and more distant future is of particular interest for policymakers, regulatory authorities, and risk assessors. To address this information need, we conducted a horizon scanning (HS) of potential environmental applications in four groups of organisms: terrestrial animals (excluding insects and applications with gene drives), fish, algae and microorganisms. We applied a formal scoping review methodology comprising a structured search of the scientific literature followed by eligibility screening, complemented by a survey of grey literature, and regulatory websites and databases. In all four groups of organisms we identified a broad range of potential applications in stages of basic as well as advanced research, and a limited number of applications which are on, or ready to be placed on, the market. Research on GM animals including fish is focused on farmed animals and primarily targets traits which increase performance, influence reproduction, or convey resistance against diseases. GM algae identified in the HS were all unicellular, with more than half of the articles concerning biofuel production. GM algae applications for use in the environment include biocontrol and bioremediation, which are also the main applications identified for GM microorganisms. From a risk assessor's perspective these potential applications entail a multitude of possible pathways to harm. The current limited level of experience and limited amount of available scientific information could constitute a significant challenge in the near future, for which risk assessors and competent authorities urgently need to prepare.
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Affiliation(s)
- Marianne Miklau
- Department of Landuse and Biosafety, Environment Agency Austria, Vienna, Austria
| | - Sarah-Joe Burn
- Department of Sustainable Agricultural Systems, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Michael Eckerstorfer
- Department of Landuse and Biosafety, Environment Agency Austria, Vienna, Austria
| | - Marion Dolezel
- Department of Landuse and Biosafety, Environment Agency Austria, Vienna, Austria
| | - Anita Greiter
- Department of Landuse and Biosafety, Environment Agency Austria, Vienna, Austria
| | | | - Stefan Hörtenhuber
- Department of Sustainable Agricultural Systems, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Werner Zollitsch
- Department of Sustainable Agricultural Systems, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Kristin Hagen
- Federal Agency for Nature Conservation, Division Assessment Synthetic Biology/Enforcement Genetic Engineering Act, Bonn, Germany
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Mishu MA, Nath SK, Sohidullah M, Hossain MT. Advancement of animal and poultry nutrition: Harnessing the power of CRISPR-Cas genome editing technology. J Adv Vet Anim Res 2024; 11:483-493. [PMID: 39101073 PMCID: PMC11296187 DOI: 10.5455/javar.2024.k798] [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: 05/02/2024] [Revised: 05/31/2024] [Accepted: 06/02/2024] [Indexed: 08/06/2024] Open
Abstract
CRISPR-associated proteins and clustered regularly interspaced short palindromic repeats (CRISPR-Cas) technology has emerged as a groundbreaking advancement in animal and poultry nutrition to improve feed conversion efficiency, enhance disease resistance, and improve the nutritional quality of animal products. Despite significant advancements, there is a research gap in the systematic understanding and comprehensive use of the CRISPR-Cas method in animal and poultry nutrition. The purpose of this study is to elucidate the latest advancements in animal and poultry nutrition through CRISPR-Cas genome editing technology, focusing on gene manipulation in metabolism, immunity, and growth. Following preferred reporting items in meta-analysis and systematic reviews guidelines, we conducted a systematic search using several databases, including Scopus, PubMed, and Web of Science, until May 2024, and finally, we included a total of 108 articles in this study. This article explores the use of the CRISPR-Cas system in the advancement of feed additives like probiotics and enzymes, which could reduce the use of antibiotics in animal production. Furthermore, the article discusses ethical and regulatory issues related to gene editing in animal and poultry nutrition, including concerns about animal welfare, food safety, and environmental impacts. Overall, the CRISPR-Cas system holds substantial promise to overcome the challenges in modern animal agriculture. By enriching the nutritional quality of animal products, increasing disease resistance, and improving feed efficiency, it offers sustainable and cost-effective solutions that can revolutionize animal and poultry nutrition.
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Affiliation(s)
- Mahbuba Akther Mishu
- Department of Agricultural Finance, Co-operatives and Banking, Khulna Agricultural University, Khulna, Bangladesh
| | - Sabuj Kanti Nath
- Department of Animal Nutrition, Khulna Agricultural University, Khulna, Bangladesh
| | - M. Sohidullah
- Department of Microbiology and Public Health, Khulna Agricultural University, Khulna, Bangladesh
| | - Md. Taslim Hossain
- Department of Animal Nutrition, Khulna Agricultural University, Khulna, Bangladesh
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Li D, Guo R, Chen F, Wang J, Wang F, Wan Y. Genetically Engineered Goats as Efficient Mammary Gland Bioreactors for Production of Recombinant Human Neutrophil Peptide 1 Using CRISPR/Cas9. BIOLOGY 2024; 13:367. [PMID: 38927247 PMCID: PMC11200946 DOI: 10.3390/biology13060367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Revised: 05/16/2024] [Accepted: 05/21/2024] [Indexed: 06/28/2024]
Abstract
Mammary gland bioreactors are promising methods for recombinant protein production. Human neutrophil peptide 1 (HNP1) exhibits antibacterial and immune-modulating properties. This study aims to establish a method to generate goats secreting HNP1 using the mammary gland as bioreactors. HNP1 transgenic goats were generated by using CRISPR/Cas9 technology to knock-in (KI) the HNP1 sequence into exon 7 of the goat β-casein (CSN2) gene under the control of the CSN2 promoter. One-cell stage embryos were cytoplasmically injected with a mixture of Cas9 mRNA, sgRNA, and a homologous plasmid including the T2A-HNP1 sequences, followed by transfer to recipient goats. A total of 22 live offspring goats were delivered, and 21 of these goats (95.45%) exhibited targeted edits at the CSN2 locus, and 2 female goats (9.09%) demonstrated successful HNP1 integration. Western blot and ELISA analyses confirmed the presence of HNP1 protein at high levels in the milk of these HNP1-positive goats, with mean concentrations of 22.10 µg/mL and 0.0092 µg/mL during the initial 60 days of lactation. Furthermore, milk from these transgenic goats exhibited notable antibacterial activity against Escherichia coli and Staphylococcus aureus, demonstrating the functionality of the expressed HNP1 protein. In conclusion, we established an efficient method for developing new transgenic goat lines as a mammary gland bioreactor, and the bioactive HNP1 protein secreted by the transgenic goat has the potential to combat microbial resistance.
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Affiliation(s)
- Dongxu Li
- Jiangsu Livestock Embryo Engineering Laboratory, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China; (D.L.); (J.W.)
| | - Rihong Guo
- Jiangsu Provincial Engineering Research Center for Precision Animal Breeding, Nanjing 210014, China; (R.G.); (F.C.)
- Institute of Animal Science, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Fang Chen
- Jiangsu Provincial Engineering Research Center for Precision Animal Breeding, Nanjing 210014, China; (R.G.); (F.C.)
- Institute of Animal Science, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Jingang Wang
- Jiangsu Livestock Embryo Engineering Laboratory, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China; (D.L.); (J.W.)
| | - Feng Wang
- Jiangsu Livestock Embryo Engineering Laboratory, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China; (D.L.); (J.W.)
| | - Yongjie Wan
- Jiangsu Livestock Embryo Engineering Laboratory, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China; (D.L.); (J.W.)
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7
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Yuan YG, Liu SZ, Farhab M, Lv MY, Zhang T, Cao SX. Genome editing: An insight into disease resistance, production efficiency, and biomedical applications in livestock. Funct Integr Genomics 2024; 24:81. [PMID: 38709433 DOI: 10.1007/s10142-024-01364-5] [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: 03/04/2024] [Revised: 04/29/2024] [Accepted: 05/01/2024] [Indexed: 05/07/2024]
Abstract
One of the primary concerns for the survival of the human species is the growing demand for food brought on by an increasing global population. New developments in genome-editing technology present promising opportunities for the growth of wholesome and prolific farm animals. Genome editing in large animals is used for a variety of purposes, including biotechnology to improve food production, animal health, and pest management, as well as the development of animal models for fundamental research and biomedicine. Genome editing entails modifying genetic material by removing, adding, or manipulating particular DNA sequences from a particular locus in a way that does not happen naturally. The three primary genome editors are CRISPR/Cas 9, TALENs, and ZFNs. Each of these enzymes is capable of precisely severing nuclear DNA at a predetermined location. One of the most effective inventions is base editing, which enables single base conversions without the requirement for a DNA double-strand break (DSB). As reliable methods for precise genome editing in studies involving animals, cytosine and adenine base editing are now well-established. Effective zygote editing with both cytosine and adenine base editors (ABE) has resulted in the production of animal models. Both base editors produced comparable outcomes for the precise editing of point mutations in somatic cells, advancing the field of gene therapy. This review focused on the principles, methods, recent developments, outstanding applications, the advantages and disadvantages of ZFNs, TALENs, and CRISPR/Cas9 base editors, and prime editing in diverse lab and farm animals. Additionally, we address the methodologies that can be used for gene regulation, base editing, and epigenetic alterations, as well as the significance of genome editing in animal models to better reflect real disease. We also look at methods designed to increase the effectiveness and precision of gene editing tools. Genome editing in large animals is used for a variety of purposes, including biotechnology to improve food production, animal health, and pest management, as well as the development of animal models for fundamental research and biomedicine. This review is an overview of the existing knowledge of the principles, methods, recent developments, outstanding applications, the advantages and disadvantages of zinc finger nucleases (ZFNs), transcription-activator-like endonucleases (TALENs), and clustered regularly interspaced short palindromic repeats associated protein 9 (CRISPR/Cas 9), base editors and prime editing in diverse lab and farm animals, which will offer better and healthier products for the entire human race.
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Affiliation(s)
- Yu-Guo Yuan
- College of Veterinary Medicine/Key Laboratory of Animal Genetic Engineering, Yangzhou University, Yangzhou, 225009, Jiangsu, China.
- Jiangsu Co-Innovation Center of Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, 225009, Jiangsu, China.
| | - Song-Zi Liu
- College of Veterinary Medicine/Key Laboratory of Animal Genetic Engineering, Yangzhou University, Yangzhou, 225009, Jiangsu, China
- Jiangsu Co-Innovation Center of Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, 225009, Jiangsu, China
| | - Muhammad Farhab
- College of Veterinary Medicine/Key Laboratory of Animal Genetic Engineering, Yangzhou University, Yangzhou, 225009, Jiangsu, China
- Jiangsu Co-Innovation Center of Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, 225009, Jiangsu, China
| | - Mei-Yun Lv
- College of Veterinary Medicine/Key Laboratory of Animal Genetic Engineering, Yangzhou University, Yangzhou, 225009, Jiangsu, China
- Jiangsu Co-Innovation Center of Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, 225009, Jiangsu, China
| | - Ting Zhang
- School of Animal Husbandry and Veterinary Medicine, Jiangsu Vocational College of Agriculture and Forestry, Jurong, 212499, China
| | - Shao-Xiao Cao
- Institute of Animal Science, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China
- Jiangsu Provincial Engineering Research Center for Precision animal Breeding, Nanjing, 210014, China
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8
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Pomés A, Smith SA, Chruszcz M, Mueller GA, Brackett NF, Chapman MD. Precision engineering for localization, validation, and modification of allergenic epitopes. J Allergy Clin Immunol 2024; 153:560-571. [PMID: 38181840 PMCID: PMC10939758 DOI: 10.1016/j.jaci.2023.12.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 12/20/2023] [Accepted: 12/29/2023] [Indexed: 01/07/2024]
Abstract
The allergen-IgE interaction is essential for the genesis of allergic responses, yet investigation of the molecular basis of these interactions is in its infancy. Precision engineering has unveiled the molecular features of allergen-antibody interactions at the atomic level. High-resolution technologies, including x-ray crystallography, nuclear magnetic resonance spectroscopy, and cryo-electron microscopy, determine allergen-antibody structures. X-ray crystallography of an allergen-antibody complex localizes in detail amino acid residues and interactions that define the epitope-paratope interface. Multiple structures involving murine IgG mAbs have recently been resolved. The number of amino acids forming the epitope broadly correlates with the epitope area. The production of human IgE mAbs from B cells of allergic subjects is an exciting recent development that has for the first time enabled an actual IgE epitope to be defined. The biologic activity of defined IgE epitopes can be validated in vivo in animal models or by measuring mediator release from engineered basophilic cell lines. Finally, gene-editing approaches using the Clustered Regularly Interspaced Short Palindromic Repeats technology to either remove allergen genes or make targeted epitope engineering at the source are on the horizon. This review presents an overview of the identification and validation of allergenic epitopes by precision engineering.
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Affiliation(s)
| | - Scott A Smith
- Vanderbilt University Medical Center, Nashville, Tenn
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Liu S, Liu H, Wang X, Shi L. The immune system of prokaryotes: potential applications and implications for gene editing. Biotechnol J 2024; 19:e2300352. [PMID: 38403433 DOI: 10.1002/biot.202300352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 11/30/2023] [Accepted: 12/28/2023] [Indexed: 02/27/2024]
Abstract
Gene therapy has revolutionized the treatment of genetic diseases. Spearheading this revolution are sophisticated genome editing methods such as TALENs, ZFNs, and CRISPR-Cas, which trace their origins back to prokaryotic immune systems. Prokaryotes have developed various antiviral defense systems to combat viral attacks and the invasion of genetic elements. The comprehension of these defense mechanisms has paved the way for the development of indispensable tools in molecular biology. Among them, restriction endonuclease originates from the innate immune system of bacteria. The CRISPR-Cas system, a widely applied genome editing technology, is derived from the prokaryotic adaptive immune system. Single-base editing is a precise editing tool based on CRISPR-Cas system that involves deamination of target base. It is worth noting that prokaryotes possess deamination enzymes as part of their defense arsenal over foreign genetic material. Furthermore, prokaryotic Argonauts (pAgo) proteins, also function in anti-phage defense, play an important role in complementing the CRISPR-Cas system by addressing certain limitations it may have. Recent studies have also shed light on the significance of Retron, a reverse transcription transposon previously showed potential in genome editing, has also come to light in the realm of prokaryotic immunity. These noteworthy findings highlight the importance of studying prokaryotic immune system for advancing genome editing techniques. Here, both the origin of prokaryotic immunity underlying aforementioned genome editing tools, and potential applications of deaminase, pAgo protein and reverse transcriptase in genome editing among prokaryotes were introduced, thus emphasizing the fundamental mechanism and significance of prokaryotic immunity.
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Affiliation(s)
- Siyang Liu
- School of Life Sciences, Chongqing University, Chongqing, China
| | - Hongling Liu
- School of Life Sciences, Chongqing University, Chongqing, China
| | - Xue Wang
- School of Life Sciences, Chongqing University, Chongqing, China
| | - Lei Shi
- School of Life Sciences, Chongqing University, Chongqing, China
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Menchaca A. Assisted Reproductive Technologies (ART) and genome editing to support a sustainable livestock. Anim Reprod 2023; 20:e20230074. [PMID: 37720722 PMCID: PMC10503885 DOI: 10.1590/1984-3143-ar2023-0074] [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: 05/26/2023] [Accepted: 07/21/2023] [Indexed: 09/19/2023] Open
Abstract
This article provides an overview of assisted reproductive technologies (ART) and genome engineering to improve livestock production systems for the contribution of global sustainability. Most ruminant production systems are conducted on grassland conditions, as is the case of South American countries that are leaders in meat and milk production worldwide with a well-established grass-feed livestock. These systems have many strengths from an environmental perspective and consumer preferences but requires certain improvements to enhance resource efficiency. Reproductive performance is one of the main challenges particularly in cow-calf operations that usually are conducted under adverse conditions and thus ART can make a great contribution. Fixed-time artificial insemination is applied in South America in large scale programs as 20 to 30% of cows receive this technology every year in each country, with greater calving rate and significant herd genetic gain occurred in this region. Sexed semen has also been increasingly implemented, enhancing resource efficiency by a) obtaining desired female replacement and improving animal welfare by avoiding newborn male sacrifice in dairy industry, or b) alternatively producing male calves for beef industry. In vitro embryo production has been massively applied, with this region showing the greatest number of embryos produced worldwide leading to significant improvement in herd genetics and productivity. Although the contribution of these technologies is considerable, further improvements will be required for a significant livestock transformation and novel biotechnologies such as genome editing are already available. Through the CRISPR/Cas-based system it is possible to enhance food yield and quality, avoid animal welfare concerns, overcome animal health threats, and control pests and invasive species harming food production. In summary, a significant enhancement in livestock productivity and resource efficiency can be made through reproductive technologies and genome editing, improving at the same time profitability for farmers, and global food security and sustainability.
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Affiliation(s)
- Alejo Menchaca
- Plataforma de Salud Animal, Instituto Nacional de Investigación Agropecuaria, Montevideo, Uruguay
- Fundación Instituto de Reproducción Animal Uruguay, Montevideo, Uruguay
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11
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Ebrahimi S, Khosravi MA, Raz A, Karimipoor M, Parvizi P. CRISPR-Cas Technology as a Revolutionary Genome Editing tool: Mechanisms and Biomedical Applications. IRANIAN BIOMEDICAL JOURNAL 2023; 27:219-46. [PMID: 37873636 PMCID: PMC10707817 DOI: 10.61186/ibj.27.5.219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Accepted: 06/14/2023] [Indexed: 12/17/2023]
Abstract
Programmable nucleases are powerful genomic tools for precise genome editing. These tools precisely recognize, remove, or change DNA at a defined site, thereby, stimulating cellular DNA repair pathways that can cause mutations or accurate replacement or deletion/insertion of a sequence. CRISPR-Cas9 system is the most potent and useful genome editing technique adapted from the defense immune system of certain bacteria and archaea against viruses and phages. In the past decade, this technology made notable progress, and at present, it has largely been used in genome manipulation to make precise gene editing in plants, animals, and human cells. In this review, we aim to explain the basic principle, mechanisms of action, and applications of this system in different areas of medicine, with emphasizing on the detection and treatment of parasitic diseases.
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Affiliation(s)
- Sahar Ebrahimi
- Molecular Systematics Laboratory, Parasitology Department, Pasteur Institute of Iran, Tehran, Iran
- Molecular Medicine Department, Biotechnology Research Center (BRC), Pasteur Institute of Iran, Tehran, Iran
| | - Mohammad Ali Khosravi
- Molecular Medicine Department, Biotechnology Research Center (BRC), Pasteur Institute of Iran, Tehran, Iran
| | - Abbasali Raz
- Malaria and Vector Research Group (MVRG), Biotechnology Research Center (BRC), Pasteur Institute of Iran, Tehran, Iran
| | - Morteza Karimipoor
- Molecular Medicine Department, Biotechnology Research Center (BRC), Pasteur Institute of Iran, Tehran, Iran
| | - Parviz Parvizi
- Molecular Systematics Laboratory, Parasitology Department, Pasteur Institute of Iran, Tehran, Iran
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12
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Yamashita MS, Melo EO. Animal Transgenesis and Cloning: Combined Development and Future Perspectives. Methods Mol Biol 2023; 2647:121-149. [PMID: 37041332 DOI: 10.1007/978-1-0716-3064-8_6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/13/2023]
Abstract
The revolution in animal transgenesis began in 1981 and continues to become more efficient, cheaper, and faster to perform. New genome editing technologies, especially CRISPR-Cas9, are leading to a new era of genetically modified or edited organisms. Some researchers advocate this new era as the time of synthetic biology or re-engineering. Nonetheless, we are witnessing advances in high-throughput sequencing, artificial DNA synthesis, and design of artificial genomes at a fast pace. These advances in symbiosis with animal cloning by somatic cell nuclear transfer (SCNT) allow the development of improved livestock, animal models of human disease, and heterologous production of bioproducts for medical applications. In the context of genetic engineering, SCNT remains a useful technology to generate animals from genetically modified cells. This chapter addresses these fast-developing technologies driving this biotechnological revolution and their association with animal cloning technology.
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Affiliation(s)
- Melissa S Yamashita
- Embrapa Genetic Resources and Biotechnology, Brasília, Distrito Federal, Brazil
- Graduation Program in Animal Biology, University of Brasília, Brasília, Distrito Federal, Brazil
| | - Eduardo O Melo
- Embrapa Genetic Resources and Biotechnology, Brasília, Distrito Federal, Brazil.
- Graduation Program in Biotechnology, University of Tocantins, Gurupi, Tocantins, Brazil.
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13
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Lin Y, Li J, Li C, Tu Z, Li S, Li XJ, Yan S. Application of CRISPR/Cas9 System in Establishing Large Animal Models. Front Cell Dev Biol 2022; 10:919155. [PMID: 35656550 PMCID: PMC9152178 DOI: 10.3389/fcell.2022.919155] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Accepted: 05/02/2022] [Indexed: 11/13/2022] Open
Abstract
The foundation for investigating the mechanisms of human diseases is the establishment of animal models, which are also widely used in agricultural industry, pharmaceutical applications, and clinical research. However, small animals such as rodents, which have been extensively used to create disease models, do not often fully mimic the key pathological changes and/or important symptoms of human disease. As a result, there is an emerging need to establish suitable large animal models that can recapitulate important phenotypes of human diseases for investigating pathogenesis and developing effective therapeutics. However, traditional genetic modification technologies used in establishing small animal models are difficultly applied for generating large animal models of human diseases. This difficulty has been overcome to a great extent by the recent development of gene editing technology, especially the clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR-associated protein 9 (Cas9). In this review, we focus on the applications of CRISPR/Cas9 system to establishment of large animal models, including nonhuman primates, pigs, sheep, goats and dogs, for investigating disease pathogenesis and treatment. We also discuss the limitations of large animal models and possible solutions according to our current knowledge. Finally, we sum up the applications of the novel genome editing tool Base Editors (BEs) and its great potential for gene editing in large animals.
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14
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Brackett NF, Pomés A, Chapman MD. New Frontiers: Precise Editing of Allergen Genes Using CRISPR. FRONTIERS IN ALLERGY 2022; 2:821107. [PMID: 35386981 PMCID: PMC8974684 DOI: 10.3389/falgy.2021.821107] [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: 11/23/2021] [Accepted: 12/24/2021] [Indexed: 11/14/2022] Open
Abstract
Genome engineering with clustered regularly interspaced short palindromic repeats (CRISPR) technology offers the unique potential for unequivocally deleting allergen genes at the source. Compared to prior gene editing approaches, CRISPR boasts substantial improvements in editing efficiency, throughput, and precision. CRISPR has demonstrated success in several clinical applications such as sickle cell disease and β-thalassemia, and preliminary knockout studies of allergenic proteins using CRISPR editing show promise. Given the advantages of CRISPR, as well as specific DNA targets in the allergen genes, CRISPR gene editing is a viable approach for tackling allergy, which may lead to significant disease improvement. This review will highlight recent applications of CRISPR editing of allergens, particularly cat allergen Fel d 1, and will discuss the advantages and limitations of this approach compared to existing treatment options.
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15
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Maximiano MR, Távora FTPK, Prado GS, Dias SC, Mehta A, Franco OL. CRISPR Genome Editing Technology: A Powerful Tool Applied to Developing Agribusiness. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:6379-6395. [PMID: 34097395 DOI: 10.1021/acs.jafc.1c01062] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The natural increase of the world's population implies boosting agricultural demand. In the current non-optimistic global scenario, where adverse climate changes come associated with substantial population growth, the main challenge in agribusiness is food security. Recently, the CRISPR/Cas system has emerged as a friendly gene editing biotechnological tool, enabling a precise manipulation of genomes and enhancement of desirable traits in several organisms. This review highlights the CRISPR/Cas system as a paramount tool for the improvement of agribusiness products and brings up-to-date findings showing its potential applications in improving agricultural-related traits in major plant crops and farm animals, all representing economic-relevant commodities responsible for feeding the world. Several applied pieces of research have successfully demonstrated the CRISPR/Cas ability in boosting interesting traits in agribusiness products, including animal productivity and welfare, crop yield growth, and seed quality, reflecting positive impacts in both socioeconomics and human health aspects. Hence, the CRISPR/Cas system has revolutionized bioscience and biotechnology, and its concrete application in agribusiness goods is on the horizon.
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Affiliation(s)
- Mariana Rocha Maximiano
- S-Inova Biotech, Pós-Graduação em Biotecnologia, Universidade Católica Dom Bosco, Campo Grande, Mato Grosso do Sul 79117-900, Brazil
- Centro de Análises Proteômicas e Bioquímicas, Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, Distrito Federal 70790-160, Brazil
| | - Fabiano T P K Távora
- Embrapa Recursos Genéticos e Biotecnologia, Brasília, Distrito Federal 70770-917, Brazil
- Programa de Pós Graduação em Ciências Biológicas (Imunologia e DIP/Genética e Biotecnologia), Universidade Federal de Juiz de Fora, Juiz de Fora, Minas Gerais 36036-900, Brazil
| | - Guilherme Souza Prado
- Laboratório de Biotecnologia, Embrapa Arroz e Feijão, Goiânia, Goiás 75375-000, Brazil
| | - Simoni Campos Dias
- Centro de Análises Proteômicas e Bioquímicas, Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, Distrito Federal 70790-160, Brazil
| | - Angela Mehta
- Embrapa Recursos Genéticos e Biotecnologia, Brasília, Distrito Federal 70770-917, Brazil
| | - Octávio Luiz Franco
- S-Inova Biotech, Pós-Graduação em Biotecnologia, Universidade Católica Dom Bosco, Campo Grande, Mato Grosso do Sul 79117-900, Brazil
- Centro de Análises Proteômicas e Bioquímicas, Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, Distrito Federal 70790-160, Brazil
- Programa de Pós Graduação em Ciências Biológicas (Imunologia e DIP/Genética e Biotecnologia), Universidade Federal de Juiz de Fora, Juiz de Fora, Minas Gerais 36036-900, Brazil
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16
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Sustainable Food Production: The Contribution of Genome Editing in Livestock. SUSTAINABILITY 2021. [DOI: 10.3390/su13126788] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The growing demand for animal source foods to feed people has been pushing the livestock industry to increase productivity, a tendency that will continue throughout this century. The challenge for the coming years is to increase the food supply to ensure equity in access to high quality food, while maintaining global sustainability including combating climate change, avoiding deforestation, and conserving biodiversity, as well as ensuring animal health and welfare. The question is, how do we produce more with less? Classical methods to enhance livestock productivity based on the improvement of animal health, nutrition, genetics, reproductive technologies and management have made important contributions; however, this is not going to be enough and thus disruptive approaches are required. Genome editing with CRISPR may be a powerful contributor to global livestock transformation. This article is focused on the scope and perspectives for the application of this technology, which includes improving production traits, enhancing animal welfare through adaptation and resilience, conferring resistance to infectious diseases, and suppressing pests and invasive species that threaten livestock. The main advantages and concerns that should be overcome by science, policy and people are discussed with the aim that this technology can make a real contribution to our collective future. This review is part of the special issue “Genome Editing in Animal Systems to Support Sustainable Farming and Pest Control”.
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17
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Sawyer L. β-Lactoglobulin and Glycodelin: Two Sides of the Same Coin? Front Physiol 2021; 12:678080. [PMID: 34093238 PMCID: PMC8173191 DOI: 10.3389/fphys.2021.678080] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 04/14/2021] [Indexed: 12/22/2022] Open
Abstract
The two lipocalins, β-lactoglobulin (βLg) and glycodelin (Gd), are possibly the most closely related members of the large and widely distributed lipocalin family, yet their functions appear to be substantially different. Indeed, the function of β-lactoglobulin, a major component of ruminant milk, is still unclear although neonatal nutrition is clearly important. On the other hand, glycodelin has several specific functions in reproduction conferred through distinct, tissue specific glycosylation of the polypeptide backbone. It is also associated with some cancer outcomes. The glycodelin gene, PAEP, reflecting one of its names, progestagen-associated endometrial protein, is expressed in many though not all primates, but the name has now also been adopted for the β-lactoglobulin gene (HGNC, www.genenames.org). After a general overview of the two proteins in the context of the lipocalin family, this review considers the properties of each in the light of their physiological functional significance, supplementing earlier reviews to include studies from the past decade. While the biological function of glycodelin is reasonably well defined, that of β-lactoglobulin remains elusive.
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Affiliation(s)
- Lindsay Sawyer
- School of Biological Sciences, IQB3, The University of Edinburgh, Edinburgh, United Kingdom
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18
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Piergentili R, Del Rio A, Signore F, Umani Ronchi F, Marinelli E, Zaami S. CRISPR-Cas and Its Wide-Ranging Applications: From Human Genome Editing to Environmental Implications, Technical Limitations, Hazards and Bioethical Issues. Cells 2021; 10:cells10050969. [PMID: 33919194 PMCID: PMC8143109 DOI: 10.3390/cells10050969] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 04/18/2021] [Accepted: 04/19/2021] [Indexed: 12/14/2022] Open
Abstract
The CRISPR-Cas system is a powerful tool for in vivo editing the genome of most organisms, including man. During the years this technique has been applied in several fields, such as agriculture for crop upgrade and breeding including the creation of allergy-free foods, for eradicating pests, for the improvement of animal breeds, in the industry of bio-fuels and it can even be used as a basis for a cell-based recording apparatus. Possible applications in human health include the making of new medicines through the creation of genetically modified organisms, the treatment of viral infections, the control of pathogens, applications in clinical diagnostics and the cure of human genetic diseases, either caused by somatic (e.g., cancer) or inherited (mendelian disorders) mutations. One of the most divisive, possible uses of this system is the modification of human embryos, for the purpose of preventing or curing a human being before birth. However, the technology in this field is evolving faster than regulations and several concerns are raised by its enormous yet controversial potential. In this scenario, appropriate laws need to be issued and ethical guidelines must be developed, in order to properly assess advantages as well as risks of this approach. In this review, we summarize the potential of these genome editing techniques and their applications in human embryo treatment. We will analyze CRISPR-Cas limitations and the possible genome damage caused in the treated embryo. Finally, we will discuss how all this impacts the law, ethics and common sense.
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Affiliation(s)
- Roberto Piergentili
- Institute of Molecular Biology and Pathology, Italian National Research Council (CNR-IBPM), 00185 Rome, Italy;
| | - Alessandro Del Rio
- Department of Anatomical, Histological, Forensic, and Orthopedic Sciences, Sapienza University of Rome, 00161 Rome, Italy; (F.U.R.); (E.M.); (S.Z.)
- Correspondence: or
| | - Fabrizio Signore
- Obstetrics and Gynecology Department, USL Roma2, Sant’Eugenio Hospital, 00144 Rome, Italy;
| | - Federica Umani Ronchi
- Department of Anatomical, Histological, Forensic, and Orthopedic Sciences, Sapienza University of Rome, 00161 Rome, Italy; (F.U.R.); (E.M.); (S.Z.)
| | - Enrico Marinelli
- Department of Anatomical, Histological, Forensic, and Orthopedic Sciences, Sapienza University of Rome, 00161 Rome, Italy; (F.U.R.); (E.M.); (S.Z.)
| | - Simona Zaami
- Department of Anatomical, Histological, Forensic, and Orthopedic Sciences, Sapienza University of Rome, 00161 Rome, Italy; (F.U.R.); (E.M.); (S.Z.)
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19
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Singina GN, Sergiev PV, Lopukhov AV, Rubtsova MP, Taradajnic NP, Ravin NV, Shedova EN, Taradajnic TE, Polejaeva IA, Dozev AV, Brem G, Dontsova OA, Zinovieva NA. Production of a Cloned Offspring and CRISPR/Cas9 Genome Editing of Embryonic Fibroblasts in Cattle. DOKL BIOCHEM BIOPHYS 2021; 496:48-51. [PMID: 33689075 PMCID: PMC7946654 DOI: 10.1134/s1607672921010099] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Revised: 10/20/2020] [Accepted: 10/21/2020] [Indexed: 11/23/2022]
Abstract
Somatic Cell Nuclear Transfer (SCNT) technique was used to produce the first viable cloned cattle offspring in Russia. Whole-genome SNP genotyping confirmed that the cloned calf was identical to the fibroblast cell line that was used for SCNT. CRISPR/Cas9 approach was subsequently used to knock out genes for beta-lactoglobulin gene (PAEP) and the beta-lactoglobulin-like protein gene (LOC100848610) in the fibroblast cells. Gene editing (GE) efficiency was 4.4% for each of these genes. We successfully obtained single-cell-derived fibroblast colonies containing PAEP and LOC100848610 knockouts, which will be used to produce beta-lactoglobulin-deficient cattle.
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Affiliation(s)
- G N Singina
- Ernst Federal Science Center for Animal Husbandry, Podolsk, Russia.
| | - P V Sergiev
- Institute of Functional Genomics, Moscow State University, Moscow, Russia.,Center of Life Sciences, Skolkovo Institute of Science and Technology, Skolkovo, Russia.,Faculty of Chemistry, Moscow State University, Moscow, Russia
| | - A V Lopukhov
- Ernst Federal Science Center for Animal Husbandry, Podolsk, Russia
| | - M P Rubtsova
- Faculty of Chemistry, Moscow State University, Moscow, Russia
| | - N P Taradajnic
- Ernst Federal Science Center for Animal Husbandry, Podolsk, Russia
| | - N V Ravin
- Research Center of Biotechnology, Moscow, Russia
| | - E N Shedova
- Ernst Federal Science Center for Animal Husbandry, Podolsk, Russia
| | - T E Taradajnic
- Ernst Federal Science Center for Animal Husbandry, Podolsk, Russia
| | - I A Polejaeva
- Department of Animal, Dairy and Veterinary Sciences, Utah State University, Logan, UT, USA
| | - A V Dozev
- Ernst Federal Science Center for Animal Husbandry, Podolsk, Russia
| | - G Brem
- Department of Animal Breeding and Genetics, University of Veterinary Medicine, Vienna, Austria
| | - O A Dontsova
- Center of Life Sciences, Skolkovo Institute of Science and Technology, Skolkovo, Russia.,Faculty of Chemistry, Moscow State University, Moscow, Russia.,Belozersky Research Institute of Physico-Chemical Biology, Moscow State University, Moscow, Russia.,Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Moscow, Russia
| | - N A Zinovieva
- Ernst Federal Science Center for Animal Husbandry, Podolsk, Russia
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20
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Perisse IV, Fan Z, Singina GN, White KL, Polejaeva IA. Improvements in Gene Editing Technology Boost Its Applications in Livestock. Front Genet 2021; 11:614688. [PMID: 33603767 PMCID: PMC7885404 DOI: 10.3389/fgene.2020.614688] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Accepted: 12/07/2020] [Indexed: 12/18/2022] Open
Abstract
Accelerated development of novel CRISPR/Cas9-based genome editing techniques provides a feasible approach to introduce a variety of precise modifications in the mammalian genome, including introduction of multiple edits simultaneously, efficient insertion of long DNA sequences into specific targeted loci as well as performing nucleotide transitions and transversions. Thus, the CRISPR/Cas9 tool has become the method of choice for introducing genome alterations in livestock species. The list of new CRISPR/Cas9-based genome editing tools is constantly expanding. Here, we discuss the methods developed to improve efficiency and specificity of gene editing tools as well as approaches that can be employed for gene regulation, base editing, and epigenetic modifications. Additionally, advantages and disadvantages of two primary methods used for the production of gene-edited farm animals: somatic cell nuclear transfer (SCNT or cloning) and zygote manipulations will be discussed. Furthermore, we will review agricultural and biomedical applications of gene editing technology.
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Affiliation(s)
- Iuri Viotti Perisse
- Department of Animal, Dairy and Veterinary Sciences, Utah State University, Logan, UT, United States
| | - Zhiqiang Fan
- Department of Animal, Dairy and Veterinary Sciences, Utah State University, Logan, UT, United States
| | - Galina N. Singina
- L.K. Ernst Federal Research Center for Animal Husbandry, Podolsk, Russia
| | - Kenneth L. White
- Department of Animal, Dairy and Veterinary Sciences, Utah State University, Logan, UT, United States
| | - Irina A. Polejaeva
- Department of Animal, Dairy and Veterinary Sciences, Utah State University, Logan, UT, United States
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21
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Polkoff KM, Chung J, Simpson SG, Gleason K, Piedrahita JA. In Vitro Validation of Transgene Expression in Gene-Edited Pigs Using CRISPR Transcriptional Activators. CRISPR J 2020; 3:409-418. [PMID: 33095051 PMCID: PMC7580606 DOI: 10.1089/crispr.2020.0037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
The use of CRISPR-Cas and RNA-guided endonucleases has drastically changed research strategies for understanding and exploiting gene function, particularly for the generation of gene-edited animal models. This has resulted in an explosion in the number of gene-edited species, including highly biomedically relevant pig models. However, even with error-free DNA insertion or deletion, edited genes are occasionally not expressed and/or translated as expected. Therefore, there is a need to validate the expression outcomes gene modifications in vitro before investing in the costly generation of a gene-edited animal. Unfortunately, many gene targets are tissue specific and/or not expressed in cultured primary cells, making validation difficult without generating an animal. In this study, using pigs as a proof of concept, we show that CRISPR-dCas9 transcriptional activators can be used to validate functional transgene insertion in nonexpressing easily cultured cells such as fibroblasts. This is a tool that can be used across disciplines and animal species to save time and resources by verifying expected outcomes of gene edits before generating live animals.
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Affiliation(s)
- Kathryn M. Polkoff
- Comparative Medicine Institute, North Carolina State University, Raleigh, North Carolina, USA
- Department of Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA
| | - Jaewook Chung
- Comparative Medicine Institute, North Carolina State University, Raleigh, North Carolina, USA
- Department of Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA
| | - Sean G. Simpson
- Deparment of Animal and Avian Sciences, University of Maryland, College Park, Maryland, USA
- RenOVAte Biosciences, Inc., Reisterstown, Maryland, USA
| | - Katherine Gleason
- Comparative Medicine Institute, North Carolina State University, Raleigh, North Carolina, USA
- Department of Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA
| | - Jorge A. Piedrahita
- Comparative Medicine Institute, North Carolina State University, Raleigh, North Carolina, USA
- Department of Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA
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22
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Livestock Gene Editing by One-step Embryo Manipulation. J Equine Vet Sci 2020; 89:103025. [PMID: 32563448 DOI: 10.1016/j.jevs.2020.103025] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 04/06/2020] [Accepted: 04/07/2020] [Indexed: 12/11/2022]
Abstract
The breakthrough and rapid advance of clustered regularly interspaced short palindromic repeat (CRISPR)/CRISPR-associated protein 9 (Cas9) technology has enabled the efficient generation of gene-edited animals by one-step embryo manipulation. Clustered regularly interspaced short palindromic repeat/CRISPR-associated protein 9 delivery to the livestock embryos has been typically achieved by intracytoplasmic microinjection; however, recent studies show that electroporation may be a reliable, efficient, and practical method for CRISPR/Cas9 delivery. The source of embryos used to generate gene-edited animals varies from in vivo to in vitro produced, depending mostly on the species of interest. In addition, different Cas9 and gRNA reagents can be used for embryo editing, ranging from Cas9-coding plasmid or messenger RNA to Cas9 recombinant protein, which can be combined with in vitro transcribed or synthetic guide RNAs. Mosaicism is reported as one of the main problems with generation of animals by embryo editing. On the other hand, off-target mutations are rarely found in livestock derived from one-step editing. In this review, we discussed these and other aspects of generating gene-edited animals by single-step embryo manipulation.
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23
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Redesigning small ruminant genomes with CRISPR toolkit: Overview and perspectives. Theriogenology 2020; 147:25-33. [PMID: 32086048 DOI: 10.1016/j.theriogenology.2020.02.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 01/24/2020] [Accepted: 02/08/2020] [Indexed: 12/11/2022]
Abstract
Genetic modification is a rapidly developing field in which numerous significant breakthroughs have been achieved. Over the last few decades, genetic modification has evolved from insertional transgenesis to gene targeting and editing and, more recently, to base and prime editing using CRISPR-derived systems. Currently, CRISPR-based genome editing systems are showing great potential for generating gene-edited offspring with defined genetic characteristics. Domestic small ruminants (sheep and goats) have shown great potential as large animal models for genome engineering. Ovine and caprine genomes have been engineered using CRISPR-based systems for numerous purposes. These include generating superior agricultural breeds, expression of therapeutic agents in mammary glands, and developing animal models to be used in the study of human genetic disorders and regenerative medicine. The creation of these models has been facilitated by the continuous emergence and development of genetic modification tools. In this review, we provide an overview on how CRISPR-based systems have been used in the generation of gene-edited small ruminants through the two main pathways (embryonic microinjection and somatic cell nuclear transfer) and highlight the ovine and caprine genes that have been targeted via knockout, knockin, HDR-mediated point mutation, and base editing approaches, as well as the aims of these specific manipulations.
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24
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Bishop TF, Van Eenennaam AL. Genome editing approaches to augment livestock breeding programs. ACTA ACUST UNITED AC 2020; 223:223/Suppl_1/jeb207159. [PMID: 32034040 DOI: 10.1242/jeb.207159] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The prospect of genome editing offers a number of promising opportunities for livestock breeders. Firstly, these tools can be used in functional genomics to elucidate gene function, and identify causal variants underlying monogenic traits. Secondly, they can be used to precisely introduce useful genetic variation into structured livestock breeding programs. Such variation may include repair of genetic defects, the inactivation of undesired genes, and the moving of useful alleles and haplotypes between breeds in the absence of linkage drag. Editing could also be used to accelerate the rate of genetic progress by enabling the replacement of the germ cell lineage of commercial breeding animals with cells derived from genetically elite lines. In the future, editing may also provide a useful complement to evolving approaches to decrease the length of the generation interval through in vitro generation of gametes. For editing to be adopted, it will need to seamlessly integrate with livestock breeding schemes. This will likely involve introducing edits into multiple elite animals to avoid genetic bottlenecks. It will also require editing of different breeds and lines to maintain genetic diversity, and enable structured cross-breeding. This requirement is at odds with the process-based trigger and event-based regulatory approach that has been proposed for the products of genome editing by several countries. In the absence of regulatory harmony, researchers in some countries will have the ability to use genome editing in food animals, while others will not, resulting in disparate access to these tools, and ultimately the potential for global trade disruptions.
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25
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Sakurai T, Kamiyoshi A, Kawate H, Watanabe S, Sato M, Shindo T. Production of genetically engineered mice with higher efficiency, lower mosaicism, and multiplexing capability using maternally expressed Cas9. Sci Rep 2020; 10:1091. [PMID: 31974430 PMCID: PMC6978307 DOI: 10.1038/s41598-020-57996-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Accepted: 01/02/2020] [Indexed: 12/28/2022] Open
Abstract
The CRISPR/Cas9 system is widely used to generate gene-edited animals. Here, we developed an efficient system for generating genetically modified mice using maternal Cas9 from Cas9 transgenic mice. Using this system, we achieved lower mosaicism and higher rates of knock-in success, gene-editing, and birth compared to the similar parameters obtained using exogenously administered Cas9 (mRNA/protein) system. Furthermore, we successfully induced simultaneous mutations at multiple loci (a maximum of nine). Our novel gene-editing system based on maternal Cas9 could potentially facilitate the generation of mice with single and multiple gene modifications.
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Affiliation(s)
- Takayuki Sakurai
- Department of Life Innovation, Institute for Biomedical Sciences, Shinshu University, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan. .,Department of Cardiovascular Research, School of Medicine, Shinshu University, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan.
| | - Akiko Kamiyoshi
- Department of Life Innovation, Institute for Biomedical Sciences, Shinshu University, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan.,Department of Cardiovascular Research, School of Medicine, Shinshu University, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan
| | - Hisaka Kawate
- Department of Life Innovation, Institute for Biomedical Sciences, Shinshu University, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan.,Department of Cardiovascular Research, School of Medicine, Shinshu University, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan
| | - Satoshi Watanabe
- Animal Genome Research Unit, Division of Animal Science, National Institute of Agrobiological Sciences, Ibaraki, 305-8602, Japan
| | - Masahiro Sato
- Section of Gene Expression Regulation, Frontier Science Research Center, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan
| | - Takayuki Shindo
- Department of Life Innovation, Institute for Biomedical Sciences, Shinshu University, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan.,Department of Cardiovascular Research, School of Medicine, Shinshu University, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan
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Lee K, Uh K, Farrell K. Current progress of genome editing in livestock. Theriogenology 2020; 150:229-235. [PMID: 32000993 DOI: 10.1016/j.theriogenology.2020.01.036] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Accepted: 01/18/2020] [Indexed: 12/12/2022]
Abstract
Historically, genetic engineering in livestock proved to be challenging. Without stable embryonic stem cell lines to utilize, somatic cell nuclear transfer (SCNT) had to be employed to produce many of the genetically engineered (GE) livestock models. Through the genetic engineering of somatic cells followed by SCNT, GE livestock models could be generated carrying site-specific modifications. Although successful, only a few GE livestock models were generated because of low efficiency and associated birth defects. Recently, there have been major strides in the development of genome editing tools: Zinc-Finger Nucleases (ZFNs), Transcription activator-like effector nucleases (TALENS), and Clustered regularly interspaced short palindromic repeats (CRISPR) and CRISPR-associated 9 (Cas9) system. These tools rely on the generation of a double strand DNA break, followed by one of two repair pathways: non-homologous end joining (NHEJ) or homology directed repair (HDR). Compared to the traditional approaches, these tools dramatically reduce time and effort needed to establish a GE animal. Another benefit of utilizing genome editing tools is the application of direct injection into developing embryos to induce targeted mutations, therefore, eliminating side effects associated with SCNT. Emerging technological advancements of genome editing systems have dramatically improved efficiency to generate GE livestock models for both biomedical and agricultural purposes. Although the efficiency of genome editing tools has revolutionized GE livestock production, improvements for safe and consistent application are desired. This review will provide an overview of genome editing techniques, as well as examples of GE livestock models for agricultural and biomedical purposes.
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Affiliation(s)
- Kiho Lee
- Department of Animal and Poultry Sciences, Virginia Tech, Blacksburg, VA, USA.
| | - Kyungjun Uh
- Department of Animal and Poultry Sciences, Virginia Tech, Blacksburg, VA, USA
| | - Kayla Farrell
- Department of Animal and Poultry Sciences, Virginia Tech, Blacksburg, VA, USA
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Volpicella M, Leoni C, Dileo MCG, Ceci LR. Progress in the Analysis of Food Allergens through Molecular Biology Approaches. Cells 2019; 8:E1073. [PMID: 31547388 PMCID: PMC6770348 DOI: 10.3390/cells8091073] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 09/04/2019] [Accepted: 09/10/2019] [Indexed: 01/29/2023] Open
Abstract
Food allergies associated with class E immunoglobulins (IgE) are a serious health problem that affects between 1% and 10% of the population of developing countries, with a variability that depends on the geographical area and age range considered. These allergies are caused by a cross-link reaction between a specific food protein (the allergen) and the host IgE. Allergic reactions can range from mild itching to anaphylactic shock and there are no clues to predict the effects of an allergen. Strict avoidance of allergenic food is the only way to avoid possible serious allergic reactions. In the last 30 years a growing number of molecular studies have been conducted to obtain information on the diffusion of food allergens and to establish the structural basis of their allergenicity. At the same time, these studies have also allowed the development of molecular tools (mainly based on synthetic peptides and recombinant allergens) that can be of great help for diagnostic and therapeutic approaches of food allergies. Accordingly, this review focuses on advances in the study of food allergens made possible by molecular technologies and how results and technologies can be integrated for the development of a systematic food molecular allergology. The review may be of interest both to scientists approaching this field of investigation and to physicians who wish to have an update on the progress of research in diagnosis and therapy of food allergies.
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Affiliation(s)
- Mariateresa Volpicella
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari, Via Amendola 165/a, 70126 Bari, Italy.
- Institute of Bioenergetics, Biomembranes and Molecular Biotechnologies, Italian National Research Council, Via Amendola 165/a, 70126 Bari, Italy.
| | - Claudia Leoni
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari, Via Amendola 165/a, 70126 Bari, Italy.
| | - Maria C G Dileo
- Department of Biology, University of Bari, Via Amendola 165/a, 70126 Bari, Italy.
| | - Luigi R Ceci
- Institute of Bioenergetics, Biomembranes and Molecular Biotechnologies, Italian National Research Council, Via Amendola 165/a, 70126 Bari, Italy.
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Kalds P, Zhou S, Cai B, Liu J, Wang Y, Petersen B, Sonstegard T, Wang X, Chen Y. Sheep and Goat Genome Engineering: From Random Transgenesis to the CRISPR Era. Front Genet 2019; 10:750. [PMID: 31552084 PMCID: PMC6735269 DOI: 10.3389/fgene.2019.00750] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Accepted: 07/17/2019] [Indexed: 12/16/2022] Open
Abstract
Sheep and goats are valuable livestock species that have been raised for their production of meat, milk, fiber, and other by-products. Due to their suitable size, short gestation period, and abundant secretion of milk, sheep and goats have become important model animals in agricultural, pharmaceutical, and biomedical research. Genome engineering has been widely applied to sheep and goat research. Pronuclear injection and somatic cell nuclear transfer represent the two primary procedures for the generation of genetically modified sheep and goats. Further assisted tools have emerged to enhance the efficiency of genetic modification and to simplify the generation of genetically modified founders. These tools include sperm-mediated gene transfer, viral vectors, RNA interference, recombinases, transposons, and endonucleases. Of these tools, the four classes of site-specific endonucleases (meganucleases, ZFNs, TALENs, and CRISPRs) have attracted wide attention due to their DNA double-strand break-inducing role, which enable desired DNA modifications based on the stimulation of native cellular DNA repair mechanisms. Currently, CRISPR systems dominate the field of genome editing. Gene-edited sheep and goats, generated using these tools, provide valuable models for investigations on gene functions, improving animal breeding, producing pharmaceuticals in milk, improving animal disease resistance, recapitulating human diseases, and providing hosts for the growth of human organs. In addition, more promising derivative tools of CRISPR systems have emerged such as base editors which enable the induction of single-base alterations without any requirements for homology-directed repair or DNA donor. These precise editors are helpful for revealing desirable phenotypes and correcting genetic diseases controlled by single bases. This review highlights the advances of genome engineering in sheep and goats over the past four decades with particular emphasis on the application of CRISPR/Cas9 systems.
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Affiliation(s)
- Peter Kalds
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, China
- Department of Animal and Poultry Production, Faculty of Environmental Agricultural Sciences, Arish University, El-Arish, Egypt
| | - Shiwei Zhou
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Bei Cai
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Jiao Liu
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Ying Wang
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Bjoern Petersen
- Institute of Farm Animal Genetics, Friedrich-Loeffler-Institut, Neustadt, Germany
| | | | - Xiaolong Wang
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Yulin Chen
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, China
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29
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Li X, Hao F, Hu X, Wang H, Dai B, Wang X, Liang H, Cang M, Liu D. Generation of Tβ4 knock-in Cashmere goat using CRISPR/Cas9. Int J Biol Sci 2019; 15:1743-1754. [PMID: 31360116 PMCID: PMC6643211 DOI: 10.7150/ijbs.34820] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Accepted: 05/23/2019] [Indexed: 12/12/2022] Open
Abstract
The cashmere goat breed is known to provide excellent quality cashmere. Here, we attempted to breed high-yielding cashmere goats by specifically inserting the Tβ4 gene into the goat CCR5 locus and provided an animal model for future research. We successfully obtained Tβ4 knock-in goat without any screening and fluorescent markers using CRISPR/Cas9 technology. A series of experiments were performed to examine physical conditions and characteristics of the Tβ4 knock-in goat. The goat exhibited an increase in cashmere yield by 74.5% without affecting the fineness and quality. Additionally, RNA-seq analysis indicated that Tβ4 may promote hair growth by affecting processes such as vasoconstriction, angiogenesis, and vascular permeability around secondary hair follicles. Together, our study can significantly improve the breeding of cashmere goat and thereby increase economic efficiency.
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Affiliation(s)
- Xiaocong Li
- State Key Laboratory of Reproductive Regulation & Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, 010000, China
| | - Fei Hao
- State Key Laboratory of Reproductive Regulation & Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, 010000, China
| | - Xiao Hu
- State Key Laboratory of Reproductive Regulation & Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, 010000, China
| | - Hui Wang
- State Key Laboratory of Reproductive Regulation & Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, 010000, China
| | - Bai Dai
- State Key Laboratory of Reproductive Regulation & Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, 010000, China
| | - Xiao Wang
- State Key Laboratory of Reproductive Regulation & Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, 010000, China
| | - Hao Liang
- State Key Laboratory of Reproductive Regulation & Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, 010000, China
| | - Ming Cang
- State Key Laboratory of Reproductive Regulation & Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, 010000, China
| | - Dongjun Liu
- State Key Laboratory of Reproductive Regulation & Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, 010000, China
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Jiang S, Shen QW. Principles of gene editing techniques and applications in animal husbandry. 3 Biotech 2019; 9:28. [PMID: 30622866 DOI: 10.1007/s13205-018-1563-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Accepted: 12/29/2018] [Indexed: 11/30/2022] Open
Abstract
Gene editing techniques were developed chronologically, which include zinc finger nuclease, transcription activator-like effector nuclease and clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR-associated protein 9 (Cas 9). In this review, the working principles of these techniques were first introduced, their advantages and disadvantages were then discussed, their application in animal husbandry were elaborated, and finally human concerns about gene editing were presented. Compared to the two former techniques, the third-generation gene editing technique CRISPR/Cas9 has higher targeting efficiency and accuracy, less off-target effect, lower cytotoxicity and lower costs for being easier for vector design and manipulation. Although some people may concern about social or ethical issues, the benefits of gene editing certainly overweigh its demerits. The three gene editing techniques have been successfully used to improve the production and quality of livestock products, animal fertility, resistance to diseases, and welfare in animal husbandry. With legislation and the development of gene editing technology per se, it anticipatable that gene editing will have a broader utilization and make our lives happier.
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Affiliation(s)
- Shengwang Jiang
- 1College of Animal Science and Technology, Hunan Agricultural University, Changsha, 410128 Hunan China
| | - Qingwu W Shen
- 2College of Food Science and Technology, Hunan Agricultural University, Changsha, 410128 Hunan China
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Su X, Wang S, Su G, Zheng Z, Zhang J, Ma Y, Liu Z, Zhou H, Zhang Y, Zhang L. Production of microhomologous-mediated site-specific integrated LacS gene cow using TALENs. Theriogenology 2018; 119:282-288. [PMID: 30075414 DOI: 10.1016/j.theriogenology.2018.07.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2018] [Revised: 07/13/2018] [Accepted: 07/14/2018] [Indexed: 12/31/2022]
Abstract
Gene editing tools (Zinc-Finger Nucleases, ZFN; Transcription Activator-Like Effector Nucleases, TALEN; and Clustered Regularly Interspaced Short Palindromic Repeats (CRISPR)/CRISPR-associated (Cas)9, CRISPR-Cas9) provide us with a powerful means of performing genetic engineering procedures. A combinational approach that utilizes both somatic cell nuclear transfer (SCNT) and somatic cell gene editing facilitates the generation of genetically engineered animals. However, the associated research has utilized markers and/or selected genes, which constitute a potential threat to biosafety. Microhomologous-mediated end-joining (MMEJ) has showed the utilization of micro-homologous arms (5-25 bp) can mediate exogenous gene insertion. Dairy milk is a major source of nutrition worldwide. However, most people are not capable of optimally utilizing the nutrition in milk because of lactose intolerance. Sulfolobus solfataricus β-glycosidase (LacS) is a lactase derived from the extreme thermophilic archaeon Sulfolobus solfataricus. Our finally aim was to site-specific integrated LacS gene into cow's genome through TALEN-mediated MMEJ and produce low-lactose cow. Firstly, we constructed TALENs vectors which target to the cow's β-casein locus and LacS gene expression vector which contain TALEN reorganization sequence and micro-homologous arms. Then we co-transfected these vectors into fetal derived skin fibroblasts and cultured as monoclone. Positive cell clones were screened using 3' junction PCR amplification and sequencing analysis. The positive cells were used as donors for SCNT and embryo transfer (ET). Lastly, we detected the genotype through PCR of blood genomic DNA. This resulted in a LacS knock-in rate of 0.8% in TALEN-treated cattle fetal fibroblasts. The blastocyst rate of SCNT embryo was 27%. The 3 months pregnancy rate was 20%. Finally, we obtained 1 newborn cow (5%) and verified its genotype. We obtained 1 site-specific marker-free LacS transgenic cow. It provides a basis to solve lactose intolerance by gene engineering breeding. This study also provides us with a new strategy to facilitate gene knock-ins in livestock using techniques that exhibit improved biosafety and intuitive methodologies.
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Affiliation(s)
- Xiaohu Su
- Key Laboratory of Gene Engineering of the Ministry of Education, Guangzhou Key Laboratory of Healthy Aging Research and State Key Laboratory of Biocontrol, SYSU-BCM JointResearch Center, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, PR China
| | - Shenyuan Wang
- Key Laboratory of Biological Manufacturing of Inner Mongolia Autonomous Region, College of Life Sciences, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia Autonomous Region, 010018, PR China
| | - Guanghua Su
- The State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, Inner Mongolia Autonomous Region, 010018, PR China
| | - Zhong Zheng
- The State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, Inner Mongolia Autonomous Region, 010018, PR China
| | - Jiaqi Zhang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Yunlong Ma
- Key Laboratory of Biological Manufacturing of Inner Mongolia Autonomous Region, College of Life Sciences, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia Autonomous Region, 010018, PR China
| | - Zongzheng Liu
- Qingdao Animal Husbandry and Veterinary Research Institution, Qingdao, ShanDong, 266100, PR China
| | - Huanmin Zhou
- Key Laboratory of Biological Manufacturing of Inner Mongolia Autonomous Region, College of Life Sciences, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia Autonomous Region, 010018, PR China
| | - Yanru Zhang
- Key Laboratory of Biological Manufacturing of Inner Mongolia Autonomous Region, College of Life Sciences, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia Autonomous Region, 010018, PR China.
| | - Li Zhang
- The State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, Inner Mongolia Autonomous Region, 010018, PR China.
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32
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Wei J, Wagner S, Maclean P, Brophy B, Cole S, Smolenski G, Carlson DF, Fahrenkrug SC, Wells DN, Laible G. Cattle with a precise, zygote-mediated deletion safely eliminate the major milk allergen beta-lactoglobulin. Sci Rep 2018; 8:7661. [PMID: 29769555 PMCID: PMC5955954 DOI: 10.1038/s41598-018-25654-8] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 04/19/2018] [Indexed: 12/26/2022] Open
Abstract
We applied precise zygote-mediated genome editing to eliminate beta-lactoglobulin (BLG), a major allergen in cows’ milk. To efficiently generate LGB knockout cows, biopsied embryos were screened to transfer only appropriately modified embryos. Transfer of 13 pre-selected embryos into surrogate cows resulted in the birth of three calves, one dying shortly after birth. Deep sequencing results confirmed conversion of the genotype from wild type to the edited nine bp deletion by more than 97% in the two male calves. The third calf, a healthy female, had in addition to the expected nine bp deletion (81%), alleles with an in frame 21 bp deletion (<17%) at the target site. While her milk was free of any mature BLG, we detected low levels of a BLG variant derived from the minor deletion allele. This confirmed that the nine bp deletion genotype completely knocks out production of BLG. In addition, we showed that the LGB knockout animals are free of any TALEN-mediated off-target mutations or vector integration events using an unbiased whole genome analysis. Our study demonstrates the feasibility of generating precisely biallelically edited cattle by zygote-mediated editing for the safe production of hypoallergenic milk.
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Affiliation(s)
- Jingwei Wei
- AgResearch, Ruakura Research Centre, Hamilton, 3240, New Zealand
| | - Stefan Wagner
- AgResearch, Ruakura Research Centre, Hamilton, 3240, New Zealand.,Rowett Institute, Aberdeen, AB25 2ZD, United Kingdom
| | - Paul Maclean
- AgResearch, Ruakura Research Centre, Hamilton, 3240, New Zealand
| | - Brigid Brophy
- AgResearch, Ruakura Research Centre, Hamilton, 3240, New Zealand
| | - Sally Cole
- AgResearch, Ruakura Research Centre, Hamilton, 3240, New Zealand
| | - Grant Smolenski
- AgResearch, Ruakura Research Centre, Hamilton, 3240, New Zealand.,MS3 Solutions Ltd., Ruakura Research Centre, Hamilton, 3240, New Zealand
| | | | | | - David N Wells
- AgResearch, Ruakura Research Centre, Hamilton, 3240, New Zealand
| | - Götz Laible
- AgResearch, Ruakura Research Centre, Hamilton, 3240, New Zealand.
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Abstract
Prokaryotic type II adaptive immune systems have been developed into the versatile CRISPR technology, which has been widely applied in site-specific genome editing and has revolutionized biomedical research due to its superior efficiency and flexibility. Recent studies have greatly diversified CRISPR technologies by coupling it with various DNA repair mechanisms and targeting strategies. These new advances have significantly expanded the generation of genetically modified animal models, either by including species in which targeted genetic modification could not be achieved previously, or through introducing complex genetic modifications that take multiple steps and cost years to achieve using traditional methods. Herein, we review the recent developments and applications of CRISPR-based technology in generating various animal models, and discuss the everlasting impact of this new progress on biomedical research.
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Affiliation(s)
- Xun Ma
- Key Laboratory for Regenerative Medicine in Ministry of Education, School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China.
| | - Avery Sum-Yu Wong
- Key Laboratory for Regenerative Medicine in Ministry of Education, School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China.
| | - Hei-Yin Tam
- Key Laboratory for Regenerative Medicine in Ministry of Education, School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China.
| | - Samuel Yung-Kin Tsui
- Key Laboratory for Regenerative Medicine in Ministry of Education, School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China.
| | - Dittman Lai-Shun Chung
- Key Laboratory for Regenerative Medicine in Ministry of Education, School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China.
| | - Bo Feng
- Key Laboratory for Regenerative Medicine in Ministry of Education, School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China. .,Guangzhou Institute of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou Guangdong 510530, China.,SBS Core Laboratory, CUHK Shenzhen Research Institute, Shenzhen Guangdong 518057, China
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