1
|
Ide M, Saito I, Sanbo M, Kanatsu-Shinohara M, Shinohara T, Hirabayashi M, Hochi S. Lower developmental potential of rat zygotes produced by ooplasmic injection of testicular spermatozoa versus cauda epididymal spermatozoa. J Reprod Dev 2024; 70:254-258. [PMID: 38735740 PMCID: PMC11310386 DOI: 10.1262/jrd.2024-030] [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: 04/01/2024] [Accepted: 04/18/2024] [Indexed: 05/14/2024] Open
Abstract
Intracytoplasmic sperm injection (ICSI) is clinically used to treat obstructive/nonobstructive azoospermia. This study compared the efficacy of ICSI with cauda epididymal and testicular sperm in Wistar (WI) and Brown-Norway (BN) rats. The transfer of ICSI oocytes with cryopreserved epididymal and testicular WI sperm resulted in offspring production of 26.2% and 3.7%-4.7%, respectively (P < 0.05). Treatments for artificial oocyte activation (AOA) and acrosome removal improved pronuclear formation in BN-ICSI oocytes; however, only AOA treatment was effective in producing offspring (3.7%-6.5%). In the case of ICSI with testicular sperm (TESE-ICSI), one offspring (0.6%) was derived from the BN-TESE-ICSI oocytes. The application of AOA or a hypo-osmotic sperm suspension did not improve the production of TESE-ICSI offspring. Thus, outbred WI rat offspring can be produced by using ICSI and less efficiently by using TESE-ICSI. Challenges in producing offspring by using ICSI/TESE-ICSI in inbred BN strain require further investigation.
Collapse
Affiliation(s)
- Misuzu Ide
- Graduate School of Science and Technology, Shinshu University, Nagano 386-8567, Japan
- National Institute for Physiological Sciences, Aichi 444-8787, Japan
| | - Ibuki Saito
- Graduate School of Science and Technology, Shinshu University, Nagano 386-8567, Japan
| | - Makoto Sanbo
- National Institute for Physiological Sciences, Aichi 444-8787, Japan
| | | | - Takashi Shinohara
- Graduate School of Medicine, Kyoto University, Kyoto 606-8501, Japan
| | - Masumi Hirabayashi
- National Institute for Physiological Sciences, Aichi 444-8787, Japan
- Graduate Institute for Advanced Studies, SOKENDAI, Aichi 444-8787, Japan
| | - Shinichi Hochi
- Graduate School of Science and Technology, Shinshu University, Nagano 386-8567, Japan
- Faculty of Textile Science and Technology, Shinshu University, Nagano 386-8567, Japan
| |
Collapse
|
2
|
Moradbeigi P, Hosseini S, Salehi M, Mogheiseh A. Methyl β-Cyclodextrin-sperm-mediated gene editing (MBCD-SMGE): a simple and efficient method for targeted mutant mouse production. Biol Proced Online 2024; 26:3. [PMID: 38279106 PMCID: PMC10811837 DOI: 10.1186/s12575-024-00230-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Accepted: 01/16/2024] [Indexed: 01/28/2024] Open
Abstract
BACKGROUND Generating targeted mutant mice is a crucial technology in biomedical research. This study focuses on optimizing the CRISPR/Cas9 system uptake into sperm cells using the methyl β-cyclodextrin-sperm-mediated gene transfer (MBCD-SMGT) technique to generate targeted mutant blastocysts and mice efficiently. Additionally, the present study elucidates the roles of cholesterol and reactive oxygen species (ROS) in the exogenous DNA uptake by sperm. RESULTS In this study, B6D2F1 mouse sperm were incubated in the c-TYH medium with different concentrations of MBCD (0, 0.75, 1, and 2 mM) in the presence of 20 ng/µl pCAG-eCas9-GFP-U6-gRNA (pgRNA-Cas9) for 30 min. Functional parameters, extracellular ROS, and the copy numbers of internalized plasmid per sperm cell were evaluated. Subsequently, in vitro fertilization (IVF) was performed and fertilization rate, early embryonic development, and transfection rate were assessed. Finally, our study investigated the potential of the MBCD-SMGT technique in combination with the CRISPR-Cas9 system, referred to as MBCD-SMGE (MBCD-sperm-mediated gene editing), for generating targeted mutant blastocysts and mice. Results indicated that cholesterol removal from the sperm membrane using MBCD resulted in a premature acrosomal reaction, an increase in extracellular ROS levels, and a dose-dependent influence on the copy numbers of the internalized plasmids per sperm cell. Moreover, the MBCD-SMGT technique led to a larger population of transfected motile sperm and a higher production rate of GFP-positive blastocysts. Additionally, the current study validated the targeted indel in blastocyst and mouse derived from MBCD-SMGE technique. CONCLUSION Overall, this study highlights the significant potential of the MBCD-SMGE technique for generating targeted mutant mice. It holds enormous promise for modeling human diseases and improving desirable traits in animals.
Collapse
Affiliation(s)
- Parisa Moradbeigi
- Department of Clinical Sciences, School of Veterinary Medicine, Shiraz University, P. O. Box: 7144169155, Shiraz, Iran
| | - Sara Hosseini
- Cellular and Molecular Biology Research Center, Shahid Beheshti University of Medical Sciences, P.O. Box: 193954717, Tehran, Iran
- Hasti Noavaran Gene Royan Co, Tehran, Iran
| | - Mohammad Salehi
- Cellular and Molecular Biology Research Center, Shahid Beheshti University of Medical Sciences, P.O. Box: 193954717, Tehran, Iran.
- Department of Biotechnology, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Asghar Mogheiseh
- Department of Clinical Sciences, School of Veterinary Medicine, Shiraz University, P. O. Box: 7144169155, Shiraz, Iran
| |
Collapse
|
3
|
Egg Development After In Vitro Insemination in Japanese Quail ( Coturnix japonica). J Poult Sci 2023; 60:2023001. [PMID: 36756046 PMCID: PMC9884635 DOI: 10.2141/jpsa.2023001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Accepted: 06/29/2022] [Indexed: 01/25/2023] Open
Abstract
In vitro fertilization has been widely used to produce offspring in several mammalian species. We previously successfully produced Japanese quail chicks using intracytoplasmic sperm injection (ICSI), whereas in vitro insemination was not successful. This may be due to the difficulties associated with mimicking the sperm-egg fusion process and subsequent events in physiological polyspermic fertilization in vitro. In the present study, we observed egg development after in vitro insemination and investigated the inactivation of metaphase-promoting factor (MPF) and cytostatic factor (CSF), which are downstream of the Ca2+ signaling pathway in the egg, due to fertilizing sperm. We found a sperm number-dependent increase in hole formation caused by sperm penetration of the perivitelline membrane, the extracellular coat surrounding the egg. Egg development was observed following in vitro insemination; however, the developmental rate and stages after 24-h culture were inferior to those of ICSI eggs, even when insemination was performed with a high number of sperm (2 × 104). We also noted the downregulation of inositol 1,4,5-trisphosphate receptor-1, ryanodine receptor-3, cyclin B1, and c-MOS, which are important regulatory components of MPF and CSF in the egg, which was dependent on the number of sperm used for insemination. However, the decreases observed in these components did not reach the levels observed in the ICSI eggs. Collectively, the present results suggest that a sperm number higher than 2 × 104 is required for the progression of the Ca2+ signaling pathway, which initiates subsequent egg development in Japanese quail.
Collapse
|
4
|
Montoliu L. Transgenesis and Genome Engineering: A Historical Review. Methods Mol Biol 2023; 2631:1-32. [PMID: 36995662 DOI: 10.1007/978-1-0716-2990-1_1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
Abstract
Our ability to modify DNA molecules and to introduce them into mammalian cells or embryos almost appears in parallel, starting from the 1970s of the last century. Genetic engineering techniques rapidly developed between 1970 and 1980. In contrast, robust procedures to microinject or introduce DNA constructs into individuals did not take off until 1980 and evolved during the following two decades. For some years, it was only possible to add transgenes, de novo, of different formats, including artificial chromosomes, in a variety of vertebrate species or to introduce specific mutations essentially in mice, thanks to the gene-targeting methods by homologous recombination approaches using mouse embryonic stem (ES) cells. Eventually, genome-editing tools brought the possibility to add or inactivate DNA sequences, at specific sites, at will, irrespective of the animal species involved. Together with a variety of additional techniques, this chapter will summarize the milestones in the transgenesis and genome engineering fields from the 1970s to date.
Collapse
Affiliation(s)
- Lluis Montoliu
- National Centre for Biotechnology (CNB-CSIC) and Center for Biomedical Network Research on Rare Diseases (CIBERER-ISCIII), Madrid, Spain.
- National Centre for Biotechnology (CNB-CSIC), Madrid, Spain.
| |
Collapse
|
5
|
Wei J, Zhang W, Li J, Jin Y, Qiu Z. Application of the transgenic pig model in biomedical research: A review. Front Cell Dev Biol 2022; 10:1031812. [PMID: 36325365 PMCID: PMC9618879 DOI: 10.3389/fcell.2022.1031812] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 09/26/2022] [Indexed: 11/18/2022] Open
Abstract
The large animal model has gradually become an essential part of preclinical research studies, relating to exploring the disease pathological mechanism, genic function, pharmacy, and other subjects. Although the mouse model has already been widely accepted in clinical experiments, the need for finding an animal model with high similarity compared with a human model is urgent due to the different body functions and systems between mice and humans. The pig is an optimal choice for replacement. Therefore, enhancing the production of pigs used for models is an important part of the large animal model as well. Transgenic pigs show superiority in pig model creation because of the progress in genetic engineering. Successful cases of transgenic pig models occur in the clinical field of metabolic diseases, neurodegenerative diseases, and genetic diseases. In addition, the choice of pig breed influences the effort and efficiency of reproduction, and the mini pig has relative obvious advantages in pig model production. Indeed, pig models in these diseases provide great value in studies of their causes and treatments, especially at the genetic level. This review briefly outlines the method used to create transgenic pigs and species of producing transgenic pigs and provides an overview of their applications on different diseases and limitations for present pig model developments.
Collapse
Affiliation(s)
| | | | | | - Ye Jin
- *Correspondence: Ye Jin, ; Zhidong Qiu,
| | | |
Collapse
|
6
|
Bovine ICSI: limiting factors, strategies to improve its efficiency and alternative approaches. ZYGOTE 2022; 30:749-767. [PMID: 36082429 DOI: 10.1017/s0967199422000296] [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: 11/07/2022]
Abstract
Intracytoplasmic sperm injection (ICSI) is an assisted reproductive technique mainly used to overcome severe infertility problems associated with the male factor, but in cattle its efficiency is far from optimal. Artificial activation treatments combining ionomycin (Io) with 6-dimethylaminopurine after piezo-ICSI or anisomycin after conventional ICSI have recently increased the blastocyst rate obtained. Compounds to capacitate bovine spermatozoa, such as heparin and methyl-β-cyclodextrin and compounds to destabilize sperm membranes such as NaOH, lysolecithin and Triton X-100, have been assessed, although they have failed to substantially improve post-ICSI embryonic development. Disulfide bond reducing agents, such as dithiothreitol (DTT), dithiobutylamine and reduced glutathione, have been assessed to decondense the hypercondensed head of bovine spermatozoa, the two latter being more efficient than DTT and less harmful. Although piezo-directed ICSI without external activation has generated high fertilization rates and modest rates of early embryo development, other studies have required exogenous activation to improve the results. This manuscript thoroughly reviews the different strategies used in bovine ICSI to improve its efficiency and proposes some alternative approaches, such as the use of extracellular vesicles (EVs) as 'biological methods of oocyte activation' or the incorporation of EVs in the in vitro maturation and/or culture medium as antioxidant defence agents to improve the competence of the ooplasm, as well as a preincubation of the spermatozoa in estrous oviductal fluid to induce physiological capacitation and acrosome reaction before ICSI, and the use of hyaluronate in the sperm immobilization medium.
Collapse
|
7
|
Whitworth KM, Green JA, Redel BK, Geisert RD, Lee K, Telugu BP, Wells KD, Prather RS. Improvements in pig agriculture through gene editing. CABI AGRICULTURE AND BIOSCIENCE 2022; 3:41. [PMID: 35755158 PMCID: PMC9209828 DOI: 10.1186/s43170-022-00111-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Accepted: 06/12/2022] [Indexed: 05/06/2023]
Abstract
Genetic modification of animals via selective breeding is the basis for modern agriculture. The current breeding paradigm however has limitations, chief among them is the requirement for the beneficial trait to exist within the population. Desirable alleles in geographically isolated breeds, or breeds selected for a different conformation and commercial application, and more importantly animals from different genera or species cannot be introgressed into the population via selective breeding. Additionally, linkage disequilibrium results in low heritability and necessitates breeding over successive generations to fix a beneficial trait within a population. Given the need to sustainably improve animal production to feed an anticipated 9 billion global population by 2030 against a backdrop of infectious diseases and a looming threat from climate change, there is a pressing need for responsive, precise, and agile breeding strategies. The availability of genome editing tools that allow for the introduction of precise genetic modification at a single nucleotide resolution, while also facilitating large transgene integration in the target population, offers a solution. Concordant with the developments in genomic sequencing approaches, progress among germline editing efforts is expected to reach feverish pace. The current manuscript reviews past and current developments in germline engineering in pigs, and the many advantages they confer for advancing animal agriculture.
Collapse
Affiliation(s)
- Kristin M. Whitworth
- Division of Animal Science, College of Agriculture Food and Natural Resources, University of Missouri, 920 East Campus Drive, Columbia, MO 65211 USA
| | - Jonathan A. Green
- Division of Animal Science, College of Agriculture Food and Natural Resources, University of Missouri, 920 East Campus Drive, Columbia, MO 65211 USA
| | - Bethany K. Redel
- United States Department of Agriculture – Agriculture Research Service, Plant Genetics Research Unit, Columbia, MO 65211 USA
| | - Rodney D. Geisert
- Division of Animal Science, College of Agriculture Food and Natural Resources, University of Missouri, 920 East Campus Drive, Columbia, MO 65211 USA
| | - Kiho Lee
- Division of Animal Science, College of Agriculture Food and Natural Resources, University of Missouri, 920 East Campus Drive, Columbia, MO 65211 USA
| | - Bhanu P. Telugu
- Division of Animal Science, College of Agriculture Food and Natural Resources, University of Missouri, 920 East Campus Drive, Columbia, MO 65211 USA
| | - Kevin D. Wells
- Division of Animal Science, College of Agriculture Food and Natural Resources, University of Missouri, 920 East Campus Drive, Columbia, MO 65211 USA
| | - Randall S. Prather
- Division of Animal Science, College of Agriculture Food and Natural Resources, University of Missouri, 920 East Campus Drive, Columbia, MO 65211 USA
| |
Collapse
|
8
|
Barlow VL, Tsai YH. Acetylation at Lysine 86 of Escherichia coli HUβ Modulates the DNA-Binding Capability of the Protein. Front Microbiol 2022; 12:809030. [PMID: 35185833 PMCID: PMC8854993 DOI: 10.3389/fmicb.2021.809030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Accepted: 12/24/2021] [Indexed: 11/13/2022] Open
Abstract
DNA-binding protein HU is highly conserved in bacteria and has been implicated in a range of cellular processes and phenotypes. Like eukaryotic histones, HU is subjected to post-translational modifications. Specifically, acetylation of several lysine residues have been reported in both homologs of Escherichia coli HU. Here, we investigated the effect of acetylation at Lys67 and Lys86, located in the DNA binding-loop and interface of E. coli HUβ, respectively. Using the technique of genetic code expansion, homogeneous HUβ(K67ac) and HUβ(K86ac) protein units were obtained. Acetylation at Lys86 seemed to have negligible effects on protein secondary structure and thermal stability. Nevertheless, we found that this site-specific acetylation can regulate DNA binding by the HU homodimer but not the heterodimer. Intriguingly, while Lys86 acetylation reduced the interaction of the HU homodimer with short double-stranded DNA containing a 2-nucleotide gap or nick, it enhanced the interaction with longer DNA fragments and had minimal effect on a short, fully complementary DNA fragment. These results demonstrate the complexity of post-translational modifications in functional regulation, as well as indicating the role of lysine acetylation in tuning bacterial gene transcription and epigenetic regulation.
Collapse
Affiliation(s)
| | - Yu-Hsuan Tsai
- School of Chemistry, Cardiff University, Cardiff, United Kingdom
- Institute of Molecular Physiology, Shenzhen Bay Laboratory, Shenzhen, China
- *Correspondence: Yu-Hsuan Tsai,
| |
Collapse
|
9
|
Montoliu L. Historical DNA Manipulation Overview. Methods Mol Biol 2022; 2495:3-28. [PMID: 35696025 DOI: 10.1007/978-1-0716-2301-5_1] [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] [Indexed: 06/15/2023]
Abstract
The history of DNA manipulation for the creation of genetically modified animals began in the 1970s, using viruses as the first DNA molecules microinjected into mouse embryos at different preimplantation stages. Subsequently, simple DNA plasmids were used to microinject into the pronuclei of fertilized mouse oocytes and that method became the reference for many years. The isolation of embryonic stem cells together with advances in genetics allowed the generation of gene-specific knockout mice, later on improved with conditional mutations. Cloning procedures expanded the gene inactivation to livestock and other non-model mammalian species. Lentiviruses, artificial chromosomes, and intracytoplasmic sperm injections expanded the toolbox for DNA manipulation. The last chapter of this short but intense history belongs to programmable nucleases, particularly CRISPR-Cas systems, triggering the development of genomic-editing techniques, the current revolution we are living in.
Collapse
Affiliation(s)
- Lluis Montoliu
- National Centre for Biotechnology (CNB-CSIC) and Center for Biomedical Network Research on Rare Diseases (CIBERER-ISCIII), Madrid, Spain.
| |
Collapse
|
10
|
Park JE, Sasaki E. Assisted Reproductive Techniques and Genetic Manipulation in the Common Marmoset. ILAR J 2021; 61:286-303. [PMID: 33693670 PMCID: PMC8918153 DOI: 10.1093/ilar/ilab002] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 10/27/2020] [Accepted: 11/05/2020] [Indexed: 12/12/2022] Open
Abstract
Abstract
Genetic modification of nonhuman primate (NHP) zygotes is a useful method for the development of NHP models of human diseases. This review summarizes the recent advances in the development of assisted reproductive and genetic manipulation techniques in NHP, providing the basis for the generation of genetically modified NHP disease models. In this study, we review assisted reproductive techniques, including ovarian stimulation, in vitro maturation of oocytes, in vitro fertilization, embryo culture, embryo transfer, and intracytoplasmic sperm injection protocols in marmosets. Furthermore, we review genetic manipulation techniques, including transgenic strategies, target gene knock-out and knock-in using gene editing protocols, and newly developed gene-editing approaches that may potentially impact the production of genetically manipulated NHP models. We further discuss the progress of assisted reproductive and genetic manipulation techniques in NHP; future prospects on genetically modified NHP models for biomedical research are also highlighted.
Collapse
Affiliation(s)
- Jung Eun Park
- Department of Neurobiology, University of Pittsburgh, School of Medicine in Pittsburgh, Pennsylvania, USA
| | - Erika Sasaki
- Department of Marmoset Biology and Medicine, Central Institute for Experimental Animals in Kawasaki, Kanagawa, Japan
| |
Collapse
|
11
|
Ratner LD, La Motta GE, Briski O, Salamone DF, Fernandez-Martin R. Practical Approaches for Knock-Out Gene Editing in Pigs. Front Genet 2021; 11:617850. [PMID: 33747029 PMCID: PMC7973260 DOI: 10.3389/fgene.2020.617850] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Accepted: 12/30/2020] [Indexed: 12/18/2022] Open
Abstract
Pigs are an important resource for meat production and serve as a model for human diseases. Due to their physiological and anatomical similarities to humans, these animals can recapitulate symptoms of human diseases, becoming an effective model for biomedical research. Although, in the past pig have not been widely used partially because of the difficulty in genetic modification; nowadays, with the new revolutionary technology of programmable nucleases, and fundamentally of the CRISPR-Cas9 systems, it is possible for the first time to precisely modify the porcine genome as never before. To this purpose, it is necessary to introduce the system into early stage zygotes or to edit cells followed by somatic cell nuclear transfer. In this review, several strategies for pig knock-out gene editing, using the CRISPR-Cas9 system, will be summarized, as well as genotyping methods and different delivery techniques to introduce these tools into the embryos. Finally, the best approaches to produce homogeneous, biallelic edited animals will be discussed.
Collapse
Affiliation(s)
- Laura Daniela Ratner
- Laboratorio Biotecnología Animal (LabBA), Departamento de Producción Animal, Facultad de Agronomía, Universidad de Buenos Aires, Buenos Aires, Argentina.,Instituto de Investigaciones en Producción Animal (INPA), CONICET-Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Gaston Emilio La Motta
- Laboratorio Biotecnología Animal (LabBA), Departamento de Producción Animal, Facultad de Agronomía, Universidad de Buenos Aires, Buenos Aires, Argentina.,Instituto de Investigaciones en Producción Animal (INPA), CONICET-Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Olinda Briski
- Laboratorio Biotecnología Animal (LabBA), Departamento de Producción Animal, Facultad de Agronomía, Universidad de Buenos Aires, Buenos Aires, Argentina.,Instituto de Investigaciones en Producción Animal (INPA), CONICET-Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Daniel Felipe Salamone
- Laboratorio Biotecnología Animal (LabBA), Departamento de Producción Animal, Facultad de Agronomía, Universidad de Buenos Aires, Buenos Aires, Argentina.,Instituto de Investigaciones en Producción Animal (INPA), CONICET-Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Rafael Fernandez-Martin
- Laboratorio Biotecnología Animal (LabBA), Departamento de Producción Animal, Facultad de Agronomía, Universidad de Buenos Aires, Buenos Aires, Argentina.,Instituto de Investigaciones en Producción Animal (INPA), CONICET-Universidad de Buenos Aires, Buenos Aires, Argentina
| |
Collapse
|
12
|
Ebrahimi M, Mara L, Chessa B, Chessa F, Parham A, Dattena M. Optimizing injection time of GFP plasmid into sheep zygote. Reprod Domest Anim 2021; 56:467-475. [PMID: 33368650 DOI: 10.1111/rda.13885] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Revised: 12/14/2020] [Accepted: 12/22/2020] [Indexed: 11/28/2022]
Abstract
Microinjection of exogenous DNA into the cytoplasm of matured oocytes or zygotes is a promising technique to generate transgenic animals. However, the data about the microinjection time and procedure in sheep are limited and have not treated in detail. To obtain more in-depth information, the Sarda sheep oocytes from abattoir-derived ovaries were subjected to IVM and IVF. Then, the GFP plasmid as a reporter gene was injected into the cytoplasm of MII oocytes (n: 95) and zygotes at different post-insemination intervals (6-8 hpi, n: 120; 8-10 hpi, n: 122; 10-12 hpi, n: 110 and 12-14 hpi, n: 96). There were no significant differences in the cleavage rates between the groups. However, blastocyst rate of injected zygotes at all-time intervals was significantly lower than injected MII oocytes and control group (p < 0.05). Interestingly, the proportion of GFP-positive embryos was higher at 8-10 hpi compared with other injected groups (4 % versus 0 %, p < 0.01). Among these, the proportion of mosaic embryos was high and two of those embryos developed to the blastocyst stage. In conclusion, we settled on the cytoplasmic microinjection of GFP plasmid at 8-10 hpi as an optimized time point for the production of transgenic sheep and subsequent experiments.
Collapse
Affiliation(s)
- Mohammadreza Ebrahimi
- Department of Basic Sciences, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Laura Mara
- Department of Animal Science, Agricultural Research Agency of Sardinia, Sassari, Italy
| | - Bernardo Chessa
- Department of Veterinary Medicine, University of Sassari, Sassari, Italy
| | - Fabrizio Chessa
- Department of Animal Science, Agricultural Research Agency of Sardinia, Sassari, Italy
| | - Abbas Parham
- Department of Basic Sciences, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran.,Stem Cell Biology and Regenerative Medicine Research Group, Institute of Biotechnology, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Maria Dattena
- Department of Animal Science, Agricultural Research Agency of Sardinia, Sassari, Italy
| |
Collapse
|
13
|
Wang L, Li J. 'Artificial spermatid'-mediated genome editing†. Biol Reprod 2020; 101:538-548. [PMID: 31077288 DOI: 10.1093/biolre/ioz087] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 04/27/2019] [Accepted: 05/10/2019] [Indexed: 12/12/2022] Open
Abstract
For years, extensive efforts have been made to use mammalian sperm as the mediator to generate genetically modified animals; however, the strategy of sperm-mediated gene transfer (SMGT) is unable to produce stable and diversified modifications in descendants. Recently, haploid embryonic stem cells (haESCs) have been successfully derived from haploid embryos carrying the genome of highly specialized gametes, and can stably maintain haploidy (through periodic cell sorting based on DNA quantity) and both self-renewal and pluripotency in long-term cell culture. In particular, haESCs derived from androgenetic haploid blastocysts (AG-haESCs), carrying only the sperm genome, can support the generation of live mice (semi-cloned, SC mice) through oocyte injection. Remarkably, after removal of the imprinted control regions H19-DMR (differentially methylated region of DNA) and IG-DMR in AG-haESCs, the double knockout (DKO)-AG-haESCs can stably produce SC animals with high efficiency, and so can serve as a sperm equivalent. Importantly, DKO-AG-haESCs can be used for multiple rounds of gene modifications in vitro, followed by efficient generation of live and fertile mice with the expected genetic traits. Thus, DKO-AG-haESCs (referred to as 'artificial spermatids') combed with CRISPR-Cas technology can be used as the genetically tractable fertilization agent, to efficiently create genetically modified offspring, and is a versatile genetic tool for in vivo analyses of gene function.
Collapse
Affiliation(s)
- Lingbo Wang
- State Key Laboratory of Cell Biology, Shanghai Key Laboratory of Molecular Andrology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China.,Obstetrics and Gynecology Hospital, NHC Key Laboratory of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), School of Life Sciences, Fudan University, Shanghai, China
| | - Jinsong Li
- State Key Laboratory of Cell Biology, Shanghai Key Laboratory of Molecular Andrology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| |
Collapse
|
14
|
Zhou D, Suzuki T, Asami M, Perry ACF. Caput Epididymidal Mouse Sperm Support Full Development. Dev Cell 2020; 50:5-6. [PMID: 31265812 DOI: 10.1016/j.devcel.2019.05.012] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Dongjie Zhou
- Laboratory of Mammalian Molecular Embryology, Department of Biology and Biochemistry, University of Bath, Bath BA2 7AY, UK
| | - Toru Suzuki
- Laboratory of Mammalian Molecular Embryology, Department of Biology and Biochemistry, University of Bath, Bath BA2 7AY, UK
| | - Maki Asami
- Laboratory of Mammalian Molecular Embryology, Department of Biology and Biochemistry, University of Bath, Bath BA2 7AY, UK
| | - Anthony C F Perry
- Laboratory of Mammalian Molecular Embryology, Department of Biology and Biochemistry, University of Bath, Bath BA2 7AY, UK.
| |
Collapse
|
15
|
Robust DNase activity of the ooplasm can act as a gametic transfection barrier in rainbow trout. Theriogenology 2020; 142:62-66. [PMID: 31574402 DOI: 10.1016/j.theriogenology.2019.09.029] [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: 04/24/2019] [Revised: 08/21/2019] [Accepted: 09/18/2019] [Indexed: 11/23/2022]
Abstract
In this study, we evaluated DNase activity of rainbow trout oocyte using an in vitro and in vivo study. First, synthetic single strand and natural double strand DNA from Eukaryotic and prokaryotic sources as well as naked DNA were in vitro incubated with the oocyte cytoplasm. Results showed that the DNase activity of rainbow trout oocyte is strong enough to degrade any type of DNA at the onset of the incubation. Then, we evaluated if similar to the mammalian species, dead spermatozoa from rainbow trout can protect exogenous DNA from oocyte DNases. A series of dead spermatozoa was incubated with pDB2, carrying EGFP transgene, for 30 min followed by the ooplasm treatment for an additional 30 min. Not only did oocyte DNases completely degrade the exogenous DNA, but also it degraded the compact genome of spermatozoa. In conclusion, in vitro results clearly showed that strong DNase activity of ooplasm could degrade any types of foreign DNAs including oligonucleotides and intensively compact sperm genome. The strong DNase activity of rainbow trout ooplasm could be a stumbling block for genetic modification using plasmids in salmonids.
Collapse
|
16
|
Abstract
New genome-editing tools, such as ZFNs, TALEN, and CRISPR/Cas9, have enabled the generation of gene-modified models effectively in mammals. These technologies are a powerful tool for studying gene function and creating animal models for human diseases. On the other hand, such gene-modified animals are raised in numerous experimental animal facilities, which puts pressure on breeding space and maintenance costs. Embryo and sperm cryopreservation is not only the most simple and cost-effective method available for most gene-modified strains but also the most reliable method to preserve strains to avoid breeding problems and contamination. We have established a reliable, high quality embryo and sperm cryopreservation system for rat strains, ensuring the longevity of these valuable resources for the scientific community. These cryopreserved resources have been successfully used to rederive next generation pups using embryo transfer and intracytoplasmic sperm injection (ICSI). In this chapter, we describe in detail protocols for rat embryo vitrification and sperm cryopreservation followed by pup rederivation using the ICSI procedure and embryo transfer.
Collapse
|
17
|
Rapid and efficient production of genome-edited animals by electroporation into oocytes injected with frozen or freeze-dried sperm. Cryobiology 2019; 90:71-74. [DOI: 10.1016/j.cryobiol.2019.08.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 08/20/2019] [Accepted: 08/20/2019] [Indexed: 11/22/2022]
|
18
|
Benavides F, Rülicke T, Prins JB, Bussell J, Scavizzi F, Cinelli P, Herault Y, Wedekind D. Genetic quality assurance and genetic monitoring of laboratory mice and rats: FELASA Working Group Report. Lab Anim 2019; 54:135-148. [PMID: 31431136 PMCID: PMC7160752 DOI: 10.1177/0023677219867719] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Genetic quality assurance (QA), including genetic monitoring (GeMo) of inbred
strains and background characterization (BC) of genetically altered (GA) animal
models, should be an essential component of any QA programme in laboratory
animal facilities. Genetic quality control is as important for ensuring the
validity of the animal model as health and microbiology monitoring are. It
should be required that studies using laboratory rodents, mainly mice and rats,
utilize genetically defined animals. This paper, presented by the FELASA Working
Group on Genetic Quality Assurance and Genetic Monitoring of Laboratory Murines,
describes the objectives of and available methods for genetic QA programmes in
rodent facilities. The main goals of any genetic QA programme are: (a) to verify
the authenticity and uniformity of inbred stains and substrains, thus ensuring a
genetically reliable colony maintenance; (b) to detect possible genetic
contamination; and (c) to precisely describe the genetic composition of GA
lines. While this publication focuses mainly on mouse and rat genetic QA, the
principles will apply to other rodent species some of which are briefly
mentioned within the context of inbred and outbred stocks.
Collapse
Affiliation(s)
- Fernando Benavides
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas, MD Anderson Cancer Center, USA
| | - Thomas Rülicke
- Institute of Laboratory Animal Science, University of Veterinary Medicine, Vienna, Austria
| | - Jan-Bas Prins
- The Francis Crick Institute, London, UK.,Leiden University Medical Centre, Leiden, The Netherlands
| | - James Bussell
- Biomedical and Veterinary Services Department, University of Oxford, Oxford, UK
| | | | - Paolo Cinelli
- Department of Trauma Surgery, University of Zurich, Zurich, Switzerland
| | - Yann Herault
- Université de Strasbourg, CNRS, INSERM, Institut de Génétique Biologie Moléculaire et Cellulaire, IGBMC, Illkirch, France.,Université de Strasbourg, CNRS, INSERM, Institut Clinique de la Souris, CELPHEDIA-PHENOMIN-ICS, Illkirch, France
| | - Dirk Wedekind
- Institute of Laboratory Animal Science, Hannover Medical School, Hannover, Germany
| |
Collapse
|
19
|
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]
|
20
|
Thornton MA, Mehta MD, Morad TT, Ingraham KL, Khankan RR, Griffis KG, Yeung AK, Zhong H, Roy RR, Edgerton VR, Phelps PE. Evidence of axon connectivity across a spinal cord transection in rats treated with epidural stimulation and motor training combined with olfactory ensheathing cell transplantation. Exp Neurol 2018; 309:119-133. [PMID: 30056160 PMCID: PMC6365019 DOI: 10.1016/j.expneurol.2018.07.015] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Revised: 07/18/2018] [Accepted: 07/24/2018] [Indexed: 12/16/2022]
Abstract
Olfactory ensheathing cells (OECs) are unique glia that support axon outgrowth in the olfactory system, and when used as cellular therapy after spinal cord injury, improve recovery and axon regeneration. Here we assessed the effects of combining OEC transplantation with another promising therapy, epidural electrical stimulation during a rehabilitative motor task. Sprague-Dawley rats received a mid-thoracic transection and transplantation of OECs or fibroblasts (FBs) followed by lumbar stimulation while climbing an inclined grid. We injected pseudorabies virus (PRV) into hindlimb muscles 7 months post-injury to assess connectivity across the transection. Analyses showed that the number of serotonergic (5-HT) axons that crossed the rostral scar border and the area of neurofilament-positive axons in the injury site were both greater in OEC- than FB-treated rats. We detected PRV-labeled cells rostral to the transection and remarkable evidence of 5-HT and PRV axons crossing the injury site in 1 OEC- and 1 FB-treated rat. The axons that crossed suggested either axon regeneration (OEC) or small areas of probable tissue sparing (FB). Most PRV-labeled thoracic neurons were detected in laminae VII or X, and ~25% expressed Chx10, a marker for V2a interneurons. These findings suggest potential regeneration or sparing of circuits that connect thoracic interneurons to lumbar somatic motor neurons. Despite evidence of axonal connectivity, no behavioral changes were detected in this small-scale study. Together these data suggest that when supplemented with epidural stimulation and climbing, OEC transplantation can increase axonal growth across the injury site and may promote recovery of propriospinal circuitry.
Collapse
Affiliation(s)
- Michael A Thornton
- Department of Integrative Biology and Physiology, UCLA, Los Angeles, CA 90095, United States
| | - Manan D Mehta
- Department of Integrative Biology and Physiology, UCLA, Los Angeles, CA 90095, United States
| | - Tyler T Morad
- Department of Integrative Biology and Physiology, UCLA, Los Angeles, CA 90095, United States
| | - Kaitlin L Ingraham
- Department of Integrative Biology and Physiology, UCLA, Los Angeles, CA 90095, United States; Molecular, Cellular and Integrative Physiology, Interdepartmental Ph.D. Program, UCLA, Los Angeles, CA 90095, United States
| | - Rana R Khankan
- Department of Integrative Biology and Physiology, UCLA, Los Angeles, CA 90095, United States; Molecular, Cellular and Integrative Physiology, Interdepartmental Ph.D. Program, UCLA, Los Angeles, CA 90095, United States
| | - Khris G Griffis
- Department of Integrative Biology and Physiology, UCLA, Los Angeles, CA 90095, United States; Molecular, Cellular and Integrative Physiology, Interdepartmental Ph.D. Program, UCLA, Los Angeles, CA 90095, United States
| | - Anthony K Yeung
- Department of Integrative Biology and Physiology, UCLA, Los Angeles, CA 90095, United States
| | - Hui Zhong
- Department of Integrative Biology and Physiology, UCLA, Los Angeles, CA 90095, United States
| | - Roland R Roy
- Department of Integrative Biology and Physiology, UCLA, Los Angeles, CA 90095, United States; Brain Research Institute, UCLA, Los Angeles, CA 90095, United States
| | - V Reggie Edgerton
- Department of Integrative Biology and Physiology, UCLA, Los Angeles, CA 90095, United States; Molecular, Cellular and Integrative Physiology, Interdepartmental Ph.D. Program, UCLA, Los Angeles, CA 90095, United States; Brain Research Institute, UCLA, Los Angeles, CA 90095, United States
| | - Patricia E Phelps
- Department of Integrative Biology and Physiology, UCLA, Los Angeles, CA 90095, United States; Molecular, Cellular and Integrative Physiology, Interdepartmental Ph.D. Program, UCLA, Los Angeles, CA 90095, United States; Brain Research Institute, UCLA, Los Angeles, CA 90095, United States.
| |
Collapse
|
21
|
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.
Collapse
|
22
|
Sánchez-Villalba E, Arias ME, Loren P, Fuentes F, Pereyra-Bonnet F, Salamone D, Felmer R. Improved expression of green fluorescent protein in cattle embryos produced by ICSI-mediated gene transfer with spermatozoa treated with streptolysin-O. Anim Reprod Sci 2018; 196:130-137. [PMID: 30033189 DOI: 10.1016/j.anireprosci.2018.07.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Revised: 06/26/2018] [Accepted: 07/16/2018] [Indexed: 12/30/2022]
Abstract
The ICSI-sperm mediated gene transfer (ICSI-SMGT) has been used to produce transgenic mice with high efficiency; however, the efficiency of this technique in farm animals is still less than desirable. Pretreatment of sperm with membrane destabilizing agents can improve the efficiency of ICSI in cattle. The objective of the present study was to evaluate streptolysin-O (SLO) as a novel treatment to permeabilize the bovine sperm membrane and assess its effect on efficiency of generating transgenic embryos by ICSI-SMGT. First, there was evaluation of the plasma membrane integrity (SYBR/PI), acrosome membrane integrity (PNA/FITC), DNA damage (TUNEL) and binding capacity of exogenous DNA (Nick Translation) in bull sperm treated with SLO. Subsequently, there was assessment of embryonic development and the efficiency in generating transgenic embryos with enhanced expression of the gene for green fluorescent protein (EGFP). Results indicate that SLO efficiently permeabilizes the plasma and acrosome membranes of bull spermatozoa and increases binding of exogenous DNA mostly to the post-acrosomal region and tail without greatly affecting the integrity of the DNA. Furthermore, treatment of bull spermatozoa with SLO prior to the injection of oocytes by ICSI-SMGT significantly increased the rate of embryo expression of the EGFP gene. Future experiments are still needed to determine the effect of this treatment on the development and transgene expression in fetuses and animals produced by ICSI-SMGT.
Collapse
Affiliation(s)
- Esther Sánchez-Villalba
- Laboratory of Reproduction, Centre of Reproductive Biotechnology (CEBIOR-BIOREN), Faculty of Medicine, Universidad de La Frontera, Temuco, Chile; Student of Doctoral Program in Sciences in Applied Cellular and Molecular Biology, Universidad de La Frontera, Temuco, Chile
| | - María Elena Arias
- Laboratory of Reproduction, Centre of Reproductive Biotechnology (CEBIOR-BIOREN), Faculty of Medicine, Universidad de La Frontera, Temuco, Chile; Department of Animal Production, Faculty of Agriculture and Forestry Sciences, Universidad de La Frontera, Temuco, Chile
| | - Pía Loren
- Laboratory of Reproduction, Centre of Reproductive Biotechnology (CEBIOR-BIOREN), Faculty of Medicine, Universidad de La Frontera, Temuco, Chile; Student of Doctoral Program in Sciences in Applied Cellular and Molecular Biology, Universidad de La Frontera, Temuco, Chile
| | - Fernanda Fuentes
- Laboratory of Reproduction, Centre of Reproductive Biotechnology (CEBIOR-BIOREN), Faculty of Medicine, Universidad de La Frontera, Temuco, Chile
| | - Federico Pereyra-Bonnet
- Basic Science and Experimental Medicine Institute, University Institute, Hospital Italiano de Buenos Aires (HIBA), Buenos Aires, Argentina
| | - Daniel Salamone
- Laboratory of Animal Biotechnology, Faculty of Agricultural Sciences, Universidad de Buenos Aires-CONICET, Buenos Aires, Argentina
| | - Ricardo Felmer
- Laboratory of Reproduction, Centre of Reproductive Biotechnology (CEBIOR-BIOREN), Faculty of Medicine, Universidad de La Frontera, Temuco, Chile; Department of Agricultural Sciences and Natural Resources, Faculty of Agriculture and Forestry Sciences, Universidad de La Frontera, Temuco, Chile.
| |
Collapse
|
23
|
Suzuki T, Asami M, Patel SG, Luk LYP, Tsai YH, Perry ACF. Switchable genome editing via genetic code expansion. Sci Rep 2018; 8:10051. [PMID: 29968790 PMCID: PMC6030211 DOI: 10.1038/s41598-018-28178-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 06/11/2018] [Indexed: 01/07/2023] Open
Abstract
Multiple applications of genome editing by CRISPR-Cas9 necessitate stringent regulation and Cas9 variants have accordingly been generated whose activity responds to small ligands, temperature or light. However, these approaches are often impracticable, for example in clinical therapeutic genome editing in situ or gene drives in which environmentally-compatible control is paramount. With this in mind, we have developed heritable Cas9-mediated mammalian genome editing that is acutely controlled by the cheap lysine derivative, Lys(Boc) (BOC). Genetic code expansion permitted non-physiological BOC incorporation such that Cas9 (Cas9BOC) was expressed in a full-length, active form in cultured somatic cells only after BOC exposure. Stringently BOC-dependent, heritable editing of transgenic and native genomic loci occurred when Cas9BOC was expressed at the onset of mouse embryonic development from cRNA or Cas9BOC transgenic females. The tightly controlled Cas9 editing system reported here promises to have broad applications and is a first step towards purposed, spatiotemporal gene drive regulation over large geographical ranges.
Collapse
Affiliation(s)
- Toru Suzuki
- Laboratory of Mammalian Molecular Embryology, Department of Biology and Biochemistry, University of Bath, Bath, BA2 7AY, England
| | - Maki Asami
- Laboratory of Mammalian Molecular Embryology, Department of Biology and Biochemistry, University of Bath, Bath, BA2 7AY, England
| | - Sanjay G Patel
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, Wales
| | - Louis Y P Luk
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, Wales
| | - Yu-Hsuan Tsai
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, Wales.
| | - Anthony C F Perry
- Laboratory of Mammalian Molecular Embryology, Department of Biology and Biochemistry, University of Bath, Bath, BA2 7AY, England.
| |
Collapse
|
24
|
Lu F, Luo C, Li N, Liu Q, Wei Y, Deng H, Wang X, Li X, Jiang J, Deng Y, Shi D. Efficient Generation of Transgenic Buffalos (Bubalus bubalis) by Nuclear Transfer of Fetal Fibroblasts Expressing Enhanced Green Fluorescent Protein. Sci Rep 2018; 8:6967. [PMID: 29725050 PMCID: PMC5934360 DOI: 10.1038/s41598-018-25120-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Accepted: 04/11/2018] [Indexed: 01/01/2023] Open
Abstract
The possibility of producing transgenic cloned buffalos by nuclear transfer of fetal fibroblasts expressing enhanced green fluorescent protein (EGFP) was explored in this study. When buffalo fetal fibroblasts (BFFs) isolated from a male buffalo fetus were transfected with pEGFP-N1 (EGFP is driven by CMV and Neo is driven by SV-40) by means of electroporation, Lipofectamine-LTX and X-tremeGENE, the transfection efficiency of electroporation (35.5%) was higher than Lipofectamine-LTX (11.7%) and X-tremeGENE (25.4%, P < 0.05). When BFFs were transfected by means of electroporation, more embryos from BFFs transfected with pEGFP-IRES-Neo (EGFP and Neo are driven by promoter of human elongation factor) cleaved and developed to blastocysts (21.6%) compared to BFFs transfected with pEGFP-N1 (16.4%, P < 0.05). A total of 72 blastocysts were transferred into 36 recipients and six recipients became pregnant. In the end of gestation, the pregnant recipients delivered six healthy calves and one stillborn calf. These calves were confirmed to be derived from the transgenic cells by Southern blot and microsatellite analysis. These results indicate that electroporation is more efficient than lipofection in transfecting exogenous DNA into BFFs and transgenic buffalos can be produced effectively by nuclear transfer of BFFs transfected with pEGFP-IRES-Neo.
Collapse
Affiliation(s)
- Fenghua Lu
- Guangxi High Education Key Laboratory for Animal Reproduction and Biotechnology, State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi University, Nanning, 530005, China
| | - Chan Luo
- Guangxi High Education Key Laboratory for Animal Reproduction and Biotechnology, State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi University, Nanning, 530005, China
| | - Nan Li
- Guangxi High Education Key Laboratory for Animal Reproduction and Biotechnology, State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi University, Nanning, 530005, China.,Reproductive Center of Liuzhou Municipal Maternity and Child Healthcare Hospital, Liuzhou, 545001, China
| | - Qingyou Liu
- Guangxi High Education Key Laboratory for Animal Reproduction and Biotechnology, State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi University, Nanning, 530005, China
| | - Yingming Wei
- Guangxi High Education Key Laboratory for Animal Reproduction and Biotechnology, State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi University, Nanning, 530005, China
| | - Haiying Deng
- Guangxi High Education Key Laboratory for Animal Reproduction and Biotechnology, State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi University, Nanning, 530005, China
| | - Xiaoli Wang
- Guangxi High Education Key Laboratory for Animal Reproduction and Biotechnology, State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi University, Nanning, 530005, China
| | - Xiangping Li
- Guangxi High Education Key Laboratory for Animal Reproduction and Biotechnology, State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi University, Nanning, 530005, China
| | - Jianrong Jiang
- Guangxi High Education Key Laboratory for Animal Reproduction and Biotechnology, State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi University, Nanning, 530005, China
| | - Yanfei Deng
- Guangxi High Education Key Laboratory for Animal Reproduction and Biotechnology, State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi University, Nanning, 530005, China
| | - Deshun Shi
- Guangxi High Education Key Laboratory for Animal Reproduction and Biotechnology, State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi University, Nanning, 530005, China.
| |
Collapse
|
25
|
Águila L, Felmer R, Arias ME, Navarrete F, Martin-Hidalgo D, Lee HC, Visconti P, Fissore R. Defective sperm head decondensation undermines the success of ICSI in the bovine. Reproduction 2018; 154:307-318. [PMID: 28751536 DOI: 10.1530/rep-17-0270] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Revised: 06/20/2017] [Accepted: 06/30/2017] [Indexed: 12/25/2022]
Abstract
The efficiency of intracytoplasmic sperm injection (ICSI) in the bovine is low compared to other species. It is unknown whether defective oocyte activation and/or sperm head decondensation limit the success of this technique in this species. To elucidate where the main obstacle lies, we used homologous and heterologous ICSI and parthenogenetic activation procedures. We also evaluated whether in vitro maturation negatively impacted the early stages of activation after ICSI. Here we showed that injected bovine sperm are resistant to nuclear decondensation by bovine oocytes and this is only partly overcome by exogenous activation. Remarkably, when we used heterologous ICSI, in vivo-matured mouse eggs were capable of mounting calcium oscillations and displaying normal PN formation following injection of bovine sperm, although in vitro-matured mouse oocytes were unable to do so. Together, our data demonstrate that bovine sperm are especially resistant to nuclear decondensation by in vitro-matured oocytes and this deficiency cannot be simply overcome by exogenous activation protocols, even by inducing physiological calcium oscillations. Therefore, the inability of a suboptimal ooplasmic environment to induce sperm head decondensation limits the success of ICSI in the bovine. Studies aimed to improve the cytoplasmic milieu of in vitro-matured oocytes and to replicate the molecular changes associated with in vivo capacitation and acrosome reaction will deepen our understanding of the mechanism of fertilization and improve the success of ICSI in this species.
Collapse
Affiliation(s)
- Luis Águila
- Laboratory of Reproduction, Centre of Reproductive Biotechnology (CEBIOR-BIOREN), Universidad de La Frontera, Temuco, Chile.,Department of Agricultural Sciences and Natural Resources, Faculty of Agriculture and Forestry, Universidad de La Frontera, Temuco, Chile.,School of Veterinary Medicine, Faculty of Sciences, Universidad Mayor Sede Temuco, Temuco, Chile
| | - Ricardo Felmer
- Laboratory of Reproduction, Centre of Reproductive Biotechnology (CEBIOR-BIOREN), Universidad de La Frontera, Temuco, Chile.,Department of Agricultural Sciences and Natural Resources, Faculty of Agriculture and Forestry, Universidad de La Frontera, Temuco, Chile
| | - María Elena Arias
- Laboratory of Reproduction, Centre of Reproductive Biotechnology (CEBIOR-BIOREN), Universidad de La Frontera, Temuco, Chile.,Department of Agricultural Sciences and Natural Resources, Faculty of Agriculture and Forestry, Universidad de La Frontera, Temuco, Chile
| | - Felipe Navarrete
- Department of Veterinary and Animal Science, Integrated Sciences Building, University of Massachusetts, Amherst, Massachusetts, USA
| | - David Martin-Hidalgo
- Research Group of Intracellular Signaling and Technology of Reproduction, Research Institute INBIO G+C, University of Extremadura, Caceres, Spain.,Department of Veterinary and Animal Science, Integrated Sciences Building, University of Massachusetts, Amherst, Massachusetts, USA
| | - Hoi Chang Lee
- Department of Veterinary and Animal Science, Integrated Sciences Building, University of Massachusetts, Amherst, Massachusetts, USA
| | - Pablo Visconti
- Department of Veterinary and Animal Science, Integrated Sciences Building, University of Massachusetts, Amherst, Massachusetts, USA
| | - Rafael Fissore
- Department of Veterinary and Animal Science, Integrated Sciences Building, University of Massachusetts, Amherst, Massachusetts, USA
| |
Collapse
|
26
|
Improved exogenous DNA uptake in bovine spermatozoa and gene expression in embryos using membrane destabilizing agents in ICSI-SMGT. ZYGOTE 2018; 26:104-109. [PMID: 29334034 DOI: 10.1017/s0967199417000727] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Sperm-mediated gene transfer (SMGT) is a simple, fast, and economical biotechnological tool for producing transgenic animals. However, transgene expression with this technique in bovine embryos is still inefficient due to low uptake and binding of exogenous DNA in spermatozoa. The present study evaluated the effects of sperm membrane destabilization on the binding capacity, location and quantity of bound exogenous DNA in cryopreserved bovine spermatozoa using Triton X-100 (TX-100), lysolecithin (LL) and sodium hydroxide (NaOH). Effects of these treatments were also evaluated by intracytoplasmic sperm injection (ICSI)-SMGT. Results showed that all treatments bound exogenous DNA to spermatozoa including the control. Spermatozoa treated with different membrane destabilizing agents bound the exogenous DNA throughout the head and tail of spermatozoa, compared with the control, in which binding occurred mainly in the post-acrosomal region and tail. The amount of exogenous DNA bound to spermatozoa was much higher for the different sperm treatments than the control (P < 0.05), most likely due to the damage induced by these treatments to the plasma and acrosomal membranes. Exogenous gene expression in embryos was also improved by these treatments. These results demonstrated that sperm membrane destabilization could be a novel strategy in bovine SMGT protocols for the generation of transgenic embryos by ICSI.
Collapse
|
27
|
Salamone DF, Canel NG, Rodríguez MB. Intracytoplasmic sperm injection in domestic and wild mammals. Reproduction 2017; 154:F111-F124. [PMID: 29196493 DOI: 10.1530/rep-17-0357] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Revised: 11/21/2017] [Accepted: 12/01/2017] [Indexed: 11/08/2022]
Abstract
Intracytoplasmic sperm injection (ICSI) has become a useful technique for clinical applications in the horse-breeding industry. However, both ICSI blastocyst and offspring production continues to be limited for most farm and wild species. This article reviews technical differences of ICSI performance among species, possible biological and methodological reasons for the variable efficiency and potential strategies to improve the outcomes. One of the major applications of ICSI in animal production is the reproduction of high-value specimens. Unfortunately, some domestic species like the bovine show low rates of pronuclei formation after sperm injection, which led to the development of various artificial activation protocols and sperm pre-treatments that are discussed in this article. The impact of ICSI technique on equine breeding programs is considered in detail, since in contrast to other species, its use for elite horse reproduction has increased in recent years. ICSI has also been used to produce genetically modified animals; however, despite numerous attempts in several domestic species, only transgenic pigs have been consistently produced. Finally, the ICSI is a promising tool for genetic rescue of endangered and wild species. In conclusion, while ICSI has become a consistent ART for some species, it needs further development for others. The low results obtained for some domestic species, the high training needed and the equipment required have limited this technique to the production of elite specimens or for research purposes.
Collapse
Affiliation(s)
- Daniel F Salamone
- Laboratorio de Biotecnologia Animal, Facultad de Agronomia, Universidad de Buenos Aires-CONICETBuenos Aires, Argentina
| | - Natalia G Canel
- Laboratorio de Biotecnologia Animal, Facultad de Agronomia, Universidad de Buenos Aires-CONICETBuenos Aires, Argentina
| | - María Belén Rodríguez
- Laboratorio de Biotecnologia Animal, Facultad de Agronomia, Universidad de Buenos Aires-CONICETBuenos Aires, Argentina
| |
Collapse
|
28
|
Liao JH, Tsai CH, Patel SG, Yang JT, Tu IF, Lo Cicero M, Lipka-Lloyd M, Wu WL, Shen WJ, Ho MR, Chou CC, Sharma GR, Okanishi H, Luk LYP, Tsai YH, Wu SH. Acetylome of Acinetobacter baumannii SK17 Reveals a Highly-Conserved Modification of Histone-Like Protein HU. Front Mol Biosci 2017; 4:77. [PMID: 29230394 PMCID: PMC5711770 DOI: 10.3389/fmolb.2017.00077] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Accepted: 11/06/2017] [Indexed: 12/27/2022] Open
Abstract
Lysine acetylation is a prevalent post-translational modification in both eukaryotes and prokaryotes. Whereas this modification is known to play pivotal roles in eukaryotes, the function and extent of this modification in prokaryotic cells remain largely unexplored. Here we report the acetylome of a pair of antibiotic-sensitive and -resistant nosocomial pathogen Acinetobacter baumannii SK17-S and SK17-R. A total of 145 lysine acetylation sites on 125 proteins was identified, and there are 23 acetylated proteins found in both strains, including histone-like protein HU which was found to be acetylated at Lys13. HU is a dimeric DNA-binding protein critical for maintaining chromosomal architecture and other DNA-dependent functions. To analyze the effects of site-specific acetylation, homogenously Lys13-acetylated HU protein, HU(K13ac) was prepared by genetic code expansion. Whilst not exerting an obvious effect on the oligomeric state, Lys13 acetylation alters both the thermal stability and DNA binding kinetics of HU. Accordingly, this modification likely destabilizes the chromosome structure and regulates bacterial gene transcription. This work indicates that acetyllysine plays an important role in bacterial epigenetics.
Collapse
Affiliation(s)
- Jiahn-Haur Liao
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Cheng-Han Tsai
- Institute of Biochemical Sciences, National Taiwan University, Taipei, Taiwan
| | - Sanjay G Patel
- School of Chemistry, Cardiff University, Cardiff, United Kingdom
| | - Jhih-Tian Yang
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan.,Ph.D. Program in Microbial Genomics, National Chung Hsing University, Academia Sinica, Taipei, Taiwan
| | - I-Fan Tu
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Matteo Lo Cicero
- School of Chemistry, Cardiff University, Cardiff, United Kingdom
| | | | - Wan-Ling Wu
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Wen-Jie Shen
- Institute of Biochemical Sciences, National Taiwan University, Taipei, Taiwan
| | - Meng-Ru Ho
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Chi-Chi Chou
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Garima R Sharma
- School of Chemistry, Cardiff University, Cardiff, United Kingdom.,Republic Polytechnic, Singapore, Singapore
| | - Hiroki Okanishi
- Department of Tumor Genetics and Biology, Kumamoto University, Kumamoto, Japan
| | - Louis Y P Luk
- School of Chemistry, Cardiff University, Cardiff, United Kingdom
| | - Yu-Hsuan Tsai
- School of Chemistry, Cardiff University, Cardiff, United Kingdom
| | - Shih-Hsiung Wu
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan.,Institute of Biochemical Sciences, National Taiwan University, Taipei, Taiwan.,Department of Chemistry, National Taiwan University, Taipei, Taiwan
| |
Collapse
|
29
|
Lamas-Toranzo I, Guerrero-Sánchez J, Miralles-Bover H, Alegre-Cid G, Pericuesta E, Bermejo-Álvarez P. CRISPR is knocking on barn door. Reprod Domest Anim 2017; 52 Suppl 4:39-47. [DOI: 10.1111/rda.13047] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
| | | | | | - G Alegre-Cid
- Departamento de Reproducción Animal; INIA; Madrid Spain
| | - E Pericuesta
- Departamento de Reproducción Animal; INIA; Madrid Spain
| | | |
Collapse
|
30
|
Suppressing mosaicism by Au nanowire injector-driven direct delivery of plasmids into mouse embryos. Biomaterials 2017; 138:169-178. [DOI: 10.1016/j.biomaterials.2017.05.044] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2017] [Revised: 05/16/2017] [Accepted: 05/26/2017] [Indexed: 12/12/2022]
|
31
|
Zhang S, Lu F, Liu Q, Liu Y, Guan X, Wei Y, Tan S, Shi D. Efficient generation of sFat-1 transgenic rabbits rich in n-3 polyunsaturated fatty acids by intracytoplasmic sperm injection. Reprod Fertil Dev 2017; 28:310-8. [PMID: 25027718 DOI: 10.1071/rd13413] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2013] [Accepted: 05/20/2014] [Indexed: 01/28/2023] Open
Abstract
N-3 polyunsaturated fatty acids (n-3 PUFAs) have their first double bond at the third carbon from the methyl end of the fatty-acid chain and had been proven to be beneficial to human health. However, mammals cannot produce n-3 PUFAs by themselves because they lack the n-3 fatty-acid desaturase (Fat-1) gene. Thus, the possibility of producing sFat-1 transgenic rabbits was explored in this study. The transgenic cassette of pPGK1-sFat-1-CMV-EGFP was constructed and transgenic rabbit embryos were produced by intracytoplasmic sperm injection (ICSI). When 123 EGFP-positive embryos at the 2-8-cell stage were transplanted into the oviduct of four oestrous-synchronised recipients, two of them became pregnant and gave birth to seven pups. However, transfer of embryos into the uterus of oestrous-synchronised recipients and oviduct or uterus of oocyte donor rabbits did not result in pregnancy. The integration of the sFat-1 gene was confirmed in six of the seven live pups by PCR and Southern blot. The expression of the sFat-1 gene in the six transgenic pups was also detected by reverse transcription polymerase chain reaction (RT-PCR). Gas chromatography-mass spectrometry analysis revealed that transgenic rabbits exhibited an ~15-fold decrease in the ratio of n-6:n-3 PUFAs in muscle compared with wild-type rabbits and non-transgenic rabbits. These results demonstrate that sFat-1 transgenic rabbits can be produced by ICSI and display a low ratio of n-6:n-3 PUFAs.
Collapse
Affiliation(s)
- Shun Zhang
- State Key Laboratory for Conservation and Utilisation of Subtropical Agro-Bioresources, Guangxi University, Nanning 530004, China
| | - Fenghua Lu
- State Key Laboratory for Conservation and Utilisation of Subtropical Agro-Bioresources, Guangxi University, Nanning 530004, China
| | - Qingyou Liu
- State Key Laboratory for Conservation and Utilisation of Subtropical Agro-Bioresources, Guangxi University, Nanning 530004, China
| | - Yubing Liu
- State Key Laboratory for Conservation and Utilisation of Subtropical Agro-Bioresources, Guangxi University, Nanning 530004, China
| | - Xiaomei Guan
- State Key Laboratory for Conservation and Utilisation of Subtropical Agro-Bioresources, Guangxi University, Nanning 530004, China
| | - Yingming Wei
- State Key Laboratory for Conservation and Utilisation of Subtropical Agro-Bioresources, Guangxi University, Nanning 530004, China
| | - Shijian Tan
- State Key Laboratory for Conservation and Utilisation of Subtropical Agro-Bioresources, Guangxi University, Nanning 530004, China
| | - Deshun Shi
- State Key Laboratory for Conservation and Utilisation of Subtropical Agro-Bioresources, Guangxi University, Nanning 530004, China
| |
Collapse
|
32
|
Bai DP, Yang MM, Qu L, Chen YL. Generation of a transgenic cashmere goat using the piggyBac transposition system. Theriogenology 2017; 93:1-6. [DOI: 10.1016/j.theriogenology.2017.01.036] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2016] [Revised: 01/19/2017] [Accepted: 01/21/2017] [Indexed: 01/04/2023]
|
33
|
Canel NG, Bevacqua RJ, Hiriart MI, Rabelo NC, de Almeida Camargo LS, Romanato M, de Calvo LP, Salamone DF. Sperm pretreatment with heparin and l-glutathione, sex-sorting, and double cryopreservation to improve intracytoplasmic sperm injection in bovine. Theriogenology 2017; 93:62-70. [DOI: 10.1016/j.theriogenology.2016.12.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Revised: 12/14/2016] [Accepted: 12/16/2016] [Indexed: 11/30/2022]
|
34
|
Zeng F, Li Z, Cai G, Gao W, Jiang G, Liu D, Urschitz J, Moisyadi S, Wu Z. Characterization of Growth and Reproduction Performance, Transgene Integration, Expression, and Transmission Patterns in Transgenic Pigs Produced by piggyBac Transposition-Mediated Gene Transfer. Anim Biotechnol 2017; 27:245-55. [PMID: 27565868 DOI: 10.1080/10495398.2016.1178140] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Previously we successfully produced a group of EGFP-expressing founder transgenic pigs by a newly developed efficient and simple pig transgenesis method based on cytoplasmic injection of piggyBac plasmids. In this study, we investigated the growth and reproduction performance and characterized the transgene insertion, transmission, and expression patterns in transgenic pigs generated by piggyBac transposition. Results showed that transgene has no injurious effect on the growth and reproduction of transgenic pigs. Multiple copies of monogenic EGFP transgene were inserted at noncoding sequences of host genome, and passed from founder transgenic pigs to their transgenic offspring in segregation or linkage manner. The EGFP transgene was ubiquitously expressed in transgenic pigs, and its expression intensity was associated with transgene copy number but not related to its promoter DNA methylation level. To the best of our knowledge, this is first study that fully described the growth and reproduction performance, transgene insertion, expression, and transmission profiles in transgenic pigs produced by piggyBac system. It not only demonstrates that piggyBac transposition-mediated gene transfer is an effective and favorable approach for pig transgenesis, but also provides scientific information for understanding the transgene insertion, expression and transmission patterns in transgenic animals produced by piggyBac transposition.
Collapse
Affiliation(s)
- Fang Zeng
- a National Engineering Research Center for Breeding Swine Industry, College of Animal Science , South China Agricultural University , Guangzhou , China.,b Guangdong Provincial Key Laboratory of Agro-animal Genomics and Molecular Breeding, College of Animal Science , South China Agricultural University , Guangzhou , China
| | - Zicong Li
- a National Engineering Research Center for Breeding Swine Industry, College of Animal Science , South China Agricultural University , Guangzhou , China.,b Guangdong Provincial Key Laboratory of Agro-animal Genomics and Molecular Breeding, College of Animal Science , South China Agricultural University , Guangzhou , China
| | - Gengyuan Cai
- c Institute of Animal Science , Guangdong Academy of Agricultural Sciences , Guangzhou , China
| | - Wenchao Gao
- a National Engineering Research Center for Breeding Swine Industry, College of Animal Science , South China Agricultural University , Guangzhou , China.,b Guangdong Provincial Key Laboratory of Agro-animal Genomics and Molecular Breeding, College of Animal Science , South China Agricultural University , Guangzhou , China
| | - Gelong Jiang
- a National Engineering Research Center for Breeding Swine Industry, College of Animal Science , South China Agricultural University , Guangzhou , China.,b Guangdong Provincial Key Laboratory of Agro-animal Genomics and Molecular Breeding, College of Animal Science , South China Agricultural University , Guangzhou , China
| | - Dewu Liu
- a National Engineering Research Center for Breeding Swine Industry, College of Animal Science , South China Agricultural University , Guangzhou , China.,b Guangdong Provincial Key Laboratory of Agro-animal Genomics and Molecular Breeding, College of Animal Science , South China Agricultural University , Guangzhou , China
| | - Johann Urschitz
- d Institute for Biogenesis Research, Department of Anatomy, Biochemistry and Physiology, John A. Burns School of Medicine , University of Hawaii at Manoa , Honolulu , Hawaii , USA
| | - Stefan Moisyadi
- d Institute for Biogenesis Research, Department of Anatomy, Biochemistry and Physiology, John A. Burns School of Medicine , University of Hawaii at Manoa , Honolulu , Hawaii , USA.,e Manoa BioSciences , Honolulu , Hawaii , USA
| | - Zhenfang Wu
- a National Engineering Research Center for Breeding Swine Industry, College of Animal Science , South China Agricultural University , Guangzhou , China.,b Guangdong Provincial Key Laboratory of Agro-animal Genomics and Molecular Breeding, College of Animal Science , South China Agricultural University , Guangzhou , China
| |
Collapse
|
35
|
References. Lab Anim 2016. [DOI: 10.1258/002367703766452985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
36
|
Effect of transfection and co-incubation of bovine sperm with exogenous DNA on sperm quality and functional parameters for its use in sperm-mediated gene transfer. ZYGOTE 2016; 25:85-97. [PMID: 27928970 DOI: 10.1017/s096719941600037x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Sperm-mediated gene transfer (SMGT) is based on the capacity of sperm to bind exogenous DNA and transfer it into the oocyte during fertilization. In bovines, the progress of this technology has been slow due to the poor reproducibility and efficiency of the production of transgenic embryos. The aim of the present study was to evaluate the effects of different sperm transfection systems on the quality and functional parameters of sperm. Additionally, the ability of sperm to bind and incorporate exogenous DNA was assessed. These analyses were carried out by flow cytometry and confocal fluorescence microscopy, and motility parameters were also evaluated by computer-assisted sperm analysis (CASA). Transfection was carried out using complexes of plasmid DNA with Lipofectamine, SuperFect and TurboFect for 0.5, 1, 2 or 4 h. The results showed that all of the transfection treatments promoted sperm binding and incorporation of exogenous DNA, similar to sperm incorporation of DNA alone, without affecting the viability. Nevertheless, the treatments and incubation times significantly affected the motility parameters, although no effect on the integrity of DNA or the levels of reactive oxygen species (ROS) was observed. Additionally, we observed that transfection using SuperFect and TurboFect negatively affected the acrosome integrity, and TurboFect affected the mitochondrial membrane potential of sperm. In conclusion, we demonstrated binding and incorporation of exogenous DNA by sperm after transfection and confirmed the capacity of sperm to spontaneously incorporate exogenous DNA. These findings will allow the establishment of the most appropriate method [intracytoplasmic sperm injection (ICSI) or in vitro fertilization (IVF)] of generating transgenic embryos via SMGT based on the fertilization capacity of transfected sperm.
Collapse
|
37
|
Crotamine, a cell-penetrating peptide, is able to translocate parthenogenetic and in vitro fertilized bovine embryos but does not improve exogenous DNA expression. J Assist Reprod Genet 2016; 33:1405-1413. [PMID: 27515309 DOI: 10.1007/s10815-016-0772-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Accepted: 07/07/2016] [Indexed: 10/21/2022] Open
Abstract
PURPOSE Crotamine is capable of penetrating cells and embryos and transfecting cells with exogenous DNA. However, no studies are available regarding its uptake by parthenogenetic (PA) embryos or its use for transfection in in vitro fertilized (IVF) embryos. This study aimed to determine the translocation kinetics of crotamine into PA and IVF bovine embryos and assess its effect over in vitro development of PA embryos. Moreover, crotamine-DNA complexes were used to test the transfection ability of crotamine in bovine IVF zygotes. METHODS PA and IVF embryos were exposed to labeled crotamine for four interval times. Embryo toxicity was assayed over PA embryos after 24 h of exposure to crotamine. Additionally, IVF embryos were exposed to or injected with a complex formed by crotamine and pCX-EGFP plasmid. RESULTS Confocal images revealed that crotamine was uptaken by PA and IVF embryos as soon as 1 h after exposure. Crotamine exposure did not affect two to eight cells and blastocyst rates or blastocyst cell number (p > 0.05) of PA embryos. Regarding transfection, exposure or injection into the perivitelline space with crotamine-DNA complex did not result in transgene-expressing embryos. Nevertheless, intracytoplasmic injection of plasmid alone showed higher expression rates than did injection with crotamine-DNA complex at days 4 and 7 (p < 0.05). CONCLUSIONS Crotamine is able to translocate through zona pellucida (ZP) of PA and IVF embryos within 1 h of exposure without impairing in vitro development. However, the use of crotamine does not improve exogenous DNA expression in cattle embryos, probably due to the tight complexation of DNA with crotamine.
Collapse
|
38
|
Azevedo A, Prado A, Issa J, Gerlach R. Matrix metalloproteinase 2 fused to GFP, expressed in E. coli, successfully tracked MMP-2 distribution in vivo. Int J Biol Macromol 2016; 89:737-45. [DOI: 10.1016/j.ijbiomac.2016.05.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Revised: 05/03/2016] [Accepted: 05/04/2016] [Indexed: 01/22/2023]
|
39
|
Khankan RR, Griffis KG, Haggerty-Skeans JR, Zhong H, Roy RR, Edgerton VR, Phelps PE. Olfactory Ensheathing Cell Transplantation after a Complete Spinal Cord Transection Mediates Neuroprotective and Immunomodulatory Mechanisms to Facilitate Regeneration. J Neurosci 2016; 36:6269-86. [PMID: 27277804 PMCID: PMC4899528 DOI: 10.1523/jneurosci.0085-16.2016] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Revised: 04/28/2016] [Accepted: 05/02/2016] [Indexed: 12/31/2022] Open
Abstract
UNLABELLED Multiple neural and peripheral cell types rapidly respond to tissue damage after spinal cord injury to form a structurally and chemically inhibitory scar that limits axon regeneration. Astrocytes form an astroglial scar and produce chondroitin sulfate proteoglycans (CSPGs), activate microglia, and recruit blood-derived immune cells to the lesion for debris removal. One beneficial therapy, olfactory ensheathing cell (OEC) transplantation, results in functional improvements and promotes axon regeneration after spinal cord injury. The lack of an OEC-specific marker, however, has limited the investigation of mechanisms underlying their proregenerative effects. We compared the effects of enhanced green fluorescent protein-labeled fibroblast (FB) and OEC transplants acutely after a complete low-thoracic spinal cord transection in adult rats. We assessed the preservation of neurons and serotonergic axons, the levels of inhibitory CSPGs and myelin debris, and the extent of immune cell activation between 1 and 8 weeks postinjury. Our findings indicate that OECs survive longer than FBs post-transplantation, preserve axons and neurons, and reduce inhibitory molecules in the lesion core. Additionally, we show that OECs limit immune-cell activation and infiltration, whereas FBs alter astroglial scar formation and increase immune-cell infiltration and concomitant secondary tissue damage. Administration of cyclosporine-A to enhance graft survival demonstrated that immune suppression can augment OEC contact-mediated protection of axons and neurons during the first 2 weeks postinjury. Collectively, these data suggest that OECs have neuroprotective and immunomodulatory mechanisms that create a supportive environment for neuronal survival and axon regeneration after spinal cord injury. SIGNIFICANCE STATEMENT Spinal cord injury creates physical and chemical barriers to axon regeneration. We used a complete spinal cord transection model and olfactory ensheathing cell (OEC) or fibroblast (FB; control) transplantation as a repair strategy. OECs, but not FBs, intermingled with astrocytes, facilitated astroglial scar border formation and sequestered invading peripheral cells. OECs attenuated immune cell infiltration, reduced secondary tissue damage, protected neurons and axons in the lesion core, and helped clear myelin debris. Immunosuppression enhanced survival of OECs and FBs, but only OEC transplantation promoted scaffold formation in the lesion site that facilitated axon regeneration and neuron preservation.
Collapse
Affiliation(s)
| | | | | | - Hui Zhong
- Brain Research Institute, University of California-Los Angeles, Los Angeles, California 90095
| | - Roland R Roy
- Department of Integrative Biology and Physiology, and Brain Research Institute, University of California-Los Angeles, Los Angeles, California 90095
| | - V Reggie Edgerton
- Department of Integrative Biology and Physiology, and Brain Research Institute, University of California-Los Angeles, Los Angeles, California 90095
| | - Patricia E Phelps
- Department of Integrative Biology and Physiology, and Brain Research Institute, University of California-Los Angeles, Los Angeles, California 90095
| |
Collapse
|
40
|
Luchetti CG, Bevacqua RJ, Lorenzo MS, Tello MF, Willis M, Buemo CP, Lombardo DM, Salamone DF. Vesicles Cytoplasmic Injection: An Efficient Technique to Produce Porcine Transgene-Expressing Embryos. Reprod Domest Anim 2016; 51:501-8. [PMID: 27260090 DOI: 10.1111/rda.12708] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Accepted: 04/14/2016] [Indexed: 11/30/2022]
Abstract
The use of vesicles co-incubated with plasmids showed to improve the efficiency of cytoplasmic injection of transgenes in cattle. Here, this technique was tested as a simplified alternative for transgenes delivery in porcine zygotes. To this aim, cytoplasmic injection of the plasmid alone was compared to the injection with plasmids co-incubated with vesicles both in diploid parthenogenic and IVF zygotes. The plasmid pcx-egfp was injected circular (CP) at 3, 30 and 300 ng/μl and linear (LP) at 30 ng/μl. The experimental groups using parthenogenetic zygotes were as follows: CP naked at 3 ng/μl (N = 105), 30 ng/μl (N = 95) and 300 ng/μl (N = 65); Sham (N = 105); control not injected (N = 223); LP naked at 30 ng/μl (N = 78); LP vesicles (N = 115) and Sham vesicles (N = 59). For IVF zygotes: LP naked (N = 44) LP vesicles (N = 94), Sham (N = 59) and control (N = 79). Cleavage, blastocyst and GFP+ rates were analysed by Fisher's test (p < 0.05). The parthenogenic CP naked group showed lower cleavage respect to control (p < 0.05). The highest concentration of plasmids to allow development to blastocyst stage was 30 ng/μl. There were no differences in DNA fragmentation between groups. The parthenogenic LP naked group resulted in high GFP rates (46%) and also allowed the production of GFP blastocysts (33%). The cytoplasmic injection with LP vesicles into parthenogenic zygotes allowed 100% GFP blastocysts. Injected IVF showed higher cleavage rates than control (p < 0.05). In IVF zygotes, only the use of vesicles produced GFP blastocysts. The use of vesicles co-incubated with plasmids improves the transgene expression efficiency for cytoplasmic injection in porcine zygotes and constitutes a simple technique for easy delivery of plasmids.
Collapse
Affiliation(s)
- C G Luchetti
- Cátedra de Histología y Embriología, Instituto de Investigación y Tecnología en Reproducción Animal (INITRA), Facultad de Ciencias Veterinarias, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - R J Bevacqua
- Laboratorio de Biotecnología Animal, Facultad de Agronomía, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - M S Lorenzo
- Cátedra de Histología y Embriología, Instituto de Investigación y Tecnología en Reproducción Animal (INITRA), Facultad de Ciencias Veterinarias, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - M F Tello
- Cátedra de Histología y Embriología, Instituto de Investigación y Tecnología en Reproducción Animal (INITRA), Facultad de Ciencias Veterinarias, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - M Willis
- Centro de Estudios Biomedicos, Biotecnologicos, Ambientales y Diagnostico (CEBBAD), Universidad Maimonides, Ciudad Autónoma de Buenos Aires, Argentina
| | - C P Buemo
- Laboratorio de Biotecnología Animal, Facultad de Agronomía, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - D M Lombardo
- Cátedra de Histología y Embriología, Instituto de Investigación y Tecnología en Reproducción Animal (INITRA), Facultad de Ciencias Veterinarias, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - D F Salamone
- Laboratorio de Biotecnología Animal, Facultad de Agronomía, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| |
Collapse
|
41
|
Hochi S. Microtubule assembly crucial to bovine embryonic development in assisted reproductive technologies. Anim Sci J 2016; 87:1076-83. [PMID: 27169525 PMCID: PMC5084824 DOI: 10.1111/asj.12621] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2015] [Revised: 01/05/2016] [Accepted: 01/25/2016] [Indexed: 11/30/2022]
Abstract
Centrosome integrity and microtubule network are crucial to the events around fertilization, including pronuclear development, migration and fusion, and the first mitotic division. The present review highlights the importance of bull spermatozoal centrosomes to function as a microtubule‐organizing center for successful fertilization and the subsequent embryonic development. Spermatozoal centrosomes need to be blended with ooplasmic pericentriolar materials accurately to nucleate and organize the sperm aster. Dysfunction of the spermatozoal centrosomes is associated with fertilization failure, which has been overcome with supplemental stimuli for oocyte activation following intracytoplasmic sperm injection in humans. Even though the spermatozoal centrosomes are functionally intact, abnormal sperm aster formation was frequently observed in vitrified‐warmed bovine oocytes, with delayed pronuclear development and migration. Treatment of the post‐warm oocytes with Rho‐associated coiled‐coil kinase inhibitor or α‐tocopherol inhibited the incidence of the abnormal aster formation, resulting in higher blastocyst yields following in vitro fertilization and culture. Thus, understanding of centrosomal function made it possible to improve the performance of advanced reproductive technologies.
Collapse
Affiliation(s)
- Shinichi Hochi
- Department of Applied Biology, Faculty of Textile Science and Technology, Shinshu University, Nagano, Japan
| |
Collapse
|
42
|
Effect of anisomycin, a protein synthesis inhibitor, on the in vitro developmental potential, ploidy and embryo quality of bovine ICSI embryos. ZYGOTE 2016; 24:724-32. [PMID: 27140503 DOI: 10.1017/s0967199416000034] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Increasing the efficiency of intracytoplasmic sperm injection (ICSI) in domestic animals has been attempted by many researchers, however embryonic development to the blastocyst stage remains low compared with that of in vitro fertilization (IVF) embryos. One of the main problems observed in cattle is inadequate oocyte activation after ICSI. The present study compared the effect of cycloheximide (CHX), 6-dimethylaminopurine (DMAP), and anisomycin (ANY) on the fertilization rate, development, ploidy and quality of bovine embryos generated by ICSI. Although no differences were observed between treatments in terms of cleavage, higher blastocyst rates were observed for ANY (37.3%) compared with CHX (21.8%, P 0.05) treatments. No differences were observed in the quality of embryos as assessed by the total number of cells, their distribution to the different embryo compartments [inner cell mass (ICM) and trophectoderm (TE)], the proportion of ICM cells to the total cell numbers and terminal deoxynucleotidyl transferase dUTP nick end labelling (TUNEL)-positive cells. Similarly, no differences were observed in the normal ploidy of embryos (56, 67, and 55%) for ANY, CHX and DMAP, respectively. However, higher fertilization rates were observed for ANY (75%) and CHX (87%) treatments compared with DMAP (35%). In conclusion, ANY showed a superior developmental rate compared with CHX treatment. Although no significant differences were observed compared with an improved protocol of DMAP (2Io-DMAP), the lower fertilization rate recorded with DMAP strongly suggests that ANY could be a better alternative for oocyte activation than traditional chemical compounds used currently in ICSI.
Collapse
|
43
|
Factors affecting efficiency of introducing foreign DNA and RNA into parthenogenetic or in vitro-fertilized porcine eggs by cytoplasmic microinjection. In Vitro Cell Dev Biol Anim 2016; 52:713-22. [PMID: 27130683 DOI: 10.1007/s11626-016-0025-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Accepted: 04/01/2016] [Indexed: 12/31/2022]
Abstract
Cytoplasmic microinjection (CI) of foreign gene into in vivo fertilized zygotes has emerged as a useful tool for transgenic pig production. In the current study, we investigated factors affecting transgenic efficiency and developmental potential of parthenogenetic (PA) and in vitro-fertilized (IVF) porcine embryos produced by CI. These factors included adding of RNase inhibitor, DNA or RNA concentration, injection time, and different structures of plasmids. Our results showed that adding of 1-4 U/μL of RNase inhibitor did not have negative effect on development potential of CI-PA embryos, and RNase inhibitor injection significantly increased EGFP expressing rate of CI-PA embryos. High injection DNA concentration and long injection interval after PA significantly reduced blastocyst formation. Different molecular structures such as DNA or RNA affected CI-PA embryos development, and RNA had little harmful effect on pig's early embryonic development. EGFP expression rate of CI-IVF embryos was improved following the increase of foreign DNA concentration, but blastocyst formation rate was decreased. Injection time after IVF did not show any significant difference on embryonic development, but longer interval resulted in a significantly lower EGFP expressing rate. Cas9 mRNA and myostatin (GDF-8) sgRNA co-injection indicated that the mutation rate of CI-IVF group was significantly higher than that of CI-PA. The CI-IVF-generated embryos were then transferred to six recipient pigs, but no live piglets were obtained. The following pronuclear formation assessment showed more than 76.1% IVF zygotes were polyspermy. These results demonstrate that CI-PA and CI-IVF were effective methods for production of transgenic pig embryos. However, polyspermic fertilization and poor quality of porcine IVF blastocysts are still the main problem of resulting in pregnancy failure.
Collapse
|
44
|
Deng SL, Chen SR, Wang ZP, Zhang Y, Tang JX, Li J, Wang XX, Cheng JM, Jin C, Li XY, Zhang BL, Yu K, Lian ZX, Liu GS, Liu YX. Melatonin promotes development of haploid germ cells from early developing spermatogenic cells of Suffolk sheep under in vitro condition. J Pineal Res 2016; 60:435-47. [PMID: 26993286 DOI: 10.1111/jpi.12327] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Accepted: 03/15/2016] [Indexed: 01/03/2023]
Abstract
Promotion of spermatogonial stem cell (SSC) differentiation into functional sperms under in vitro conditions is a great challenge for reproductive physiologists. In this study, we observed that melatonin (10(-7) M) supplementation significantly enhanced the cultured SSCs differentiation into haploid germ cells. This was confirmed by the expression of sperm special protein, acrosin. The rate of SSCs differentiation into sperm with melatonin supplementation was 11.85 ± 0.93% which was twofold higher than that in the control. The level of testosterone, the transcriptions of luteinizing hormone receptor (LHR), and the steroidogenic acute regulatory protein (StAR) were upregulated with melatonin treatment. At the early stage of SSCs culture, melatonin suppressed the level of cAMP, while at the later stage, it promoted cAMP production. The similar pattern was observed in testosterone content. Expressions for marker genes of meiosis anaphase, Dnmt3a, and Bcl-2 were upregulated by melatonin. In contrast, Bax expression was downregulated. Importantly, the in vitro-generated sperms were functional and they were capable to fertilize oocytes. These fertilized oocytes have successfully developed to the blastula stage.
Collapse
Affiliation(s)
- Shou-Long Deng
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Su-Ren Chen
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Zhi-Peng Wang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Yan Zhang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Ji-Xin Tang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Jian Li
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Xiu-Xia Wang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Jin-Mei Cheng
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Cheng Jin
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Xiao-Yu Li
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Bao-Lu Zhang
- National key Lab of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, P.R. China
| | - Kun Yu
- National key Lab of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, P.R. China
| | - Zheng-Xing Lian
- Laboratory of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, P.R. China
| | - Guo-Shi Liu
- Laboratory of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, P.R. China
| | - Yi-Xun Liu
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| |
Collapse
|
45
|
Sato M, Ohtsuka M, Watanabe S, Gurumurthy CB. Nucleic acids delivery methods for genome editing in zygotes and embryos: the old, the new, and the old-new. Biol Direct 2016; 11:16. [PMID: 27037013 PMCID: PMC4815204 DOI: 10.1186/s13062-016-0115-8] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Accepted: 03/15/2016] [Indexed: 12/31/2022] Open
Abstract
In the recent years, sequence-specific nucleases such as ZFNs, TALENs, and CRISPR/Cas9 have revolutionzed the fields of animal genome editing and transgenesis. However, these new techniques require microinjection to deliver nucleic acids into embryos to generate gene-modified animals. Microinjection is a delicate procedure that requires sophisticated equipment and highly trained and experienced technicians. Though over a dozen alternate approaches for nucleic acid delivery into embryos were attempted during the pre-CRISPR era, none of them became routinely used as microinjection. The addition of CRISPR/Cas9 to the genome editing toolbox has propelled the search for novel delivery approaches that can obviate the need for microinjection. Indeed, some groups have recently developed electroporation-based methods that have the potential to radically change animal transgenesis. This review provides an overview of the old and new delivery methods, and discusses various strategies that were attempted during the last three decades. In addition, several of the methods are re-evaluated with respect to their suitability to deliver genome editing components, particularly CRISPR/Cas9, to embryos.
Collapse
Affiliation(s)
- Masahiro Sato
- Section of Gene Expression Regulation, Frontier Science Research Center, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima, Kagoshima, 890-8544 Japan
| | - Masato Ohtsuka
- Division of Basic Molecular Science and Molecular Medicine, School of Medicine, Tokai University, Kanagawa, 259 1193 Japan
| | - Satoshi Watanabe
- Animal Genome Research Unit, Division of Animal Science, National Institute of Agrobiological Sciences, Ibaraki, 305-8602 Japan
| | - Channabasavaiah B. Gurumurthy
- Developmental Neuroscience, Munroe-Meyer Institute, University of Nebraska Medical Center, Omaha, NE 68198 USA
- Mouse Genome Engineering Core Facility, University of Nebraska Medical Center, Omaha, NE 68198 USA
| |
Collapse
|
46
|
Nakao H, Harada T, Nakao K, Kiyonari H, Inoue K, Furuta Y, Aiba A. A possible aid in targeted insertion of large DNA elements by CRISPR/Cas in mouse zygotes. Genesis 2016; 54:65-77. [PMID: 26713866 DOI: 10.1002/dvg.22914] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Accepted: 12/21/2015] [Indexed: 01/08/2023]
Abstract
The CRISPR/Cas system has rapidly emerged recently as a new tool for genome engineering, and is expected to allow for controlled manipulation of specific genomic elements in a variety of species. A number of recent studies have reported the use of CRISPR/Cas for gene disruption (knockout) or targeted insertion of foreign DNA elements (knock-in). Despite the ease of simple gene knockout and small insertions or nucleotide substitutions in mouse zygotes by the CRISPR/Cas system, targeted insertion of large DNA elements remains an apparent challenge. Here the generation of knock-in mice with successful targeted insertion of large donor DNA elements ranged from 3.0 to 7.1 kb at the ROSA26 locus using the CRISPR/Cas system was achieved. Multiple independent knock-in founder mice were obtained by injection of hCas9 mRNA/sgRNA/donor vector mixtures into the cytoplasm of C57BL/6N zygotes when the injected zygotes were treated with an inhibitor of actin polymerization, cytochalasin. Successful germ line transmission of three of these knock-in alleles was also confirmed. The results suggested that treatment of zygotes with actin polymerization inhibitors following microinjection could be a viable method to facilitate targeted insertion of large DNA elements by the CRISPR/Cas system, enabling targeted knock-in readily attainable in zygotes.
Collapse
Affiliation(s)
- Harumi Nakao
- Laboratory of Animal Resources, Center for Disease Biology and Integrative Medicine, Faculty of Medicine, The University of Tokyo, Bunkyo-Ku, Tokyo, 113-0033, Japan
| | - Takeshi Harada
- Laboratory of Animal Resources, Center for Disease Biology and Integrative Medicine, Faculty of Medicine, The University of Tokyo, Bunkyo-Ku, Tokyo, 113-0033, Japan
| | - Kazuki Nakao
- Laboratory of Animal Resources, Center for Disease Biology and Integrative Medicine, Faculty of Medicine, The University of Tokyo, Bunkyo-Ku, Tokyo, 113-0033, Japan.,Animal Resource Development Unit, Division of Bio-Function Dynamics Imaging, RIKEN Center for Life Science Technologies, Kobe, Hyogo, 650-0047, Japan
| | - Hiroshi Kiyonari
- Animal Resource Development Unit, Division of Bio-Function Dynamics Imaging, RIKEN Center for Life Science Technologies, Kobe, Hyogo, 650-0047, Japan.,Genetic Engineering Team, Division of Bio-Function Dynamics Imaging, RIKEN Center for Life Science Technologies, Kobe, Hyogo, 650-0047, Japan
| | - Kenichi Inoue
- Animal Resource Development Unit, Division of Bio-Function Dynamics Imaging, RIKEN Center for Life Science Technologies, Kobe, Hyogo, 650-0047, Japan
| | - Yasuhide Furuta
- Animal Resource Development Unit, Division of Bio-Function Dynamics Imaging, RIKEN Center for Life Science Technologies, Kobe, Hyogo, 650-0047, Japan.,Genetic Engineering Team, Division of Bio-Function Dynamics Imaging, RIKEN Center for Life Science Technologies, Kobe, Hyogo, 650-0047, Japan
| | - Atsu Aiba
- Laboratory of Animal Resources, Center for Disease Biology and Integrative Medicine, Faculty of Medicine, The University of Tokyo, Bunkyo-Ku, Tokyo, 113-0033, Japan
| |
Collapse
|
47
|
Kang KS, Park TS, Rengaraj D, Lee HC, Lee HJ, Choi HJ, Mizushima S, Ono T, Han JY. Fertilisation of cryopreserved sperm and unfertilised quail ovum by intracytoplasmic sperm injection. Reprod Fertil Dev 2016; 28:1974-1981. [DOI: 10.1071/rd15126] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Accepted: 06/02/2015] [Indexed: 11/23/2022] Open
Abstract
Intracytoplasmic sperm injection (ICSI) is an important technique in animal biotechnology for animal cloning and conservation of genetic resources, but has been a challenge for avian species. In the present study, we investigated the ability of cryopreserved quail spermatozoa to achieve fertilisation and embryo development. Female quail were killed 70–120 min after previous oviposition to collect unfertilised oocytes from the oviduct. Fresh or cryopreserved–thawed spermatozoa were injected into the cytoplasm of unfertilised oocytes, and the manipulated oocytes were incubated in quail surrogate eggshells. Injection of fresh spermatozoa supplemented with inositol 1,4,5-trisphosphate (IP3) resulted in a significantly increased rate of embryo development compared with injection of fresh spermatozoa alone (90% vs 13%, respectively). Although >80% of embryos stopped cell division and development before Hamburger and Hamilton (HH) Stage 3, approximately 15% of embryos from the fresh sperm injection developed to past HH Stage 4, and one embryo survived up to HH Stage 39 (11 days of incubation). In the case of cryopreserved spermatozoa, the embryo development rate was 30% after ICSI, and this increased significantly to 74% with IP3 supplementation. In conclusion, cryopreserved spermatozoa combined with ICSI followed by surrogate eggshell culture can develop quail embryos.
Collapse
|
48
|
Garrels W, Talluri TR, Ziegler M, Most I, Forcato DO, Schmeer M, Schleef M, Ivics Z, Kues WA. Cytoplasmic injection of murine zygotes with Sleeping Beauty transposon plasmids and minicircles results in the efficient generation of germline transgenic mice. Biotechnol J 2015; 11:178-84. [PMID: 26470758 DOI: 10.1002/biot.201500218] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Revised: 08/27/2015] [Accepted: 10/07/2015] [Indexed: 12/22/2022]
Abstract
Transgenesis in the mouse is an essential tool for the understanding of gene function and genome organization. Here, we describe a simplified microinjection protocol for efficient germline transgenesis and sustained transgene expression in the mouse model employing binary Sleeping Beauty transposon constructs of different topology. The protocol is based on co-injection of supercoiled plasmids or minicircles, encoding the Sleeping Beauty transposase and a transposon construct, into the cytoplasm of murine zygotes. Importantly, this simplified injection avoids the mechanical penetration of the vulnerable pronuclear membrane, resulting in higher survival rates of treated embryos and a more rapid pace of injections. Upon translation of the transposase, transposase-catalyzed transposition into the genome results in stable transgenic animals carrying monomeric transgenes. In summary, cytoplasmic injection of binary transposon constructs is a feasible, plasmid-based, and simplified microinjection method to generate genetically modified mice. The modular design of the components allows the multiplexing of different transposons, and the generation of multi-transposon transgenic mice in a single step.
Collapse
Affiliation(s)
- Wiebke Garrels
- Institut für Nutztiergenetik, Friedrich-Loeffler-Institut, Neustadt am Rübenberge, Germany
| | - Thirumala R Talluri
- Institut für Nutztiergenetik, Friedrich-Loeffler-Institut, Neustadt am Rübenberge, Germany
| | - Maren Ziegler
- Institut für Nutztiergenetik, Friedrich-Loeffler-Institut, Neustadt am Rübenberge, Germany
| | - Ilka Most
- Institut für Nutztiergenetik, Friedrich-Loeffler-Institut, Neustadt am Rübenberge, Germany
| | - Diego O Forcato
- Institut für Nutztiergenetik, Friedrich-Loeffler-Institut, Neustadt am Rübenberge, Germany.,Departamento de Biología Molecular, Universidad Nacional de Río Cuarto, Río Cuarto, Córdoba, Argentina
| | | | - Martin Schleef
- Institut für Nutztiergenetik, Friedrich-Loeffler-Institut, Neustadt am Rübenberge, Germany.,Plasmid Factory GmbH KG, Bielefeld, Germany
| | - Zoltán Ivics
- Division of Medical Biotechnology, Paul-Ehrlich-Institute, Langen, Germany
| | - Wilfried A Kues
- Institut für Nutztiergenetik, Friedrich-Loeffler-Institut, Neustadt am Rübenberge, Germany.
| |
Collapse
|
49
|
Moreira P, Pérez-Cerezales S, Laguna R, Fernández-Gonzalez R, Sanjuanbenito BP, Gutiérrez-Adán A. Transgenic mouse offspring generated by ROSI. J Reprod Dev 2015; 62:37-42. [PMID: 26498042 PMCID: PMC4768777 DOI: 10.1262/jrd.2015-105] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
The production of transgenic animals is an important tool for experimental and applied biology. Over the
years, many approaches for the production of transgenic animals have been tried, including pronuclear
microinjection, sperm-mediated gene transfer, transfection of male germ cells, somatic cell nuclear transfer
and the use of lentiviral vectors. In the present study, we developed a new transgene delivery approach, and
we report for the first time the production of transgenic animals by co-injection of DNA and round spermatid
nuclei into non-fertilized mouse oocytes (ROSI). The transgene used was a construct containing the human CMV
immediate early promoter and the enhanced GFP gene. With this procedure, 12% of the live offspring we obtained
carried the transgene. This efficiency of transgenic production by ROSI was similar to the efficiency by
pronuclear injection or intracytoplasmic injection of male gamete nuclei (ICSI). However, ICSI required fewer
embryos to produce the same number of transgenic animals. The expression of Egfp mRNA and
fluorescence of EGFP were found in the majority of the organs examined in 4 transgenic lines generated by
ROSI. Tissue morphology and transgene expression were not distinguishable between transgenic animals produced
by ROSI or pronuclear injection. Furthermore, our results are of particular interest because they indicate
that the transgene incorporation mediated by intracytoplasmic injection of male gamete nuclei is not an
exclusive property of mature sperm cell nuclei with compact chromatin but it can be accomplished with immature
sperm cell nuclei with decondensed chromatin as well. The present study also provides alternative procedures
for transgene delivery into embryos or reconstituted oocytes.
Collapse
Affiliation(s)
- Pedro Moreira
- Departamento de Reproducción Animal, INIA, Madrid 28040, Spain
| | | | | | | | | | | |
Collapse
|
50
|
Pretreating porcine sperm with lipase enhances developmental competence of embryos produced by intracytoplasmic sperm injection. ZYGOTE 2015; 24:594-602. [DOI: 10.1017/s096719941500057x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
SummaryIntracytoplasmic sperm injection (ICSI) has been widely applied in humans, mice, and some domestic animals to cure human infertility, or produce genetically superior or genetically engineered animals. However, the production efficiency of ICSI in pigs remains quite low. In this study, we developed a new sperm pretreatment method to improve production efficiency of ICSI in pigs. Experiment 1 revealed that pretreating porcine sperm with 2.5 mg/ml lipase before ICSI operation, not only can reduce the adhesion between sperm and the injection pipette without adding polyvinylpyrrolidone (PVP) in the operating medium, but also significantly improve male pronuclei (MPN) formation rate (55.56% vs. 40.00% (0 mg/ml), 42.59% (5.0 mg/ml), 40.00% (10.0 mg/ml), P < 0.05) and enhance developmental competence of ICSI embryos (26.03% vs. 10.87% (0 mg/ml), 10.00% (5.0 mg/ml), 10.13% (10.0 mg/ml), P < 0.05). Experiment 2 showed that this method has a higher MPN formation rate (50.47% vs. 30.78%, P < 0.05) and blastocyst rate (18.81% vs. 7.41%, P < 0.05) than the PVP method, and was better than the Triton X-100 treatment method (50.47% vs. 46.23%, 18.81% vs. 12.75%). Therefore, pretreating porcine sperm with 2.5 mg/ml lipase before ICSI operation is highly recommended, instead of adding PVP in the operating medium.
Collapse
|