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Liu Y, Stott R, Regouski M, Fan Z, Perisse IV, Patrick T, Keim J, Meng Q, Polejaeva IA. A retrospective analysis of sheep generated by somatic cell nuclear transfer. Theriogenology 2024; 227:102-111. [PMID: 39047406 DOI: 10.1016/j.theriogenology.2024.07.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Revised: 07/17/2024] [Accepted: 07/18/2024] [Indexed: 07/27/2024]
Abstract
Somatic cell nuclear transfer (SCNT) is one of the primary methods for production of genetically engineered sheep, which allows for gene editing or transgene introduction in somatic cells. The use of SCNT eliminates the risk of genetic mosaicism in embryos and animals that is commonly observed after zygote micromanipulations. This retrospective analysis of SCNT in sheep performed at Utah State University, spanning from 2016 to 2021, examined parameters that may impact pregnancy and full-term development, including donor oocytes (donor age), donor cell lines, SCNT parameters (time of oocyte activation following SCNT, number of transferred embryos, in vitro maturation and culture conditions), and recipients (surgical number and ovulatory status), as well as factors that may correlate with large offspring syndrome or abnormal offspring syndrome (LOS/AOS) in the fetuses and lambs. Our findings indicated that compared to prepubertal oocytes, the SCNT embryos produced from adult sheep oocytes had comparable in vitro maturation rates, pregnancy and full-term development rates, as well as SCNT efficiency. In addition, earlier activation time of SCNT embryos (e.g. 24-26 h post maturation) was correlated to the early pregnancy loss rate, full-term rate, and SCNT efficiency. Compared to our standard serum-containing medium, commercial serum-free culture medium showed a positive correlation with the full-term development of sheep SCNT embryos. Transferring 15-30 embryos per recipient resulted in consistently good pregnancy rates. Surgical numbers and ovulatory status (having at least one follicle between 6 and 12 mm in size or a corpus hemorrhagicum (CH)) of recipients did not affect pregnancy and full-term development rates. In summary, this retrospective analysis identified parameters for improving pregnancy and full-term development of SCNT embryos in sheep.
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Affiliation(s)
- Ying Liu
- Department of Animal, Dairy and Veterinary Sciences, Utah State University, Logan, UT, USA.
| | - Rusty Stott
- Department of Animal, Dairy and Veterinary Sciences, Utah State University, Logan, UT, USA
| | - Misha Regouski
- Department of Animal, Dairy and Veterinary Sciences, Utah State University, Logan, UT, USA
| | - Zhiqiang Fan
- Department of Animal, Dairy and Veterinary Sciences, Utah State University, Logan, UT, USA
| | - Iuri Viotti Perisse
- Department of Animal, Dairy and Veterinary Sciences, Utah State University, Logan, UT, USA
| | - Tayler Patrick
- Department of Animal, Dairy and Veterinary Sciences, Utah State University, Logan, UT, USA
| | - Jacob Keim
- Department of Animal, Dairy and Veterinary Sciences, Utah State University, Logan, UT, USA
| | - Qinggang Meng
- Department of Animal, Dairy and Veterinary Sciences, Utah State University, Logan, UT, USA
| | - Irina A Polejaeva
- Department of Animal, Dairy and Veterinary Sciences, Utah State University, Logan, UT, USA.
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2
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A genetically modified minipig model for Alzheimer’s disease with SORL1 haploinsufficiency. Cell Rep Med 2022; 3:100740. [PMID: 36099918 PMCID: PMC9512670 DOI: 10.1016/j.xcrm.2022.100740] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 04/20/2022] [Accepted: 08/19/2022] [Indexed: 11/21/2022]
Abstract
The established causal genes in Alzheimer’s disease (AD), APP, PSEN1, and PSEN2, are functionally characterized using biomarkers, capturing an in vivo profile reflecting the disease’s initial preclinical phase. Mutations in SORL1, encoding the endosome recycling receptor SORLA, are found in 2%–3% of individuals with early-onset AD, and SORL1 haploinsufficiency appears to be causal for AD. To test whether SORL1 can function as an AD causal gene, we use CRISPR-Cas9-based gene editing to develop a model of SORL1 haploinsufficiency in Göttingen minipigs, taking advantage of porcine models for biomarker investigations. SORL1 haploinsufficiency in young adult minipigs is found to phenocopy the preclinical in vivo profile of AD observed with APP, PSEN1, and PSEN2, resulting in elevated levels of β-amyloid (Aβ) and tau preceding amyloid plaque formation and neurodegeneration, as observed in humans. Our study provides functional support for the theory that SORL1 haploinsufficiency leads to endosome cytopathology with biofluid hallmarks of autosomal dominant AD. Minipig model of Alzheimer’s disease by CRISPR knockout of the causal gene SORL1 Young SORL1 het minipigs phenocopy a preclinical CSF biomarker profile of individuals with AD SORL1 haploinsufficiency causes enlarged endosomes similar to neuronal AD pathology A minipig model bridging the translational gap between AD mouse models and affected individuals
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3
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Dorado B, Pløen GG, Barettino A, Macías A, Gonzalo P, Andrés-Manzano MJ, González-Gómez C, Galán-Arriola C, Alfonso JM, Lobo M, López-Martín GJ, Molina A, Sánchez-Sánchez R, Gadea J, Sánchez-González J, Liu Y, Callesen H, Filgueiras-Rama D, Ibáñez B, Sørensen CB, Andrés V. Generation and characterization of a novel knockin minipig model of Hutchinson-Gilford progeria syndrome. Cell Discov 2019; 5:16. [PMID: 30911407 PMCID: PMC6423020 DOI: 10.1038/s41421-019-0084-z] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 01/15/2019] [Accepted: 01/22/2019] [Indexed: 01/22/2023] Open
Abstract
Hutchinson-Gilford progeria syndrome (HGPS) is an extremely rare genetic disorder for which no cure exists. The disease is characterized by premature aging and inevitable death in adolescence due to cardiovascular complications. Most HGPS patients carry a heterozygous de novo LMNA c.1824C > T mutation, which provokes the expression of a dominant-negative mutant protein called progerin. Therapies proven effective in HGPS-like mouse models have yielded only modest benefit in HGPS clinical trials. To overcome the gap between HGPS mouse models and patients, we have generated by CRISPR-Cas9 gene editing the first large animal model for HGPS, a knockin heterozygous LMNA c.1824C > T Yucatan minipig. Like HGPS patients, HGPS minipigs endogenously co-express progerin and normal lamin A/C, and exhibit severe growth retardation, lipodystrophy, skin and bone alterations, cardiovascular disease, and die around puberty. Remarkably, the HGPS minipigs recapitulate critical cardiovascular alterations seen in patients, such as left ventricular diastolic dysfunction, altered cardiac electrical activity, and loss of vascular smooth muscle cells. Our analysis also revealed reduced myocardial perfusion due to microvascular damage and myocardial interstitial fibrosis, previously undescribed readouts potentially useful for monitoring disease progression in patients. The HGPS minipigs provide an appropriate preclinical model in which to test human-size interventional devices and optimize candidate therapies before advancing to clinical trials, thus accelerating the development of effective applications for HGPS patients.
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Affiliation(s)
- Beatriz Dorado
- 1Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain.,CIBER en Enfermedades Cardiovasculares (CIBER-CV), Madrid, Spain
| | - Gro Grunnet Pløen
- 3Department of Clinical Medicine, Aarhus University, 8200 Aarhus, Denmark.,4Department of Cardiology, Aarhus University Hospital, 8200 Aarhus, Denmark
| | - Ana Barettino
- 1Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain.,CIBER en Enfermedades Cardiovasculares (CIBER-CV), Madrid, Spain
| | - Alvaro Macías
- 1Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain
| | - Pilar Gonzalo
- 1Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain.,CIBER en Enfermedades Cardiovasculares (CIBER-CV), Madrid, Spain
| | - María Jesús Andrés-Manzano
- 1Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain.,CIBER en Enfermedades Cardiovasculares (CIBER-CV), Madrid, Spain
| | - Cristina González-Gómez
- 1Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain.,CIBER en Enfermedades Cardiovasculares (CIBER-CV), Madrid, Spain
| | - Carlos Galán-Arriola
- 1Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain.,CIBER en Enfermedades Cardiovasculares (CIBER-CV), Madrid, Spain
| | - José Manuel Alfonso
- 1Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain
| | - Manuel Lobo
- 1Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain.,CIBER en Enfermedades Cardiovasculares (CIBER-CV), Madrid, Spain
| | | | - Antonio Molina
- 1Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain
| | - Raúl Sánchez-Sánchez
- 5Laboratory of Physiology and Biotechnology of Reproduction in Swine, INIA (Spanish National Institute for Agricultural and Food Research and Technology), Madrid, Spain
| | - Joaquín Gadea
- 6Department of Physiology, University of Murcia and IMIB-Arrixaca, 30100 Murcia, Spain
| | | | - Ying Liu
- 8Department of Animal Science, Aarhus University, 8830 Tjele, Denmark
| | - Henrik Callesen
- 8Department of Animal Science, Aarhus University, 8830 Tjele, Denmark
| | - David Filgueiras-Rama
- 1Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain.,CIBER en Enfermedades Cardiovasculares (CIBER-CV), Madrid, Spain.,9Department of Cardiology, Cardiac Electrophysiology Unit, Hospital Clínico San Carlos, Madrid, Spain
| | - Borja Ibáñez
- 1Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain.,CIBER en Enfermedades Cardiovasculares (CIBER-CV), Madrid, Spain.,10Department of Cardiology, Instituto de Investigación Sanitaria-Fundación Jiménez Díaz Hospital, Madrid, Spain
| | - Charlotte Brandt Sørensen
- 3Department of Clinical Medicine, Aarhus University, 8200 Aarhus, Denmark.,4Department of Cardiology, Aarhus University Hospital, 8200 Aarhus, Denmark
| | - Vicente Andrés
- 1Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain.,CIBER en Enfermedades Cardiovasculares (CIBER-CV), Madrid, Spain
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Liu C, Liu Y, Larsen K, Hou YP, Callesen H. Calcium-sensing receptor (CASR) is involved in porcine in vitro fertilisation and early embryo development. Reprod Fertil Dev 2018; 30:391-398. [PMID: 28712411 DOI: 10.1071/rd16338] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2016] [Accepted: 06/25/2017] [Indexed: 11/23/2022] Open
Abstract
It has been demonstrated that extracellular calcium is necessary in fertilisation and embryo development but the mechanism is still not well understood. The present study mainly focussed on the extracellular calcium effector called the calcium-sensing receptor (CASR) and examined its expression in porcine gametes and embryos and its function during fertilisation and early embryo development. By using reverse transcription polymerase chain reaction, CASR was found to be expressed in porcine oocytes, spermatozoa and embryos at different developmental stages. Functionally, medium supplementation with a CASR agonist or an antagonist during in vitro fertilisation (IVF) and in vitro culture (IVC) was tested. During fertilisation, the presence of a CASR agonist increased sperm penetration rate and decreased polyspermy rate leading to an increased normal fertilisation rate. During embryo development, for the IVF embryos, agonist treatment during IVC significantly increased cleavage rate and blastocyst formation rate compared with the control group. Furthermore, parthenogenetically activated embryos showed similar results with lower cleavage and blastocyst formation rates in the antagonist group than in the other groups. It was concluded that CASR, as the effector of extracellular calcium, modulates porcine fertilisation and early embryo development.
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Affiliation(s)
- C Liu
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, No. 2, Yuanmingyuan West Road, Haidian District, Beijing 100193, China
| | - Y Liu
- Department of Animal Science, Aarhus University, Blichers Allé 20, DK-8830 Tjele, Denmark
| | - K Larsen
- Department of Molecular Biology and Genetics, Aarhus University, Blichers Allé 20, DK-8830 Tjele, Denmark
| | - Y P Hou
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, No. 2, Yuanmingyuan West Road, Haidian District, Beijing 100193, China
| | - H Callesen
- Department of Animal Science, Aarhus University, Blichers Allé 20, DK-8830 Tjele, Denmark
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5
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Pedersen HS, Callesen H, Løvendahl P, Chen F, Nyengaard JR, Nikolaisen NK, Holm P, Hyttel P. Ultrastructure and mitochondrial numbers in pre- and postpubertal pig oocytes. Reprod Fertil Dev 2017; 28:586-98. [PMID: 25482576 DOI: 10.1071/rd14220] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Accepted: 08/19/2014] [Indexed: 11/23/2022] Open
Abstract
Prepubertal pig oocytes are associated with lower developmental competence. The aim of this experiment was to conduct an exhaustive survey of oocyte ultrastructure and to use a design-unbiased stereological approach to quantify the numerical density and total number of mitochondria in oocytes with different diameters from pre- and postpubertal pigs. The ultrastructure of smaller prepubertal immature oocytes indicated active cells in close contact with cumulus cells. The postpubertal oocytes were more quiescent cell types. The small prepubertal oocytes had a lower total mitochondrial number, but no differences were observed in mitochondrial densities between groups. Mature postpubertal oocytes adhered to the following characteristics: presence of metaphase II, lack of contact between cumulus cells and oocyte, absence of rough endoplasmic reticulum and Golgi complexes, peripheral location of cortical granules and central localisation of mitochondria, vesicles and lipid droplets. Prepubertal oocytes displayed more variation. The ultrastructure of large pre- and postpubertal oocytes was compatible with higher developmental competence, whereas that of smaller prepubertal oocytes could explain their reduced capacity. The higher number of mitochondria in large pre- and postpubertal oocytes could have an influence on oocyte competence, by increasing the pool of mitochondria available for early embryonic development.
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Affiliation(s)
| | - Henrik Callesen
- Department of Animal Science, Aarhus University, Blichers Allé 20, DK-8830 Tjele, Denmark
| | - Peter Løvendahl
- Department of Molecular Biology and Genetics, Aarhus University, Blichers Allé 20, DK-8830 Tjele, Denmark
| | - Fenghua Chen
- Stereology and Electron Microscopy Laboratory, Centre for Stochastic Geometry and Advanced Bioimaging, Aarhus University, Nørrebrogade 44, DK-8000 Aarhus C, Denmark
| | - Jens Randel Nyengaard
- Stereology and Electron Microscopy Laboratory, Centre for Stochastic Geometry and Advanced Bioimaging, Aarhus University, Nørrebrogade 44, DK-8000 Aarhus C, Denmark
| | - Nanett Kvist Nikolaisen
- Department of Veterinary Clinical and Animal Science, University of Copenhagen, Dyrlægevej 16, DK-1870 Frederiksberg C, Denmark
| | - Peter Holm
- Department of Veterinary Clinical and Animal Science, University of Copenhagen, Dyrlægevej 16, DK-1870 Frederiksberg C, Denmark
| | - Poul Hyttel
- Department of Veterinary Clinical and Animal Science, University of Copenhagen, Dyrlægevej 16, DK-1870 Frederiksberg C, Denmark
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6
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Grupen CG. The evolution of porcine embryo in vitro production. Theriogenology 2014; 81:24-37. [PMID: 24274407 DOI: 10.1016/j.theriogenology.2013.09.022] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Revised: 09/14/2013] [Accepted: 09/14/2013] [Indexed: 12/23/2022]
Abstract
The in vitro production of porcine embryos has presented numerous challenges to researchers over the past four decades. Some of the problems encountered were specific to porcine gametes and embryos and needed the concerted efforts of many to overcome. Gradually, porcine embryo in vitro production systems became more reliable and acceptable rates of blastocyst formation were achieved. Despite the significant improvements, the problem of polyspermic fertilization has still not been adequately resolved and the embryo in vitro culture conditions are still considered to be suboptimal. Whereas early studies focused on increasing our understanding of the reproductive processes involved, the technology evolved to the point where in vitro-matured oocytes and in vitro-produced embryos could be used as research material for developing associated reproductive technologies, such as SCNT and embryo cryopreservation. Today, the in vitro procedures used to mature oocytes and culture embryos are integral to the production of transgenic pigs by SCNT. This review discusses the major achievements, advances, and knowledge gained from porcine embryo in vitro production studies and highlights the future research perspectives of this important technology.
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Affiliation(s)
- Christopher G Grupen
- Faculty of Veterinary Science, The University of Sydney, Camden, New South Wales, Australia.
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Østrup O, Olbricht G, Østrup E, Hyttel P, Collas P, Cabot R. RNA profiles of porcine embryos during genome activation reveal complex metabolic switch sensitive to in vitro conditions. PLoS One 2013; 8:e61547. [PMID: 23637850 PMCID: PMC3639270 DOI: 10.1371/journal.pone.0061547] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2012] [Accepted: 03/11/2013] [Indexed: 11/18/2022] Open
Abstract
Fertilization is followed by complex changes in cytoplasmic composition and extensive chromatin reprogramming which results in the abundant activation of totipotent embryonic genome at embryonic genome activation (EGA). While chromatin reprogramming has been widely studied in several species, only a handful of reports characterize changing transcriptome profiles and resulting metabolic changes in cleavage stage embryos. The aims of the current study were to investigate RNA profiles of in vivo developed (ivv) and in vitro produced (ivt) porcine embryos before (2-cell stage) and after (late 4-cell stage) EGA and determine major metabolic changes that regulate totipotency. The period before EGA was dominated by transcripts responsible for cell cycle regulation, mitosis, RNA translation and processing (including ribosomal machinery), protein catabolism, and chromatin remodelling. Following EGA an increase in the abundance of transcripts involved in transcription, translation, DNA metabolism, histone and chromatin modification, as well as protein catabolism was detected. The further analysis of members of overlapping GO terms revealed that despite that comparable cellular processes are taking place before and after EGA (RNA splicing, protein catabolism), different metabolic pathways are involved. This strongly suggests that a complex metabolic switch accompanies EGA. In vitro conditions significantly altered RNA profiles before EGA, and the character of these changes indicates that they originate from oocyte and are imposed either before oocyte aspiration or during in vitro maturation. IVT embryos have altered content of apoptotic factors, cell cycle regulation factors and spindle components, and transcription factors, which all may contribute to reduced developmental competence of embryos produced in vitro. Overall, our data are in good accordance with previously published, genome-wide profiling data in other species. Moreover, comparison with mouse and human embryos showed striking overlap in functional annotation of transcripts during the EGA, suggesting conserved basic mechanisms regulating establishment of totipotency in mammalian development.
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Affiliation(s)
- Olga Østrup
- Institute for Basic Medical Sciences, Faculty of Medicine, University of Oslo and Norwegian Center for Stem Cell Research, Oslo, Norway.
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