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Bhat RA, Rafi H, Tardiolo G, Fazio F, Aragona F, Zumbo A, Coelho C, D'Alessandro E. The role of embryonic stem cells, transcription and growth factors in mammals: A review. Tissue Cell 2023; 80:102002. [PMID: 36549226 DOI: 10.1016/j.tice.2022.102002] [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: 04/06/2022] [Revised: 11/07/2022] [Accepted: 12/14/2022] [Indexed: 12/23/2022]
Abstract
Mammals represent a relevant species in worldwide cultures with significant commercial value. These animals are considered an attractive large animal model for biomedical and biotechnology research. The development of large animal experimental models may open alternative strategies for investigating stem cells (SCs) physiology and potential application in the veterinary field. The embryonic stem cells (ESCs) are known to possess natural pluripotency that confers the ability to differentiate into various tissues in vivo and in vitro. These notable characteristics can be useful for research and innovative applications, including biomedicine, agriculture and industry. Transcription factors play a crucial role in preserving stem cell self-renewal, whereas growth factors are involved in both growth and differentiation. However, to date, many questions concerning pluripotency, cellular differentiation regulator genes, and other molecules such as growth factors and their interactions in many mammalian species remain unresolved. The purpose of this review is to provide an overall review regarding the study of ESCs in mammals and briefly discuss the role of transcription and growth factors.
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Affiliation(s)
- Rayees Ahmad Bhat
- Department of Zoology, Kurukshetra University, Kurukshetra 136119, India
| | - Humera Rafi
- Department of Chemistry, University of Gujrat, Pakistan
| | - Giuseppe Tardiolo
- Department of Veterinary Sciences, University of Messina, Via Palatucci snc, Messina 98168, Italy
| | - Francesco Fazio
- Department of Veterinary Sciences, University of Messina, Via Palatucci snc, Messina 98168, Italy.
| | - Francesca Aragona
- Department of Veterinary Sciences, University of Messina, Via Palatucci snc, Messina 98168, Italy
| | - Alessandro Zumbo
- Department of Veterinary Sciences, University of Messina, Via Palatucci snc, Messina 98168, Italy
| | - Clarisse Coelho
- Faculdade de Medicina Veterinária, Universidade Lusófona de Humanidades e Tecnologias (ULHT), Campo Grande 376, Lisboa 1749-024, Portugal
| | - Enrico D'Alessandro
- Department of Veterinary Sciences, University of Messina, Via Palatucci snc, Messina 98168, Italy
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Bou G, Guo J, Liu S, Guo S, Davaakhuu G, Lv Q, Xue B, Qiao S, Lv J, Weng X, Zhao J, Zhang Y, He Y, Zhang H, Chai Z, Liu Y, Yu Y, Qu B, Sun R, Shen X, Lei L, Liu Z. OCT4 expression transactivated by GATA protein is essential for non-rodent trophectoderm early development. Cell Rep 2022; 41:111644. [DOI: 10.1016/j.celrep.2022.111644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 07/26/2022] [Accepted: 10/20/2022] [Indexed: 11/23/2022] Open
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Characterization of nanog in Nile tilapia (Oreochromis niloticus) and its spatiotemporal expression patterns during embryonic and gonadal development. Comp Biochem Physiol B Biochem Mol Biol 2022; 259:110718. [PMID: 35093560 DOI: 10.1016/j.cbpb.2022.110718] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Revised: 01/21/2022] [Accepted: 01/24/2022] [Indexed: 12/13/2022]
Abstract
Nanog is one of the well-characterized core transcription factors in pluripotency maintenance network. So far, studies on fishes indicate that the Nanog expression occurs from embryonic 1-cell stage to blastula stage, and is restricted to the gonadal germline cells in adult tissues, which is strikingly different from that in mammals. However, whether this expression profile is conservative in fishes remains to be investigated. Here Nile tilapia (Oreochromis niloticus) nanog (named as Ong) was identified and its spatiotemporal expression patterns during embryonic and gonadal development were investigated. The Ong cDNA contains an open reading frame of 678 bp, encoding 226 amino acids. The anti-Ong antibody was prepared through prokaryotic protein expression and its specificity was validated. The Ong expression in embryonic 1-cell stage did not appear until the early stage of blastocyst and continued to the late stage of blastocyst. In adult tissues, its expression was limited to gonads. Its expression patterns during gonadal development were further investigated by in situ hybridization and immunohistochemical staining. In testis, Ong was not expressed at 30 dah (days after hatching), but highly expressed in spermatogonia and spermatocytes at 150 dah; in ovaries at 30 and 150 dah, it was not expressed in germline cells but in all somatic cells. This expression profile is strikingly different from reports in fishes to date. Our study firstly indicates that the Nanog expression profile is not conservative in fishes. This study is valuable for further functional and evolutionary study of this gene.
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Zhou D, Huang Z, Zhu X, Hong T, Zhao Y. Combination of endothelial progenitor cells and BB-94 significantly alleviates brain damage in a mouse model of diabetic ischemic stroke. Exp Ther Med 2021; 22:789. [PMID: 34055088 PMCID: PMC8145984 DOI: 10.3892/etm.2021.10221] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Accepted: 04/01/2021] [Indexed: 12/12/2022] Open
Abstract
Ischemic stroke is a complication of chronic macrovascular disease in type 2 diabetes. However, the pathogenesis of diabetic ischemic stroke has not yet been fully clarified. The aim of the present study was to investigate the underlying effects of endothelial progenitor cells (EPCs) and the matrix metalloproteinase inhibitor BB-94 on diabetic stroke. In vitro experiments were performed using oxygen-glucose deprivation/reoxygenation (OGD/R) model cells, established using HT22 mouse hippocampal cells. MTT assays and flow cytometry revealed that BB-94 prominently induced the proliferation of the OGD/R model cells and prevented their apoptosis. When EPCs and BB-94 were applied to the OGD/R model cells in combination, proliferation was further accelerated and oxidative damage was attenuated. In vivo experiments were also performed using a middle cerebral artery occlusion (MCAO) mouse model. The results of modified neurological severity scoring and oxidative stress marker analysis demonstrated that EPCs and BB-94 prominently alleviated cerebral ischemia/reperfusion injury in the MCAO model mice. Furthermore, reverse transcription-quantitative PCR and western blot assays revealed that EPCs in combination with BB-94 significantly downregulated the expression of matrix metalloproteinases (MMPs) and upregulated the expression of tissue inhibitor of metalloproteinases 1 in OGD/R cells and MCAO model mice. The results suggest that EPCs were successfully isolated and identified, and the OGD/R cell and MCAO mouse models were successfully established. They also indicate that EPCs alone or in combination with BB-94 may exert protective effects against ischemic stroke via the reduction of MMP expression.
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Affiliation(s)
- Daixuan Zhou
- Queen Mary College, Nanchang University, Nanchang, Jiangxi 330031, P.R. China
| | - Zhi Huang
- Key Laboratory of Endemic and Ethnic Diseases, Ministry of Education, Guizhou Medical University, Guiyang, Guizhou 550002, P.R. China
| | - Xiaoxi Zhu
- Key Laboratory of Endemic and Ethnic Diseases, Ministry of Education, Guizhou Medical University, Guiyang, Guizhou 550002, P.R. China
| | - Tao Hong
- Department of Neurosurgery, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330029, P.R. China
| | - Yuanli Zhao
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing 100070, P.R. China
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Relative abundance of pluripotency-associated candidate genes in immature oocytes and in vitro-produced buffalo embryos ( Bubalus bubalis). ZYGOTE 2021; 29:459-467. [PMID: 33818346 DOI: 10.1017/s0967199421000101] [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] [Indexed: 02/07/2023]
Abstract
The present study was undertaken to analyze the relative abundance (RA) of pluripotency-associated genes (NANOG, OCT4, SOX2, c-MYC, and FOXD3) in different grades of immature oocytes and various stages of in vitro-produced buffalo embryos using RT-qPCR. Results showed that the RA of NANOG, OCT4, and FOXD3 transcripts was significantly higher (P < 0.05) in A grade oocytes compared with the other grades of oocytes. The RA of the c-MYC transcript was significantly higher (P < 0.05) in A grade compared with the C and D grades of oocytes, but the values did not differ significantly from the B grade of oocytes. The RA of the SOX2 transcript was almost similar in all grades of the oocytes. The expression levels of NANOG (P > 0.05), OCT4 (P > 0.05), c-MYC (P > 0.05) and SOX2 (P < 0.05) were higher in the blastocysts compared with the other stages of the embryos. Markedly, FOXD3 expression was significantly higher (P < 0.05) in 8-16-cell embryos compared with the 2-cell and 4-cell embryos and blastocyst, but did not differ significantly from the morula stage of the embryos. In the study, the majority of pluripotency-associated genes showed higher expression in A grade immature oocytes. Therefore, it is concluded that the A grade oocytes appeared to be more developmental competent and are suitable candidates for nuclear cloning research in buffalo. In buffalo, NANOG, OCT4, SOX2, and c-MYC are highly expressed in blastocysts compared with the other stages of embryos.
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Maia ALRS, Arrais AM, Prellwitz L, Batista RITP, Figueira LM, Correia LFL, Fonseca JF, Souza-Fabjan JMG. Embryo development is impaired in goats that are treated for hydrometra and subsequently subjected to superovulation. Vet Rec 2020; 187:e88. [PMID: 32839201 DOI: 10.1136/vr.105906] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 06/25/2020] [Accepted: 07/07/2020] [Indexed: 01/07/2023]
Abstract
BACKGROUND Reproductive efficiency after hydrometra (HD) treatment is usually unsatisfactory. METHODS To identify mechanisms involved in low reproductive efficiency of HD-treated goats, pluriparous dairy goats treated for HD (n=10, HD) or with no reproductive disorders (n=11, control: CONT) were induced to oestrus and superovulated. Goats were mated with fertile bucks and seven days after oestrus, non-surgical embryo recovery was performed. Embryos were evaluated and gene expression was performed. RESULTS There were no differences (P>0.05) in sexual behaviour parameters, superovulation response, mean number of retrieved structures and viable embryos between groups; although embryo recovery rate was higher (P=0.01) in CONT group. Structures in delayed stage (8-16 cells) were more frequent (P<0.05) in HD (29 vs 1 per cent) goats, as well as the percentage of advanced embryos was greater (P<0.05) for CONT (59.3 vs 33.3 per cent) goats. However, the expression of genes related to apoptosis (BAX and Bcl-2), trophectoderm differentiation (CDX2) and pluripotency maintenance (NANOG) was not affected (P>0.05) in embryos that reached the morulae and blastocyst stages. CONCLUSION Although the HD embryos that developed to morula and blastocyst stages showed no change in the expression of genes related to their quality and implantation capacity, overall, embryo development was impaired in HD-treated goats.
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Affiliation(s)
- Ana Lucia R S Maia
- Departamento de Patologia e Clínica Veterinária, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil
| | - Aline M Arrais
- Departamento de Reprodução e Avaliação Animal, Universidade Federal Rural do Rio de Janeiro, Seropédica, Rio de Janeiro, Brazil
| | - Lucia Prellwitz
- Departamento de Patologia e Clínica Veterinária, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil
| | - Ribrio I T P Batista
- Departamento de Patologia e Clínica Veterinária, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil
| | - Lucas M Figueira
- Departamento de Zootecnia, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil
| | - Lucas F L Correia
- Departamento de Patologia e Clínica Veterinária, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil
| | | | - Joanna M G Souza-Fabjan
- Departamento de Patologia e Clínica Veterinária, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil
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7
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Mechanistic Insights of Astrocyte-Mediated Hyperactive Autophagy and Loss of Motor Neuron Function in SOD1 L39R Linked Amyotrophic Lateral Sclerosis. Mol Neurobiol 2020; 57:4117-4133. [PMID: 32676988 DOI: 10.1007/s12035-020-02006-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Accepted: 06/26/2020] [Indexed: 12/11/2022]
Abstract
Amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disorder with no cure. The reports showed the role of nearby astrocytes around the motor neurons as one among the causes of the disease. However, the exact mechanistic insights are not explored so far. Thus, in the present investigations, we employed the induced pluripotent stem cells (iPSCs) of Cu/Zn-SOD1L39R linked ALS patient to convert them into the motor neurons (MNs) and astrocytes. We report that the higher expression of stress granule (SG) marker protein G3BP1, and its co-localization with the mutated Cu/Zn-SOD1L39R protein in patient's MNs and astrocytes are linked with AIF1-mediated upregulation of caspase 3/7 and hyper activated autophagy. We also observe the astrocyte-mediated non-cell autonomous neurotoxicity on MNs in ALS. The secretome of the patient's iPSC-derived astrocytes exerts significant oxidative stress in MNs. The findings suggest the hyperactive status of autophagy in MNs, as witnessed by the co-distribution of LAMP1, P62 and LC3 I/II with the autolysosomes. Conversely, the secretome of normal astrocytes has shown neuroprotection in patient's iPSC-derived MNs. The whole-cell patch-clamp assay confirms our findings at a physiological functional level in MNs. Perhaps for the first time, we are reporting that the MN degeneration in ALS triggered by the hyper-activation of autophagy and induced apoptosis in both cell-autonomous and non-cell autonomous conditions.
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Naddafpour A, Ghazvini Zadegan F, Hajian M, Hosseini SM, Jafarpour F, Rahimi M, Habibi R, Nasr Esfahani MH. Effects of abundances of OCT-4 mRNA transcript on goat pre-implantation embryonic development. Anim Reprod Sci 2020; 215:106286. [PMID: 32216939 DOI: 10.1016/j.anireprosci.2020.106286] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2019] [Revised: 12/18/2019] [Accepted: 01/16/2020] [Indexed: 12/27/2022]
Abstract
Unlike in mice, the function of pluripotent markers in early embryonic development of domestic animals remains to be elucidated and this may account for the failure to establish embryonic stem cell lines for these species. To study the functions of the OCT-4 protein which has important actions in maintenance of pluripotent and self-renewal processes during early embryonic development, there was induced reduction in relative abundance of OCT-4 mRNA transcript during goat early embryonic development by using RNA interference techniques. The injection of OCT-4 siRNA into goat IVF presumptive zygotes resulted in a decrease in the relative abundance of OCT-4 mRNA transcript; however, there was development of these embryos to the blastocyst stage at the same rate as there was in the control group. The blastocysts from the treated groups had a similar number of TE, ICM, and total cells compared to those from the control group. Although there was a greater relative abundance of NANOG, REX1, and CDX2 mRNA transcript in the embryos injected with siRNA at the 8-16 cell stage, the relative transcript abundances were similar for the control and treatment groups at the blastocyst stage. The relative abundance of SOX2 mRNA transcript was similar for the treatment and control group. It, therefore, is concluded that inhibition of abundances of OCT-4 mRNA transcript to about 20 % of that of the untreated control group did not affect blastocyst formation rate in goats. The functions of OCT-4 in maintaining ICM and TE integrity, however, remains to be assessed.
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Affiliation(s)
- Azadeh Naddafpour
- Department of Reproductive Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran; Department of Biology, University of Science and Culture, Tehran, Iran
| | - Faezeh Ghazvini Zadegan
- Department of Reproductive Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - Mehdi Hajian
- Department of Reproductive Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - Sayyed Morteza Hosseini
- Department of Reproductive Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - Farnoosh Jafarpour
- Department of Reproductive Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - Mohsen Rahimi
- Department of Reproductive Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - Razieh Habibi
- Department of Reproductive Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran; Department of Biology, University of Science and Culture, Tehran, Iran
| | - Mohammad Hossein Nasr Esfahani
- Department of Reproductive Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran.
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9
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Zhou R, Comizzoli P, Keefer CL. Endogenous pluripotent factor expression after reprogramming cat fetal fibroblasts using inducible transcription factors. Mol Reprod Dev 2019; 86:1671-1681. [PMID: 31429169 DOI: 10.1002/mrd.23257] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2019] [Accepted: 07/29/2019] [Indexed: 02/05/2023]
Abstract
Incomplete transgene-silencing remains a challenge in the generation of induced pluripotent stem cells (iPSC) in felids-a critical family in biomedical and biodiversity conservation science. In this study doxycycline-inducible transgenes (NANOG, POU5F1, SOX2, KLF4, and cMYC) were used to reprogram cat fetal fibroblasts with the objective of obtaining iPSC with fully silenced transgenes. Colony formation was slower (14 vs. 8 days) and at lower efficiency than mouse embryonic fibroblasts (0.002% vs. 0.02% of seeded cells). Alkaline-phosphatase positive colonies were grown on feeder cells plus LIF and GSK3, MEK, and ROCK inhibitors. Cells could be passaged singly and transgene expression was silenced at passage 3 (P3) after doxycycline removal at P2. NANOG, POU5F1, and SOX2 were expressed at P3, P6, and P10, although at lower immunostaining intensities than in cat inner cell masses (ICM). Transcripts related to pluripotency (NANOG, POU5F1, SOX2, KLF4, cMYC, and REX1) and differentiation (FGF5, TBXT, GATA6, SOX17, FOXF1, PAX6, and SOX1) were assessed by a reverse transcription-quantitative polymerase chain reaction in iPSC and embryoid bodies. The immunostaining patterns, relatively low levels of NANOG and REX1 in comparison to ICM along with the expression of TBXT (mesoderm) suggested that cells were a mix of reprogrammed pluripotent and differentiating cells.
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Affiliation(s)
- Ran Zhou
- Department of Animal and Avian Sciences, University of Maryland, College Park, Maryland.,Smithsonian Conservation Biology Institute (SCBI), National Zoological Park, Washington, DC
| | - Pierre Comizzoli
- Smithsonian Conservation Biology Institute (SCBI), National Zoological Park, Washington, DC
| | - Carol L Keefer
- Department of Animal and Avian Sciences, University of Maryland, College Park, Maryland
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Zhou R, Wildt DE, Keefer CL, Comizzoli P. Combinations of Growth Factors Regulating LIF/STAT3, WNT, and FGF2 Pathways Sustain Pluripotency-Related Proteins in Cat Embryonic Cells. Stem Cells Dev 2019; 28:329-340. [DOI: 10.1089/scd.2018.0109] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Affiliation(s)
- Ran Zhou
- Department of Animal and Avian Sciences, University of Maryland, College Park, Maryland
- Center for Species Survival, Smithsonian Conservation Biology Institute (SCBI), Washington, District of Columbia
| | - David E. Wildt
- Center for Species Survival, Smithsonian Conservation Biology Institute (SCBI), Washington, District of Columbia
| | - Carol L. Keefer
- Department of Animal and Avian Sciences, University of Maryland, College Park, Maryland
| | - Pierre Comizzoli
- Center for Species Survival, Smithsonian Conservation Biology Institute (SCBI), Washington, District of Columbia
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Functional characterization of NANOG in goat pre-implantation embryonic development. Theriogenology 2018; 120:33-39. [PMID: 30092372 DOI: 10.1016/j.theriogenology.2018.07.023] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Revised: 07/21/2018] [Accepted: 07/23/2018] [Indexed: 11/24/2022]
Abstract
Nanog as a novel pluripotent cell-specific gene plays important roles in regulation of signaling pathways for maintenance and induction of pluripotency in inner cell mass (ICM) and embryonic stem cells (ESC) in mouse. The molecular features and transcription regulation of NANOG gene in domestic animals are not well defined. In this study, we performed knockdown of NANOG mRNA in goat embryos and examined its effect on early embryonic development. Presumptive zygotes were injected with a volume of 8-10 pl NANOG or scrambled (SCR) siRNA, and subsequently cleavage and blastocyst formation rate were assessed. Furthermore, gene expression analysis was carried out in 6-8 cell and blastocyst derived embryos from non-injected controls, SCR - and siRNA-injected presumptive zygotes. Cleavage and blastocyst rates in siRNA groups were insignificantly lower than the control and SCR groups. Embryos with reduced expression of NANOG showed decrease in number of trophectoderm (TE) and total cells in blastocysts. Analysis of expression of developmentally important genes (SOX2, OCT4 and NANOG), which work as a network, showed that NANOG knockdown results in significant increase in expression of SOX2 and OCT4 and among the possible target genes (CDX2, REX1 and GATA4) of this network, only GATA4 showed increased expression. Our results suggest that NANOG is likely to be required for proliferation of trophoblastic cells.
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Temporal expression of pluripotency-associated transcription factors in sheep and cattle preimplantation embryos. ZYGOTE 2018; 26:270-278. [PMID: 30033902 DOI: 10.1017/s0967199418000175] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
SummaryPluripotency-associated transcription factors (PATFs) modulate gene expression during early mammalian embryogenesis. Despite a strong understanding of PATFs during mouse embryogenesis, limited progress has been made in ruminants. This work aimed to describe the temporal expression of eight PATFs during both sheep and cattle preimplantation development. Transcript availability of PATFs was evaluated by reverse transcriptase quantitative polymerase chain reaction (RT-qPCR) in eggs, cleavage-stage embryos, morulae, and blastocysts. Transcripts of five genes were detected in all developmental stages of both species (KLF5, OCT4, RONIN, ZFP281, and ZFX). Furthermore, CMYC was detected in all cattle samples but was found from cleavage-stage onwards in sheep. In contrast, NR0B1 was detected in all sheep samples but was not detected in cattle morulae. GLIS1 displayed the most significant variation in temporal expression between species, as this PATF was only detected in cattle eggs and sheep cleavage-stage embryos and blastocysts. In silico analysis suggested that cattle and sheep PATFs share similar size, isometric point and molecular weight. A phenetic analysis showed two patterns of PATF clustering between cattle and sheep, among several mammalian species. In conclusion, the temporal expression of pluripotency-associated transcription factors differs between sheep and cattle, suggesting species-specific regulation during preimplantation development.
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Moura MT, Silva RL, Cantanhêde LF, Silva JB, Ferreira-Silva JC, Silva PG, Ramos-Deus P, Pandolfi V, Kido EA, Benko-Iseppon AM, Oliveira MA. Activity of non-canonical pluripotency-associated transcription factors in goat cumulus-oocyte complexes. Livest Sci 2018. [DOI: 10.1016/j.livsci.2018.03.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Yu M, Xue T, Chen T, Fang J, Pan Q, Deng Y, Li L, Chen K, Wang Y. Maternal inheritance of Nanog ortholog in blunt-snout bream. JOURNAL OF EXPERIMENTAL ZOOLOGY PART B-MOLECULAR AND DEVELOPMENTAL EVOLUTION 2017; 328:749-759. [PMID: 28834149 DOI: 10.1002/jez.b.22760] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Revised: 05/15/2017] [Accepted: 06/22/2017] [Indexed: 12/28/2022]
Abstract
The homeodomain transcription factor Nanog plays an essential role in maintaining pluripotency and self-renewal of embryonic stem cells in mammals. However, the evolutionary conservation of its ortholog in teleosts remains elusive. Here we isolated and characterized a Nanog homolog named as Ma-Nanog in blunt-snout bream (Megalobrama amblycephala). The full-length genomic sequence is 3,326 bp in length and consists of four exons encoding a homeodomain protein of 386 amino acid residues. Comparison of protein sequences revealed that Ma-Nanog is highly homologous to those in other teleosts, particularly in the homeodomain region. During embryogenesis, RNA expression of Nanog was only detected in early developmental embryos, predominantly at the blastula stage, which suggested the transcripts were mainly present in pluripotent stem cells. RNA fluorescence in situ hybridization verified that the signal of the transcripts is present in the germ cells. RNA expression was observed in the oogonia and early stage of oocytes in the ovary, or in the spermatogonia, spermatocytes, and spermatids in the testis. Surprisingly, the transcripts were also detected in adult tissues such as in liver by RT-PCR or qRT-PCR. Subcellular localization of the Nanog protein was also verified in nuclei. Taken together, these results suggested that Ma-Nanog is maternally inherited with conserved features, thus can be potentially used as a marker for stem cells in blunt-snout bream.
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Affiliation(s)
- Miao Yu
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, People's Republic of China.,College of Fishery, Engineering Technology Research Center of Henan Province for Aquatic Animal Cultivation, Engineering Lab of Henan Province for Aquatic Animal Disease Control, Henan Normal University, Xinxiang, People's Republic of China
| | - Ting Xue
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, People's Republic of China
| | - Tiansheng Chen
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, People's Republic of China.,Collaborative Innovation Center for Efficient and Health Production of Fisheries in Hunan Province, Changde, People's Republic of China.,Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan, People's Republic of China.,Engineering Laboratory of Pond Aquaculture in Hubei Province, Wuhan, People's Republic of China
| | - Jian Fang
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, People's Republic of China
| | - Qihua Pan
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, People's Republic of China
| | - Yu Deng
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, People's Republic of China
| | - Lingyu Li
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, People's Republic of China
| | - Kai Chen
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, People's Republic of China
| | - Yizhou Wang
- College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, People's Republic of China
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Pramod RK, Lee BR, Kim YM, Lee HJ, Park YH, Ono T, Lim JM, Han JY. Isolation, Characterization, and In Vitro Culturing of Spermatogonial Stem Cells in Japanese Quail (Coturnix japonica). Stem Cells Dev 2017; 26:60-70. [DOI: 10.1089/scd.2016.0129] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Affiliation(s)
- Ravindran Kumar Pramod
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, Korea
| | - Bo Ram Lee
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, Korea
| | - Young Min Kim
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, Korea
| | - Hong Jo Lee
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, Korea
| | - Young Hyun Park
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, Korea
| | - Tamao Ono
- Division of Animal Science, Faculty of Agriculture, Shinshu University, Nagano-ken, Japan
| | - Jeong Mook Lim
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, Korea
| | - Jae Yong Han
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, Korea
- Institute for Biomedical Sciences, Shinshu University, Nagano-ken, Japan
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16
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HosseinNia P, Hajian M, Tahmoorespur M, Hosseini SM, Ostadhosseini S, Nasiri MR, Nasr-Esfahani MH. Expression Profile of Developmentally Important Genes in preand peri-Implantation Goat Embryos Produced In Vitro. INTERNATIONAL JOURNAL OF FERTILITY & STERILITY 2016; 10:310-319. [PMID: 27695614 PMCID: PMC5023042 DOI: 10.22074/ijfs.2016.4659] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2016] [Accepted: 05/01/2016] [Indexed: 12/03/2022]
Abstract
Background: Little is understood about the regulation of gene expression during early
goat embryo development. This study investigated the expression profile of 19 genes,
known to be critical for early embryo development in mouse and human, at five different
stages of goat in vitro embryo development (oocyte, 8-16 cell, morula, day-7 blastocyst,
and day 14 blastocyst). Materials and Methods: In this experimental study, stage-specific profiling using real
time-quantitative polymerase chain reaction (RT-qPCR) revealed robust and dynamic
patterns of stage-specific gene activity that fall into four major clusters depending on
their respective mRNA profiles. Results: The gradual pattern of reduction in the maternally stored transcripts without renewal thereafter (cluster-1: Lifr1, Bmpr1, Alk4, Id3, Ctnnb, Akt, Oct4, Rex1, Erk1, Smad1
and 5) implies that their protein products are essential during early cleavages when the
goat embryo is silent and reliant to the maternal legacy of mRNA. The potential importance of transcription augment at day-3 (cluster-2: Fzd, c-Myc, Cdc25a, Sox2) or day-
14 (cluster-3: Fgfr4, Nanog) suggests that they are nascent embryonic mRNAs which
intimately involved in the overriding of MET or regulation of blastocyst formation, respectively. The observation of two expression peaks at both day-3 and day-14 (cluster-4:
Gata4, Cdx2) would imply their potential importance during these two critical stages of
preand periimplantation development. Conclusion: Evolutionary comparison revealed that the selected subset of genes has been
rewired in goat and human/goat similarity is greater than the mouse/goat or bovine/goat
similarities. The developed profiles provide a resource for comprehensive understanding
of goat preimplantation development and pluripotent stem cell engineering as well.
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Affiliation(s)
- Pouria HosseinNia
- Department of Animal Science, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran.,Department of Reproductive Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - Mehdi Hajian
- Department of Reproductive Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - Mojtaba Tahmoorespur
- Department of Animal Science, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Sayyed Morteza Hosseini
- Department of Reproductive Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - Somayyeh Ostadhosseini
- Department of Reproductive Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - Mohammad Reza Nasiri
- Department of Animal Science, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Mohammad Hossein Nasr-Esfahani
- Department of Reproductive Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
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HosseinNia P, Tahmoorespur M, Hosseini SM, Hajian M, Ostadhosseini S, Nasiri MR, Nasr-Esfahani MH. Stage-Specific Profiling of Transforming Growth Factor-β, Fibroblast Growth Factor and Wingless-int Signaling Pathways during Early Embryo Development in The Goat. CELL JOURNAL 2016; 17:648-58. [PMID: 26862524 PMCID: PMC4746415 DOI: 10.22074/cellj.2016.3837] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Accepted: 11/23/2014] [Indexed: 12/24/2022]
Abstract
Objective This research intends to unravel the temporal expression profiles of genes in-
volved in three developmentally important signaling pathways [transforming growth factor-β
(TGF-β), fibroblast growth factor (FGF) and wingless/int (WNT)] during preand peri-implan-
tation goat embryo development.
Materials and Methods In this experimental study, we examined the transcripts that
encoded the ligand, receptor, intracellular signal transducer and modifier, and the down-
stream effector, for each signaling pathway. In vitro mature MII oocytes and embryos at
three distinctive stages [8-16 cell stage, day-7 (D7) blastocysts and day-14 (D14) blas-
tocysts] were separately prepared in triplicate for comparative real-time reverse tran-
scriptase polymerase chain reaction (RT-PCR) using the selected gene sets.
Results Most components of the three signaling pathways were present at more or less
stable levels throughout the assessed oocyte and embryo developmental stages. The
transcripts for TGF-β, FGF and WNT signaling pathways were all induced in unfertilized
MII-oocytes. However, developing embryos showed gradual patterns of decrease in the
activities of TGF-β, FGF and WNT components with renewal thereafter.
Conclusion The results suggested that TGF-β, FGF and WNT are maternally active
signaling pathways required during earlier, rather than later, stages of preand peri-
implantation goat embryo development.
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Affiliation(s)
- Pouria HosseinNia
- Department of Animal Science, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran; Department of Reproductive Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - Mojtaba Tahmoorespur
- Department of Animal Science, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Sayyed Morteza Hosseini
- Department of Reproductive Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - Mehdi Hajian
- Department of Reproductive Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - Somayeh Ostadhosseini
- Department of Reproductive Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - Mohammad Reza Nasiri
- Department of Animal Science, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Mohammad Hossein Nasr-Esfahani
- Department of Reproductive Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
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Shah SM, Saini N, Ashraf S, Zandi M, Manik RS, Singla SK, Palta P, Chauhan MS. Development, Characterization, and Pluripotency Analysis of Buffalo (Bubalus bubalis) Embryonic Stem Cell Lines Derived from In Vitro-Fertilized, Hand-Guided Cloned, and Parthenogenetic Embryos. Cell Reprogram 2015; 17:306-22. [PMID: 26168169 DOI: 10.1089/cell.2014.0098] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
We present the derivation, characterization, and pluripotency analysis of three buffalo embryonic stem cell (buESC) lines, from in vitro-fertilized, somatic cell nuclear-transferred, and parthenogenetic blastocysts. These cell lines were developed for later differentiation into germ lineage cells and elucidation of the signaling pathways involved. The cell lines were established from inner cell masses (ICMs) that were isolated manually from the in vitro-produced blastocysts. Most of the ICMs (45-55%) resulted in formation of primary colonies that were subcultured after 8-10 days, leading subsequently to the formation of three buESC lines, one from each blastocyst type. All the cell lines expressed stem cell markers, such as Alkaline Phosphatase, OCT4, NANOG, SSEA1, SSEA4, TRA-1-60, TRA-1-81, SOX2, REX1, CD-90, STAT3, and TELOMERASE. They differentiated into all three germ layers as determined by ectodermal, mesodermal, and endodermal RNA and protein markers. All of the cell lines showed equal expression of pluripotency markers as well as equivalent differentiation potential into all the three germ layers. The static suspension culture-derived embryoid bodies (EBs) showed greater expression of all the three germ layer markers as compared to hanging drop culture-derived EBs. When analyzed for germ layer marker expression, EBs derived from 15% fetal bovine serum (FBS)-based spontaneous differentiation medium showed greater differentiation across all the three germ layers as compared to those derived from Knock-Out Serum Replacement (KoSR)-based differentiation medium.
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Affiliation(s)
- Syed Mohmad Shah
- Animal Biotechnology Centre, National Dairy Research Institute , Karnal 132001, Haryana, India
| | - Neha Saini
- Animal Biotechnology Centre, National Dairy Research Institute , Karnal 132001, Haryana, India
| | - Syma Ashraf
- Animal Biotechnology Centre, National Dairy Research Institute , Karnal 132001, Haryana, India
| | - Mohammad Zandi
- Animal Biotechnology Centre, National Dairy Research Institute , Karnal 132001, Haryana, India
| | - Radhey Sham Manik
- Animal Biotechnology Centre, National Dairy Research Institute , Karnal 132001, Haryana, India
| | - Suresh Kumar Singla
- Animal Biotechnology Centre, National Dairy Research Institute , Karnal 132001, Haryana, India
| | - Prabhat Palta
- Animal Biotechnology Centre, National Dairy Research Institute , Karnal 132001, Haryana, India
| | - Manmohan Singh Chauhan
- Animal Biotechnology Centre, National Dairy Research Institute , Karnal 132001, Haryana, India
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Mohamad-Fauzi N, Ross PJ, Maga EA, Murray JD. Impact of source tissue and ex vivo expansion on the characterization of goat mesenchymal stem cells. J Anim Sci Biotechnol 2015; 6:1. [PMID: 25838897 PMCID: PMC4382838 DOI: 10.1186/2049-1891-6-1] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Accepted: 12/18/2014] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND There is considerable interest in using goats as models for genetically engineering dairy animals and also for using stem cells as therapeutics for bone and cartilage repair. Mesenchymal stem cells (MSCs) have been isolated and characterized from various species, but are poorly characterized in goats. RESULTS Goat MSCs isolated from bone marrow (BM-MSCs) and adipose tissue (ASCs) have the ability to undergo osteogenic, adipogenic and chondrogenic differentiation. Cytochemical staining and gene expression analysis show that ASCs have a greater capacity for adipogenic differentiation compared to BM-MSCs and fibroblasts. Different methods of inducing adipogenesis also affect the extent and profile of adipogenic differentiation in MSCs. Goat fibroblasts were not capable of osteogenesis, hence distinguishing them from the MSCs. Goat MSCs and fibroblasts express CD90, CD105, CD73 but not CD45, and exhibit cytoplasmic localization of OCT4 protein. Goat MSCs can be stably transfected by Nucleofection, but, as evidenced by colony-forming efficiency (CFE), yield significantly different levels of progenitor cells that are robust enough to proliferate into colonies of integrants following G418 selection. BM-MSCs expanded over increasing passages in vitro maintained karyotypic stability up to 20 passages in culture, exhibited an increase in adipogenic differentiation and CFE, but showed altered morphology and amenability to genetic modification by selection. CONCLUSIONS Our findings provide characterization information on goat MSCs, and show that there can be significant differences between MSCs isolated from different tissues and from within the same tissue. Fibroblasts do not exhibit trilineage differentiation potential at the same capacity as MSCs, making it a more reliable method for distinguishing MSCs from fibroblasts, compared to cell surface marker expression.
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Affiliation(s)
- Nuradilla Mohamad-Fauzi
- Department of Animal Science, University of California, Davis, California 95616 USA ; Institute of Ocean and Earth Sciences, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Pablo J Ross
- Department of Animal Science, University of California, Davis, California 95616 USA
| | - Elizabeth A Maga
- Department of Animal Science, University of California, Davis, California 95616 USA
| | - James D Murray
- Department of Animal Science, University of California, Davis, California 95616 USA ; Department of Population Health and Reproduction, University of California, Davis, California 95616 USA
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20
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Moradi M, Riasi A, Ostadhosseini S, Hajian M, Hosseini M, Hosseinnia P, Nasr-Esfahani MH. Expression profile of FGF receptors in preimplantation ovine embryos and the effect of FGF2 and PD173074. Growth Factors 2015; 33:393-400. [PMID: 26768755 DOI: 10.3109/08977194.2015.1102138] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Fibroblast growth factors (FGFs) and their receptors (FGFRs) are increasingly recognized as important regulators of embryo development in mammals. This study investigated the importance of FGF signaling during in vitro development of ovine embryo. The mRNAs of four FGFR subtypes were detected throughout preimplantation development of in vitro fertilized (IVF) embryos, peaked in abundance at the morula stage, and decreased significantly at the blastocyst stage. To gain insight into the role of these mRNAs in embryo development, IVF embryos were cultured in the presence of FGF2 (100 or 500 ng/ml: beginning from days 1 or 4 to 7) or PD173074 (1 µM: beginning from days 1 to 7) as usual treatments for activation or inhibition of FGFRs, respectively. FGF2-supplementation did not affect the percentage of embryos that developed to the blastocyst, blastocyst cell count and the proportion of cells allocated in inner cell mass (ICM) and trophectoderm (TE) compared to control (p > 0.05). Also, increasing the dosage or duration of FGF2 treatment did not significantly alter blastocyst yield or differential cell count (p > 0.05). PD173074-mediated inhibition of FGFRs did not significantly affect blastocyst yield (p > 0.05). Assessment of expression profiles of lineage-associated markers revealed that FGF2 (500 ng/ml) supplementation: (i) significantly increased expression of putative hypoblast marker (GATA4), (ii) significantly decreased expression of putative epiblast (EPI) marker (NANOG) and (iii) did not change TE markers (CDX2 and IFNT) and pluripotency makers (OCT4, SOX2 and REX1). In summary, FGF2-mediated activation of FGFRs may promote a switch in transcriptional profile of ovine ICM from EPI- to hypoblast-associated gene expression.
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MESH Headings
- Animals
- Blastocyst/metabolism
- Embryonic Development/drug effects
- Female
- Fibroblast Growth Factor 2/pharmacology
- GATA4 Transcription Factor/biosynthesis
- Gene Expression Regulation, Developmental/physiology
- Homeodomain Proteins/biosynthesis
- Male
- Pyrimidines/pharmacology
- Receptor, Fibroblast Growth Factor, Type 1/antagonists & inhibitors
- Receptor, Fibroblast Growth Factor, Type 1/biosynthesis
- Receptor, Fibroblast Growth Factor, Type 2/antagonists & inhibitors
- Receptor, Fibroblast Growth Factor, Type 2/biosynthesis
- Receptor, Fibroblast Growth Factor, Type 3/antagonists & inhibitors
- Receptor, Fibroblast Growth Factor, Type 3/biosynthesis
- Receptor, Fibroblast Growth Factor, Type 4/antagonists & inhibitors
- Receptor, Fibroblast Growth Factor, Type 4/biosynthesis
- Sheep
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Affiliation(s)
- Mehdi Moradi
- a Department of Reproductive Biotechnology , Reproductive Biomedicine Research Center, Royan Institute for Biotechnology , ACECR , Isfahan , Iran
- b Department of Animal Science , College of Agriculture, Isfahan University of Technology , Isfahan , Iran , and
| | - Ahmad Riasi
- b Department of Animal Science , College of Agriculture, Isfahan University of Technology , Isfahan , Iran , and
| | - Somayyeh Ostadhosseini
- a Department of Reproductive Biotechnology , Reproductive Biomedicine Research Center, Royan Institute for Biotechnology , ACECR , Isfahan , Iran
| | - Mehdi Hajian
- a Department of Reproductive Biotechnology , Reproductive Biomedicine Research Center, Royan Institute for Biotechnology , ACECR , Isfahan , Iran
| | - Morteza Hosseini
- a Department of Reproductive Biotechnology , Reproductive Biomedicine Research Center, Royan Institute for Biotechnology , ACECR , Isfahan , Iran
| | - Pouria Hosseinnia
- a Department of Reproductive Biotechnology , Reproductive Biomedicine Research Center, Royan Institute for Biotechnology , ACECR , Isfahan , Iran
| | - Mohammad Hossein Nasr-Esfahani
- a Department of Reproductive Biotechnology , Reproductive Biomedicine Research Center, Royan Institute for Biotechnology , ACECR , Isfahan , Iran
- c Department of Embryology , Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine , ACECR , Tehran , Iran
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21
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Quantitative expression of pluripotency-related genes in parthenogenetically produced buffalo (Bubalus bubalis) embryos and in putative embryonic stem cells derived from them. Gene Expr Patterns 2014; 16:23-30. [DOI: 10.1016/j.gep.2014.06.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2013] [Revised: 05/29/2014] [Accepted: 06/02/2014] [Indexed: 12/23/2022]
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Feng X, Cao S, Wang H, Meng C, Li J, Jiang J, Qian Y, Su L, He Q, Zhang Q. Production of transgenic dairy goat expressing human α-lactalbumin by somatic cell nuclear transfer. Transgenic Res 2014; 24:73-85. [PMID: 25139669 DOI: 10.1007/s11248-014-9818-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2013] [Accepted: 07/17/2014] [Indexed: 11/30/2022]
Abstract
Production of human α-lactalbumin (hα-LA) transgenic cloned dairy goats has great potential in improving the nutritional value and perhaps increasing the yield of dairy goat milk. Here, a mammary-specific expression vector 5A, harboring goat β-lactoglobulin (βLG) promoter, the hα-LA gene, neo(r) and EGFP dual markers, was constructed. Then, it was effectively transfected into goat mammary epithelial cells (GMECs) and the expression of hα-LA was investigated. Both the hα-LA transcript and protein were detected in the transfected GMECs after the induction of hormonal signals. In addition, the 5A vector was introduced into dairy goat fetal fibroblasts (transfection efficiency ≈60-70%) to prepare competent transgenic donor cells. A total of 121 transgenic fibroblast clones were isolated by 96-well cell culture plates and screened with nested-PCR amplification and EGFP fluorescence. After being frozen for 8 months, the transgenic cells still showed high viabilities, verifying their ability as donor cells. Dairy goat cloned embryos were produced from these hα-LA transgenic donor cells by somatic cell nuclear transfer (SCNT), and the rates of fusion, cleavage, and the development to blastocyst stages were 81.8, 84.4, and 20.0%, respectively. A total of 726 reconstructed embryos derived from the transgenic cells were transferred to 74 recipients and pregnancy was confirmed at 90 days in 12 goats. Of six female kids born, two carried hα-LA and the hα-LA protein was detected in their milk. This study provides an effective system to prepare SCNT donor cells and transgenic animals for human recombinant proteins.
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Affiliation(s)
- Xiujing Feng
- Institute of Animal Science, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu, 210014, China
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Henderson GRW, Brahmasani SR, Yelisetti UM, Konijeti S, Katari VC, Sisinthy S. Candidate gene expression patterns in rabbit preimplantation embryos developed in vivo and in vitro. J Assist Reprod Genet 2014; 31:899-911. [PMID: 24760721 DOI: 10.1007/s10815-014-0233-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2013] [Accepted: 04/03/2014] [Indexed: 12/20/2022] Open
Abstract
PURPOSE The levels and timing of expression of genes like BCLXL, HDAC1 and pluripotency marker genes namely, OCT4, SOX2, NANOG and KLF4 are known to influence preimplantation embryo development. Despite this information, precise understanding of their influence during preimplantation embryo development is lacking. The present study attempts to compare the expression of these genes in the in vivo and in vitro developed preimplantation embryos. METHODS The in vivo and in vitro developed rabbit embryos collected at distinct developmental stages namely, pronuclear, 2 cell, 4 cell, 8 cell, 16 cell, Morula and blastocyst were compared at the transcriptional and translational levels using Real Time PCR and immunocytochemical studies respectively. RESULTS The study establishes the altered levels of candidate genes at the transcriptional level and translational level with reference to the zygotic genome activation (ZGA) phase of embryo development in the in vivo and in vitro developed embryos. The expression of OCT4, KLF4, NANOG and SOX2 genes were higher in the in vitro developed embryos whereas and HDAC1 was lower. BCLXL expression had its peak at ZGA in in vivo developed embryos. Protein expression of all the candidate genes was observed in the embryos. BCLXL, KLF4 and NANOG exhibited diffused localisation whereas HDAC1, OCT4, and SOX2 exhibited nuclear localisation. CONCLUSIONS This study leads to conclude that BCLXL peak expression at the ZGA phase may be a requirement for embryo development. Further expression of all the candidate genes was influenced by ZGA phase of development at the transcript level, but not at the protein level.
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Abstract
The transcription of rRNA is critical to all living cells and is tightly controlled at the level of chromatin structure. Although the widespread adoption of genomic technologies including chromatin immunoprecipitation with massively parallel short-read sequencing (ChIP-seq) has allowed for the interrogation of chromatin structure on a genome-wide scale, until recently rDNA has not been analyzed by this technique. We extended genomic analysis of rDNA to mouse (Mus musculus), in which rDNA is similar in structure but highly divergent in sequence compared with human rDNA. Comparison of rDNA histone marks between mouse embryonic stem cells (mESCs) and more differentiated mouse cell types revealed differences between pluripotent and differentiated states. We also observed substantial divergence in rDNA histone modification patterns between mESCs and human embryonic stem cells (hESCs). Surprisingly, we found that the pluripotency factor OCT4 was bound to rDNA in similar patterns in mESCs and hESCs. Extending this analysis, we found that an additional 17 pluripotency-associated factors were bound to rDNA in mESCs, suggesting novel modes of rDNA regulation in pluripotent cells. Taken together, our results provide a detailed view of rDNA chromatin structure in an important model system and enable high-resolution comparison of rDNA regulation between mouse and human.
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25
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Lee SH, Cha SH, Kim CL, Lillehoj HS, Song JY, Lee KW. Enhanced adipogenic differentiation of bovine bone marrow-derived mesenchymal stem cells. JOURNAL OF APPLIED ANIMAL RESEARCH 2014. [DOI: 10.1080/09712119.2014.883320] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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26
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Guo Y, Lei L, Ma X, Wang H. Characterization of the proximal region of the goat NANOG promoter that is used for monitoring cell reprogramming and early embryo development. Vet J 2014; 199:80-7. [DOI: 10.1016/j.tvjl.2013.10.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2013] [Revised: 09/22/2013] [Accepted: 10/01/2013] [Indexed: 12/20/2022]
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27
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Identification and characterization of a nanog homolog in Japanese flounder (Paralichthys olivaceus). Gene 2013; 531:411-21. [PMID: 24013085 DOI: 10.1016/j.gene.2013.08.030] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2013] [Revised: 07/28/2013] [Accepted: 08/10/2013] [Indexed: 02/06/2023]
Abstract
The homeodomain-containing transcription factor nanog plays a key role in maintaining the pluripotency and self-renewal of embryonic stem cells in mammals. Stem cells offered as a significant and effective tool for generation of transgenic animals and preservation of genetic resources. The molecular genetic organization and expression of nanog gene in marine fish have not been reported yet. In this study, we isolated and characterized the flounder nanog gene as a first step towards understanding the mechanism of the plurpotency of fish stem cells and develop a potential molecular marker to identify the stem cells in vivo and in vitro. Phylogenetic, gene structure and chromosome synteny analysis provided the evidence that Po-nanog is homologous to the mammalian nanog gene. Protein sequence comparison showed that flounder Nanog shared low similarity with other vertebrate orthologs except for a conserved homeodomain. Quantitative RT-PCR analysis showed that flounder nanog was maternally expressed, and the transcripts were present from the one-cell stage to the neurula stage with the peaking at blastula stage. Whole mount in situ hybridization analyses demonstrated that the transcripts were present in all blastomeres of the early embryo. Tissue distribution analysis indicated that nanog was detectable only in gonads. Further, the expression was significantly high in ovary than in testis. In situ hybridization revealed that the transcripts were located in the cytoplasm of the oogonia and oocytes in ovary, only in the spermatogonia but no spermatocytes or spermatids in testis. The promoter region was also analyzed to have several basal core promoter elements and transcription factor binding sites. All these results suggest that Po-Nanog may have a conservative function between teleosts and mammals.
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28
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Schiffmacher AT, Keefer CL. CDX2 regulates multiple trophoblast genes in bovine trophectoderm CT-1 cells. Mol Reprod Dev 2013; 80:826-39. [PMID: 23836438 DOI: 10.1002/mrd.22212] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Accepted: 06/27/2013] [Indexed: 11/06/2022]
Abstract
The bovine trophectoderm (TE) undergoes a dramatic morphogenetic transition prior to uterine endometrial attachment. Many studies have documented trophoblast-specific gene expression profiles at various pre-attachment stages, yet genetic interactions within the transitioning TE gene regulatory network are not well characterized. During bovine embryogenesis, transcription factors OCT4 and CDX2 are co-expressed during early trophoblast elongation. In this study, the bovine trophectoderm-derived CT-1 cell line was utilized as a genetic model to examine the roles of CDX2 and OCT4 within the bovine trophoblast gene regulatory network. An RT-PCR screen for TE-lineage transcription factors identified expression of CDX2, ERRB, ID2, SOX15, ELF5, HAND1, and ASCL2. CT-1 cells also express a nuclear-localized, 360 amino acid OCT4 ortholog of the pluripotency-specific human OCT4A. To delineate the roles of CDX2 and OCT4 within the CT-1 gene network, CDX2 and OCT4 levels were manipulated via overexpression and siRNA-mediated knockdown. An increase in CDX2 negatively regulated OCT4 expression, but increased expression of IFNT, HAND1, ASCL2, SOX15, and ELF5. A reduction of CDX2 levels exhibited a reciprocal effect, resulting in decreased expression of IFNT, HAND1, ASCL2, and SOX15. Both overexpression and knockdown of CDX2 increased ETS2 transcription. In contrast to CDX2, manipulation of OCT4 levels only revealed a positive autoregulatory mechanism and upregulation of ASCL2. Together, these results suggest that CDX2 is a core regulator of multiple trophoblast genes within CT-1 cells.
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Affiliation(s)
- Andrew T Schiffmacher
- Department of Animal and Avian Sciences, University of Maryland, College Park, Maryland
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Madeja ZE, Sosnowski J, Hryniewicz K, Warzych E, Pawlak P, Rozwadowska N, Plusa B, Lechniak D. Changes in sub-cellular localisation of trophoblast and inner cell mass specific transcription factors during bovine preimplantation development. BMC DEVELOPMENTAL BIOLOGY 2013; 13:32. [PMID: 23941255 PMCID: PMC3751447 DOI: 10.1186/1471-213x-13-32] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/17/2012] [Accepted: 08/07/2013] [Indexed: 02/27/2023]
Abstract
Background Preimplantation bovine development is emerging as an attractive experimental model, yet little is known about the mechanisms underlying trophoblast (TE)/inner cell mass (ICM) segregation in cattle. To gain an insight into these processes we have studied protein and mRNA distribution during the crucial stages of bovine development. Protein distribution of lineage specific markers OCT4, NANOG, CDX2 were analysed in 5-cell, 8–16 cell, morula and blastocyst stage embryos. ICM/TE mRNA levels were compared in hatched blastocysts and included: OCT4, NANOG, FN-1, KLF4, c-MYC, REX1, CDX2, KRT-18 and GATA6. Results At the mRNA level the observed distribution patterns agree with the mouse model. CDX2 and OCT4 proteins were first detected in 5-cell stage embryos. NANOG appeared at the morula stage and was located in the cytoplasm forming characteristic rings around the nuclei. Changes in sub-cellular localisation of OCT4, NANOG and CDX2 were noted from the 8–16 cell onwards. CDX2 initially co-localised with OCT4, but at the blastocyst stage a clear lineage segregation could be observed. Interestingly, we have observed in a small proportion of embryos (2%) that CDX2 immunolabelling overlapped with mitotic chromosomes. Conclusions Cell fate specification in cattle become evident earlier than presently anticipated – around the time of bovine embryonic genome activation. There is an intriguing possibility that for proper lineage determination certain transcription factors (such as CDX2) may need to occupy specific regions of chromatin prior to its activation in the interphase nucleus. Our observation suggests a possible role of CDX2 in the process of epigenetic regulation of embryonic cell fate.
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Affiliation(s)
- Zofia E Madeja
- Department of Genetics and Animal Breeding, Poznan University of Life Sciences, Wolynska 33, Poznan 60-673, Poland.
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De AK, Garg S, Singhal DK, Malik H, Mukherjee A, Jena MK, Kumar S, Kaushik JK, Mohanty AK, Das BC, Bag S, Bhanja SK, Malakar D. Derivation of goat embryonic stem cell-like cell lines from in vitro produced parthenogenetic blastocysts. Small Rumin Res 2013. [DOI: 10.1016/j.smallrumres.2013.01.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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31
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Nowak-Imialek M, Niemann H. Pluripotent cells in farm animals: state of the art and future perspectives. Reprod Fertil Dev 2013; 25:103-28. [PMID: 23244833 DOI: 10.1071/rd12265] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Pluripotent cells, such as embryonic stem (ES) cells, embryonic germ cells and embryonic carcinoma cells are a unique type of cell because they remain undifferentiated indefinitely in in vitro culture, show self-renewal and possess the ability to differentiate into derivatives of the three germ layers. These capabilities make them a unique in vitro model for studying development, differentiation and for targeted modification of the genome. True pluripotent ESCs have only been described in the laboratory mouse and rat. However, rodent physiology and anatomy differ substantially from that of humans, detracting from the value of the rodent model for studies of human diseases and the development of cellular therapies in regenerative medicine. Recently, progress in the isolation of pluripotent cells in farm animals has been made and new technologies for reprogramming of somatic cells into a pluripotent state have been developed. Prior to clinical application of therapeutic cells differentiated from pluripotent stem cells in human patients, their survival and the absence of tumourigenic potential must be assessed in suitable preclinical large animal models. The establishment of pluripotent cell lines in farm animals may provide new opportunities for the production of transgenic animals, would facilitate development and validation of large animal models for evaluating ESC-based therapies and would thus contribute to the improvement of human and animal health. This review summarises the recent progress in the derivation of pluripotent and reprogrammed cells from farm animals. We refer to our recent review on this area, to which this article is complementary.
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Affiliation(s)
- Monika Nowak-Imialek
- Institut of Farm Animal Genetics, Friedrich-Loefller-Institut (FLI), Biotechnology, Höltystrasse 10, Mariensee, 31535 Neustadt, Germany.
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The development and expression of pluripotency genes in embryos derived from nuclear transfer and in vitro fertilization. ZYGOTE 2013; 22:540-8. [DOI: 10.1017/s0967199413000129] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
SummarySomatic cell nuclear transfer can be used to produce embryonic stem (ES) cells, cloned animals, and can even increase the population size of endangered animals. However, the application of this technique is limited by the low developmental rate of cloned embryos, a situation that may result from abnormal expression of some zygotic genes. In this study, sheep–sheep intra-species cloned embryos, goat–sheep inter-species cloned embryos, or sheep in vitro fertilized embryos were constructed and cultured in vitro and the developmental ability and expression of three pluripotency genes, SSEA-1, Nanog and Oct4, were examined. The results showed firstly that the developmental ability of in vitro fertilized embryos was significantly higher than that of cloned embryos. In addition, the percentage of intra-species cloned embryos that developed to morula or blastocyst stages was also significantly higher than that of the inter-species cloned embryos. Secondly, all three types of embryos expressed SSEA-1 at the 8-cell and morula stages. At the 8-cell stage, a higher percentage of in vitro fertilized embryos expressed SSEA-1 than occurred for cloned embryos. However, at the morula stage, all detected embryos could express SSEA-1. Thirdly, the three types of embryos expressed Oct4 mRNA at the morula and blastocyst stages, and embryos at the blastocyst stage expressed Nanog mRNA. The rate of expression of Oct4 and Nanog mRNA at these developmental stages was higher in in vitro fertilized embryos than in cloned embryos. These results indicated that, during early development, the failure to reactivate some pluripotency genes maybe is a reason for the low cloning efficiency found with cloned embryos.
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Selection of appropriate isolation method based on morphology of blastocyst for efficient derivation of buffalo embryonic stem cells. Cytotechnology 2013; 66:239-50. [PMID: 23553019 DOI: 10.1007/s10616-013-9561-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2012] [Accepted: 03/26/2013] [Indexed: 10/27/2022] Open
Abstract
The efficiency of embryonic stem cell (ESC) derivation from all species except for rodents and primates is very low. There are however, multiple interests in obtaining pluripotent cells from these animals with main expectations in the fields of transgenesis, cloning, regenerative medicine and tissue engineering. Researches are being carried out in laboratories throughout the world to increase the efficiency of ESC isolation for their downstream applications. Thus, the present study was undertaken to study the effect of different isolation methods based on the morphology of blastocyst for efficient derivation of buffalo ESCs. Embryos were produced in vitro through the procedures of maturation, fertilization and culture. Hatched blastocysts or isolated inner cell masses (ICMs) were seeded on mitomycin-C inactivated buffalo fetal fibroblast monolayer for the development of ESC colonies. The ESCs were analyzed for alkaline phosphatase activity, expression of pluripotency markers and karyotypic stability. Primary ESC colonies were obtained after 2-5 days of seeding hatched blastocysts or isolated ICMs on mitomycin-C inactivated feeder layer. Mechanically isolated ICMs attached and formed primary cell colonies more efficiently than ICMs isolated enzymatically. For derivation of ESCs from poorly defined ICMs intact hatched blastocyst culture was the most successful method. Results of this study implied that although ESCs can be obtained using all three methods used in this study, efficiency varies depending upon the morphology of blastocyst and isolation method used. So, appropriate isolation method must be selected depending on the quality of blastocyst for efficient derivation of ESCs.
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34
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Lei L, Li L, Du F, Chen CH, Wang H, Keefer CL. Monitoring bovine fetal fibroblast reprogramming utilizing a bovine NANOG promoter-driven EGFP reporter system. Mol Reprod Dev 2013; 80:193-203. [PMID: 23280629 DOI: 10.1002/mrd.22147] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2012] [Accepted: 12/17/2012] [Indexed: 01/23/2023]
Abstract
NANOG is an essential transcription factor involved in the proliferation and maintenance of embryonic stem cells (ESC) and reprogramming of somatic cells to a pluripotent state. Oct4 and Nanog promoter-driven enhanced green fluorescent protein (EGFP) reporters have been employed for establishing lines of induced pluripotent stem cells (iPSC) from mouse, human, and pig. In ruminants, including cattle, in which no fully validated ESC lines have been established, iPSC generated by reprogramming somatic cells to an ESC-like state may prove useful in the production of genetically modified livestock. In this study, utility of the bovine NANOG reporter was tested for use with cattle. Seven proximal bovine NANOG promoter fragments of different size were fused to the LUC gene, and were tested in mouse ESC lines using a dual-luciferase assay. Three of the bovine NANOG promoters, 315 bp (-134/+181), 446 bp (-265/+181), and 1,100 bp (-919/+181), were fused to a nuclear localized signal EGFP reporter gene. The fidelity of these constructs was analyzed by transfection into mouse ESC and bovine fetal fibroblasts (bFFs), and subsequent reprogramming of the bFF. Fusion of the transgenic bFF with human teratocarcinoma (NTERA2) cells induced nuclear expression of the EGFP reporter. Similarly, bFF-derived somatic cell nuclear transfer (SCNT) embryos expressed EGFP in a stage- and location-appropriate manner. Following reprogramming of transgenic bFFs for 10 days with an Oct4-Sox2-Klf4-cMyc vector, iPSC expressed EGFP and alkaline phosphatase. These results indicate that NANOG reporters can be used to monitor nuclear reprogramming of bFFs and to distinguish cell allocation in SCNT-derived embryos.
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Affiliation(s)
- Lei Lei
- College of Veterinary Medicine, Shaanxi Center for Stem Cell Engineering and Technology, Northwest A&F University, Yangling, P.R. China
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35
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Behboodi E, Lam L, Gavin WG, Bondareva A, Dobrinski I. Goat embryonic stem-like cell derivation and characterization. Methods Mol Biol 2013; 1074:51-67. [PMID: 23975805 DOI: 10.1007/978-1-62703-628-3_5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Embryonic stem (ES) cells are derived from the inner cell masses of preimplantation embryos. ES cells are pluripotent cells with the capacity for long-term propagation and broad differentiation plasticity. These cells have an exceptional functional feature in that they can differentiate into all tissues and organs, including germ cells. Established ES cell lines have been generated in mouse, human, and nonhuman primate but derivation of ES cells in farm animals has been problematic. Several ES-like cell lines from farm animals have been reported to exhibit properties of pluripotency in vitro. However, only a few of them morphologically resemble ES cells, or express markers that are associated with established ES cell lines from mouse and humans. Methods for derivation, propagation, and differentiation of ES cells from domestic animals have not been fully established. In this chapter, we describe methods for isolation of goat ES (gES) cell lines from in vivo-derived blastocysts and characterization of markers indicative of pluripotency. In addition, we outline differentiation of gES cells into all three germ layers in vivo by forming teratomas as a hallmark of pluripotency.
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Affiliation(s)
- Esmail Behboodi
- Department of Comparative Biology and Experimental Medicine, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
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36
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Kumar A, Kumar K, Singh R, Puri G, Ranjan R, Yasotha T, Singh RK, Sarkar M, Bag S. Effect of mitotic inducers and retinoic acid blocker on expression of pluripotent genes in ES cells derived from early stage in vitro-produced embryos in buffalo. In Vitro Cell Dev Biol Anim 2012; 48:625-32. [PMID: 23093464 DOI: 10.1007/s11626-012-9556-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2012] [Accepted: 09/18/2012] [Indexed: 11/28/2022]
Abstract
So far, it has been difficult to generate embryonic stem (ES) cell from early stage preimplantation embryos of buffalo. These ES cells will be more helpful for efficient embryo cloning and generation of body cells as they are more primitive than inner cell mass (ICM)-derived ES cells. The present study was conducted to find the effect of lipopolysaccharide (LPS), melatonin (N-acetyl-5-methoxytryptamine, a pineal gland product), and citral (3,7-dimethyl-2,6-octadienal and a retinoic acid synthesis blocker) on establishment of primary ES cell colonies, the comparative size of the ES cell colonies, and expression of pluripotent genes during extended period of culture in buffalo. Zona-free eight-cell stage in vitro fertilization (IVF) embryos were cultured in ES cell medium supplemented with none (media I as control), LPS (media II), citral melatonin (media III), or melatonin (media IV). The multiplication of blastomere leading to ES cell colony formation and expression of pluripotent genes were assessed up to day 20 of culture. The primary colony formation, the comparative size of the ES cell colonies, and expression of pluripotent genes in these colonies were better in the medium supplemented with melatonin in all days of culture. Within melatonin supplementation, the colony size was comparatively larger on day 8 and day 12 of culture. Further, with this supplementation, the Oct-4 and Nanog expression was comparatively higher on all days of culture. The results indicated that supplementation of melatonin helped in the formation of better primary ES cell colony as well as in the maintenance of pluripotency. The results also indicated that primary colonies developed on day 8 to day 12 of culture may be better for passaging them for establishment of ES cell line from early stage preimplantation IVF embryos of in buffalo.
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Affiliation(s)
- Ashok Kumar
- Reproductive Physiology and Embryo Transfer Technology Laboratory, Physiology and Climatology Division, Indian Veterinary Research Institute, Izatnagar, Uttar Pradesh, 243 122, India
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37
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Isolation, culturing and characterization of feeder-independent amniotic fluid stem cells in buffalo (Bubalus bubalis). Res Vet Sci 2012; 93:743-8. [DOI: 10.1016/j.rvsc.2011.09.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2011] [Revised: 06/09/2011] [Accepted: 09/09/2011] [Indexed: 12/27/2022]
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38
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Zhang Y, Fan Y, Wang Z, Wan Y, Zhou Z, Zhong B, Wang L, Wang F. Isolation, characterization, and gene modification of dairy goat mesenchymal stem cells from bone marrow. In Vitro Cell Dev Biol Anim 2012; 48:418-25. [PMID: 22806970 DOI: 10.1007/s11626-012-9530-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2012] [Accepted: 06/17/2012] [Indexed: 01/13/2023]
Abstract
Bone marrow mesenchymal stem cells (MSCs) are adult pluripotent cells that are considered to be an attractive cell type for therapy models and for nuclear transfer transgenesis. To date, MSCs from various species have been studied, but only a limited amount of information regarding dairy goat MSCs (gMSCs) is available. The objectives of this study were to isolate, induce the multilineage mesenchymal differentiation, and investigate the gene modification efficiency of gMSCs, thereby initiating further research on these cells. The gMSCs isolated from bone marrow grew, attached to plastic with a typical fibroblast-like morphology, and expressed the mesenchymal surface marker CD44, CD29, CD90, and CD166, but not the hematopoietic marker CD45. Furthermore, the gMSCs expressed the transcription factors Oct-4 and Nanog, which have been shown to be critical for stem cell self-renewal and pluripotency. The multilineage differentiation potential of gMSCs was revealed by their ability to undergo adipogenic and osteogenic differentiation when exposed to specific inducing conditions. Transient transduction of gMSCs with a plasmid containing the GFP gene resulted in higher transfection rate compared with fetal fibroblasts (FFs). Furthermore, cell colonies with stable genetic modifications were obtained when gMSCs were transfected with a mammary-specific expression vector containing human lysosomal acid beta-glucosidase gene (hGCase). In conclusion, these results demonstrated that typical mesenchymal stem cells were isolated from dairy goat bone marrow, possessed the characteristics of pluripotent stem cells, and had the potential of specific genetic modifications for gene therapy and producing transgenic goats.
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Affiliation(s)
- Yanli Zhang
- Center of Animal Embryo Engineering and Technology, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China.
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39
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Malaver-Ortega LF, Sumer H, Liu J, Verma PJ. The state of the art for pluripotent stem cells derivation in domestic ungulates. Theriogenology 2012; 78:1749-62. [PMID: 22578625 DOI: 10.1016/j.theriogenology.2012.03.031] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2011] [Revised: 03/19/2012] [Accepted: 03/22/2012] [Indexed: 12/21/2022]
Abstract
Since the successful isolation, characterization and long-term culture of embryonic stem cells (ESCs) from mice in the early 1980s and from humans a decade later, considerable effort has been made to establish ESCs lines from livestock. The derivation of validated ESCs lines is a necessary step if the generation of economically relevant transgenic animals is to be achieved. However, this is still elusive, as the isolation of true ESCs lines for livestock has not been accomplished to date. It has been demonstrated that by forced expression of a defined set of transcription factors, it is possible to reprogram somatic cells to cells that closely resemble an ES-like state. These cells were termed induced pluripotent stem cells (iPSCs). We introduce the basic concepts relating to stem cell biology and give an overview of the various attempts to isolate and generate pluripotent stem cells (PSCs) from species relevant to livestock production. Further, we point out the issues to be addressed and hurdles to be overcome to realize the promise of stem cells in agriculture.
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40
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Deshmukh RS, Østrup O, Strejcek F, Vejlsted M, Lucas-Hahn A, Petersen B, Li J, Callesen H, Niemann H, Hyttel P. Early aberrations in chromatin dynamics in embryos produced under in vitro conditions. Cell Reprogram 2012; 14:225-34. [PMID: 22468997 DOI: 10.1089/cell.2011.0069] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
In vitro production of porcine embryos by means of in vitro fertilization (IVF) or somatic cell nuclear transfer (SCNT) is limited by great inefficienciy. The present study investigated chromatin and nucleolar dynamics in porcine embryos developed in vivo (IV) and compared this physiological standard to that of embryos produced by IVF, parthenogenetic activation (PA), or SCNT. In contrast to IV embryos, chromatin spatial and temporal dynamics in PA, IVF, and SCNT embryos were altered; starting with aberrant chromatin-nuclear envelope interactions at the two-cell stage, delayed chromatin decondensation and nucleolar development at the four-cell stage, and ultimately culminating in failure of proper first lineage segregation at the blastocyst stage, demonstrated by poorly defined inner cell mass. Interestingly, in vitro produced (IVP) embryos also lacked a heterochromatin halo around nucleolar precursors, indicating imperfections in global chromatin remodeling after fertilization/activation. Porcine IV-produced zygotes and embryos display a well-synchronized pattern of chromatin dynamics compatible with genome activation and regular nucleolar formation at the four-cell stage. Production of porcine embryos under in vitro conditions by IVF, PA, or SCNT is associated with altered chromatin remodeling, delayed nucleolar formation, and poorly defined lineage segregation at the blastocyst stage, which in turn may impair their developmental capacity.
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Affiliation(s)
- Rahul S Deshmukh
- Department of Basic Animal and Veterinary Sciences, Faculty of Life Sciences, University of Copenhagen, Denmark
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Expression of pluripotency master regulators during two key developmental transitions: EGA and early lineage specification in the bovine embryo. PLoS One 2012; 7:e34110. [PMID: 22479535 PMCID: PMC3315523 DOI: 10.1371/journal.pone.0034110] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2011] [Accepted: 02/24/2012] [Indexed: 12/22/2022] Open
Abstract
Pluripotency genes are implicated in mouse embryonic genome activation (EGA) and pluripotent lineage specification. Moreover, their expression levels have been correlated with embryonic term development. In bovine, however, little information is available about dynamics of pluripotency genes during these processes. In this study, we charted quantitative and/or qualitative spatio-temporal expression patterns of transcripts and proteins of pluripotency genes (OCT4, SOX2 and NANOG) and mRNA levels of some of their downstream targets in bovine oocytes and early embryos. Furthermore, to correlate expression patterns of these genes with term developmental potential, we used cloned embryos, having similar in vitro but different full term development rates. Our findings affirm: firstly, the core triad of pluripotency genes is probably not implicated in bovine EGA since their proteins were not detected during pre-EGA phase, despite the transcripts for OCT4 and SOX2 were present. Secondly, an earlier ICM specification of transcripts and proteins of SOX2 and NANOG makes them pertinent candidates of bovine pluripotent lineage specification than OCT4. Thirdly, embryos with low term development potential have higher transcription rates; nevertheless, precarious balance between pluripotency genes is maintained. This balance presages normal in vitro development but, probably higher transcription rate disturbs it at later stage that abrogates term development.
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Garg S, Dutta R, Malakar D, Jena M, Kumar D, Sahu S, Prakash B. Cardiomyocytes rhythmically beating generated from goat embryonic stem cell. Theriogenology 2012; 77:829-39. [DOI: 10.1016/j.theriogenology.2011.05.029] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2011] [Revised: 05/10/2011] [Accepted: 05/13/2011] [Indexed: 12/18/2022]
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Dev K, Giri SK, Kumar A, Yadav A, Singh B, Gautam SK. Derivation, Characterization and Differentiation of Buffalo (Bubalus bubalis) Amniotic Fluid Derived Stem Cells. Reprod Domest Anim 2011; 47:704-11. [DOI: 10.1111/j.1439-0531.2011.01947.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Marandel L, Labbe C, Bobe J, Le Bail PY. nanog 5'-upstream sequence, DNA methylation, and expression in gametes and early embryo reveal striking differences between teleosts and mammals. Gene 2011; 492:130-7. [PMID: 22037485 DOI: 10.1016/j.gene.2011.10.037] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2011] [Revised: 10/11/2011] [Accepted: 10/12/2011] [Indexed: 01/14/2023]
Abstract
The nanog gene plays a major role in vertebrate development and was only recently discovered in teleosts. In order to gain new insight into its regulation in gametes and early embryo in teleost fish, the present study aimed at characterizing nanog upstream sequence features and DNA methylation, as well as early embryonic expression pattern in a Cyprinid fish, the goldfish. Using an in silico approach, we were able to demonstrate that despite the existence of conserved regulatory motifs in the promoter region of the nanog gene, specific features known to play a major role in the regulation of Nanog in mammals were missing in teleosts. The analysis of CpG sites in the upstream region of the nanog genes in goldfish revealed a significant DNA methylation state in oocytes while a hypomethylated state was observed in sperm. Using both quantitative PCR and whole mount in situ hybridization, we were able to clearly demonstrate the maternal inheritance of the nanog transcript in goldfish. Corresponding mRNA levels subsequently decreased during early gastrulation. Together, our results reveal striking differences in expression and DNA methylation patterns in gametes and during early development and in upstream region features between teleosts and mammals that are consistent with the hypothesis of a rapid evolution of the Nanog gene in vertebrates, at least in some lineages.
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Affiliation(s)
- Lucie Marandel
- INRA, UR1037 SCRIBE, IFR140, Biogenouest, Campus de Beaulieu, F-35042 Rennes, France.
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Cheng X, Meng S, Deng J, Lai W, Wang H. Identification and characterization of the Oct4 extended transcriptional regulatory region in Guanzhong dairy goat. Genome 2011; 54:812-8. [PMID: 21929360 DOI: 10.1139/g11-047] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The octamer-binding transcription factor 4 gene (Oct4) plays a critical role in maintaining pluripotency during early mammalian embryonic development and self-renewal of embryonic stem (ES) cells. In this study, we cloned the Oct4 cDNA and 2.8-kb regulatory region upstream of the start codon in Guanzhong dairy goat ( Capra hircus ). The comparative sequence analysis of Oct4 cDNA showed that it was highly conserved among six mammalian species. The goat Oct4 5' regulatory regions were homologous to the corresponding regions of Oct4 in other species and were functional in directing the expression of luciferase in mouse P19 embryonic carcinoma cells and mouse J1 ES cells. Furthermore, the methylation levels in the goat Oct4 minimal promoter and proximal enhancer in the fetal genital ridge were lower than those in the heart. Additionally, two processed pseudogenes that shared high homology with goat Oct4 cDNA were identified and characterized.
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Affiliation(s)
- Xiang Cheng
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China
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Nowak-Imialek M, Kues W, Carnwath JW, Niemann H. Pluripotent stem cells and reprogrammed cells in farm animals. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2011; 17:474-497. [PMID: 21682936 DOI: 10.1017/s1431927611000080] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Pluripotent cells are unique because of their ability to differentiate into the cell lineages forming the entire organism. True pluripotent stem cells with germ line contribution have been reported for mice and rats. Human pluripotent cells share numerous features of pluripotentiality, but confirmation of their in vivo capacity for germ line contribution is impossible due to ethical and legal restrictions. Progress toward derivation of embryonic stem cells from domestic species has been made, but the derived cells were not able to produce germ line chimeras and thus are termed embryonic stem-like cells. However, domestic animals, in particular the domestic pig (Sus scrofa), are excellent large animals models, in which the clinical potential of stem cell therapies can be studied. Reprogramming technologies for somatic cells, including somatic cell nuclear transfer, cell fusion, in vitro culture in the presence of cell extracts, in vitro conversion of adult unipotent spermatogonial stem cells into germ line derived pluripotent stem cells, and transduction with reprogramming factors have been developed with the goal of obtaining pluripotent, germ line competent stem cells from domestic animals. This review summarizes the present state of the art in the derivation and maintenance of pluripotent stem cells in domestic animals.
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Affiliation(s)
- Monika Nowak-Imialek
- Institute of Farm Animal Genetics (FLI), Biotechnology, Mariensee, 31535 Neustadt, Germany
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47
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Yang QE, Fields SD, Zhang K, Ozawa M, Johnson SE, Ealy AD. Fibroblast growth factor 2 promotes primitive endoderm development in bovine blastocyst outgrowths. Biol Reprod 2011; 85:946-53. [PMID: 21778141 DOI: 10.1095/biolreprod.111.093203] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Primitive endoderm (PE) is the second extraembryonic tissue to form during embryogenesis in mammals. The PE develops from pluripotent cells of the blastocyst inner cell mass. Experimental results described herein provide evidence that FGF2 stimulates PE development during bovine blastocyst development in vitro. Bovine blastocysts were cultured individually on a feeder layer-free, Matrigel-coated surface in the presence or absence of FGF2. A majority of blastocysts cultures formed outgrowths (76.8%) and the rate of outgrowth formation was not affected by FGF2 supplementation. However, supplementation with FGF2 increased the incidence of PE outgrowths on Days 13 and 15 after in vitro fertilization. Presumptive PE cultures contained cells with a phenotype distinct from trophectoderm (TE). Cell identity was validated by expression of GATA4 and GATA6 mRNA and transferrin protein, all markers of the PE lineage. Expression of GATA4 occurred coincident with blastocyst expansion and hatching. These cells did not express IFNT and CDX2 (TE lineage markers). Profiles of FGF receptor (FGFR) isoforms were distinct between PE and TE cultures. Specifically, FGFR1b and FGFR1c were the predominant FGFR transcripts in PE whereas FGFR2b transcripts were abundant in TE. Supplementation with FGF2 increased the mitotic index of PE but not TE. Moreover, FGF signaling appears important for initiation of PE formation in blastocysts, presumably by lineage committal from NANOG-positive epiblast cells, because chemical disruption of FGFR kinase activity with PD173074 reduces GATA4 expression and increases NANOG expression. Collectively, these results indicate that FGF2 and potentially other FGFs specify PE formation and mediate PE proliferation during early pregnancy in cattle.
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Affiliation(s)
- Qi En Yang
- Department of Animal Sciences, University of Florida, Gainesville, Florida 32611-0910, USA
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Pillarisetti A, Desai JP, Ladjal H, Schiffmacher A, Ferreira A, Keefer CL. Mechanical phenotyping of mouse embryonic stem cells: increase in stiffness with differentiation. Cell Reprogram 2011; 13:371-80. [PMID: 21728815 DOI: 10.1089/cell.2011.0028] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Atomic force microscopy (AFM) has emerged as a promising tool to characterize the mechanical properties of biological materials and cells. In our studies, undifferentiated and early differentiating mouse embryonic stem cells (mESCs) were assessed individually using an AFM system to determine if we could detect changes in their mechanical properties by surface probing. Probes with pyramidal and spherical tips were assessed, as were different analytical models for evaluating the data. The combination of AFM probing with a spherical tip and analysis using the Hertz model provided the best fit to the experimental data obtained and thus provided the best approximation of the elastic modulus. Our results showed that after only 6 days of differentiation, individual cell stiffness increased significantly with early differentiating mESCs having an elastic modulus two- to threefold higher than undifferentiated mESCs, regardless of cell line (R1 or D3 mESCs) or treatment. Single-touch (indentation) probing of individual cells is minimally invasive compared to other techniques. Therefore, this method of mechanical phenotyping should prove to be a valuable tool in the development of improved methods of identification and targeted cellular differentiation of embryonic, adult, and induced-pluripotent stem cells for therapeutic and diagnostic purposes.
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Affiliation(s)
- Anand Pillarisetti
- Robotics, Automation, Medical Systems (RAMS) Laboratory, University of Maryland, College Park, Maryland, USA
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Byskov AG, Høyer PE, Yding Andersen C, Kristensen SG, Jespersen A, Møllgård K. No evidence for the presence of oogonia in the human ovary after their final clearance during the first two years of life. Hum Reprod 2011; 26:2129-39. [PMID: 21572085 DOI: 10.1093/humrep/der145] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Conflicting results of studies on mouse and human have either verified or refuted the presence of oogonia/primordial germ cells in the post-natal ovary. The aim of this study was to trace whether oogonia recognized by immunohistochemical methods in the first trimester human ovary were present also in peri- and post-natal ovaries. METHODS For this study, 82 human ovaries were collected: 25 from embryos from 5 to 10 weeks post conception (wpc), 2 at 18 wpc, 32 from 32 wpc to 2 years and 23 from 2 to 32 years. Of these, 80 ovaries were fixed and paraffin-embedded and 2 (8 year-old) ovaries were processed for plastic sections. Serial sections were prepared for immunohistochemical detection of markers for oogonia: tyrosine kinase receptor for stem cell factor (SCF)(C-KIT), stage-specific embryonic antigen-4 (SSEA4), homeobox gene transcription factor (NANOG), octamer binding transcription factor 4 (OCT4) and melanoma antigen-4 (Mage-A4), while noting that C-KIT also stains diplotene oocytes. RESULTS Almost all oogonia exclusively stained for SSEA4, NANOG, OCT4 and C-KIT, whereas MAGE-A4 only stained a small fraction. At birth only a few oogonia were stained. These disappeared before 2 years, leaving only diplotene oocytes stained for C-KIT. From 18 wpc to 2 years, the medulla contained conglomerates of healthy and degenerating oogonia and small follicles, waste baskets (WBs) and oogonia enclosed in growing follicles (FWB). Medulla of older ovaries contained groups of primordial, healthy follicles. CONCLUSIONS We found no evidence for the presence of oogonia in the human ovary after their final clearing during the first 2 years. We suggest that perinatal medullary WB and FWB give rise to the groups of small, healthy follicles in the medulla.
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Affiliation(s)
- A G Byskov
- Laboratory of Reproductive Biology, Section 5712, University Hospital of Copenhagen, Rigshospitalet, Section 5712, Blegdamsvej 9, DK-2100 Copenhagen, Denmark.
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Anand T, Kumar D, Singh MK, Shah RA, Chauhan MS, Manik RS, Singla SK, Palta P. Buffalo (Bubalus bubalis) embryonic stem cell-like cells and preimplantation embryos exhibit comparable expression of pluripotency-related antigens. Reprod Domest Anim 2011; 46:50-8. [PMID: 20042025 DOI: 10.1111/j.1439-0531.2009.01564.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
In this study, inner cell mass (ICM) cells were isolated from in vitro produced buffalo blastocysts and were cultured on mitomycin-C treated buffalo foetal fibroblast feeder layer for producing embryonic stem (ES) cells. Among different sources (hatched vs expanded blastocysts) or methods (enzymatic vs mechanical), mechanical isolation of ICM from hatched blastocysts resulted in the highest primary colony formation rate and the maximum passage number up to which ES cells survived. Putative ES cells expressed alkaline phosphatase and exhibited a normal karyotype up to passage 7. Putative ES cells and embryos at 2- to 4-cell, 8- to 16-cell, morula and blastocyst stages strongly expressed stage-specific embryonic antigen (SSEA)-4 but lacked expressions of SSEA-1 and SSEA-3. Putative ES cells also expressed tumour rejection antigen (TRA)-1-60, TRA-1-81 and Oct4. Whereas in all early embryonic stages, TRA-1-60 was observed only in the periplasmic space, and TRA-1-81 expression was observed as small spots at a few places inside the embryos, both these markers were expressed by ICM. Oct4 expression, which was observed at all the embryonic stages and also in the trophectoderm, was the strongest in the ICM. Buffalo putative ES cells possess a unique pluripotency-related surface antigen phenotype, which resembles that of the ICM.
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Affiliation(s)
- T Anand
- Animal Biotechnology Center, National Dairy Research Institute, Karnal-132001, India
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