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Oliveira I, Fisch J, Gomes J, Lopes RFF, Oliveira ATDD. Selection of Rattus norvegicus cumulus-oocyte complex for vitrification by brilliant cresyl blue. ZYGOTE 2023; 31:483-490. [PMID: 37449710 DOI: 10.1017/s0967199423000394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/18/2023]
Abstract
The influence of the method of evaluating developmentally competent oocytes on their viability after cryopreservation still needs to be better understood. The objective of this study was to determine the cleavage and embryo developmental rates after parthenogenetic activation of cumulus-oocyte complexes (COCs) selected by different concentrations of brilliant cresyl blue (BCB) and cryopreservation. In the first experiment, COCs were separated into groups and incubated for 1 h in medium containing BCB (13 μM, 16 μM, or 20 μM). The control group was not exposed to BCB staining. In the second experiment, COCs were divided into four groups: 13 μM BCB(+), 13 μM BCB(-), fresh control (selected by morphologic observation and immediately in vitro matured) and vitrified control (selected by morphologic evaluation, vitrified, and in vitro matured). In the first experiment, the 13 μM BCB group displayed greater development rates at the morula stage (65.45%, 36/55) when compared with the other groups. In the second experiment, cleavage (47.05%, 72/153) and morula development (33.55%, 51/153) of the control group of fresh COCs were increased compared with the other groups. However, when comparing morula rates between vitrified COC control and BCB(+) groups, the BCB(+) group had better results (19.23%, 5/26 and 64.7%, 11/17, respectively). Our best result in rat COC selection by BCB staining was obtained using a concentration of 13 μM. This selection could be a valuable tool to improve vitrification outcomes, as observed by the BCB(+) group that demonstrated better results compared with the vitrified COC control.
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Affiliation(s)
- Iaskara Oliveira
- PPG - Ciências da Saúde - Universidade Federal de Ciências da Saúde de Porto Alegre -UFCSPA, Porto Alegre, RS, Brazil
| | - Joana Fisch
- PPG - Ciências da Saúde - Universidade Federal de Ciências da Saúde de Porto Alegre -UFCSPA, Porto Alegre, RS, Brazil
| | - Juliana Gomes
- Laboratório de Biotecnologia Animal Aplicada- Universidade Federal do Rio Grande do Sul-UFRGS, Porto Alegre, RS, Brazil
| | - Rui Fernando Felix Lopes
- Laboratório de Biotecnologia Animal Aplicada- Universidade Federal do Rio Grande do Sul-UFRGS, Porto Alegre, RS, Brazil
| | - Alexandre Tavares Duarte de Oliveira
- PPG - Ciências da Saúde - Universidade Federal de Ciências da Saúde de Porto Alegre -UFCSPA, Porto Alegre, RS, Brazil
- Laboratório de Biotecnologia Animal Aplicada- Universidade Federal do Rio Grande do Sul-UFRGS, Porto Alegre, RS, Brazil
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Abdoon ASS, Kandil OM, Zeng SM. Intrafollicular spontaneous parthenogenetic development of dromedary camel oocytes. Mol Reprod Dev 2020; 87:704-710. [PMID: 32415813 DOI: 10.1002/mrd.23350] [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: 12/07/2019] [Accepted: 05/04/2020] [Indexed: 11/08/2022]
Abstract
Dromedary camel oocytes are unique in their capability for intrafollicular and in vitro spontaneous parthenogenetic activation (SPA) and development. This study was designed for (a) observing the incidence of SPA and development of dromedary camel oocytes retrieved from ovaries; (b) assessing intrafollicular development of dromedary camel oocytes using histological examination; (c) evaluating the abilities of dromedary camel oocytes to mature, SPA, and develop in vitro; and (d) identifying the transcript abundance of Cdx2 messenger RNA (mRNA) expression in different stages of SPA and developed camel embryos. The results revealed that 2.33% of oocytes retrieved from dromedary camel ovaries were SPA and developed to blastocyst stage. Serial sections of dromedary camel ovaries also demonstrated the presence of 1.4 SPA and parthenotes per ovary, which included from two-cell to the blastocysts with demarcated trophectoderm and inner cell mass layers. A total of 2.6% in vitro matured dromedary camel oocytes developed into morulae. The SPA and developed dromedary embryos expressed transcript abundance for Cdx2 mRNA with the highest (p < .05) at the blastocyst. The present work determines for the first time the intrafollicular oocytes from the dromedary camel display SPA, and the parthenotes can develop into blastocysts and expressing Cdx2 mRNA.
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Affiliation(s)
- Ahmed S S Abdoon
- Department of Animal Reproduction and Artificial Insemination, Veterinary Research Division, National Research Centre, Cairo, Egypt
| | - Omaima M Kandil
- Department of Animal Reproduction and Artificial Insemination, Veterinary Research Division, National Research Centre, Cairo, Egypt
| | - Shen-Ming Zeng
- National Engineering Laboratory for Animal Breeding, Key Laboratory of Animal Genetics, Breeding and Reproduction of the Ministry of Agriculture, College of Animal Science and Technology, China Agricultural University, Beijing, China
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Abortive Spontaneous Egg Activation: An Emerging Biological Threat for the Existence of Mammals. Cell Reprogram 2017; 19:145-149. [DOI: 10.1089/cell.2016.0052] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
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Prasad S, Tiwari M, Koch B, Chaube SK. Morphological, cellular and molecular changes during postovulatory egg aging in mammals. J Biomed Sci 2015; 22:36. [PMID: 25994054 PMCID: PMC4440248 DOI: 10.1186/s12929-015-0143-1] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2015] [Accepted: 05/01/2015] [Indexed: 11/29/2022] Open
Abstract
Postovulatory aging is associated with several morphological, cellular and molecular changes that deteriorate egg quality either by inducing abortive spontaneous egg activation (SEA) or by egg apoptosis. The reduced egg quality results in poor fertilization rate, embryo quality and reproductive outcome. Although postovulatory aging-induced abortive SEA has been reported in several mammalian species, the molecular mechanism(s) underlying this process remains to be elucidated. The postovulatory aging-induced morphological and cellular changes are characterized by partial cortical granules exocytosis, zona pellucida hardening, exit from metaphase-II (M-II)arrest and initiation of extrusion of second polar body in aged eggs. The molecular changes include reduction of adenosine 3',5'- cyclic monophosphate (cAMP) level, increase of reactive oxygen species (ROS) and thereby cytosolic free calcium (Ca2+) level. Increased levels of cAMP and/or ROS trigger accumulation of Thr-14/Tyr-15 phosphorylated cyclin-dependent kinase 1 (Cdk1) on one hand and degradation of cyclin B1 through ubiquitin-mediated proteolysis on the other hand to destabilize maturation promoting factor (MPF). The destabilized MPF triggers postovulatory aging-induced abortive SEA and limits various assisted reproductive technologies (ARTs) outcome in several mammalian species. Use of certain drugs that can either increase cAMP or reduce ROS level would prevent postovulatory aging-induced deterioration in egg quality so that more number of good quality eggs can be made available to improve ART outcome in mammals including human.
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Affiliation(s)
- Shilpa Prasad
- Cell Physiology Laboratory, Biochemistry Unit, Department of Zoology, Banaras Hindu University, Varanasi, 221005, UP, India.
| | - Meenakshi Tiwari
- Cell Physiology Laboratory, Biochemistry Unit, Department of Zoology, Banaras Hindu University, Varanasi, 221005, UP, India.
| | - Biplob Koch
- Genotoxicology and Cancer Biology Laboratory, Department of Zoology, Banaras Hindu University, Varanasi, 221005, UP, India.
| | - Shail K Chaube
- Cell Physiology Laboratory, Biochemistry Unit, Department of Zoology, Banaras Hindu University, Varanasi, 221005, UP, India.
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Prasad S, Tiwari M, Tripathi A, Pandey AN, Chaube SK. Changes in signal molecules and maturation promoting factor levels associate with spontaneous resumption of meiosis in rat oocytes. Cell Biol Int 2015; 39:759-69. [PMID: 25604742 DOI: 10.1002/cbin.10444] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Accepted: 01/13/2015] [Indexed: 11/11/2022]
Abstract
The present study was aimed to find out changes in signal molecules and maturation promoting factor (MPF) levels during meiotic cell cycle progression from diplotene and metaphase-II (M-II) arrest, a period during which oocyte achieves meiotic competency. Data suggest that high levels of adenosine 3'-5'-cyclic monophosphate (cAMP), guanosine 3'-5'-cyclic monophosphate (cGMP), and nitric oxide (NO) are associated with diplotene arrest, while reduction in their levels correlates with reduced MPF level and meiotic resumption from diplotene arrest. On the other hand, increased intracellular NO, calcium (Ca(2+) ) as well as hydrogen peroxide (H2 O2 ) levels correlate with decreased cAMP, Thr-161 phosphorylated cyclin-dependent kinase-1 (Cdk1) as well as cyclin B1 levels. The decreased Thr-161 phosphorylated Cdk1 and cyclin B1 level reduce MPF level leading to exit from M-II arrest in oocytes cultured in vitro. These data suggest that the decrease of cAMP level and increase of cytosolic free Ca(2+) as well as H2 O2 levels associate with the reduced MPF level and meiotic resumption from diplotene arrest. On the other hand, increase of NO, cGMP, Ca(2+) as well as H2 O2 levels are associated with reduced MPF and spontaneous exit from M-II arrest in rat oocytes cultured in vitro.
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Affiliation(s)
- Shilpa Prasad
- Cell Physiology Laboratory, Biochemistry Unit, Department of Zoology, Banaras Hindu University, Varanasi, 221005, India
| | - Meenakshi Tiwari
- Cell Physiology Laboratory, Biochemistry Unit, Department of Zoology, Banaras Hindu University, Varanasi, 221005, India
| | - Anima Tripathi
- Cell Physiology Laboratory, Biochemistry Unit, Department of Zoology, Banaras Hindu University, Varanasi, 221005, India
| | - Ashutosh N Pandey
- Cell Physiology Laboratory, Biochemistry Unit, Department of Zoology, Banaras Hindu University, Varanasi, 221005, India
| | - Shail K Chaube
- Cell Physiology Laboratory, Biochemistry Unit, Department of Zoology, Banaras Hindu University, Varanasi, 221005, India
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Sato KI. Transmembrane signal transduction in oocyte maturation and fertilization: focusing on Xenopus laevis as a model animal. Int J Mol Sci 2014; 16:114-34. [PMID: 25546390 PMCID: PMC4307238 DOI: 10.3390/ijms16010114] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Accepted: 12/15/2014] [Indexed: 11/16/2022] Open
Abstract
Fertilization is a cell biological phenomenon of crucial importance for the birth of new life in a variety of multicellular and sexual reproduction species such as algae, animal and plants. Fertilization involves a sequence of events, in which the female gamete "egg" and the male gamete "spermatozoon (sperm)" develop, acquire their functions, meet and fuse with each other, to initiate embryonic and zygotic development. Here, it will be briefly reviewed how oocyte cytoplasmic components are orchestrated to undergo hormone-induced oocyte maturation and sperm-induced activation of development. I then review how sperm-egg membrane interaction/fusion and activation of development in the fertilized egg are accomplished and regulated through egg coat- or egg plasma membrane-associated components, highlighting recent findings and future directions in the studies using Xenopus laevis as a model experimental animal.
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Affiliation(s)
- Ken-ichi Sato
- Laboratory of Cell Signaling and Development, Department of Molecular Biosciences, Faculty of Life Sciences, Kyoto Sangyo University, Kamigamo-motoyama, Kita-ku, Kyoto 603-8555, Japan.
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Li S, Kang JD, Jin JX, Hong Y, Zhu HY, Jin L, Gao QS, Yan CG, Cui CD, Li WX, Yin XJ. Effect of demecolcine-assisted enucleation on the MPF level and cyclin B1 distribution in porcine oocytes. PLoS One 2014; 9:e91483. [PMID: 24626152 PMCID: PMC3953396 DOI: 10.1371/journal.pone.0091483] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Accepted: 02/11/2014] [Indexed: 11/19/2022] Open
Abstract
Demecolcine (DEM) treatment of oocytes induces formation of a membrane protrusion containing a mass of condensed maternal chromosomes, which can be removed with minimal damage prior to somatic cell nuclear transfer (SCNT). However, the effect of this method on the distribution of maturation-promoting factor (MPF) in porcine oocytes has not been reported. Here, the level of MPF and the distribution of cyclin B1 were assessed in porcine oocytes following DEM treatment. In addition, the efficiencies of DEM-assisted and mechanical enucleation were compared, as were the development (in vitro and in vivo) of these oocytes following SCNT. MPF was uniformly distributed in oocytes that had been treated with 0.4 μg/ml DEM for 1 h. Immunofluorescence microscopy showed that in untreated oocytes, cyclin B1, the regulatory subunit of MPF, accumulated around the spindle, and was lowly detected in the cytoplasm. DEM treatment disrupted spindle microtubules, induced chromosome condensation, and reduced the level of cyclin B1 in the nuclear region. Cyclin B1 was uniformly distributed in DEM-treated oocytes and the level of MPF was increased. The potential of embryos generated from DEM-treated oocytes to develop in vivo was significantly greater than that of embryos generated from mechanically enucleated oocytes. This is the first study to report the effects of DEM-assisted enucleation of porcine oocytes on the distribution of cyclin B1. MPF in mature oocytes is important for the development of reconstructed embryos and for efficient SCNT.
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Affiliation(s)
- Suo Li
- Department of Animal Science, College of Agriculture, Yanbian University, Yanji, China
| | - Jin-Dan Kang
- Department of Animal Science, College of Agriculture, Yanbian University, Yanji, China
| | - Jun-Xue Jin
- Department of Animal Science, College of Agriculture, Yanbian University, Yanji, China
| | - Yu Hong
- Department of Animal Science, College of Agriculture, Yanbian University, Yanji, China
| | - Hai-Ying Zhu
- Department of Animal Science, College of Agriculture, Yanbian University, Yanji, China
| | - Long Jin
- Department of Animal Science, College of Agriculture, Yanbian University, Yanji, China
| | - Qing-Shan Gao
- Department of Animal Science, College of Agriculture, Yanbian University, Yanji, China
| | - Chang-Guo Yan
- Department of Animal Science, College of Agriculture, Yanbian University, Yanji, China
| | - Cheng-Du Cui
- Department of veterinary medicine, College of Agriculture, Yanbian University, Yanji, China
| | - Wen-Xue Li
- Department of veterinary medicine, College of Agriculture, Yanbian University, Yanji, China
| | - Xi-Jun Yin
- Department of Animal Science, College of Agriculture, Yanbian University, Yanji, China
- * E-mail:
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Premkumar KV, Chaube SK. An insufficient increase of cytosolic free calcium level results postovulatory aging-induced abortive spontaneous egg activation in rat. J Assist Reprod Genet 2012; 30:117-23. [PMID: 23239129 DOI: 10.1007/s10815-012-9908-6] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2012] [Accepted: 11/29/2012] [Indexed: 11/27/2022] Open
Abstract
PURPOSE The present study was aimed to find out whether postovulatory aging-induced abortive spontaneous egg activation (SEA) is due to insufficient increase of cytosolic free Ca(2+) level. METHODS Immature female rats (22-24 days old) were subjected to superovulation induction protocol. Eggs were collected 14, 17 and 19 h post-hCG surge to induce in vivo egg aging. The eggs were collected 14 h post-hCG surge and cultured in vitro for 3, 5 and 7 h to induce in vitro egg aging. The morphological changes, rate of abortive SEA, chromosomal status and cytosolic free Ca(2+) levels were analyzed. RESULTS Postovulatory aging induced morphological features characteristics of abortive SEA in a time-dependent manner in vivo as well as in vitro. The extracellular Ca(2+) increased rate of abortive SEA during initial period of culture, while co-addition of a nifedipine (L-type Ca(2+) channel blocker) protected against postovulatory aging-induced abortive SEA. However, CI induced morphological features characteristics of egg activation (EA) in a dose-dependent manner. As compare to control, an increase of cytosolic free Ca(2+) level (1.42 times) induced abortive SEA, while further increase of cytosolic free Ca(2+) level (2.55 times) induced EA. CONCLUSION Our results show that an insufficient cytosolic free Ca(2+) level is associated with postovulatory aging -induced abortive SEA, while furthermore increase is required to induce EA in rat.
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Affiliation(s)
- Karuppanan V Premkumar
- Cell Physiology Laboratory, Department of Zoology, Banaras Hindu University, Varanasi, 221005, India
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Chebotareva T, Taylor J, Mullins JJ, Wilmut I. Rat eggs cannot wait: Spontaneous exit from meiotic metaphase-II arrest. Mol Reprod Dev 2011; 78:795-807. [PMID: 21910153 DOI: 10.1002/mrd.21385] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2011] [Accepted: 08/15/2011] [Indexed: 11/06/2022]
Abstract
Mammalian eggs await fertilisation while arrested at the second metaphase stage of meiotic division. A network of signalling pathways enables the establishment and maintenance of this metaphase-II arrest. In the absence of fertilisation, mammalian eggs can spontaneously exit metaphase II when parthenogenetically stimulated, or sometimes without any obvious stimulation. Ovulated rat eggs abortively release from metaphase-II arrest once removed from egg donors. Spontaneously activated rat eggs extrude the second polar body and proceed to the so-called metaphase III-'like' stage, with clumps of condensed chromatin scattered in the egg cytoplasm. It is still unclear what makes rat eggs susceptible to spontaneous activation; however, a vague picture of the signalling pathways involved in the process of spontaneous activation is beginning to emerge. Such cell cycle instability is one of the major reasons why it is more difficult to establish nuclear transfer in the rat. This review examines the known predisposing factors and biochemical mechanisms involved in spontaneous activation. The strategies used to prevent spontaneous metaphase-II release in rat eggs will also be discussed.
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Affiliation(s)
- Tatiana Chebotareva
- MRC Centre for Regenerative Medicine, Edinburgh University, Edinburgh, Scotland, UK.
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Tripathi A, Kumar KVP, Chaube SK. Meiotic cell cycle arrest in mammalian oocytes. J Cell Physiol 2010; 223:592-600. [PMID: 20232297 DOI: 10.1002/jcp.22108] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Meiotic cell cycle in mammalian oocytes is a dynamic process that involves several stop/go channels. The cell cycle arrest in oocyte occurs at various stages such as diplotene, metaphase-I (M-I), metaphase-II (M-II), and so called metaphase-like arrest (M-III). Leutinizing hormone surge induces meiotic resumption from diplotene arrest in follicular microenvironment by overriding several factors responsible for the maintenance of meiotic arrest. The inhibitory factors are synthesized in oocyte or in the associated follicular somatic cells and transferred to the oocyte. The major factors include hypoxanthine, cyclic adenosine 3', 5'-monophosphate, cyclic guanosine 3', 5'-monophosphate, reactive oxygen species, protein kinase A, and protein kinase C. In the presence of active protein kinases, epidermal-like growth factors are produced that activate mitogen-activated protein kinase in cumulus granulosa cells. The maturation promoting factor, cytostatic factors, and spindle assembly checkpoint proteins are also involved in that maintenance of arrest at various stages of meiotic cell cycle in mammalian oocytes. In this review, we briefly summarize the role of these factors in the maintenance of meiotic cell cycle arrest in mammalian oocytes.
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Affiliation(s)
- Anima Tripathi
- Department of Zoology, Banaras Hindu University, Varanasi, India
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Mizumoto S, Kato Y, Tsunoda Y. The Developmental Potential of Parthenogenetic and Somatic Cell Nuclear-Transferred Rat Oocytes In Vitro. CLONING AND STEM CELLS 2008; 10:453-9. [DOI: 10.1089/clo.2008.0017] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Shigetoshi Mizumoto
- Laboratory of Animal Reproduction, College of Agriculture, Kinki University, Nara, 631-8505, Japan
| | - Yoko Kato
- Laboratory of Animal Reproduction, College of Agriculture, Kinki University, Nara, 631-8505, Japan
| | - Yukio Tsunoda
- Laboratory of Animal Reproduction, College of Agriculture, Kinki University, Nara, 631-8505, Japan
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Lan GC, Wu YG, Han D, Ge L, Liu Y, Wang HL, Wang JZ, Tan JH. Demecolcine-assisted enucleation of goat oocytes: protocol optimization, mechanism investigation, and application to improve the developmental potential of cloned embryos. CLONING AND STEM CELLS 2008; 10:189-202. [PMID: 18373477 DOI: 10.1089/clo.2007.0088] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Although demecolcine-assisted enucleation has been performed successfully in porcine and cattle, the mechanism and protocol optimization of chemically assisted enucleation need further investigation. The present study optimized the protocol for goat oocyte enucleation and demonstrated that a 30-min treatment with 0.8 ng/mL demecolcine-induced cytoplasmic protrusions in over 90% of the oocytes. Rates of enucleation, cell fusion, and blastocyst formation were significantly higher after demecolcine-assisted than after blind aspiration enucleation, although differences in rates of live births remain to be unequivocally determined between the two treatments. The ability to form protrusions decreased significantly as spindles became less organized in aged oocytes and the oocytes with a poor cumulus expansion. More than 93% of the demecolcine-induced protrusions persisted for 2 h in the absence of cytochalasin B (CB) but most disappeared within 30 min of CB treatment. The spindle disintegrated, an actin-rich ring formed around the chromosome mass and the MAP kinase activity increased significantly after demecolcine treatment. When oocytes with induced protrusions were treated with CB, however, the contractile ring disappeared, the spindle reintegrated, and both MPF and MAP kinase activities decreased significantly. It is concluded that (1) cytoplasmic protrusions can be induced in goat oocytes with a very low concentration of demecolcine; (2) oocyte selection and enucleation can be achieved simultaneously with demecolcine treatment; and (3) an interactive effect between the MAP kinase, MPF, microfilaments and microtubules might be implicated in the control of cytoplasmic protrusion formation after demecolcine treatment.
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Affiliation(s)
- Guo-Cheng Lan
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai-an City 271018, People's Republic of China
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