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Angel-Velez D, Meese T, Hedia M, Fernandez-Montoro A, De Coster T, Pascottini OB, Van Nieuwerburgh F, Govaere J, Van Soom A, Pavani K, Smits K. Transcriptomics Reveal Molecular Differences in Equine Oocytes Vitrified before and after In Vitro Maturation. Int J Mol Sci 2023; 24:ijms24086915. [PMID: 37108081 PMCID: PMC10138936 DOI: 10.3390/ijms24086915] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/27/2023] [Accepted: 04/04/2023] [Indexed: 04/29/2023] Open
Abstract
In the last decade, in vitro embryo production in horses has become an established clinical practice, but blastocyst rates from vitrified equine oocytes remain low. Cryopreservation impairs the oocyte developmental potential, which may be reflected in the messenger RNA (mRNA) profile. Therefore, this study aimed to compare the transcriptome profiles of metaphase II equine oocytes vitrified before and after in vitro maturation. To do so, three groups were analyzed with RNA sequencing: (1) fresh in vitro matured oocytes as a control (FR), (2) oocytes vitrified after in vitro maturation (VMAT), and (3) oocytes vitrified immature, warmed, and in vitro matured (VIM). In comparison with fresh oocytes, VIM resulted in 46 differentially expressed (DE) genes (14 upregulated and 32 downregulated), while VMAT showed 36 DE genes (18 in each category). A comparison of VIM vs. VMAT resulted in 44 DE genes (20 upregulated and 24 downregulated). Pathway analyses highlighted cytoskeleton, spindle formation, and calcium and cation ion transport and homeostasis as the main affected pathways in vitrified oocytes. The vitrification of in vitro matured oocytes presented subtle advantages in terms of the mRNA profile over the vitrification of immature oocytes. Therefore, this study provides a new perspective for understanding the impact of vitrification on equine oocytes and can be the basis for further improvements in the efficiency of equine oocyte vitrification.
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Affiliation(s)
- Daniel Angel-Velez
- Department of Internal Medicine, Reproduction and Population Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
- Research Group in Animal Sciences-INCA-CES, Universidad CES, Medellin 050021, Colombia
| | - Tim Meese
- Laboratory for Pharmaceutical Biotechnology, Faculty of Pharmaceutical Science, Ghent University, 9000 Ghent, Belgium
| | - Mohamed Hedia
- Department of Internal Medicine, Reproduction and Population Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
- Department of Theriogenology, Faculty of Veterinary Medicine, Cairo University, Giza 12211, Egypt
| | - Andrea Fernandez-Montoro
- Department of Internal Medicine, Reproduction and Population Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
| | - Tine De Coster
- Department of Internal Medicine, Reproduction and Population Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
| | - Osvaldo Bogado Pascottini
- Department of Internal Medicine, Reproduction and Population Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
| | - Filip Van Nieuwerburgh
- Laboratory for Pharmaceutical Biotechnology, Faculty of Pharmaceutical Science, Ghent University, 9000 Ghent, Belgium
| | - Jan Govaere
- Department of Internal Medicine, Reproduction and Population Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
| | - Ann Van Soom
- Department of Internal Medicine, Reproduction and Population Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
| | - Krishna Pavani
- Department of Internal Medicine, Reproduction and Population Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
- Department for Reproductive Medicine, Ghent University Hospital, Corneel Heymanslaan 10, 9000 Gent, Belgium
| | - Katrien Smits
- Department of Internal Medicine, Reproduction and Population Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
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Abdul Rahman NS, Mohamed Noor Khan NA, Eshak Z, Sarbandi MS, Mohammad Kamal AA, Abd Malek M, Abdullah F, Abdullah MA, Othman F. Exogenous L-Glutathione Improves Vitrification Outcomes in Murine Preimplantation Embryos. Antioxidants (Basel) 2022; 11:antiox11112100. [PMID: 36358471 PMCID: PMC9686984 DOI: 10.3390/antiox11112100] [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: 09/07/2022] [Revised: 10/04/2022] [Accepted: 10/19/2022] [Indexed: 11/16/2022] Open
Abstract
Vitrification is an important tool to store surplus embryos in assisted reproductive technology (ART). However, vitrification increases oxidative damage and results in decreased viability. Studies have reported that L-glutathione (GSH) supplementation improves the preimplantation development of murine embryos. Glutathione constitutes the major non-protein sulphydryl compound in mammalian cells, which confers protection against oxidative damage. However, the effect of GSH supplementation on embryonic vitrification outcomes has yet to be reported. This study aims to determine whether GSH supplementation in culture media improves in vitro culture and vitrification outcomes, as observed through embryo morphology and preimplantation development. Female BALB/c mice aged 6−8 weeks were superovulated through an intraperitoneal injection of 10 IU of pregnant mare serum gonadotrophin (PMSG), followed by 10 IU of human chorionic gonadotrophin (hCG) 48 h later. The mated mice were euthanized by cervical dislocation 48 h after hCG to harvest embryos. Two-cell embryos were randomly assigned to be cultured in either Group 1 (GSH-free medium), Group 2 (GSH-free medium with vitrification), Group 3 (0.01 mM GSH-supplemented medium), or Group 4 (0.01 mM GSH-supplemented medium with vitrification). Non-vitrified (Groups 1 and 3) and vitrified (Groups 2 and 4) embryos were observed for morphological quality and preimplantation development at 24, 48, 72, and 96 h. In the non-vitrified groups, there were significant increases in the number of Grade-1 blastocysts in GSH cultures (p < 0.05). Similarly, in the vitrified groups, GSH supplementation was also seen to significantly increase blastocyst formation. Exogenous GSH supplementation resulted in a significant increase in intracellular GSH, a release of cytochrome c from mitochondria, and a parallel decrease in intracellular reactive oxygen species (ROS) levels in vitrified eight-cell embryos (p < 0.05). GSH supplementation was shown to upregulate Bcl2 expression and downregulate Bax expression in the vitrified preimplantation embryo group. The action of exogenous GSH was concomitant with an increase in the relative abundance of Gpx1 and Sod1. In conclusion, our study demonstrated the novel use and practical applicability of GSH supplementation for improving embryonic cryotolerance via a decrease in ROS levels and the inhibition of apoptotic events by improvement in oxidative status.
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Affiliation(s)
- Nor-Shahida Abdul Rahman
- Maternofetal and Embryo Research Group (MatE), Faculty of Medicine, Universiti Teknologi MARA, Selangor Branch, Sungai Buloh Campus, Sungai Buloh 47000, Selangor, Malaysia
- Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia
| | - Nor-Ashikin Mohamed Noor Khan
- Maternofetal and Embryo Research Group (MatE), Faculty of Medicine, Universiti Teknologi MARA, Selangor Branch, Sungai Buloh Campus, Sungai Buloh 47000, Selangor, Malaysia
- Correspondence:
| | - Zolkapli Eshak
- Faculty of Pharmacy, Universiti Teknologi MARA, Selangor Branch, Puncak Alam Campus, Bandar Puncak Alam 42300, Selangor, Malaysia
| | - Mimi-Sophia Sarbandi
- Maternofetal and Embryo Research Group (MatE), Faculty of Medicine, Universiti Teknologi MARA, Selangor Branch, Sungai Buloh Campus, Sungai Buloh 47000, Selangor, Malaysia
- Faculty of Applied Sciences, Universiti Teknologi MARA, Perak Branch, Tapah Campus, Tapah Road 35400, Perak, Malaysia
| | - Aqila-Akmal Mohammad Kamal
- Maternofetal and Embryo Research Group (MatE), Faculty of Medicine, Universiti Teknologi MARA, Selangor Branch, Sungai Buloh Campus, Sungai Buloh 47000, Selangor, Malaysia
| | - Mastura Abd Malek
- Maternofetal and Embryo Research Group (MatE), Faculty of Medicine, Universiti Teknologi MARA, Selangor Branch, Sungai Buloh Campus, Sungai Buloh 47000, Selangor, Malaysia
| | - Fathiah Abdullah
- Maternofetal and Embryo Research Group (MatE), Faculty of Medicine, Universiti Teknologi MARA, Selangor Branch, Sungai Buloh Campus, Sungai Buloh 47000, Selangor, Malaysia
- Faculty of Applied Sciences, Universiti Teknologi MARA, Perak Branch, Tapah Campus, Tapah Road 35400, Perak, Malaysia
| | | | - Fezah Othman
- Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia
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Cai MD, Xu ZQ, Liu YH, Liu JQ, Zhao SY, Wang XJ, Li YH, Yu XL, Li XX. LncRNA-mediated effects of vitrification temperatures and cryoprotectant concentrations on bovine oocyte development following vitrification at the GV stage. Theriogenology 2022; 186:135-145. [DOI: 10.1016/j.theriogenology.2022.03.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 03/21/2022] [Accepted: 03/28/2022] [Indexed: 11/05/2022]
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Dou M, Lu C, Liu J, Rao W. Liquid Helium Enhanced Vitrification Efficiency of Human Bone-Derived Mesenchymal Stem Cells and Human Embryonic Stem Cells. Bioengineering (Basel) 2021; 8:162. [PMID: 34821728 PMCID: PMC8615062 DOI: 10.3390/bioengineering8110162] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 10/19/2021] [Accepted: 10/21/2021] [Indexed: 12/02/2022] Open
Abstract
Stem cells have the capacity to self-renew and differentiate to specialized cells, which are usually sensitive to cryopreservation. Therefore, the cell survival rate of stem cells using common cryopreservation protocol is generally not ideal. High cooling rates are crucial for decreasing the usage of cryoprotectants (CPAs) and promoting the successful vitrification of stem cells. In this study, we adopted liquid helium (LHe) instead of liquid nitrogen (LN2) as the cryogen to achieve high cooling rates for vitrifying stem cells with high viability and complete functions. A numerical model was established to simulate the cooling processes of vitrifying specimens by immersing them in LHe and LN2. The calculated results revealed higher cooling rates when plunging specimens into LHe than into LN2. The high viability of human bone-derived mesenchymal stem cells (hBMSCs) and human embryonic stem cells (hESCs) after vitrifying into LHe also shows the superiority of LHe as the cryogen. Furthermore, considerable cell viability was achieved by vitrification in LHe, even when decreasing the concentrations of CPAs. Additionally, post-vitrification, the cells still maintained high attachment and proliferation efficiency, normal stemness, and multipotential differentiation both for hBMSCs and hESCs. LHe is prospective to be employed as a universal cryogen for vitrification which has a great potential for widespread applications, including bioengineering and clinical medicine.
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Affiliation(s)
- Mengjia Dou
- CAS Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China; (M.D.); (C.L.); (J.L.)
- School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, China
- Beijing Key Laboratory of Cryo-Biomedical Engineering, Beijing 100190, China
| | - Chennan Lu
- CAS Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China; (M.D.); (C.L.); (J.L.)
- Beijing Key Laboratory of Cryo-Biomedical Engineering, Beijing 100190, China
- School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jing Liu
- CAS Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China; (M.D.); (C.L.); (J.L.)
- Beijing Key Laboratory of Cryo-Biomedical Engineering, Beijing 100190, China
- School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wei Rao
- CAS Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China; (M.D.); (C.L.); (J.L.)
- Beijing Key Laboratory of Cryo-Biomedical Engineering, Beijing 100190, China
- School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, China
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5
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Castro PL, Ferraz ALJ, Patil JG, Ribeiro RP. Use of melatonin as an inhibitor of apoptotic process for cryopreservation of zebrafish (Danio rerio) embryos. BRAZ J BIOL 2021; 82:e241081. [PMID: 34105654 DOI: 10.1590/1519-6984.241081] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 11/18/2020] [Indexed: 01/31/2023] Open
Abstract
This study investigated the use of melatonin to arrest the effects of apoptosis in vitrified zebrafish (D. rerio) embryos. Dechorionated embryos at 22-24 somite-stage were divided (n = 60/treatment) into a non-vitrified (Control Group, 0 M melatonin) and vitrified treatments with 0 M (T1), 1 µM (T2) and 1 mM of melatonin (T3). For vitrified treatments, a solution methanol/propylene glycol based was used and the embryos stored in -196 °C for a week. After thaw, survival rate, scanning electron microscopy, expression of anti (bcl-2) and pro-apoptotic (bax/caspase-3) genes, reactive oxygen species (ROS) formation and DNA fragmentation analyses were performed. No live embryos were obtained from vitrified treatments, observing a rapid degeneration immediately after thawing, with the vitelline layer rupture and leakage of its content, followed by breakdown of epithelial cells and melanisation of the tissue. Regarding the apoptotic process, T3 had the highest relative gene expression, for the three genes (P < 0.05) furthermore, T2 had similar expression of pro-apoptotic genes to CG (P < 0.05). ROS formation revealed that CG presented lower percentage of embryo surface area affected (3.80 ± 0.40%) (P < 0.05), in contrast, no differences were found among the other groups. T1 was most significantly (P < 0.05) damaged by DNA fragmentation. The vitrified groups with melatonin had similar damage levels of CG (P > 0.05). The inclusion of 1 µM of melatonin in the vitrifying solution, countered the effects of apoptotic process in post-thaw embryos, suggesting its utility in cryopreserving fish embryos.
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Affiliation(s)
- P L Castro
- Universidade Estadual de Maringá - UEM, Departamento de Zootecnia, Maringá, PR, Brasil
| | - A L J Ferraz
- Universidade Estadual de Mato Grosso do Sul - UEMS, Aquidauana, MS, Brasil
| | - J G Patil
- Fisheries and Aquaculture Center, Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, Australia
| | - R P Ribeiro
- Universidade Estadual de Maringá - UEM, Departamento de Zootecnia, Maringá, PR, Brasil
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Vitrification of immature bovine oocytes in protein-free media: The impact of the cryoprotectant treatment protocol, base medium, and ovary storage. Theriogenology 2021; 172:47-54. [PMID: 34098168 DOI: 10.1016/j.theriogenology.2021.05.029] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 05/25/2021] [Accepted: 05/25/2021] [Indexed: 11/23/2022]
Abstract
Protein-free media are essential for the sanitary cryopreservation of bovine genetic resources. Our aim was to set up an optimized protocol for the vitrification of immature bovine oocytes using protein free media which can provide the highest embryo development rates and embryo quality after subsequent in vitro maturation and fertilization. First, using a protein free NCSU-37 as base medium we compared the efficacy of vitrification on Cryotop device with two different CPA protocols. "Protocol A″ employed a combination of ethylene glycol and propylene glycol as permeating cryoprotectants (pCPA) and equilibration in 4% total pCPA (2% ethylene glycol + 2% propylene glycol). "Protocol B″ employed a combination of ethylene glycol and DMSO and equilibration in 15% total pCPA (7.5% ethylene glycol + 7.5% DMSO). The 2 protocols were equally effective in terms of oocyte survival and subsequent development to the blastocyst stage. However, blastocyst cell numbers were significantly higher with "Protocol A". TCM-199 and NCSU-37 were equally effective as base media for vitrification. Vitrification with "Protocol A″ reduced the percentage of live oocytes and subsequent development to blastocyst stage but did not affect the hatching and cell numbers of blastocysts when compared to the non-treated group. CPA treatment of "Protocol A″ without cooling did not affect embryo development. Storage of ovaries in PBS at 15 °C for overnight reduced the percentage of surviving oocytes after vitrification but not their subsequent development to the blastocyst stage. In conclusion we established a vitrification protocol for the cryopreservation of immature bovine oocytes employing protein-free media which provided high blastocyst quality without noticeable toxic effects.
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7
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Zhang ZY, Yu XL, Cai MD, Liu YH, Liu JQ, Zhao SY, Li XX, Li YH. Relationship between bovine oocytes developmental competence and mRNA expression of apoptotic and mitochondrial genes following the change of vitrification temperatures and cryoprotectant concentrations. Cryobiology 2020; 97:110-122. [PMID: 33011172 DOI: 10.1016/j.cryobiol.2020.09.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 09/28/2020] [Accepted: 09/29/2020] [Indexed: 02/09/2023]
Abstract
The present study analyzed the relationship between bovine oocytes developmental competence and mRNA expression of apoptotic and mitochondrial genes following the change of vitrification temperatures (VTs) and cryoprotectant agent concentrations (CPAs). Cumulus oocyte complexes were randomly divided into five groups: control, vitrified in liquid nitrogen (LN; -196 °C) with 5.6 M CPAs (LN 5.6 M), LN with 6.6 M CPAs (LN 6.6 M), liquid helium (LHe; -269 °C) with 5.6 M CPAs (LHe 5.6 M), and LHe with 6.6 M CPAs (LHe 6.6 M). After vitrification and warming, oocytes of vitrified and control groups were subjected to in vitro maturation (IVM), in vitro fertilization and in vitro culture. The blastocyst rate in LHe 5.6 M group was the highest among the four vitrified groups (13.7% vs. 9.4%, 1.3%, and 8.4%; P < 0.05). The mRNA expression level of 8 apoptotic- and 12 mitochondria-related genes were detected through qRT-PCR after IVM. Lower VT (LHe, -269 °C) positively affected the mRNA expression levels of apoptotic genes (BAD, BID, BTK, TP53, and TP53I3) and mitochondrial genes (COX6B1, DERA, FIS1, NDUFA1, NDUFA4, PRDX2, SLC25A5, TFB1M, and UQCRB), and reduced oxidative stress from freezing. Decreased CPAs (5.6 M) positively affected mRNA expression levels of apoptotic genes (BAD, BCL2A1, BID, and CASP3) in LHe vitrification but negatively affected apoptotic genes (BAD, BAX, BID, BTK, and BCL2A1) in LN vitrification. In conclusion, decreased VTs and CPAs in LHe vitrification may increase the blastocyst rate by changing the mRNA expression levels of these apoptotic and mitochondrial genes for the vitrified oocytes.
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Affiliation(s)
- Zhi Yang Zhang
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, 471023, China; Henan Provincial Key Laboratory for Grass-Feeding Animal, Henan University of Science and Technology, Luoyang, 471023, China
| | - Xue Li Yu
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, 471023, China; Henan Provincial Key Laboratory for Grass-Feeding Animal, Henan University of Science and Technology, Luoyang, 471023, China.
| | - Meng Dan Cai
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, 471023, China; Henan Provincial Key Laboratory for Grass-Feeding Animal, Henan University of Science and Technology, Luoyang, 471023, China
| | - Yi Heng Liu
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, 471023, China; Henan Provincial Key Laboratory for Grass-Feeding Animal, Henan University of Science and Technology, Luoyang, 471023, China
| | - Jia Qi Liu
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, 471023, China; Henan Provincial Key Laboratory for Grass-Feeding Animal, Henan University of Science and Technology, Luoyang, 471023, China
| | - Shi Yu Zhao
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, 471023, China; Henan Provincial Key Laboratory for Grass-Feeding Animal, Henan University of Science and Technology, Luoyang, 471023, China
| | - Xiao Xia Li
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, 471023, China; Henan Provincial Key Laboratory for Grass-Feeding Animal, Henan University of Science and Technology, Luoyang, 471023, China
| | - Ying Hua Li
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, 471023, China; Henan Provincial Key Laboratory for Grass-Feeding Animal, Henan University of Science and Technology, Luoyang, 471023, China
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Vendrell-Flotats M, García-Martínez T, Martínez-Rodero I, Lopez-Bejar M, LaMarre J, Yeste M, Mogas T. In Vitro Maturation with Leukemia Inhibitory Factor Prior to the Vitrification of Bovine Oocytes Improves Their Embryo Developmental Potential and Gene Expression in Oocytes and Embryos. Int J Mol Sci 2020; 21:ijms21197067. [PMID: 32992968 PMCID: PMC7582665 DOI: 10.3390/ijms21197067] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Revised: 09/16/2020] [Accepted: 09/22/2020] [Indexed: 12/17/2022] Open
Abstract
Oocyte cryopreservation has a significant impact on subsequent embryonic development. Herein, we investigated whether supplementing in vitro maturation medium with Leukemia Inhibitory Factor (LIF) prior to vitrification affects embryo development and gene expression at different embryo developmental stages. A panel of genes including maternal effect, epigenetics, apoptosis and heat stress was relatively quantified. The results show reduced cleavage rates after vitrification, regardless of the LIF treatment. Although not statistically different from control-vitrified oocytes, oocyte apoptosis and the blastocyst yield of LIF-vitrified oocytes were similar to their non-vitrified counterparts. Vitrification increased oocyte ZAR1, NPM2 and DPPA3 gene expression while its expression decreased in LIF-vitrified oocytes to similar or close levels to those of non-vitrified oocytes. With a few gene-specific exceptions, vitrification significantly increased the expression of DNMT3A, HDAC1, KAT2A, BAX and BCL2L1 in oocytes and most stages of embryo development, while comparable expression patterns for these genes were observed between LIF-vitrified and non-vitrified groups. Vitrification increased HSPA1A expression in oocytes and HSP90AA1 in 2-cell embryos. Our data suggest that vitrification triggers stage-specific changes in gene expression throughout embryonic development. However, the inclusion of LIF in the IVM medium prior to vitrification stimulates blastocyst development and several other developmental parameters and induces oocytes and embryos to demonstrate gene expression patterns similar to those derived from non-vitrified oocytes.
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Affiliation(s)
- Meritxell Vendrell-Flotats
- Department of Animal Medicine and Surgery, Autonomous University of Barcelona, ES-08193 Cerdanyola del Vallès, Spain; (M.V.-F.); (T.G.-M.); (I.M.-R.)
- Department of Animal Health and Anatomy, Autonomous University of Barcelona, ES-08193 Cerdanyola del Vallès, Spain;
| | - Tania García-Martínez
- Department of Animal Medicine and Surgery, Autonomous University of Barcelona, ES-08193 Cerdanyola del Vallès, Spain; (M.V.-F.); (T.G.-M.); (I.M.-R.)
| | - Iris Martínez-Rodero
- Department of Animal Medicine and Surgery, Autonomous University of Barcelona, ES-08193 Cerdanyola del Vallès, Spain; (M.V.-F.); (T.G.-M.); (I.M.-R.)
| | - Manel Lopez-Bejar
- Department of Animal Health and Anatomy, Autonomous University of Barcelona, ES-08193 Cerdanyola del Vallès, Spain;
- College of Veterinary Medicine, Western University of Health Sciences, Pomona, CA 91766, USA
| | - Jonathan LaMarre
- Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada;
| | - Marc Yeste
- Department of Biology, Institute of Food and Agricultural Technology, University of Girona, ES-17004 Girona, Spain;
| | - Teresa Mogas
- Department of Animal Medicine and Surgery, Autonomous University of Barcelona, ES-08193 Cerdanyola del Vallès, Spain; (M.V.-F.); (T.G.-M.); (I.M.-R.)
- Correspondence: ; Tel.: +34-93-581-10-44
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Deutschmeyer VE, Richter AM. The ZAR1 protein in cancer; from epigenetic silencing to functional characterisation and epigenetic therapy of tumour suppressors. Biochim Biophys Acta Rev Cancer 2020; 1874:188417. [PMID: 32828887 DOI: 10.1016/j.bbcan.2020.188417] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Revised: 08/06/2020] [Accepted: 08/07/2020] [Indexed: 12/14/2022]
Abstract
ZAR1, zygote arrest 1, is a zinc finger protein (C-terminus), which was initially identified in mouse oocytes. Later it was found that its expression is present in various human tissues e.g. lung and kidney. Interestingly, it was observed that in various tumour types the ZAR1 transcript is missing due to hypermethylation of its CpG island promoter, but not ZAR2. Since methylation of the ZAR1 promoter is described as a frequent event in tumourigenesis, ZAR1 could serve as a useful diagnostic marker in cancer screens. ZAR1 was described as a useful prognostic/diagnostic cancer marker for lung cancer, kidney cancer, melanoma and possibly liver carcinoma. Furthermore, ZAR1 was reactivated as a tumour suppressor by epigenetic therapy using CRISPR-dCas9 method. This method holds the potential to precisely target not only ZAR1 and reactivate tumour suppressors in a tailored cancer therapy. ZAR1 is highly conserved amongst vertebrates, especially its zinc finger, which is the relevant domain for its protein and RNA binding ability. ZAR1 is implicated in various cellular mechanisms including regulation of oocyte/embryo development, cell cycle control and mRNA binding, though little was known about the underlying mechanisms. ZAR1 was reported to regulate and activate translation through the binding to TCS translation control sequences in the 3'UTRs of its target mRNA the kinase WEE1. ZAR1 has a tumour suppressing function by inhibiting cell cycle progression. Here we review the current literature on ZAR1 focusing on structural, functional and epigenetic aspects. Characterising the cellular mechanisms that regulate the signalling pathways ZAR1 is involved in, could lead to a deeper understanding of tumour development and, furthermore, to new strategies in cancer treatment.
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Affiliation(s)
| | - Antje M Richter
- Institute for Genetics, University of Giessen, 35392 Giessen, Germany; Max-Planck Institute for Heart and Lung Research, 61231, Bad Nauheim, Germany.
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Khodavandpour Z, Zavareh S, Farrokh P, Nasiri M. Assessment of DNA Repair Gene Expressions in Vitrified Mouse Preantral Follicles. CELL JOURNAL 2020; 22:81-88. [PMID: 32779437 PMCID: PMC7481908 DOI: 10.22074/cellj.2020.6865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Accepted: 08/19/2019] [Indexed: 12/03/2022]
Abstract
Objective Vitrification of the ovarian tissue is one of the techniques recommended for preserving the fertility of women
who are dealing with infertility. Despite its benefits, our information about the molecular aspects of ovarian follicles
vitrification is somehow ambiguous. Therefore, the aim of this study was to evaluate the expression pattern of DNA
repair genes in vitrified preantral follicles.
Materials and Methods In this experimental study, the isolated preantral follicles (n=906) from 14-16 days old mice
(n=12) were divided into three groups: fresh, toxic and vitrified which were cultured in vitro for 12 days. Preantral
follicles were vitrified using cryotop followed by exposure to equilibration solution for five minutes and vitrification
solution (VS) for 30 seconds. In the toxic group, preantral follicles were only placed in equilibration and vitrification
media and they were then placed in the warming solutions without exposure to liquid nitrogen. On the second and
sixth days of the culture period, real-time quantitative reverse transcription-polymerase chain reaction (qRT-PCR) was
carried out to evaluate expression of the selected genes involved in DNA repair, including Msh6 (MutS homolog 6),
Mre11 (Meiotic recombination 11), Brca1 (Breast cancer type 1), Rad51 (RAD51 recombinase), Pcna (Proliferating
cell nuclear antigen) and Atm (ATM serine/threonine kinase). In addition, developmental parameters including growth,
survival rate, antrum cavity formation and ovulation were analyzed.
Results The relative mRNA expression of Msh6, Mre11, Brca1, Rad51, Pcna and Atm on the second and sixth days
of the culture period in vitrified group was significantly higher than those of the control and toxic groups, but there was
no significant difference between the toxic and control groups. In addition, developmental parameters of follicles were
similar in both toxic and control groups, while both were significantly higher than that of vitrified group.
Conclusion Vitrification changes the expression pattern of DNA repair genes of the mouse preantral follicles.
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Affiliation(s)
- Zahra Khodavandpour
- Department of Biology, Damghan Branch, Islamic Azad University, Damghan, Iran
| | - Saeed Zavareh
- School of Biology, Damghan University, Damghan, Iran. Electronic Address: .,Institute of Biological Sciences, Damghan University, Damghan, Iran
| | - Parisa Farrokh
- School of Biology, Damghan University, Damghan, Iran.,Institute of Biological Sciences, Damghan University, Damghan, Iran
| | - Meysam Nasiri
- School of Biology, Damghan University, Damghan, Iran.,Institute of Biological Sciences, Damghan University, Damghan, Iran
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11
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Huang J, Ma Y, Wei S, Pan B, Qi Y, Hou Y, Meng Q, Zhou G, Han H. Dynamic changes in the global transcriptome of bovine germinal vesicle oocytes after vitrification followed by in vitro maturation. Reprod Fertil Dev 2019; 30:1298-1313. [PMID: 29661269 DOI: 10.1071/rd17535] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Accepted: 03/13/2018] [Indexed: 12/11/2022] Open
Abstract
This study was conducted to investigate the effect of vitrification on the dynamics of the global transcriptome in bovine germinal vesicle (GV) oocytes and their in vitro-derived metaphase II (MII) oocytes. The GV oocytes were vitrified using the open-pulled straw method. After warming, GV oocytes and the resulting MII-stage oocytes were cultured in vitro for 2h and 24h respectively and were then collected. The fresh GV oocytes and their in vitro-derived MII oocytes were used as controls. Then, each pool (fresh GV, n=3; vitrified GV, n=4; fresh MII, n=1 and MII derived from vitrified GV, n=2) from the different stages was used for mRNA transcriptome sequencing. The results showed that the in vitro maturation rates of GV oocytes were significantly decreased (32.36% vs 53.14%) after vitrification. Bovine GV oocyte vitrification leads to 12 significantly upregulated and 19 downregulated genes. After culturing in vitro, the vitrification-derived MII oocytes showed 47 significantly upregulated and six downregulated genes when compared with those from fresh GV oocytes. Based on molecular function-gene ontology terms analysis and the Kyoto encyclopaedia of genes (KEGG) pathway database, the differentially expressed genes were associated with the pathways of cell differentiation and mitosis, transcription regulation, regulation of actin cytoskeleton, apoptosis and so on, which potentially result in the lower in vitro development of GV bovine oocytes.
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Affiliation(s)
- Jianwei Huang
- Beijing Key Laboratory for Animal Genetic Improvement, China Agricultural University, Beijing 100193, PR China
| | - YongShun Ma
- Beijing Key Laboratory for Animal Genetic Improvement, China Agricultural University, Beijing 100193, PR China
| | - Shao Wei
- Beijing Key Laboratory for Animal Genetic Improvement, China Agricultural University, Beijing 100193, PR China
| | - Bo Pan
- Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, PR China
| | - Yu Qi
- Beijing Key Laboratory for Animal Genetic Improvement, China Agricultural University, Beijing 100193, PR China
| | - YunPeng Hou
- State Key Laboratory of AgroBiotechnology, China Agricultural University, Beijing 100193, PR China
| | - QingYong Meng
- State Key Laboratory of AgroBiotechnology, China Agricultural University, Beijing 100193, PR China
| | - GuangBin Zhou
- Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, PR China
| | - HongBing Han
- Beijing Key Laboratory for Animal Genetic Improvement, China Agricultural University, Beijing 100193, PR China
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12
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Pitchayapipatkul J, Somfai T, Matoba S, Parnpai R, Nagai T, Geshi M, Vongpralub T. Microtubule stabilisers docetaxel and paclitaxel reduce spindle damage and maintain the developmental competence of in vitro-mature bovine oocytes during vitrification. Reprod Fertil Dev 2018; 29:2028-2039. [PMID: 28147214 DOI: 10.1071/rd16193] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2016] [Accepted: 12/10/2016] [Indexed: 11/23/2022] Open
Abstract
This study compared the efficacy of docetaxel (DT) and paclitaxel (PT) in reducing spindle damage during vitrification and maintaining the developmental competence of in vitro-matured (IVM) bovine oocytes after vitrification and warming. Pretreatment of IVM oocytes with 0.05µM DT for 30min before vitrification resulted in significantly higher (P<0.05) rates of oocyte survival and cleavage after IVF, as well as subsequent blastocyst rates on Days 7-9 and hatching on Days 8-9, compared with oocytes pretreated with 1.0µM PT before vitrification or those vitrified without pretreatment. When nuclear status and spindle morphology of vitrified oocytes were assess after warming by immunostaining, DT pretreatment before vitrification resulted in a significantly higher (P<0.05) percentage of oocytes at the MII stage with a normal, intact spindle compared with PT pretreatment or no pretreatment, but the percentage of MII oocytes was still significantly lower (P<0.05) than in the control group. Pretreatment of IVM bovine oocytes with 0.05µM DT or 1.0µM PT for 30min before vitrification reduces spindle damage to the same extent, without side effects on fertilisation and development. Pretreatment with 0.05µM DT improved the developmental competence of vitrified-warmed oocytes to a greater degree than 1.0µM PT pretreatment.
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Affiliation(s)
| | - Tamás Somfai
- Animal Breeding and Reproduction Research Division, National Agriculture and Food Research Organisation (NARO) Institute of Livestock and Grassland Science, 2 Ikenodai, Tsukuba, Ibaraki 305-0901, Japan
| | - Satoko Matoba
- Animal Breeding and Reproduction Research Division, National Agriculture and Food Research Organisation (NARO) Institute of Livestock and Grassland Science, 2 Ikenodai, Tsukuba, Ibaraki 305-0901, Japan
| | - Rangsan Parnpai
- Embryo Technology and Stem Cell Research Center, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
| | - Takashi Nagai
- Food and Fertilizer Technology Center, Taipei 10648, Taiwan
| | - Masaya Geshi
- Animal Breeding and Reproduction Research Division, National Agriculture and Food Research Organisation (NARO) Institute of Livestock and Grassland Science, 2 Ikenodai, Tsukuba, Ibaraki 305-0901, Japan
| | - Thevin Vongpralub
- Department of Animal Science, Faculty of Agriculture, Khon Kaen University, Khon Kaen 40002, Thailand
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13
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Quan G, Wu G, Hong Q. Oocyte Cryopreservation Based in Sheep: The Current Status and Future Perspective. Biopreserv Biobank 2017; 15:535-547. [DOI: 10.1089/bio.2017.0074] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Affiliation(s)
- Guobo Quan
- Department of Herbivore Science, Yunnan Animal Science and Veterinary Institute, Kunming, Yunnan Province, China
- Department of Animal Biosciences, University of Guelph, Guelph, Ontario, Canada
| | - Guoquan Wu
- Department of Herbivore Science, Yunnan Animal Science and Veterinary Institute, Kunming, Yunnan Province, China
| | - Qionghua Hong
- Department of Herbivore Science, Yunnan Animal Science and Veterinary Institute, Kunming, Yunnan Province, China
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14
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Effect of liquid helium vitrification on cytoskeleton of immature cattle oocytes. Anim Reprod Sci 2017; 187:91-99. [DOI: 10.1016/j.anireprosci.2017.10.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Revised: 09/28/2017] [Accepted: 10/13/2017] [Indexed: 11/19/2022]
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15
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Amoushahi M, Salehnia M, Mowla SJ, Ghorbanmehr N. Morphological and Molecular Aspects of In Vitro Culture of Preantral Follicles Derived from Vitrified Ovarian. CELL JOURNAL 2017; 19:332-342. [PMID: 28836396 PMCID: PMC5570399 DOI: 10.22074/cellj.2017.4264] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/15/2016] [Accepted: 08/13/2016] [Indexed: 11/04/2022]
Abstract
Objective This study aimed to evaluate the expression of the genes related to folliculo-genesis after vitrification of mouse ovarian tissues using a two-step in vitro culture.
Materials and Methods In this experimental study, vitrified and non-vitrified ovaries from
7- day old (neonate) female mice were cultured using alpha-Minimum Essential Medium
(α-MEM) supplemented with 5% fetal bovine serum (FBS) for 7 days. Morphology, surface
area of ovaries and percentage of normal follicles were evaluated and compared in both
groups. After one-week culture, in non-vitrified group, preantral follicles of cultured ovaries
were isolated and cultured in a three-dimensional alginate culture system for 12 days.
Then, the collected metaphase (M) II oocytes were inseminated with capacitated spermatozoa derived from 7-8-week old (adult) male NMRI mice. Follicular diameter, oocyte maturation, fertilization, embryo development and the expression of genes related to follicular
development (Pcna, Fshr and Cyp17a1,) using real time reverse transcription-polymerase
chain reaction (RT-PCR) were assessed at the end of last culture period in both groups.
Results The ovarian area in vitrified group (162468.20 703.78) was less than non-vitrified
group (297211.40 6671.71), while the percentage of preantral follicles in vitrified group
(18.40%) was significantly lower than those of non-vitrified group (24.50%) on day 7 of
culture (P<0.05). There were no significant differences between the two groups in terms of
follicular diameter, expression of genes related to development of follicles, oocyte maturation, fertilization, as well as embryo development (P>0.05).
Conclusion The results of this study showed that vitrification of ovarian tissue following
in vitro culture had negative impact on the survival and development of follicles within the
tissue. However, no significant alterations were observed in development, gene expression and hormonal production of in vitro culture of isolated follicles derived from vitrified
ovarian tissues as compared to the non-vitrified samples.
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Affiliation(s)
| | - Mojdeh Salehnia
- Department of Anatomy, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran.
| | - Seyed Javad Mowla
- Department of Biotechnology, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
| | - Nassim Ghorbanmehr
- Department of Biotechnology, Faculty of Biological Sciences, Alzahra University, Tehran, Iran
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16
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Wu H, Yu XL, Guo XF, Zhang F, Pei XZ, Li XX, Han WX, Li YH. Effect of liquid helium vitrification on the ultrastructure and related gene expression of mature bovine oocytes after vitrifying at immature stage. Theriogenology 2017; 87:91-99. [DOI: 10.1016/j.theriogenology.2016.08.010] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Revised: 07/31/2016] [Accepted: 08/05/2016] [Indexed: 12/15/2022]
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17
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Oocyte maturation, embryo development and gene expression following two different methods of bovine cumulus-oocyte complexes vitrification. Vet Res Commun 2016; 41:49-56. [DOI: 10.1007/s11259-016-9671-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Accepted: 12/05/2016] [Indexed: 10/20/2022]
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18
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Yu XL, Xu YK, Wu H, Guo XF, Li XX, Han WX, Li YH. Successful vitrification of bovine immature oocyte using liquid helium instead of liquid nitrogen as cryogenic liquid. Theriogenology 2016; 85:1090-6. [DOI: 10.1016/j.theriogenology.2015.11.020] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Revised: 11/16/2015] [Accepted: 11/24/2015] [Indexed: 11/26/2022]
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19
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Zhao XM, Hao HS, Du WH, Zhao SJ, Wang HY, Wang N, Wang D, Liu Y, Qin T, Zhu HB. Melatonin inhibits apoptosis and improves the developmental potential of vitrified bovine oocytes. J Pineal Res 2016; 60:132-41. [PMID: 26485053 DOI: 10.1111/jpi.12290] [Citation(s) in RCA: 107] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2015] [Accepted: 10/16/2015] [Indexed: 12/18/2022]
Abstract
Vitrification of oocytes has been shown to be closely associated with increased levels of reactive oxygen species (ROS) and apoptotic events. However, little information is available the effect of melatonin on the ROS levels and apoptotic events in vitrified oocytes. Therefore, we studied the effect of melatonin on ROS and apoptotic events in vitrified bovine oocytes by supplementing vitrification solution or in vitro maturation (IVM) and vitrification solution with 10(-9) m melatonin. We analyzed the ROS, mitochondrial Ca(2+) (mCa(2+) ) and membrane potential (ΔΨm), externalization of phosphatidylserine (PS), caspase-3 activation, DNA fragmentation, mRNA expression levels of Bax and Bcl2 l1, and developmental potential of vitrified bovine oocytes. Vitrified bovine oocytes exhibited increased levels of ROS, mCa(2+) , Bax mRNA, and caspase-3 protein and higher rates of PS externalization and DNA fragmentation, and decreased ΔΨm and Bcl2 l1 mRNA expression level. However, melatonin supplementation in vitrification solution or IVM and vitrification solution significantly decreased the levels of ROS, mCa(2+) , Bax mRNA expression, and caspase-3 protein, and PS externalization and DNA fragmentation rates, and increased the ΔΨm and Bcl2 l1 mRNA expression level in vitrified oocytes, resulting in an increased developmental ability of vitrified bovine oocytes after parthenogenetic activation. The developmental ability of vitrified oocytes with melatonin supplementation in IVM and vitrification solution was similar to that of fresh ones. This study showed that supplementing the IVM and vitrification medium or vitrification medium with 10(-9) m melatonin significantly decreased the ROS level and inhibited apoptotic events of vitrified bovine oocytes, consequently increasing their developmental potential.
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Affiliation(s)
- Xue-Ming Zhao
- Embryo Biotechnology and Reproduction Laboratory, Institute of Animal Sciences (IAS), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| | - Hai-Sheng Hao
- Embryo Biotechnology and Reproduction Laboratory, Institute of Animal Sciences (IAS), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| | - Wei-Hua Du
- Embryo Biotechnology and Reproduction Laboratory, Institute of Animal Sciences (IAS), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| | - Shan-Jiang Zhao
- Embryo Biotechnology and Reproduction Laboratory, Institute of Animal Sciences (IAS), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| | - Hao-Yu Wang
- Embryo Biotechnology and Reproduction Laboratory, Institute of Animal Sciences (IAS), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| | - Na Wang
- Embryo Biotechnology and Reproduction Laboratory, Institute of Animal Sciences (IAS), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| | - Dong Wang
- Embryo Biotechnology and Reproduction Laboratory, Institute of Animal Sciences (IAS), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| | - Yan Liu
- Embryo Biotechnology and Reproduction Laboratory, Institute of Animal Sciences (IAS), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| | - Tong Qin
- Embryo Biotechnology and Reproduction Laboratory, Institute of Animal Sciences (IAS), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| | - Hua-Bin Zhu
- Embryo Biotechnology and Reproduction Laboratory, Institute of Animal Sciences (IAS), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
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20
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Pan Y, Cui Y, Baloch AR, Fan J, He J, Zhang Y, Zheng H, Li G, Yu S. Association of heat shock protein 90 with the developmental competence of immature oocytes following Cryotop and solid surface vitrification in yaks (Bos grunniens). Cryobiology 2015; 71:33-9. [PMID: 26049112 DOI: 10.1016/j.cryobiol.2015.06.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2015] [Revised: 05/27/2015] [Accepted: 06/02/2015] [Indexed: 11/29/2022]
Abstract
The correlation between the 90 kDa heat-shock protein (HSP90) and the developmental competence of yak (Bos grunniens) oocytes following the process of vitrification has not been studied clearly. In the present study, we compare the efficacies of Cryotop (CT) and solid surface vitrification (SSV) methods for the cryopreservation of immature yak oocytes. Yak cumulus oocyte complexes were randomly allocated into three groups: (1) controls, (2) CT vitrification, and (3) SSV vitrification. Oocytes were vitrified and in vitro maturated and fertilized. The percentages of nuclear maturation and in vitro development were evaluated. The vitrified-warmed oocytes were evaluated for mRNA and protein expression levels of HSP90 using quantitative real-time PCR and western blotting at various stages: matured oocytes, 2-8 cells embryos and blastocysts. No difference was found in the percentages of nuclear maturation, cleavage or blastocyst in the two vitrified groups; however, the rates of maturation were significantly lower than those in the control group. Among the three groups, the maturation rates in CT: 51.14±0.86% and SSV: 50.82±1.34% were less than those of the controls: 69.65±1.13%; the cleavage rates in CT: 39.16±1.01% and SSV: 39.08±0.92%, were less than those of the controls: 58.14±0.76%; but the blastocysts rates and total cell number in the blastocysts were similar: CT: 32.20±0.73% and 104.6±3.72; SSV: 32.35±0.81% and 102.4±1.34; and controls: 34.38±1.32% and 103.8±4.13, respectively. The HSP90 expression level in the matured oocytes and 2-8 cell embryos of the control group was significantly higher than that in the two vitrified groups; there was not significant difference in the blastocysts in the three groups. We thus conclude that CT and SSV perform equally in the vitrification of immature yak oocytes during the process of cryopreservation, and their influence on oocytes mainly occured from the maturation to cleavage stages. The HSP90 levels in the blastocysts of the vitrified groups increased is associated with the developmental competence of the embryo.
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Affiliation(s)
- Yangyang Pan
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Yan Cui
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | | | - Jiangfeng Fan
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Junfeng He
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Yifu Zhang
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Hongfei Zheng
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Guyue Li
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Sijiu Yu
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China.
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