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Temerario L, Cicirelli V, Martino NA, Carbonari A, Burgio M, Frattina L, Lacalandra GM, Rizzo A, Dell'Aquila ME. Short- and Long-Term Storage of Non-Domesticated European Mouflon ( Ovis aries musimon) Cumulus-Oocyte Complexes Recovered in Field Conditions. Animals (Basel) 2024; 14:807. [PMID: 38473192 DOI: 10.3390/ani14050807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Revised: 02/26/2024] [Accepted: 03/04/2024] [Indexed: 03/14/2024] Open
Abstract
Reproductive biotechnologies can be used as a supporting tool, through gamete conservation and in vitro embryo production, in the preservation of invaluable and irreplaceable animal genetic resources. In the present study, immature mouflon cumulus-oocyte complexes (COCs) collected from ovariectomized female ovaries underwent short- or long-term conservation (24 h maintained in Earle's/Hank's (EH) medium or vitrification) under field conditions and afterwards transported to the laboratory where they were cultured for in vitro maturation (IVM) and assessed for oocyte meiotic competence and bioenergetic-oxidative status. Utilization of both storage techniques led to COC morphology preservation, as well as cumulus expansion and oocyte meiotic resumption after the IVM procedure. Quantitative bioenergetic-oxidative parameters were reduced in vitrified oocytes compared with EH ones. Immature COC storage needs to be optimized in both domesticated and non-domesticated sheep as a part of the strategy to avoid the loss of valuable genotypes of these animal species.
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Affiliation(s)
- Letizia Temerario
- Department of Biosciences, Biotechnologies & Environment, University of Bari Aldo Moro, Strada per Casamassima km 3, 70010 Valenzano, Italy
| | - Vincenzo Cicirelli
- Department of Veterinary Medicine, University of Bari Aldo Moro, km 3 Strada per Casamassima, 70010 Valenzano, Italy
| | - Nicola Antonio Martino
- Department of Biosciences, Biotechnologies & Environment, University of Bari Aldo Moro, Strada per Casamassima km 3, 70010 Valenzano, Italy
| | - Alice Carbonari
- Department of Veterinary Medicine, University of Bari Aldo Moro, km 3 Strada per Casamassima, 70010 Valenzano, Italy
| | - Matteo Burgio
- Department of Veterinary Medicine, University of Bari Aldo Moro, km 3 Strada per Casamassima, 70010 Valenzano, Italy
| | - Lorenza Frattina
- Department of Veterinary Medicine, University of Bari Aldo Moro, km 3 Strada per Casamassima, 70010 Valenzano, Italy
| | - Giovanni Michele Lacalandra
- Department of Veterinary Medicine, University of Bari Aldo Moro, km 3 Strada per Casamassima, 70010 Valenzano, Italy
| | - Annalisa Rizzo
- Department of Veterinary Medicine, University of Bari Aldo Moro, km 3 Strada per Casamassima, 70010 Valenzano, Italy
| | - Maria Elena Dell'Aquila
- Department of Biosciences, Biotechnologies & Environment, University of Bari Aldo Moro, Strada per Casamassima km 3, 70010 Valenzano, Italy
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Temerario L, Monaco D, Mastrorocco A, Martino NA, Cseh S, Lacalandra GM, Ciani E, Dell'Aquila ME. New Strategies for Conservation of Gentile di Puglia Sheep Breed, an Autochthonous Capital of Millennial Tradition in Southern Italy. Animals (Basel) 2023; 13:2371. [PMID: 37508148 PMCID: PMC10376504 DOI: 10.3390/ani13142371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 07/18/2023] [Accepted: 07/19/2023] [Indexed: 07/30/2023] Open
Abstract
Gentile di Puglia (GdP) is an autochthonous sheep breed of Southern Italy included among ovine breeds threatened by genetic erosion and extinction risk, which have been given attention by local and international institutions, thus emphasizing the need for germplasm conservation actions. In the present study, two assisted reproduction approaches, finalized for GdP conservation, were performed: (1) on-farm reproductive efficiency evaluation, expressed as pregnancy rate (PR), twin pregnancy rate (tPR), and body condition score (BCS), for three consecutive breeding cycles and (2) pre-pubertal lambs' immature cumulus-oocyte complex (COC) retrieval, vitrification, in vitro maturation (IVM), and assessment of meiotic stage and bioenergetic-oxidative status compared with those of other Italian and European commercial breeds. PR and tPR were progressively reduced over time. In all clinical examination times, BCS was significantly lower in nonpregnant ewes compared with pregnant ones. Fresh GdP pre-pubertal lamb COCs achieved meiotic maturation and showed healthy bioenergetic-oxidative status after IVM. Vitrification reduced the oocyte maturation rate in all groups. However, mature oocytes retained their cytoplasmic maturity, expressed as a mitochondria distribution pattern and activity, indicating promising developmental competence. In conclusion, clinical- and biotechnological-assisted reproduction approaches can support conservation strategies of GdP and other local sheep breeds in Southern Italy.
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Affiliation(s)
- Letizia Temerario
- Department of Biosciences, Biotechnologies & Environment, University of Bari Aldo Moro, Strada per Casamassima km 3, Valenzano, 70010 Bari, Italy
| | - Davide Monaco
- Department of Veterinary Medicine, University of Bari Aldo Moro, Strada per Casamassima km 3, Valenzano, 70010 Bari, Italy
| | - Antonella Mastrorocco
- Department of Biosciences, Biotechnologies & Environment, University of Bari Aldo Moro, Strada per Casamassima km 3, Valenzano, 70010 Bari, Italy
| | - Nicola Antonio Martino
- Department of Biosciences, Biotechnologies & Environment, University of Bari Aldo Moro, Strada per Casamassima km 3, Valenzano, 70010 Bari, Italy
| | - Sándor Cseh
- Department of Obstetrics and Food Animal Medicine Clinic, University of Veterinary Medicine, István St. 2, 1078 Budapest, Hungary
| | - Giovanni Michele Lacalandra
- Department of Veterinary Medicine, University of Bari Aldo Moro, Strada per Casamassima km 3, Valenzano, 70010 Bari, Italy
| | - Elena Ciani
- Department of Biosciences, Biotechnologies & Environment, University of Bari Aldo Moro, Strada per Casamassima km 3, Valenzano, 70010 Bari, Italy
| | - Maria Elena Dell'Aquila
- Department of Biosciences, Biotechnologies & Environment, University of Bari Aldo Moro, Strada per Casamassima km 3, Valenzano, 70010 Bari, Italy
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Zhang P, Yang S, Zhang H, Hao H, Du W, Wang J, Hao T, Zhu H, Umer S, Zhao X. Vitrification of bovine germinal vesicle oocytes significantly decreased the methylation level of their in vitro derived MII oocytes. Reprod Fertil Dev 2022; 34:889-903. [PMID: 35927063 DOI: 10.1071/rd22130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 07/19/2022] [Indexed: 11/23/2022] Open
Abstract
CONTEXT The vitrification of oocytes is important for the conservation of animals, and the effect of vitrification on methylation patterns of bovine oocytes remains unclear. AIMS This article aims to investigate the effect of vitrification on the DNA methylation patterns on vitrified GV oocytes and their in vitro derived MII oocytes. METHODS 5-MeC staining and single-cell whole genome bisulphite sequencing (SC-WGBS) were utilised to analyse fresh GV oocytes (F_GV group), MII oocytes (F_MII group), vitrified GV oocytes (V_GV group) and their in vitro derived MII oocytes (V_MII group). KEY RESULTS Results of both 5-MeC staining and SC-WGBS showed that no significant difference was found between the F_GV group and the V_GV group, while the methylation level of the V_MII group was significantly lower than that of the F_MII group. Moreover, supplementation of 2μM resveratrol (Res) in IVM medium significantly improved maturation and development ability of vitrified GV oocytes by restoring their DNA methylation levels. CONCLUSION In conclusion, vitrification of bovine GV oocytes significantly decreased the DNA methylation level of their in vitro derived MII oocytes, and 2μM Res improved their development ability by restoring DNA methylation level. IMPLICATIONS Our results provide an efficient approach to improve the maturation and fertilisation ability of vitrified GV oocytes.
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Affiliation(s)
- Peipei Zhang
- Institute of Animal Sciences (IAS), Chinese Academy of Agricultural Sciences (CAAS), No. 2 Yuanmingyuan Western Road, Haidian District, Beijing 100193, China
| | - Sha Yang
- Institute of Animal Sciences (IAS), Chinese Academy of Agricultural Sciences (CAAS), No. 2 Yuanmingyuan Western Road, Haidian District, Beijing 100193, China
| | - Hang Zhang
- Institute of Animal Sciences (IAS), Chinese Academy of Agricultural Sciences (CAAS), No. 2 Yuanmingyuan Western Road, Haidian District, Beijing 100193, China
| | - Haisheng Hao
- Institute of Animal Sciences (IAS), Chinese Academy of Agricultural Sciences (CAAS), No. 2 Yuanmingyuan Western Road, Haidian District, Beijing 100193, China
| | - Weihua Du
- Institute of Animal Sciences (IAS), Chinese Academy of Agricultural Sciences (CAAS), No. 2 Yuanmingyuan Western Road, Haidian District, Beijing 100193, China
| | - Jingjing Wang
- Institute of Animal Sciences (IAS), Chinese Academy of Agricultural Sciences (CAAS), No. 2 Yuanmingyuan Western Road, Haidian District, Beijing 100193, China
| | - Tong Hao
- Institute of Animal Sciences (IAS), Chinese Academy of Agricultural Sciences (CAAS), No. 2 Yuanmingyuan Western Road, Haidian District, Beijing 100193, China
| | - Huabin Zhu
- Institute of Animal Sciences (IAS), Chinese Academy of Agricultural Sciences (CAAS), No. 2 Yuanmingyuan Western Road, Haidian District, Beijing 100193, China
| | - Saqib Umer
- Institute of Animal Sciences (IAS), Chinese Academy of Agricultural Sciences (CAAS), No. 2 Yuanmingyuan Western Road, Haidian District, Beijing 100193, China
| | - Xueming Zhao
- Institute of Animal Sciences (IAS), Chinese Academy of Agricultural Sciences (CAAS), No. 2 Yuanmingyuan Western Road, Haidian District, Beijing 100193, China
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Bolton RL, Mooney A, Pettit MT, Bolton AE, Morgan L, Drake GJ, Appeltant R, Walker SL, Gillis JD, Hvilsom C. Resurrecting biodiversity: advanced assisted reproductive technologies and biobanking. REPRODUCTION AND FERTILITY 2022; 3:R121-R146. [PMID: 35928671 PMCID: PMC9346332 DOI: 10.1530/raf-22-0005] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Accepted: 06/30/2022] [Indexed: 11/21/2022] Open
Abstract
Biodiversity is defined as the presence of a variety of living organisms on the Earth that is essential for human survival. However, anthropogenic activities are causing the sixth mass extinction, threatening even our own species. For many animals, dwindling numbers are becoming fragmented populations with low genetic diversity, threatening long-term species viability. With extinction rates 1000–10,000 times greater than natural, ex situ and in situ conservation programmes need additional support to save species. The indefinite storage of cryopreserved (−196°C) viable cells and tissues (cryobanking), followed by assisted or advanced assisted reproductive technology (ART: utilisation of oocytes and spermatozoa to generate offspring; aART: utilisation of somatic cell genetic material to generate offspring), may be the only hope for species’ long-term survival. As such, cryobanking should be considered a necessity for all future conservation strategies. Following cryopreservation, ART/aART can be used to reinstate lost genetics back into a population, resurrecting biodiversity. However, for this to be successful, species-specific protocol optimisation and increased knowledge of basic biology for many taxa are required. Current ART/aART is primarily focused on mammalian taxa; however, this needs to be extended to all, including to some of the most endangered species: amphibians. Gamete, reproductive tissue and somatic cell cryobanking can fill the gap between losing genetic diversity today and future technological developments. This review explores species prioritisation for cryobanking and the successes and challenges of cryopreservation and multiple ARTs/aARTs. We here discuss the value of cryobanking before more species are lost and the potential of advanced reproductive technologies not only to halt but also to reverse biodiversity loss.
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Affiliation(s)
- Rhiannon L Bolton
- Nature’s SAFE, Chapel Field Stud, Ash Lane, Whitchurch, Shropshire, UK
| | | | - Matt T Pettit
- Nature’s SAFE, Chapel Field Stud, Ash Lane, Whitchurch, Shropshire, UK
- IMT International Limited, Tattenhall, Chester, UK
| | - Anthony E Bolton
- Nature’s SAFE, Chapel Field Stud, Ash Lane, Whitchurch, Shropshire, UK
| | - Lucy Morgan
- Gemini Genetics, Chapel Field Stud, Ash Lane, Whitchurch, UK
| | | | - Ruth Appeltant
- Nuffield Department of Women’s and Reproductive Health, University of Oxford, Women’s Centre, Level 3, John Radcliffe Hospital, Oxford, UK
| | - Susan L Walker
- Nature’s SAFE, Chapel Field Stud, Ash Lane, Whitchurch, Shropshire, UK
- Chester Zoo, Upton-by-Chester, UK
| | - James D Gillis
- South-East Zoo Alliance for Reproduction & Conservation, Yulee, Florida, USA
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Duarte-da-Fonseca Dias S, Palmeira-de-Oliveira A, Rolo J, Gomes-Ruivo P, Hélio Oliani A, Palmeira-de-Oliveira R, Martinez-de-Oliveira J, Pinto-de-Andrade L. Parameters influencing the maturation of bovine oocyte: a review. ANIMAL PRODUCTION SCIENCE 2022. [DOI: 10.1071/an21380] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Tharasanit T, Thuwanut P. Oocyte Cryopreservation in Domestic Animals and Humans: Principles, Techniques and Updated Outcomes. Animals (Basel) 2021; 11:ani11102949. [PMID: 34679970 PMCID: PMC8533007 DOI: 10.3390/ani11102949] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 10/05/2021] [Accepted: 10/06/2021] [Indexed: 12/25/2022] Open
Abstract
Oocyte cryopreservation plays important roles in basic research and the application of models for genetic preservation and in clinical situations. This technology provides long-term storage of gametes for genetic banking and subsequent use with other assisted reproductive technologies. Until recently, oocytes have remained the most difficult cell type to freeze, as the oocytes per se are large with limited surface area to cytoplasm ratio. They are also highly sensitive to damage during cryopreservation, and therefore the success rate of oocyte cryopreservation is generally poor when compared to noncryopreserved oocytes. Although advancement in oocyte cryopreservation has progressed rapidly for decades, the improvement of cryosurvival and clinical outcomes is still required. This review focuses on the principles, techniques, outcomes and prospects of oocyte cryopreservation in domestic animals and humans.
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Affiliation(s)
- Theerawat Tharasanit
- Department of Obstetrics, Gynecology and Reproduction, Faculty of Veterinary Science, Bangkok 10330, Thailand
- Veterinary Clinical Stem Cells and Bioengineering Research Unit, Chulalongkorn University, Bangkok 10330, Thailand
- Correspondence:
| | - Paweena Thuwanut
- Department of Obstetrics and Gynecology, Division of Reproductive Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand;
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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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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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Caffeine and oocyte vitrification: Sheep as an animal model. Int J Vet Sci Med 2019; 6:S41-S48. [PMID: 30761320 PMCID: PMC6161861 DOI: 10.1016/j.ijvsm.2018.01.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 01/20/2018] [Accepted: 01/20/2018] [Indexed: 11/21/2022] Open
Abstract
Oocyte cryopreservation is valuable way of preserving the female germ line. Vitrification of immature ovine oocytes decreased the levels of both maturation promoting factor (MPF) and mitogen-activated protein kinase (MAPK) in metaphase II (MII) oocytes after IVM. Our aims were 1) to evaluate the effects of vitrification of ovine GV-oocytes on spindle assembly, MPF/MAP kinases activities, and preimplantation development following IVM and IVF, 2) to elucidate the impact of caffeine supplementation during IVM on the quality and development of vitrified/warmed ovine GV-oocytes. Cumulus-oocyte complexes (COCs) from mature ewes were divided into vitrified, toxicity and control groups. Oocytes from each group were matured in vitro for 18 h in caffeine free IVM medium and denuded oocytes were incubated in maturation medium supplemented with 10 mM (+) or without (−) caffeine for another 6 h. At 24 h.p.m., oocytes were evaluated for spindle configuration, MPF/MAP kinases activities or fertilized and cultured in vitro for 7 days. Caffeine supplementation did not significantly affect the percentages of oocytes with normal spindle assembly in all the groups. Caffeine supplementation during IVM did not increase the activities of both kinases in vitrified groups. Cleavage and blastocyst development were significantly lower in vitrified groups than in control. Caffeine supplementation during the last 6 h of IVM did not significantly improve the cleavage and blastocyst rates in vitrified group. In conclusion, caffeine treatment during in vitro maturation has no positive impact on the quality and development of vitrified/warmed ovine GV-oocytes after IVM/IVF and embryo culture.
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Fathi M, Moawad AR, Badr MR. Production of blastocysts following in vitro maturation and fertilization of dromedary camel oocytes vitrified at the germinal vesicle stage. PLoS One 2018; 13:e0194602. [PMID: 29543888 PMCID: PMC5854426 DOI: 10.1371/journal.pone.0194602] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Accepted: 02/14/2018] [Indexed: 11/19/2022] Open
Abstract
Cryopreservation of oocytes would serve as an alternative to overcome the limited availability of dromedary camel oocytes and facilitate improvements in IVP techniques in this species. Our goal was to develop a protocol for the vitrification of camel oocytes at the germinal vesicle (GV) stage using different cryoprotectant combinations: 20% EG and 20% DMSO (VS1), 25% EG plus 25% DMSO (VS2) or 25% EG and 25% glycerol (VS3) and various cryo-carriers; straws or open pulled-straw (OPS) or solid surface vitrification (SSV); and Cryotop. Viable oocytes were cultured in vitro for 30 h. Matured oocytes were fertilized with epididymal spermatozoa and then cultured in vitro in modified KSOMaa medium for 7 days. Survival and nuclear maturation rates were significantly lower (P ≤ 0.05) in oocytes exposed to VS3 (44.8% and 34.0%, respectively) than those exposed to VS1 (68.2% and 48.0%, respectively) and VS2 (79.3% and 56.9%, respectively). Although recovery rates were significantly lower (P ≤ 0.05) in SSV and Cryotop vitrified oocytes (66.9% to 71.1%) than those vitrified by straws with VS1 or VS2 solutions (86.3% to 91.0%), survival rates were higher in the SSV and Cryotop groups (90.7% to 94.8%) than in the straw and OPS groups (68.2% to 86.5%). Among vitrified groups, maturation and fertilization rates were the highest in the Cryotop-VS2 group (51.8% and 39.2%, respectively). These values were comparable to those seen in the controls (59.2% and 44.6%, respectively). Cleavage (22.5% to 27.9%), morula (13.2% to 14.5%), and blastocyst (6.4% to 8.5%) rates were significantly higher (P ≤ 0.05) in SSV and Cryotop groups than in straws. No significant differences were observed in these parameters between the Cryotop and control groups. We report for the first time that dromedary oocytes vitrified at the GV-stage have the ability to be matured, fertilized and subsequently develop in vitro to produce blastocysts at frequencies comparable to those obtained using fresh oocytes.
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Affiliation(s)
- Mohamed Fathi
- Department of Theriogenology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - Adel R. Moawad
- Department of Theriogenology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
- * E-mail:
| | - Magdy R. Badr
- Department of Artificial Insemination and Embryo Transfer, Animal Reproduction Research Institute, Agriculture Research Centre, Giza, Egypt
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Ortiz-Escribano N, Bogado Pascottini O, Woelders H, Vandenberghe L, De Schauwer C, Govaere J, Van den Abbeel E, Vullers T, Ververs C, Roels K, Van De Velde M, Van Soom A, Smits K. An improved vitrification protocol for equine immature oocytes, resulting in a first live foal. Equine Vet J 2017; 50:391-397. [DOI: 10.1111/evj.12747] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Accepted: 08/06/2017] [Indexed: 11/30/2022]
Affiliation(s)
- N. Ortiz-Escribano
- Department of Reproduction, Obstetrics and Herd Health; Faculty of Veterinary Medicine; Ghent University; Merelbeke Belgium
| | - O. Bogado Pascottini
- Department of Reproduction, Obstetrics and Herd Health; Faculty of Veterinary Medicine; Ghent University; Merelbeke Belgium
| | - H. Woelders
- Animal Breeding and Genomics Centre; Wageningen UR Livestock Research; Wageningen the Netherlands
| | - L. Vandenberghe
- Department of Reproduction, Obstetrics and Herd Health; Faculty of Veterinary Medicine; Ghent University; Merelbeke Belgium
| | - C. De Schauwer
- Department of Reproduction, Obstetrics and Herd Health; Faculty of Veterinary Medicine; Ghent University; Merelbeke Belgium
| | - J. Govaere
- Department of Reproduction, Obstetrics and Herd Health; Faculty of Veterinary Medicine; Ghent University; Merelbeke Belgium
| | - E. Van den Abbeel
- Department for Reproductive Medicine; Ghent University Hospital; Ghent Belgium
| | - T. Vullers
- Animal Embryo Centre; Maria-Hoop the Netherlands
| | - C. Ververs
- Department of Reproduction, Obstetrics and Herd Health; Faculty of Veterinary Medicine; Ghent University; Merelbeke Belgium
| | - K. Roels
- Department of Reproduction, Obstetrics and Herd Health; Faculty of Veterinary Medicine; Ghent University; Merelbeke Belgium
| | - M. Van De Velde
- Department of Reproduction, Obstetrics and Herd Health; Faculty of Veterinary Medicine; Ghent University; Merelbeke Belgium
| | - A. Van Soom
- Department of Reproduction, Obstetrics and Herd Health; Faculty of Veterinary Medicine; Ghent University; Merelbeke Belgium
| | - K. Smits
- Department of Reproduction, Obstetrics and Herd Health; Faculty of Veterinary Medicine; Ghent University; Merelbeke Belgium
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Lee JY, Jung YG, Seo BB. Effects of culture media conditions on production of eggs fertilized in vitro of embryos derived from ovary of high grade Hanwoo. JOURNAL OF ANIMAL SCIENCE AND TECHNOLOGY 2016; 58:11. [PMID: 26933508 PMCID: PMC4772279 DOI: 10.1186/s40781-016-0093-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Accepted: 02/11/2016] [Indexed: 12/03/2022]
Abstract
Background This study was investigated the effects of culture media conditions on production of eggs fertilized in vitro of embryos from ovaries of high grade Korean native cow, Hanwoo. Methods The IVMD 101 and IVF 100 were used for in vitro maturation of selected Hanwoo oocytes and In vitro embryo culture after in vitro fertilization, respectively. The IVMD 101 and IVD 101 were used for in vitro culture and completely free of serum. Results The cleavage rates of 2-cell embryos in reference to Hanwoo oocytes were 86.7, 92.9 , and 90.1 % in the control group, IVDM101 medium and IVD101 medium, respectively which indicates that the IVDM101 medium and IVD101 medium may result favorable outcomes. The in vitro development rates of blastocysts were 12.4, 38.4 and 32.4 % in the control group, serum free IVMD101 medium and IVD101 medium, respectively. For hatched blastocysts, it was 5.3, 33.9, and 28.6 % in the control group, serum free IVMD101 medium and IVD101 medium, respectively. Hence, more favorable results were expected for the hatched blastocysts in which the IVMD101 medium and IVD101 medium were used than the control group. Average cell numbers of blastocysts were 128.3, 165.7, and 163.6 in the groups of TCM-199 + 10 % FBS medium, IVMD 101 medium, and IVD 101 medium, respectively which clearly show that the IVMD 101 and IVD 101 medium consequence significantly higher cell numbers compared to the control group (i.e., TCM-199 + 10 % FBS medium). Pregnancy rate after embryo transfer was 39.6 % when the serum free medium was used which is higher than that of the medium supplemented with serum (32.8 %). In addition, stillbirth rates were 4.9 % in the group of serum free medium whereas it was 13.6 % in the serum supplemented medium (13.6 %). Conclusions Taken altogether, serum free media, the IVMD 101 and IVD 101 represented more favorable results in the embryo development rate of embryos, cell numbers of blastocyst, and pregnancy rate. Of note, the IVMD 101 medium showed better outcomes hence, it might be a better option for future applications for in vitro culture of bovine embryos.
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Affiliation(s)
- Jun Young Lee
- Department of Animal Resources, Daegu University, Gyeongbuk, 38453 Korea.,Agricultural Technology Center, Gyeongbuk, 39687 Korea
| | - Yun Gil Jung
- Department of Animal Resources, Daegu University, Gyeongbuk, 38453 Korea.,ETbiotech, Jeollnam do, 57344 Korea
| | - Byoung Boo Seo
- Department of Animal Resources, Daegu University, Gyeongbuk, 38453 Korea
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Matos JE, Marques CC, Moura TF, Baptista MC, Horta AEM, Soveral G, Pereira RMLN. Conjugated linoleic acid improves oocyte cryosurvival through modulation of the cryoprotectants influx rate. Reprod Biol Endocrinol 2015; 13:60. [PMID: 26066493 PMCID: PMC4465151 DOI: 10.1186/s12958-015-0059-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2015] [Accepted: 06/03/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND In cryopreservation, oocytes are subjected to extreme hyperosmotic conditions, inducing large volume changes that, along with an abrupt temperature drop, interfere with their developmental competence. Our objectives in this work were to find conditions enabling an increase in oocyte cryosurvival and subsequent development. METHODS Abattoir-derived bovine oocytes were cultured without (Control group) or with trans-10,cis-12 conjugated linoleic acid isomer (CLA group). Comparative observations were made for 1) the oocyte developmental competence after exposure to cryoprotectants followed or not by vitrification/warming, 2) the oocyte membrane permeability to water (using the non-permeant cryoprotectant sucrose) and 3) the oocyte membrane permeability to two cryoprotectants (ethylene glycol, EG, and dimethyl sulfoxide, DMSO). Mature oocytes cultured with or without CLA and vitrified/warmed or only exposed to cryoprotectants without vitrification were subjected to in vitro fertilization; embryo culture proceeded until the blastocyst stage. The oocyte membrane permeabilities to water and cryoprotectants were estimated using mature oocytes subjected to hyperosmotic challenges. For water permeability, 200 mM sucrose was used, whereas for the cryoprotectant permeability, a 10 % solution of both EG and DMSO was used. The data were analyzed using the MIXED procedure and Student's T-test. RESULTS CLA supplementation improves the developmental competence of vitrified/warmed and cryoprotectants exposed oocytes (p < 0.01) and reduces their membrane permeability to water (37 %, p < 0.001) and to cryoprotectants (42 %, p < 0.001). CONCLUSIONS By slowing the fluxes of water and of permeant cryoprotectants, CLA contributed to improved oocyte cryosurvival and post-thawed viability. This isomer supplementation to the maturation media should be considered when designing new protocols for oocyte cryopreservation.
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Affiliation(s)
- Joana E Matos
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto, Universidade de Lisboa, 1649-003, Lisbon, Portugal.
| | - Carla C Marques
- INIAV, Unidade de Biotecnologias e Recursos Genéticos, Quinta da Fonte Boa, 2005-048, Vale de Santarém, Portugal.
| | - Teresa F Moura
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto, Universidade de Lisboa, 1649-003, Lisbon, Portugal.
- Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Monte de Caparica, 2829-516, Caparica, Portugal.
| | - Maria C Baptista
- INIAV, Unidade de Biotecnologias e Recursos Genéticos, Quinta da Fonte Boa, 2005-048, Vale de Santarém, Portugal.
| | - Antonio E M Horta
- INIAV, Unidade de Biotecnologias e Recursos Genéticos, Quinta da Fonte Boa, 2005-048, Vale de Santarém, Portugal.
| | - Graça Soveral
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto, Universidade de Lisboa, 1649-003, Lisbon, Portugal.
- Departamento Bioquímica e Biologia Humana, Faculdade de Farmácia, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003, Lisbon, Portugal.
| | - Rosa M L N Pereira
- INIAV, Unidade de Biotecnologias e Recursos Genéticos, Quinta da Fonte Boa, 2005-048, Vale de Santarém, Portugal.
- Escola Universitária Vasco da Gama, Campus Universitário de Lordemão, 3020-210, Coimbra, Portugal.
- CIISA, Faculdade de Medicina Veterinária da Universidade de Lisboa, Avenida da Universidade Técnica, 1300-477, Lisbon, Portugal.
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Cryopreservation of mammalian oocytes and embryos: current problems and future perspectives. SCIENCE CHINA-LIFE SCIENCES 2014; 57:903-14. [DOI: 10.1007/s11427-014-4689-z] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2013] [Accepted: 02/03/2014] [Indexed: 01/19/2023]
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15
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Herraiz S, Novella-Maestre E, Rodríguez B, Díaz C, Sánchez-Serrano M, Mirabet V, Pellicer A. Improving ovarian tissue cryopreservation for oncologic patients: slow freezing versus vitrification, effect of different procedures and devices. Fertil Steril 2014; 101:775-84. [DOI: 10.1016/j.fertnstert.2013.11.016] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Revised: 10/22/2013] [Accepted: 11/12/2013] [Indexed: 11/24/2022]
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16
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Effects of resveratrol on vitrified porcine oocytes. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2013; 2013:920257. [PMID: 24223236 PMCID: PMC3816072 DOI: 10.1155/2013/920257] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Accepted: 08/31/2013] [Indexed: 01/29/2023]
Abstract
Vitrified MII porcine oocytes are characterized by reduced developmental competence, associated with the activation of the apoptotic pathway. Resveratrol (R), a polyphenolic compound present in several vegetal sources, has been reported to exert, among all its other biological effects, an antiapoptotic one. The aim of this study was to determine the effects of R (2 µM) on the apoptotic status of porcine oocytes vitrified by Cryotop method, evaluating phosphatidylserine (PS) exteriorization and caspases activation. R was added during IVM (A); 2 h postwarming incubation (B); vitrification/warming and 2 h postwarming incubation (C); all previous phases (D). Data on PS exteriorization showed, in each treated group, a significantly higher (P < 0.05) percentage of live nonapoptotic oocytes as compared with CTR; moreover, the percentage of live apoptotic oocytes was significantly (P < 0.05) lower in all R-treated groups relative to CTR. The results on caspase activation showed a tendency to an increase of viable oocytes with inactive caspases in B, C, and D, while a significant (P < 0.05) increase in A compared to CTR was recorded. These data demonstrate that R supplementation in various phases of IVM and vitrification/warming procedure can modulate the apoptotic process, improving the resistance of porcine oocytes to cryopreservation-induced damage.
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Dutta DJ, Dev H, Raj H. In vitro blastocyst development of post-thaw vitrified bovine oocytes. Vet World 2013. [DOI: 10.14202/vetworld.2013.730-733] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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18
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Zhou GB, Zeng Y, Meng QG, Liu Y, Dai YP, Zhu SE, Bunch TD, Hou YP. Decreased Expression of CD9 in Bovine Oocytes After Cryopreservation and the Relationship to Fertilization Capacity. Mol Reprod Dev 2013; 80:451-9. [DOI: 10.1002/mrd.22181] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2012] [Accepted: 04/04/2013] [Indexed: 01/08/2023]
Affiliation(s)
- Guang-Bin Zhou
- Institute of Animal Genetics and Breeding; College of Animal Science and Technology, Sichuan Agricultural University (Chengdu Campus); Wenjiang, P.R. China
- State Key Laboratory for Agrobiotechnology; College of Biological Sciences, and College of Animal Science and Technology, China Agricultural University; Beijing, P.R. China
| | - Yan Zeng
- State Key Laboratory for Agrobiotechnology; College of Biological Sciences, and College of Animal Science and Technology, China Agricultural University; Beijing, P.R. China
| | - Qing-Gang Meng
- Department of Animal, Dairy, and Veterinary Sciences; Utah State University; Logan, Utah
| | - Ying Liu
- State Key Laboratory for Agrobiotechnology; College of Biological Sciences, and College of Animal Science and Technology, China Agricultural University; Beijing, P.R. China
- Department of Animal Science; Aarhus University; Tjele Denmark
| | - Yun-Ping Dai
- State Key Laboratory for Agrobiotechnology; College of Biological Sciences, and College of Animal Science and Technology, China Agricultural University; Beijing, P.R. China
| | - Shi-En Zhu
- State Key Laboratory for Agrobiotechnology; College of Biological Sciences, and College of Animal Science and Technology, China Agricultural University; Beijing, P.R. China
| | - Thomas D. Bunch
- Department of Animal, Dairy, and Veterinary Sciences; Utah State University; Logan, Utah
| | - Yun-Peng Hou
- State Key Laboratory for Agrobiotechnology; College of Biological Sciences, and College of Animal Science and Technology, China Agricultural University; Beijing, P.R. China
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Zhou GB, Li N. Bovine Oocytes Cryoinjury and How to Improve Their Development Following Cryopreservation. Anim Biotechnol 2013; 24:94-106. [DOI: 10.1080/10495398.2012.755466] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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20
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Amorim CA, Curaba M, Van Langendonckt A, Dolmans MM, Donnez J. Vitrification as an alternative means of cryopreserving ovarian tissue. Reprod Biomed Online 2011; 23:160-86. [DOI: 10.1016/j.rbmo.2011.04.005] [Citation(s) in RCA: 115] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2010] [Revised: 03/10/2011] [Accepted: 04/14/2011] [Indexed: 10/18/2022]
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21
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Moawad AR, Choi I, Zhu J, Campbell KH. Ovine Oocytes Vitrified at Germinal Vesicle Stage as Cytoplast Recipients for Somatic Cell Nuclear Transfer (SCNT). Cell Reprogram 2011; 13:289-96. [DOI: 10.1089/cell.2010.0089] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Affiliation(s)
- Adel R. Moawad
- Animal Development and Biotechnology Group, Division of Animal Sciences, School of Biosciences, University of Nottingham, Loughborough, LE12 5RD, United Kingdom
| | - Inchul Choi
- Animal Development and Biotechnology Group, Division of Animal Sciences, School of Biosciences, University of Nottingham, Loughborough, LE12 5RD, United Kingdom
| | - Jie Zhu
- Animal Development and Biotechnology Group, Division of Animal Sciences, School of Biosciences, University of Nottingham, Loughborough, LE12 5RD, United Kingdom
| | - Keith H.S. Campbell
- Animal Development and Biotechnology Group, Division of Animal Sciences, School of Biosciences, University of Nottingham, Loughborough, LE12 5RD, United Kingdom
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Prentice JR, Anzar M. Cryopreservation of Mammalian oocyte for conservation of animal genetics. Vet Med Int 2010; 2011. [PMID: 20886016 PMCID: PMC2945659 DOI: 10.4061/2011/146405] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2010] [Accepted: 08/09/2010] [Indexed: 11/24/2022] Open
Abstract
The preservation of the female portion of livestock genetics has become an international priority; however, in situ conservation strategies are extremely expensive. Therefore, efforts are increasingly focusing on the development of a reliable cryopreservation method for oocytes, in order to establish ova banks. Slow freezing, a common method for cryopreservation of oocytes, causes osmotic shock (solution effect) and intracellular ice crystallization leading to cell damage. Vitrification is an alternative method for cryopreservation in which cells are exposed to a higher concentration of cryoprotectants and frozen with an ultra rapid freezing velocity, resulting in an ice crystal free, solid glass-like structure. Presently, vitrification is a popular method for cryopreservation of embryos. However, vitrification of oocytes is still challenging due to their complex structure and sensitivity to chilling.
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Affiliation(s)
- Jennifer R Prentice
- Canadian Animal Genetic Resources, Agriculture and Agri-Food Canada, Saskatoon Research Centre, 107 Science Place, Saskatoon, SK, Canada S7N 0X2
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23
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Zhou X, Al Naib A, Sun D, Lonergan P. Bovine oocyte vitrification using the Cryotop method: Effect of cumulus cells and vitrification protocol on survival and subsequent development. Cryobiology 2010; 61:66-72. [DOI: 10.1016/j.cryobiol.2010.05.002] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2010] [Revised: 05/05/2010] [Accepted: 05/10/2010] [Indexed: 11/28/2022]
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Turathum B, Saikhun K, Sangsuwan P, Kitiyanant Y. Effects of vitrification on nuclear maturation, ultrastructural changes and gene expression of canine oocytes. Reprod Biol Endocrinol 2010; 8:70. [PMID: 20565987 PMCID: PMC2916914 DOI: 10.1186/1477-7827-8-70] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2010] [Accepted: 06/22/2010] [Indexed: 12/03/2022] Open
Abstract
BACKGROUND Cryopreservation of oocytes, which is an interesting procedure to conserve female gametes, is an essential part of reproductive biotechnology. The objective of the present study was to investigate the effects of vitrification on nuclear maturation, ultrastructural changes and gene expression of canine oocytes. METHODS Immature oocytes (germinal vesicles) isolated from ovaries of normal bitches (> 6 months of age) were either vitrified in open pulled straw (OPS) using 20% ethylene glycol (EG) and 20% dimethyl sulfoxide (DMSO) as vitrification solution or exposed to vitrification solution without subjected to liquid nitrogen. After warming, oocytes were investigated for nuclear maturation following in vitro maturation (IVM), ultrastructural changes using transmission electron microscopy (TEM) and gene expression using RT-PCR. Fresh immature oocytes were used as the control group. RESULTS The rate of resumption of meiosis in vitrified-warmed oocytes (53.4%) was significantly (P < 0.05) lower than those of control (93.8%) and exposure (91.4%) groups. However, there were no statistically significant differences among groups in the rates of GV oocytes reaching the maturation stage (metaphase II, MII). The ultrastructural alterations revealed by TEM showed that cortical granules, mitochondria, lipid droplets and smooth endoplasmic reticulum (SER) were affected by vitrification procedures. RT-PCR analysis for gene expression revealed no differences in HSP70, Dnmt1, SOD1 and BAX genes among groups, whereas Bcl2 was strongly expressed in vitrified-warmed group when compared to the control. CONCLUSION Immature canine oocytes were successfully cryopreserved, resumed meiosis and developed to the MII stage. The information obtained in this study is crucial for the development of an effective method to cryopreserve canine oocytes for establishment of genetic banks of endangered canid species.
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Affiliation(s)
- Bongkoch Turathum
- Department of Anatomy, Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand
| | - Kulnasan Saikhun
- Institute of Molecular Biosciences, Mahidol University, Nakhon Pathom 73170, Thailand
| | - Parisatcha Sangsuwan
- Institute of Molecular Biosciences, Mahidol University, Nakhon Pathom 73170, Thailand
| | - Yindee Kitiyanant
- Department of Anatomy, Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand
- Institute of Molecular Biosciences, Mahidol University, Nakhon Pathom 73170, Thailand
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Lowther KM, Weitzman VN, Maier D, Mehlmann LM. Maturation, fertilization, and the structure and function of the endoplasmic reticulum in cryopreserved mouse oocytes. Biol Reprod 2009; 81:147-54. [PMID: 19299317 DOI: 10.1095/biolreprod.108.072538] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Oocyte cryopreservation is a promising technology that could benefit women undergoing assisted reproduction. Most studies examining the effects of cryopreservation on fertilization and developmental competence have been done using metaphase II-stage oocytes, while fewer studies have focused on freezing oocytes at the germinal vesicle (GV) stage, followed by in vitro maturation. Herein, we examined the effects of vitrifying GV-stage mouse oocytes on cytoplasmic structure and on the ability to undergo cytoplasmic changes necessary for proper fertilization and early embryonic development. We examined the endoplasmic reticulum (ER) as one indicator of cytoplasmic structure, as well as the ability of oocytes to develop Ca(2+) release mechanisms following vitrification and in vitro maturation. Vitrified GV-stage oocytes matured in culture to metaphase II at a rate comparable to that of controls. These oocytes had the capacity to release Ca(2+) following injection of inositol 1,4,5-trisphosphate, demonstrating that Ca(2+) release mechanisms developed during meiotic maturation. The ER remained intact during the vitrification procedure as assessed using the lipophilic fluorescent dye DiI. However, the reorganization of the ER that occurs during in vivo maturation was impaired in oocytes that were vitrified before oocyte maturation. These results show that vitrification of GV-stage oocytes does not affect nuclear maturation or the continuity of the ER, but normal cytoplasmic maturation as assessed by the reorganization of the ER is disrupted. Deficiencies in factors that are responsible for proper ER reorganization during oocyte maturation could contribute to the low developmental potential previously reported in vitrified in vitro-matured oocytes.
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Affiliation(s)
- Katie M Lowther
- Department of Cell Biology, University of Connecticut Health Center, Farmington, Connecticut 06030, USA
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