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Hartzler KE, McCartney C, Songsasen N, Nagashima JB. Cryopreservation of African painted dog (Lycaon pictus) ovarian tissue. Front Vet Sci 2023; 10:1134726. [PMID: 37008351 PMCID: PMC10063916 DOI: 10.3389/fvets.2023.1134726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Accepted: 02/27/2023] [Indexed: 03/19/2023] Open
Abstract
Development of techniques for the preservation and use of gonadal tissues are increasingly needed for the genetic management of the endangered African painted dog (Lycaon pictus). Here we evaluated two cryopreservation techniques for ovarian tissue (2 × 2 × 1 mm3 fragments, n = 11 individuals): needle immersed vitrification (NIV), with equilibration in a 7.5% dimethyl sulfoxide (DMSO) and 7.5% ethylene glycol (EG) solution, and vitrification in a 15% DMSO, 15% EG, and 0.5 M sucrose solution, and slow freezing in cryovials with either the equilibration (SF-E) or vitrification (SF-V) solutions. Following warming, tissues were either fixed and embedded for evaluation of density of morphologically normal follicles, semi-quantitative scoring of stromal cell preservation, and apoptotic index (TUNEL stain), and/or flash-frozen for expression of proliferation (PCNA), apoptosis (CASP3, BCL2), or oxidative stress (GPX3, SOD1, SOD2) pathway genes (n = 4). Needle immersed vitrification maintained higher density of morphologically normal follicles compared to the slow freezing protocols applied (p < 0.05), with no significant changes in expression of select genes among treatment groups. A slight increase in apoptotic index was observed in all cryopreservation groups, but only reached significance in SF-E compared with fresh tissue controls (p < 0.05). Future research should be dedicated to developing improved methods for ovarian tissue culture in the species, both as a means to evaluate the efficacy of tissue cryopreservation techniques and for the production of viable oocytes from banked ovarian tissue in the endangered African painted dog.
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Vilela JDMV, Dolmans MM, Amorim CA. Ovarian tissue transportation: a systematic review. Reprod Biomed Online 2020; 42:351-365. [PMID: 33288476 DOI: 10.1016/j.rbmo.2020.11.001] [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: 08/04/2020] [Revised: 11/06/2020] [Accepted: 11/06/2020] [Indexed: 12/20/2022]
Abstract
In recent years, some countries and fertility preservation networks have started adopting 24 h transportation for ovarian tissue, a practice that has the potential to spread very quickly due to the high costs and bureaucracy involved in the establishment of ovarian tissue cryobanks. While pregnancies and live births have been reported after such long periods of transportation, this, however, remains an empirical procedure. This review aims to prompt reflection on ovarian tissue transport, highlighting the lack of knowledge in humans by providing a counterpoint looking into more than 40 studies published in different animal models. By discussing these studies in animals, the findings of various models can be deciphered, and light shed on the patterns identified. Like the development of different assisted reproductive technology procedures, this is an important step in creating guidelines for future studies on human ovarian tissue transportation.
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Affiliation(s)
| | - Marie-Madeleine Dolmans
- Pôle de Recherche en Gynécologie, Institut de Recherche Expérimentale et Clinique, Université Catholique de Louvain, Brussels, Belgium; Gynecology Department, Cliniques Universitaires Saint-Luc, Brussels, Belgium
| | - Christiani Andrade Amorim
- Pôle de Recherche en Gynécologie, Institut de Recherche Expérimentale et Clinique, Université Catholique de Louvain, Brussels, Belgium.
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3
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Vilela JDMV, Dolmans MM, Maruhashi E, Blackman MCNM, Sonveaux P, Miranda-Vilela AL, Amorim CA. Evidence of metabolic activity during low-temperature ovarian tissue preservation in different media. J Assist Reprod Genet 2020; 37:2477-2486. [PMID: 32885380 PMCID: PMC7550475 DOI: 10.1007/s10815-020-01935-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Accepted: 08/25/2020] [Indexed: 12/17/2022] Open
Abstract
PURPOSE Although ovarian tissue transportation has been validated for up to 24 h, there is no standard protocol to date. We aimed to elucidate how existing media currently used for ovarian tissue transportation affect ovarian tissue metabolism and cell viability. METHODS Cow ovarian fragments were immersed in 0.9% NaCl solution, IVF medium, Leibovitz 15 medium (L-15), or PBS for 1, 4, or 24 h at 4 °C. Media were analyzed for pH, lactate dehydrogenase (LDH) activity, and glucose, pyruvate, and lactate concentrations, while apoptosis was assessed by TUNEL assays in fixed fragments. Viability rates were assessed by flow cytometry (FACS). RESULTS There were lower pH levels in NaCl at all time points compared with other media. LDH activity increased with time and was lowest in NaCl at 1 and 4 h. There was no significant difference in glucose levels, but a significant pyruvate decrease in L-15 and a significant lactate increase in all media. TUNEL showed apoptosis rates ranging from 0 to 5%. FACS showed a mean of 4% necrotic cells and 15-19% apoptotic cells after 1 h of incubation, but less than 1% necrotic cells and 2-6% apoptotic cells after 24 h in all media. CONCLUSION Our results indicate marked metabolic activity in ovarian tissue at 4 °C and suggest that cells use internal sources of energy, which may influence transplantation outcomes. This highlights the importance of better understanding whole tissue dynamics to develop a standard protocol for ovarian tissue transportation. Graphical abstract.
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Affiliation(s)
- Janice de M V Vilela
- Pôle de Recherche en Gynécologie, Institut de Recherche Expérimentale et Clinique, Université Catholique de Louvain, Avenue Mounier 52, bte B1.52.02, 1200, Brussels, Belgium
| | - Marie-Madeleine Dolmans
- Pôle de Recherche en Gynécologie, Institut de Recherche Expérimentale et Clinique, Université Catholique de Louvain, Avenue Mounier 52, bte B1.52.02, 1200, Brussels, Belgium
- Gynecology Department, Cliniques Universitaires Saint Luc, 1200, Brussels, Belgium
| | - Emi Maruhashi
- Pôle de Recherche en Gynécologie, Institut de Recherche Expérimentale et Clinique, Université Catholique de Louvain, Avenue Mounier 52, bte B1.52.02, 1200, Brussels, Belgium
| | - Marine C N M Blackman
- Pôle de Pharmacologie et Thérapeutique, Institut de Recherche Expérimentale et Clinique, Université Catholique de Louvain, 1200, Brussels, Belgium
| | - Pierre Sonveaux
- Pôle de Pharmacologie et Thérapeutique, Institut de Recherche Expérimentale et Clinique, Université Catholique de Louvain, 1200, Brussels, Belgium
| | | | - Christiani A Amorim
- Pôle de Recherche en Gynécologie, Institut de Recherche Expérimentale et Clinique, Université Catholique de Louvain, Avenue Mounier 52, bte B1.52.02, 1200, Brussels, Belgium.
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Effect of melatonin supplementation in the long-term preservation of the sheep ovaries at different temperatures and subsequent in vitro embryo production. Theriogenology 2018; 106:265-270. [DOI: 10.1016/j.theriogenology.2017.10.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2017] [Revised: 10/01/2017] [Accepted: 10/07/2017] [Indexed: 12/14/2022]
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5
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Correia H, Vieira L, Maside C, Paes V, Silva R, Alves B, Santos F, Apgar G, Rodrigues A, Figueiredo J. Ovarian transport temperature (4 vs 33 °C) impacts differently the in vitro development of isolated goat preantral and antral follicles. Small Rumin Res 2017. [DOI: 10.1016/j.smallrumres.2017.09.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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6
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Duncan FE, Zelinski M, Gunn AH, Pahnke JE, O'Neill CL, Songsasen N, Woodruff RI, Woodruff TK. Ovarian tissue transport to expand access to fertility preservation: from animals to clinical practice. Reproduction 2016; 152:R201-R210. [PMID: 27492079 DOI: 10.1530/rep-15-0598] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Accepted: 08/04/2016] [Indexed: 12/13/2022]
Abstract
Primordial follicles dictate a female's reproductive life span and therefore are central to fertility preservation for both endangered species and individuals with fertility-threatening conditions. Ovarian tissue containing primordial follicles can be cryopreserved and later thawed and transplanted back into individuals to restore both endocrine function and fertility. Importantly, increasing numbers of human live births have been reported following ovarian tissue cryopreservation and transplantation. A current limitation of this technology is patient access to sites that are approved or equipped to process and cryopreserve ovarian tissue - especially in larger countries or low resource settings. Here, we review empirical evidence from both animal models and human studies that suggest that ovarian tissue can be transported at cold temperatures for several hours while still maintaining the integrity and reproductive potential of the primordial follicles within the tissue. In fact, several human live births have been reported in European countries using tissue that was transported at cold temperatures for up to 20 h before cryopreservation and transplantation. Ovarian tissue transport, if implemented widely in clinical practice, could therefore expand both patient and provider access to emerging fertility preservation options.
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Affiliation(s)
- Francesca E Duncan
- Department of Obstetrics and GynecologyFeinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Mary Zelinski
- Oregon National Primate Research CenterBeaverton, Oregon, USA
| | - Alexander H Gunn
- Department of Obstetrics and GynecologyFeinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Jennifer E Pahnke
- Department of Obstetrics and GynecologyFeinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Conor L O'Neill
- Department of Obstetrics and GynecologyFeinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | | | - Ryan I Woodruff
- Department of Obstetrics and GynecologyFeinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Teresa K Woodruff
- Department of Obstetrics and GynecologyFeinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
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7
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Evecen M, Cirit Ü, Demir K, Hamzaoğlu A, Bakırer G, Pabuccuoğlu S, Birler S. Adding hormones sequentially could be an effective approach for IVM of dog oocytes. Theriogenology 2011; 75:1647-51. [DOI: 10.1016/j.theriogenology.2011.01.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2010] [Revised: 10/26/2010] [Accepted: 01/04/2011] [Indexed: 10/18/2022]
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8
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Lin YA, Tsai HB, Liao MH, Chen MC. Effect of Preserving Condition of Porcine Ovaries on the Development of In Vitro Matured Oocytes. Reprod Domest Anim 2011; 46:333-7. [DOI: 10.1111/j.1439-0531.2010.01671.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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9
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Effect of storage temperature during transport of ovaries on in vitro embryo production in Iberian red deer (Cervus elaphus hispanicus). Theriogenology 2011; 75:65-72. [DOI: 10.1016/j.theriogenology.2010.07.011] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2009] [Revised: 07/12/2010] [Accepted: 07/18/2010] [Indexed: 11/24/2022]
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10
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Park JH, Maclaughlin DT, Teixeira JM. The rate of in vitro maturation of primary follicles from adult mice and the quality of oocytes is improved in the absence of anti-mullerian hormone. Reprod Sci 2010; 18:334-41. [PMID: 21098214 DOI: 10.1177/1933719110388294] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Anti-Müllerian hormone (AMH) inhibits the recruitment of primordial follicles into the growing pool, but its role in primary and secondary follicles is not clear. We isolated primary follicles from the ovaries of 9- to 10-week old mice and examined whether AMH affected follicular development. Follicles were matured in media that was prepared using unsexed fetal bovine serum (FBS) or female FBS (FFBS) with or without added AMH for approximately 2 weeks and maturation rates to secondary follicles and metaphase II (MII) oocytes were measured by standard morphological criteria. Rates of parthenogenetic activation and in vitro fertilization (IVF) were assessed by cleavage and blastocyst development, respectively. Whereas addition of AMH blocked primary to secondary follicle transition, the primary to secondary and secondary to MII follicle maturation rates was significantly improved with FFBS. Folliculogenesis resumed once AMH was removed from the media of the arrested primary follicles. The rates of IVF and parthenogenesis of oocytes after in vitro maturation (IVM) without AMH were also improved compared to controls. The results indicate that removal of AMH from culture conditions during IVM from primary follicular stages should be considered to improve outcome.
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Affiliation(s)
- Joo Hyun Park
- Vincent Center for Reproductive Biology, Department of Obstetrics and Gynecology, MA 02114, USA
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11
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Lima G, Costa L, Cavalcanti D, Rodrigues C, Freire F, Fontenele-Neto J, Silva A. Short-term storage of canine preantral ovarian follicles using a powdered coconut water (ACP®)-based medium. Theriogenology 2010; 74:146-52. [DOI: 10.1016/j.theriogenology.2010.01.025] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2009] [Revised: 01/18/2010] [Accepted: 01/30/2010] [Indexed: 11/16/2022]
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12
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Evecen M, Cirit U, Demir K, Ozdaş OB, Taş M, Birler S, Pabuccuoğlu S. Effects of estrous cycle stage and transport temperature of ovaries on in vitro maturation of canine oocytes. Anim Reprod Sci 2009; 117:160-5. [PMID: 19375251 DOI: 10.1016/j.anireprosci.2009.03.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2008] [Revised: 02/23/2009] [Accepted: 03/13/2009] [Indexed: 11/18/2022]
Abstract
Unlike other domestic animals, in vitro maturation (IVM) of canine oocytes still has limited success. The present study investigated the effects of estrous cycle stage and transport temperature of ovaries on in vitro maturation of canine oocytes. The donor bitches were categorized into three groups based on stage of estrus cycle: follicular (proestrus or estrous), luteal (diestrus) and anestrus. One ovary of each pair collected from 39 mature bitches was transported in Phosphate Buffer Saline (PBS) at 4 degrees C while the other was transported at 37 degrees C. A total of 1138 Grade I COCs obtained from all ovaries were grouped and matured in modified synthetic oviduct fluid (mSOF) supplemented with follicle stimulating hormone (FSH), luteinizing hormone (LH), essential and non-essential amino acids at 38.5 degrees C in a humidified 5% CO(2), 5% O(2), and 90% N(2) atmosphere for 72 h. The nuclear maturation rates were evaluated by aceto-orcein staining. Oocytes harvested from follicular and luteal ovaries have a significantly higher maturation rates (MI+MII) than the oocytes from anestrual ovaries in the 37 degrees C group (p<0.05). However, oocytes harvested from anestrual ovaries transported at 4 degrees C had the highest maturation (MI+MII) rate, and the difference between anestrual and luteal ovary groups was significant (p<0.05). The oocytes from anestrual ovaries transported at 4 degrees C have significantly higher maturation rates than those transported at 37 degrees C (p<0.0001). However, the transport temperature (37 or 4 degrees C) did not significantly affect the maturation (MI+MII) rates of oocytes harvested from the luteal (p=0.61) and follicular (p=0.48) stage ovaries. It can be concluded from this study that (1) both transport temperature and transport temperaturexestrus cycle stage interaction effected the maturation rates, while estrus cycle stage alone did not, and (2) transporting canine ovaries at 4 degrees C can improve in vitro maturation rates in oocytes harvested from anestrous ovaries.
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Affiliation(s)
- Mithat Evecen
- Department of Reproduction and Artificial Insemination, Faculty of Veterinary Medicine, Istanbul University, 34320 Avcilar, Istanbul, Turkey
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13
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Lunn MO, Wright SJ. Imaging the zona pellucida of canine and feline oocytes using scanning electron microscopy. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2009; 15:2-14. [PMID: 19144252 DOI: 10.1017/s1431927609090084] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Ultrastructure of the zona pellucida (ZP) of canine and feline oocytes has not been fully investigated. The objective of the study was to evaluate the potential use of the low vacuum scanning electron microscope (LVSEM) with oocytes. This required development of a method to prepare canine and feline cumulus-oocyte complexes (COCs) for LVSEM to provide ultrastructural information on the ZP. COCs were collected from ovaries, and cumulus cells were either partially or completely removed to reveal the ZP. COCs and zona-intact oocytes were fixed at 4 degrees C for 1 h in 2.5% glutaraldehyde in 0.1 M sodium cacodylate buffer, pH 7.4 and subsequently viewed wet or further processed by critical point drying, and viewed uncoated or sputter coated with gold. Although the spongy surface of the ZP was visible at low vacuum in uncoated oocytes, coated oocytes had more details at high vacuum. The ZP surface of canine and feline oocytes contained numerous various-sized, spherical or elliptical pores that narrowed centripetally splitting into several smaller, deep pores. The round to oblong cumulus cells tightly surrounded the ZP. Each corona radiata cumulus cell tapered into a thin projection that entered the ZP. Our detailed techniques will enable future studies connecting ultrastructural and molecular aspects of oocyte maturation and development in mammals.
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Affiliation(s)
- Matthew O Lunn
- Department of Biology, University of Dayton, 300 College Park Avenue, Dayton, OH 45469-2320, USA
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Evecen M, Cirit U, Demir K, Karaman E, Hamzaoğlu AI, Bakirer G. Developmental competence of domestic cat oocytes from ovaries stored at various durations at 4 degrees C temperature. Anim Reprod Sci 2009; 116:169-72. [PMID: 19231113 DOI: 10.1016/j.anireprosci.2009.01.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2008] [Revised: 01/07/2009] [Accepted: 01/19/2009] [Indexed: 11/29/2022]
Abstract
Temporal storage of ovaries can provide opportunity to rescue oocytes from ovaries of endangered felids. The objective of the study was to examine the effect of different storage periods (2, 24 and 48h) of ovaries at 4 degrees C for maturation of cat oocytes in vitro. Ovaries were collected from 25 domestic cats at various stages of the estrous cycle by routine ovariohysterectomy following anesthesia at different local veterinary clinics, and maintained in physiological saline at 4 degrees C for 2, 24 or 48h until oocytes recovery. Selected COCs were maturated at 38 degrees C for 48h in four-well petri dishes, which included 500microL modified synthetic oviduct fluid (mSOF) medium under mineral oil in a humidified 5% CO(2), 5% O(2), and 90% N(2) atmosphere incubator. After the in vitro maturation period, there were no differences between the rate of oocytes matured at MII stages in 2 and 24h storage groups (50.7% and 48.2% respectively, p>0.05). However, the same result for the 48h group was significantly lower than the 2 and 24h groups (28.0%, p<0.001). Our results suggest that while 2 or 24h storage of ovaries at 4 degrees C does not affect the meiotic competence of oocytes in vitro, 48h storage of ovaries decrease the results dramatically.
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Affiliation(s)
- Mithat Evecen
- Department of Reproduction and Artificial Insemination, Istanbul University, Avcilar, Turkey
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15
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Lopes CAP, dos Santos RR, Celestino JJDH, Melo MAP, Chaves RN, Campello CC, Silva JRV, Báo SN, Jewgenow K, de Figueiredo JR. Short-term preservation of canine preantral follicles: Effects of temperature, medium and time. Anim Reprod Sci 2008; 115:201-14. [PMID: 19185435 DOI: 10.1016/j.anireprosci.2008.12.016] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2008] [Revised: 11/06/2008] [Accepted: 12/10/2008] [Indexed: 10/21/2022]
Abstract
The use of the large pool of preantral follicles is a promising alternative to provide high numbers of fertilizable oocytes to reproductive biotechnology. This issue is particularly important to canids, since current rates of success of in vitro techniques using oocytes are very limited, and many species within this family are threatened by extinction. The aim of this study was to evaluate effects of temperature, medium and time on morphology and viability of canine preantral follicles during short-term preservation. Canine ovaries were cut into fragments which were incubated in 0.9% NaCl solution or in minimum essential medium (MEM) at 4, 20 or 38 degrees C for 2, 6, 12 or 24 h. Afterwards, preantral follicles were analyzed by histology, transmission electron microscopy and viability testing using trypan blue, calcein-AM and ethidium homodimer-1. Percentages of morphological normal and viable follicles were maintained similar to control (time 0 h) after incubation in 0.9% NaCl at 4 or 20 degrees C for up to 6h and at 38 degrees C for 2 h. Using MEM, such preservation was possible for 12h at 4 or 20 degrees C, and for 6h at 38 degrees C. These results indicate that preservation of canine preantral follicles might be better accomplished through hypothermic (4 or 20 degrees C) storage in MEM, which ensures maintenance of morphology and viability for up to 12h.
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Affiliation(s)
- Cláudio Afonso Pinho Lopes
- Faculty of Veterinary, PPGCV, LAMOFOPA, State University of Ceará, Av. Paranjana 1700, Campus do Itaperi, CEP 60.740-903, Fortaleza, CE, Brazil.
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16
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Saikhun J, Sriussadaporn S, Thongtip N, Pinyopummin A, Kitiyanant Y. Nuclear maturation and development of IVM/IVF canine embryos in synthetic oviductal fluid or in co-culture with buffalo rat liver cells. Theriogenology 2008; 69:1104-10. [PMID: 18367242 DOI: 10.1016/j.theriogenology.2008.01.024] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2007] [Revised: 01/03/2008] [Accepted: 01/29/2008] [Indexed: 11/24/2022]
Abstract
In vitro embryo production in the domestic bitch can provide valuable insights for conservation of endangered canids. In the present study, canine oocytes underwent in vitro maturation (IVM) in simple or complex media, with production of in vitro matured and fertilized (IVM/IVF) canine embryos. Cumulus-oocyte complexes (COCs) were harvested from ovaries by slicing and subjected to IVM in four media (SOF, TCM 199, Ham-F10, and DMEM/F12). After culture for 48h, oocytes were stained and examined for nuclear maturation. There were no significant differences in the mean (+/-S.D.) percentage of nuclear maturation (metaphase II) of oocytes cultured in SOF (18.6+/-7.6%), TCM 199 (18.3+/-4.5%), Ham-F10 (13.9+/-8.2%), or DMEM/F12 (11.9+/-4.2%). For assessment of embryo development, oocytes were matured for 48h in synthetic oviductal fluid (SOF), fertilized with frozen-thawed sperm, and presumptive zygotes were cultured for 7 d, either in SOF or as co-cultures with BRL cells in TCM 199. Percentages of IVM/IVF oocytes that developed to the 2-cell, 3-4-cell, and 5-7-cell stages were higher (P<0.05) following culture in SOF versus BRL cell co-cultures (33.6+/-1.2% vs 13.7+/-1.2%, 24.7+/-0.5% vs 8.7+/-1.1%, and 15.1+/-2.2% vs 4.3+/-1.3%, respectively). However, none of the embryos developed beyond the 8-16-cell stage. In conclusion, simple or complex media successfully induced resumption of meiosis and nuclear maturation of canine oocytes. Furthermore, SOF supported in vitro development of IVM/IVF canine embryos to the 8-16-cell stage.
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Affiliation(s)
- J Saikhun
- Institute of Science and Technology for Research and Development, Mahidol University, Puthamonthon sai 4, Salaya, Nakhonpathom 73170, Thailand.
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Chaves RN, Martins FS, Saraiva MVA, Celestino JJH, Lopes CAP, Correia JC, Verde IBL, Matos MHT, Báo SN, Name KPO, Campello CC, Silva JRV, Figueiredo JR. Chilling ovarian fragments during transportation improves viability and growth of goat preantral follicles cultured in vitro. Reprod Fertil Dev 2008; 20:640-7. [DOI: 10.1071/rd07195] [Citation(s) in RCA: 109] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2007] [Accepted: 03/24/2008] [Indexed: 11/23/2022] Open
Abstract
The aim of the present study was to evaluate the effects of storage of goat ovarian fragments at different temperatures and for different incubation times on the viability and growth of cultured preantral follicles in vitro. Caprine ovaries were collected and divided into 19 fragments, with one fragment being fixed immediately (fresh control). The remaining fragments were placed in minimal essential medium (MEM) and maintained at 4, 20 or 35°C for 2 or 4 h. After each incubation period, some of the fragments were fixed (non-cultured), whereas others were cultured in vitro for 1 or 7 days. Fragments were processed to enable routine histological and transmission electron microscopic examination. After 7 days of culture, only ovarian fragments stored at 4°C for 4 h maintained a percentage of morphologically normal follicles similar to that in the fresh control. For all other treatments groups, there was a significant increase in follicular activation observed. In addition, there was an increase in oocyte and follicular diameter after culture of ovarian cortex that had been chilled previously at 4°C for 2 or 4 h. In conclusion, the present study demonstrated that chilling ovarian fragments at 4°C during transportation is best for maintaining follicle viability and to increase follicular growth during in vitro culture.
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Hanna C, Long C, Hinrichs K, Westhusin M, Kraemer D. Assessment of canine oocyte viability after transportation and storage under different conditions. Anim Reprod Sci 2007; 105:451-6. [PMID: 18281167 DOI: 10.1016/j.anireprosci.2007.12.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2007] [Accepted: 12/19/2007] [Indexed: 11/29/2022]
Abstract
To improve assisted reproductive technologies in the domestic dog, different transport treatments were evaluated for their ability to maintain viability of canine oocytes, as assessed by esterase activity 8h after storage or after 48 h of in vitro maturation (IVM) culture. In Experiment 1, ovaries were transported within reproductive tracts or were excised and stored at either 20 or 37 degrees C in phosphate buffered saline. Oocytes collected from reproductive tracts transported at 37 degrees C had the greatest viability after storage (P<0.05). However, after IVM there were no significant differences among any of the four storage conditions in oocyte viability or meiotic resumption (P=0.05). In Experiment 2, isolated oocytes were transported in either TCM-199 with Hank's salts and Hepes buffer or in TL-Hepes at either 20 or 37 degrees C, or in maturation medium equilibrated with 5% CO(2) at 37 degrees C. In Experiment 2, oocytes transported in Hepes buffered media at 37 degrees C had greater viability rates after storage than did those transported in these same media at 20 degrees C or in sodium bicarbonate buffered medium at 37 degrees C (P<0.001). After IVM, oocytes transported in the 37 degrees C treatment groups had greater viability rates than did those transported at 20 degrees C (P<0.01). Overall, isolated oocytes transported at 37 degrees C had greater rates of meiotic resumption than did those transported at 20 degrees C (P<0.05). Taken together, these data indicate that canine oocytes exhibited sensitivity to lesser temperatures and maintained greater rates of viability during transport at 37 degrees C. Isolated oocytes maintained greater viability than oocytes transported in situ. Hepes buffered media increased viability rates for isolated oocytes transported at 37 degrees C compared to a similar medium buffered with sodium bicarbonate.
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Affiliation(s)
- Carol Hanna
- College of Veterinary Medicine, Department of Physiology and Pharmacology, Texas A&M University, College Station, TX, 77843-4466, USA
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