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Sharma K, Ammar OF, Fraire-Zamora JJ, Uraji J, Thomson A, Aydin B, Ezzati M, Alteri A, Liperis G. When disaster strikes: risk management and implementing emergency vitrification protocols in IVF laboratory crises. Hum Reprod 2024:deae080. [PMID: 38649142 DOI: 10.1093/humrep/deae080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Indexed: 04/25/2024] Open
Affiliation(s)
- Kashish Sharma
- HealthPlus Fertility Center, HealthPlus Network of Specialty Centers, Abu Dhabi, United Arab Emirates
| | - Omar F Ammar
- IVF Department, Ar-Razzi Hospital, Ramadi, Iraq
- Department of Obstetrics and Gynaecology, College of Medicine, University of Anbar, Ramadi, Iraq
| | | | - Julia Uraji
- IVF Laboratory, TFP Düsseldorf GmbH, Düsseldorf, Germany
| | | | | | - Max Ezzati
- Department of Reproductive Endocrinology and Infertility, Palo Alto Medical Foundation, Palo Alto, CA, USA
| | - Alessandra Alteri
- Obstetrics and Gynaecology Department, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - George Liperis
- Westmead Fertility Centre, Institute of Reproductive Medicine, University of Sydney, Westmead, NSW, Australia
- Embryorigin Fertility Centre, Larnaca, Cyprus
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Momeni A, Haghpanah T, Nematollahi-Mahani SN, Ashourzadeh S, Eftekhar-Vaghefi SH. Comparing the effects of vitrification, before and after mouse oocyte in vitro maturation on developmental competence, changes in epigenetic regulators and stress oxidative response. Biochem Biophys Res Commun 2023; 679:179-190. [PMID: 37703761 DOI: 10.1016/j.bbrc.2023.09.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Revised: 08/13/2023] [Accepted: 09/02/2023] [Indexed: 09/15/2023]
Abstract
Since the developmental stage of oocyte is a challenging issue in the success of vitrification, this study investigated the effects of vitrification, before and after in vitro maturation, on the survival and maturation rates, developmental competence and the expression levels of genes involved in apoptosis, oxidative stress and epigenetic modifications. Mouse germinal vesicle (GV) oocytes were divided into four groups: fresh in vitro matured oocytes without vitrification (fIVM), in vitro matured oocytes after vitrification (vIVM), in vitro matured oocytes before vitrification (IVMv). In addition, in vivo matured oocytes (MII) were used as control. After oocytes collection, maturation and survival rates as well as the intracellular reactive oxygen species (ROS) level were evaluated. Also, the expression level of various genes was analyzed by qRT-PCR. In addition, following artificial activation (parthenogenesis), the developmental competence of oocytes to the blastocyst stage was evaluated. A significant decrease in maturation rate and survival of vIVM oocytes was observed compared to fIVM and IVMv oocytes. Intracellular ROS levels were significantly increased in both vitrified groups compared to the fIVM group, and no significant difference between vitrified groups. Pro-apoptotic genes; BAX and Bcl2 as well as genes related to oxidative stress response Hsp1a, Hsp1b and SOD1were significantly increased in the vIVM group compared to the IVMv group. Interestingly, epigenetic regulators genes DNMT1, DNMT3a and DNMT3b were highly expressed in IVMv oocytes along with a decrease in the artificial activation rate compared to the vIVM oocytes. Our results indicated that despite observing more negative effects of vitrification before IVM on the survival rate and maturation as well as apoptosis status, less epigenetic changes in vIVM oocytes can make this process a better option in the treatment of infertility than IVM of oocytes followed by vitrification, a hypothesis that needs to be investigation in human oocytes.
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Affiliation(s)
- Asma Momeni
- Anatomical Sciences Department, School of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Tahereh Haghpanah
- Anatomical Sciences Department, School of Medicine, Kerman University of Medical Sciences, Kerman, Iran.
| | | | - Sareh Ashourzadeh
- Afzalipour Clinical Center for Infertility, Kerman University of Medical Sciences, Afzalipour Hospital, Kerman, Iran
| | - Seyed Hassan Eftekhar-Vaghefi
- Anatomical Sciences Department, School of Medicine, Kerman University of Medical Sciences, Kerman, Iran; Department of Anatomy, Kerman Branch, Islamic Azad University, Kerman, Iran.
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Akbari H, Foruozandeh H, Mohammadi M. Impact of Ovarian Factor Mediums on the Apoptotic Gene Expression and Embryo Quality Derived From Vitrified Immature Human Oocytes. J Obstet Gynaecol India 2023; 73:309-315. [PMID: 37701087 PMCID: PMC10492718 DOI: 10.1007/s13224-022-01726-8] [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: 01/08/2022] [Accepted: 10/30/2022] [Indexed: 01/02/2023] Open
Abstract
Background Condition mediums have a potential role in oocyte development. In this study, we evaluated the effects of different mediums on the developmental potential of vitrified immature human oocyte after IVM and parthenogenesis by ionomycin. Methods Immature oocytes were collected from 184 women after vitrification/thawing and maturation, in three types of IVM mediums separately. Finally, 151 IVM MΙΙ oocytes were obtained and randomly divided into six groups and underwent the following intervention. Fresh and vitrified-thawing MΙΙ oocytes were activated after IVM in three conditioned mediums by ionomycin. Mediums included 1) Minimum Essential Medium Alpha (α-MEM) (as control medium), 2) α-MEM supplemented with supernatants of Mesenchyme bone marrow (B.M), 3) α-MEM with ovarian growth factors (O.F). Then, scoring of parthenote embryos was undertaken in accordance with pertinent morphological properties. Moreover, the expression of Bax and Bcl2 were determined in the parthenote embryos. Result Percentage of the degenerated oocyte, 2-4 cells, 4-8 cells, and 16 cells, was different in the experimental groups. Also, cytoplasmic maturation and blastocyst formation rates were significantly different (p < 0.05) between the control and the other mediums. The highest mRNA expression levels of Bcl2 and Bax genes in parthenotes were observed in the fIVM O.F and vIVM α-MEM mediums, respectively. vIVM, α-MEM and fIVM O.F showed the lowest expression of Bcl2 and Bax genes, respectively. Conclusion Our findings indicate that the O.F. medium had more potent effects on oocyte growth and cytoplasmic maturation up to the blastocyst stage with the highest expression level of the BCL2 gene and the lowest relative amount of the BAX gene in this medium. The results of the present study have been verified only for parthenogenetically activated embryos, and any positive effect of the environment on the egg/embryo fertilized with sperm requires more extensive studies.
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Affiliation(s)
- Hakimeh Akbari
- Cellular and Molecular Research Center, Gerash University of Medical Sciences, Gerash, Iran
| | - Hossein Foruozandeh
- Cellular and Molecular Research Center, Gerash University of Medical Sciences, Gerash, Iran
| | - Masoud Mohammadi
- Cellular and Molecular Research Center, Gerash University of Medical Sciences, Gerash, Iran
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Zheng Q, Mo M, Zhang H, Xu S, Xu F, Wang S, Zeng Y. Prolong cryopreservation duration negatively affects pregnancy outcomes of vitrified-warmed blastocyst transfers using an open-device system: A retrospective cohort study. Eur J Obstet Gynecol Reprod Biol 2023; 281:68-75. [PMID: 36566684 DOI: 10.1016/j.ejogrb.2022.12.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 11/20/2022] [Accepted: 12/05/2022] [Indexed: 12/12/2022]
Abstract
OBJECTIVE To investigate the impact of cryopreservation (CP) duration on pregnancy outcomes of vitrified-warmed blastocysts transfers using an open-device liquid-nitrogen (LN2) system. METHODS This retrospective cohort study was conducted on 6327 first vitrified-warmed single blastocyst transfer cycles with autologous oocytes from January 2015 to December 2020. The CP duration was initially divided into six groups: Group I: 0-3 months (n = 4309); Group II: 4-6 months (n = 1061); Group III: 7-12 months (n = 304); Group IV: 13-24 months (n = 113); Group V: 25-72 months (n = 466); Group VI: 73-120 months (n = 74). Multivariate logistic regression was performed to evaluate the independent effect of CP duration on pregnancy outcomes. To further examine the time limit of vitrification, propensity score matching (PSM) was applied to compare pregnancy outcome of patients with storage duration of 25-120 months to those of 0-24 months. After that, pregnancy outcomes were compared among the subgroups of Group I': 0-24 months, Group II': 25-48 months, Group III': 49-72 months, Group IV': 73-120 months. Stratification analysis based on embryo quality was also performed. Primary outcomes were clinical pregnancy rate and live birth rate. Secondary outcomes were implantation, biochemical pregnancy rate, ongoing pregnancy rate and early miscarriage rate. RESULTS Logistic regression demonstrated that the odds of pregnancy outcomes were similar across Group I to IV. However, the implantation rate, chances of biochemical pregnancy, clinical pregnancy, ongoing pregnancy, and live birth significantly decreased as the storage duration increased up to 25 months, while miscarriage rate did not significantly differ between groups. Subgroup analysis confirmed a dramatical decrease of clinical pregnancy and live birth rate when cryopreserved for more than 24 months. After that, the slope was relatively steady between 25 and 72 months, then steeply decreased again as CP reached 73-120 months. In addition, there was a more remarkable decline of pregnancy outcomes in the average quality embryo transfers than in the high quality embryo transfers as cryopreservation storage increased. CONCLUSION Prolonged cryopreservation of vitrified blastocysts in an open-device LN2 system up to 24 months might negatively affect pregnancy outcomes. This negative impact progresses as storage duration increases, especially when exceeds 72 months. Average quality embryo appears to be less sustainable with long-term cryo-storage.
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Affiliation(s)
- Qizhen Zheng
- Shenzhen Key Laboratory of Reproductive Immunology for Peri-Implantation, Shenzhen Zhongshan Institute for Reproduction and Genetics, Fertility Center, Shenzhen Zhongshan Urology Hospital, Shenzhen 518045, Guangdong, People's Republic of China
| | - Meilan Mo
- Shenzhen Key Laboratory of Reproductive Immunology for Peri-Implantation, Shenzhen Zhongshan Institute for Reproduction and Genetics, Fertility Center, Shenzhen Zhongshan Urology Hospital, Shenzhen 518045, Guangdong, People's Republic of China
| | - Hongzhan Zhang
- Shenzhen Key Laboratory of Reproductive Immunology for Peri-Implantation, Shenzhen Zhongshan Institute for Reproduction and Genetics, Fertility Center, Shenzhen Zhongshan Urology Hospital, Shenzhen 518045, Guangdong, People's Republic of China
| | - Shiru Xu
- Shenzhen Key Laboratory of Reproductive Immunology for Peri-Implantation, Shenzhen Zhongshan Institute for Reproduction and Genetics, Fertility Center, Shenzhen Zhongshan Urology Hospital, Shenzhen 518045, Guangdong, People's Republic of China
| | - Fen Xu
- Shenzhen Key Laboratory of Reproductive Immunology for Peri-Implantation, Shenzhen Zhongshan Institute for Reproduction and Genetics, Fertility Center, Shenzhen Zhongshan Urology Hospital, Shenzhen 518045, Guangdong, People's Republic of China
| | - Sisi Wang
- Shenzhen Key Laboratory of Reproductive Immunology for Peri-Implantation, Shenzhen Zhongshan Institute for Reproduction and Genetics, Fertility Center, Shenzhen Zhongshan Urology Hospital, Shenzhen 518045, Guangdong, People's Republic of China
| | - Yong Zeng
- Shenzhen Key Laboratory of Reproductive Immunology for Peri-Implantation, Shenzhen Zhongshan Institute for Reproduction and Genetics, Fertility Center, Shenzhen Zhongshan Urology Hospital, Shenzhen 518045, Guangdong, People's Republic of China.
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Makieva S, Stähli C, Xie M, Gil AV, Sachs MK, Leeners B. The impact of zygote vitrification timing on pregnancy rate in frozen-thawed IVF/ICSI cycles. Front Cell Dev Biol 2023; 11:1095069. [PMID: 36711030 PMCID: PMC9880319 DOI: 10.3389/fcell.2023.1095069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 01/03/2023] [Indexed: 01/14/2023] Open
Abstract
Introduction: Cryopreservation of bipronuclear (2PN) stage zygotes is an integral part of IVF laboratory practice in countries with strict embryo culture legislation. Vitrification of zygotes is compatible with several strategies in infertility treatments holding a freeze-all indication and allows for effective workload management in settings with limited resources. Although it yields high survival rates and clinical outcomes, the ideal timing to commence vitrification of zygotes is elusive while it is empirically practiced in the window between 17 and 21 h post-insemination (hpi). We aimed to deduce the association between pregnancy rate and the time interval from insemination (IVF and ICSI) to vitrification to contribute to the standardization ofzygote cryopreservation. Methods: A retrospective analysis of data on vitrification timings and pregnancy outcomes collected between 2011 and 2019 was performed. All included women received an embryo transfer after warming of vitrified zygotes at the 2PN stage. Results: A total of 468 embryo transfers were included of which 182 (38.9%) resulted in pregnancy and 286 (61.1%) not. Vitrification was on average performed 18.74 ±0.63 hpi in the pregnant group and 18.62 ± 0.64 hpi in the non-pregnant group (OR 1.36, 95% CI 1.01; 1.83, p = 0.045). A multivariate analysis controlling for uterine pathologies, maternal age, AMH, the number of MII oocytes, previous history of pregnancy success, endometriosis, AFC, nicotine intake and male factor infertility showed no predictive value of vitrification timing on pregnancy rate. Three time intervals between insemination and vitrification were defined: 17:00 to 18:00 hpi (Group A), 18:01 to 19:00 hpi (Group B) and 19:01 to 21:00 hpi (Group C). Pregnancy occurred in 40/130 women (30.80%) in Group A, in 115/281 women (40.90%) in Group B and in 27/57 women (47.40%) in Group C. Univariate but not multivariate analysis showed a significantly higher pregnancy rate after the latest time interval between insemination and 2PN vitrification when compared to the earliest (Group C vs. A, OR 2.03, 95% CI 1.07; 3.84, p = 0.031). Discussion: These findings encourage further investigation on the impact of vitrification timing on clinical outcomes and hold the potential to standardize cryopreservation of zygotes from IVF/ICSI cycles to eventually improve the quality of long-term ART outcomes.
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Affiliation(s)
- Sofia Makieva
- Department of Reproductive Endocrinology, University Hospital Zurich, Zurich, Switzerland,*Correspondence: Sofia Makieva,
| | - Celine Stähli
- Department of Reproductive Endocrinology, University Hospital Zurich, Zurich, Switzerland,Faculty of Medicine, University of Zurich, Zurich, Switzerland
| | - Min Xie
- Department of Reproductive Endocrinology, University Hospital Zurich, Zurich, Switzerland
| | - Ana Velasco Gil
- Department of Reproductive Endocrinology, University Hospital Zurich, Zurich, Switzerland
| | - Maike Katja Sachs
- Department of Reproductive Endocrinology, University Hospital Zurich, Zurich, Switzerland
| | - Brigitte Leeners
- Department of Reproductive Endocrinology, University Hospital Zurich, Zurich, Switzerland
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Cooper LJ, Emery BR, Aston K, Fair D, Rosen MP, Johnstone E, Letourneau JM. Fertility preservation practices for female oncofertility differ significantly across the USA: results of a survey of SREI members. J Assist Reprod Genet 2022; 39:1749-1757. [PMID: 35870098 PMCID: PMC9428095 DOI: 10.1007/s10815-022-02567-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 07/04/2022] [Indexed: 01/19/2023] Open
Abstract
PURPOSE The field of oncofertility has maintained an important focus on improving access, yet standardized practices are lacking. To assess how female cancer patients are provided oncofertility care, we sought to determine provider-level differences and whether there are physician or practice characteristics that predict these variations. METHODS A cross-sectional survey was sent to SREI members. The survey included fifteen questions about physician practice characteristics and oncofertility cryopreservation protocols. Topics included ovarian stimulation protocols, fertilization techniques, stage of embryo cryopreservation, routine use of pre-implantation genetic testing for aneuploidy (PGT-A), and ovarian tissue cryopreservation (OTC). Statistical analyses assessed whether practice setting, geographic region, time in practice, and mandatory state insurance coverage had effects on cryopreservation protocols. RESULTS A total of 141 (17%) from diverse REI practice backgrounds completed the survey. The median number of new female oncofertility consults per year was 30 (range 1 to 300). Providers in academic settings treated more patients (median 40 vs. 15, p < 0.001). Providers in academic settings more often use gonadotropin-releasing hormone agonists (85% vs. 52%, p < 0.001) and perform OTC (41% vs. 4%, p < 0.001). Providers in academic practices were less likely to perform intracytoplasmic sperm injection in every cycle (37% vs. 55%, p = 0.032) and less likely to usually advise PGT-A (21% vs. 36%, p = 0.001). Mandated state insurance coverage had no effect on oncofertility practices. CONCLUSION Oncofertility practices vary among providers. Factors such as practice setting and region may affect the services provided. We do not yet know the best practices in oncofertility patients, and future research is needed.
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Affiliation(s)
- Leah J. Cooper
- grid.223827.e0000 0001 2193 0096Department of Obstetrics and Gynecology, University of Utah Health, 675 Arapeen Drive, Suite 205, Salt Lake City, UT 84105 USA
| | - Benjamin R. Emery
- grid.223827.e0000 0001 2193 0096Department of Surgery, University of Utah School of Medicine, Salt Lake City, USA
| | - Kenneth Aston
- grid.223827.e0000 0001 2193 0096Department of Surgery, University of Utah School of Medicine, Salt Lake City, USA
| | - Douglas Fair
- grid.223827.e0000 0001 2193 0096Department of Obstetrics and Gynecology, University of Utah Health, 675 Arapeen Drive, Suite 205, Salt Lake City, UT 84105 USA
| | - Mitchell P. Rosen
- grid.266102.10000 0001 2297 6811Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Francisco School of Medicine, San Francisco, USA
| | - Erica Johnstone
- grid.223827.e0000 0001 2193 0096Department of Obstetrics and Gynecology, University of Utah Health, 675 Arapeen Drive, Suite 205, Salt Lake City, UT 84105 USA
| | - Joseph M. Letourneau
- grid.223827.e0000 0001 2193 0096Department of Obstetrics and Gynecology, University of Utah Health, 675 Arapeen Drive, Suite 205, Salt Lake City, UT 84105 USA
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Doroudi R, Changizi Z, Nematollahi-Mahani SN. Effects of melatonin and human follicular fluid supplementation of in vitro maturation medium on mouse vitrified germinal vesicle oocytes: A laboratory study. Int J Reprod Biomed 2021; 19:889-898. [PMID: 34805729 PMCID: PMC8595905 DOI: 10.18502/ijrm.v19i10.9821] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 12/21/2020] [Accepted: 01/25/2021] [Indexed: 11/24/2022] Open
Abstract
Background Vitrification as the most efficient method of cryopreservation, enables successful storage of oocytes for couples who undergo specific procedures including surgery and chemotherapy. However, the efficacy of in vitro maturation (IVM) methods with vitrified germinal vesicle (GV) oocytes could be improved. Objective As melatonin and follicular fluid (FF) might enhance IVM conditions, we used these supplements to assess the maturation rate of vitrified GV oocytes and their artificial fertilization rate. Materials and Methods Four hundred mouse GV oocytes were harvested, vitrified, and assigned into control (C-Vit-GV) and treatment groups of melatonin (M-Vit-GV), human follicular fluid (HFF-Vit-GV), and a combination (M + HFF-Vit-GV). A non-vitrified group of GV oocytes (non-Vit-GV) and a group of in vivo matured metaphase II (Vivo-MII) oocytes served as control groups to evaluate the vitrification and IVM conditions, respectively. Maturation of GV oocytes to MII and further development to two-cell-stage embryos were determined in the different groups. Results Development to two-cell embryos was comparable between the Vivo-MII and non-Vit-GV groups. IVM and in vitro fertilization (IVF) results in the non-Vit-GV group were also comparable with the C-Vit-GV oocytes. In addition, the IVM and IVF outcomes were similar across the different treatment groups including the M-Vit-GV, HFF-Vit-GV, M + HFF-Vit-GV, and C-Vit-GV oocytes. Conclusion Employing an appropriate technique of vitrification followed by suitable IVM conditions can lead to reasonable IVF outcomes which may not benefit from extra supplementations. However, whether utilizing other supplementation formulas could improve the outcome requires further investigation.
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Affiliation(s)
- Razieh Doroudi
- Department of Anatomy, Afzalipour School of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Zohre Changizi
- Leishmaniasis Research Center, Kerman University of Medical Sciences, Kerman, Iran
| | - Seyed Noureddin Nematollahi-Mahani
- Department of Anatomy, Afzalipour School of Medicine, Kerman University of Medical Sciences, Kerman, Iran.,Kerman Physiology Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran
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Regenerative Medicine Approaches in Bioengineering Female Reproductive Tissues. Reprod Sci 2021; 28:1573-1595. [PMID: 33877644 DOI: 10.1007/s43032-021-00548-9] [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: 12/30/2020] [Accepted: 03/15/2021] [Indexed: 10/21/2022]
Abstract
Diseases, disorders, and dysfunctions of the female reproductive tract tissues can result in either infertility and/or hormonal imbalance. Current treatment options are limited and often do not result in tissue function restoration, requiring alternative therapeutic approaches. Regenerative medicine offers potential new therapies through the bioengineering of female reproductive tissues. This review focuses on some of the current technologies that could address the restoration of functional female reproductive tissues, including the use of stem cells, biomaterial scaffolds, bio-printing, and bio-fabrication of tissues or organoids. The use of these approaches could also be used to address issues in infertility. Strategies such as cell-based hormone replacement therapy could provide a more natural means of restoring normal ovarian physiology. Engineering of reproductive tissues and organs could serve as a powerful tool for correcting developmental anomalies. Organ-on-a-chip technologies could be used to perform drug screening for personalized medicine approaches and scientific investigations of the complex physiological interactions between the female reproductive tissues and other organ systems. While some of these technologies have already been developed, others have not been translated for clinical application. The continuous evolution of biomaterials and techniques, advances in bioprinting, along with emerging ideas for new approaches, shows a promising future for treating female reproductive tract-related disorders and dysfunctions.
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Ceratonia siliqua (Carob) extract improved in vitro development of vitrified-warmed mouse germinal vesicle oocytes: assessment of possible mechanism. Cell Tissue Bank 2020; 22:137-144. [PMID: 33052521 DOI: 10.1007/s10561-020-09873-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Accepted: 10/04/2020] [Indexed: 10/23/2022]
Abstract
Oocyte banking is a vital step for safekeeping and spreading genetic resources of animals. It is also used for fertility preservation of human. Oocyte vitrification is closely related to the lower developmental competence which includes the cryo-injury arisen during vitrification. The aim of the present study was to evaluate the maturation, embryonic development and production of reactive oxygen species (ROS) of mice oocytes following the supplementation vitrification media with different concentrations of Ceratonia siliqua (carob) extracts. In this experimental study, germinal vesicle oocytes collected from 8 to 10 week-old female NMRI mice (30-40 gr) were randomly divided into six groups of vitrification media supplemented with 0 (control), 5, 10, 20, 30 and 50 µg/ml C. siliqua. After thawing, oocytes were put in an in vitro maturation medium (IVM) (α-MEM: Alpha Minimum Essential Medium). 3-4 and 24 h (hr) later, the oocyte nuclear maturity was checked. Standard in vitro fertilization was performed on the matured oocytes (MII), and embryonic development was followed. Extra- and intra-cellular ROS was measured in IVM medium after 24 h of oocyte incubation. The addition of 20 and 30 μg/ml C. siliqua extract to vitrification media improved normal morphology of warmed germinal vesicle (GV) oocytes, rate of germinal vesicle break down (GVBD), and metaphase 2 (MII) oocyte formation significantly (p < 0.05). Fertilization rate, (embryonic development to 2 cells stage, 4-8 cells stage, and > 8 cells stage increased in the 30 μg/ml C. siliqua group significantly (p < 0.05). Furthermore, supplementation of 30 μg/ml C. siliqua in vitrification media significantly decreased extra- and intra-cellular of ROS as well as embryonic fragmentation (p < 0.05). In conclusion, supplementation of GV oocyte vitrification media with carob extract improved maturation, fertilization, and embryonic development rate and decreased extra- and intra-cellular ROS levels.
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The effect of conditioned media on mouse oocytes ultrastructure following in vitro maturation. GENE REPORTS 2020. [DOI: 10.1016/j.genrep.2020.100732] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Investigation of transfer results of human embryos that were vitrified and thawed at the cleavage, morula and blastocyst stages. ZYGOTE 2020; 28:191-195. [DOI: 10.1017/s0967199419000777] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
SummaryThe objective of this study was to compare the rates of clinical pregnancy after the transfer of vitrified and thawed human embryos on days 3, 4 and 5 of embryonic development. In this retrospective study, the results of 148 embryo transfer cycles, using embryos frozen and thawed over the 3-year period between January 2016 and December 2018 at the Gülhane Training and Research Hospital Department of Gynecology and Obsterics Reproductive Medical Center of the University of Health Sciences, Ankara, Turkey were examined. Following embryo transfer – including 29 dissolved embryos frozen on day 3, 80 frozen on day 4, and 39 frozen on day 5 – results were examined in terms of clinical pregnancy rates. In this study, across all three groups, no significant differences were observed in terms of patient age, the number of oocytes collected, infertility reasons, the number of embryos dissolved, transfer day, or the number of embryos transferred. According to the transfer day, the rates of clinical pregnancy and ongoing pregnancy were significantly higher for embryos frozen on day 4 and transferred on day 5. Significantly higher rates of pregnancy and live birth were determined during in vitro fertilization (IVF) treatment with the freezing of human embryos on day 4 and the transfer of those embryos on day 5.
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Chatroudi MH, Khalili MA, Ashourzadeh S, Anbari F, Shahedi A, Safari S. Growth differentiation factor 9 and cumulus cell supplementation in in vitro maturation culture media enhances the viability of human blastocysts. Clin Exp Reprod Med 2019; 46:166-172. [PMID: 31813208 PMCID: PMC6919206 DOI: 10.5653/cerm.2019.00402] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Accepted: 08/26/2019] [Indexed: 12/03/2022] Open
Abstract
Objective In vitro maturation (IVM) of immature oocytes can be useful for some infertile patients. In IVM programs, the rates of embryo formation and pregnancy are low. Therefore, it is essential to recognize the main factors involved in regulating oocyte maturation in vitro. The purpose of this study was to investigate the effects of growth differentiation factor 9 (GDF9) and cumulus cell (CC) supplementation in IVM medium on the rates of embryo formation and viability of human blastocysts. Methods A total of 80 germinal vesicle oocytes from stimulated cycles underwent an IVM program. The oocytes were divided into four groups, where group I consisted of IVM media only and served as the control, group II consisted of IVM+CCs, group III consisted of IVM+GDF9 (200 ng/mL), and group IV consisted of IVM+CCs+GDF9 (200 ng/mL). Intracytoplasmic sperm injection was performed on the IVM oocytes, and the cleavage embryos that were generated were vitrified. Following thawing, the embryos were cultured for 3 additional days, and the viability rates of the developed blastocysts were determined. Results The maturation rate of the oocytes did not differ significantly across the four groups. The fertilization rate in group II was significantly higher than that in the control group (76.5% vs. 46.2%). Embryo formation was significantly more frequent in all experimental groups than in the control group, while blastocyst formation did not show significant differences in the three experimental groups compared to the control. The mean viability rates in groups II, III, and IV were 58.16%, 55.91%, and 55.95%, respectively, versus 37.78% in the control group (p<0.05). Conclusion Supplementation of IVM culture media with GDF9 and CCs enhanced the fertilization, embryo formation, and viability rates of blastocysts generated from vitrified cleavage embryos.
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Affiliation(s)
- Mahla Honari Chatroudi
- Department of Anatomy and Cell Biology, Shahid Sadoughi University of Medical Sciences and Health Services, Yazd, Iran
| | - Mohammad Ali Khalili
- Department of Anatomy and Cell Biology, Shahid Sadoughi University of Medical Sciences and Health Services, Yazd, Iran.,Department of Reproductive Biology, Yazd Reproductive Science Institute, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Sareh Ashourzadeh
- Kerman Infertility Center, Afzalipour Hospital, Kerman University of Medical Sciences, Kerman, Iran
| | - Fatemeh Anbari
- Department of Reproductive Biology, Yazd Reproductive Science Institute, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Abbas Shahedi
- Department of Anatomy and Cell Biology, Shahid Sadoughi University of Medical Sciences and Health Services, Yazd, Iran
| | - Somayyeh Safari
- Hospital Research Development Committee, Nekoei-Hedayati-Forghani Hospital, Qom University of Medical Science, Qom, Iran
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Abstract
SummaryCumulus cells (CCs) play an important role in the regulation of female gamete development, meiotic maturation, oocyte-sperm interaction, capacitation and acrosome reaction. However, their role in maintaining oocyte competence after vitrification is unclear as controversial data on their protecting action against oocyte cryoinjuries are available. Here we described the effects of vitrification on the ultrastructure of human CCs collected from women undergoing assisted reproductive technologies (ARTs). In total, 50 patches of CCs, sampled from high-quality human cumulus-oocyte complexes, were randomly allocated into two groups after patient informed consent: 1, fresh CCs (controls, n = 25); 2, vitrified CCs (n = 25). Samples were then prepared and observed by transmission electron microscopy. In fresh CCs, in which small cell clusters were visible, cell membranes were joined by focal gap junctions. Microvilli were rare and short. Nuclei, mitochondria, smooth endoplasmic reticulum (SER), Golgi apparatus and lipid droplets appeared well preserved; vacuoles were scarce. After vitrification, we observed two populations of CCs: light CCs, with a smooth appearance and few short microvilli; and dark CCs, with numerous and long microvilli. In both, most of the organelles appeared similar to those of fresh CCs. Lipid droplets were denser and more numerous, with respect to fresh CCs. They were mainly located in the peri-nuclear and sub-plasmalemmal regions. Numerous packed electron-negative vacuoles were visible. The vitrification procedure did not cause alterations in the fine structure of major organelles, except for an increased amount of lipid droplets and vacuoles. This specific sensitivity of human CCs to vitrification should be considered during ARTs.
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Akbari H, Eftekhar Vaghefi SH, Shahedi A, Habibzadeh V, Mirshekari TR, Ganjizadegan A, Mollaei H, Ahmadi M, Nematollahi-Mahani SN. Mesenchymal Stem Cell-Conditioned Medium Modulates Apoptotic and Stress-Related Gene Expression, Ameliorates Maturation and Allows for the Development of Immature Human Oocytes after Artificial Activation. Genes (Basel) 2017; 8:genes8120371. [PMID: 29292728 PMCID: PMC5748689 DOI: 10.3390/genes8120371] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 10/30/2017] [Accepted: 11/21/2017] [Indexed: 01/09/2023] Open
Abstract
The aim of the present study was to determine whether mesenchymal stem cell-conditioned medium (MSC-CM) modulates apoptotic and stress-related gene expression, and ameliorates maturation and developmental potential of immature human oocytes after artificial activation. A total of 247 surplus immature germinal vesicle (GV) oocytes obtained from infertile women were allocated into two in vitro maturation (IVM) groups: 1: GV oocytes (n = 116) matured in vitro (fIVM), and 2: GV oocytes (n = 131) that were vitrified, then in vitro matured (vIVM). Also, two maturation media were used: Alpha-minimum essential medium (α-MEM) and human umbilical cord-derived MSCs (hUCM). After 36 h of incubation, the IVM oocytes were examined for nuclear maturation. In IVM-matured oocytes, cytoplasmic maturation was evaluated after artificial activation through Ionomycin. Moreover, the quantitative expressions of B-cell CLL/lymphoma 2 (BCL2), BCL2-associated X protein (BAX), superoxide dismutase (SOD), and Heat shock proteins (HSP70) in matured oocytes were assessed by quantitative Real-time polymerase chain reaction (qRT-PCR) and compared with fresh and vitrified in vivo matured oocytes, which were used as fIVM and vIVM controls, respectively. The highest maturation rate was found in hUCM in fIVM, and the lowest maturation rate was found using α-MEM in vIVM (85.18% and 71.42%, respectively). The cleavage rate in fIVM was higher than that in vIVM (83.4% vs. 72.0%). In addition, the cleavage rate in α-MEM was lower than that in the hUCM (66.0% vs. 89.4%). Furthermore, the difference between parthenote embryo arrested in 4-8 cells (p < 0.04) and the quality of embryo arrested in 8-cell (p < 0.007) were significant. The developmental stages of parthenote embryos in hUCM versus α-MEM were as follows: 2-4 cell (89.45% vs. 66.00%, respectively), 4-8 cell (44.31% vs. 29.11%, respectively), morula (12.27% vs. 2.63%, respectively), and blastocysts (2.5% vs. 0%, respectively). The messenger RNA (mRNA) expression levels of BCL2, BAX and SOD were significantly different (p < 0.05) between the matured IVM oocytes. Overall, hUCM showed potential efficacy in terms of ameliorating oocyte maturation and in promoting the development and mRNA expression of BAX, BCL2, and SOD.
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Affiliation(s)
- Hakimeh Akbari
- Department of Anatomy, Afzalipour Faculty of Medicine, Kerman University of Medical Sciences, 7616913555 Kerman, Iran.
- Cellular and Molecular Research Center, Gerash University of Medical Science, 7441758666 Gerash, Iran.
| | - Seyed Hassan Eftekhar Vaghefi
- Department of Anatomy, Afzalipour Faculty of Medicine, Kerman University of Medical Sciences, 7616913555 Kerman, Iran.
| | - Abbas Shahedi
- Department of Biology and Anatomical Sciences, Shahid Sadoughi University of Medical Sciences, 8916978477 Yazd, Iran.
| | - Victoria Habibzadeh
- Afzalipour Clinical Center for Infertility, Afzalipour Hospital, Kerman University of Medical Sciences, 7616913555 Kerman, Iran.
| | - Tooraj Reza Mirshekari
- Afzalipour Clinical Center for Infertility, Afzalipour Hospital, Kerman University of Medical Sciences, 7616913555 Kerman, Iran.
| | - Aboozar Ganjizadegan
- Afzalipour Clinical Center for Infertility, Afzalipour Hospital, Kerman University of Medical Sciences, 7616913555 Kerman, Iran.
| | - Hamidreza Mollaei
- Department of Medical Microbiology, Kerman University of Medical Sciences, 7616913555 Kerman, Iran.
| | - Meysam Ahmadi
- Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, 7616913555 Kerman, Iran.
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Juanpanich T, Suttirojpattana T, Takayama M, Liang Y, Dochi O, Parnpai R, Imai K. Survival and developmental competence of bovine embryos at different developmental stages and separated blastomeres after vitrification in different solutions. Anim Sci J 2017; 89:42-51. [PMID: 28856787 DOI: 10.1111/asj.12890] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Accepted: 07/10/2017] [Indexed: 11/28/2022]
Abstract
Generating techniques to enhance the success of blastomere separation is important for bovine economy, because it increases the number of transferable embryos. This study aimed to identify the optimum cryoprotectants for the vitrification of bovine embryos and the separation of blastomeres at different stages. In experiment 1, expanded blastocysts were vitrified in two different vitrification solutions, either (1) ethylene glycol (EG) + propylene glycol (PG) or (2) EG. The survival rate of blastocysts in the EG + PG was higher than that of the EG. In experiment 2, intact two-cell and eight-cell stage embryos were vitrified in the same solutions used in experiment 1. The EG + PG produced more dead embryos than the EG (P < 0.05). In the EG, the rate of blastocyst formation was similar for the vitrified two- and eight-cell embryos and the non-vitrified ywo-cell embryos. In experiment 3, separated blastomeres of two- and eight-cell embryos were vitrified in EG. There was no difference in the rate of blastocyst formation and total number of cells between the two vitrified groups. In summary, at the blastocyst stage, EG + PG was superior, based on both survival rates and cell numbers; however, at the 2-8 cell stage, the use of EG alone was better than the other groups.
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Affiliation(s)
- Theesit Juanpanich
- Embryo Technology and Stem cell Research Center, School of Biotechnology, Suranaree University of Technology, Nakhon Ratchasima, Thailand.,Graduate School of Dairy Science, Rakuno Gakuen University, Ebetsu, Hokkaido, Japan
| | - Tayita Suttirojpattana
- Embryo Technology and Stem cell Research Center, School of Biotechnology, Suranaree University of Technology, Nakhon Ratchasima, Thailand
| | - Mari Takayama
- Graduate School of Dairy Science, Rakuno Gakuen University, Ebetsu, Hokkaido, Japan
| | - Yuanyuan Liang
- Embryo Technology and Stem cell Research Center, School of Biotechnology, Suranaree University of Technology, Nakhon Ratchasima, Thailand
| | - Osamu Dochi
- Graduate School of Dairy Science, Rakuno Gakuen University, Ebetsu, Hokkaido, Japan
| | - Rangsun Parnpai
- Embryo Technology and Stem cell Research Center, School of Biotechnology, Suranaree University of Technology, Nakhon Ratchasima, Thailand
| | - Kei Imai
- Graduate School of Dairy Science, Rakuno Gakuen University, Ebetsu, Hokkaido, Japan
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Vitrification of mouse MII oocytes: Developmental competency using paclitaxel. Taiwan J Obstet Gynecol 2017; 55:796-800. [PMID: 28040122 DOI: 10.1016/j.tjog.2016.05.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/06/2016] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVE Oocyte cryopreservation provides an important alternative for fertility preservation for women who will be treated with cytotoxic drugs. However, it can cause spindle disorganization of microtubules, putting the zygote at risk for aneuploidy. Paclitaxel is known to stabilize the microtubules that constitute the spindle. The aim of this study was to investigate the suitable concentration of paclitaxel for adding to the vitrification media to improve the developmental potential of post-thawed mature oocytes to blastocyst formation in mice. MATERIALS AND METHODS A total of 300 MII oocytes were retrieved from superovulated mice, and were divided into three groups of control, Experimental I, and Experimental II. Oocytes in Experimental I and Experimental II were cryopreserved in the presence of 0.5μM or 1μM of paclitaxel in vitrification media, respectively. After thawing, all oocytes were incubated in G-IVF medium for 1 hour. From each group,12 oocytes were selected for viability evaluation by Hoechst/propidium iodide nuclear staining. Standard in vitro fertilization was performed on the rest of the oocytes and embryo development was followed to the blastocyst stage. RESULTS Fertilization rate was not significantly different between the three groups. However, the cleavage rate (55%) in Experimental II group was significantly lower compared to Experimental I (88%) and control groups (83%). There was a detectable difference between the three groups at the blastocyst rate (Experimental I and control groups, p = 0.004; Experimental II vs. control and Experimental I, p < 0.001). The highest rates of parthenogenesis and arrest were in Experimental II (16% and 21%, respectively) compared with control (6% and 5%, respectively) and Experimental I (5% and 3%, respectively). There was also a significant decrease in viability rate of oocytes in Experimental II compared to the other groups. CONCLUSION A high concentration of paclitaxel, an anticancer drug, interrupted the mouse oocyte competency when supplemented to vitrification media. Consequently, the optimal concentration of this cytoskeleton stabilizer may improve the post-thawed developmental abilities of oocytes.
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Fesahat F, Dehghani Firouzabadi R, Faramarzi A, Khalili MA. The effects of different types of media on in vitro maturation outcomes of human germinal vesicle oocytes retrieved in intracytoplasmic sperm injection cycles. Clin Exp Reprod Med 2017; 44:79-84. [PMID: 28795046 PMCID: PMC5545223 DOI: 10.5653/cerm.2017.44.2.79] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Revised: 04/03/2017] [Accepted: 05/17/2017] [Indexed: 11/06/2022] Open
Abstract
OBJECTIVE Optimizing in vitro maturation (IVM) media to achieve better outcomes has been a matter of interest in recent years. The aim of this prospective clinical trial was to investigate the effects of different media on the IVM outcomes of immature oocytes at the germinal vesicle (GV) stage. METHODS A total of 400 immature oocytes at the GV stage with normal morphology were retrieved from 320 infertile women aged 31±4.63 years during stimulated intracytoplasmic sperm injection (ICSI) cycles. They were divided into groups of homemade IVM medium (I, n=100), cleavage medium (II, n=100), blastocyst medium (III, n=100), and Sage IVM medium (IV, n=100) and cultured for 24 to 48 hours at 37℃. ICSI was performed, and the rates of fertilization and embryo formation were compared across the four groups. RESULTS In the 400 retrieved GV oocytes, the total maturation rates showed significant differences in groups I to IV (55%, 53%, 78%, and 68%, respectively, p<0.001). However, there were no significant differences in the fertilization, embryo formation, or arrest rates of metaphase II oocytes across these groups. In all groups, GV maturation was mostly completed after 24 hours, with fewer oocytes requiring 48 hours to mature (p<0.01). Moreover, the rate of high-quality embryos was higher in group IV than in the other groups (p=0.01). CONCLUSION The quality of the IVM medium was found to affect clinical IVM outcomes. Additionally, blastocyst medium may be a good choice in IVM/ICSI cycles as an alternative IVM medium.
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Affiliation(s)
- Farzaneh Fesahat
- Department of Genetics, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
- Research and Clinical Center for Infertility, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | | | - Azita Faramarzi
- Research and Clinical Center for Infertility, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Mohammad Ali Khalili
- Research and Clinical Center for Infertility, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
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Beyer DA, Amari F. Maternal risk factors and neonatal outcomes after ART treatment – A German monocenter experience. MIDDLE EAST FERTILITY SOCIETY JOURNAL 2016. [DOI: 10.1016/j.mefs.2015.12.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Artificial shrinkage of blastocoel using a laser pulse prior to vitrification improves clinical outcome. J Assist Reprod Genet 2016; 33:467-71. [PMID: 26843389 DOI: 10.1007/s10815-016-0662-z] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Accepted: 01/14/2016] [Indexed: 10/22/2022] Open
Abstract
PURPOSE Blastocysts contain a large amount of fluid in the blastocoel, which may pose a risk for ice crystal formation during vitrification. This study aimed to evaluate the effectiveness of laser-induced artificial shrinkage of blastocoel before vitrification on clinical outcome. METHODS Patients were divided into two groups: a control group with untreated, expanded blastocysts (n = 115) and a study group with blastocoel artificially eliminated by a laser pulse prior to vitrification (n = 309). Blastocyst survival, clinical pregnancy, and implantation rates were compared. RESULT(S) The survival rate was significantly higher in the study group compared with the control group (97.3 and 74.9 %, respectively; p > 0.01). The clinical pregnancy and implantation rates of the study group were significantly higher (p < 0.01) than that of the control group (clinical pregnancy, 67.2 vs. 41.1 %; implantation, 39.1 vs. 24.5 %. CONCLUSION(S) This study demonstrated that the removal of blastocoel fluid before vitrification by laser pulse of in vitro-produced human blastocysts significantly improves blastocyst survival, clinical pregnancy, and implantation rates.
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Nishiyama Y, Iwanami A, Kohyama J, Itakura G, Kawabata S, Sugai K, Nishimura S, Kashiwagi R, Yasutake K, Isoda M, Matsumoto M, Nakamura M, Okano H. Safe and efficient method for cryopreservation of human induced pluripotent stem cell-derived neural stem and progenitor cells by a programmed freezer with a magnetic field. Neurosci Res 2016; 107:20-9. [PMID: 26804710 DOI: 10.1016/j.neures.2015.11.011] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Revised: 11/30/2015] [Accepted: 11/30/2015] [Indexed: 02/06/2023]
Abstract
Stem cells represent a potential cellular resource in the development of regenerative medicine approaches to the treatment of pathologies in which specific cells are degenerated or damaged by genetic abnormality, disease, or injury. Securing sufficient supplies of cells suited to the demands of cell transplantation, however, remains challenging, and the establishment of safe and efficient cell banking procedures is an important goal. Cryopreservation allows the storage of stem cells for prolonged time periods while maintaining them in adequate condition for use in clinical settings. Conventional cryopreservation systems include slow-freezing and vitrification both have advantages and disadvantages in terms of cell viability and/or scalability. In the present study, we developed an advanced slow-freezing technique using a programmed freezer with a magnetic field called Cells Alive System (CAS) and examined its effectiveness on human induced pluripotent stem cell-derived neural stem/progenitor cells (hiPSC-NS/PCs). This system significantly increased cell viability after thawing and had less impact on cellular proliferation and differentiation. We further found that frozen-thawed hiPSC-NS/PCs were comparable with non-frozen ones at the transcriptome level. Given these findings, we suggest that the CAS is useful for hiPSC-NS/PCs banking for clinical uses involving neural disorders and may open new avenues for future regenerative medicine.
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Affiliation(s)
- Yuichiro Nishiyama
- Department of Orthopedic Surgery, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan; Department of Physiology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Akio Iwanami
- Department of Orthopedic Surgery, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Jun Kohyama
- Department of Physiology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Go Itakura
- Department of Physiology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Soya Kawabata
- Department of Orthopedic Surgery, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Keiko Sugai
- Department of Orthopedic Surgery, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Soraya Nishimura
- Department of Orthopedic Surgery, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Rei Kashiwagi
- Department of Orthopedic Surgery, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Kaori Yasutake
- Department of Orthopedic Surgery, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Miho Isoda
- Department of Physiology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan; Regenerative and Cellular Medicine Office, Sumitomo Dainippon Pharma Co., Ltd., Chuo-ku, Kobe 650-0047, Japan
| | - Morio Matsumoto
- Department of Orthopedic Surgery, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan
| | - Masaya Nakamura
- Department of Orthopedic Surgery, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan.
| | - Hideyuki Okano
- Department of Physiology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan.
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[Vitrification: Principles and results]. ACTA ACUST UNITED AC 2015; 44:485-95. [PMID: 25869444 DOI: 10.1016/j.jgyn.2015.02.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Revised: 01/29/2015] [Accepted: 02/27/2015] [Indexed: 11/23/2022]
Abstract
Sperm and embryos cryopreservation is a commonly applied technique for several years. Recently authorized in France, vitrification tends to replace gradually the conventional technique of slow freezing, so upsetting the practices in the management of patients. It allows from now on the cryopreservation of oocytes and opens new perspectives in egg donation either still in fertility preservation. This review thus attempted to examine the contribution of vitrification in the freezing of oocytes and human embryos at various stages of development. If obviously vitrification appears as the current method of choice for the cryopreservation of oocytes as well as blastocysts, the results are less cut as regards embryos to early stages. No increase in adverse obstetric and perinatal outcomes in children conceived from vitrified oocytes or embryos is noted in the literature.
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23
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Youssry M, Orief Y, Palapelas V, Al-Hasani S. Embryo cryopreservation: is vitrification ready to replace slow freezing? ACTA ACUST UNITED AC 2014. [DOI: 10.1586/17474108.3.4.455] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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24
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Son WY, Tan SL. Comparison between slow freezing and vitrification for human embryos. Expert Rev Med Devices 2014; 6:1-7. [DOI: 10.1586/17434440.6.1.1] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Cryopreservation of human oocytes, zygotes, embryos and blastocysts: A comparison study between slow freezing and ultra rapid (vitrification) methods. MIDDLE EAST FERTILITY SOCIETY JOURNAL 2013. [DOI: 10.1016/j.mefs.2012.10.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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The effect of vitrification on maturation and viability capacities of immature human oocytes. Arch Gynecol Obstet 2013; 288:439-44. [PMID: 23467795 DOI: 10.1007/s00404-013-2777-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2012] [Accepted: 02/21/2013] [Indexed: 01/08/2023]
Abstract
BACKGROUND 15 % of oocytes collected from Assisted Reproductive Technology (ART) cycles are immature. These oocytes may be matured following in vitro maturation (IVM) program. It is possible to cryopreserve the immature oocytes for further use in ART after application of IVM. OBJECTIVE The aim was to determine the maturation rate and viability of human oocytes that were matured in vitro after vitrification program. MATERIALS AND METHODS 63 women (19-43 years old) who underwent controlled ovarian stimulation for ART were included in this study. 53 immature oocytes were used for fresh group (fIVM) and 50 immature oocytes for vitrification group (vIVM). The maturation medium was Ham's F10 supplemented with 0.75 IU FSH, 0.75 IU LH and 40 % human follicular fluid (HFF). After 36 h, maturation and morphology of all oocytes were assessed. Also, the oocyte viability was assessed using PI/Hoechst immunostaining technique. RESULTS The maturation rates were reduced in vIVM group (56.0 %) in comparison to fIVM group (88.7 %; P < 0.001). Oocyte viability rate were also reduced in vIVM group (56.0 %) in comparison to fIVM (86.8 %, P < 0.007). CONCLUSIONS Cryopreservation via vitrification reduced both the maturation capacity and viability of human oocytes in IVM technology. It is, therefore, recommended to apply IVM on fresh immature oocytes, instead.
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Can we improve implantation by cancellation of fresh embryo transfer? MIDDLE EAST FERTILITY SOCIETY JOURNAL 2013. [DOI: 10.1016/j.mefs.2012.11.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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The effect of vitrification on ultrastructure of human in vitro matured germinal vesicle oocytes. Eur J Obstet Gynecol Reprod Biol 2013; 167:69-75. [DOI: 10.1016/j.ejogrb.2012.11.006] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2012] [Revised: 09/15/2012] [Accepted: 11/22/2012] [Indexed: 11/18/2022]
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Vanderzwalmen P, Zech NH, Ectors F, Stecher A, Lejeune B, Vanderzwalmen S, Wirleitner B. Blastocyst transfer after aseptic vitrification of zygotes: an approach to overcome an impaired uterine environment. Reprod Biomed Online 2012; 25:591-9. [DOI: 10.1016/j.rbmo.2012.09.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2012] [Revised: 08/02/2012] [Accepted: 09/05/2012] [Indexed: 11/26/2022]
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Tavukcuoglu S, Al-Azawi T, Khaki AA, Al-Hasani S. Is vitrification standard method of cryopreservation. MIDDLE EAST FERTILITY SOCIETY JOURNAL 2012. [DOI: 10.1016/j.mefs.2012.07.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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Liu Y, Peirce K, Yap K, McKenzie K, Natalwala J, Chapple V, Norman M, Matson P. The fate of frozen human embryos when transferred either on the day of thawing or after overnight culture. ASIAN PACIFIC JOURNAL OF REPRODUCTION 2012. [DOI: 10.1016/s2305-0500(13)60075-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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The Alpha consensus meeting on cryopreservation key performance indicators and benchmarks: proceedings of an expert meeting. Reprod Biomed Online 2012; 25:146-67. [DOI: 10.1016/j.rbmo.2012.05.006] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2012] [Revised: 05/11/2012] [Accepted: 05/17/2012] [Indexed: 11/20/2022]
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Wang XL, Zhang X, Qin YQ, Hao DY, Shi HR. Outcomes of day 3 embryo transfer with vitrification using Cryoleaf: a 3-year follow-up study. J Assist Reprod Genet 2012; 29:883-9. [PMID: 22684538 DOI: 10.1007/s10815-012-9814-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2012] [Accepted: 05/28/2012] [Indexed: 10/28/2022] Open
Abstract
OBJECTIVE To compare success rates of vitrified-warmed with fresh and frozen-thawed ETs DESIGN Retrospective. SETTING Public fertility center. PATIENT(S) Cryopreserved- thawed/warmed ETs were included in this study. Fresh cycles, in which supernumerary embryos were cryopreserved, were set as the fresh control group. INTERVENTION(S) Supernumerary day 3 embryos were cryopreserved by slow-freezing or vitrification and transferred after thawing or warming. MAIN OUTCOME MEASURE(S) Comparison of two cryopreservation techniques with respect to post-thaw survival of embryos, implantation and pregnancy rates, neonatal outcome, and congenital birth defects. RESULTS A total of 962 fresh, 151 freezing-thawed and 300 vitrified-warmed cycles were included in this study. The survival and intact cell rates in the vitrification group were significantly higher compared with those in the slow freezing group (88.5 % vs 74.5 % and 86.6 % vs 64.0 %). The implantation, clinical pregnancy and live birth rates of the vitrification group were similar to the fresh and significant higher than slow freezing group. There were no significant differences in mean gestational age, birth weight, stillbirth, birth defects and the prevalence of neonatal diseases among three groups. CONCLUSION Vitrified-warmed ETs yield comparable outcomes with fresh ETs and is superior to frozen-thawed ETs regarding the survival rate and clinical outcomes.
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Affiliation(s)
- Xing-ling Wang
- Department of gynecology, the first affiliated hospital of Zhengzhou University, Zheng Zhou, China
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Edgar DH, Gook DA. A critical appraisal of cryopreservation (slow cooling versus vitrification) of human oocytes and embryos. Hum Reprod Update 2012; 18:536-54. [PMID: 22537859 DOI: 10.1093/humupd/dms016] [Citation(s) in RCA: 215] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
BACKGROUND Vitrification is now a commonly applied technique for cryopreservation in assisted reproductive technology (ART) replacing, in many cases, conventional slow cooling methodology. This review examines evidence relevant to comparison of the two approaches applied to human oocytes and embryos at different developmental stages. METHODS Critical review of the published literature using PubMed with particular emphasis on studies which include data on survival and implantation rates, data from fresh control groups and evaluation of the two approaches in a single setting. RESULTS Slow cooling is associated with lower survival rates and compromised development relative to vitrification when applied to metaphase II (MII) oocytes, although the vitrification results have predominantly been obtained using direct contact with liquid nitrogen and there is some evidence that optimal protocols for slow cooling of MII oocytes are yet to be established. There are no prospective randomized controlled trials (RCTs) which support the use of either technique with pronuclear oocytes although vitrification has become the method of choice. Optimal slow cooling, using modifications of traditional methodology, and vitrification can result in high survival rates of early embryos, which implant at the same rate as equivalent fresh counterparts. Many studies report high survival and implantation rates following vitrification of blastocysts. Although slow cooling of blastocysts has been reported to be inferior in some studies, others comparing the two approaches in the same clinical setting have demonstrated comparable results. The variation in the extent of embryo selection applied in studies can lead to apparent differences in clinical efficiency, which may not be significant if expressed on a 'per oocyte used' basis. CONCLUSIONS Available evidence suggests that vitrification is the current method of choice when cryopreserving MII oocytes. Early cleavage stage embryos can be cryopreserved with equal success using slow cooling and vitrification. Successful blastocyst cryopreservation may be more consistently achieved with vitrification but optimal slow cooling can produce similar results. There are key limitations associated with the available evidence base, including a paucity of RCTs, limited reporting of live birth outcomes and limited reporting of detail which would allow assessment of the impact of differences in female age. While vitrification has a clear role in ART, we support continued research to establish optimal slow cooling methods which may assist in alleviating concerns over safety issues, such as storage, transport and the use of very high cryoprotectant concentrations.
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Affiliation(s)
- David H Edgar
- Reproductive Services/Melbourne IVF, Royal Women's Hospital, Parkville, Victoria 3052, Australia
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Fiedler K, Ezcurra D. Predicting and preventing ovarian hyperstimulation syndrome (OHSS): the need for individualized not standardized treatment. Reprod Biol Endocrinol 2012; 10:32. [PMID: 22531097 PMCID: PMC3403873 DOI: 10.1186/1477-7827-10-32] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2011] [Accepted: 04/24/2012] [Indexed: 11/13/2022] Open
Abstract
Ovarian hyperstimulation syndrome (OHSS) is the most serious complication of controlled ovarian stimulation (COS) as part of assisted reproductive technologies (ART). While the safety and efficacy of ART is well established, physicians should always be aware of the risk of OHSS in patients undergoing COS, as it can be fatal. This article will briefly present the pathophysiology of OHSS, including the key role of vascular endothelial growth factor (VEGF), to provide the foundation for an overview of current techniques for the prevention of OHSS. Risk factors and predictive factors for OHSS will be presented, as recognizing these risk factors and individualizing the COS protocol appropriately is the key to the primary prevention of OHSS, as the benefits and risks of each COS strategy vary among individuals. Individualized COS (iCOS) could effectively eradicate OHSS, and the identification of hormonal, functional and genetic markers of ovarian response will facilitate iCOS. However, if iCOS is not properly applied, various preventive measures can be instituted once COS has begun, including cancelling the cycle, coasting, individualizing the human chorionic gonadotropin trigger dose or using a gonadotropin-releasing hormone (GnRH) agonist (for those using a GnRH antagonist protocol), the use of intravenous fluids at the time of oocyte retrieval, and cryopreserving/vitrifying all embryos for subsequent transfer in an unstimulated cycle. Some of these techniques have been widely adopted, despite the scarcity of data from randomized clinical trials to support their use.
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Affiliation(s)
- Klaus Fiedler
- Kinderwunsch Centrum München (KCM) (Fertility Center Munich), Lortzingstr. 26, D-81241, Munich, Germany
| | - Diego Ezcurra
- Merck Serono S.A. – Geneva (an affiliate of Merck KGaA, Darmstadt, Germany), 9 Chemin des Mines, Geneva, CH-1202, Switzerland
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Valbuena D, Póo ME, Aguilar-Gallardo C, Martinez S, Cobo AC, Pellicer A, Simón C. Comparison of Cryotip vs. Cryotop for mouse and human blastomere vitrification. Fertil Steril 2012; 97:209-17. [DOI: 10.1016/j.fertnstert.2011.10.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2011] [Revised: 10/07/2011] [Accepted: 10/07/2011] [Indexed: 11/16/2022]
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Al-Hasani S, Schöpper B, Schultze-Mosgau A, Griesinger G, Diedrich K. Vitrifikation mit dem Cryotop-Verfahren. GYNAKOLOGISCHE ENDOKRINOLOGIE 2011. [DOI: 10.1007/s10304-011-0431-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Comparison of two different media for vitrification and rewarming of human zygotes: Prospective randomized study. MIDDLE EAST FERTILITY SOCIETY JOURNAL 2011. [DOI: 10.1016/j.mefs.2011.02.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Parmegiani L, Cognigni GE, Bernardi S, Cuomo S, Ciampaglia W, Infante FE, Tabarelli de Fatis C, Arnone A, Maccarini AM, Filicori M. Efficiency of aseptic open vitrification and hermetical cryostorage of human oocytes. Reprod Biomed Online 2011; 23:505-12. [PMID: 21843968 DOI: 10.1016/j.rbmo.2011.07.003] [Citation(s) in RCA: 108] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2010] [Revised: 06/29/2011] [Accepted: 07/01/2011] [Indexed: 11/17/2022]
Abstract
The present study reports, as far as is known for the first time, the safety of UV sterilization of liquid nitrogen and hermetical cryostorage of human oocytes by comparing the efficiency of fresh and vitrified sibling oocytes of infertile patients. A prospective randomized study on sibling oocytes of 31 patients was carried out. Metaphase-II oocytes were randomized for intracytoplasmic sperm injection and the supernumerary sibling oocytes were vitrified using a novel Cryotop aseptic procedure (UV liquid nitrogen sterilization and hermetical cryostorage). After unsuccessful attempts with fresh oocytes, vitrified sibling oocytes were injected. Mean outcome measures observed were fertilization, cleavage and top-quality embryo rates. No significant differences were observed between the fresh and vitrified-warmed sibling oocytes: oocyte fertilization was 88.3% versus 84.9%; cleavage 72.6% versus 71.0%; top-quality embryos 33.8% versus 26.3% and mean number of transferred embryos 2.6 ± 0.1 versus 2.5 ± 0.1, respectively. Clinical pregnancy rate per cycle with vitrified-warmed oocytes was 35.5% (implantation rate 17.1%) and seven healthy babies were born. This study demonstrated that UV liquid nitrogen sterilization and hermetical cryostorage does not adversely affect the developmental competence of vitrified oocytes, allowing safe aseptic open vitrification applicable under strict directives on tissue manipulation.
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Affiliation(s)
- L Parmegiani
- Reproductive Medicine Unit, GynePro Medical Centers, Bologna, Italy.
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Ovarian hyperstimulation syndrome prevention by gonadotropin-releasing hormone agonist triggering of final oocyte maturation in a gonadotropin-releasing hormone antagonist protocol in combination with a “freeze-all” strategy: a prospective multicentric study. Fertil Steril 2011; 95:2029-33, 2033.e1. [DOI: 10.1016/j.fertnstert.2011.01.163] [Citation(s) in RCA: 136] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2010] [Revised: 01/25/2011] [Accepted: 01/26/2011] [Indexed: 11/22/2022]
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Comparison outcome of fresh and vitrified donor oocytes in an egg-sharing donation program. Fertil Steril 2011; 95:1996-2000. [DOI: 10.1016/j.fertnstert.2011.02.035] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2010] [Revised: 02/14/2011] [Accepted: 02/15/2011] [Indexed: 11/19/2022]
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Macas E, Xie M, Schaufelberger S, Merki-Feld GS, Stiller R, Imthurn B. Vitrification of human single pronuclear oocytes following two approaches to polar body biopsy. Reprod Biomed Online 2011; 22:376-81. [DOI: 10.1016/j.rbmo.2011.01.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2010] [Revised: 11/29/2010] [Accepted: 01/11/2011] [Indexed: 10/18/2022]
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Beyer DA, Amari F, Diedrich K, Al Hasani S. Embryo survival after vitrification of 2 PN oocytes. MIDDLE EAST FERTILITY SOCIETY JOURNAL 2011. [DOI: 10.1016/j.mefs.2010.08.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Dowling-Lacey D, Mayer JF, Jones E, Bocca S, Stadtmauer L, Oehninger S. Live birth from a frozen–thawed pronuclear stage embryo almost 20 years after its cryopreservation. Fertil Steril 2011; 95:1120.e1-3. [DOI: 10.1016/j.fertnstert.2010.08.056] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2010] [Revised: 06/30/2010] [Accepted: 08/10/2010] [Indexed: 11/28/2022]
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Efficacy of oocyte vitrification combined with blastocyst stage transfer in an egg donation program. Hum Reprod 2011; 26:782-90. [DOI: 10.1093/humrep/der008] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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García JI, Noriega-Portella L, Noriega-Hoces L. Effect of vitrification procedure on chromosomal status of embryos achieved from vitrified and fresh oocytes. Health (London) 2011. [DOI: 10.4236/health.2011.37077] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Rahim A, Devroey P, Diedrich K, Al-Hasani S. Cancellation of fresh embryo transfer: A future perspective. MIDDLE EAST FERTILITY SOCIETY JOURNAL 2010. [DOI: 10.1016/j.mefs.2010.09.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Zhang J, Chang L, Sone Y, Silber S. Minimal ovarian stimulation (mini-IVF) for IVF utilizing vitrification and cryopreserved embryo transfer. Reprod Biomed Online 2010; 21:485-95. [DOI: 10.1016/j.rbmo.2010.06.033] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2010] [Revised: 06/14/2010] [Accepted: 06/15/2010] [Indexed: 11/29/2022]
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Busso CE, Garcia-Velasco JA, Simon C, Pellicer A. Prevention of OHSS: Current strategies and new insights. MIDDLE EAST FERTILITY SOCIETY JOURNAL 2010. [DOI: 10.1016/j.mefs.2010.06.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
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Parmegiani L, Accorsi A, Cognigni GE, Bernardi S, Troilo E, Filicori M. Sterilization of liquid nitrogen with ultraviolet irradiation for safe vitrification of human oocytes or embryos. Fertil Steril 2010; 94:1525-1528. [DOI: 10.1016/j.fertnstert.2009.05.089] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2009] [Revised: 05/14/2009] [Accepted: 05/21/2009] [Indexed: 10/20/2022]
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