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Biomolecular Pathways of Cryoinjuries in Low-Temperature Storage for Mammalian Specimens. Bioengineering (Basel) 2022; 9:bioengineering9100545. [PMID: 36290513 PMCID: PMC9598205 DOI: 10.3390/bioengineering9100545] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 09/26/2022] [Accepted: 09/30/2022] [Indexed: 11/22/2022] Open
Abstract
Low-temperature preservation could effectively extend in vitro storage of biological materials due to delayed or suspended cellular metabolism and decaying as illustrated by the Arrhenius model. It is widely used as an enabling technology for a variety of biomedical applications such as cell therapeutics, assisted reproductive technologies, organ transplantation, and mRNA medicine. Although the technology to minimize cryoinjuries of mammalian specimens during preservation has been advanced substantially over past decades, mammalian specimens still suffer cryoinjuries under low-temperature conditions. Particularly, the molecular mechanisms underlying cryoinjuries are still evasive, hindering further improvement and development of preservation technologies. In this paper, we systematically recapitulate the molecular cascades of cellular injuries induced by cryopreservation, including apoptosis, necroptosis, ischemia-reperfusion injury (IRI). Therefore, this study not only summarizes the impact of low-temperature preservations on preserved cells and organs on the molecular level, but also provides a molecular basis to reduce cryoinjuries for future exploration of biopreservation methods, materials, and devices.
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Yang IJ, Wu MY, Chao KH, Wei SY, Tsai YY, Huang TC, Chen MJ, Chen SU. Usage and cost-effectiveness of elective oocyte freezing: a retrospective observational study. Reprod Biol Endocrinol 2022; 20:123. [PMID: 35974356 PMCID: PMC9380307 DOI: 10.1186/s12958-022-00996-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/21/2022] [Accepted: 08/04/2022] [Indexed: 11/21/2022] Open
Abstract
BACKGROUND The previous model-based cost-effectiveness analyses regarding elective oocyte cryopreservation remained debatable, while the usage rate may influence the cost per live birth. The aim of this study is to disclose the usage and cost-effectiveness of the planned cryopreserved oocytes after oocyte thawing in real-world situations. METHODS This was a retrospective single-center observational study. Women who electively cryopreserved oocytes and returned to thaw the oocytes were categorized as thawed group. The oocytes were fertilized at our center and the sperm samples for each individual was retrieved from their respective husbands. Clinical outcomes were traced and the cumulative live birth rate per thawed case was calculated. The costs from oocyte freezing cycles to oocyte thawing, and embryo transfer cycles were accordingly estimated. The cumulative cost per live birth was defined by the cumulative cost divided by the live births per thawed case. RESULTS We recruited 645 women with 840 oocyte retrieval cycles for elective oocyte freezing from November 2002 to December 2020. The overall usage rate was 8.4% (54/645). After the storage duration exceeded ten years, the probabilities of thawing oocytes were 10.6%, 26.6%, and 12.7% from women who cryopreserved their oocytes at the age ≤ 35 years, 36-39 years, and ≥ 40 years, respectively (P = 0.304). Among women who thawed their oocytes, 31.5% (17/54) of women achieved at least one live birth. For the age groups of ≤ 35 years, 36-39 years, and ≥ 40 years, the cumulative live birth rates per thawed case were 63.6%, 42.3%, and 17.6%, respectively (P = 0.045), and the cumulative costs for one live birth were $11,704, $17,189, and $35,642, respectively (P < 0.001). CONCLUSIONS The overall usage rate was 8.4% in our cohort. The cumulative live birth rate was greatest in the youngest group and the cumulative cost per live birth was highest in the oldest group, which was threefold greater than that in the group aged ≤ 35 years. The findings added to the limited evidence of the usage rate in real-world situations, which could hopefully aid future analysis and decision-making in public health policy and for women willing to preserve fertility. TRIAL REGISTRATION None.
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Affiliation(s)
- Ih-Jane Yang
- Department of Obstetrics and Gynecology, National Taiwan University Hospital, Number 8, Chung Shan South Road, Taipei City, 100, Taiwan
- Department of Obstetrics and Gynecology, National Taiwan University Hospital, Yunlin Branch, Yunlin County, 640, Taiwan
- Graduate Institute of Clinical Medicine, College of Medicine, National Taiwan University, Taipei City, 100, Taiwan
| | - Ming-Yih Wu
- Department of Obstetrics and Gynecology, National Taiwan University Hospital, Number 8, Chung Shan South Road, Taipei City, 100, Taiwan
| | - Kuang-Han Chao
- Department of Obstetrics and Gynecology, National Taiwan University Hospital, Number 8, Chung Shan South Road, Taipei City, 100, Taiwan
| | - Shin-Yi Wei
- Department of Obstetrics and Gynecology, National Taiwan University Hospital, Number 8, Chung Shan South Road, Taipei City, 100, Taiwan
| | - Yi-Yi Tsai
- Department of Obstetrics and Gynecology, National Taiwan University Hospital, Number 8, Chung Shan South Road, Taipei City, 100, Taiwan
| | - Ting-Chi Huang
- Department of Obstetrics and Gynecology, National Taiwan University Hospital, Number 8, Chung Shan South Road, Taipei City, 100, Taiwan
- Department of Obstetrics and Gynecology, National Taiwan University Hospital, Hsin-Chu Branch, Hsinchu City, 302, Taiwan
| | - Mei-Jou Chen
- Department of Obstetrics and Gynecology, National Taiwan University Hospital, Number 8, Chung Shan South Road, Taipei City, 100, Taiwan
- Livia Shangyu Wan Chair Professor of Obstetrics and Gynecology, College of Medicine, National Taiwan University, Taipei City, 100, Taiwan
| | - Shee-Uan Chen
- Department of Obstetrics and Gynecology, National Taiwan University Hospital, Number 8, Chung Shan South Road, Taipei City, 100, Taiwan.
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Six-year follow-up of children born from vitrified oocytes. Reprod Biomed Online 2020; 42:564-571. [PMID: 33402254 DOI: 10.1016/j.rbmo.2020.11.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Revised: 11/01/2020] [Accepted: 11/06/2020] [Indexed: 01/07/2023]
Abstract
RESEARCH QUESTION Are children born from vitrified-warmed oocytes physically or mentally different from naturally conceived children? DESIGN Intracytoplasmic sperm injection (ICSI) of vitrified-warmed oocytes was performed for 282 patients (307 cycles) from August 2000 to March 2020. Long-term follow-up of children born from vitrified-warmed oocytes was performed via a questionnaire that was sent to the parents at regular intervals from 3 to 72 months after the child's birth. Questionnaires were sent 11 times from birth to the age of 6 years. The development of motor function and mental status was evaluated as the primary outcome, based on the reported data. Subsequently, patients were divided into four groups by age at oocyte retrieval (20-29, 30-34, 35-39, and 40 years or older). Clinical outcomes were calculated as a secondary outcome. RESULTS For the 282 patients, the birth of 116 babies was reported (110 singletons and three sets of twins), and seven cases are, at the time of writing, unconfirmed. The results of the survey found physical parameters in singletons to be equivalent to the nationally reported average data issued by the Ministry of Health, Labor and Welfare of Japan. CONCLUSION This is the first follow-up report of children born from vitrified-warmed oocytes followed by ICSI. The data suggested that the responses from the study participants on the mental and physical development of children were comparable to the data reported by the government, although more responses from patients should be collected to allow further study.
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Quan G, Wu G, Hong Q. Oocyte Cryopreservation Based in Sheep: The Current Status and Future Perspective. Biopreserv Biobank 2017; 15:535-547. [DOI: 10.1089/bio.2017.0074] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Affiliation(s)
- Guobo Quan
- Department of Herbivore Science, Yunnan Animal Science and Veterinary Institute, Kunming, Yunnan Province, China
- Department of Animal Biosciences, University of Guelph, Guelph, Ontario, Canada
| | - Guoquan Wu
- Department of Herbivore Science, Yunnan Animal Science and Veterinary Institute, Kunming, Yunnan Province, China
| | - Qionghua Hong
- Department of Herbivore Science, Yunnan Animal Science and Veterinary Institute, Kunming, Yunnan Province, China
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Hosseini SM, Nasr-Esfahani MH. What does the cryopreserved oocyte look like? A fresh look at the characteristic oocyte features following cryopreservation. Reprod Biomed Online 2016; 32:377-87. [DOI: 10.1016/j.rbmo.2015.12.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Revised: 11/10/2015] [Accepted: 12/15/2015] [Indexed: 11/26/2022]
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Dou R, Saunders RE, Mohamet L, Ward CM, Derby B. High throughput cryopreservation of cells by rapid freezing of sub-μl drops using inkjet printing--cryoprinting. LAB ON A CHIP 2015; 15:3503-3513. [PMID: 26190571 DOI: 10.1039/c5lc00674k] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We have successfully used inkjet printing to cryopreserve 3T3 mouse fibroblast cells and human neuroprogenitor cells (NPCs) derived from human embryonic stem cells (hESCs). Sessile drops of volume 114 nl were formed by printing cell suspensions containing dimethyl sulphoxide (DMSO) as a cryoprotection agent (CPA) at rates in the region 100 Hz-20 kHz, from individual droplets of 380 pl. After printing and a freeze/thaw cycle (with a minimum 24 hours hold period at liquid N2 temperature), 3T3 cells showed an average viability of >90% with CPA concentration <0.8 M at all drop deposition rates. This is a significantly lower CPA concentration than normally used with conventional cryopreservation methods. Cell viability shows a small variation with the polymer substrates used, with the best results obtained using a polyimide substrate. The viability of 3T3 cells after 2 months storage at liquid nitrogen temperature was slightly reduced compared to the cells held for 24 hours but there was no significant further deterioration after 4 or 6 months storage. The viability of NPCs after an identical freeze/thaw cycle were only 55% but this is comparable with conventional cryopreservation methods that use much higher CPA concentrations. A parallel series of experiments printing cells onto substrates held at 195 K or directly into liquid N2 showed considerable variation in cell survival rate with drop deposition rate. Cell suspensions required higher levels of CPA than when printing followed by freezing. At low deposition rates a combination of DMSO and polyethylene glycol (PEG) was needed to allow cell viability after freezing. These results show that inkjet printing provides a practical high throughput method for the cryopreservation of cells with lower CPA concentrations than are required for current low volume cryopreservation methods.
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Affiliation(s)
- Rui Dou
- School of Materials, University of Manchester, Manchester M13 9PL, UK.
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Abstract
Preservation of fertility is an important issue in the management of young cancer patients. Though embryo cryostorage is a well-established procedure, it can only be availed by couples. Recent studies have indicated increasing success rates with mature and immature oocyte cryopreservation. Cryostorage induces injuries on the human oocytes which can be minimized by slow freezing and vitrification. Selection of candiidates is crucial so that the most suitable technique can be offered without any delay in initiation of cancer therapy. Factors affecting suitability are age of patient, assessment of ovarian reserve, hormonal status and type and stage of neoplastic disease. Encouraging results have been obtained with oocyte in vitro maturation (IVM) followed by vitrification for cryostorage. Data on the use of vitrified eggs in routine in vitro fertilization (IVF) show that pregnancy rates can be comparable to those achieved with fresh oocytes.
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Affiliation(s)
- Sharmila Dudani
- Department of Pathology, Army College of Medical Sciences, Delhi Cantonment, New Delhi, India
| | - Apurva Gupta
- Department of Gynaecology, Paras Spring Meadows Hospital, East of Kailash, New Delhi, India
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Tsai YY, Chen SU, Shieh CJ, Yao YL, Yang YS, Chen CD. Live birth after single embryo transfer of autologous cryopreserved oocytes from a patient with myelodysplastic syndrome who underwent allogenic peripheral blood stem cell transplantation. J Formos Med Assoc 2014; 113:966-9. [PMID: 25294099 DOI: 10.1016/j.jfma.2014.08.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Revised: 08/27/2014] [Accepted: 08/29/2014] [Indexed: 11/18/2022] Open
Affiliation(s)
- Yi-Yi Tsai
- Department of Obstetrics and Gynecology, National Taiwan University Hospital and College of Medicine, Taipei, Taiwan
| | - Shee-Uan Chen
- Department of Obstetrics and Gynecology, National Taiwan University Hospital and College of Medicine, Taipei, Taiwan
| | - Chia-Jen Shieh
- Department of Obstetrics and Gynecology, National Taiwan University Hospital and College of Medicine, Taipei, Taiwan
| | - Yi-Lin Yao
- Department of Obstetrics and Gynecology, National Taiwan University Hospital and College of Medicine, Taipei, Taiwan
| | - Yu-Shih Yang
- Department of Obstetrics and Gynecology, National Taiwan University Hospital and College of Medicine, Taipei, Taiwan
| | - Chin-Der Chen
- Department of Obstetrics and Gynecology, National Taiwan University Hospital and College of Medicine, Taipei, Taiwan.
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Oocyte vitrification in the 21st century and post-warming fertility outcomes: a systematic review and meta-analysis. Reprod Biomed Online 2014; 29:159-76. [DOI: 10.1016/j.rbmo.2014.03.024] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Revised: 03/20/2014] [Accepted: 03/25/2014] [Indexed: 11/20/2022]
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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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Cil AP, Bang H, Oktay K. Age-specific probability of live birth with oocyte cryopreservation: an individual patient data meta-analysis. Fertil Steril 2013; 100:492-9.e3. [PMID: 23706339 DOI: 10.1016/j.fertnstert.2013.04.023] [Citation(s) in RCA: 103] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2013] [Revised: 04/08/2013] [Accepted: 04/09/2013] [Indexed: 02/05/2023]
Abstract
OBJECTIVE To estimate age-specific probabilities of live birth with oocyte cryopreservation in nondonor (ND) egg cycles. DESIGN Individual patient data meta-analysis. SETTING Assisted reproduction centers. PATIENT(S) Infertile patients undergoing ND mature oocyte cryopreservation. INTERVENTION(S) PubMed was searched for clinical studies on oocyte cryopreservation from January 1996 through July 2011. Randomized and nonrandomized studies that used ND frozen-thawed mature oocytes with pregnancy outcomes were included. Authors of eligible studies were contacted to obtain individual patient data. MAIN OUTCOME MEASURE(S) Live birth probabilities based on age, cryopreservation method, and the number of oocytes thawed, injected, or embryos transferred. RESULT(S) Original data from 10 studies including 2,265 cycles from 1,805 patients were obtained. Live birth success rates declined with age regardless of the freezing technique. Despite this age-induced compromise, live births continued to occur as late as ages 42 and 44 years with slowly frozen and vitrified oocytes, respectively. Estimated probabilities of live birth for vitrified oocytes were higher than those for slowly frozen. CONCLUSION(S) The live birth probabilities we calculated would enable more accurate counseling and informed decisions for infertile women considering oocyte cryopreservation. Given the success probabilities, we suggest that policy makers should consider oocyte freezing as an integral part of prevention and treatment of infertility.
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Affiliation(s)
- Aylin Pelin Cil
- Innovation Institute for Fertility Preservation and IVF, New York, NY 10028, USA
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Wang HL, Huang SC, Jiang WY, Lai HH. Oocyte vitrification in a single woman with diminished ovarian reserve resulting in live birth. Taiwan J Obstet Gynecol 2013; 51:651-3. [PMID: 23276575 DOI: 10.1016/j.tjog.2012.09.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/05/2012] [Indexed: 10/27/2022] Open
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Li DG, Zhu Y, Xing FY, Li SG, Chen XJ, Jiang MX. Microtubule organisation, pronuclear formation and embryonic development of mouse oocytes after intracytoplasmic sperm injection or parthenogenetic activation and then slow-freezing with 1,2-propanediol. Reprod Fertil Dev 2013; 25:609-16. [DOI: 10.1071/rd12124] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2012] [Accepted: 05/07/2012] [Indexed: 11/23/2022] Open
Abstract
The goal of this study was to investigate the effect of cryopreservation on oocytes at different times after intracytoplasmic sperm injection (ICSI) and parthenogenetic activation. The study was performed in mouse oocytes fertilised by ICSI, or in artificially-activated oocytes, which were cryopreserved immediately, one hour or five hours later through slow-freezing. After thawing, the rates of survival, fertilisation–activation, embryonic development of oocytes–zygotes and changes in the cytoskeleton and ploidy were observed. Our results reveal a significant difference in survival rates of 0-, 1- and 5-h cryopreserved oocytes following ICSI and artificial activation. Moreover, significant differences in two pronuclei (PN) development existed between the 0-, 1- and 5-h groups of oocytes frozen after ICSI, while the rates of two-PN development of activated oocytes were different between the 1-h and 5-h groups. Despite these initial differences, there was no difference in the rate of blastocyst formation from two-PN zygotes following ICSI or artificial activation. However, compared with ICSI or artificially-activated oocytes cryopreserved at 5 h, many oocytes from the 0- and 1-h cryopreservation groups developed to zygotes with abnormal ploidy; this suggests that too little time before cryopreservation can result in some activated oocytes forming abnormal ploidy. However, our results also demonstrate that spermatozoa can maintain normal fertilisation capacity in frozen ICSI oocytes and the procedure of freeze–thawing did not affect the later development of zygotes.
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Affiliation(s)
- Dun-Gao Li
- Department of Laboratory Animal Sciences, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
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Zhang X, Catalano PN, Gurkan UA, Khimji I, Demirci U. Emerging technologies in medical applications of minimum volume vitrification. Nanomedicine (Lond) 2012; 6:1115-29. [PMID: 21955080 DOI: 10.2217/nnm.11.71] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Cell/tissue biopreservation has broad public health and socio-economic impact affecting millions of lives. Cryopreservation technologies provide an efficient way to preserve cells and tissues targeting the clinic for applications including reproductive medicine and organ transplantation. Among these technologies, vitrification has displayed significant improvement in post-thaw cell viability and function by eliminating harmful effects of ice crystal formation compared to the traditional slow freezing methods. However, high cryoprotectant agent concentrations are required, which induces toxicity and osmotic stress to cells and tissues. It has been shown that vitrification using small sample volumes (i.e., <1 µl) significantly increases cooling rates and hence reduces the required cryoprotectant agent levels. Recently, emerging nano- and micro-scale technologies have shown potential to manipulate picoliter to nanoliter sample sizes. Therefore, the synergistic integration of nanoscale technologies with cryogenics has the potential to improve biopreservation methods.
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Affiliation(s)
- Xiaohui Zhang
- Bio-Acoustic-MEMS in Medicine (BAMM) Laboratory, Center for Bioengineering, Department of Medicine, Brigham & Women's Hospital, Harvard Medical School, Boston, MA, USA
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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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Oocyte cryostorage to preserve fertility in oncological patients. Obstet Gynecol Int 2012; 2012:525896. [PMID: 22291711 PMCID: PMC3265124 DOI: 10.1155/2012/525896] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2011] [Accepted: 11/22/2011] [Indexed: 12/30/2022] Open
Abstract
Thanks to the progress in oncostatic treatments, young women affected by cancer have a
fairly good chance of surviving the disease and leading a normal post-cancer life. Quite
often, however, polychemiotherapy and/or radiotherapy can induce ovarian damage and
significantly reduce the content of follicles and oocytes inside the ovary, thus predisposing
the patient to menstrual disorders, infertility, and precocious menopause. Several
techniques have been proposed to preserve fertility in these patients; among them oocyte
collection and cryopreservation prior to the oncostatic treatment has been widely applied
in the last decade. The proper indications, the permitting conditions, the available
hormonal stimulation protocols, as well as the effectiveness and limits of this option will be
discussed herein, with a comprehensive and up-to-date review of the two techniques
commonly used to cryostore oocytes, the slow-freezing technique and the vitrification technique.
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Slow controlled-rate freezing of human in vitro matured oocytes: effects on maturation rate and kinetics and parthenogenetic activation. Fertil Steril 2011; 96:624-8. [DOI: 10.1016/j.fertnstert.2011.06.060] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2011] [Revised: 06/16/2011] [Accepted: 06/22/2011] [Indexed: 12/19/2022]
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Yan J, Suzuki J, Yu XM, Qiao J, Kan FWK, Chian RC. Effects of duration of cryo-storage of mouse oocytes on cryo-survival, fertilization and embryonic development following vitrification. J Assist Reprod Genet 2011; 28:643-9. [PMID: 21573683 DOI: 10.1007/s10815-011-9563-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2010] [Accepted: 03/29/2011] [Indexed: 11/26/2022] Open
Abstract
PURPOSE To investigate the effects of cryo-storage duration in liquid nitrogen on oocyte cryo-survival, fertilization and embryonic development following vitrification and warming. METHODS Mature mouse oocytes were vitrified with McGill Cryoleaf and stored in liquid nitrogen for a period of 8-10 days, 90-92 days and 180-182 days, respectively. After warming, the survived oocytes were inseminated by intracytoplasmic sperm injection (ICSI) and cultured for 120 h. The rates of oocyte cryo-survival, cleavage and embryonic development were compared. RESULT(S) The oocyte cryo-survival rate declined following cryo-storage duration for 180-182 days (90.4 ± 7.9%) compared to that of the other two groups (97.4 ± 3.0% and 98.0 ± 3.3%). The fertilization rate in the group of 180-182 days (66.6 ± 22.0%) was also significantly reduced (P < 0.05) compared with the groups of 8-10 days (92.2 ± 10.8%) and 90-92 days (94.7 ± 9.1%). In addition, the number of embryos developed to the blastocyst stage declined significantly (P < 0.05) following long cryo-storage duration (72.1 ± 8.2%, 25.2 ± 3.8% and 5.5 ± 13.6%, respectively). CONCLUSION(S) The cryo-survival, fertilization rate and embryonic development of mouse oocytes are affected significantly, in an adverse manner, by the cryo-storage duration in liquid nitrogen.
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Affiliation(s)
- Jie Yan
- Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China
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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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Martínez-Burgos M, Herrero L, Megías D, Salvanes R, Montoya MC, Cobo AC, Garcia-Velasco JA. Vitrification versus slow freezing of oocytes: effects on morphologic appearance, meiotic spindle configuration, and DNA damage. Fertil Steril 2011; 95:374-7. [DOI: 10.1016/j.fertnstert.2010.07.1089] [Citation(s) in RCA: 96] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2010] [Revised: 07/29/2010] [Accepted: 07/30/2010] [Indexed: 11/29/2022]
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Saragusty J, Arav A. Current progress in oocyte and embryo cryopreservation by slow freezing and vitrification. Reproduction 2011; 141:1-19. [DOI: 10.1530/rep-10-0236] [Citation(s) in RCA: 328] [Impact Index Per Article: 25.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Preservation of female genetics is currently done primarily by means of oocyte and embryo cryopreservation. The field has seen much progress during its four-decade history, progress driven predominantly by research in humans, cows, and mice. Two basic cryopreservation techniques rule the field – controlled-rate freezing, the first to be developed, and vitrification, which, in recent years, has gained a foothold. While much progress has been achieved in human medicine, the cattle industry, and in laboratory animals, this is far from being the case for most other mammals and even less so for other vertebrates. The major strides and obstacles in human and other vertebrate oocyte and embryo cryopreservation will be reviewed here.
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Eroglu A. Cryopreservation of mammalian oocytes by using sugars: Intra- and extracellular raffinose with small amounts of dimethylsulfoxide yields high cryosurvival, fertilization, and development rates. Cryobiology 2010; 60:S54-9. [PMID: 19596315 PMCID: PMC2891843 DOI: 10.1016/j.cryobiol.2009.07.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2009] [Revised: 06/21/2009] [Accepted: 07/02/2009] [Indexed: 01/03/2023]
Abstract
Accumulation of intra- and extracellular sugars such as trehalose, glucose, and raffinose is central to survival strategies of a variety of organisms coping with extreme conditions including freezing and almost complete drying. The objective of the present study was to investigate the potential application of intra- and extracellular raffinose in combination with low concentrations of dimethylsulfoxide (Me(2)SO) to mammalian oocyte cryopreservation. To this end, the fertilization and embryonic development of cryopreserved metaphase II (M II) mouse oocytes were studied in comparison to unfrozen controls. For cryopreservation, M II oocytes were microinjected with 0.1M raffinose, and then cooled to -196 degrees C in the presence of either 0.3M raffinose and 0.5M Me(2)SO (cryopreservation group 1) or 0.3M raffinose and 1.0M Me(2)SO (cryopreservation group 2). The control groups included untreated oocytes (untreated control) and oocytes microinjected with raffinose, but not frozen (injection control). The post-thaw survival rates were 83.9% and 80.6% for the cryopreservation group 1 and 2, respectively. The fertilization and blastocyst rates in the cryopreservation group 1 (90.0% and 77.8%, respectively) and 2 (94.6% and 72.5%, respectively) were also high and similar to the ones of the injection controls (97.8% and 78.5%, respectively) and untreated controls (98.8% and 83.6%, respectively). These results are consistent with the findings of our earlier studies and support the use of sugars as intra- and extracellular cryoprotectants. Furthermore, the results of the present study indicate that the presence of intra- and extracellular sugars alleviates high concentrations of conventional penetrating cryoprotectants, and thus minimizes their toxicity.
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Affiliation(s)
- Ali Eroglu
- Institute of Molecular Medicine and Genetics, Department of Medicine, Medical College of Georgia, Augusta, GA 30912, USA.
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Liu J, Song Y, Cheng KM, Silversides FG. Production of Donor-Derived Offspring from Cryopreserved Ovarian Tissue in Japanese Quail (Coturnix japonica)1. Biol Reprod 2010; 83:15-9. [DOI: 10.1095/biolreprod.110.083733] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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Song Y, Sharp R, Lu F, Hassan M. The future potential of cryopreservation for assisted reproduction. Cryobiology 2010; 60:S60-5. [PMID: 19818745 PMCID: PMC2891376 DOI: 10.1016/j.cryobiol.2009.09.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2009] [Revised: 09/15/2009] [Accepted: 09/21/2009] [Indexed: 01/15/2023]
Abstract
Cryopreservation of human gonadal tissue and oocytes has brought about new and exciting research in reproductive medicine, as well as new cryopreservation techniques that are dramatically improving post-thaw viability and freezing damage. The work done on gonadal tissues is aimed at improving the quality of life for infertile patients and for prepubertal patients undergoing gonadotoxic chemotherapy, patients for whom hormonal stimulation/IVF is not an option, and women without partners. Cryopreservation of mature oocytes is the best model for timing IVF. Vitrification is likely to benefit the field, and since 2005, implantation and pregnancy rates from vitrified oocytes have matched or eclipsed results from conventional methods, due to new cell-specific methods and formulas. Cryopreservation of immature oocytes leads to a new direction of egg banking in future. Preserving ovarian tissue for autografting is still promising and has resulted in folliculogenesis, resumed hormone production and live births in limited cases. The use of small cortical blocks, or mechanical/chemical digestion of ovarian tissue for isolation of follicles is a new direction for ovary preservation for reasons of cryoprotectant permeation and graft revascularization. Maturation of follicles in vitro has become more feasible with the use of alginate microencapsulation. Testicular tissue preservation has taken a sharp turn towards preservation of gonadal stem cells. Research into the mechanism for spermatogenesis points to the ability for male germ cells to resume spermatogenesis. The cryopreservation of minced testicular tissue for isolation of germ cells via chemical digestion has produced viable cells, however, structural damage that may be avoided by vitrification has been noted to the surrounding cell junctions and supporting cells.
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Affiliation(s)
- Ying Song
- Xytex Research Inc., Augusta, Georgia, USA.
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Anchan RM, Ginsburg ES. Fertility concerns and preservation in younger women with breast cancer. Crit Rev Oncol Hematol 2010; 74:175-92. [DOI: 10.1016/j.critrevonc.2009.09.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2006] [Revised: 09/12/2009] [Accepted: 09/24/2009] [Indexed: 12/22/2022] Open
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Preservación de la fertilidad en la mujer. REVISTA MÉDICA CLÍNICA LAS CONDES 2010. [DOI: 10.1016/s0716-8640(10)70556-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Chang CC, Sung LY, Lin CJ, Kort HI, Yang X, Tian XC, Nagy ZP. The oocyte spindle is preserved by 1,2-propanediol during slow freezing. Fertil Steril 2010; 93:1430-9. [DOI: 10.1016/j.fertnstert.2009.01.106] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2008] [Revised: 12/10/2008] [Accepted: 01/09/2009] [Indexed: 10/21/2022]
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Kim TJ, Laufer LR, Hong SW. Vitrification of oocytes produces high pregnancy rates when carried out in fertile women. Fertil Steril 2010; 93:467-74. [DOI: 10.1016/j.fertnstert.2008.12.094] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2008] [Revised: 12/17/2008] [Accepted: 12/18/2008] [Indexed: 11/29/2022]
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Impact of oocyte cryopreservation on embryo development. Fertil Steril 2010; 93:510-6. [DOI: 10.1016/j.fertnstert.2009.01.148] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2008] [Revised: 01/16/2009] [Accepted: 01/27/2009] [Indexed: 11/17/2022]
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Borini A, Levi Setti PE, Anserini P, De Luca R, De Santis L, Porcu E, La Sala GB, Ferraretti A, Bartolotti T, Coticchio G, Scaravelli G. Multicenter observational study on slow-cooling oocyte cryopreservation: clinical outcome. Fertil Steril 2010; 94:1662-8. [PMID: 20047739 DOI: 10.1016/j.fertnstert.2009.10.029] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2009] [Revised: 10/14/2009] [Accepted: 10/19/2009] [Indexed: 11/19/2022]
Abstract
OBJECTIVE To evaluate the efficacy of oocyte cryopreservation by a single slow-cooling protocol involving sucrose (0.2 mol/L) in the freezing solution. DESIGN Observational comparison of the clinical outcome in fresh and frozen thawed cycles. SETTING Public and private IVF centers. PATIENT(S) Infertile couples undergoing IVF treatment. INTERVENTION(S) Use of a maximum three oocytes in fresh cycles, as established by local law, and cryopreservation and later use of surplus oocytes. Likewise fresh cycles, maximum three thawed oocytes were used per cycle. All thawed oocytes were microinjected. MAIN OUTCOME MEASURE(S) Embryologic and clinical parameters of fresh and thawed cycles. RESULT(S) Two thousand forty-six patients underwent 2,209 oocyte retrievals involving oocyte cryopreservation. Overall, the survival rate of thawed oocytes was 55.8%. In 940 thaw cycles, the mean numbers of inseminated oocytes and fertilization rates were significantly decreased vs. fresh cycles outcomes (2.6 ± 0.7 vs. 2.9 ± 0.2 and 72.5% vs. 78.3%, respectively), as were the rates of implantation (10.1% vs. 15.4%), pregnancy rates per transfer (17.0% vs. 27.9%), and pregnancy rates per cycle (13.7% vs. 26.2%). Differences in clinical outcome were found among centers. A pregnancy rate per thawing cycle above 14% was achieved by most clinics. Fifty-seven retrievals involving oocyte cryopreservation achieved a pregnancy after fresh embryo replacement. Implantation and pregnancy rates per embryo transfer and per thawing cycles were 17.5%, 28.6%, and 24.6%, respectively. CONCLUSION(S) Under the conditions tested, the clinical outcome of oocyte slow-cooling cryopreservation is reduced compared with fresh cycles. Nevertheless, in cases of inapplicability of embryo cryopreservation, oocyte cryopreservation should be offered to patients with surplus oocytes.
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Affiliation(s)
- Andrea Borini
- Tecnobios Procreazione, Centre for Reproductive Health, Bologna, Italy.
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Vela G, Luna M, Sandler B, Copperman AB. Advances and Controversies in Assisted Reproductive Technology. ACTA ACUST UNITED AC 2009; 76:506-20. [DOI: 10.1002/msj.20147] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Cutting R, Barlow S, Anderson R, On Behalf of ACE and BFS. Human oocyte cryopreservation: Evidence for practice. HUM FERTIL 2009; 12:125-36. [DOI: 10.1080/14647270903132115] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Noyes N, Porcu E, Borini A. Over 900 oocyte cryopreservation babies born with no apparent increase in congenital anomalies. Reprod Biomed Online 2009; 18:769-76. [PMID: 19490780 DOI: 10.1016/s1472-6483(10)60025-9] [Citation(s) in RCA: 299] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Over the past decade, the number of reported live births resulting from oocyte cryopreservation has rapidly increased. To appreciate the true number of children born, verified live births were tabulated and assessed. A literature search was performed; authors were then contacted to verify birth outcomes and provide updates. A database including all verified live born infants was constructed. A total of 58 reports (1986-2008) were reviewed, which included 609 live born babies (308 from slow freezing, 289 from vitrification and 12 from both methods). Additionally, 327 other live births were verified. Of the total 936 live borns, 1.3% (12) were noted to have birth anomalies: three ventricular septal defects, one choanal and one biliary atresia, one Rubinstein-Taybi syndrome, one Arnold-Chiari syndrome, one cleft palate, three clubfoot and one skin haemangioma. Compared with congenital anomalies occurring in naturally conceived infants, no difference was noted. With more live born data accumulating, this procedure may become mainstream as a fertility preservation option, particularly for women diagnosed with malignancy requiring cytotoxic therapy. A registry would help to assure the safest, most expeditious development of this technology.
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Affiliation(s)
- N Noyes
- Department of Obstetrics and Gynecology, NYU Fertility Center, NYU School of Medicine, New York 10016, USA.
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Ferraretti AP, Lappi M, Magli MC, Muzzonigro F, Resta S, Gianaroli L. Factors affecting thawed oocyte viability suggest a customized policy of embryo transfer. Fertil Steril 2009; 94:1308-1313. [PMID: 19683229 DOI: 10.1016/j.fertnstert.2009.05.088] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2009] [Revised: 05/14/2009] [Accepted: 05/21/2009] [Indexed: 11/29/2022]
Abstract
OBJECTIVE To identify factors that might affect the clinical outcome of oocyte slow freezing. DESIGN Retrospective study. SETTING Reproductive Medicine Unit, Italian Society for the Study of Reproductive Medicine, Bologna, Italy. PATIENT(S) Patients with spare metaphase II cryopreserved oocytes performing 371 thawing cycles. INTERVENTION(S) Oocytes were cryopreserved by slow freezing<40 hours after hCG administration (group A) and >or=40 hours after hCG administration (group B). Thawed oocytes were inseminated by intracytoplasmic sperm injection. MAIN OUTCOME MEASURE(S) Clinical pregnancy, implantation, abortion, and delivery rates. RESULT(S) Clinical pregnancy rate per thawed cycle (PR) and implantation rate (IR) were significantly higher in group A compared with group B both in young (PR: 25% vs. 9.6%; IR: 18.9% vs. 8.8%) and in older patients (PR: 25% vs. 10.1%; IR: 17.5% vs. 6.7%). In the young patient subgroup, clinical pregnancy and implantation rates with three transferred embryos were higher in group A vs. group B (PR: 72.7% vs. 25%, and IR: 36.4% vs. 12.5%, respectively). This difference was not found in the subgroup of older patients. CONCLUSION(S) The timing at which oocyte cryopreservation is performed and the number of transferred embryos play a key role in the clinical outcome. The suggested cut-off time for cryopreservation is between 39 and 40 hours after hCG administration.
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Affiliation(s)
- Anna P Ferraretti
- Reproductive Medicine Unit, Italian Society for the Study of Reproductive Medicine, Bologna, Italy
| | - Michela Lappi
- Reproductive Medicine Unit, Italian Society for the Study of Reproductive Medicine, Bologna, Italy
| | - M Cristina Magli
- Reproductive Medicine Unit, Italian Society for the Study of Reproductive Medicine, Bologna, Italy
| | - Francesca Muzzonigro
- Reproductive Medicine Unit, Italian Society for the Study of Reproductive Medicine, Bologna, Italy
| | - Silvia Resta
- Reproductive Medicine Unit, Italian Society for the Study of Reproductive Medicine, Bologna, Italy
| | - Luca Gianaroli
- Reproductive Medicine Unit, Italian Society for the Study of Reproductive Medicine, Bologna, Italy.
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Abstract
SummaryObjective: To investigate the effects of various activation methods on freeze–thawed rabbit oocytes developmental potential. Methods: Rabbit oocytes were vitrified by cryoleafs and cryoprotected with ethylene glycol and propanediol. After thawing, the oocytes were fertilized by intracytoplasmic sperm injection (ICSI). Surviving oocytes after ICSI were divided into five groups at random. Group 1: Oocytes (n = 30) activated 1 h after ICSI by calcium ionomycin (I0634); Group 2: Oocytes (n = 26) activated by strontium chloride an hour after ICSI; Group 3: Oocytes (n = 33) activated by I0634 twice; Group 4: Oocytes (n = 28) were activated by strontium chloride twice; Control Group: Inactivated oocytes (n = 39). Blastocysts derived from each group were transplanted to recipient rabbits. Results: Rates of fertilization, cleavage and blastocyst formation of Group 3 were higher than those of Group 1 and Group 2 (81.8% vs 33.3% vs 53.8%, 54.5% vs 16.7% vs 26.9%, p < 0.05; 15.2% vs 3.3% vs 7.7%, p > 0.05). The rabbit transplanted with embryos derived from Group 3 became pregnant. Embryos derived from double activation could implant into endometrium. Conclusion: Double activation may increase freeze–thawed oocytes developmental potential. After activation, oocytes cleavage velocity may be faster than that of oocytes without activation.
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Konc J, Kanyo K, Varga E, Kriston R, Cseh S. Births Resulting from Oocyte Cryopreservation Using a Slow Freezing Protocol with Propanediol and Sucrose. Syst Biol Reprod Med 2009; 54:205-10. [DOI: 10.1080/19396360802415778] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Xu M, West-Farrell ER, Stouffer RL, Shea LD, Woodruff TK, Zelinski MB. Encapsulated three-dimensional culture supports development of nonhuman primate secondary follicles. Biol Reprod 2009; 81:587-94. [PMID: 19474063 DOI: 10.1095/biolreprod.108.074732] [Citation(s) in RCA: 139] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
In vitro ovarian follicle cultures may provide fertility-preserving options to women facing premature infertility due to cancer therapies. An encapsulated three-dimensional (3-D) culture system utilizing biomaterials to maintain cell-cell communication and support follicle development to produce a mature oocyte has been developed for the mouse. We tested whether this encapsulated 3-D system would also support development of nonhuman primate preantral follicles, for which in vitro growth has not been reported. Three questions were investigated: Does the cycle stage at which the follicles are isolated affect follicle development? Does the rigidity of the hydrogel influence follicle survival and growth? Do follicles require luteinizing hormone (LH), in addition to follicle-stimulating hormone (FSH), for steroidogenesis? Secondary follicles were isolated from adult rhesus monkeys, encapsulated within alginate hydrogels, and cultured individually for </=30 days. Follicles isolated from the follicular phase of the menstrual cycle had a higher survival rate (P < 0.05) than those isolated from the luteal phase; however, this difference may also be attributed to differing sizes of follicles isolated during the different stages. Follicles survived and grew in two hydrogel conditions (0.5% and 0.25% alginate). Follicle diameters increased to a greater extent (P < 0.05) in the presence of FSH alone than in FSH plus LH. Regardless of gonadotropin treatment, follicles produced estradiol, androstenedione, and progesterone by 14-30 days in vitro. Thus, an alginate hydrogel maintains the 3-D structure of individual secondary macaque follicles, permits follicle growth, and supports steroidogenesis for </=30 days in vitro. This study documents the first use of the alginate system to maintain primate tissue architecture, and findings suggest that encapsulated 3-D culture will be successful in supporting the in vitro development of human follicles.
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Affiliation(s)
- Min Xu
- Department of Obstetrics and Gynecology, Northwestern University Feinberg School of Medicine, and The Robert H. Lurie Comprehensive Cancer Center of Northwestern University, Chicago, Illinois, USA
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Children born after cryopreservation of embryos or oocytes: a systematic review of outcome data. Hum Reprod 2009; 24:2158-72. [DOI: 10.1093/humrep/dep125] [Citation(s) in RCA: 214] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Parmegiani L, Bertocci F, Garello C, Salvarani MC, Tambuscio G, Fabbri R. Efficiency of human oocyte slow freezing: results from five assisted reproduction centres. Reprod Biomed Online 2009; 18:352-9. [PMID: 19298734 DOI: 10.1016/s1472-6483(10)60093-4] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
It has been demonstrated previously that freezing oocytes within 2 h of retrieval increases the efficiency of cryopreservation via a slow-freezing/rapid-thawing protocol with 0.3 mol/l sucrose (SF/RT 0.3). The aim of this multicentre survey was to verify this observation on a larger scale. This was a retrospective study on the clinical outcome of 510 SF/RT 0.3 cycles divided into two groups: group A, freezing oocytes within 2 h of retrieval; group B, freezing oocytes more than 2 h after retrieval. The rate of best-quality embryos was significantly higher (33.24%) in group A than in group B (16.20%, P < 0.001). Pregnancy and implantation rates were 30.07% and 15.08% in group A versus 8.97% and 4.57% in group B (P < 0.001). Clinical pregnancy rates per thawed and per injected oocyte in group A were 5.53% and 10.41%, versus 1.46% and 2.77% in group B (P < 0.001). The overall yield from oocytes cryopreserved within 2 h of retrieval (group A) was 6.49 implantations per 100 oocytes thawed versus 1.74 for group B (P < 0.001). Embryo quality, pregnancy and implantation rates, and clinical efficiency of thawing cycles were all significantly improved when cryopreservation was carried out within 2 h of oocyte retrieval.
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Affiliation(s)
- L Parmegiani
- Reproductive Medicine Unit, GynePro Medical Centres, Bologna, Italy.
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Gualtieri R, Iaccarino M, Mollo V, Prisco M, Iaccarino S, Talevi R. Slow cooling of human oocytes: ultrastructural injuries and apoptotic status. Fertil Steril 2009; 91:1023-34. [PMID: 18367177 DOI: 10.1016/j.fertnstert.2008.01.076] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2007] [Revised: 01/11/2008] [Accepted: 01/22/2008] [Indexed: 10/22/2022]
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Molloy D, Hall BA, Ilbery M, Irving J, Harrison KL. Oocyte freezing: timely reproductive insurance? Med J Aust 2009; 190:247-9. [DOI: 10.5694/j.1326-5377.2009.tb02385.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2008] [Accepted: 01/13/2009] [Indexed: 11/17/2022]
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Chen SU, Yang YS. Slow Freezing or Vitrification of Oocytes: Their Effects on Survival and Meiotic Spindles, and the Time Schedule for Clinical Practice. Taiwan J Obstet Gynecol 2009; 48:15-22. [DOI: 10.1016/s1028-4559(09)60030-9] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Varghese AC, Peter Nagy Z, Agarwal A. Current trends, biological foundations and future prospects of oocyte and embryo cryopreservation. Reprod Biomed Online 2009. [DOI: 10.1016/s1472-6483(10)60181-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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46
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Current trends, biological foundations and future prospects of oocyte and embryo cryopreservation. Reprod Biomed Online 2009; 19:126-40. [DOI: 10.1016/s1472-6483(10)60056-9] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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47
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Parmegiani L, Garello C, Granella F, Guidetti D, Bernardi S, Cognigni GE, Revelli A, Filicori M. Long-term cryostorage does not adversely affect the outcome of oocyte thawing cycles. Reprod Biomed Online 2009; 19:374-9. [DOI: 10.1016/s1472-6483(10)60171-x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Shanshan Gao, Yuan Li, Xuan Gao, Jingmei Hu, Huijun Yang, Chen ZJ. Spindle and Chromosome Changes of Human MII Oocytes During Incubation After Slow Freezing/Fast Thawing Procedures. Reprod Sci 2008; 16:391-6. [DOI: 10.1177/1933719108327590] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Shanshan Gao
- Center for Reproductive Medicine, Provincial Hospital Affiliated to Shandong University, Jinan, 250021, China, Key Laboratory of Reproductive Medicine, Shandong Province, China
| | - Yuan Li
- Center for Reproductive Medicine, Provincial Hospital Affiliated to Shandong University, Jinan, 250021, China, Key Laboratory of Reproductive Medicine, Shandong Province, China
| | - Xuan Gao
- Center for Reproductive Medicine, Provincial Hospital Affiliated to Shandong University, Jinan, 250021, China, Key Laboratory of Reproductive Medicine, Shandong Province, China
| | - Jingmei Hu
- Center for Reproductive Medicine, Provincial Hospital Affiliated to Shandong University, Jinan, 250021, China, Key Laboratory of Reproductive Medicine, Shandong Province, China
| | - Huijun Yang
- Center for Reproductive Medicine, Provincial Hospital Affiliated to Shandong University, Jinan, 250021, China, Key Laboratory of Reproductive Medicine, Shandong Province, China
| | - Zi-Jiang Chen
- Center for Reproductive Medicine, Provincial Hospital Affiliated to Shandong University, Jinan, 250021, China, , Key Laboratory of Reproductive Medicine, Shandong Province, China
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Porcu E, Bazzocchi A, Notarangelo L, Paradisi R, Landolfo C, Venturoli S. Human oocyte cryopreservation in infertility and oncology. Curr Opin Endocrinol Diabetes Obes 2008; 15:529-35. [PMID: 18971682 DOI: 10.1097/med.0b013e3283199129] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE OF REVIEW To evaluate the present state of research and clinical application of human oocyte cryopreservation in infertility and oncology. RECENT FINDINGS Recent literature documents have an increasing interest in cryopreserving human eggs. A number of studies report on different freezing protocols and various types of clinical application. Increasing attention is paid to vitrification as an alternative to slow cooling for oocyte cryopreservation. Several studies cover the modification of meiotic spindle during cryopreservation in order to assess the less damaging cryopreservation system. The first births with cryopreserved oocytes in cancer patients are reported. SUMMARY Egg freezing may circumvent the ethical and legal concerns regarding embryo cryopreservation, increase assisted reproduction flexibility and be a concrete option to save fertility in women with cancer. Recently, egg survival and pregnancy rates improved, with the birth of more than 500 children. The birth rate per thawed oocyte is around 5-6%. As regards safety, data on birth defects seems to be reassuring so far but must be monitored by an international registry. Comparative studies between slow freezing and vitrification in the same patient population are needed to elucidate pros and cons of each technique.
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Affiliation(s)
- Eleonora Porcu
- Infertility and ART Center, S. Orsola-Malpighi University Hospital, University of Bologna, Bologna, Italy.
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Parmegiani L, Fabbri R, Cognigni GE, Bernardi S, Pocognoli P, Filicori M. Blastocyst formation, pregnancy, and birth derived from human oocytes cryopreserved for 5 years. Fertil Steril 2008; 90:2014.e7-10. [DOI: 10.1016/j.fertnstert.2008.01.106] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2008] [Revised: 01/28/2008] [Accepted: 01/31/2008] [Indexed: 10/22/2022]
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