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Zalazar L, Nicolli AR, López AV, Radonic JM, Cesari A. Seasonal seminal quality variations and vitrification prospects in black flounder Paralichthys orbignyanus. Theriogenology 2024; 229:30-40. [PMID: 39146671 DOI: 10.1016/j.theriogenology.2024.08.008] [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: 09/08/2023] [Revised: 08/06/2024] [Accepted: 08/08/2024] [Indexed: 08/17/2024]
Abstract
Long-term preservation of gametes has been identified as a tool to improve broodstock management and increase the number of juveniles produced by artificial fertilization. Paralichthys orbignyanus is an important commercial and recreational species distributed in marine and estuarine waters from Rio de Janeiro (Brazil) to the San Matías Gulf (Argentina). This work focused on studying the seminal quality of tank-reared P. orbignyanus, demonstrating that males are fluent year-round, with the highest yields at the early reproductive season. Fresh sperm exhibited good forward swimming, and samples could be refrigerated up to 48 h while retaining their motility after activation. The optimal conditions for P. orbignyanus sperm motility activation were established as 950 mOsmol/Kg and pH values between 7 and 7.9. Additionally, a well-defined protocol for semen vitrification was developed to assess the cryotolerance of this species' sperm. We successfully produced high-quality sperm samples, using two vitrification formulations containing trehalose and both z-1000 and x-1000 polymers, that can be used in a near-future in vitro embryo production program.
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Affiliation(s)
- L Zalazar
- Instituto de Investigaciones Biológicas, FCEyN-UNMdP, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Mar del Plata, Argentina
| | - A R Nicolli
- Instituto de Investigaciones Biológicas, FCEyN-UNMdP, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Mar del Plata, Argentina
| | - A V López
- Estación Experimental de Maricultura, Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP), Mar del Plata, Argentina
| | - J M Radonic
- Estación Experimental de Maricultura, Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP), Mar del Plata, Argentina
| | - A Cesari
- Instituto de Investigaciones Biológicas, FCEyN-UNMdP, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Mar del Plata, Argentina.
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Bergin K, Borenzweig W, Roger S, Slifkin R, Baird M, Lee J, Copperman AB, Buyuk E. Effect of postthaw change in embryo score on single euploid embryo transfer success rates. Fertil Steril 2024; 122:288-296. [PMID: 38580183 DOI: 10.1016/j.fertnstert.2024.03.020] [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: 09/29/2023] [Revised: 03/19/2024] [Accepted: 03/20/2024] [Indexed: 04/07/2024]
Abstract
OBJECTIVE To assess whether the change in embryo morphology from precryopreservation to postthaw is associated with the embryo transfer success rates in single euploid embryo transfer cycles. DESIGN Retrospective cohort study. SETTING Academic affiliated fertility clinic. PATIENT(S) Patients who underwent a single euploid embryo transfer cycle from September 2016 to April 2022 were included. A decision support tool was used to assign each embryo a reproductive potential score on the basis of the day of biopsy, expansion, and grade of trophectoderm and inner cell mass at the time of cryopreservation and after thaw. Embryos were divided into 4 groups: group 1 included embryos with the same score after thaw (reference); group 2 included those with a higher score; group 3 included those with a lower score; and group 4 included those that did not re-expand after thaw. INTERVENTION(S) No interventions administered. MAIN OUTCOME MEASURE(S) The primary outcome was the live birth rates (LBRs) per embryo transfer. The secondary outcomes included the chemical pregnancy, clinical pregnancy, and clinical pregnancy loss rates. Comparative statistics and univariate analyses were performed using the Kruskal-Wallis and χ2tests. Multivariate logistic regression fitted with generalized estimating equation was performed to compare the odds of live birth between groups. RESULT(S) A total of 7,750 embryo transfers performed for 4,613 patients met inclusion criteria: 5,331 in group 1; 486 in group 2; 1,726 in group 3; and 207 in group 4. In the univariate analysis, there was a statistically significant difference in the LBR between groups 1, 2, 3, and 4 (55.8% vs. 51.4%, 47.5%, and 26.6%). Logistic regression controlling for oocyte age, antimüllerian hormone, body mass index, endometrial thickness, year of embryo transfer, time from thaw to final grading, and embryo score before cryopreservation showed significantly lower odds of live birth when the embryo was downgraded (odds ratio [OR], 0.70; confidence interval [CI], 0.62-0.79) or did not re-expand (OR, 0.36; CI, 0.26-0.51) than those with no change in score. When controlling for all variables, there was a significant increase in the odds of live birth between embryos that had a higher score after thaw and those without a change (OR, 1.42; CI, 1.14-1.76). There was no significant difference in the clinical pregnancy loss rate among the 4 groups. CONCLUSION(S) The change in the quality of the embryo after thaw is an important factor in embryo transfer success. In an adjusted analysis, the chemical and clinical pregnancy rates and LBR per embryo transfer all significantly decrease in embryos that were downgraded or did not expand on the day of single euploid embryo transfer. Embryos that re-expand and have improved quality after thaw have the highest odds of live birth.
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Affiliation(s)
- Keri Bergin
- Reproductive Medicine Associates of New York, New York, New York; Division of Reproductive Endocrinology & Infertility, Department of Obstetrics & Gynecology, Icahn School of Medicine at Mount Sinai, New York, New York.
| | - William Borenzweig
- Division of Reproductive Endocrinology & Infertility, Department of Obstetrics & Gynecology, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Sarah Roger
- Division of Reproductive Endocrinology & Infertility, Department of Obstetrics & Gynecology, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Richard Slifkin
- Reproductive Medicine Associates of New York, New York, New York
| | - Morgan Baird
- Reproductive Medicine Associates of New York, New York, New York
| | - Joseph Lee
- Reproductive Medicine Associates of New York, New York, New York
| | - Alan B Copperman
- Reproductive Medicine Associates of New York, New York, New York; Division of Reproductive Endocrinology & Infertility, Department of Obstetrics & Gynecology, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Erkan Buyuk
- Reproductive Medicine Associates of New York, New York, New York; Division of Reproductive Endocrinology & Infertility, Department of Obstetrics & Gynecology, Icahn School of Medicine at Mount Sinai, New York, New York
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Wang J, Fan W, Liu B, Pu N, Wu H, Xue R, Li S, Song Z, Tao Y. Encapsulated cell technology: Delivering cytokines to treat posterior ocular diseases. Pharmacol Res 2024; 203:107159. [PMID: 38554790 DOI: 10.1016/j.phrs.2024.107159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/31/2023] [Revised: 03/14/2024] [Accepted: 03/24/2024] [Indexed: 04/02/2024]
Abstract
Encapsulated cell technology (ECT) is a targeted delivery method that uses the genetically engineered cells in semipermeable polymer capsules to deliver cytokines. Thus far, ECT has been extensively utilized in pharmacologic research, and shows enormous potentials in the treatment of posterior segment diseases. Due to the biological barriers within the eyeball, it is difficult to attain effective therapeutic concentration in the posterior segment through topical administration of drug molecules. Encouragingly, therapeutic cytokines provided by ECT can cross these biological barriers and achieve sustained release at the desired location. The encapsulation system uses permeable materials that allow growth factors and cytokines to diffuse efficiently into retinal tissue. Moreover, the ECT based treatment can be terminated timely when we need to retrieve the implant, which makes the therapy reversible and provides a safer alternative for intraocular gene therapy. Meanwhile, we also place special emphasis on optimizing encapsulation materials and enhancing preservation techniques to achieve the stable release of growth factors and cytokines in the eyeball. This technology holds great promise for the treatment of patients with dry AMD, RP, glaucoma and MacTel. These findings would enrich our understandings of ECT and promote its future applications in treatment of degenerative retinopathy. This review comprises articles evaluating the exactness of artificial intelligence-based formulas published from 2000 to March 2024. The papers were identified by a literature search of various databases (PubMed/MEDLINE, Google Scholar, Cochrane Library and Web of Science).
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Affiliation(s)
- Jiale Wang
- Department of Ophthalmology, Henan Eye Hospital, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou 450003, China; College of Medicine, Zhengzhou University, Zhengzhou 450001, China
| | - Wenhui Fan
- Department of Ophthalmology, Henan Eye Hospital, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou 450003, China; College of Medicine, Zhengzhou University, Zhengzhou 450001, China
| | - Bo Liu
- Department of Ophthalmology, Henan Eye Hospital, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou 450003, China; College of Medicine, Zhengzhou University, Zhengzhou 450001, China
| | - Ning Pu
- Department of Ophthalmology, Henan Eye Hospital, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou 450003, China; College of Medicine, Zhengzhou University, Zhengzhou 450001, China
| | - Hao Wu
- Department of Ophthalmology, Henan Eye Hospital, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou 450003, China; College of Medicine, Zhengzhou University, Zhengzhou 450001, China
| | - Rongyue Xue
- Department of Ophthalmology, Henan Eye Hospital, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou 450003, China; College of Medicine, Zhengzhou University, Zhengzhou 450001, China
| | - Siyu Li
- College of Medicine, Zhengzhou University, Zhengzhou 450001, China
| | - Zongming Song
- Department of Ophthalmology, Henan Eye Hospital, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou 450003, China; Eye Research institute, Henan Academy of Medical Sciences, China.
| | - Ye Tao
- Department of Ophthalmology, Henan Eye Hospital, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou 450003, China; College of Medicine, Zhengzhou University, Zhengzhou 450001, China; Eye Research institute, Henan Academy of Medical Sciences, China.
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Campos S, Troncoso J, Paredes E. Ultrastructural examination of cryodamage in Paracentrotus lividus eggs during cryopreservation. Sci Rep 2024; 14:8691. [PMID: 38622199 PMCID: PMC11018813 DOI: 10.1038/s41598-024-57905-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Accepted: 03/22/2024] [Indexed: 04/17/2024] Open
Abstract
This study examinates the challenges of cryopreserving sea urchin (Paracentrotus lividus) eggs, a task hindered by factors like low membrane permeability and high sensitivity to cryoprotective agents (CPAs). While successful cryopreservation has been achieved for some marine invertebrates, eggs remain problematic due to their unique characteristics. The study explores the impact of various CPAs and cryopreservation techniques on sea urchin eggs, employing scanning and transmission electron microscopy to analyze cellular damage. The findings reveal that exposure to low CPA concentrations (0.5 M) did not induce significant damage to eggs. However, high concentrations (3 M) proved highly detrimental. Every cryopreservation approach investigated in this study resulted in irreversible damage to the sea urchin eggs, rendering them nonviable for future use. The research sheds light on the importance of understanding the structural alterations induced by CPAs and cryopreservation methods. This knowledge is essential for refining cryopreservation methods, potentially paving the way for successful preservation of these challenging cells.
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Affiliation(s)
- S Campos
- Centro de Investigación Mariña (CIM), Departamento de Ecoloxía e Bioloxía Animal, Grupo ECOCOST, Universidade de Vigo, 36208, Pontevedra, Spain
| | - J Troncoso
- Centro de Investigación Mariña (CIM), Departamento de Ecoloxía e Bioloxía Animal, Grupo ECOCOST, Universidade de Vigo, 36208, Pontevedra, Spain
| | - E Paredes
- Centro de Investigación Mariña (CIM), Departamento de Ecoloxía e Bioloxía Animal, Grupo ECOCOST, Universidade de Vigo, 36208, Pontevedra, Spain.
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Zeng Z, Li J, Wang X, Yi S, Bi Y, Mo D, Liu B, Fu X, Yang Y, Ma W. Influence of maternal obesity on embryonic vitrification injury and subsequent pregnancy outcomes: A retrospective cohort study. Heliyon 2023; 9:e20095. [PMID: 37809804 PMCID: PMC10559855 DOI: 10.1016/j.heliyon.2023.e20095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 09/11/2023] [Accepted: 09/12/2023] [Indexed: 10/10/2023] Open
Abstract
Background We previously reported that obese mice had significantly high lipid content in embryos, and excessive lipids are detrimental to embryonic development. However, whether maternal obesity has an effect on embryonic vitrification injury and subsequent pregnancy outcomes is still controversial. This study was conducted to clarify the influence of maternal obesity on embryonic vitrification injury and subsequent pregnancy outcomes by in vitro fertilization/intracytoplasmic sperm injection (IVF/ICSI). Methods We retrospectively collected medical record of IVF/ICSI patients from reproductive medicine centers in two tertiary hospitals. The patients were classified into a low-weight group (<18.5 kg/m2), normal-weight group (18.5-23.9 kg/m2), overweight group (24.0-27.9 kg/m2) and obese group (≥28.0 kg/m2) according to their body mass index (BMI). Multivariable logistic regression analysis was performed to compare pregnancy outcomes in fresh and frozen embryo transfer among different BMI groups to define the correlation between BMI and embryonic vitrification injury. Results A total of 44 773 women among 20-40 years old were recruited in this study, of which 27 797 underwent their first fresh embryo transfer and 16 976 underwent their first frozen embryo transfer. For fresh embryo transfer, there was no significant difference in the clinical pregnancy rate, live birth rate, and miscarriage rate of 4 BMI groups. For frozen-thawed embryo transfer, there was a significant increase in the clinical pregnancy rate of the overweight group (AOR = 1.14, 95% CI: 1.05-1.25) and the obese group (AOR = 1.24, 95% CI: 1.03-1.50), while the miscarriage rate (AOR = 1.42, 95% CI: 1.05-1.92) also showed a significant increase in the obese group compared to the normal-weight group. Conclusion This study provided a new understanding of the effect of maternal obesity on embryonic vitrification injury. Maternal obesity does not worsen the outcome of IVF/ICSI, particularly in the frozen-thawed group.
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Affiliation(s)
- Zhonghong Zeng
- Guangxi Reproductive Medical Center, the First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
- Guangxi Key Laboratory of Immunology and Metabolism for Liver Diseases, Nanning, 530021, China
- Key Laboratory of Early Prevention and Treatment for Regional High Frequency Tumor (Guangxi Medical University), Ministry of Education, Nanning, 530021, China
| | - Jingjing Li
- Reproductive Medicine Center, Liuzhou Municipal Maternity and Child Health Care Hospital, Liuzhou, 545001 China
| | - Xi Wang
- Guangxi Reproductive Medical Center, the First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
- Guangxi Key Laboratory of Immunology and Metabolism for Liver Diseases, Nanning, 530021, China
- Key Laboratory of Early Prevention and Treatment for Regional High Frequency Tumor (Guangxi Medical University), Ministry of Education, Nanning, 530021, China
| | - Shanjia Yi
- Guangxi Reproductive Medical Center, the First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
- Guangxi Key Laboratory of Immunology and Metabolism for Liver Diseases, Nanning, 530021, China
- Key Laboratory of Early Prevention and Treatment for Regional High Frequency Tumor (Guangxi Medical University), Ministry of Education, Nanning, 530021, China
| | - Yin Bi
- Guangxi Reproductive Medical Center, the First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
- Guangxi Key Laboratory of Immunology and Metabolism for Liver Diseases, Nanning, 530021, China
- Key Laboratory of Early Prevention and Treatment for Regional High Frequency Tumor (Guangxi Medical University), Ministry of Education, Nanning, 530021, China
| | - Dan Mo
- Guangxi Reproductive Medical Center, the First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
- Guangxi Key Laboratory of Immunology and Metabolism for Liver Diseases, Nanning, 530021, China
- Key Laboratory of Early Prevention and Treatment for Regional High Frequency Tumor (Guangxi Medical University), Ministry of Education, Nanning, 530021, China
| | - Bo Liu
- Guangxi Reproductive Medical Center, the First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
| | - Xiaoqian Fu
- Guangxi Reproductive Medical Center, the First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
| | - Yihua Yang
- Guangxi Reproductive Medical Center, the First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
- Guangxi Key Laboratory of Immunology and Metabolism for Liver Diseases, Nanning, 530021, China
- Key Laboratory of Early Prevention and Treatment for Regional High Frequency Tumor (Guangxi Medical University), Ministry of Education, Nanning, 530021, China
| | - Wenhong Ma
- Guangxi Reproductive Medical Center, the First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China
- Reproductive Medicine Center, Nanning Women and Children's Hospital, Nanning, 530011 China
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de Carvalho JVG, Soares ARB, Leão DL, Reis AN, Santos RR, Rodrigues APR, Domingues SFS. Effect of Different Vitrification Techniques on Viability and Apoptotic Index of Domestic Cat Testicular Tissue Cells. Animals (Basel) 2023; 13:2768. [PMID: 37685032 PMCID: PMC10486519 DOI: 10.3390/ani13172768] [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: 06/15/2023] [Revised: 07/28/2023] [Accepted: 07/30/2023] [Indexed: 09/10/2023] Open
Abstract
Vitrification is essential for successful tissue cryopreservation and biobanking in wild cats. This study aimed to compare different methods of vitrification (Ovarian Tissue Cryosystem-OTC, Straws-STW, and Solid Surface vitrification-SSV) for testicular fragment vitrification in tom cats. Testicular fragments were recovered from five adult tom cats and subjected to equilibrium vitrification using different cryovials and methods under the same conditions of vitrification solutions and cryoprotectants. The efficiencies of the methods were evaluated using histological analysis of spermatogonia and Sertoli cell nuclei, seminiferous tubular basement membrane detachment, and the gonadal epithelium shrinkage score scale. Cell viability was assessed using Hoechst PI and Terminal deoxynucleotidyl transferase nick end labeling (TUNEL) assay. The results showed that OTC is an effective vitrification method for maintaining the distinction between spermatogonia and Sertoli cells. OTC was similar to the control for basal membrane detachment parameters (p = 0.05). Epithelial shrinkage was low in the SSV group, which showed the highest percentage of viable cells among the vitrified groups (p = 0.0023). The OTC and SSV vitrification methods were statistically similar in terms of the percentage of TUNEL-positive cells (p = 0.05). Therefore, OTC and SSV provide favorable conditions for maintaining viable cat testicular tissue cells after vitrification.
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Affiliation(s)
- Julyne Vivian Guimarães de Carvalho
- Laboratory of Wild Animal Biotechnology and Medicine, Faculty of Veterinary Medicine, Federal University of Pará, Castanhal 68740-970, Brazil
- Postgraduate Program in Animal Health and Production in the Amazon, Federal Rural University of the Amazon, Belém 66077-830, Brazil
| | - Airton R. B. Soares
- Laboratory of Wild Animal Biotechnology and Medicine, Faculty of Veterinary Medicine, Federal University of Pará, Castanhal 68740-970, Brazil
- Postgraduate Program of Animal Reproduction in Amazon, Institute of Veterinary Medicine, Federal University of Pará, Castanhal 68740-970, Brazil
| | - Danuza L. Leão
- Laboratory of Wild Animal Biotechnology and Medicine, Faculty of Veterinary Medicine, Federal University of Pará, Castanhal 68740-970, Brazil
| | - Adriana N. Reis
- Laboratory of Wild Animal Biotechnology and Medicine, Faculty of Veterinary Medicine, Federal University of Pará, Castanhal 68740-970, Brazil
| | - Regiane R. Santos
- Laboratory of Wild Animal Biotechnology and Medicine, Faculty of Veterinary Medicine, Federal University of Pará, Castanhal 68740-970, Brazil
| | - Ana P. R. Rodrigues
- Laboratory of Manipulation of Oocytes and Preantral Follicles (LAMOFOPA), State University of Ceara, Fortaleza 60714-903, Brazil
| | - Sheyla F. S. Domingues
- Laboratory of Wild Animal Biotechnology and Medicine, Faculty of Veterinary Medicine, Federal University of Pará, Castanhal 68740-970, Brazil
- Postgraduate Program in Animal Health and Production in the Amazon, Federal Rural University of the Amazon, Belém 66077-830, Brazil
- Postgraduate Program of Animal Reproduction in Amazon, Institute of Veterinary Medicine, Federal University of Pará, Castanhal 68740-970, Brazil
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Development of a Cryopreservation Technique for Xenogeneic Kidney Grafts: Evaluation Using a Mouse Model. J Clin Med 2022; 11:jcm11237237. [PMID: 36498811 PMCID: PMC9737507 DOI: 10.3390/jcm11237237] [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: 10/25/2022] [Revised: 11/25/2022] [Accepted: 12/05/2022] [Indexed: 12/12/2022] Open
Abstract
To align the xeno-metanephros and renal progenitor cell timing for transplantation treatments, cryopreservation techniques and an efficient transportation of regenerated renal products such as xeno-metanephroi and renal progenitor cells should be established. Therefore, we propose a novel method of xenogeneic regenerative medicine for patients with chronic kidney disease by grafting porcine fetal kidneys injected with human renal progenitor cells. To develop a useful cryopreserve system of porcine fetal kidney and human renal progenitor cells, we examined the cryopreservation of a fetal kidney implanted with renal progenitor cells in a mouse model. First, we developed a new method for direct cell injection under the capsule of the metanephros using gelatin as a support for unzipped fetal kidneys. Then, we confirmed in vitro that the nephrons derived from the transplanted cells were regenerated even after cryopreservation before and after cell transplantation. Furthermore, the cryopreserved chimeric metanephroi grew, and regenerated nephrons were observed in NOD. We confirmed that even in cryopreserved chimeric metanephroi, transplanted cell-derived nephrons as well as fresh transplants grew.
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Testicular Tissue Vitrification: a Promising Strategy for Male Fertility Preservation. Reprod Sci 2022; 30:1687-1700. [DOI: 10.1007/s43032-022-01113-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Accepted: 09/16/2022] [Indexed: 11/24/2022]
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Jaiswal AN, Vagga A. Cryopreservation: A Review Article. Cureus 2022; 14:e31564. [DOI: 10.7759/cureus.31564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Accepted: 11/16/2022] [Indexed: 11/17/2022] Open
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Wakayama S, Soejima M, Kikuchi Y, Hayashi E, Ushigome N, Hasegawa A, Mochida K, Suzuki T, Yamazaki C, Shimazu T, Sano H, Umehara M, Matsunari H, Ogura A, Nagashima H, Wakayama T. Development of a new device for manipulating frozen mouse 2-cell embryos on the International Space Station. PLoS One 2022; 17:e0270781. [PMID: 36206235 PMCID: PMC9543944 DOI: 10.1371/journal.pone.0270781] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 09/21/2022] [Indexed: 11/05/2022] Open
Abstract
Whether mammalian embryos develop normally under microgravity remains to be determined. However, embryos are too small to be handled by inexperienced astronauts who orbit Earth on the International Space Station (ISS). Here we describe the development of a new device that allows astronauts to thaw and culture frozen mouse 2-cell embryos on the ISS without directly contacting the embryos. First, we developed several new devices using a hollow fiber tube that allows thawing embryo without practice and observations of embryonic development. The recovery rate of embryos was over 90%, and its developmental rate to the blastocyst were over 80%. However, the general vitrification method requires liquid nitrogen, which is not available on the ISS. Therefore, we developed another new device, Embryo Thawing and Culturing unit (ETC) employing a high osmolarity vitrification method, which preserves frozen embryos at −80°C for several months. Embryos flushed out of the ETC during thawing and washing were protected using a mesh sheet. Although the recovery rate of embryos after thawing were not high (24%-78%) and embryonic development in ETC could not be observed, thawed embryos formed blastocysts after 4 days of culture (29%-100%) without direct contact. Thus, this ETC could be used for untrained astronauts to thaw and culture frozen embryos on the ISS. In addition, this ETC will be an important advance in fields such as clinical infertility and animal biotechnology when recovery rate of embryos were improved nearly 100%.
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Affiliation(s)
- Sayaka Wakayama
- Advanced Biotechnology Center, University of Yamanashi, Yamanashi, Japan
- Faculty of Life and Environmental Sciences, University of Yamanashi, Yamanashi, Japan
- * E-mail: (SW); (TW)
| | - Mariko Soejima
- Faculty of Life and Environmental Sciences, University of Yamanashi, Yamanashi, Japan
| | - Yasuyuki Kikuchi
- Faculty of Life and Environmental Sciences, University of Yamanashi, Yamanashi, Japan
| | - Erika Hayashi
- Faculty of Life and Environmental Sciences, University of Yamanashi, Yamanashi, Japan
| | - Natsuki Ushigome
- Faculty of Life and Environmental Sciences, University of Yamanashi, Yamanashi, Japan
| | - Ayumi Hasegawa
- RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan
| | - Keiji Mochida
- RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan
| | | | | | - Toru Shimazu
- Space Utilization Promotion Department, Japan Space Forum, Tokyo, Japan
| | - Hiromi Sano
- Japan Manned Space Systems Corporation, Tokyo, Japan
| | - Masumi Umehara
- Advanced Engineering Services Co., Ltd, Tsukuba, Ibaraki, Japan
| | - Hitomi Matsunari
- Laboratory of Developmental Engineering, Department of Life Sciences, School of Agriculture, Meiji University, Kawasaki, Japan
- Meiji University International Institute for Bio-Resource Research (MUIIBR), Kawasaki, Japan
| | - Atsuo Ogura
- RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan
| | - Hiroshi Nagashima
- Laboratory of Developmental Engineering, Department of Life Sciences, School of Agriculture, Meiji University, Kawasaki, Japan
- Meiji University International Institute for Bio-Resource Research (MUIIBR), Kawasaki, Japan
| | - Teruhiko Wakayama
- Advanced Biotechnology Center, University of Yamanashi, Yamanashi, Japan
- Faculty of Life and Environmental Sciences, University of Yamanashi, Yamanashi, Japan
- * E-mail: (SW); (TW)
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Sugishita Y, Meng L, Suzuki-Takahashi Y, Nishimura S, Furuyama S, Uekawa A, Tozawa-Ono A, Migitaka-Igarashi J, Koizumi T, Seino H, Natsuki Y, Kubota M, Koike J, Edashige K, Suzuki N. Quantification of residual cryoprotectants and cytotoxicity in thawed bovine ovarian tissues after slow freezing or vitrification. Hum Reprod 2022; 37:522-533. [PMID: 34928342 DOI: 10.1093/humrep/deab274] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 11/17/2021] [Indexed: 09/27/2023] Open
Abstract
STUDY QUESTION How much residual cryoprotectant remains in thawed/warmed ovarian tissues after slow freezing or vitrification? SUMMARY ANSWER After thawing/warming, at least 60 min of diffusion washing in media was necessary to significantly reduce the residual cryoprotectants in ovarian tissues frozen by slow freezing or vitrification. WHAT IS KNOWN ALREADY Ovarian tissue cryopreservation (OTC) by slow freezing has been the conventional method; while the vitrification method has gained popularity for its practicality. The main concern about vitrification is how much potentially toxic residual cryoprotectant remains in the warmed tissues at the time of transplantation. STUDY DESIGN, SIZE, DURATION This was an animal study using the ovarian tissues from 20 bovine ovaries. The duration of this study was from 2018 to 2020. PARTICIPANTS/MATERIALS, SETTING, METHODS Ovarian cortex tissues were prepared from 20 bovine ovaries and assigned randomly to groups of fresh (non-frozen) control, slow freezing with 1.5 M dimethyl sulfoxide (DMSO), 1.5 M 1,2-propanediol (PROH) and vitrification with 35% ethylene glycol (EG). The residual cryoprotectant concentrations in thawed/warmed tissues were measured by gas chromatography at the following time points: frozen (before thawing/warming), 0 min (immediately after thawing/warming), 30, 60 and 120 min after diffusion washing in media. Next, the ultrastructural changes of primordial follicles, granulosa cells, organelles and stromal cells in the ovarian tissues (1 mm × 1 mm × 1 mm) were examined in fresh (non-frozen) control, slow freezing with DMSO or PROH and vitrification with EG groups. Real-time quantitative PCR was carried out to examine the expressions of poly (ADP-ribose) polymerase-1 (PARP1), a DNA damage sensor and caspase-3 (CASP3), an apoptosis precursor, in thawed/warmed ovarian tissues that were washed for either 0 or 120 min and subsequently in tissues that were ex vivo cultured for 24 or 48 h. The same set of tissues were also used to analyze the protein expressions of gamma H2A histone family member X (γH2AX) for DNA double-strand breaks and activated caspase-3 (AC3) for apoptosis by immunohistochemistry. MAIN RESULTS AND THE ROLE OF CHANCE The residual cryoprotectant concentrations decreased with the extension of diffusion washing time. After 60 min washing, the differences of residual cryoprotectant between DMSO, PROH and EG were negligible (P > 0.05). This washing did not affect the tissue integrity or significantly elevate the percentage of AC3 and γH2AX positive cells, indicating that tissues are safe and of good quality for transplantation. LARGE SCALE DATA N/A. LIMITATIONS, REASONS FOR CAUTION Since the study was performed with ovarian tissues from bovines, generalizability to humans may be limited. Potential changes in ovarian tissue beyond 120 min were not investigated. WIDER IMPLICATIONS OF THE FINDINGS This study addresses concerns about the cytotoxicity of EG in warmed ovarian tissues and could provide insights when devising a standard vitrification protocol for OTC. STUDY FUNDING/COMPETING INTEREST(S) The study was funded by a Grant-in-Aid for Scientific Research (B) from the Japan Society for the Promotion of Science to N.S.
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Affiliation(s)
- Yodo Sugishita
- Department of Obstetrics and Gynecology, St. Marianna University, School of Medicine, Kawasaki, Kanagawa, Japan
- Department of Frontier Medicine, Institute of Medical Science, St. Marianna University, School of Medicine, Kawasaki, Kanagawa, Japan
| | - Lingbo Meng
- Department of Obstetrics and Gynecology, St. Marianna University, School of Medicine, Kawasaki, Kanagawa, Japan
| | - Yuki Suzuki-Takahashi
- Department of Obstetrics and Gynecology, St. Marianna University, School of Medicine, Kawasaki, Kanagawa, Japan
| | - Sandy Nishimura
- Department of Obstetrics and Gynecology, St. Marianna University, School of Medicine, Kawasaki, Kanagawa, Japan
| | - Sayako Furuyama
- Department of Obstetrics and Gynecology, St. Marianna University, School of Medicine, Kawasaki, Kanagawa, Japan
| | - Atsushi Uekawa
- Department of Obstetrics and Gynecology, St. Marianna University, School of Medicine, Kawasaki, Kanagawa, Japan
| | - Akiko Tozawa-Ono
- Department of Obstetrics and Gynecology, St. Marianna University, School of Medicine, Kawasaki, Kanagawa, Japan
| | - Junko Migitaka-Igarashi
- Department of Anatomy, St. Marianna University, School of Medicine, Kawasaki, Kanagawa, Japan
| | - Tomoe Koizumi
- Department of Obstetrics and Gynecology, St. Marianna University, School of Medicine, Kawasaki, Kanagawa, Japan
- Center for Reproductive Medicine, Dokkyo Medical University, Saitama Medical Center, Koshigaya, Saitama, Japan
| | - Hibiki Seino
- Department of Pathology, St. Marianna University, School of Medicine, Kawasaki, Kanagawa, Japan
| | - Yasunori Natsuki
- Graduate School Facility of Electron Microscope Research, St. Marianna University, School of Medicine, Kawasaki, Kanagawa, Japan
| | - Manabu Kubota
- Department of Pathology, St. Marianna University, School of Medicine, Kawasaki, Kanagawa, Japan
| | - Junki Koike
- Department of Anatomy, St. Marianna University, School of Medicine, Kawasaki, Kanagawa, Japan
| | - Keisuke Edashige
- Faculty of Agriculture and Marine Science, Department of Agricultural Chemistry, Kochi University, Nankoku, Kochi, Japan
| | - Nao Suzuki
- Department of Obstetrics and Gynecology, St. Marianna University, School of Medicine, Kawasaki, Kanagawa, Japan
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Hayashi E, Wakayama S, Ito D, Hasegawa A, Mochida K, Ooga M, Ogura A, Wakayama T. Mouse in vivo-derived late 2-cell embryos have higher developmental competence after high osmolality vitrification and -80°C preservation than IVF or ICSI embryos. J Reprod Dev 2022; 68:118-124. [PMID: 34980785 PMCID: PMC8979799 DOI: 10.1262/jrd.2021-115] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Mammalian embryos are most commonly cryopreserved in liquid nitrogen; however, liquid nitrogen is not available in special environments, such as the International Space Station (ISS), and
vitrified embryos must be stored at −80°C. Recently, the high osmolarity vitrification (HOV) method was developed to cryopreserve mouse 2-cell stage embryos at −80°C; however, the
appropriate embryo is currently unknown. In this study, we compared the vitrification resistance of in vivo-derived, in vitro fertilization (IVF)-derived,
and intracytoplasmic sperm injection (ICSI)-derived mouse 2-cell embryos against cryopreservation at −80°C. The ICSI embryos had lower survival rates after warming and significantly lower
developmental rates than the in vivo and IVF embryos. Further, IVF embryos had a lower survival rate after warming, but a similar rate to the in vivo
embryos to full-term development. This result was confirmed by simultaneous vitrification of in vivo and IVF embryos in the same cryotube using identifiable green
fluorescent protein-expressing embryos. We also evaluated the collection timing of the in vivo embryos from the oviduct and found that late 2-cell embryos had higher
survival and developmental rates to full-term than early 2-cell embryos. Some early 2-cell embryos remained in the S-phase, whereas most late 2-cell embryos were in the G2-phase, which may
have affected the tolerance to embryo vitrification. In conclusion, when embryos must be cryopreserved under restricted conditions, such as the ISS, in vivo fertilized
embryos collected at the late 2-cell stage without long culture should be employed.
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Affiliation(s)
- Erika Hayashi
- Faculty of Life and Environmental Science, University of Yamanashi, Kofu, Yamanashi 400-8510, Japan
| | - Sayaka Wakayama
- Advanced Biotechnology Center, University of Yamanashi, Kofu, Yamanashi 400-8510, Japan
| | - Daiyu Ito
- Faculty of Life and Environmental Science, University of Yamanashi, Kofu, Yamanashi 400-8510, Japan
| | - Ayumi Hasegawa
- RIKEN BioResource Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Keiji Mochida
- RIKEN BioResource Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Masatoshi Ooga
- Faculty of Life and Environmental Science, University of Yamanashi, Kofu, Yamanashi 400-8510, Japan
| | - Atsuo Ogura
- RIKEN BioResource Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Teruhiko Wakayama
- Faculty of Life and Environmental Science, University of Yamanashi, Kofu, Yamanashi 400-8510, Japan.,Advanced Biotechnology Center, University of Yamanashi, Kofu, Yamanashi 400-8510, Japan
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Angel-Velez D, De Coster T, Azari-Dolatabad N, Fernandez-Montoro A, Benedetti C, Bogado Pascottini O, Woelders H, Van Soom A, Smits K. New Alternative Mixtures of Cryoprotectants for Equine Immature Oocyte Vitrification. Animals (Basel) 2021; 11:ani11113077. [PMID: 34827809 PMCID: PMC8614364 DOI: 10.3390/ani11113077] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 10/22/2021] [Accepted: 10/26/2021] [Indexed: 11/16/2022] Open
Abstract
Simple Summary Oocyte cryopreservation allows female gametes to be conserved for long periods, which would be of benefit for mares of high genetic merit, but its efficiency is not satisfactory yet. Therefore, the aim of this study was to optimize a vitrification protocol for equine oocytes using a systematic approach. We performed a side-by-side comparison of different cryoprotective agents (CPAs) during the vitrification and warming of equine oocytes. In the first experiment, a fixed mixture of CPAs that enter the oocyte was used, and three sugars were compared, which cannot penetrate the oocyte but provide protection through an osmotic effect. In the second experiment, one sugar from the first experiment was selected to compare three mixtures of CPAs that enter the oocyte. Overall, the embryo development was reduced after oocyte cryopreservation when compared to fresh oocytes. Yet, we were able to produce embryos with all six cryoprotective agent mixtures, and we identified one promising combination of cryoprotectants, consisting of propylene glycol, ethylene glycol, and galactose, that resulted in blastocyst rates in the same range as the fresh control group. Abstract Equine oocyte vitrification would benefit the growing in vitro embryo production programs, but further optimization of the protocol is necessary to reach clinical efficiency. Therefore, we aimed to perform a direct comparison of non-permeating and permeating cryoprotective agents (CPAs) during the vitrification and warming of equine immature oocytes. In the first experiment, cumulus oocytes complexes (COCs) were vitrified comparing sucrose, trehalose, and galactose in combination with ethylene glycol (EG) and dimethyl sulfoxide (DMSO). In the second experiment, the COCs were vitrified using three mixtures of permeating CPAs in a 50:50 volume ratio (ethylene glycol-dimethyl sulfoxide (ED), propylene glycol-ethylene glycol (PE), and propylene glycol-dimethyl sulfoxide (PD)) with galactose and warmed in different galactose concentrations (0.3 or 0.5 mol/L). Overall, all the treatments supported blastocyst formation, but the developmental rates were lower for all the vitrified groups in the first (4.3 to 7.6%) and the second (3.5 to 9.4%) experiment compared to the control (26.5 and 34.2%, respectively; p < 0.01). In the first experiment, the maturation was not affected by vitrification. The sucrose exhibited lower cleavage than the control (p = 0.02). Although the galactose tended to have lower maturation than trehalose (p = 0.060) and control (p = 0.069), the highest numerical cleavage and blastocyst rates were obtained with this CPA. In the second experiment, the maturation, cleavage, and blastocyst rates were similar between the treatments. Compared to the control, only the ED reached similar maturation (p = 0.02) and PE similar cleavage (p = 0.1). The galactose concentration during warming did not affect the maturation, cleavage, or blastocyst rates (p > 0.1), but the PE-0.3 exhibited the highest blastocyst rate (15.1%) among the treatments, being the only one comparable to the control (34.2%). As such, PE–galactose provides a valuable option for equine immature oocyte vitrification and should be considered for the future optimization of the protocol.
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Affiliation(s)
- Daniel Angel-Velez
- Department of Reproduction, Obstetrics and Herd Health, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium; (T.D.C.); (N.A.-D.); (A.F.-M.); (C.B.); (O.B.P.); (A.V.S.); (K.S.)
- Research Group in Animal Sciences—INCA-CES, Universidad CES, Medellin 050021, Colombia
- Correspondence: or ; Tel.: +32-4-5614-4543
| | - Tine De Coster
- Department of Reproduction, Obstetrics and Herd Health, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium; (T.D.C.); (N.A.-D.); (A.F.-M.); (C.B.); (O.B.P.); (A.V.S.); (K.S.)
| | - Nima Azari-Dolatabad
- Department of Reproduction, Obstetrics and Herd Health, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium; (T.D.C.); (N.A.-D.); (A.F.-M.); (C.B.); (O.B.P.); (A.V.S.); (K.S.)
| | - Andrea Fernandez-Montoro
- Department of Reproduction, Obstetrics and Herd Health, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium; (T.D.C.); (N.A.-D.); (A.F.-M.); (C.B.); (O.B.P.); (A.V.S.); (K.S.)
| | - Camilla Benedetti
- Department of Reproduction, Obstetrics and Herd Health, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium; (T.D.C.); (N.A.-D.); (A.F.-M.); (C.B.); (O.B.P.); (A.V.S.); (K.S.)
| | - Osvaldo Bogado Pascottini
- Department of Reproduction, Obstetrics and Herd Health, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium; (T.D.C.); (N.A.-D.); (A.F.-M.); (C.B.); (O.B.P.); (A.V.S.); (K.S.)
- Veterinary Physiology and Biochemistry, Department of Veterinary Sciences, University of Antwerp, 2610 Wilrijk, Belgium
| | - Henri Woelders
- Wageningen Livestock Research, Wageningen University and Research, Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands;
| | - Ann Van Soom
- Department of Reproduction, Obstetrics and Herd Health, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium; (T.D.C.); (N.A.-D.); (A.F.-M.); (C.B.); (O.B.P.); (A.V.S.); (K.S.)
| | - Katrien Smits
- Department of Reproduction, Obstetrics and Herd Health, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium; (T.D.C.); (N.A.-D.); (A.F.-M.); (C.B.); (O.B.P.); (A.V.S.); (K.S.)
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Abstract
Male infertility is responsible for 50% of men's health problems and has always been a concern for personal and social issues. A survey of global statistics suggests an increase in infertility rate as one of the critical issues documented in studies. There are different ways of maintaining fertility in men, depending on their age. In this paper, we review the preservation methods used for fertility treatment in Iran and other countries. Available data were reviewed from Google Scholar, PubMed, Scopus, Web of Science, IranMedex, MEDLIB, IranDoc and Scientific Information Database and searched for articles published up to 2018, using the medical subject heading (MeSH) terms for cryopreservation, sperm, testicular, spermatogonia stem cell, male infertility and/or Iranian and in the world, to provide evidence from evaluation of fertility preservation the methods. Based the search strategy, 274 manuscripts were found. After reviewing the titles, abstracts and manuscripts in their entirety, 119 articles were obtained and selected according to the eligibility criteria. The 85 studies mentioned above were divided into three categories (sperm, testis, and spermatogonia stem cells (SSCs)), and methods of fertility preservation were investigated. Ways to maintain male fertility were different depending on age, and included sperm, testicular, and SSC freezing. The number of studies on testicular tissue and SSCs was low for human samples, and more studies are still needed. Sperm freezing at infertility centres is the top for male fertility preservation.
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Embryology outcomes after oocyte vitrification with super-cooled slush nitrogen are similar to outcomes with conventional liquid nitrogen: a randomized controlled trial. Fertil Steril 2021; 117:106-114. [PMID: 34654569 DOI: 10.1016/j.fertnstert.2021.08.043] [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: 04/14/2021] [Revised: 08/23/2021] [Accepted: 08/25/2021] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To determine whether the use of slush nitrogen (SN), a super-cooled form of nitrogen with a temperature from -207 to -210 °C, can improve oocyte survival after vitrification and warming compared with conventional liquid nitrogen (LN). DESIGN Randomized controlled trial. SETTING Academic-affiliated private practice. PATIENT(S) A total of 556 metaphase II oocytes from 32 oocyte donor cycles were included. INTERVENTION(S) Donor oocytes were block randomized to undergo vitrification with either SN or LN. Vitrification was followed by warming, fertilization with donor sperm, embryo culture to the blastocyst stage, and preimplantation genetic testing for aneuploidy via trophectoderm biopsy with targeted next-generation sequencing. MAIN OUTCOME MEASURE(S) The primary outcome was oocyte survival after vitrification and warming. Secondary outcomes included rates of fertilization, usable blastocyst formation, and whole chromosome aneuploidy. RESULT(S) Half of the metaphase II oocytes (n = 278) were randomized to undergo vitrification with SN, whereas the other half (n = 278) were randomized to undergo vitrification with LN. There were no statistically significant differences noted in oocyte survival rate (85.3% vs. 86.3%), fertilization rate (84.0% vs. 80.0%), rate of usable blastocyst formation (54.3% vs. 55.7%), or rate of whole chromosome aneuploidy (9.4% vs. 11.7%) between the SN and LN arms, respectively. CONCLUSION(S) The implementation of an SN oocyte vitrification protocol resulted in similar embryology outcomes compared with LN. The use of SN did not lead to any demonstrable improvement in oocyte survival after vitrification and warming. CLINICAL TRIAL REGISTRATION NUMBER NCT04342364.
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16
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Cryopreservation of Gametes and Embryos and Their Molecular Changes. Int J Mol Sci 2021; 22:ijms221910864. [PMID: 34639209 PMCID: PMC8509660 DOI: 10.3390/ijms221910864] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 08/18/2021] [Accepted: 10/01/2021] [Indexed: 11/16/2022] Open
Abstract
The process of freezing cells or tissues and depositing them in liquid nitrogen at -196 °C is called cryopreservation. Sub-zero temperature is not a physiological condition for cells and water ice crystals represent the main problem since they induce cell death, principally in large cells like oocytes, which have a meiotic spindle that degenerates during this process. Significantly, cryopreservation represents an option for fertility preservation in patients who develop gonadal failure for any condition and those who want to freeze their germ cells for later use. The possibility of freezing sperm, oocytes, and embryos has been available for a long time, and in 1983 the first birth with thawed oocytes was achieved. From the mid-2000s forward, the use of egg vitrification through intracytoplasmic sperm injection has improved pregnancy rates. Births using assisted reproductive technologies (ART) have some adverse conditions and events. These risks could be associated with ART procedures or related to infertility. Cryopreservation generates changes in the epigenome of gametes and embryos, given that ART occurs when the epigenome is most vulnerable. Furthermore, cryoprotective agents induce alterations in the integrity of germ cells and embryos. Notably, cryopreservation extensively affects cell viability, generates proteomic profile changes, compromises crucial cellular functions, and alters sperm motility. This technique has been widely employed since the 1980s and there is a lack of knowledge about molecular changes. The emerging view is that molecular changes are associated with cryopreservation, affecting metabolism, cytoarchitecture, calcium homeostasis, epigenetic state, and cell survival, which compromise the fertilization in ART.
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17
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Vitrification with microinjection of single seminiferous tubules: an efficient cryopreservation approach for limited testicular tissue. Reprod Biomed Online 2021; 43:687-699. [PMID: 34556414 DOI: 10.1016/j.rbmo.2021.06.026] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 06/08/2021] [Accepted: 06/28/2021] [Indexed: 11/23/2022]
Abstract
RESEARCH QUESTION Is vitrification with microinjection of single seminiferous tubules an efficient cryopreservation approach for limited testicular tissue? DESIGN Testicular tissue from 10 patients with normal spermatogenesis were assigned to a fresh control group or one of the following cryopreservation procedures: uncontrolled slow freezing (USF) using either 1.5 or 2.1 M DMSO combined with sucrose and vitrification with or without single seminiferous tubules microinjection. RESULTS Single seminiferous tubules microinjected with cryoprotective agents (CPA) enhanced the penetration of CPA compared with CPA-treated testicular tissue fragments. Microinjection of seminiferous tubules (VLP) maintained tubule structural integrity and germ cell numbers, and reduced spermatogonial apoptosis after cryopreservation compared with vitrification without microinjection (apoptosis rate: VLP versus vitrification without microinjection, P = 0.047; VLP versus USF, P= 0.049). Freezing of single seminiferous tubules using 0.25-ml straws and traditional sperm freezing methods protected sperm retrieval and recovery rates, and the progressive motility index. CONCLUSIONS Vitrification of single seminiferous tubule with microinjection of low CPA concentration is an effective approach to testicular cryopreservation.
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Roeca C, Silva E, Barentsen C, Powell TL, Jansson T. Effects of vitrification and the superovulated environment on placental function and fetal growth in an IVF mouse model. Mol Hum Reprod 2021; 26:624-635. [PMID: 32618997 DOI: 10.1093/molehr/gaaa047] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 06/08/2020] [Indexed: 01/15/2023] Open
Abstract
In studies of human IVF, as compared to frozen embryo transfer (ET), fresh ET is associated with smaller infants and higher risk of small for gestational age infants. Recent observations suggest that ET using vitrified embryos is associated with higher pregnancy and live birth rates compared to fresh ET, but increased rates of large for gestational age infants. The mechanisms underlying these associations are largely unknown, and available evidence suggests that the influence of IVF, vitrification and the superovulated (SO) uterine environment on placental function and fetal growth is complex. This warrants further investigation given the prevalent practice in human IVF of both fresh ET into a SO uterine environment, and vitrification with ET into a more physiologic uterine environment. Using a mouse model that closely resembles human IVF, we investigated if vitrification of IVF embryos better preserves placental function and results in better pregnancy outcomes as compared to fresh ET because of transfer into a more physiologic endometrium. We found that the SO environment, independent of vitrification status, reduced implantation rates, inhibited placental mechanistic target of rapamycin signaling and induced placental stress signaling, resulting in fetal growth restriction (1.080 ± 0.05 g estrous fresh (n = 17 litters), 1.176 ± 0.05 g estrous vitrified (n = 12), 0.771 ± 0.06 g SO fresh (n = 15), 0.895 ± 0.08 g SO vitrified (n = 10), P < 0.0001). In addition, our study suggests that vitrification impairs the developmental potential of IVF blastocysts that resulted in a significantly smaller litter size (2.6 ± 2.3 fresh estrous vs 2.5 ± 2.4 fresh SO vs 1.6 ± 1.7 estrous vitrified vs 1.7 ± 1.8 SO vitrified, P = 0.019), with no effect on fetal growth or placental function at term. Our findings suggest that vitrification may negatively impact early embryonic viability, while the SO maternal uterine environment impairs both placental development and fetal growth in IVF.
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Affiliation(s)
- C Roeca
- Department of Obstetrics & Gynecology, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - E Silva
- Department of Obstetrics & Gynecology, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - C Barentsen
- Department of Obstetrics & Gynecology, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - T L Powell
- Department of Pediatrics, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - T Jansson
- Department of Obstetrics & Gynecology, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
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Pruß D, Yang H, Luo X, Liu D, Hegermann J, Wolkers WF, Sieme H, Oldenhof H. high-throughput droplet vitrification of stallion sperm using permeating cryoprotective agents. Cryobiology 2021; 101:67-77. [PMID: 34077709 DOI: 10.1016/j.cryobiol.2021.05.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2020] [Revised: 03/12/2021] [Accepted: 05/18/2021] [Indexed: 01/01/2023]
Abstract
Stallion sperm is typically cryopreserved using low cooling rates and low concentrations of cryoprotective agents (CPAs). The inevitable water-to-ice phase transition during cryopreservation is damaging and can be prevented using vitrification. Vitrification requires high cooling rates and high CPA concentrations. In this study, the feasibility of stallion sperm vitrification was investigated. A dual-syringe pump system was used to mix sperm equilibrated in a solution with a low concentration of CPAs, with a solution containing a high CPA concentration, and to generate droplets of a defined size (i.e., ~20 μL) that were subsequently cooled by depositing on an aluminum alloy block placed in liquid nitrogen. Mathematical modeling was performed to compute the heat transfer and rate of cooling. The minimum CPA concentration needed for vitrification was determined for various CPAs (glycerol, ethylene glycol, propylene glycol, dimethyl sulfoxide) and combinations thereof, while effects of droplet size and carrier solution were also identified. Sperm vitrification was eventually done using a glycerol/propylene glycol (1/1) mixture at a final concentration of 45% in buffered saline supplemented with 3% albumin and polyvinylpyrrolidon, while warming was done in standard diluent supplemented with 100 mM sucrose. The sperm concentration was found to greatly affect sperm membrane integrity after vitrification-and-warming, i.e., was found to be 21 ± 12% for 10 × 106 sperm mL-1 and 54 ± 8% for 1 × 106 sperm mL-1. However, an almost complete loss of sperm motility was observed. In conclusion, successful sperm vitrification requires establishing the narrow balance between droplet size, sperm concentration, CPA type and concentration, and exposure time.
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Affiliation(s)
- David Pruß
- Unit for Reproductive Medicine, Clinic for Horses, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Huaqing Yang
- Unit for Reproductive Medicine, Clinic for Horses, University of Veterinary Medicine Hannover, Hannover, Germany; Biostabilization Laboratory, Lower Saxony Centre for Biomedical Engineering, Implant Research and Development, Hannover, Germany; Institute of Thermodynamics, Leibniz University Hannover, Hannover, Germany
| | - Xing Luo
- Institute of Thermodynamics, Leibniz University Hannover, Hannover, Germany
| | - Dejia Liu
- Unit for Reproductive Medicine, Clinic for Horses, University of Veterinary Medicine Hannover, Hannover, Germany; Biostabilization Laboratory, Lower Saxony Centre for Biomedical Engineering, Implant Research and Development, Hannover, Germany
| | - Jan Hegermann
- Institute of Functional and Applied Anatomy, Research Core Unit Electron Microscopy, Hannover Medical School, Hannover, Germany
| | - Willem F Wolkers
- Unit for Reproductive Medicine, Clinic for Horses, University of Veterinary Medicine Hannover, Hannover, Germany; Biostabilization Laboratory, Lower Saxony Centre for Biomedical Engineering, Implant Research and Development, Hannover, Germany
| | - Harald Sieme
- Unit for Reproductive Medicine, Clinic for Horses, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Harriëtte Oldenhof
- Unit for Reproductive Medicine, Clinic for Horses, University of Veterinary Medicine Hannover, Hannover, Germany.
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Roeca C, Johnson RL, Truong T, Carlson NE, Polotsky AJ. Birth outcomes are superior after transfer of fresh versus frozen embryos for donor oocyte recipients. Hum Reprod 2021; 35:2850-2859. [PMID: 33190157 DOI: 10.1093/humrep/deaa245] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 08/04/2020] [Indexed: 12/18/2022] Open
Abstract
STUDY QUESTION For donor oocyte recipients, are birth outcomes superior for fresh versus frozen embryos? SUMMARY ANSWER Among fresh donor oocyte recipients, fresh embryos are associated with better birth outcomes when compared with frozen embryos. WHAT IS KNOWN ALREADY Frozen embryo transfer (ET) with vitrification has been associated with improved pregnancy rates, but also increased rates of large for gestational age infants. Donor oocyte recipients represent an attractive biological model to attempt to isolate the impact of embryo cryopreservation on IVF outcomes, yet there is a paucity of studies in this population. STUDY DESIGN, SIZE, DURATION A retrospective cohort of the US national registry, the Society for Assisted Reproductive Technology Clinic Outcome Reporting System, of IVF cycles of women using fresh donor oocytes resulting in ET between 2013 and 2015. Thawed oocytes were excluded. PARTICIPANTS/MATERIALS, SETTINGS, METHODS Good obstetric outcome (GBO), defined as a singleton, term, live birth with appropriate for gestational age birth weight, was the primary outcome measure. Secondary outcomes included live birth, clinical pregnancy, spontaneous abortion, preterm birth, multiple births and gestational age-adjusted weight. Outcomes were modeled using the generalized estimating equation approach. MAIN RESULTS AND THE ROLE OF CHANCE Data are from 25 387 donor oocyte cycles, in which 14 289 were fresh and 11 098 were frozen ETs. A GBO was 27% more likely in fresh ETs (26.3%) compared to frozen (20.9%) (adjusted risk ratio 1.27; 95% confidence interval (CI) 1.21-1.35; P < 0.001). Overall, fresh transfer was more likely to result in a live birth (55.7% versus 39.5%; adjusted risk ratio 1.21; 95% CI 1.18-1.26; P < 0.001). Among singleton births, there was no difference in gestational age-adjusted birth weight between groups. LIMITATION, REASONS FOR CAUTION Our cohort findings contrast with data from autologous oocytes. Prospective studies with this population are warranted. WIDER IMPLICATIONS OF THE FINDINGS Among donor oocyte recipients, fresh ETs may be associated with better birth outcomes. Reassuringly, given its prevalent use, modern embryo cryopreservation does not appear to result in phenotypically larger infants. STUDY FUNDING/COMPETING INTEREST(S) None. TRIAL REGISTRATION NUMBER N/A.
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Affiliation(s)
- Cassandra Roeca
- Division of Reproductive Endocrinology and Infertility, Department of OBGYN, University of Colorado School of Medicine, Aurora, CO, USA
| | - Rachel L Johnson
- Department of Biostatistics and Informatics, Colorado School of Public Health, Aurora, CO, USA
| | | | - Nichole E Carlson
- Department of Biostatistics and Informatics, Colorado School of Public Health, Aurora, CO, USA
| | - Alex J Polotsky
- Division of Reproductive Endocrinology and Infertility, Department of OBGYN, University of Colorado School of Medicine, Aurora, CO, USA
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Valdivia M, Bravo Z, Reyes J, Gonzales GF. Rescue and Conservation of Male Adult Alpacas ( Vicugna pacos) Based on Spermatogonial Stem Cell Biotechnology Using Atomized Black Maca as a Supplement of Cryopreservation Medium. Front Vet Sci 2021; 8:597964. [PMID: 33816583 PMCID: PMC8010694 DOI: 10.3389/fvets.2021.597964] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Accepted: 01/18/2021] [Indexed: 12/02/2022] Open
Abstract
This is the first time that testicular tissue (n = 44) and isolated testicular cells (n = 51) were cryopreserved from alpaca testes 24 h postmortem. For this purpose, internally designed freezing media and cryopreservation protocols were used. Testicular tissue fragments (25 mg) and isolated testicular cells were frozen in MTDB (trehalose and black maca), MTD (trehalose), MSDB (sucrose and black maca), and MSD (sucrose) media. Isolated spermatogonial cells were cryopreserved in two ways, before and after proliferation in vitro. After cryopreservation, the percentage of cell viability in Group 1 (>50% of cell viability) by trypan blue did not show differences within each group (p > 0.05) but showed significant differences when comparing fragments with isolated cells (p < 0.05). Spermatogonial stem cells (SSC) were identified by flow cytometry as strong Dolichos biflorus agglutinin (sDBA) and mitochondrial activity of SSC as strongly positive for MitoSense (sMitoSense+) in intact mitochondria cells, weakly positive for MitoSense (wMitoSense+) in early apoptosis, and necrosis with 7-Aminoactinomycin-D positive (7-AAD). After freezing, in Group 1M (≥30% sMitoSense+), the fragments did not show differences between the media (p > 0.05), but in the isolated cells frozen in MSDB medium, 63.68 ± 8.90% (p < 0.05). In Group 2M (<30% sMitoSense+), necrosis (7AAD+) in MSDB medium was 27.03 ± 5.80%, and necrosis in isolated cells was 14.05 ± 9.3% with significant differences between these groups (p < 0.05); in sMitoSense+, the isolated cells (34.40 ± 23%) had a higher percentage than the fragments (12.4 ± 5.2) (p < 0.05). On the other hand, MSDB and MSD media were significantly higher for isolated cells than for fragments in sDBA+ (p < 0.05). On the other hand, the SSC (sDBA+) had significant differences (p < 0.05) between fresh cells 7.43 ± 1.3% (sDBA+) compared with those cryopreserved in MSDB medium 1.46 ± 0.34% (sDBA+). Additionally, the proliferated and cryopreserved SSC 6.29 ± 1.17% (sDBA+) did not show significant differences concerning the fresh cells (p > 0.05). In conclusion, the black maca showed antioxidant properties when it was included in the freezing medium and, therefore, improved the SSC's conservation of the alpaca. Furthermore, the proliferation of isolated cells in vitro produces a higher amount of SSC after thawing them for further preclinical or clinical work.
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Affiliation(s)
- Martha Valdivia
- Laboratory of Reproductive Physiology, Research Institute "Antonio Raimondi," Zoology Department, Biological Sciences Faculty, Universidad Nacional Mayor de San Marcos, Lima, Peru
| | - Zezé Bravo
- Laboratory of Reproductive Physiology, Research Institute "Antonio Raimondi," Zoology Department, Biological Sciences Faculty, Universidad Nacional Mayor de San Marcos, Lima, Peru
| | - Jhakelin Reyes
- Laboratory of Reproductive Physiology, Research Institute "Antonio Raimondi," Zoology Department, Biological Sciences Faculty, Universidad Nacional Mayor de San Marcos, Lima, Peru
| | - Gustavo F Gonzales
- Endocrine and Reproductive Laboratory, Department of Biological and Physiological Science, and Laboratory of Investigation and Development (LID), Faculty of Sciences and Philosophy, Universidad Peruana Cayetano Heredia, Lima, Peru
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Comparison of two culture methods during in vitro spermatogenesis of vitrified-warmed testis tissue: Organ culture vs. hanging drop culture. Cryobiology 2021; 100:142-150. [PMID: 33639111 DOI: 10.1016/j.cryobiol.2021.02.006] [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: 08/31/2020] [Revised: 02/17/2021] [Accepted: 02/18/2021] [Indexed: 12/11/2022]
Abstract
Solid surface vitrification (SSV) is a cost effective and simple method for testis tissue preservation. Vitrified-warmed testis tissue was successfully cultured using various organ culture methods. In this study, we compared two culture methods viz. hanging drop (HD) and organ culture (OC) methods for in vitro spermatogenesis of goat testis tissue vitrified-warmed by SSV. It was observed that OC method was superior (p < 0.05) to HD method in terms of post-warming metabolic activity of testicular tissue, as measured by MTT assay on Day 7 and Day 14 of culture, respectively. The size of the tissue also played an important role in post-warming metabolic activity and viability (4 mm3: 72.7 ± 1.2% vs. 9 mm3: 62.7 ± 1.3% vs. 16 mm3: 40.5 ± 1.7%) of vitrified tissues with smaller tissue resulting in better result. The vitrification-induced ROS activity significantly decreased during their in vitro culture. Histology and scanning electron microscopy (SEM) showed the rupture of basal membrane, surface morphology and, cell loss due to vitrification. However, histology and immunohistochemistry showed the progression of in vitro spermatogenesis and formation of elongated spermatozoa in both fresh and vitrified-warmed testis tissue cultured by OC method. Taken together, our results suggest that OC method is superior to HD method for culturing goat testis tissue vitrified-warmed by SSV.
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Zheng X, Liu J, Liu Z, Wang J. Bio-inspired Ice-controlling Materials for Cryopreservation of Cells and Tissues. ACTA CHIMICA SINICA 2021. [DOI: 10.6023/a21020043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Hossay C, Donnez J, Dolmans MM. Whole Ovary Cryopreservation and Transplantation: A Systematic Review of Challenges and Research Developments in Animal Experiments and Humans. J Clin Med 2020; 9:jcm9103196. [PMID: 33023111 PMCID: PMC7601276 DOI: 10.3390/jcm9103196] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 09/28/2020] [Accepted: 09/30/2020] [Indexed: 12/13/2022] Open
Abstract
Ovarian tissue cryopreservation and transplantation is the only fertility preservation option that enables both restoration of fertility and resumption of ovarian endocrine function, avoiding the morbidity associated with premature menopause. It is also the only technique available to prepubertal patients and those whose treatment cannot be delayed for life-threatening reasons. Ovarian tissue cryopreservation can be carried out in two different ways, either as ovarian cortical fragments or as a whole organ with its vascular pedicle. Although use of cortical strips is the only procedure that has been approved by the American Society for Reproductive Medicine, it is fraught with drawbacks, the major one being serious follicle loss occurring after avascular transplantation due to prolonged warm ischemia. Whole ovary cryopreservation involves vascular transplantation, which could theoretically counteract the latter phenomenon and markedly improve follicle survival. In theory, this technique should maintain endocrine and reproductive functions much longer than grafting of ovarian cortical fragments. However, this procedure includes a number of critical steps related to (A) the level of surgical expertise required to accomplish retrieval of a whole ovary with its vascular pedicle, (B) the choice of cryopreservation technique for freezing of the intact organ, and (C) successful execution of functional vascular reanastomosis upon thawing. The aim of this systematic review is to shed light on these challenges and summarize solutions that have been proposed so far in animal experiments and humans in the field of whole ovary cryopreservation and transplantation.
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Affiliation(s)
- Camille Hossay
- Pôle de Recherche en Gynécologie, Institut de Recherche Expérimentale et Clinique, Université Catholique de Louvain, 1200 Brussels, Belgium;
| | - Jacques Donnez
- Society for Research into Infertility, 1150 Brussels, Belgium;
| | - Marie-Madeleine Dolmans
- Pôle de Recherche en Gynécologie, Institut de Recherche Expérimentale et Clinique, Université Catholique de Louvain, 1200 Brussels, Belgium;
- Gynecology Department, Cliniques Universitaires Saint-Luc, 1200 Brussels, Belgium
- Correspondence: ; Tel.: +32-(0)2-764-5237; Fax: +32-(0)2-764-9507
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The Evolution of the Cryopreservation Techniques in Reproductive Medicine—Exploring the Character of the Vitrified State Intra- and Extracellularly to Better Understand Cell Survival after Cryopreservation. REPRODUCTIVE MEDICINE 2020. [DOI: 10.3390/reprodmed1020011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Nowadays, cryopreservation of gametes and embryos is a fundamental, integral, and indispensable part of infertility treatment or fertility preservation. Cryopreservation is not only needed for the policy of single embryo transfer and cryopreservation of surplus embryos, but for deferring embryo transfer in the case of ovarian hyperstimulation syndrome, uterine pathologies, and suboptimal endometrium built-up or when preimplantation genetic testing is needed. Several current strategies in assisted reproduction technology (ART) would be inconceivable without highly efficient cryopreservation protocols. Nevertheless, cryopreservation hampered for a long time, especially in terms of low survival rates after freezing and thawing. Only the technical progress during the last decades, namely, in regard to the implementation and advancement of vitrification, leveraged its application, and thus, even allows the cryopreservation of human oocytes—a process that is far from being easy. This review aims to provide a deeper insight into the physical processes of cryopreservation and to explore the character of the vitrified state in the extra and intracellular milieu in order to demonstrate that the common denominator to all cryopreservation procedures is the establishment of an intracellular amorphous condition that hinders the likelihood of crystallization.
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Xu H, Jia C, Cheng W, Zhang T, Tao R, Ma Y, Si L, Xu Y, Li J. The Effect of L-Carnitine Additive During In Vitro Maturation on the Vitrification of Pig Oocytes. Cell Reprogram 2020; 22:198-207. [PMID: 32673085 DOI: 10.1089/cell.2020.0014] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Cryopreservation of oocytes/embryos is an important technique for genetic resources; however, the success of vitrification in pig oocytes remained at a relatively lower level due to the high content of lipid droplets (LDs). Considering the positive effect of L-carnitine on the function of LDs, the present study was designed to investigate the effect of the addition of L-carnitine on the vitrification of porcine cumulus cells of complexes (cumulus/oocyte complexes [COCs]). First, COCs were randomly divided into two groups: one group of COCs were commonly in vitro maturation (IVM) for 42-46 hours (nonvitrification [NV]), while another group of COCs were IVM with 10 mM L-carnitine (NVL [nonvitrification with L-carnitine addition in IVM]). In addition, random parts of COCs with L-carnitine addition were vitrified (VL [vitrification with L-carnitine addition in IVM]), while vitrification was performed on COCs without L-carnitine used as control group (V). Results showed that the maturation rate of pig oocytes reduced significantly when the vitrification was performed at 16 hours during IVM (VL vs. NVL, 40.09 ± 2.85 vs. 90.76 ± 1.16; V vs. NV, 34.41 ± 2.55 vs. 89.71 ± 1.33, p < 0.01). With the addition of L-carnitine, intracellular LDs were decreased significantly (p < 0.01). However, no difference was observed on the efficiency of vitrification in pig oocytes (VL vs. V, 40.09 ± 2.85 vs. 34.41 ± 2.55, p > 0.05). In addition, not only the reactive oxygen species (ROS) level in pig oocytes with the L-carnitine addition group reduced significantly (p < 0.01), but also the expression of SOD1 gene was improved (p < 0.05). In conclusion, results demonstrated that although no difference could be observed on pig COC vitrification, the LDs and ROS level in pig oocytes could be modified by the addition of L-carnitine, which might be helpful for further development.
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Affiliation(s)
- Hongxia Xu
- College of Animal Science and Technology, and Nanjing Agricultural University, Nanjing, China
| | - Chao Jia
- College of Animal Science and Technology, and Nanjing Agricultural University, Nanjing, China
| | - Wenxiu Cheng
- College of Animal Science and Technology, and Nanjing Agricultural University, Nanjing, China
| | - Tongtong Zhang
- College of Animal Science and Technology, and Nanjing Agricultural University, Nanjing, China
| | - Ruixin Tao
- College of Animal Science and Technology, and Nanjing Agricultural University, Nanjing, China
| | - Yuehua Ma
- College of Horticulture, Nanjing Agricultural University, Nanjing, China
| | - Linan Si
- College of Animal Science and Technology, and Nanjing Agricultural University, Nanjing, China
| | - Yinxue Xu
- College of Animal Science and Technology, and Nanjing Agricultural University, Nanjing, China
| | - Juan Li
- College of Animal Science and Technology, and Nanjing Agricultural University, Nanjing, China
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Guo N, Xu Y, Luo M. Effects of graphene oxide on the crystallization behavior of VS55 during cooling and warming. Chem Phys 2020. [DOI: 10.1016/j.chemphys.2020.110735] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Cryopreservation method for spheroids and fabrication of scaffold-free tubular constructs. PLoS One 2020; 15:e0230428. [PMID: 32240195 PMCID: PMC7117714 DOI: 10.1371/journal.pone.0230428] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Accepted: 02/28/2020] [Indexed: 12/24/2022] Open
Abstract
Cryopreservation is a method used for preserving living cells by cooling them to very low temperatures. Although cryopreservation methods for oocytes and embryos have been developed for use in reproductive medicine, there are no established methods yet for preserving cell aggregates (spheroids) in regenerative medicine. We have developed a bio-three-dimensional (3D) printer that can fabricate scaffold-free 3D constructs by loading spheroids onto a needle array. We fabricated several constructs such as blood vessels, liver, diaphragm, and a conduit for nerves by using this method. These constructs have the potential to be applied in patients. However, the process of fabricating tissue constructs (harvesting cells, expanding cells, making spheroids using cultured cells, printing constructs, and maturing constructs) is time-consuming. Therefore, cryopreservation methods for spheroids or constructs should be developed to increase the efficiency of this method for clinical use. Here, we developed a method for cryopreserving spheroids, which were then used to fabricate constructs. Fibroblast cell-based spheroids were cryopreserved in phosphate-buffered saline or cryopreservation solution at −80°C for 1 week. After thawing, spheroids in cryopreservation solution began to fuse on day 1. Cryopreserved spheroids were printed onto a needle array to fabricate a scaffold-free tubular construct using a bio-3D printer. After 7 days, the printed spheroids fused and formed scaffold-free constructs. We confirmed the viability of cells in the cryopreserved spheroids and fabricated tubular constructs. Our results indicate that spheroids can be cryopreserved and used to prepare scaffold-free constructs for clinical use.
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Gene expression analysis of ovine prepubertal testicular tissue vitrified with a novel cryodevice (E.Vit). J Assist Reprod Genet 2019; 36:2145-2154. [PMID: 31414315 DOI: 10.1007/s10815-019-01559-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 08/06/2019] [Indexed: 12/11/2022] Open
Abstract
PURPOSE Testicular tissue cryopreservation prior to gonadotoxic therapies is a method to preserve fertility in children. However, the technique still requires development, especially when the tissue is immature and rather susceptible to stress derived from in vitro manipulation. This study aimed to investigate the effects of vitrification with a new cryodevice (E.Vit) on cell membrane integrity and gene expression of prepubertal testicular tissue in the ovine model. METHODS Pieces of immature testicular tissue (1 mm3) were inserted into "E.Vit" devices and vitrified with a two-step protocol. After warming, tissues were cultured in vitro and cell membrane integrity was assessed after 0, 2, and 24 h by trypan blue exclusion test. Controls consisted of non-vitrified tissue analyzed after 0, 2, and 24 h in vitro culture (IVC). Expression of genes involved in transcriptional stress response (BAX, SOD1, CIRBP, HSP90AB1), cell proliferation (KIF11), and germ- (ZBDB16, TERT, POU5F1, KIT) and somatic- (AR, FSHR, STAR) cell specific markers was evaluated 2 and 24 h after warming. RESULTS Post-warming trypan blue staining showed the survival of most cells, although membrane integrity immediately after warming (66.00% ± 4.73) or after 2 h IVC (59.67% ± 4.18) was significantly lower than controls (C0h 89.67% ± 1.45). Extended post-warming IVC (24 h) caused an additional decrease to 31% ± 3.46 (P < 0.05). Germ- and somatic-cell specific markers showed the survival of both cell types after cryopreservation and IVC. All genes were affected by cryopreservation and/or IVC, and moderate stress conditions were indicated by transcriptional stress response. CONCLUSIONS Vitrification with the cryodevice E.Vit is a promising strategy to cryopreserve prepubertal testicular tissue.
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Tiersch NJ, Childress WM, Tiersch TR. Three-Dimensional Printing of Vitrification Loop Prototypes for Aquatic Species. Zebrafish 2019; 16:252-261. [PMID: 29768115 PMCID: PMC6531896 DOI: 10.1089/zeb.2017.1520] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Vitrification is a method of cryopreservation that freezes samples rapidly, while forming an amorphous solid ("glass"), typically in small (μL) volumes. The goal of this project was to create, by three-dimensional (3D) printing, open vitrification devices based on an elliptical loop that could be efficiently used and stored. Vitrification efforts can benefit from the application of 3D printing, and to begin integration of this technology, we addressed four main variables: thermoplastic filament type, loop length, loop height, and method of loading. Our objectives were to: (1) design vitrification loops with varied dimensions; (2) print prototype loops for testing; (3) evaluate loading methods for the devices; and (4) classify vitrification responses to multiple device configurations. The various configurations were designed digitally using 3D CAD (Computer Aided Design) software, and prototype devices were produced with MakerBot® 3D printers. The thermoplastic filaments used to produce devices were acrylonitrile butadiene styrene (ABS) and polylactic acid (PLA). Vitrification devices were characterized by the film volumes formed with different methods of loading (pipetting or submersion). Frozen films were classified to determine vitrification quality: zero (opaque, or abundant crystalline ice formation); one (translucent, or partial vitrification), or two (transparent, or substantial vitrification, glass). A published vitrification solution was used to conduct experiments. Loading by pipetting formed frozen films more reliably than by submersion, but submersion yielded fewer filling problems and was more rapid. The loop designs that yielded the highest levels of vitrification enabled rapid transfer of heat, and most often were characterized as being longer and consisting of fewer layers (height). 3D printing can assist standardization of vitrification methods and research, yet can also provide the ability to quickly design and fabricate custom devices when needed.
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Affiliation(s)
| | - William M. Childress
- Aquatic Germplasm and Genetic Resources Center, School of Renewable Natural Resources, Louisiana State University Agricultural Center, Baton Rouge, Louisiana
| | - Terrence R. Tiersch
- Aquatic Germplasm and Genetic Resources Center, School of Renewable Natural Resources, Louisiana State University Agricultural Center, Baton Rouge, Louisiana
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Rivas Leonel EC, Lucci CM, Amorim CA. Cryopreservation of Human Ovarian Tissue: A Review. Transfus Med Hemother 2019; 46:173-181. [PMID: 31244585 PMCID: PMC6558345 DOI: 10.1159/000499054] [Citation(s) in RCA: 80] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Accepted: 02/01/2019] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Cryopreservation of human ovarian tissue has been increasingly applied worldwide to safeguard fertility in cancer patients, notably in young girls and women who cannot delay the onset of their treatment. Moreover, it has been proposed to patients with benign pathologies with a risk of premature ovarian insufficiency. So far, more than 130 live births have been reported after transplantation of cryopreserved ovarian tissue, and almost all patients recovered their ovarian function after tissue reimplantation. SUMMARY This review aims to summarize the recent results described in the literature regarding human ovarian tissue cryopreservation in terms of methods and main results obtained so far. To cryopreserve human ovarian tissue, most studies describe a slow freezing/rapid thawing protocol, which is usually an adaptation of a protocol developed for sheep ovarian tissue. Since freezing has been shown to have a deleterious effect on ovarian stroma and granulosa cells, various research groups have been vitrifying ovarian tissue. Despite promising results, only 2 babies have been born after transplantation of vitrified/warmed ovarian tissue. Optimization of both cryopreservation strategies as well as thawing/warming protocols is therefore necessary to improve the survival of follicles in cryopreserved ovarian tissue. KEY MESSAGES Human ovarian tissue cryopreservation has been successfully applied worldwide to preserve fertility in patients with malignant or nonmalignant pathologies that have a detrimental effect on fertility. Human ovarian tissue cryopreservation could also be applied as an alternative to postpone pregnancy or menopause in healthy women. Slow freezing and vitrification procedures have been applied to cryopreserve human ovarian tissue, but both alternatives require optimization.
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Affiliation(s)
- Ellen Cristina Rivas Leonel
- Institut de Recherche Expérimentale et Clinique, Pôle de Recherche en Gynécologie, Université Catholique de Louvain, Brussels, Belgium
- Institute of Biosciences, Department of Biology, Humanities and Exact Sciences, São Paulo State University, São José do Rio Preto, Brazil
| | - Carolina M. Lucci
- Institute of Biological Sciences, Department of Physiology, University of Brasília, Brasília, Brazil
| | - Christiani A. Amorim
- Institut de Recherche Expérimentale et Clinique, Pôle de Recherche en Gynécologie, Université Catholique de Louvain, Brussels, Belgium
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Coppola L, Cianflone A, Grimaldi AM, Incoronato M, Bevilacqua P, Messina F, Baselice S, Soricelli A, Mirabelli P, Salvatore M. Biobanking in health care: evolution and future directions. J Transl Med 2019; 17:172. [PMID: 31118074 PMCID: PMC6532145 DOI: 10.1186/s12967-019-1922-3] [Citation(s) in RCA: 171] [Impact Index Per Article: 34.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Accepted: 05/15/2019] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND The aim of the present review is to discuss how the promising field of biobanking can support health care research strategies. As the concept has evolved over time, biobanks have grown from simple biological sample repositories to complex and dynamic units belonging to large infrastructure networks, such as the Pan-European Biobanking and Biomolecular Resources Research Infrastructure (BBMRI). Biobanks were established to support scientific knowledge. Different professional figures with varied expertise collaborate to obtain and collect biological and clinical data from human subjects. At same time biobanks preserve the human and legal rights of each person that offers biomaterial for research. METHODS A literature review was conducted in April 2019 from the online database PubMed, accessed through the Bibliosan platform. Four primary topics related to biobanking will be discussed: (i) evolution, (ii) bioethical issues, (iii) organization, and (iv) imaging. RESULTS Most biobanks were founded as local units to support specific research projects, so they evolved in a decentralized manner. The consequence is an urgent needing for procedure harmonization regarding sample collection, processing, and storage. Considering the involvement of biomaterials obtained from human beings, different ethical issues such as the informed consent model, sample ownership, veto rights, and biobank sustainability are debated. In the face of these methodological and ethical challenges, international organizations such as BBMRI play a key role in supporting biobanking activities. Finally, a unique development is the creation of imaging biobanks that support the translation of imaging biomarkers (identified using a radiomic approach) into clinical practice by ensuring standardization of data acquisition and analysis, accredited technical validation, and transparent sharing of biological and clinical data. CONCLUSION Modern biobanks permit large-scale analysis for individuation of specific diseases biomarkers starting from biological or digital material (i.e., bioimages) with well-annotated clinical and biological data. These features are essential for improving personalized medical approaches, where effective biomarker identification is a critical step for disease diagnosis and prognosis.
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Affiliation(s)
- Luigi Coppola
- IRCCS SDN, Naples Via Emanuele Gianturco, 11, 80143 Naples, Italy
| | | | | | | | - Paolo Bevilacqua
- IRCCS SDN, Naples Via Emanuele Gianturco, 11, 80143 Naples, Italy
| | | | - Simona Baselice
- IRCCS SDN, Naples Via Emanuele Gianturco, 11, 80143 Naples, Italy
- Ospedale Evangelico Betania, Naples, Italy
| | - Andrea Soricelli
- IRCCS SDN, Naples Via Emanuele Gianturco, 11, 80143 Naples, Italy
- Department of Sport Sciences & Healthiness, University of Naples Parthenope, Naples, Italy
| | | | - Marco Salvatore
- IRCCS SDN, Naples Via Emanuele Gianturco, 11, 80143 Naples, Italy
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Cryopreservation and Transplantation of Vascularized Composite Transplants. Plast Reconstr Surg 2019; 143:1074e-1080e. [DOI: 10.1097/prs.0000000000005541] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Abstract
Tissue cryopreservation uses very low temperatures to preserve structurally intact living cells in their natural microenvironment. Cell survival is strongly influenced by the biophysical effects of ice during both the freezing and the subsequent thawing. These effects can be controlled by optimizing the fragment size, type of cryoprotectant, and cooling rate. The challenge is to determine cryopreservation parameters that suit all cell types present in the tissue. Here we describe a quick and convenient protocol for the cryopreservation of testicular tissue using an isopropyl-insulated freezing device, which was validated in both a mouse and a human model.
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Cai H, Niringiyumukiza JD, Li Y, Lai Q, Jia Y, Su P, Xiang W. Open versus closed vitrification system of human oocytes and embryos: a systematic review and meta-analysis of embryologic and clinical outcomes. Reprod Biol Endocrinol 2018; 16:123. [PMID: 30522492 PMCID: PMC6284284 DOI: 10.1186/s12958-018-0440-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Accepted: 11/19/2018] [Indexed: 01/30/2023] Open
Abstract
BACKGROUND The objective of this study was to carry out a systematic review and meta-analysis of embryologic and clinical outcomes following open versus closed vitrification of human oocytes and embryos. METHODS An electronic literature search was conducted in main electronic databases up to June 30, 2018 using the following key terms: 'oocyte', 'embryo', 'blastocyst', 'vitrification', 'cryopreservation', 'device', 'survival rate', 'pregnancy rate', etc. A meta-analysis was performed using a random effect model to estimate the value of risk ratios (RRs) and 95% confidence interval (CI). Subgroup analyses and sensitivity analyses were carried out to further confirm the results. RESULTS Twelve (Eight prospective and four retrospective) studies comparing open versus closed vitrification of human oocytes or embryos were included. For prospective studies on oocytes, no evidence for a significant difference in cryosurvival rate (RR = 0.91, 95% CI: 0.80-1.03, P = 0.14; n = 2048) or clinical pregnancy rate (RR = 1.29, 95% CI: 0.80-2.06, P = 0.30; n = 150) was observed. Additionally, there were no significant differences between the two methods concerning secondary endpoints included positive βHCG rate, implantation rate, miscarriage rate, ongoing pregnancy rate, live birth rate, cancellation rate, babies born per transferred blastocysts, or multiple birth rate (P > 0.05). The results of the retrospective studies were similar as the prospective studies. CONCLUSIONS It is still impossible to conclude that closed vitrification system could be a substitution for open system in human oocyte and embryo cryopreservation based on current evidence. Therefore, more well-designed prospective studies addressing these issues are still warranted.
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Affiliation(s)
- Hongcai Cai
- Family Planning Research Institute/Center of Reproductive Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China
| | - Jean Damascene Niringiyumukiza
- Family Planning Research Institute/Center of Reproductive Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China
| | - Yamin Li
- Family Planning Research Institute/Center of Reproductive Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China
| | - Qiaohong Lai
- Center of Reproductive Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China
| | - Yinzhao Jia
- Department of General Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China
| | - Ping Su
- Family Planning Research Institute/Center of Reproductive Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China.
| | - Wenpei Xiang
- Family Planning Research Institute/Center of Reproductive Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China.
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Kása E, Lujić J, Marinović Z, Kollár T, Bernáth G, Bokor Z, Urbányi B, Lefler KK, Jesenšek D, Horváth Á. Development of sperm vitrification protocols for two endangered salmonid species: the Adriatic grayling, Thymallus thymallus, and the marble trout, Salmo marmoratus. FISH PHYSIOLOGY AND BIOCHEMISTRY 2018; 44:1499-1507. [PMID: 29779063 DOI: 10.1007/s10695-018-0516-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Accepted: 05/08/2018] [Indexed: 06/08/2023]
Abstract
Vitrification was applied to the sperm of two endangered fish species of Soča River basin in Slovenia, the Adriatic grayling (Thymallus thymallus) and marble trout (Salmo marmoratus) following testing different cooling devices and vitrifying media. Sperm was collected, diluted in species-specific non-activating media containing cryoprotectants, and vitrified by plunging directly into liquid nitrogen without pre-cooling. Progressive motility, curvilinear velocity, and straightness of fresh and vitrified-warmed sperm were evaluated with computer-assisted sperm analysis (CASA). Fertilization trials were carried out to test the effectiveness of vitrification in the case of grayling. A protocol utilizing a glucose-based extender, 30% cryoprotectants (15% methanol + 15% propylene glycol), 1:1 dilution ratio, and droplets of 2 μl on a Cryotop as cooling device yielded the highest post-thaw motility values for both Adriatic grayling (7.5 ± 6.5%) and marble trout (26.6 ± 15.8%). Viable embryos were produced by fertilizing eggs with vitrified grayling sperm (hatching 13.1 ± 11.7%, control hatching 73.9 ± 10.4%). The vitrification protocol developed in this study can be utilized in the conservation efforts for the two species as an alternative to slow-rate freezing when working in field conditions or when specific equipment necessary for slow-rate freezing is not available.
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Affiliation(s)
- Eszter Kása
- Department of Aquaculture, Szent István University, Páter Károly u. 1., Gödöllő, 2100, Hungary.
| | - Jelena Lujić
- Department of Aquaculture, Szent István University, Páter Károly u. 1., Gödöllő, 2100, Hungary
| | - Zoran Marinović
- Department of Aquaculture, Szent István University, Páter Károly u. 1., Gödöllő, 2100, Hungary
| | - Tímea Kollár
- Department of Aquaculture, Szent István University, Páter Károly u. 1., Gödöllő, 2100, Hungary
| | - Gergely Bernáth
- Department of Aquaculture, Szent István University, Páter Károly u. 1., Gödöllő, 2100, Hungary
| | - Zoltán Bokor
- Department of Aquaculture, Szent István University, Páter Károly u. 1., Gödöllő, 2100, Hungary
| | - Béla Urbányi
- Department of Aquaculture, Szent István University, Páter Károly u. 1., Gödöllő, 2100, Hungary
| | - Kinga Katalin Lefler
- Department of Aquaculture, Szent István University, Páter Károly u. 1., Gödöllő, 2100, Hungary
| | - Dušan Jesenšek
- Ribiška družina Tolmin, Trg 1. maja 7, 5220, Tolmin, Slovenia
| | - Ákos Horváth
- Department of Aquaculture, Szent István University, Páter Károly u. 1., Gödöllő, 2100, Hungary
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Arav A, Natan Y, Kalo D, Komsky-Elbaz A, Roth Z, Levi-Setti PE, Leong M, Patrizio P. A new, simple, automatic vitrification device: preliminary results with murine and bovine oocytes and embryos. J Assist Reprod Genet 2018; 35:1161-1168. [PMID: 29802518 DOI: 10.1007/s10815-018-1210-9] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Accepted: 05/10/2018] [Indexed: 11/30/2022] Open
Abstract
PURPOSE This paper reports the use of a novel automatic vitrification device (Sarah, Fertilesafe, Israel) for cryopreservation of oocytes and embryos. METHODS Mice oocytes (n = 40) and embryos (8 cells, n = 35 and blastocysts, n = 165), bovine embryos (2PN, n = 35), and MII oocytes (n = 84) were vitrified using this automated device. A total of 42 (2 cells) mice embryos, 20 (2PN) bovine embryos, and 150 MII bovine oocytes were used as fresh controls and grown to blastocysts. Upon rewarming, all were assessed for viability, cleavage, blastocyst, and hatching rates. RESULTS Ninety-five % (38/40) of the mice MII oocytes regained isotonic volumes and all (100%) the surviving were viable. Rewarmed 8-cell mice embryos had 95% (33/35) blastulation rate and 80% (28/35) hatched. Rewarmed mice blastocysts had 97% survival rate (160/165) and 81% (135/165) hatched. Fresh control mice embryos had 100% (42/42) blastulation and 73% (21/42) hatching rates. Bovine embryos' survival was 100% with 54% (19/35) cleavage and 9% (3/35) blastulation rate. Fresh control bovine embryos had 65% (13/20) cleavage and 20% (4/20) blastulation rate. Vitrified bovine oocytes had 100% survival (84/84), 73% (61/84) cleavage, and 7% (6/84) blastocysts' rates; fresh control had 83% (125/150) cleavage and 11% (17/150) blastocysts' rates. CONCLUSION This novel automatic vitrification device is capable to produce high survival rates of oocytes and embryos. We anticipate that as the demand for vitrification of gametes, embryos, and reproductive tissues increases worldwide, the availability of an automated vitrification device will become indispensable for standardization, simplification, and reproducibility of the entire process.
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Affiliation(s)
- Amir Arav
- FertileSafe Ltd, 11 HaHarash st, 7403118, Nes-Ziona, Israel.
| | - Yehudit Natan
- FertileSafe Ltd, 11 HaHarash st, 7403118, Nes-Ziona, Israel
| | - Dorit Kalo
- Department of Animal Sciences, Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University, 76100, Rehovot, Israel.,Center of Excellence in Agriculture and Environmental Health, The Hebrew University, 76100, Rehovot, Israel
| | - Alisa Komsky-Elbaz
- Department of Animal Sciences, Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University, 76100, Rehovot, Israel.,Center of Excellence in Agriculture and Environmental Health, The Hebrew University, 76100, Rehovot, Israel
| | - Zvika Roth
- Department of Animal Sciences, Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University, 76100, Rehovot, Israel.,Center of Excellence in Agriculture and Environmental Health, The Hebrew University, 76100, Rehovot, Israel
| | - Paolo Emanuele Levi-Setti
- Department of Gynecology, Division of Gynecology and Reproductive Medicine, Humanitas Fertility Center, Humanitas Research Hospital, Milan, Italy
| | | | - Pasquale Patrizio
- FertileSafe Ltd, 11 HaHarash st, 7403118, Nes-Ziona, Israel.,Yale Fertility Center, New Haven, CT, USA
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In-vitro development of vitrified–warmed bovine oocytes after activation may be predicted based on mathematical modelling of cooling and warming rates during vitrification, storage and sample removal. Reprod Biomed Online 2018; 36:500-507. [DOI: 10.1016/j.rbmo.2018.01.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Revised: 01/02/2018] [Accepted: 01/09/2018] [Indexed: 01/26/2023]
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Anav M, Ferrières-Hoa A, Gala A, Fournier A, Zaragoza S, Vintejoux E, Vincens C, Hamamah S. [Birth weight and frozen embryo transfer: State of the art]. ACTA ACUST UNITED AC 2018; 46:489-496. [PMID: 29680508 DOI: 10.1016/j.gofs.2018.03.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Indexed: 11/26/2022]
Abstract
The aim of this study was to update our acknowledgment if there is a link between assisted embryo cryopreservation and epigenetics in human? Animal studies have demonstrated epigenetics consequence and especially imprinting disorders due to in vitro culture. In human, it is important to note that after frozen embryo transfer birth weight is significantly increased by 81 to 250g. But these studies cannot identify the reasons of such difference. This review strongly suggests that embryo cryopreservation is responsible for birth weight variations but mechanisms not yet elucidated. Epigenetics is probably one of these but to date, none study is able to prove it. We have to be attentive on a possible link between assisted reproductive technology (ART) and epigenetics reprogrammation.
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Affiliation(s)
- M Anav
- Département biologie de la reproduction/DPI, hôpital Arnaud-de-Villeneuve, 371, avenue du Doyen-Gaston-Giraud, 34295, Montpellier, France
| | - A Ferrières-Hoa
- Département biologie de la reproduction/DPI, hôpital Arnaud-de-Villeneuve, 371, avenue du Doyen-Gaston-Giraud, 34295, Montpellier, France
| | - A Gala
- Département biologie de la reproduction/DPI, hôpital Arnaud-de-Villeneuve, 371, avenue du Doyen-Gaston-Giraud, 34295, Montpellier, France
| | - A Fournier
- Département biologie de la reproduction/DPI, hôpital Arnaud-de-Villeneuve, 371, avenue du Doyen-Gaston-Giraud, 34295, Montpellier, France
| | - S Zaragoza
- Département biologie de la reproduction/DPI, hôpital Arnaud-de-Villeneuve, 371, avenue du Doyen-Gaston-Giraud, 34295, Montpellier, France
| | - E Vintejoux
- Service de gynécologie obstétrique, CHU Arnaud-de-Villeneuve, 371, avenue du Doyen-Gaston-Giraud, 34295, Montpellier, France
| | - C Vincens
- Service de gynécologie obstétrique, CHU Arnaud-de-Villeneuve, 371, avenue du Doyen-Gaston-Giraud, 34295, Montpellier, France
| | - S Hamamah
- Département biologie de la reproduction/DPI, hôpital Arnaud-de-Villeneuve, 371, avenue du Doyen-Gaston-Giraud, 34295, Montpellier, France.
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Cryoprotectant agents and cooling effect on embryos of Macrobrachium amazonicum. ZYGOTE 2018; 26:111-118. [PMID: 29655380 DOI: 10.1017/s0967199417000661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
SummaryThere are few reports of cryopreservation and injuries in Macrobrachium amazonicum embryos. Thus, the aim of this study was to analyze the effects of cryoprotectants agents and cooling on stage VIII of this species. Fertilized eggs from ovigerous females were removed from the incubation chamber, then placed in 10 ml Falcon tubes with a cryoprotectant solution and saline-free calcium solution. Thus, the embryos underwent a cooling curve of 1°C per min until reaching 5°C, and then were stored for 2 h. The tubes containing the embryos were washed to remove the cryoprotectant, acclimated for 5 min and then transferred to 50 ml incubators. At the end of the 24-h period, living embryos from each tube were counted and tabulated. A pool of embryos was fixed with 4% formaldehyde and then subjected to histology using 3-mm thick sections and stained with haematoxylin/eosin. Another pool was used for biometric analysis in which length, width and volume were analyzed. The cryoprotectants agents used were: dimethylsulfoxide (DMSO), methyl alcohol, ethylene glycol at 1, 5 and 10% and sucrose (0.5 M). Variance analysis was performed followed by Tukey's honest significant difference (HSD) test at 5% significance level. DMSO cryoprotectant affected embryo survival the least with rates of 71.8, 36.2 and 0% for concentrations of 1, 5 and 10%, respectively. Ethylene glycol caused 100% mortality at all the concentrations used. It was not possible to observe the interference of cooling and cryoprotectants on embryonic structures in this study.
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Guerrero J, Gallardo M, Rodríguez-Arnedo A, Ten J, Bernabeu R. Comparison of two closed carriers for vitrification of human blastocysts in a donor program. Cryobiology 2018. [PMID: 29526605 DOI: 10.1016/j.cryobiol.2018.03.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The survival of human blastocysts to vitrification with two different carriers is compared. Both vitrification carriers used in this study are in the category of closed carriers, as they completely isolate the samples from direct contact with liquid nitrogen or its vapours during cooling and storage, until warming. This characteristic is appealing because it reduces or eliminates the theoretical risk of cross-contamination during that period of time. The two closed vitrification systems used present very different design and features: in the High Security Vitrification device, the carrier straw containing the embryos is encapsulated inside an external straw before plunging in liquid nitrogen, resulting in thermal insulation during cooling. On the other hand, in the SafeSpeed carrier embryos are loaded in a thin-walled, narrow capillary designed to maximize the thermal transference. Both closed carriers achieved comparable outcomes in terms of survival of blastocysts to the vitrification process, with 97.5% vs. 96.1% survival with HSV and SafeSpeed, respectively. In conclusion, the cooling and warming rates at which these carriers operate, in combination with the cytosolic solute concentration in the cells of the cryopreserved blastocysts attained after a cryoprotectant-loading protocol, result in successful vitrification of human blastocysts for human assisted reproduction.
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Affiliation(s)
- Jaime Guerrero
- Instituto Bernabeu, Avda. Albufereta, 31, 03016, Alicante, Spain
| | - Miguel Gallardo
- Clínica Ginemed - Lisboa, Av. dos Combatentes, 43, 1600-042, Lisboa, Portugal; Escuela Superior de Ingeniería de Sevilla, Universidad de Sevilla, Av. De los descubrimientos S/n, 41092, Sevilla, Spain.
| | | | - Jorgen Ten
- Instituto Bernabeu, Avda. Albufereta, 31, 03016, Alicante, Spain
| | - Rafael Bernabeu
- Instituto Bernabeu, Avda. Albufereta, 31, 03016, Alicante, Spain
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Zilli L, Bianchi A, Sabbagh M, Pecoraro L, Schiavone R, Vilella S. Development of sea bream (Sparus aurata) semen vitrification protocols. Theriogenology 2018; 110:103-109. [PMID: 29353140 DOI: 10.1016/j.theriogenology.2017.12.039] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Revised: 12/22/2017] [Accepted: 12/27/2017] [Indexed: 11/19/2022]
Abstract
The long-term goal of this research project is to set up efficient protocol that can be used to develop a standardized approach for vitrification of marine fish spermatozoa. In particular, the aim of the present study was to develop a vitrification protocol for sea bream (Sparus aurata) spermatozoa. To draw up the protocol, we tested two different dilution media (1% NaCl and Mounib medium), three different vitrification devices (loops, drops and cut straws), different cryoprotectants (CPs) and three different equilibration times (30, 60 and 120 s). The effect of the different vitrification procedures on spermatozoa quality was checked by measuring spermatozoa motility rate and viability, mitochondrial membrane potential and the fertilizing ability of both fresh and post-thawed gametes. The best result was obtained by dropping directly into liquid nitrogen 20 μl of spermatozoa suspension (drop-wise method) diluted with Mounib buffer containing 10% Me2SO + 10% glycerol. The addition of a mixture of anti-freezing proteins, AFPI and AFPIII, to Mounib buffer significantly increases the spermatozoa quality following vitrification so confirming the usefulness of AFPs in improving the quality of gametes subjected to the vitrification process. The present study proves that vitrification offers an alternative to conventional sperm cryopreservation also in this species.
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Affiliation(s)
- Loredana Zilli
- Laboratory of Comparative Physiology, Department of Biological and Environmental Sciences and Technologies, University of Salento, Via Prov.le per Monteroni 73100, Lecce, Italy.
| | - Annalisa Bianchi
- Laboratory of Comparative Physiology, Department of Biological and Environmental Sciences and Technologies, University of Salento, Via Prov.le per Monteroni 73100, Lecce, Italy
| | - Maroua Sabbagh
- Laboratory of Comparative Physiology, Department of Biological and Environmental Sciences and Technologies, University of Salento, Via Prov.le per Monteroni 73100, Lecce, Italy
| | - Laura Pecoraro
- Laboratory of Comparative Physiology, Department of Biological and Environmental Sciences and Technologies, University of Salento, Via Prov.le per Monteroni 73100, Lecce, Italy
| | - Roberta Schiavone
- Laboratory of Comparative Physiology, Department of Biological and Environmental Sciences and Technologies, University of Salento, Via Prov.le per Monteroni 73100, Lecce, Italy
| | - Sebastiano Vilella
- Laboratory of Comparative Physiology, Department of Biological and Environmental Sciences and Technologies, University of Salento, Via Prov.le per Monteroni 73100, Lecce, Italy
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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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Youm HS, Choi JR, Oh D, Rho YH. Survival Rates in Closed and Open Vitrification for Human Mature Oocyte Cryopreservation: A Meta-Analysis. Gynecol Obstet Invest 2017; 83:268-274. [PMID: 29131105 DOI: 10.1159/000484243] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Accepted: 10/13/2017] [Indexed: 11/19/2022]
Abstract
BACKGROUND/AIMS Survival of warmed oocytes is the first part and is one of the most important aspects of in vitro fertilization following oocyte cryopreservation. There is no definite conclusion about the difference in survival rates between closed and open vitrification for oocyte cryopreservation. This study aimed to investigate whether there is a difference in survival rates between closed and open vitrification for cryopreservation of human mature oocytes. METHODS A literature search was performed using the MEDLINE, Cochrane Central Register of Controlled Trials, and Embase databases. A total of 4 studies were included in the meta-analysis. RESULTS In the frequentist meta-analysis, the random effects model showed no statistically significant difference in survival rates between closed and open vitrification (risk ratio [RR] 0.8873, 95% confidence interval [CI] 0.7658-1.0280). However, an effect size deviation of the RR from 1.0 and a borderline trend of the 95% CI were noted. In the Bayesian meta-analysis, the posterior probability that closed vitrification would decrease the survival rate when compared to that with open vitrification was 83.04% for the random effects model. CONCLUSION It is not yet possible to conclude that closed vitrification is an aseptic alternative to open vitrification in human mature oocyte cryopreservation.
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Arav A, Friedman O, Natan Y, Gur E, Shani N. Rat Hindlimb Cryopreservation and Transplantation: A Step Toward "Organ Banking". Am J Transplant 2017; 17:2820-2828. [PMID: 28422434 DOI: 10.1111/ajt.14320] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Revised: 04/07/2017] [Accepted: 04/12/2017] [Indexed: 01/25/2023]
Abstract
In 2016, over 5 million reconstructive procedures were performed in the United States. The recent successes of clinical vascularized composite allotransplantations, hand and face transplantations included, established the tremendous potential of these life-enhancing reconstructions. Nevertheless, due to limited availability and lifelong immunosuppression, application is limited. Long-term banking of composite transplants may increase the availability of esthetically compatible parts with partial or complete HLA matching, reducing the risk of rejection and the immunosuppressive burden. The study purpose was to develop efficient protocols for the cryopreservation and transplantation of a complete rodent limb. Directional freezing is a method in which a sample is cooled at a constant-velocity linear temperature gradient, enabling precise control of the process and ice crystal formation. Vitrification is an alternative cryopreservation method in which the sample solidifies without the formation of ice crystals. Testing both methods on a rat hindlimb composite tissue transplantation model, we found reliable, reproducible, and stable ways to preserve composite tissue. We believe that with further research and development, cryopreservation may lead to composite tissue "banks." This may lead to a paradigm shift from few and far apart emergent surgeries to wide-scale, well-planned, and better-controlled elective surgeries.
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Affiliation(s)
- A Arav
- FertileSafe Ltd, Nes-Ziona, Israel
| | - O Friedman
- The Department of Plastic and Reconstructive Surgery, Tel Aviv Sourasky Medical Center, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Y Natan
- FertileSafe Ltd, Nes-Ziona, Israel
| | - E Gur
- The Department of Plastic and Reconstructive Surgery, Tel Aviv Sourasky Medical Center, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - N Shani
- The Department of Plastic and Reconstructive Surgery, Tel Aviv Sourasky Medical Center, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
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Demirel MA, Acar DB, Ekim B, Çelikkan FT, Alkan KK, Salar S, Erdemli EA, Özkavukçu S, Yar SS, Kanca H, Baştan A. The evaluation of xenotransplantation of feline ovarian tissue vitrified by needle immersed vitrification technique into male immunodeficient mice. Cell Tissue Bank 2017; 19:133-147. [DOI: 10.1007/s10561-017-9663-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Accepted: 10/05/2017] [Indexed: 10/18/2022]
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Dumont L, Chalmel F, Oblette A, Berby B, Rives A, Duchesne V, Rondanino C, Rives N. Evaluation of apoptotic- and autophagic-related protein expressions before and after IVM of fresh, slow-frozen and vitrified pre-pubertal mouse testicular tissue. Mol Hum Reprod 2017; 23:738-754. [DOI: 10.1093/molehr/gax054] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Accepted: 10/09/2017] [Indexed: 12/12/2022] Open
Affiliation(s)
- L Dumont
- Normandie Univ, UNIROUEN, EA 4308 ‘Gametogenesis and Gamete Quality’, Rouen University Hospital, Department of Reproductive Biology—CECOS, F 76000 Rouen, France
- Institute for Research and Innovation in Biomedicine (IRIB), France
| | - F Chalmel
- Inserm U1085-IRSET, Université de Rennes 1, Rennes, France
| | - A Oblette
- Normandie Univ, UNIROUEN, EA 4308 ‘Gametogenesis and Gamete Quality’, Rouen University Hospital, Department of Reproductive Biology—CECOS, F 76000 Rouen, France
- Institute for Research and Innovation in Biomedicine (IRIB), France
| | - B Berby
- Normandie Univ, UNIROUEN, EA 4308 ‘Gametogenesis and Gamete Quality’, Rouen University Hospital, Department of Reproductive Biology—CECOS, F 76000 Rouen, France
- Institute for Research and Innovation in Biomedicine (IRIB), France
| | - A Rives
- Normandie Univ, UNIROUEN, EA 4308 ‘Gametogenesis and Gamete Quality’, Rouen University Hospital, Department of Reproductive Biology—CECOS, F 76000 Rouen, France
- Institute for Research and Innovation in Biomedicine (IRIB), France
| | - V Duchesne
- Normandie Univ, UNIROUEN, EA 4308 ‘Gametogenesis and Gamete Quality’, Rouen University Hospital, Department of Reproductive Biology—CECOS, F 76000 Rouen, France
- Institute for Research and Innovation in Biomedicine (IRIB), France
| | - C Rondanino
- Normandie Univ, UNIROUEN, EA 4308 ‘Gametogenesis and Gamete Quality’, Rouen University Hospital, Department of Reproductive Biology—CECOS, F 76000 Rouen, France
- Institute for Research and Innovation in Biomedicine (IRIB), France
| | - N Rives
- Normandie Univ, UNIROUEN, EA 4308 ‘Gametogenesis and Gamete Quality’, Rouen University Hospital, Department of Reproductive Biology—CECOS, F 76000 Rouen, France
- Institute for Research and Innovation in Biomedicine (IRIB), France
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Isachenko V, Rahimi G, Mallmann P, Sanchez R, Isachenko E. Technologies of cryoprotectant-free vitrification of human spermatozoa: asepticity as criterion of effectiveness. Andrology 2017; 5:1055-1063. [DOI: 10.1111/andr.12414] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Revised: 06/23/2017] [Accepted: 07/11/2017] [Indexed: 11/30/2022]
Affiliation(s)
- V. Isachenko
- Department of Obstetrics and Gynaecology; University Maternal Hospital; Cologne University; Cologne Germany
| | - G. Rahimi
- Department of Obstetrics and Gynaecology; University Maternal Hospital; Cologne University; Cologne Germany
| | - P. Mallmann
- Department of Obstetrics and Gynaecology; University Maternal Hospital; Cologne University; Cologne Germany
| | - R. Sanchez
- Center of Translational Medicine; Scientific and Technological Bioresource Nucleus (CEMT- BIOREN); Department of Preclinical Science, Faculty of Medicine, University de La Frontera; Temuco Chile
| | - E. Isachenko
- Department of Obstetrics and Gynaecology; University Maternal Hospital; Cologne University; Cologne Germany
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50
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Chen HH, Huang CC, Cheng EH, Lee TH, Chien LF, Lee MS. Optimal timing of blastocyst vitrification after trophectoderm biopsy for preimplantation genetic screening. PLoS One 2017; 12:e0185747. [PMID: 28982142 PMCID: PMC5628850 DOI: 10.1371/journal.pone.0185747] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Accepted: 09/12/2017] [Indexed: 01/08/2023] Open
Abstract
Is the timing of vitrification after trophectoderm (TE) biopsy associated with successful implantation and pregnancy after the embryo transfer of blastocysts subjected to preimplantation genetic screening (PGS)? In this retrospective cohort study, 1329 blastocysts from 223 patients were subjected to TE biopsy for performing array comparative genomic hybridization (CGH) tests. The PGS and frozen blastocyst transfer (FET) cycles were performed from December 2012 to May 2015. Only the good quality and expanded blastocysts on day 5 or 6 were selected for biopsy. After TE biopsy, the re-expansion grades relative to the original blastocoel were (1) collapsed blastocysts (CB), (2) 3/4 re-expansion but not full expansion (RE), and (3) full re-expansion or hatching (FE). All biopsied blastocysts were subjected to vitrification within 0.5-6 h after biopsy; the time intervals between TE biopsy and vitrification and the expansion grades at the time of vitrification were recorded. By combining two factors, namely the expansion grades and culture intervals between biopsy and vitrification, the patients were further divided into four groups, namely CB with a < 3 h culture interval (n = 34 cycles, Group I), RE and FE blastocysts with a < 3 h culture interval (n = 10 cycles, Group II); CB blastocysts with a ≥ 3 h culture interval (n = 6 cycles, Group III); and RE or FE blastocysts with a ≥ 3 h culture interval (n = 173 cycles, Group IV). The implantation (63.7%, 179/281) and clinical pregnancy (74.0%, 128/173) rates in Group IV were significantly higher than those in Group I (45.3%, 24/53; 50.0%, 17/34; P = 0.012 and 0.005, respectively). According to our findings, optimal vitrification timing > 3 hours to enable blastocysts to reach RE or FE provides improved implantation and pregnancy rates after FET. TRIAL REGISTRATION ClinicalTrials.gov NCT03065114.
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Affiliation(s)
- Hsiu-Hui Chen
- Division of Infertility, Lee Women’s Hospital, Taichung, Taiwan
- Department of Life Sciences, College of Life Sciences, National Chung Hsing University, Taichung, Taiwan
| | - Chun-Chia Huang
- Division of Infertility, Lee Women’s Hospital, Taichung, Taiwan
| | - En-Hui Cheng
- Division of Infertility, Lee Women’s Hospital, Taichung, Taiwan
| | - Tsung-Hsien Lee
- Division of Infertility, Lee Women’s Hospital, Taichung, Taiwan
- Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan
- Department of Obstetrics and Gynecology, Chung Shan Medical University Hospital, Taichung, Taiwan
- Department of Obstetrics and Gynecology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Lee-Feng Chien
- Department of Life Sciences, College of Life Sciences, National Chung Hsing University, Taichung, Taiwan
- * E-mail: (MSL); (LFC)
| | - Maw-Sheng Lee
- Division of Infertility, Lee Women’s Hospital, Taichung, Taiwan
- Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan
- Department of Obstetrics and Gynecology, Chung Shan Medical University Hospital, Taichung, Taiwan
- * E-mail: (MSL); (LFC)
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