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Mao Y, Tang N, Luo Y, Yin P, Li L. Effects of vitrified cryopreservation duration on IVF and neonatal outcomes. J Ovarian Res 2022; 15:101. [PMID: 36076245 PMCID: PMC9454210 DOI: 10.1186/s13048-022-01035-8] [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: 05/25/2022] [Accepted: 08/29/2022] [Indexed: 11/19/2022] Open
Abstract
Background In this study, we aimed to evaluate the impact of the duration of cryopreservation storage on embryo viability, implantation competence, pregnancy outcome and neonatal outcomes. Methods We retrospectively evaluated the outcomes of patients who underwent IVF with vitrified cryopreserved embryos between January 2004 and August 2019 by following the first frozen embryo transfer cycles within the study period. A total of 31,143 patients met the inclusion criteria and were grouped according to the embryo storage time as follows: Group 1 (n = 20,926),1–90 days; Group 2 (n = 6,472), 91–180 days; Group 3 (n = 2,237), 181–365 days; Group 4 (n = 746), 366–730 days; and Group 5 (n = 762), > 731 days. Results The embryo survival rate decreased significantly with longer durations of cryopreservation. The highest and lowest survival rate was recorded in Group 1 and Group 5, respectively (34853/35338; 98.63% vs. 1281/1801; 71.13%; P < 0.01). The human chorionic gonadotropin (HCG) detection and clinical pregnancy rate was highest in Group 1 (57.85% and 55. 26%, respectively; P < 0.01). Short-term cryopreservation (≤ 3 months) is associated with higher rates of clinical pregnancy. There were no significant differences in neonatal birth weight, neonatal height and congenital anomalies among the groups (P > 0. 05). Conclusion The prolonged storage time of vitrified embryos negatively affected survival rate and clinical pregnancy rate. It did not have a significant influence on neonatal health. This study provides new findings about the relationship between prolonged storage time of vitrified embryos and clinical outcomes and offers evidence for the safety of using long-stored embryos after vitrification.
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Affiliation(s)
- Yuling Mao
- Department of Obstetrics and Gynecology, Center for Reproductive Medicine, Guangdong Provincial Key Laboratory of Major Obstetric Diseases, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Key Laboratory for Reproductive Medicine of Guangdong Province, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Ni Tang
- Department of Obstetrics and Gynecology, Center for Reproductive Medicine, Guangdong Provincial Key Laboratory of Major Obstetric Diseases, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Yanfen Luo
- Department of Medicine Laboratory, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China.,Department of Medicine Laboratory, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, China
| | - Ping Yin
- Department of Clinical Laboratory, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.
| | - Lei Li
- Department of Obstetrics and Gynecology, Center for Reproductive Medicine, Guangdong Provincial Key Laboratory of Major Obstetric Diseases, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China. .,Key Laboratory for Reproductive Medicine of Guangdong Province, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.
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Vitrification of Dog Skin Tissue as a Source of Mesenchymal Stem Cells. BIOMED RESEARCH INTERNATIONAL 2021; 2021:1340281. [PMID: 34336999 PMCID: PMC8289570 DOI: 10.1155/2021/1340281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 06/22/2021] [Accepted: 07/05/2021] [Indexed: 11/17/2022]
Abstract
The purpose of this study was to develop an efficient vitrification system for cryopreservation of dog skin tissues as a source of stable autologous stem cells. In this study, we performed vitrification using four different cryoprotectants, namely, ethylene glycol (EG), dimethyl-sulfoxide (Me2SO), EG plus Me2SO, and EG plus Me2SO plus sucrose, and analyzed the behaviors of cells established from warmed tissues. Tissues vitrified with 15% EG, 15% Me2SO, and 0.5 M sucrose had a normal histological appearance and the highest cell viability after cell isolation, and thus, this cocktail of cryoprotectants was used in subsequent experiments. We evaluated proliferation and apoptosis of cells derived from fresh and vitrified tissues. These cells had a normal spindle-like morphology after homogenization through subculture. Dog dermal skin stem cells (dDSSCs) derived from fresh and vitrified tissues had similar proliferation capacities, and similar percentages of these cells were positive for mesenchymal stem cell markers at passage 3. The percentage of apoptotic cell did not differ between dDSSCs derived from fresh and vitrified tissues. Real-time PCR analysis revealed that dDSSCs at passage 3 derived from fresh and vitrified tissues had similar expression levels of pluripotency (OCT4, SOX2, and NANOG), proapoptotic (BAX), and antiapoptotic (BCL2 and BIRC5) genes. Both types of dDSSCs successfully differentiated into the mesenchymal lineage (adipocytes and osteocytes) under specific conditions, and their differentiation potentials did not significantly differ. Furthermore, the mitochondrial membrane potential of dDSSCs derived from vitrified tissues was comparable with that of dDSSCs derived from fresh tissues. We conclude that vitrification of dog skin tissues using cocktail solution in combination of 15% EG, 15% Me2SO, and 0.5 M sucrose allows efficient banking of these tissues for regenerative stem cell therapy and conservation of genetic resources.
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Teixeira M, Buff S, Desnos H, Loiseau C, Bruyère P, Joly T, Commin L. Ice nucleating agents allow embryo freezing without manual seeding. Theriogenology 2017; 104:173-178. [PMID: 28863350 DOI: 10.1016/j.theriogenology.2017.08.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Revised: 07/28/2017] [Accepted: 08/10/2017] [Indexed: 11/17/2022]
Abstract
Embryo slow freezing protocols include a nucleation induction step called manual seeding. This step is time consuming, manipulator dependent and hard to standardize. It requires access to samples, which is not always possible within the configuration of systems, such as differential scanning calorimeters or cryomicroscopes. Ice nucleation can be induced by other methods, e.g., by the use of ice nucleating agents. Snomax is a commercial preparation of inactivated proteins extracted from Pseudomonas syringae. The aim of our study was to investigate if Snomax can be an alternative to manual seeding in the slow freezing of mouse embryos. The influence of Snomax on the pH and osmolality of the freezing medium was evaluated. In vitro development (blastocyst formation and hatching rates) of fresh embryos exposed to Snomax and embryo cryopreserved with and without Snomax was assessed. The mitochondrial activity of frozen-thawed blastocysts was assessed by JC-1 fluorescent staining. Snomax didn't alter the physicochemical properties of the freezing medium, and did not affect embryo development of fresh embryos. After cryopreservation, the substitution of manual seeding by the ice nucleating agent (INA) Snomax did not affect embryo development or embryo mitochondrial activity. In conclusion, Snomax seems to be an effective ice nucleating agent for the slow freezing of mouse embryos. Snomax can also be a valuable alternative to manual seeding in research protocols in which manual seeding cannot be performed (i.e., differential scanning calorimetry and cryomicroscopy).
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Affiliation(s)
| | - Samuel Buff
- Univ Lyon, VetAgro Sup, Marcy l'Etoile, France
| | - Hugo Desnos
- Univ Lyon, VetAgro Sup, Marcy l'Etoile, France; Press Sorbonne Paris-Cité, Université Paris Descartes, Paris, France
| | | | | | - Thierry Joly
- Univ Lyon, VetAgro Sup, Marcy l'Etoile, France; Univ Lyon, ISARA-Lyon, Lyon, France
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Abstract
Vitrification is widely used to cryopreserve supernumerary embryos following in vitro fertilization (IVF). The mouse model was used to investigate the effects of vitrification on blastomere viability, using viability markers, and on the cytoskeleton, by analysing spindle/chromosome configurations, using confocal scanning microscopy. Ninety cleavage and morula stage dimethyl sulphoxide (DMSO)/EG vitrified mouse embryos were either processed immediately following warming for viability assessment by labelling with the fluorescent markers carboxyfluorescein-diacetate succinimidylester (CFSE) and propidium iodide (PI) or were cultured to the blastocyst stage and immunostained with α-tubulin antibody to visualize microtubules and DAPI or PI to visualize DNA. Sixty-five fresh embryos were also used as the control. Vitrified embryos showed high survival rates following warming, but they had a higher incidence of damaged blastomeres compared with fresh embryos. Most mitotic spindles examined in all groups were normal, but multivariable analysis revealed that the proportion of abnormal spindles was significantly higher in vitrified/warmed embryos (P < 0.05). This study is the first to examine the immediate effects of vitrification on blastomere viability, using fluorescent markers and shows that although vitrification results in a higher incidence of damaged blastomeres, vitrified embryos may compensate for this limited number of damaged/abnormal cells, as development to the blastocyst stage was not compromised.
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Gala A, Ferrières A, Assou S, Monforte M, Bringer-Deutsch S, Vintejoux E, Vincens C, Brunet C, Hamamah S. [Effects of artificial shrinkage prior to vitrification in a closed system: a randomized controlled trial]. ACTA ACUST UNITED AC 2014; 42:772-8. [PMID: 25442824 DOI: 10.1016/j.gyobfe.2014.09.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Accepted: 09/05/2014] [Indexed: 01/10/2023]
Abstract
OBJECTIVE To evaluate the effect of induced blastocoele shrinkage before vitrification in a closed carrier device. PATIENTS AND METHODS Prior to vitrification, blastocyst cavity was artificially shrinked by laser pulse or not treated according to a 2:1 randomized procedure. A total of 185 warming cycles from April 2011 to March 2013 have been analyzed. Clinical pregnancy rate and survival rate were compared between the two groups. The mean (±SD) women age was 33.5±5.7 years for both groups. RESULTS The pregnancy rate in the group with artificial reduction of the cavity was higher ([32/67] 47.7%) than in the control group but not significantly ([43/113] 38%). The survival rate in the artificial shrinkage group was significantly higher compared with the control group : 99% (102/103) and 91.8% (168/183) respectively (P=0.01). DISCUSSION AND CONCLUSION This study reveals that artificial shrinkage of blastocoelic cavity by laser pulse before vitrification in a closed carrier device improves survival rate after warming.
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Affiliation(s)
- A Gala
- Institut de recherche en biothérapie, hôpital Saint-Éloi, CHU de Montpellier, 34000 Montpellier, France; U1040, Inserm, 34000 Montpellier, France; UFR de médecine, université Montpellier-1, 34000 Montpellier, France; Service de gynécologie-obstétrique, hôpital Arnaud-de-Villeneuve, CHU de Montpellier, 34295 Montpellier cedex 5, France
| | - A Ferrières
- Institut de recherche en biothérapie, hôpital Saint-Éloi, CHU de Montpellier, 34000 Montpellier, France; U1040, Inserm, 34000 Montpellier, France; Service de gynécologie-obstétrique, hôpital Arnaud-de-Villeneuve, CHU de Montpellier, 34295 Montpellier cedex 5, France
| | - S Assou
- Institut de recherche en biothérapie, hôpital Saint-Éloi, CHU de Montpellier, 34000 Montpellier, France; U1040, Inserm, 34000 Montpellier, France; UFR de médecine, université Montpellier-1, 34000 Montpellier, France
| | - M Monforte
- Service de gynécologie-obstétrique, hôpital Arnaud-de-Villeneuve, CHU de Montpellier, 34295 Montpellier cedex 5, France
| | - S Bringer-Deutsch
- Service de gynécologie-obstétrique, hôpital Arnaud-de-Villeneuve, CHU de Montpellier, 34295 Montpellier cedex 5, France
| | - E Vintejoux
- Service de gynécologie-obstétrique, hôpital Arnaud-de-Villeneuve, CHU de Montpellier, 34295 Montpellier cedex 5, France
| | - C Vincens
- Service de gynécologie-obstétrique, hôpital Arnaud-de-Villeneuve, CHU de Montpellier, 34295 Montpellier cedex 5, France
| | - C Brunet
- Service de gynécologie-obstétrique, hôpital Arnaud-de-Villeneuve, CHU de Montpellier, 34295 Montpellier cedex 5, France
| | - S Hamamah
- Institut de recherche en biothérapie, hôpital Saint-Éloi, CHU de Montpellier, 34000 Montpellier, France; U1040, Inserm, 34000 Montpellier, France; UFR de médecine, université Montpellier-1, 34000 Montpellier, France; Service de gynécologie-obstétrique, hôpital Arnaud-de-Villeneuve, CHU de Montpellier, 34295 Montpellier cedex 5, France.
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Vajta G, Reichart A, Ubaldi F, Rienzi L. From a backup technology to a strategy-outlining approach: the success story of cryopreservation. ACTA ACUST UNITED AC 2014. [DOI: 10.1586/eog.12.80] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Vajta G. Vitrification in human and domestic animal embryology: work in progress. Reprod Fertil Dev 2014; 25:719-27. [PMID: 22951206 DOI: 10.1071/rd12118] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2012] [Accepted: 06/16/2012] [Indexed: 11/23/2022] Open
Abstract
According to the analysis of papers published in major international journals, rapidly increasing application of vitrification is one of the greatest achievements in domestic animal and especially human embryology during the first decade of our century. This review highlights factors supporting or hampering this progress, summarises results achieved with vitrification and outlines future tasks to fully exploit the benefits of this amazing approach that has changed or will change many aspects of laboratory (and also clinical) embryology. Supporting factors include the simplicity, cost efficiency and convincing success of vitrification compared with other approaches in all species and developmental stages in mammalian embryology, while causes that slow down the progress are mostly of human origin: inadequate tools and solutions, superficial teaching, improper application and unjustified concerns resulting in legal restrictions. Elimination of these hindrances seems to be a slower process and more demanding task than meeting the biological challenge. A key element of future progress will be to pass the pioneer age, establish a consensus regarding biosafety requirements, outline the indispensable features of a standard approach and design fully-automated vitrification machines executing all phases of the procedure, including equilibration, cooling, warming and dilution steps.
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Affiliation(s)
- Gábor Vajta
- Institute for Resource Industries and Sustainability, Central Queensland University, Rockhampton, Qld 4702, Australia.
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