1
|
Shadmanesh A, Nazari H. Alterations in the expression pattern of some epigenetic-related genes and microRNAs subsequent to oocyte cryopreservation. ZYGOTE 2023; 31:411-419. [PMID: 37337712 DOI: 10.1017/s0967199423000321] [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] [Indexed: 06/21/2023]
Abstract
MicroRNAs (miRNAs) are small non-encoding RNAs that actively regulate biological and physiological processes, and play an important role in regulating gene expression in all cells, especially in most animal cells, including oocytes and embryos. The expression of miRNAs at the right time and place is crucial for the oocyte's maturation and the embryo's subsequent development. Although assisted reproductive techniques (ART) have helped to solve many infertility problems, they cause changes in the expression of miRNA and genes in oocytes and preimplantation embryos, and the effect of these changes on the future of offspring is unknown, and has caused concerns. The relevant genomic alterations commonly imposed on embryos during cryopreservation may have potential epigenetic risks. Understanding the biological functions of miRNAs in frozen maturated oocytes may provide a better understanding of embryonic development and a comparison of fertility conservation in female mammals. With the development of new techniques for genomic evaluation of preimplantation embryos, it has been possible to better understand the effects of ART. The results of various articles have shown that freezing of oocytes and the cryopreservation method are effective for the expression of miRNAs and, in some cases, cause changes in the expression of miRNAs and epigenetic changes in the resulting embryo. This literature review study aimed to investigate the effects of oocyte cryopreservation in both pre-maturation and post-maturation stages, the cryopreservation method and the type of cryoprotectants (CPA) used on the expression of some epigenetic-related genes and miRNAs.
Collapse
Affiliation(s)
- Ali Shadmanesh
- Reproductive Biotechnology in Veterinary, Islamic Azad University, Eqlid Branch, Iran
| | - Hassan Nazari
- Research Institute of Animal Embryo Technology, Shahrekord University, Shahrekord, Iran
| |
Collapse
|
2
|
Keshavarzi S, Dokht Eftekhari A, Vahabzadeh H, Mehrafza M, Taheripanah R, Asgharnia M, Esfandyari S, Ghazifard A, Hosseinirad H, Paktinat S. Post-warming survival rates and clinical outcomes of human cleavage stage embryos vitrified/warmed using CryoTouch and Cryotop methods. MIDDLE EAST FERTILITY SOCIETY JOURNAL 2021. [DOI: 10.1186/s43043-021-00068-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
Vitrification has become the method of choice for cryopreservation of human embryos and gametes. There are multiple commercial media, containing different combinations and concentrations of cryoprotectants, available for vitrification and warming procedures. The aim of this retrospective study was to compare post-warming survival rate and clinical outcomes of cleavage stage embryos vitrified/warmed using two different commercial methods (CryoTouch and Cryotop) during intracytoplasmic sperm injection/frozen embryo transfer (ICSI/FET) cycles. This retrospective study evaluated a total of 173 FET cycles performed on 446 warmed cleavage stage embryos between January 2018 and December 2020. Post-warming embryo survival rate and clinical outcomes including clinical pregnancy, implantation, and live birth rates were calculated.
Results
The results showed no significant differences between two groups in terms of post-warming survival rate (p value = 0.5020), clinical pregnancy rate (p value = 0.7411), implantation rate (p value = 0.4694), and live birth rate (p value = 0.5737).
Conclusions
Collectively, high successful rates were observed in outcomes of vitrified/warmed cleavage stage embryos using both CryoTouch and Cryotop commercial methods.
Collapse
|
3
|
Dall'Agnol H, García Velasco JA. Frozen embryo transfer and preeclampsia: where is the link? Curr Opin Obstet Gynecol 2021; 32:213-218. [PMID: 32324715 DOI: 10.1097/gco.0000000000000624] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
PURPOSE OF REVIEW Preeclampsia is the leading cause of maternal death and has a higher incidence in patients undergoing assisted reproduction treatments. New studies about the mechanisms by which it is more frequent in this population have emerged. The purpose of this review is to gather current information about the available results on this correlation and its possible physiopathology. RECENT FINDINGS Recent publications on the physiopathology of preeclampsia indicate that the corpus luteum is the main source of hormonal production until placental formation and that apart from the secretion of estrogen and progesterone, corpus luteum also produces important substances involved in maternal circulatory adaptation, such as relaxin.With the recent increasing number of frozen embryos transfer in natural cycles or under hormonal replacement, this adaptive circulatory process may be unbalanced and predispose this population to preeclampsia. SUMMARY This article provides a review of frozen embryo transfer and available protocols, the highest incidence of gestational hypertensive disorders presented by the infertile population and an overview of the possible impact of the absence of corpus luteum on the genesis of this disease.
Collapse
|
4
|
Bartolac LK, Lowe JL, Koustas G, Grupen CG, Sjöblom C. Effect of different penetrating and non-penetrating cryoprotectants and media temperature on the cryosurvival of vitrified in vitro produced porcine blastocysts. Anim Sci J 2018; 89:1230-1239. [PMID: 29968319 DOI: 10.1111/asj.12996] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Accepted: 01/09/2018] [Indexed: 02/02/2023]
Abstract
The aim of this study was to determine the most efficient vitrification protocol for the cryopreservation of day 7 in vitro produced (IVP) porcine blastocysts. The post-warm survival rate of blastocysts vitrified in control (17% dimethyl sulfoxide + 17% ethylene glycol [EG] + 0.4 mol/L sucrose) and commercial media did not differ, nor did the post-warm survival rate of blastocysts vitrified in medium containing 1,2-propandiol in place of EG. However, vitrifying embryos in EG alone decreased the cryosurvival rate (55.6% and 33.6%, respectively, p < .05). Furthermore, the post-warm survival rates of blastocysts vitrified with either trehalose or sucrose as the non-penetrating cryoprotectant did not differ. There was also no significant difference in post-warm survival of blastocysts vitrified in control (38°C) media and room temperature (22°C) media with extended equilibration times, although when blastocysts were vitrified using control media at room temperature, the post-warm survival rate increased (56.8%, 57.3%, 72.5%, respectively, p < .05). The findings show that most cryoprotectant combinations examined proved equally effective at supporting the post-warm survival of IVP porcine blastocysts. The improved post-warm survival rate of blastocysts vitrified using media held at room temperature suggests that the cryoprotectant toxicity exerted in 22°C media was reduced.
Collapse
Affiliation(s)
- Louise Katherine Bartolac
- Faculty of Veterinary Science, The University of Sydney, Camden, NSW, Australia.,Westmead Fertility Centre, Westmead Hospital, Westmead, NSW, Australia
| | - Jenna Louise Lowe
- Faculty of Veterinary Science, The University of Sydney, Camden, NSW, Australia
| | - George Koustas
- Westmead Fertility Centre, Westmead Hospital, Westmead, NSW, Australia
| | | | - Cecilia Sjöblom
- Westmead Fertility Centre, Westmead Hospital, Westmead, NSW, Australia
| |
Collapse
|
5
|
Lestari SW, Ilato KF, Pratama MIA, Fitriyah NN, Pangestu M, Pratama G, Margiana R. Sucrose ‘Versus’ Trehalose Cryoprotectant Modification in Oocyte Vitrification : A Study of Embryo Development. ACTA ACUST UNITED AC 2018. [DOI: 10.13005/bpj/1351] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Numerous studies reported that vitrification, an ultra-rapid cooling technique, seems to be highly effective and could increase oocyte survival rate rather than slow freezing. The successful of oocyte vitrification depends on the proper combination of type and concentration of cryoprotectant. This study was addressed to determine the effects of the combination of type and concentration of cryoprotectants of vitrification media, notably in the embryo development. This experimental research was conducted by using oocyte obtained from thirty-two adult female Deutschland, Denken and Yoken (DDY) mice (7-8 weeks old). The MII mice oocytes were vitrified within 24 h after retrieval using the Cryotop method with cryoprotectants as follow : sucrose (16.5% EG, 16.5% DMSO, 0.5 mol/l sucrose), trehalose (16.5% EG, 16.5% DMSO, 0.5 mol/l trehalose) and Kitazato. The embryo development and morphological grading was observed at 2-cell and 8-cells under reverse phase light microscope and inverted microscope. This study demonstrated a good embryo development and morphological grading in sucrose and trehalose vitrification media. In embryo development, trehalose medium seems more superior compared to sucrose medium, even though Kitazato was the most superior compared to both. In the morphological grading, in 2-cells embryo, there were no significant differences between the three cryoprotectants, While, in 8-cells embryo, trehalose medium appeared to be superior compared to sucrose medium, even though seemed more inferior compared to Kitazato. The appropriate type and concentration of sugar as extracellular cryoprotectant was trehalose in oocyte vitrification based on embryo development, compared to sucrose.
Collapse
Affiliation(s)
- Silvia W. Lestari
- Department of Medical Biology, Faculty of Medicine Universitas Indonesia
| | - Khairunnisa F. Ilato
- Bachelor Program for Medical Sciences, Faculty of Medicine Universitas Indonesia
| | - M. Iqbal A. Pratama
- Bachelor Program for Medical Sciences, Faculty of Medicine Universitas Indonesia
| | - Nurin N. Fitriyah
- Master Program for Biomedical Sciences, Faculty of Medicine Universitas Indonesia
| | - Mulyoto Pangestu
- Department of Obstetric and Gynecology, Monash Clinical School, Monash University
| | - Gita Pratama
- Department of Obstetric and Gynecology, Faculty of Medicine Universitas Indonesia
| | - Ria Margiana
- Department of Anatomy, Faculty of Medicine Universitas Indonesia
| |
Collapse
|
6
|
Do VH, Walton S, Catt S, Taylor-Robinson AW. A comparative analysis of the efficacy of three cryopreservation protocols on the survival of in vitro-derived cattle embryos at pronuclear and blastocyst stages. Cryobiology 2017; 77:58-63. [PMID: 28545999 DOI: 10.1016/j.cryobiol.2017.05.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Revised: 04/27/2017] [Accepted: 05/20/2017] [Indexed: 02/08/2023]
Abstract
The effectiveness of three cryopreservation protocols (slow freezing, short equilibration vitrification and long equilibration vitrification) on in vitro-derived cattle embryos at expanded blastocyst and pronuclear stages was compared. 199 expanded blastocysts of good quality were assigned randomly into four treatment groups [control, non-cryopreserved (fresh, unfrozen); and the three cryopreservation methods]. The re-expansion of the cryopreserved blastocysts after 24 h in vitro culture was similar to that of the fresh control group. However, the hatching rate of expanded blastocysts after 48 h culture was significantly less for the slow freezing group (31/47; 66.0%) than for both the short equilibration vitrification (46/51; 90.2%) and long equilibration vitrification groups (42/50; 84.0%). Denuded presumptive zygotes at the pronuclear stage (14-18 h post-insemination) were assigned randomly to the same four treatment groups and, following thawing, embryos were assessed for their capacity to cleave and to develop into a blastocyst. Overall, cleavage rates of cryopreserved zygotes were significantly less than those of the fresh control. The blastocyst formation rate of slow-frozen zygotes (4/81; 4.9%) was significantly less than that of zygotes subjected either to short equilibration vitrification (18/82; 22.0%) or long equilibration vitrification (16/74; 21.6%). All cryopreservation groups showed rates of blastocyst formation that were significantly less than that of the fresh control (51/92; 55.4%). Collectively, our findings indicate that vitrification is the preferred technology to cryopreserve in vitro-derived cattle embryos at expanded blastocyst and pronuclear stages. Moreover, short equilibration vitrification technology can improve outcomes and be more efficient by taking less time to perform.
Collapse
Affiliation(s)
- Van Huong Do
- School of Health, Medical & Applied Sciences, Central Queensland University, Rockhampton, QLD 4702, Australia; National Key Laboratory of Animal Cell Technology, National Institute of Animal Sciences, Hanoi, Viet Nam.
| | - Simon Walton
- Australian Reproductive Technologies, Mt Chalmers, QLD 4702, Australia.
| | - Sally Catt
- Education Program in Reproduction & Development, Department of Obstetrics & Gynaecology, Monash University, Clayton, VIC 3168, Australia.
| | - Andrew W Taylor-Robinson
- School of Health, Medical & Applied Sciences, Central Queensland University, Rockhampton, QLD 4702, Australia.
| |
Collapse
|
7
|
Jena S, Aksan A. Effect of high DMSO concentration on albumin during freezing and vitrification. RSC Adv 2017. [DOI: 10.1039/c7ra07556a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This is a light microscopy image taken of the frozen solution at −20 °C during equilibrium freezing. The freeze concentrate surrounding the ice crystals, comprises unfrozen water and solutes (DMSO and albumin). The bright rectangle is the IR aperture.
Collapse
Affiliation(s)
- Sampreeti Jena
- Biostabilization Laboratory
- Mechanical Engineering Department
- University of Minnesota
- Minneapolis
- USA
| | - Alptekin Aksan
- Biostabilization Laboratory
- Mechanical Engineering Department
- University of Minnesota
- Minneapolis
- USA
| |
Collapse
|
8
|
Cryopreservation of human oocytes, zygotes, embryos and blastocysts: A comparison study between slow freezing and ultra rapid (vitrification) methods. MIDDLE EAST FERTILITY SOCIETY JOURNAL 2013. [DOI: 10.1016/j.mefs.2012.10.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
|