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Pérez-Padilla NA, Garcia-Sanchez R, Avalos O, Gálvez J, Bian M, Yu L, Shu Y, Feng M, Yelian FD. Optimizing trigger timing in minimal ovarian stimulation for In Vitro fertilization using machine learning models with random search hyperparameter tuning. Comput Biol Med 2024; 179:108856. [PMID: 39053332 DOI: 10.1016/j.compbiomed.2024.108856] [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: 04/26/2024] [Revised: 06/15/2024] [Accepted: 07/06/2024] [Indexed: 07/27/2024]
Abstract
Various studies have emphasized the importance of identifying the optimal Trigger Timing (TT) for the trigger shot in In Vitro Fertilization (IVF), which is crucial for the successful maturation and release of oocytes, especially in minimal ovarian stimulation treatments. Despite its significance for the ultimate success of IVF, determining the precise TT remains a complex challenge for physicians due to the involvement of multiple variables. This study aims to enhance TT by developing a machine learning multi-output model that predicts the expected number of retrieved oocytes, mature oocytes (MII), fertilized oocytes (2 PN), and useable blastocysts within a 48-h window after the trigger shot in minimal stimulation cycles. By utilizing this model, physicians can identify patients with possible early, late, or on-time trigger shots. The study found that approximately 27 % of treatments administered the trigger shot on a suboptimal day, but optimizing the TT using the developed Artificial Intelligence (AI) model can potentially increase useable blastocyst production by 46 %. These findings highlight the potential of predictive models as a supplementary tool for optimizing trigger shot timing and improving IVF outcomes, particularly in minimal ovarian stimulation. The experimental results underwent statistical validation, demonstrating the accuracy and performance of the model. Overall, this study emphasizes the value of AI prediction models in enhancing TT and making the IVF process safer and more efficient.
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Affiliation(s)
| | - Rodolfo Garcia-Sanchez
- Life IVF Center, Irvine, CA, United States; Reproductive Clinical Science, Eastern Virginia Medical School, Norfolk, VA, United States
| | - Omar Avalos
- Departamento de Electrónica, Universidad de Guadalajara, CUCEI, Guadalajara, Jal, Mexico
| | - Jorge Gálvez
- Departamento de Electrónica, Universidad de Guadalajara, CUCEI, Guadalajara, Jal, Mexico
| | - Minglei Bian
- Reproductive Clinical Science, Eastern Virginia Medical School, Norfolk, VA, United States
| | - Liang Yu
- Reproductive Clinical Science, Eastern Virginia Medical School, Norfolk, VA, United States
| | - Yimin Shu
- Life IVF Center, Irvine, CA, United States; Department of Obstetrics and Gynecology, The University of Kansas Health System, Kansas City, KS, United States
| | - Ming Feng
- Life IVF Center, Irvine, CA, United States
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2
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Chen F, Zhang M, Song Z, Meng R, He J, Xu X, Deng S, Sun M, Kou Z, Lin J. Melatonin partially rescues defects induced by tranexamic acid exposure during oocyte maturation in mice. Am J Physiol Cell Physiol 2024; 327:C778-C789. [PMID: 39069826 DOI: 10.1152/ajpcell.00339.2024] [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: 05/20/2024] [Revised: 07/17/2024] [Accepted: 07/19/2024] [Indexed: 07/30/2024]
Abstract
Tranexamic acid (TXA) is widely used among young women because of its ability to whiten skin and treat menorrhagia. Nevertheless, its potential effects on oocyte maturation and quality have not yet been clearly clarified. Melatonin (MT) is an endogenous hormone released by the pineal gland and believed to protect cells from oxidative stress injury. In the present study, we used an in vitro maturation model to investigate the toxicity of TXA and the protective role of MT in mouse oocytes. Compared with the control group, the TXA-exposed group had significantly lower nuclear maturation (57.72% vs. 94.08%, P < 0.001) and early embryo cleavage rates (38.18% vs. 87.66%, P < 0.001). Further study showed that spindle organization (52.56% vs. 18.77%, P < 0.01) and chromosome alignment (33.23% vs. 16.66%, P < 0.01) were also disrupted after TXA treatment. Mechanistically, we have demonstrated that TXA induced early apoptosis of oocytes (P < 0.001) by raising the level of reactive oxygen species (P < 0.001), which was consistent with an increase in mitochondrial damage (P < 0.01). Fortunately, all these effects except the spindle defect were successfully rescued by an appropriate level of MT. Collectively, our findings indicate that MT could partially reverse TXA-induced oocyte quality deterioration in mice by effectively improving mitochondrial function and reducing oxidative stress-mediated apoptosis.NEW & NOTEWORTHY Tranexamic acid is increasingly used to whiten skin, reverse dermal damages, and treat heavy menstrual bleeding in young women. However, its potential toxicity in mammalian oocytes is still unclear. Our study revealed that tranexamic acid exposure impaired the mouse oocyte quality and subsequent embryo development. Meanwhile, melatonin has been found to exert beneficial effects in reducing tranexamic acid-induced mitochondrial dysfunction and oxidative stress.
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Affiliation(s)
- Fei Chen
- Department of Physiology, Jining Medical University, Jining, People's Republic of China
| | - Mengyao Zhang
- Department of Physiology, Jining Medical University, Jining, People's Republic of China
| | - Zihan Song
- Department of Physiology, Jining Medical University, Jining, People's Republic of China
| | - Rui Meng
- Department of Physiology, Jining Medical University, Jining, People's Republic of China
| | - Jiayi He
- Department of Physiology, Jining Medical University, Jining, People's Republic of China
| | - Xiuli Xu
- Department of Physiology, Jining Medical University, Jining, People's Republic of China
| | - Shuwen Deng
- Department of Physiology, Jining Medical University, Jining, People's Republic of China
| | - Meng Sun
- Department of Physiology, Jining Medical University, Jining, People's Republic of China
| | - Zhenyu Kou
- Department of Physiology, Jining Medical University, Jining, People's Republic of China
| | - Juan Lin
- Department of Physiology, Jining Medical University, Jining, People's Republic of China
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Yildirim RM, Seli E. Mitochondria as determinants of reproductive senescence and competence: implications for diagnosis of embryo competence in assisted reproduction. Hum Reprod 2024:deae171. [PMID: 39066612 DOI: 10.1093/humrep/deae171] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2024] [Revised: 07/04/2024] [Indexed: 07/28/2024] Open
Abstract
Mitochondria are commonly recognized as the powerhouses of the cell, primarily responsible for energy production through oxidative phosphorylation. Alongside this vital function, they also play crucial roles in regulating calcium signaling, maintaining membrane potential, and modulating apoptosis. Their involvement in various cellular pathways becomes particularly evident during oogenesis and embryogenesis, where mitochondrial quantity, morphology, and distribution are tightly controlled. The efficiency of the mitochondrial network is maintained through multiple quality control mechanisms that are essential for reproductive success. These include mitochondrial unfolded protein response, mitochondrial dynamics, and mitophagy. Not surprisingly, mitochondrial dysfunction has been implicated in infertility and ovarian aging, prompting investigation into mitochondria as diagnostic and therapeutic targets in assisted reproduction. To date, mitochondrial DNA copy number in oocytes, cumulus cells, and trophectoderm biopsies, and fluorescent lifetime imaging microscopy-based assessment of NADH and flavin adenine dinucleotide content have been explored as potential predictors of embryo competence, yielding limited success. Despite challenges in the clinical application of mitochondrial diagnostic strategies, these enigmatic organelles have a significant impact on reproduction, and their potential role as diagnostic targets in assisted reproduction is likely to remain an active area of investigation in the foreseeable future.
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Affiliation(s)
- Raziye Melike Yildirim
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, New Haven, CT, USA
| | - Emre Seli
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, New Haven, CT, USA
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4
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Lee IW, Tazehkand AP, Sha ZY, Adhikari D, Carroll J. An aggregated mitochondrial distribution in preimplantation embryos disrupts nuclear morphology, function, and developmental potential. Proc Natl Acad Sci U S A 2024; 121:e2317316121. [PMID: 38917013 PMCID: PMC11228517 DOI: 10.1073/pnas.2317316121] [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: 10/13/2023] [Accepted: 05/23/2024] [Indexed: 06/27/2024] Open
Abstract
A dispersed cytoplasmic distribution of mitochondria is a hallmark of normal cellular organization. Here, we have utilized the expression of exogenous Trak2 in mouse oocytes and embryos to disrupt the dispersed distribution of mitochondria by driving them into a large cytoplasmic aggregate. Our findings reveal that aggregated mitochondria have minimal impact on asymmetric meiotic cell divisions of the oocyte. In contrast, aggregated mitochondria during the first mitotic division result in daughter cells with unequal sizes and increased micronuclei. Further, in two-cell embryos, microtubule-mediated centering properties of the mitochondrial aggregate prevent nuclear centration, distort nuclear shape, and inhibit DNA synthesis and the onset of embryonic transcription. These findings demonstrate the motor protein-mediated distribution of mitochondria throughout the cytoplasm is highly regulated and is an essential feature of cytoplasmic organization to ensure optimal cell function.
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Affiliation(s)
- In-Won Lee
- Department of Anatomy and Developmental Biology, Monash Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia
| | - Abbas Pirpour Tazehkand
- Department of Anatomy and Developmental Biology, Monash Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia
| | - Zi-Yi Sha
- Department of Anatomy and Developmental Biology, Monash Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia
| | - Deepak Adhikari
- Department of Anatomy and Developmental Biology, Monash Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia
| | - John Carroll
- Department of Anatomy and Developmental Biology, Monash Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia
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5
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Ergun Y, Imamoglu AG, Cozzolino M, Demirkiran C, Basar M, Garg A, Yildirim RM, Seli E. Mitochondrial Unfolded Protein Response Gene Clpp Is Required for Oocyte Function and Female Fertility. Int J Mol Sci 2024; 25:1866. [PMID: 38339144 PMCID: PMC10855406 DOI: 10.3390/ijms25031866] [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: 01/02/2024] [Revised: 01/28/2024] [Accepted: 02/02/2024] [Indexed: 02/12/2024] Open
Abstract
Mitochondrial unfolded protein stress response (mtUPR) plays a critical role in regulating cellular and metabolic stress response and helps maintain protein homeostasis. Caseinolytic peptidase P (CLPP) is one of the key regulators of mtUPR and promotes unfolded protein degradation. Previous studies demonstrated that global deletion of Clpp resulted in female infertility, whereas no impairment was found in the mouse model with targeted deletion of Clpp in cumulus/granulosa cells. These results suggest the need to delineate the function of Clpp in oocytes. In this study, we aimed to further explore the role of mtUPR in female reproductive competence and senescence using a mouse model. Oocyte-specific targeted deletion of Clpp in mice resulted in female subfertility associated with metabolic and functional abnormalities in oocytes, thus highlighting the importance of CLPP-mediated protein homeostasis in oocyte competence and reproductive function.
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Affiliation(s)
- Yagmur Ergun
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, New Haven, CT 06510, USA
- IVIRMA Global Research Alliance, IVIRMA New Jersey, Marlton, NJ 07920, USA
| | - Aysegul Gizem Imamoglu
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, New Haven, CT 06510, USA
| | - Mauro Cozzolino
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, New Haven, CT 06510, USA
- IVIRMA Global Research Alliance, IVI Roma, 00169 Rome, Italy
- IVIRMA Global Research Alliance, IVI Foundation, Instituto de Investigación Sanitaria La Fe (IIS La Fe), 46026 Valencia, Spain
| | - Cem Demirkiran
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, New Haven, CT 06510, USA
| | - Murat Basar
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, New Haven, CT 06510, USA
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale Fertility Center, Orange, CT 06477, USA
| | - Akanksha Garg
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, New Haven, CT 06510, USA
- Department of Metabolism, Digestion and Reproduction, Imperial College London, London SW7 2BX, UK
| | - Raziye Melike Yildirim
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, New Haven, CT 06510, USA
| | - Emre Seli
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, New Haven, CT 06510, USA
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale Fertility Center, Orange, CT 06477, USA
- IVIRMA Global Research Alliance, IVIRMA New Jersey, Basking Ridge, NJ 07920, USA
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Nguyen HT, Nguyen NT, Nguyen LV, Bui XN, Nguyen VH, Nguyen VK, Vu HTT, Nguyen ST, Nguyen HT. The effects of pretreatment with Cyclosporin A and Docetaxel before vitrification of porcine immature oocytes on subsequent embryo development. Reprod Biol 2023; 23:100798. [PMID: 37717489 DOI: 10.1016/j.repbio.2023.100798] [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: 07/10/2023] [Revised: 08/14/2023] [Accepted: 08/18/2023] [Indexed: 09/19/2023]
Abstract
In the present study, we attempted to improve the developmental competence of vitrified immature porcine oocytes by the preservation of mitochondrial properties using Cyclosporin A (CsA, inhibitor of mitochondrial membrane permeability transition) and Docetaxel (stabilizer of microtubules, hence mitochondrial distribution). In Experiment 1, Mitotracker red staining revealed reduced mitochondrial activity (MA) in vitrified/warmed oocytes at 0 and 22 h of in vitro maturation (IVM) compared with fresh ones. However, by at 46 h of IVM, MA levels in vitrified oocytes were similar to those in fresh control. Treatment of oocytes with CsA or Docetaxel improved MA at 0 h and 22 h of IVM compared with non-treated vitrified oocytes. However, there were no significant differences among groups in percentages of survival, maturation and embryo development after subsequent IVM and parthenogenetic activation. Nevertheless, a pretreatment with a combination of 10 µg/mL CsA and 0.05 µM Docetaxel improved the blastocyst formation of vitrified oocytes compared with non-treatment counterparts (11.2 ± 1.6% vs 5.9 ± 1.6%, P < 0.05). In conclusion, vitrification reduced mitochondrial activity in GV-stage oocytes during 0-22 h of IVM; however, it was normalized by 46 h IVM. Docetaxel or CsA pretreatment alone did not improve development competence of vitrified oocytes. However, pretreatment with a combination of CsA and Docetaxel could improve blastocyst formation rates.
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Affiliation(s)
- Hong Thi Nguyen
- Institute of Biotechnology (IBT), Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Nhung Thi Nguyen
- Institute of Biotechnology (IBT), Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Linh Viet Nguyen
- Institute of Biotechnology (IBT), Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Xuan Nguyen Bui
- Institute of Biotechnology (IBT), Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Van Hanh Nguyen
- Institute of Biotechnology (IBT), Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Van Khanh Nguyen
- Key Lab of Animal Cell Biotechnology, National Institute of Animal Science (NIAS), Hanoi, Vietnam
| | - Huong Thu Thi Vu
- Key Lab of Animal Cell Biotechnology, National Institute of Animal Science (NIAS), Hanoi, Vietnam
| | - Sam Thi Nguyen
- Institute of Biotechnology (IBT), Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Hiep Thi Nguyen
- Institute of Biotechnology (IBT), Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam.
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7
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Okamoto R, Xiao W, Fukasawa H, Hirata S, Sankai T, Masuyama H, Otsuki J. Aggregated chromosomes/chromatin transfer: a novel approach for mitochondrial replacement with minimal mitochondrial carryover: the implications of mouse experiments for human aggregated chromosome transfer. Mol Hum Reprod 2023; 29:gaad043. [PMID: 38039159 DOI: 10.1093/molehr/gaad043] [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: 08/30/2023] [Revised: 11/01/2023] [Indexed: 12/03/2023] Open
Abstract
Nuclear transfer techniques, including spindle chromosome complex (SC) transfer and pronuclear transfer, have been employed to mitigate mitochondrial diseases. Nevertheless, the challenge of mitochondrial DNA (mtDNA) carryover remains unresolved. Previously, we introduced a method for aggregated chromosome (AC) transfer in human subjects, offering a potential solution. However, the subsequent rates of embryonic development have remained unexplored owing to legal limitations in Japan, and animal studies have been hindered by a lack of AC formation in other species. Building upon our success in generating ACs within mouse oocytes via utilization of the phosphodiesterase inhibitor 3-isobutyl 1-methylxanthine (IBMX), this study has established a mouse model for AC transfer. Subsequently, a comparative analysis of embryo development rates and mtDNA carryover between AC transfer and SC transfer was conducted. Additionally, the mitochondrial distribution around SC and AC structures was investigated, revealing that in oocytes at the metaphase II stage, the mitochondria exhibited a relatively concentrated arrangement around the spindle apparatus, while the distribution of mitochondria in AC-formed oocytes appeared to be independent of the AC position. The AC transfer approach produced a marked augmentation in rates of fertilization, embryo cleavage, and blastocyst formation, especially as compared to scenarios without AC transfer in IBMX-treated AC-formed oocytes. No significant disparities in fertilization and embryo development rates were observed between AC and SC transfers. However, relative real-time PCR analyses revealed that the mtDNA carryover for AC transfers was one-tenth and therefore significantly lower than that of SC transfers. This study successfully accomplished nuclear transfers with ACs in mouse oocytes, offering an insight into the potential of AC transfers as a solution to heteroplasmy-related challenges. These findings are promising in terms of future investigation with human oocytes, thus advancing AC transfer as an innovative approach in the field of human nuclear transfer methodology.
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Affiliation(s)
- R Okamoto
- Department of Obstetrics and Gynecology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Kita, Okayama, Japan
| | - W Xiao
- Department of Applied Animal Science, Graduate School of Environmental, Life, Natural Science and Technology, Okayama University, Kita, Okayama, Japan
| | - H Fukasawa
- Department of Obstetrics and Gynecology, Faculty of Medicine, University of Yamanashi, Chuo, Yamanashi, Japan
| | - S Hirata
- Department of Obstetrics and Gynecology, Faculty of Medicine, University of Yamanashi, Chuo, Yamanashi, Japan
| | - T Sankai
- Tsukuba Primate Research Center, National Institutes of Biomedical Innovation, Health and Nutrition, Tsukuba, Ibaraki, Japan
| | - H Masuyama
- Department of Obstetrics and Gynecology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Kita, Okayama, Japan
| | - J Otsuki
- Department of Applied Animal Science, Graduate School of Environmental, Life, Natural Science and Technology, Okayama University, Kita, Okayama, Japan
- Assisted Reproductive Technology Center, Okayama University, Kita, Okayama, Japan
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8
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Silva BR, Barrozo LG, Nascimento DR, Costa FC, Azevedo VAN, Paulino LRFM, Lopes EPF, Batista ALPS, Aguiar FLN, Peixoto CA, Donato MAM, Rodrigues APR, Silva JRV. Effects of cyclic adenosine monophosphate modulating agents during oocyte pre-maturation and the role of melatonin on in vitro maturation of bovine cumulus-oocyte complexes. Anim Reprod Sci 2023; 257:107327. [PMID: 37696223 DOI: 10.1016/j.anireprosci.2023.107327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 08/16/2023] [Accepted: 09/01/2023] [Indexed: 09/13/2023]
Abstract
This study investigated the effects of cyclic adenosine monophosphate modulating during cumulus-oocyte complexes (COCs) pre-maturation and the role of melatonin on in vitro maturation (IVM) of bovine COCs. In experiment one, COCs were pre-matured for 8 h in control medium or with 3-isobutyl-1-methylxanthine (IBMX) and forskolin, IBMX and C-type natriuretic peptide, c-type natriuretic peptide and forskolin or IBMX, forskolin and c-type natriuretic peptide. Then, meiotic progression was evaluated. In experiment two, COCs were pre-matured, followed by IVM in control medium alone or with 10-6, 10-7 or 10-8 M melatonin. After IVM, chromatin configuration, transzonal projections (TZPs), reactive oxygen species, mitochondrial distribution, ultrastructure and mRNA expression for antioxidant enzymes were evaluated. In experiment 1, COCs pre-matured with both C-type natriuretic peptide and forskolin or C-type natriuretic peptide, forskolin and IBMX had lower meiotic resumption rate when compared to control. Considering that IBMX had not an additional effect to potentiate inhibition of meiotic resumption, a combination of C-type natriuretic peptide and forskolin was chosen. In experiment 2, COCs matured with 10-8 M melatonin had greater rates of meiotic resumption when compared to the other treatments (P < 0.05). The COCs matured with 10-7 or 10-8 M melatonin had greater mitochondrial activity (P < 0.05), while those matured with 10-6 or 10-8 M of melatonin had greater levels of TZPs. Ultrastructure of oocyte and cumulus cells after IVM with melatonin was relatively well preserved. COCs matured with 10-8 M melatonin increased mRNA expression for superoxide dismutase (SOD) and catalase (CAT) (P < 0.05), when compared to non-cultured and pre-matured COCs, respectively. In conclusion, bovine COC pre-maturation with C-type natriuretic peptide and forskolin, followed by IVM with 10-8 M melatonin improves meiotic resumption rates, TZPs, mitochondrial distribution and mRNA expression for SOD and CAT.
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Affiliation(s)
- Bianca R Silva
- Laboratory of Biotechnology and Physiology of Reproduction (LABIREP), Federal University of Ceara, Av. Maurocélio Rocha Ponte 100, Sobral 62041-040, Ceará, Brazil
| | - Laryssa G Barrozo
- Laboratory of Biotechnology and Physiology of Reproduction (LABIREP), Federal University of Ceara, Av. Maurocélio Rocha Ponte 100, Sobral 62041-040, Ceará, Brazil
| | - Danisvânia R Nascimento
- Laboratory of Biotechnology and Physiology of Reproduction (LABIREP), Federal University of Ceara, Av. Maurocélio Rocha Ponte 100, Sobral 62041-040, Ceará, Brazil
| | - Francisco C Costa
- Laboratory of Biotechnology and Physiology of Reproduction (LABIREP), Federal University of Ceara, Av. Maurocélio Rocha Ponte 100, Sobral 62041-040, Ceará, Brazil
| | - Venância A N Azevedo
- Laboratory of Biotechnology and Physiology of Reproduction (LABIREP), Federal University of Ceara, Av. Maurocélio Rocha Ponte 100, Sobral 62041-040, Ceará, Brazil
| | - Laís R F M Paulino
- Laboratory of Biotechnology and Physiology of Reproduction (LABIREP), Federal University of Ceara, Av. Maurocélio Rocha Ponte 100, Sobral 62041-040, Ceará, Brazil
| | - Everton P F Lopes
- Faculty of Veterinary Medicine, Laboratory of Manipulation of Oocytes and Preantral Follicles (LAMOFOPA), State University of Ceará, Fortaleza, Ceará, Brazil
| | - Ana L P S Batista
- Laboratory of Biotechnology and Physiology of Reproduction (LABIREP), Federal University of Ceara, Av. Maurocélio Rocha Ponte 100, Sobral 62041-040, Ceará, Brazil
| | - Francisco L N Aguiar
- Department of Veterinary Medicine, Sousa Campus, Federal Institute of Education, Science and Technology of Paraíba, Sousa, Paraíba, Brazil
| | - Christina A Peixoto
- Laboratory of Ultrastructure, CPqAM/FIOCRUZ, Federal University of Pernambuco, Recife, Pernambuco, Brazil
| | - Mariana A M Donato
- Laboratory of Ultrastructure, CPqAM/FIOCRUZ, Federal University of Pernambuco, Recife, Pernambuco, Brazil
| | - Ana P R Rodrigues
- Faculty of Veterinary Medicine, Laboratory of Manipulation of Oocytes and Preantral Follicles (LAMOFOPA), State University of Ceará, Fortaleza, Ceará, Brazil
| | - José R V Silva
- Laboratory of Biotechnology and Physiology of Reproduction (LABIREP), Federal University of Ceara, Av. Maurocélio Rocha Ponte 100, Sobral 62041-040, Ceará, Brazil.
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9
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Latham KE. Preimplantation embryo gene expression: 56 years of discovery, and counting. Mol Reprod Dev 2023; 90:169-200. [PMID: 36812478 DOI: 10.1002/mrd.23676] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 01/23/2023] [Accepted: 02/08/2023] [Indexed: 02/24/2023]
Abstract
The biology of preimplantation embryo gene expression began 56 years ago with studies of the effects of protein synthesis inhibition and discovery of changes in embryo metabolism and related enzyme activities. The field accelerated rapidly with the emergence of embryo culture systems and progressively evolving methodologies that have allowed early questions to be re-addressed in new ways and in greater detail, leading to deeper understanding and progressively more targeted studies to discover ever more fine details. The advent of technologies for assisted reproduction, preimplantation genetic testing, stem cell manipulations, artificial gametes, and genetic manipulation, particularly in experimental animal models and livestock species, has further elevated the desire to understand preimplantation development in greater detail. The questions that drove enquiry from the earliest years of the field remain drivers of enquiry today. Our understanding of the crucial roles of oocyte-expressed RNA and proteins in early embryos, temporal patterns of embryonic gene expression, and mechanisms controlling embryonic gene expression has increased exponentially over the past five and a half decades as new analytical methods emerged. This review combines early and recent discoveries on gene regulation and expression in mature oocytes and preimplantation stage embryos to provide a comprehensive understanding of preimplantation embryo biology and to anticipate exciting future advances that will build upon and extend what has been discovered so far.
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Affiliation(s)
- Keith E Latham
- Department of Animal Science, Michigan State University, East Lansing, Michigan, USA.,Department of Obstetrics, Gynecology, and Reproductive Biology, Michigan State University, East Lansing, Michigan, USA.,Reproductive and Developmental Sciences Program, Michigan State University, East Lansing, Michigan, USA
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10
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Liu C, Wang M, Yao H, Cui M, Gong X, Wang L, Sui C, Zhang H. Inhibition of oocyte maturation by follicular extracellular vesicles of non-hyperandrogenic PCOS patients requiring IVF. J Clin Endocrinol Metab 2022; 108:1394-1404. [PMID: 36527699 DOI: 10.1210/clinem/dgac733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/21/2021] [Revised: 12/14/2022] [Accepted: 12/14/2022] [Indexed: 12/23/2022]
Abstract
CONTEXT Polycystic ovarian syndrome (PCOS) is one of the most common diseases that contribute to subfertility. Recent evidence showed that oocytes of women with PCOS matured in vitro away from the follicular fluid presented better potentials, whereas the reason remained unclear. OBJECTIVE To investigate whether follicular extracellular vesicles (EVs) of PCOS patients interfere with the quality of oocytes. METHODS Follicular EVs of women with PCOS (PCOS-EVs) and control women (CTRL-EVs) were isolated and determined using western blotting, nanoparticle tracking analysis, and transmission electron microscopy. The two types of EVs were co-cultured with murine germinal vesicle oocytes, respectively. Fluorescence labeled EVs were used to visualize internalization by oocytes. After co-culture, oocyte maturation rates were calculated. Mitochondria distribution and reactive oxygen species (ROS) level were detected in the different groups. Spindle morphology was evaluated using immunofluorescence. Moreover, the expression of catalase (CAT), glutathione synthetase (GSS), and superoxide dismutase (SOD) was determined in the oocytes. RESULTS Both PCOS-EVs and CTRL-EVs are bilayered vesicles, approximately 100-150 nm in size, and enriched in EV-associating protein markers. EVs were internalized by oocytes within one hour. Oocyte maturation rate decreased significantly in the PCOS-EV group compared with the CTRL-EV group; whereas the abnormal mitochondria distribution rate and abnormal spindle rate were significantly increased in the PCOS-EV group. Moreover, PCOS-EVs increased the ROS level and the expression of CAT, GSS, and SOD in the oocytes. CONCLUSIONS PCOS-EVs interfered with oocyte mitochondria and spindles and inhibited oocyte maturation. Moreover, oxidative stress induced by PCOS-EVs might be a potential cause.
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Affiliation(s)
- Chang Liu
- Reproductive Medicine Center, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, People's Republic of China
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology
| | - Meng Wang
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology
| | - Haixia Yao
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology
- Shangrao People's Hospital, Shangrao, China
| | - Mengge Cui
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology
| | - Xueqi Gong
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology
| | - Lan Wang
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology
| | - Cong Sui
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology
| | - Hanwang Zhang
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology
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11
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Ikeda S, Fukasawa H, Mabuchi T, Hirata S. Cytoplasmic streaming induced by intracytoplasmic spindle translocation contributes to developmental competence through mitochondrial distribution in mouse oocytes. F&S SCIENCE 2022; 3:210-216. [PMID: 35661817 DOI: 10.1016/j.xfss.2022.05.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 05/26/2022] [Accepted: 05/26/2022] [Indexed: 06/15/2023]
Abstract
OBJECTIVE To evaluate the developmental competency of mouse metaphase II oocytes and the pattern of mitochondrial positioning through cytoplasmic streaming in mouse metaphase II oocytes. DESIGN We observed cytoplasmic streaming as movement indicated by fluorescently stained mitochondria using a newly developed method in which the spindle is translocated to the opposite site of the oocyte. This method is termed as intracytoplasmic spindle translocation (ICST). SETTING University research laboratory. ANIMALS Female B6D2F1 mice. INTERVENTION(S) None. MAIN OUTCOME MEASURE(S) Fresh oocytes, postovulatory-aged oocytes, and oocytes treated with cytochalasin B were classified based on the presence of cytoplasmic streaming induced by ICST. The pattern of redistributed mitochondria and developmental competence caused by parthenogenetic activation were evaluated in oocytes with or without cytoplasmic streaming. RESULT(S) Induced cytoplasmic streaming occurred in 84% of the fresh oocytes but not in the postovulatory-aged oocytes and the oocytes treated with cytochalasin B. Abnormal mitochondrial aggregation was observed in oocytes in which cytoplasmic streaming was not induced. Furthermore, the developmental competence was significantly lower in oocytes without cytoplasmic streaming. CONCLUSION(S) Cytoplasmic streaming induced by ICST contributes to developmental competence through the redistribution of mitochondria and may be a valuable criterion for predicting early developmental competence in mouse oocytes.
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Affiliation(s)
- Shoko Ikeda
- Department of Obstetrics and Gynecology, Faculty of Medicine, University of Yamanashi, Yamanashi, Japan
| | - Hiroko Fukasawa
- Department of Obstetrics and Gynecology, Faculty of Medicine, University of Yamanashi, Yamanashi, Japan
| | - Tadashi Mabuchi
- Department of Obstetrics and Gynecology, Faculty of Medicine, University of Yamanashi, Yamanashi, Japan
| | - Shuji Hirata
- Department of Obstetrics and Gynecology, Faculty of Medicine, University of Yamanashi, Yamanashi, Japan.
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12
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Yan F, Ouyang Y, Meng T, Zhang H, Yue W, Zhang X, Xue Y, Wang Z, Sun Q. Toxic effects of AZD1208 on mouse oocytes and its possible mechanisms. J Cell Physiol 2022; 237:3661-3670. [DOI: 10.1002/jcp.30835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 05/31/2022] [Accepted: 07/04/2022] [Indexed: 11/09/2022]
Affiliation(s)
- Feng‐Ze Yan
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology Chinese Academy of Sciences Beijing China
- College of Life Science University of Chinese Academy of Science Beijing China
| | - Ying‐Chun Ouyang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology Chinese Academy of Sciences Beijing China
| | - Tie‐Gang Meng
- Fertility Preservation Lab, Guangdong‐Hong Kong Metabolism & Reproductive Medicine Center Guangdong Second Provincial General Hospital Guangzhou China
| | - Hong‐Yong Zhang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology Chinese Academy of Sciences Beijing China
| | - Wei Yue
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology Chinese Academy of Sciences Beijing China
- College of Life Science University of Chinese Academy of Science Beijing China
| | - Xin‐Ran Zhang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology Chinese Academy of Sciences Beijing China
- College of Life Science University of Chinese Academy of Science Beijing China
| | - Yue Xue
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology Chinese Academy of Sciences Beijing China
| | - Zhen‐Bo Wang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology Chinese Academy of Sciences Beijing China
| | - Qing‐Yuan Sun
- Fertility Preservation Lab, Guangdong‐Hong Kong Metabolism & Reproductive Medicine Center Guangdong Second Provincial General Hospital Guangzhou China
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13
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McKeegan PJ, Boardman SF, Wanless AA, Boyd G, Warwick LJ, Lu J, Gnanaprabha K, Picton HM. Intracellular oxygen metabolism during bovine oocyte and preimplantation embryo development. Sci Rep 2021; 11:21245. [PMID: 34711892 PMCID: PMC8553752 DOI: 10.1038/s41598-021-99512-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 08/24/2021] [Indexed: 11/11/2022] Open
Abstract
We report a novel method to profile intrcellular oxygen concentration (icO2) during in vitro mammalian oocyte and preimplantation embryo development using a commercially available multimodal phosphorescent nanosensor (MM2). Abattoir-derived bovine oocytes and embryos were incubated with MM2 in vitro. A series of inhibitors were applied during live-cell multiphoton imaging to record changes in icO2 associated with mitochondrial processes. The uncoupler carbonyl cyanide-p-trifluoromethoxyphenylhydrazone (FCCP) uncouples mitochondrial oxygen consumption to its maximum, while antimycin inhibits complex III to ablate mitochondrial oxygen consumption. Increasing oxygen consumption was expected to reduce icO2 and decreasing oxygen consumption to increase icO2. Use of these inhibitors quantifies how much oxygen is consumed at basal in comparison to the upper and lower limits of mitochondrial function. icO2 measurements were compared to mitochondrial DNA copy number analysed by qPCR. Antimycin treatment increased icO2 for all stages tested, suggesting significant mitochondrial oxygen consumption at basal. icO2 of oocytes and preimplantation embryos were unaffected by FCCP treatment. Inner cell mass icO2 was lower than trophectoderm, perhaps reflecting limitations of diffusion. Mitochondrial DNA copy numbers were similar between stages in the range 0.9-4 × 106 copies and did not correlate with icO2. These results validate the MM2 probe as a sensitive, non-toxic probe of intracellular oxygen concentration in mammalian oocytes and preimplantation embryos.
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Affiliation(s)
- Paul J McKeegan
- Reproduction and Early Development Research Group, Leeds Institute of Cardiovascular and Metabolic Medicine, School of Medicine, University of Leeds, Clarendon Way, Leeds, LS2 9JT, UK.
- Centre for Anatomical and Human Sciences, Hull York Medical School, University of Hull, Hull, HU6 7RX, UK.
| | - Selina F Boardman
- Reproduction and Early Development Research Group, Leeds Institute of Cardiovascular and Metabolic Medicine, School of Medicine, University of Leeds, Clarendon Way, Leeds, LS2 9JT, UK
- CARE Fertility, Manchester, England, UK
| | - Amy A Wanless
- Reproduction and Early Development Research Group, Leeds Institute of Cardiovascular and Metabolic Medicine, School of Medicine, University of Leeds, Clarendon Way, Leeds, LS2 9JT, UK
- Assisted Conception Unit, Ninewells Hospital, Dundee, Scotland, UK
| | - Grace Boyd
- Reproduction and Early Development Research Group, Leeds Institute of Cardiovascular and Metabolic Medicine, School of Medicine, University of Leeds, Clarendon Way, Leeds, LS2 9JT, UK
- Department of Biological Sciences, University of York, Wentworth Way, York, YO10 5DD, England, UK
| | - Laura J Warwick
- Reproduction and Early Development Research Group, Leeds Institute of Cardiovascular and Metabolic Medicine, School of Medicine, University of Leeds, Clarendon Way, Leeds, LS2 9JT, UK
- St James's University Hospital, Beckett Street, Leeds, LS9 7TF, England, UK
| | - Jianping Lu
- Reproduction and Early Development Research Group, Leeds Institute of Cardiovascular and Metabolic Medicine, School of Medicine, University of Leeds, Clarendon Way, Leeds, LS2 9JT, UK
| | - Keerthi Gnanaprabha
- Reproduction and Early Development Research Group, Leeds Institute of Cardiovascular and Metabolic Medicine, School of Medicine, University of Leeds, Clarendon Way, Leeds, LS2 9JT, UK
- GCRM Fertility, 21 Fifty Pitches Way, Glasgow, G51 4FD, Scotland, UK
| | - Helen M Picton
- Reproduction and Early Development Research Group, Leeds Institute of Cardiovascular and Metabolic Medicine, School of Medicine, University of Leeds, Clarendon Way, Leeds, LS2 9JT, UK
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14
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Liu H, Chen H. The effects of thirdhand smoke on reproductive health. J Appl Toxicol 2021; 42:172-179. [PMID: 34462936 DOI: 10.1002/jat.4227] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 07/26/2021] [Accepted: 07/28/2021] [Indexed: 12/20/2022]
Abstract
Tobacco smoke is an environmental pollutant that can cause follicle destruction and oocyte dysfunction. Thirdhand smoke (THS) is residual tobacco smoke existing in the environment long after cigarettes have been extinguished, which can react with other environmental compounds to produce secondary pollutants. THS contains a variety of toxic and harmful chemicals, such as nicotine and 1-(N-methyl-N-nitrosamino)-1-(3-pyridinyl)-4-butanal (NNA), a logical biomarker of THS exposure. The health hazards of THS exposure and its components have been researched in recent years. In this review, we have summarized research progress on the effects of THS exposure on organs in mice and humans especially on the reproductive system. This review may help evaluate the health risks of THS, in particular reproduction and offspring health. We hope this review will guide public health education on the dangers of THS exposure and promotion of healthy living habits.
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Affiliation(s)
- Huage Liu
- Institute of Reproductive Medicine, Nantong University, Nantong, China
| | - Hao Chen
- Institute of Reproductive Medicine, Nantong University, Nantong, China
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15
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Serra E, Gadau SD, Leoni GG, Naitana S, Succu S. Seasonal Effect on Developmental Competence, Oxidative Status and Tubulin Assessment of Prepubertal Ovine Oocyte. Animals (Basel) 2021; 11:ani11071886. [PMID: 34202918 PMCID: PMC8300209 DOI: 10.3390/ani11071886] [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: 04/30/2021] [Revised: 06/17/2021] [Accepted: 06/21/2021] [Indexed: 11/16/2022] Open
Abstract
Simple Summary Oocytes obtained from the ovaries of slaughtered prepubertal ewes can be incorporated into an in vitro embryo production system. The collection of this material is possible at two different times of the year, spring and autumn. The first period is linked to the natural reproductive cycle of the sheep. The second, on the other hand, is linked to the manipulation of the reproductive seasonality which allows the oestrus cycle to be controlled artificially. The analysis highlighted that the collection season influences oocytes quality from prepubertal donors in terms of improved energetic and oxidative status, microtubular organization, and developmental competence in oocytes recovered in spring. Data obtained underline that oocytes seem to be genetically and evolutionarily programmed to give their best in spring, this being the most favorable period for newborns. Abstract The reproductive seasonality of domestic animals is often manipulated in order to have more reproductive periods for commercial purposes related to the production of milk and meat. It is scientifically proven that such an alteration of the reproductive activity in sheep entails a deterioration in oocyte quality, leading to an inability to generate embryos. Since oocytes obtained from prepubertal ewes can be incorporated into an in vitro embryo production system and considering that their quality is crucial to the success of in vitro procedures, the aim of this work was to investigate the effect of seasons on the quality of prepubertal ovine oocytes collected in autumn and spring. Ovaries were collected from a local slaughterhouse from 30–40-day-old suckling lambs during both seasons. Following 24 h of in vitro maturation, oocytes developmental competence, reactive oxygen species (ROS) intracellular levels, and mitochondrial activity were evaluated, and a tubulin assessment was performed. The results on embryo production, as a percentage of first divisions and number of blastocysts obtained, were significantly higher in oocytes collected in the spring. Mitochondrial activity in oocytes was higher, and ROS production significantly lower, in spring than in autumn. Tubulin PTMs (tyrosinated and acetylated α-tubulin) showed a higher immunoreactivity in oocytes collected in spring compared with autumn sampling. Our data showed that seasons may affect the developmental competence, energetic status, and tubulin assessment of oocytes recovered from prepubertal ewes. Therefore, special care should be taken when choosing the period of the year for prepuberal ovine oocytes collection aimed at in vitro embryo reproduction programs.
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16
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Bebbere D, Ulbrich SE, Giller K, Zakhartchenko V, Reichenbach HD, Reichenbach M, Verma PJ, Wolf E, Ledda S, Hiendleder S. Mitochondrial DNA Depletion in Granulosa Cell Derived Nuclear Transfer Tissues. Front Cell Dev Biol 2021; 9:664099. [PMID: 34124044 PMCID: PMC8194821 DOI: 10.3389/fcell.2021.664099] [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: 02/04/2021] [Accepted: 03/31/2021] [Indexed: 12/14/2022] Open
Abstract
Somatic cell nuclear transfer (SCNT) is a key technology with broad applications that range from production of cloned farm animals to derivation of patient-matched stem cells or production of humanized animal organs for xenotransplantation. However, effects of aberrant epigenetic reprogramming on gene expression compromise cell and organ phenotype, resulting in low success rate of SCNT. Standard SCNT procedures include enucleation of recipient oocytes before the nuclear donor cell is introduced. Enucleation removes not only the spindle apparatus and chromosomes of the oocyte but also the perinuclear, mitochondria rich, ooplasm. Here, we use a Bos taurus SCNT model with in vitro fertilized (IVF) and in vivo conceived controls to demonstrate a ∼50% reduction in mitochondrial DNA (mtDNA) in the liver and skeletal muscle, but not the brain, of SCNT fetuses at day 80 of gestation. In the muscle, we also observed significantly reduced transcript abundances of mtDNA-encoded subunits of the respiratory chain. Importantly, mtDNA content and mtDNA transcript abundances correlate with hepatomegaly and muscle hypertrophy of SCNT fetuses. Expression of selected nuclear-encoded genes pivotal for mtDNA replication was similar to controls, arguing against an indirect epigenetic nuclear reprogramming effect on mtDNA amount. We conclude that mtDNA depletion is a major signature of perturbations after SCNT. We further propose that mitochondrial perturbation in interaction with incomplete nuclear reprogramming drives abnormal epigenetic features and correlated phenotypes, a concept supported by previously reported effects of mtDNA depletion on the epigenome and the pleiotropic phenotypic effects of mtDNA depletion in humans. This provides a novel perspective on the reprogramming process and opens new avenues to improve SCNT protocols for healthy embryo and tissue development.
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Affiliation(s)
- Daniela Bebbere
- Department of Veterinary Medicine, University of Sassari, Sassari, Italy.,Molecular Animal Breeding and Biotechnology, Gene Center and Department of Veterinary Science, LMU Munich, Munich, Germany
| | - Susanne E Ulbrich
- ETH Zürich, Animal Physiology, Institute of Agricultural Sciences, Zurich, Switzerland
| | - Katrin Giller
- ETH Zürich, Animal Physiology, Institute of Agricultural Sciences, Zurich, Switzerland
| | - Valeri Zakhartchenko
- Molecular Animal Breeding and Biotechnology, Gene Center and Department of Veterinary Science, LMU Munich, Munich, Germany
| | - Horst-Dieter Reichenbach
- Molecular Animal Breeding and Biotechnology, Gene Center and Department of Veterinary Science, LMU Munich, Munich, Germany.,Bavarian State Research Center for Agriculture, Institute of Animal Breeding, Grub, Germany
| | - Myriam Reichenbach
- Molecular Animal Breeding and Biotechnology, Gene Center and Department of Veterinary Science, LMU Munich, Munich, Germany.,Bayern-Genetik GmbH, Grub, Germany
| | - Paul J Verma
- Livestock Sciences, South Australian Research and Development Institute, Roseworthy, SA, Australia.,School of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy, SA, Australia
| | - Eckhard Wolf
- Molecular Animal Breeding and Biotechnology, Gene Center and Department of Veterinary Science, LMU Munich, Munich, Germany
| | - Sergio Ledda
- Department of Veterinary Medicine, University of Sassari, Sassari, Italy
| | - Stefan Hiendleder
- Molecular Animal Breeding and Biotechnology, Gene Center and Department of Veterinary Science, LMU Munich, Munich, Germany.,School of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy, SA, Australia.,Davies Research Centre, School of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy, SA, Australia.,Robinson Research Institute, The University of Adelaide, Adelaide, SA, Australia
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17
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Ferreira-Silva JC, Oliveira Silva RL, Travassos Vieira JI, Silva JB, Tavares LS, Cavalcante Silva FA, Nunes Pena EP, Chaves MS, Moura MT, Junior TC, Benko-Iseppon AM, Figueirêdo Freitas VJ, Lemos Oliveira MA. Evaluation of quality and gene expression of goat embryos produced in vivo and in vitro after cryopreservation. Cryobiology 2021; 101:115-124. [PMID: 33964298 DOI: 10.1016/j.cryobiol.2021.04.008] [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: 10/06/2020] [Revised: 04/22/2021] [Accepted: 04/23/2021] [Indexed: 11/26/2022]
Abstract
In the present study, we aimed to identify morphological and molecular changes of in vivo and in vitro-produced goat embryos submitted to cryopreservation. In vivo embryos were recovered by transcervical technique from superovulated goats, whereas in vitro produced embryos were produced from ovaries collected at a slaughterhouse. Embryos were frozen by two-steps slow freezing method, which is defined as freezing to -32 °C followed by transfer to liquid nitrogen. Morphological evaluation of embryos was carried out by assessing blastocoel re-expansion rate and the total number of blastomeres. The expression profile of candidate genes related to thermal and oxidative stress, apoptosis, epigenetic, and implantation control was measured using RT-qPCR based SYBR Green system. In silico analyses were performed to identify conserved genes in goat species and protein-protein interaction networks were created. In vivo-produced embryos showed greater blastocoel re-expansion and more blastomere cells (P < 0.05). The expression level of CTP2 and HSP90 genes from in vitro cryopreserved embryos was higher than their in vivo counterparts. Unlikely, no significant difference was observed in the transcription level of SOD gene between groups. The high similarity of CPT2 and HSP90 proteins to their orthologs among mammals indicates that they share conserved functions. In summary, cryopreservation negatively affects the morphology and viability of goat embryos produced in vitro and changes the CPT2 and HSP90 gene expression likely in response to the in vitro production process.
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Affiliation(s)
- José Carlos Ferreira-Silva
- Laboratory of Reproductive Biotechniques, Department of Veterinary Medicine, Federal Rural University of Pernambuco, Brazil.
| | - Roberta Lane Oliveira Silva
- Laboratory of Plant Genetics and Biotechnology, Department of Genetics, Federal University of Pernambuco, Brazil.
| | - Joane Isis Travassos Vieira
- Laboratory of Reproductive Biotechniques, Department of Veterinary Medicine, Federal Rural University of Pernambuco, Brazil.
| | - Jéssica Barboza Silva
- Laboratory of Plant Genetics and Biotechnology, Department of Genetics, Federal University of Pernambuco, Brazil.
| | - Lethicia Souza Tavares
- Laboratory of Plant Genetics and Biotechnology, Department of Genetics, Federal University of Pernambuco, Brazil.
| | | | - Elton Pedro Nunes Pena
- Laboratory of Plant Genomics and Proteomics, Department of Genetics, Federal University of Pernambuco, Brazil.
| | - Maiana Silva Chaves
- Laboratory of Reproductive Biotechniques, Department of Veterinary Medicine, Federal Rural University of Pernambuco, Brazil. maiana-@hotmail.com
| | - Marcelo Tigre Moura
- Laboratory of Reproductive Biotechniques, Department of Veterinary Medicine, Federal Rural University of Pernambuco, Brazil.
| | - Tercilio Calsa Junior
- Laboratory of Plant Genomics and Proteomics, Department of Genetics, Federal University of Pernambuco, Brazil.
| | - Ana Maria Benko-Iseppon
- Laboratory of Plant Genetics and Biotechnology, Department of Genetics, Federal University of Pernambuco, Brazil.
| | | | - Marcos Antonio Lemos Oliveira
- Laboratory of Reproductive Biotechniques, Department of Veterinary Medicine, Federal Rural University of Pernambuco, Brazil.
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18
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Xingzhu D, Qingrui Z, Keren C, Yuxi L, Yunpeng H, Shien Z, Xiangwei F. Cryopreservation of Porcine Embryos: Recent Updates and Progress. Biopreserv Biobank 2021; 19:210-218. [PMID: 33625892 DOI: 10.1089/bio.2020.0074] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Cryopreservation of embryos is important for long-distance embryo transfer and conservation of genetic resources. Porcine research is important for animal husbandry and biomedical research. However, porcine embryos are difficult to cryopreserve because of their high cytoplasmic lipid content and sensitivity to chilling stress. Vitrification is more efficient than slow freezing, and vitrification is mostly used in embryo cryopreservation. So far, the vitrification process of porcine embryos has been continuously improved, resulting in improved survival rates of warmed embryos and farrowing rates after the transplant procedure. It is worth noting that automatic vitrification has made great progress, which is expected to promote the standardization and application of vitrification. In this article, the vitrification process of porcine embryos at the blastula stage and early development stages is reviewed in detail. In addition, the efficiency of different vitrification systems was compared. In addition, we summarize technology that can improve the survival rate of cryopreserved porcine embryos, such as delipidation methods (including physical delipidation and chemical delipidation) and medium improvements (including chemically defined media and adding antioxidants). Meanwhile, gene expression changes during cryopreservation are also elaborated.
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Affiliation(s)
- Du Xingzhu
- National Engineering Laboratory for Animal Breeding, Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Zhuan Qingrui
- National Engineering Laboratory for Animal Breeding, Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Cheng Keren
- Department of Biology, University of Texas at San Antonio, San Antonio, Texas, USA
| | - Luo Yuxi
- National Engineering Laboratory for Animal Breeding, Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Hou Yunpeng
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Zhu Shien
- National Engineering Laboratory for Animal Breeding, Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Fu Xiangwei
- National Engineering Laboratory for Animal Breeding, Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, Beijing, China
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19
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Roth Z. Heat stress reduces maturation and developmental capacity in bovine oocytes. Reprod Fertil Dev 2021; 33:66-75. [PMID: 38769677 DOI: 10.1071/rd20213] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/22/2024] Open
Abstract
The ovarian pool of follicles, and their enclosed oocytes, is highly sensitive to hyperthermia. Heat-induced changes in small antral follicles can later manifest as impaired follicle development and compromised competence of the enclosed oocytes to undergo maturation, fertilisation and further development into an embryo. This review describes the main changes documented so far that underlie the oocyte damage. The review discusses some cellular and molecular mechanisms by which heat stress compromises oocyte developmental competence, such as impairment of nuclear and cytoplasmic maturation and mitochondrial function, changes in the expression of both nuclear and mitochondrial transcripts and the induction of apoptosis. The review emphasises that although the oocyte is exposed to heat stress, changes are also evident in the developed embryo. Moreover, the effect of heat stress is not limited to the summer; it carries over to the cold autumn, as manifest by impaired steroid production, low oocyte competence and reduced fertility. The spontaneous recovery of oocytes from the end of the summer through the autumn until the beginning of winter suggests that only subpopulations of follicles, rather than the entire ovarian reserve, are damaged upon heat exposure.
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Affiliation(s)
- Zvi Roth
- Department of Animal Sciences, Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University, POB 12 Rehovot, 76100, Israel
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20
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García-Martínez T, Vendrell-Flotats M, Martínez-Rodero I, Ordóñez-León EA, Álvarez-Rodríguez M, López-Béjar M, Yeste M, Mogas T. Glutathione Ethyl Ester Protects In Vitro -Maturing Bovine Oocytes against Oxidative Stress Induced by Subsequent Vitrification/Warming. Int J Mol Sci 2020; 21:ijms21207547. [PMID: 33066129 PMCID: PMC7588878 DOI: 10.3390/ijms21207547] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 09/30/2020] [Accepted: 10/08/2020] [Indexed: 12/21/2022] Open
Abstract
This study aimed to examine whether the addition of glutathione ethyl ester (GSH-OEt) to the in vitro maturation (IVM) medium would improve the resilience of bovine oocytes to withstand vitrification. The effects of GSH-OEt on spindle morphology, levels of reactive oxygen species (ROS), mitochondrial activity and distribution, and embryo developmental potential were assessed together with the expression of genes with a role in apoptosis (BAX, BCL2), oxidative-stress pathways (GPX1, SOD1), water channels (AQP3), implantation (IFN-τ) and gap junctions (CX43) in oocytes and their derived blastocysts. Vitrification gave rise to abnormal spindle microtubule configurations and elevated ROS levels. Supplementation of IVM medium with GSH-OEt before vitrification preserved mitochondrial distribution pattern and diminished both cytoplasmic and mitochondrial ROS contents and percentages of embryos developing beyond the 8-cell stage were similar to those recorded in fresh non-vitrified oocytes. Although not significantly different from control vitrified oocytes, vitrified oocytes after GSH-OEt treatment gave rise to similar day 8-blastocyst and hatching rates to fresh non-vitrified oocytes. No effects of GSH-OEt supplementation were noted on the targeted gene expression of oocytes and derived blastocysts, with the exception of GPX1, AQP3 and CX43 in derived blastocysts. The addition of GSH-OEt to the IVM medium before vitrification may be beneficial for embryo development presumably as the consequence of additional anti-oxidant protection during IVM.
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Affiliation(s)
- Tania García-Martínez
- Department of Animal Medicine and Surgery, Autonomous University of Barcelona, ES-08193 Cerdanyola del Vallès, Spain; (T.G.-M.); (M.V.-F.); (I.M.-R.); (E.A.O.-L.)
| | - Meritxell Vendrell-Flotats
- Department of Animal Medicine and Surgery, Autonomous University of Barcelona, ES-08193 Cerdanyola del Vallès, Spain; (T.G.-M.); (M.V.-F.); (I.M.-R.); (E.A.O.-L.)
- Department of Animal Health and Anatomy, Autonomous University of Barcelona, ES-08193 Cerdanyola del Vallès, Spain; (M.Á.-R.); (M.L.-B.)
| | - Iris Martínez-Rodero
- Department of Animal Medicine and Surgery, Autonomous University of Barcelona, ES-08193 Cerdanyola del Vallès, Spain; (T.G.-M.); (M.V.-F.); (I.M.-R.); (E.A.O.-L.)
| | - Erika Alina Ordóñez-León
- Department of Animal Medicine and Surgery, Autonomous University of Barcelona, ES-08193 Cerdanyola del Vallès, Spain; (T.G.-M.); (M.V.-F.); (I.M.-R.); (E.A.O.-L.)
- Grupo InVitro, Tabasco 86040, Mexico
| | - Manuel Álvarez-Rodríguez
- Department of Animal Health and Anatomy, Autonomous University of Barcelona, ES-08193 Cerdanyola del Vallès, Spain; (M.Á.-R.); (M.L.-B.)
| | - Manel López-Béjar
- Department of Animal Health and Anatomy, Autonomous University of Barcelona, ES-08193 Cerdanyola del Vallès, Spain; (M.Á.-R.); (M.L.-B.)
- College of Veterinary Medicine, Western University of Health Sciences, Pomona, CA 91766, USA
| | - Marc Yeste
- Department of Biology, Institute of Food and Agricultural Technology, University of Girona, ES-17004 Girona, Spain;
| | - Teresa Mogas
- Department of Animal Medicine and Surgery, Autonomous University of Barcelona, ES-08193 Cerdanyola del Vallès, Spain; (T.G.-M.); (M.V.-F.); (I.M.-R.); (E.A.O.-L.)
- Correspondence: ; Tel.: +34-696-64-51-27
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Effect of Triclosan Exposure on Developmental Competence in Parthenogenetic Porcine Embryo during Preimplantation. Int J Mol Sci 2020; 21:ijms21165790. [PMID: 32806749 PMCID: PMC7461051 DOI: 10.3390/ijms21165790] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 08/06/2020] [Accepted: 08/10/2020] [Indexed: 01/05/2023] Open
Abstract
Triclosan (TCS) is included in various healthcare products because of its antimicrobial activity; therefore, many humans are exposed to TCS daily. While detrimental effects of TCS exposure have been reported in various species and cell types, the effects of TCS exposure on early embryonic development are largely unknown. The aim of this study was to determine if TCS exerts toxic effects during early embryonic development using porcine parthenogenetic embryos in vitro. Porcine parthenogenetic embryos were cultured in in vitro culture medium with 50 or 100 µM TCS for 6 days. Developmental parameters including cleavage and blastocyst formation rates, developmental kinetics, and the number of blastomeres were assessed. To determine the toxic effects of TCS, apoptosis, oxidative stress, and mitochondrial dysfunction were assessed. TCS exposure resulted in a significant decrease in 2-cell rate and blastocyst formation rate, as well as number of blastomeres, but not in the cleavage rate. TCS also increased the number of apoptotic blastomeres and the production of reactive oxygen species. Finally, TCS treatment resulted in a diffuse distribution of mitochondria and decreased the mitochondrial membrane potential. Our results showed that TCS exposure impaired porcine early embryonic development by inducing DNA damage, oxidative stress, and mitochondrial dysfunction.
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F. Sobrinho C, Knackfuss F, Souza P, Torres T, Ramos A, Dias L, Ferreira J, Pires I. Avaliação da técnica de vitrificação de ovários de camundongos da linhagem B6D2F1, pertencentes ao Instituto de Ciência e Tecnologia em Biomodelos - ICTB/Fiocruz-RJ. ARQ BRAS MED VET ZOO 2020. [DOI: 10.1590/1678-4162-10935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
RESUMO Objetivou-se testar a vitrificação de ovários de camundongos do ICTB/Fiocruz. Inicialmente, fez-se coleta e maturação in vitro dos oócitos de ovários a fresco e vitrificados, bem como avaliação de estruturas no cultivo embrionário, pós-fertilização in vitro. Fêmeas B6D2F1 foram eutanasiadas para remoção dos ovários (n=60) e divididas em três grupos: grupo 1 (n=30 animais) - oócito de ovários vitrificados, maturados e fertilizados in vitro (120 fragmentos); grupo 2 (n=15) (controle 1) - oócitos coletados a fresco, maturados e fertilizados in vitro; e grupo 3 (n=15) (controle 2) - oócitos maturados in vivo e fertilizados in vitro. A técnica foi verificada no desenvolvimento embrionário in vitro, que foi avaliado pelo teste de qui-quadrado (BioStat 5.0). Recuperaram-se 123, 224 e 328 oócitos nos G1, G2 e G3, respectivamente. Observaram-se diferenças significativas nas taxas de clivagem às 24 horas (embriões ≥ 2 células) entre G1 (8%) e G2 (32%) (P<0,1) e G1 e G3 (49%) (P<0,05), mas não entre G2 e G3 (P>0,05). Para blastocistos, às 96 horas, os grupos G1, G2 e G3 apresentaram, respectivamente, 6%, 11% e 46%, diferindo significativamente entre eles (P<0,05). A vitrificação de ovários, a maturação oocitária e a fertilização in vitro são alternativas para a produção de embriões de camundongos in vitro.
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Abstract
As women delay childbearing because of demographic and socioeconomic trends, reproductive aging and ensuing ovarian dysfunction become increasingly more prevalent causes of infertility. Age-related decline in fertility is characterized by both quantitative and qualitative deterioration of the ovarian reserve. Importantly, disorders of aging are frequently associated with mitochondrial dysfunction, as are impaired oogenesis and embryogenesis. Ongoing research explores the role of mitochondrial dysfunction in ovarian aging, and potential ways to exploit mitochondrial mechanisms to slow down or reverse age-related changes in female gonads.
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Affiliation(s)
| | - Emre Seli
- Yale School of Medicine, New Haven, Connecticut
- IVIRMA New Jersey, Basking Ridge, New Jersey
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Yang L, Wang Q, Cui M, Li Q, Mu S, Zhao Z. Effect of Melatonin on the In Vitro Maturation of Porcine Oocytes, Development of Parthenogenetically Activated Embryos, and Expression of Genes Related to the Oocyte Developmental Capability. Animals (Basel) 2020; 10:ani10020209. [PMID: 32012669 PMCID: PMC7070577 DOI: 10.3390/ani10020209] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 01/23/2020] [Accepted: 01/24/2020] [Indexed: 01/10/2023] Open
Abstract
Simple Summary Exogenous melatonin has beneficial effects on improving cumulus oophorus expansion; mitochondrial distribution; intracellular level of glutathione; and first polar body extrusion rate of porcine oocytes derived from in vitro maturation. Moreover; melatonin supplementation increases relative abundances of BMP15 and CAT mRNA; and decreases intracellular levels of reactive oxygen species; and expression values of P53 and BAX genes; which are related to in vitro development of porcine oocytes. Abstract Melatonin treatment can improve quality and in vitro development of porcine oocytes, but the mechanism of improving quality and developmental competence is not fully understood. In this study, porcine cumulus–oocyte complexes were cultured in TCM199 medium with non-treated (control), 10−5 M luzindole (melatonin receptor antagonist), 10−5 M melatonin, and melatonin + luzindole during in vitro maturation, and parthenogenetically activated (PA) embryos were treated with nothing (control), or 10−5 M melatonin. Cumulus oophorus expansion, oocyte survival rate, first polar body extrusion rate, mitochondrial distribution, and intracellular levels of reactive oxygen species (ROS) and glutathione of oocytes, and cleavage rate and blastocyst rate of the PA embryos were assessed. In addition, expression of growth differentiation factor 9 (GDF9), tumor protein p53 (P53), BCL2 associated X protein (BAX), catalase (CAT), and bone morphogenetic protein 15 (BMP15) were analyzed by real-time quantitative PCR. The results revealed that melatonin treatment not only improved the first polar body extrusion rate and cumulus expansion of oocytes via melatonin receptors, but also enhanced the rates of cleavage and blastocyst formation of PA embryos. Additionally, melatonin treatment significantly increased intraooplasmic level of glutathione independently of melatonin receptors. Furthermore, melatonin supplementation not only significantly enhanced mitochondrial distribution and relative abundances of BMP15 and CAT mRNA, but also decreased intracellular level of ROS and relative abundances of P53 and BAX mRNA of the oocytes. In conclusion, melatonin enhanced the quality and in vitro development of porcine oocytes, which may be related to antioxidant and anti-apoptotic mechanisms.
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Affiliation(s)
- Ling Yang
- College of Life Sciences and Food Engineering, Hebei University of Engineering, Handan 056021, China; (L.Y.); (Q.W.); (Z.Z.)
| | - Qingkai Wang
- College of Life Sciences and Food Engineering, Hebei University of Engineering, Handan 056021, China; (L.Y.); (Q.W.); (Z.Z.)
- Animal Husbandry and Veterinary Research Institute of Tianjin, Tianjin 300412, China; (Q.L.); (S.M.)
| | - Maosheng Cui
- Animal Husbandry and Veterinary Research Institute of Tianjin, Tianjin 300412, China; (Q.L.); (S.M.)
- Correspondence:
| | - Qianjun Li
- Animal Husbandry and Veterinary Research Institute of Tianjin, Tianjin 300412, China; (Q.L.); (S.M.)
| | - Shuqin Mu
- Animal Husbandry and Veterinary Research Institute of Tianjin, Tianjin 300412, China; (Q.L.); (S.M.)
| | - Zimo Zhao
- College of Life Sciences and Food Engineering, Hebei University of Engineering, Handan 056021, China; (L.Y.); (Q.W.); (Z.Z.)
- Animal Husbandry and Veterinary Research Institute of Tianjin, Tianjin 300412, China; (Q.L.); (S.M.)
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Rao A, Nayak G, Kumari S, Kalthur SG, Mutalik SP, Mutalik S, Adiga SK, Kalthur G. Exposure to first line anti-tuberculosis drugs in prepubertal age reduces the quality and functional competence of spermatozoa and oocytes in Swiss albino mice. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2020; 73:103292. [PMID: 31765964 DOI: 10.1016/j.etap.2019.103292] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 10/14/2019] [Accepted: 10/24/2019] [Indexed: 06/10/2023]
Abstract
Prepubertal Swiss albino mice of both sex were administered with first-line anti-tuberculosis drugs (ATDs) viz; rifampicin, isoniazid, pyrazinamide, streptomycin and ethambutol intraperitoneally, for 4 weeks. Two weeks after the completion of treatment, male mice were sacrificed to collect caudal spermatozoa and female mice were superovulated with pregnant mare serum gonadotropin (PMSG) and human chorionic gonadotropin (hCG) to collect metaphase II (MII) oocytes from oviduct. Administration of ATDs not only decreased the count, motility and, nuclear maturity and also, increased the head abnormalities, mitochondrial damage and DNA damage in epididymal spermatozoa. Reduction in number of ovulated oocytes, increased degeneration rate and altered distribution pattern of cytoplasmic organelles was observed in oocytes of female mice. Presence of ATDs in in vitro maturation (IVM) medium increased abnormalities in meiotic resulted in abnormal spindle organization (except ethambutol) without affecting nuclear maturation. In conclusion, the result of this study indicates that ATDs have considerable adverse effects on the functional competence of male and female gametes, however, with varied degree of toxicity.
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Affiliation(s)
- Arpitha Rao
- Department of Clinical Embryology, Manipal 576104, Karnataka, India
| | - Guruprasad Nayak
- Department of Clinical Embryology, Manipal 576104, Karnataka, India
| | - Sandhya Kumari
- Department of Clinical Embryology, Manipal 576104, Karnataka, India
| | | | - Sadhana P Mutalik
- Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
| | - Srinivas Mutalik
- Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
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Sanchez T, Venturas M, Aghvami SA, Yang X, Fraden S, Sakkas D, Needleman DJ. Combined noninvasive metabolic and spindle imaging as potential tools for embryo and oocyte assessment. Hum Reprod 2019; 34:2349-2361. [PMID: 31812992 PMCID: PMC6936724 DOI: 10.1093/humrep/dez210] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Revised: 08/30/2019] [Accepted: 09/06/2019] [Indexed: 11/15/2022] Open
Abstract
STUDY QUESTION Is the combined use of fluorescence lifetime imaging microscopy (FLIM)-based metabolic imaging and second harmonic generation (SHG) spindle imaging a feasible and safe approach for noninvasive embryo assessment? SUMMARY ANSWER Metabolic imaging can sensitively detect meaningful metabolic changes in embryos, SHG produces high-quality images of spindles and the methods do not significantly impair embryo viability. WHAT IS KNOWN ALREADY Proper metabolism is essential for embryo viability. Metabolic imaging is a well-tested method for measuring metabolism of cells and tissues, but it is unclear if it is sensitive enough and safe enough for use in embryo assessment. STUDY DESIGN, SIZE, DURATION This study consisted of time-course experiments and control versus treatment experiments. We monitored the metabolism of 25 mouse oocytes with a noninvasive metabolic imaging system while exposing them to oxamate (cytoplasmic lactate dehydrogenase inhibitor) and rotenone (mitochondrial oxidative phosphorylation inhibitor) in series. Mouse embryos (n = 39) were measured every 2 h from the one-cell stage to blastocyst in order to characterize metabolic changes occurring during pre-implantation development. To assess the safety of FLIM illumination, n = 144 illuminated embryos were implanted into n = 12 mice, and n = 108 nonilluminated embryos were implanted into n = 9 mice. PARTICIPANTS/MATERIALS, SETTING, METHODS Experiments were performed in mouse embryos and oocytes. Samples were monitored with noninvasive, FLIM-based metabolic imaging of nicotinamide adenine dinucleotide (NADH) and flavin adenine dinucleotide (FAD) autofluorescence. Between NADH cytoplasm, NADH mitochondria and FAD mitochondria, a single metabolic measurement produces up to 12 quantitative parameters for characterizing the metabolic state of an embryo. For safety experiments, live birth rates and pup weights (mean ± SEM) were used as endpoints. For all test conditions, the level of significance was set at P < 0.05. MAIN RESULTS AND THE ROLE OF CHANCE Measured FLIM parameters were highly sensitive to metabolic changes due to both metabolic perturbations and embryo development. For oocytes, metabolic parameter values were compared before and after exposure to oxamate and rotenone. The metabolic measurements provided a basis for complete separation of the data sets. For embryos, metabolic parameter values were compared between the first division and morula stages, morula and blastocyst and first division and blastocyst. The metabolic measurements again completely separated the data sets. Exposure of embryos to excessive illumination dosages (24 measurements) had no significant effect on live birth rate (5.1 ± 0.94 pups/mouse for illuminated group; 5.7 ± 1.74 pups/mouse for control group) or pup weights (1.88 ± 0.10 g for illuminated group; 1.89 ± 0.11 g for control group). LIMITATIONS, REASONS FOR CAUTION The study was performed using a mouse model, so conclusions concerning sensitivity and safety may not generalize to human embryos. A limitation of the live birth data is also that although cages were routinely monitored, we could not preclude that some runt pups may have been eaten. WIDER IMPLICATIONS OF THE FINDINGS Promising proof-of-concept results demonstrate that FLIM with SHG provide detailed biological information that may be valuable for the assessment of embryo and oocyte quality. Live birth experiments support the method's safety, arguing for further studies of the clinical utility of these techniques. STUDY FUNDING/COMPETING INTEREST(S) Supported by the Blavatnik Biomedical Accelerator Grant at Harvard University and by the Harvard Catalyst/The Harvard Clinical and Translational Science Center (National Institutes of Health Award UL1 TR001102), by NSF grants DMR-0820484 and PFI-TT-1827309 and by NIH grant R01HD092550-01. T.S. was supported by a National Science Foundation Postdoctoral Research Fellowship in Biology grant (1308878). S.F. and S.A. were supported by NSF MRSEC DMR-1420382. Becker and Hickl GmbH sponsored the research with the loaning of equipment for FLIM. T.S. and D.N. are cofounders and shareholders of LuminOva, Inc., and co-hold patents (US20150346100A1 and US20170039415A1) for metabolic imaging methods. D.S. is on the scientific advisory board for Cooper Surgical and has stock options with LuminOva, Inc.
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Affiliation(s)
- Tim Sanchez
- Department of Molecular and Cellular Biology and John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138
| | - Marta Venturas
- Department of Molecular and Cellular Biology and John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138
- Departament de Biologia Cellular, Fisiologia i Immunologia, Universitat Autonoma de Barcelona
| | - S Ali Aghvami
- Department of Physics, Brandeis University, Waltham, MA, 02453
| | - Xingbo Yang
- Department of Molecular and Cellular Biology and John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138
| | - Seth Fraden
- Department of Physics, Brandeis University, Waltham, MA, 02453
| | - Denny Sakkas
- Boston IVF, 130 Second Avenue, Waltham, MA 02451
| | - Daniel J Needleman
- Department of Molecular and Cellular Biology and John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138
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Bonetti TC, Haddad DC, Domingues TS, Alegretti JR, Motta ELA, Seeley K, Silva ID. Expressed proteins and activated pathways in conditioned embryo culture media from IVF patients are diverse according to infertility factors. JBRA Assist Reprod 2019; 23:352-360. [PMID: 31251011 PMCID: PMC6798601 DOI: 10.5935/1518-0557.20190039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
OBJECTIVE Given that the embryo culture medium secretome reflects the embryo development, we hypothesize that protein profiles are affected according to infertility factors, which can be responsible for detrimental embryonic developmental competence. The aim of this study was to screen the protein profile of conditioned embryo culture media in patients presenting deep infiltrating endometriosis (ENDO) and polycystic ovarian syndrome (PCOS) undergoing IVF, by proteomics approaches. The control group was constituted by tubal factor patients. METHODS Patients underwent in vitro fertilization (IVF) treatment as routine and oocytes were fertilized by ICSI. The embryos were group cultured until day 3 of development, and after transfer the culture media were collected. For the proteomics analysis, two pools of samples were prepared for groups CONTROL and PCOS, and 4 pools of samples for group DIE. Samples were prepared to deplete high abundant proteins and followed evaluated by high throughput proteomics approach. RESULTS The embryonic organ and tissue development were physiological functions activated, based on proteins identified in the 3 study groups of samples. The samples coming from DIE patients presented a high calcium activity and on the other hand, embryos coming from PCOS patients showed a decreased calcium action. Other pathways as grow factors through the EGF signaling pathway overexpressed in ENDO culture medium and protein kinase A in PCOS were also observed. CONCLUSIONS Proteomic embryonic secretome will advance our knowledge of early embryogenesis and additionally could lead to improved selection of embryos for transfer warrants further investigation.
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Affiliation(s)
- Tatiana Cs Bonetti
- Disciplina de Ginecologia Endocrinológica, Departamento de Ginecologia, Escola Paulista de Medicina da Universidade Federal de São Paulo (UNIFESP-EPM). Brasil
| | - Debora Cm Haddad
- Setor Integrado de Reprodução Humana, Departamento de Urologia, Escola Paulista de Medicina da Universidade Federal de São Paulo (UNIFESP-EPM). Brasil
| | - Thais S Domingues
- Disciplina de Ginecologia Endocrinológica, Departamento de Ginecologia, Escola Paulista de Medicina da Universidade Federal de São Paulo (UNIFESP-EPM). Brasil.,Huntington - Medicina Reprodutiva. Brasil
| | | | - Eduardo LA Motta
- Disciplina de Ginecologia Endocrinológica, Departamento de Ginecologia, Escola Paulista de Medicina da Universidade Federal de São Paulo (UNIFESP-EPM). Brasil.,Huntington - Medicina Reprodutiva. Brasil
| | - Kent Seeley
- Proteomics and Mass Spectrometry Facility, Center for Drug Discovery and Innovation (CDDI), University of South Florida (USF). USA
| | - Ismael Dcg Silva
- Disciplina de Ginecologia Endocrinológica, Departamento de Ginecologia, Escola Paulista de Medicina da Universidade Federal de São Paulo (UNIFESP-EPM). Brasil
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Sanchez T, Zhang M, Needleman D, Seli E. Metabolic imaging via fluorescence lifetime imaging microscopy for egg and embryo assessment. Fertil Steril 2019; 111:212-218. [PMID: 30691624 DOI: 10.1016/j.fertnstert.2018.12.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Accepted: 12/14/2018] [Indexed: 01/07/2023]
Abstract
Current strategies for embryo assessment in the assisted reproductive technology laboratories rely primarily on morphologic parameters that have limited accuracy for determining embryo viability. Even with the addition of invasive diagnostic interventions such as preimplantation genetic testing for aneuploidy alone or in combination with mitochondrial DNA copy number assessment, at least one third of embryos fail to implant. Therefore, at a time when the clinical benefits of single ET are widely accepted, improving viability assessment of embryos is ever more important. Building on the previous work demonstrating the importance of metabolic state in oocytes and embryos, metabolic imaging via fluorescence lifetime imaging microscopy offers new and potentially useful diagnostic method by detecting natural fluorescence of FAD and NADH, the two electron transporters that play a central role in oxidative phosphorylation. Recent studies demonstrate that fluorescence lifetime imaging microscopy can detect oocyte and embryo metabolic function and dysfunction in a multitude of experimental models and provide encouraging evidence for use in scientific investigation and possibly for clinical application.
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Affiliation(s)
- Tim Sanchez
- Department of Molecular and Cellular Biology and Faculty of Arts and Sciences Center for Systems Biology and John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts
| | - Man Zhang
- Department of Obstetrics, Gynecology and Reproductive Science, Yale University, New Haven, Connecticut
| | - Dan Needleman
- Department of Molecular and Cellular Biology and Faculty of Arts and Sciences Center for Systems Biology and John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts
| | - Emre Seli
- Department of Obstetrics, Gynecology and Reproductive Science, Yale University, New Haven, Connecticut.
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N-acetylcysteine addition after vitrification improves oocyte mitochondrial polarization status and the quality of embryos derived from vitrified murine oocytes. BMC Vet Res 2019; 15:31. [PMID: 30654800 PMCID: PMC6337864 DOI: 10.1186/s12917-018-1743-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Accepted: 12/07/2018] [Indexed: 12/24/2022] Open
Abstract
Background Vitrification is the safest method to cryopreserve oocytes, however the process alters mitochondrial function resulting from increased reactive oxygen species (ROS) production. Our aim was to alleviate ROS stress in vitrified mice oocytes using N-acetylcysteine (NAC at 1 mM), to improve the oocyte’s developmental competence. Results Hence, four experimental groups were compared: fresh oocytes (F-C), vitrified oocytes (V-C), NAC addition prior to oocyte vitrification (V-NAC-Pre) and NAC addition after vitrification (V-NAC-Post). V-NAC-Pre and V-NAC-Post exhibited higher levels of mitochondrial polarization compared to vitrified oocytes (36.5 ± 3.1, 37.7 ± 1.3 and 27.2 ± 2.4 measured as the spatial coefficient of variation/oocyte respectively, mean ± SEM; p < 0.05). However, ROS production increased in vitrified oocytes added with NAC compared to the vitrified control (1124.7 ± 102.1 [V-NAC-Pre] and 1063.2 ± 82.1 [V-NAC-Post] vs. 794.6 ± 164.9 [V-C]; arbitrary fluorescence units/oocyte, mean ± SEM; p < 0.05). ATP significantly decreased in V-NAC-Pre compared to V-NAC-Post oocytes (18.5 ± 6.9 vs. 54.2 ± 4.6 fmol/oocyte respectively, mean ± SEM; p < 0.05), and no differences were observed between V-NAC-Post, F-C and V-C groups. Blastocyst rates derived from F-C oocytes was higher than those derived from V-NAC-Pre (90.7 ± 1.8 vs. 79.1 ± 1.8, respectively, mean % ± SEM,; p < 0.05) but similar to those derived from V-NAC-Post (90.7 ± 1.8, mean % ± SEM, p > 0.05). Total blastomere count of blastocysts derived from V-NAC-Post after in vitro fertilization (IVF) was higher than embryos produced from V-C. Conclusions The addition of NAC after vitrification improves the quality of vitrified mature murine oocytes while its addition prior to vitrification is advised against.
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Hou X, Zhu S, Zhang H, Li C, Qiu D, Ge J, Guo X, Wang Q. Mitofusin1 in oocyte is essential for female fertility. Redox Biol 2019; 21:101110. [PMID: 30690319 PMCID: PMC6351231 DOI: 10.1016/j.redox.2019.101110] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2018] [Revised: 01/10/2019] [Accepted: 01/11/2019] [Indexed: 12/16/2022] Open
Abstract
Mitofusins (Mfn) are the important regulators of mitochondrial organization in mammalian cells; however, their roles during oocyte development remain unknown. In the present study, we generated mice with oocyte-specific knockout of Mfn1 or Mfn2 (Mfn1fl/fl;Zp3-Cre or Mfn2fl/fl;Zp3-Cre). We report that deletion of Mfn1, but not Mfn2, in oocytes leads to female mice sterility, associated with the defective folliculogenesis and impaired oocyte quality. In specific, follicles are arrested at secondary stage in Mfn1fl/fl;Zp3-Cre mice, accompanying with the reduced proliferation of granulosa cells. Moreover, alterations of mitochondrial structure and distribution pattern are readily observed in Mfn1-null oocytes. Consistent with this, mitochondrial activity and function are severely disrupted in oocytes from Mfn1fl/fl;Zp3-Cre mice. In addition, the differentially expressed genes in Mfn1-deleted oocytes are also identified by whole-transcriptome sequencing. In sum, these results demonstrate that Mfn1-modulated mitochondrial function is essential for oocyte development and folliculogenesis, providing a novel mechanism determining female fertility.
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Affiliation(s)
- Xiaojing Hou
- State Key Laboratory of Reproductive Medicine, Nanjing Medical University, 101 Longmian Rd, Nanjing, Jiangsu 211166, China; Women's Hospital of Nanjing Medical University, Nanjing Maternity and Child HealthCare Hospital, Nanjing, China
| | - Shuai Zhu
- State Key Laboratory of Reproductive Medicine, Nanjing Medical University, 101 Longmian Rd, Nanjing, Jiangsu 211166, China
| | - Hao Zhang
- State Key Laboratory of Reproductive Medicine, Nanjing Medical University, 101 Longmian Rd, Nanjing, Jiangsu 211166, China; Department of Histology and Embryology, Nanjing Medical University, Nanjing, China
| | - Chunling Li
- State Key Laboratory of Reproductive Medicine, Nanjing Medical University, 101 Longmian Rd, Nanjing, Jiangsu 211166, China
| | - Danhong Qiu
- State Key Laboratory of Reproductive Medicine, Nanjing Medical University, 101 Longmian Rd, Nanjing, Jiangsu 211166, China
| | - Juan Ge
- State Key Laboratory of Reproductive Medicine, Nanjing Medical University, 101 Longmian Rd, Nanjing, Jiangsu 211166, China
| | - Xuejiang Guo
- State Key Laboratory of Reproductive Medicine, Nanjing Medical University, 101 Longmian Rd, Nanjing, Jiangsu 211166, China; Department of Histology and Embryology, Nanjing Medical University, Nanjing, China.
| | - Qiang Wang
- State Key Laboratory of Reproductive Medicine, Nanjing Medical University, 101 Longmian Rd, Nanjing, Jiangsu 211166, China; Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, China.
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Hara T, Kin A, Aoki S, Nakamura S, Shirasuna K, Kuwayama T, Iwata H. Resveratrol enhances the clearance of mitochondrial damage by vitrification and improves the development of vitrified-warmed bovine embryos. PLoS One 2018; 13:e0204571. [PMID: 30335749 PMCID: PMC6193637 DOI: 10.1371/journal.pone.0204571] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Accepted: 09/11/2018] [Indexed: 12/02/2022] Open
Abstract
The present study investigated the vitrification-induced deterioration of mitochondrial functions that may reduce the developmental ability of post-warming bovine embryos. In addition, the effect of supplementation of the culture medium with resveratrol on the mitochondrial functions and post-warming embryonic development was examined. Two days after in vitro fertilization, embryos with 8–12 cells (referred to hereafter as 8-cell embryos) were vitrified and warmed, followed by in vitro incubation for 5 days in a culture medium containing either the vehicle or 0.5 μM resveratrol. Vitrification reduced embryonic development until the blastocyst stage, reduced the ATP content of embryos, and impaired the mitochondrial genome integrity, as determined by real-time polymerase chain reaction. Although the total cell number and mitochondrial DNA copy number (Mt-number) of blastocysts were low in the vitrified embryos, the Mt-number per blastomere was similar among the blastocysts derived from fresh (non-vitrified) and vitrified-warmed embryos. Supplementation of the culture medium with resveratrol enhanced the post-warming embryonic development and reduced the Mt-number and reactive oxygen species level in blastocysts and blastomeres without affecting the ATP content. An increase in the content of cell-free mitochondrial DNA in the spent culture medium was observed following cultivation of embryos with resveratrol. These results suggested that vitrification induces mitochondrial damages and that resveratrol may enhance the development of post-warming embryos and activates the degeneration of damaged mitochondria, as indicated by the increase in the cell-free mitochondrial DNA content in the spent culture medium and the decrease in the Mt-number of blastocysts and blastomeres.
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Affiliation(s)
- Tomotaka Hara
- Department of Animal Science, Tokyo University of Agriculture, Atsugi, Kanagawa, Japan
| | - Airi Kin
- Department of Animal Science, Tokyo University of Agriculture, Atsugi, Kanagawa, Japan
| | - Sogo Aoki
- Department of Animal Science, Tokyo University of Agriculture, Atsugi, Kanagawa, Japan
| | - Shinsuke Nakamura
- Department of Animal Science, Tokyo University of Agriculture, Atsugi, Kanagawa, Japan
| | - Koumei Shirasuna
- Department of Animal Science, Tokyo University of Agriculture, Atsugi, Kanagawa, Japan
| | - Takehito Kuwayama
- Department of Animal Science, Tokyo University of Agriculture, Atsugi, Kanagawa, Japan
| | - Hisataka Iwata
- Department of Animal Science, Tokyo University of Agriculture, Atsugi, Kanagawa, Japan
- * E-mail:
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Sanaei B, Movaghar B, Valojerdi MR, Ebrahimi B, Bazrgar M, Jafarpour F, Nasr-Esfahani MH. An improved method for vitrification of in vitro matured ovine oocytes; beneficial effects of Ethylene Glycol Tetraacetic acid, an intracellular calcium chelator. Cryobiology 2018; 84:82-90. [PMID: 30244698 DOI: 10.1016/j.cryobiol.2018.07.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 06/03/2018] [Accepted: 07/02/2018] [Indexed: 01/17/2023]
Abstract
Vitrification affects fertilization ability and developmental competence of mammalian oocytes. This effect may be more closely associated with an intracellular calcium rise induced by cryoprotectants. The present study aimed to assess whether addition of Ethylene Glycol Tetraacetic acid (EGTA) to vitrification solution could improve quality and developmental competence of in vitro matured ovine oocytes. Vitrified groups were designed according to the presence or absence of EGTA and/or calcium in base media, including: mPB1+ (modified PBS with Ca2+), mPB1- (modified PBS without Ca2+), mPB1+/EGTA (mPB1+ containing EGTA), mPB1-/EGTA (mPB1- containing EGTA). In vitro development, numerical chromosome abnormalities, hardening of zona pellucida, mitochondrial distribution and function of viable oocytes were evaluated and compared between groups. Quality of blastocysts was assessed by differential and TUNEL staining. Also, mRNA expression levels of six candidate genes (KIF11, KIF2C, CENP-E, KIF20A, KIF4A and KIF2A), were quantitatively evaluated by RT-PCR. Our results showed that calcium-free vitrification and EGTA supplementation can significantly increase the percentage of normal haploid oocytes and maintain normal distribution and function of mitochondria in vitrified ovine oocytes, consequently improving developmental rate after in vitro fertilization. qRT-PCR analysis showed no significant difference in mRNA expression levels of kinesin genes between vitrified and fresh oocytes. Also, the presence of calcium in vitrification solution significantly increased zona hardening. In conclusion, we have shown for the first time that supplementation of vitrification solution with EGTA, as a calcium chelator, improved the ability of vitrified ovine oocytes to preserve mitochondrial distribution and function, as well as normal chromosome segregation.
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Affiliation(s)
- Batool Sanaei
- Department of Embryology, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Bahar Movaghar
- Department of Embryology, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran.
| | | | - Bita Ebrahimi
- Department of Embryology, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Masood Bazrgar
- Department of Genetics, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Farnoosh Jafarpour
- Department of Reproductive Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - Mohammad Hossein Nasr-Esfahani
- Department of Reproductive Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
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Tarahomi M, de Melker AA, van Wely M, Hamer G, Repping S, Mastenbroek S. pH stability of human preimplantation embryo culture media: effects of culture and batches. Reprod Biomed Online 2018; 37:409-414. [PMID: 30228072 DOI: 10.1016/j.rbmo.2018.08.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Revised: 08/04/2018] [Accepted: 08/07/2018] [Indexed: 11/17/2022]
Abstract
RESEARCH QUESTION How stable is the pH of human preimplantation embryo culture media during IVF culture and is there variation in pH between batches of culture media? DESIGN To evaluate pH stability, three batches of three culture media were incubated in triplicate without embryos (sham culture) at CO2 levels recommended by the manufacturers (5% or 6%) for 4 days. To evaluate differences in pH between batches, the pH of three batches of five culture media was measured in triplicate during 1 day of sham culture. Linear mixed models were used for the analysis. RESULTS An increase in pH during 4 days of culture was found in all three culture media, but the observed increased values were within the generally accepted range for clinical practice (pH 7.2-7.4). One medium was pH 7.1 in the first 2 days, but this was within the range provided by the manufacturer for that medium. Three out of five analysed media showed batch variation in pH that exceeded the generally accepted range for clinical practice. CONCLUSIONS A relevant difference in pH was found between batches of human preimplantation embryo culture media. This suggests that the CO2 level of incubators may need to be adjusted for new batches of culture medium based on measured pH, to anticipate batch variability and safely accommodate limited pH increase over time. This study was unable to identify the cause of the differences in pH between batches, and further investigation on a larger number of batches and other media seems warranted.
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Affiliation(s)
- Majid Tarahomi
- Centre for Reproductive Medicine, Amsterdam Reproduction and Development Research Institute, Academic Medical Centre, University of AmsterdamAmsterdam, the Netherlands; Reproductive Biotechnology Research Centre, Avicenna Research Institute, ACECRTehran, Iran
| | - Annemieke A de Melker
- Centre for Reproductive Medicine, Amsterdam Reproduction and Development Research Institute, Academic Medical Centre, University of AmsterdamAmsterdam, the Netherlands
| | - Madelon van Wely
- Centre for Reproductive Medicine, Amsterdam Reproduction and Development Research Institute, Academic Medical Centre, University of AmsterdamAmsterdam, the Netherlands
| | - Geert Hamer
- Centre for Reproductive Medicine, Amsterdam Reproduction and Development Research Institute, Academic Medical Centre, University of AmsterdamAmsterdam, the Netherlands
| | - Sjoerd Repping
- Centre for Reproductive Medicine, Amsterdam Reproduction and Development Research Institute, Academic Medical Centre, University of AmsterdamAmsterdam, the Netherlands
| | - Sebastiaan Mastenbroek
- Centre for Reproductive Medicine, Amsterdam Reproduction and Development Research Institute, Academic Medical Centre, University of AmsterdamAmsterdam, the Netherlands.
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Amoushahi M, Salehnia M, Ghorbanmehr N. The mitochondrial DNA copy number, cytochrome c oxidase activity and reactive oxygen species level in metaphase II oocytes obtained from in vitro culture of cryopreserved ovarian tissue in comparison with in vivo-obtained oocyte. J Obstet Gynaecol Res 2018; 44:1937-1946. [PMID: 30084218 DOI: 10.1111/jog.13747] [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: 12/13/2017] [Accepted: 06/15/2018] [Indexed: 12/20/2022]
Abstract
AIM To evaluate the mitochondrial DNA (mtDNA) copy number, reactive oxygen species (ROS) level and intensity of mitochondrial enzyme activity in metaphase II oocytes derived from vitrified cultured immature mouse ovarian tissue in comparison with nonvitrified group and in vivo-obtained oocytes. METHODS Vitrified and nonvitrified ovaries from neonate female mice were cultured for 7 days. Then, preantral follicles were isolated and cultured in a three-dimensional culture system. Follicular development and oocyte maturation were evaluated and compared in both groups. Some of the collected metaphase II oocytes derived from in vitro and in vivo conditions were inseminated with capacitated spermatozoa, and then, the fertilization and embryo developmental rates were assessed. In the other series of oocytes, mtDNA copy number, distribution and enzyme activity and ROS level were analyzed. RESULTS The embryo development, mtDNA copy number and mitochondrial enzyme activity in collected metaphase II oocytes from two in vitro-cultured groups were significantly lower, and the ROS level was higher than those of the in vivo group (P < 0.05), but there was no significant difference between vitrified and nonvitrified groups. CONCLUSION This study showed that a two-step in vitro culture of mouse ovarian tissue decreased the mtDNA copy number and cytochrome c oxidase activity of metaphase II oocytes through an increase in their ROS level in comparison with in vivo-obtained oocytes. Thus, the in vitro culture methods should be improved.
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Affiliation(s)
| | - Mojdeh Salehnia
- Department of Anatomy, Tarbiat Modares University, Tehran, Iran
| | - Nassim Ghorbanmehr
- Department of Biotechnology, Faculty of Biological Sciences, Alzahra University, Tehran, Iran
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Silva LM, Mbemya GT, Guerreiro DD, Brito DCC, Donfack NJ, Morais MLG, Rodrigues GQ, Bruno JB, Rocha RMP, Alves BG, Apgar GA, Cibin FWS, Figueiredo JR, Rodrigues APR. Effect of Catalase or Alpha Lipoic Acid Supplementation in the Vitrification Solution of Ovine Ovarian Tissue. Biopreserv Biobank 2018; 16:258-269. [DOI: 10.1089/bio.2017.0122] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Affiliation(s)
- Luciana M. Silva
- PPGCV-LAMOFOPA-Universidade Estadual do Ceará (UECE), Fortaleza, Brasil
| | - Gildas T. Mbemya
- PPGCV-LAMOFOPA-Universidade Estadual do Ceará (UECE), Fortaleza, Brasil
| | | | | | | | | | | | - Jamily B. Bruno
- PPGCV-LAMOFOPA-Universidade Estadual do Ceará (UECE), Fortaleza, Brasil
| | | | - Benner G. Alves
- PPGCV-LAMOFOPA-Universidade Estadual do Ceará (UECE), Fortaleza, Brasil
| | - Gary A. Apgar
- PPGCV-LAMOFOPA-Universidade Estadual do Ceará (UECE), Fortaleza, Brasil
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Li F, Castora FJ, Ford W, Alarid K, Jones HW, Swanson RJ. Reproductive competency and mitochondrial variation in aged Syrian hamster oocytes. Reprod Fertil Dev 2018; 29:1384-1391. [PMID: 27327865 DOI: 10.1071/rd15404] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Accepted: 05/09/2016] [Indexed: 11/23/2022] Open
Abstract
The hamster is a useful model of human reproductive biology because its oocytes are similar to those in humans in terms of size and structural stability. In the present study we evaluated fecundity rate, ovarian follicular numbers, ova production, mitochondrial number, structure and function, and cytoplasmic lamellae (CL) in young (2-4 months) and old (12-18 months) Syrian hamsters (Mesocricetus auratus). Young hamsters had higher fertilisation rates and larger litters than old hamsters (100 vs 50% and 9.3±0.6 vs 5.5±0.6, respectively). Ovarian tissue from superovulated animals showed a 46% decrease in preantral follicles in old versus young hamsters. There was a 39% reduction in MII oocyte number in old versus young hamsters. Young ova had no collapsed CL, whereas old ova were replete with areas of collapsed, non-luminal CL. Eighty-nine per cent of young ova were expanded against the zona pellucida with a clear indentation at the polar body, compared with 58.64% for old ova; the remaining old ova had increased perivitelline space with no polar body indentation. Higher reactive oxygen species levels and lower mitochondrial membrane potentials were seen in ova from old versus young hamsters. A significant decrease in mitochondrial number (36%) and lower frequency of clear mitochondria (31%) were observed in MII oocytes from old versus young hamster. In conclusion, the results of the present study support the theory of oocyte depletion during mammalian aging, and suggest that morphological changes of mitochondria and CL in oocytes may be contributing factors in the age-related decline in fertility rates.
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Affiliation(s)
- Fang Li
- Department of Biological Sciences, Old Dominion University, 5115 Hampton Blvd, Norfolk, VA 23529, USA
| | - Frank J Castora
- Department of Physiological Sciences, Eastern Virginia Medical School, 721 Fairfax Ave, Norfolk, VA 23507, USA
| | - Wentia Ford
- Department of Biological Sciences, Old Dominion University, 5115 Hampton Blvd, Norfolk, VA 23529, USA
| | - Khalid Alarid
- Department of Biological Sciences, Old Dominion University, 5115 Hampton Blvd, Norfolk, VA 23529, USA
| | - Howard W Jones
- The Jones Institute for Reproductive Medicine, Eastern Virginia Medical School, 601 Colley Ave, Norfolk, VA 23507, USA
| | - R James Swanson
- Department of Biological Sciences, Old Dominion University, 5115 Hampton Blvd, Norfolk, VA 23529, USA
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Preincubation with glutathione ethyl ester improves the developmental competence of vitrified mouse oocytes. J Assist Reprod Genet 2018; 35:1169-1178. [PMID: 29876682 DOI: 10.1007/s10815-018-1215-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2018] [Accepted: 05/17/2018] [Indexed: 01/08/2023] Open
Abstract
PURPOSE Oocyte vitrification is currently used for human fertility preservation. However, vitrification damage is a problem caused by decreasing ooplasmic levels of glutathione (GSH). The GSH donor glutathione ethyl ester (GSH-OEt) can significantly increase the GSH content in oocytes. However, it is difficult to obtain oocyte from woman. To overcome this, we used mouse oocytes to replace human oocytes as a model of study. METHODS Oocytes from B6D2F1 mice were preincubated for 30 min with 2.5 mmol/L GSH-OEt (GSH-OEt group), without GSH-OEt preincubation before vitrification (control vitrification group) or in nonvitrified oocytes (fresh group). After thawing, oocytes were fertilized for evaluating the developmental competence of embryos in vitro and in vivo. Immunofluorescence, Polscope equipment and quantitative reverse transcription polymerase chain reaction (RT-qPCR) were used to analyze damage, including mitochondrial distribution, reactive oxygen species (ROS) levels, spindle morphology, and gene expression levels (Bcl-2, BAX, and MnSOD). RESULTS The rates of fertilization, 3-4 cell, blastocyst formation and expanded blastocysts were significantly higher (p < 0.05) in the GSH-OEt group (90.4%; 91.1%; 88.9% and 63.0%) than in the control (80.0%; 81.4%; 77.7% and 50.5%). Provided embryos overcame the 2-cell block and developed to the blastocyst stage, birth rates of all groups were similar. Vitrification altered mitochondrial distribution, increased ROS levels, and caused abnormal spindle morphology; GSH-OEt preincubation could improve such damage. RT-qPCR showed that the expression of Bcl-2 was lower in the control group compared with the GSH-OEt group; BAX and MnSoD expression levels were higher in the control group than in the GSH-OEt group (p < 0.05). CONCLUSIONS The beneficial effect of GSH-OEt preincubation occurred before the 2-cell stage.
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38
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Wang Y, Zhang M, Chen ZJ, Du Y. Resveratrol promotes the embryonic development of vitrified mouse oocytes after in vitro fertilization. In Vitro Cell Dev Biol Anim 2018; 54:430-438. [DOI: 10.1007/s11626-018-0262-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Accepted: 05/02/2018] [Indexed: 11/30/2022]
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Yamada K, Hiradate Y, Goto M, Nishiyama C, Hara K, Yoshida H, Tanemura K. Potassium bromate disrupts mitochondrial distribution within murine oocytes during in vitro maturation. Reprod Med Biol 2018; 17:143-148. [PMID: 29692671 PMCID: PMC5902466 DOI: 10.1002/rmb2.12079] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Accepted: 11/08/2017] [Indexed: 01/10/2023] Open
Abstract
Purpose As disturbed mitochondrial distribution is thought to be a cause of the aging of oocytes, it was investigated whether oxidizing agents exert harmful effects on nuclear maturation and mitochondrial cluster formation in murine oocytes and whether antioxidants could rescue such harmful effects in vitro. Methods Oocytes were obtained from female Institute of Cancer Research mice 48 h after an intraperitoneal injection of 7.5 IU pregnant mare serum gonadotropin. The oocytes were cultured with potassium bromate, an oxidizing agent, in the presence or absence of the antioxidant, resveratrol. After 12 h, the nuclear phases and mitochondrial distribution were observed. Results Significantly decreased rates of metaphase II (MII) oocytes were observed with 750 μM and 1000 μM of potassium bromate, while a significant increase in abnormal mitochondrial clusters was induced at 500 μM, 750 μM, and 1,000 μM. The addition of 10 μM or 20 μM resveratrol improved both MII maturity and the cluster formation rates in the presence of potassium bromate. Conclusions The addition of potassium bromate reduced MII maturity rates and induced abnormal mitochondrial cluster formation. This effect was alleviated by the antioxidant, resveratrol. The in vitro model used herein is useful for investigating the functions of antioxidants in the aging of oocytes.
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Affiliation(s)
- Kenichi Yamada
- Laboratory of Animal Reproduction and Development Graduate School of Agricultural Science Tohoku University Sendai Japan.,Sendai ART Clinic Sendai Japan
| | - Yuuki Hiradate
- Laboratory of Animal Reproduction and Development Graduate School of Agricultural Science Tohoku University Sendai Japan
| | - Mei Goto
- Laboratory of Animal Reproduction and Development Graduate School of Agricultural Science Tohoku University Sendai Japan
| | - Chiho Nishiyama
- Laboratory of Animal Reproduction and Development Graduate School of Agricultural Science Tohoku University Sendai Japan
| | - Kenshiro Hara
- Laboratory of Animal Reproduction and Development Graduate School of Agricultural Science Tohoku University Sendai Japan
| | | | - Kentaro Tanemura
- Laboratory of Animal Reproduction and Development Graduate School of Agricultural Science Tohoku University Sendai Japan
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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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Melatonin Improves the Quality of Inferior Bovine Oocytes and Promoted Their Subsequent IVF Embryo Development: Mechanisms and Results. Molecules 2017; 22:molecules22122059. [PMID: 29186876 PMCID: PMC6149663 DOI: 10.3390/molecules22122059] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Revised: 11/17/2017] [Accepted: 11/21/2017] [Indexed: 02/02/2023] Open
Abstract
The inferior oocytes (IOs), which are not suitable for embryo development, occupy roughly one-third or more of the collected immature bovine oocytes. The IOs are usually discarded from the in vitro bovine embryo production process. Improving the quality of the inferior oocytes (IOs) and make them available in in vitro embryo production would have important biological, as well as commercial, value. This study was designed to investigate whether melatonin could improve the quality of IOs and make them usable in the in vitro maturation (IVM) and subsequent (in vitro fertilization) IVF embryo development. The results indicated that: the maturation rate of IOs and their subsequent IVF embryo developments were impaired compared to cumulus-oocyte complexes and melatonin treatment significantly improved the quality of IOs, as well as their IVF and embryo developments. The potential mechanisms are that: (1) melatonin reduced reactive oxygen species (ROS) and enhanced glutathione (GSH) levels in the IOs, thereby protecting them from oxidative stress; (2) melatonin improved mitochondrial normal distribution and function to increase ATP level in IOs; and (3) melatonin upregulated the expression of ATPase 6, BMP-15, GDF-9, SOD-1, Gpx-4, and Bcl-2, which are critical genes for oocyte maturation and embryo development and downregulated apoptotic gene expression of caspase-3.
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Protective effects of ethanol extracts of Artemisia asiatica Nakai ex Pamp. on ageing-induced deterioration in mouse oocyte quality. ZYGOTE 2017. [DOI: 10.1017/s0967199417000296] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
SummaryFollowing ovulation, oocytes undergo a time-dependent deterioration in quality referred to as post-ovulatory ageing. Although various factors influence the post-ovulatory ageing of oocytes, oxidative stress is a key factor involved in deterioration of oocyte quality. Artemisia asiatica Nakai ex Pamp. has been widely used in East Asia as a food ingredient and traditional medicine for the treatment of inflammation, cancer, and microbial infections. Recent studies have shown that A. asiatica exhibits antioxidative effects. In this study, we investigated whether A. asiatica has the potential to attenuate deterioration in oocyte quality during post-ovulatory ageing. Freshly ovulated mouse oocytes were cultured with 0, 50, 100 or 200 μg/ml ethanol extracts of A. asiatica Nakai ex Pamp. After culture for up to 24 h, various ageing-induced oocyte abnormalities, including morphological changes, reactive oxygen species (ROS) accumulation, apoptosis, chromosome and spindle defects, and mitochondrial aggregation were determined. Treatment of oocytes with A. asiatica extracts reduced ageing-induced morphological changes. Moreover, A. asiatica extracts decreased ROS generation and the onset of apoptosis by preventing elevation of the Bax/Bcl-2 expression ratio during post-ovulatory ageing. Furthermore, A. asiatica extracts attenuated the ageing-induced abnormalities including spindle defects, chromosome misalignment and mitochondrial aggregation. Our results demonstrate that A. asiatica can relieve deterioration in oocyte quality and delay the onset of apoptosis during post-ovulatory ageing.
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The effect of follicle size and homogeneity of follicular development on the morphokinetics of human embryos. J Assist Reprod Genet 2017; 34:895-903. [PMID: 28470453 PMCID: PMC5476546 DOI: 10.1007/s10815-017-0935-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Accepted: 04/25/2017] [Indexed: 01/01/2023] Open
Abstract
Purpose Our aim was to investigate follicular size (large, ≥17 mm and small, <17 mm) at the time of OPU and homogeneity of follicular development (homogenous development: follicles being present in a homogenous spread of all sizes; heterogeneous: a predominance of small and large follicles) by analysing the morphokinetics of embryo development. Methods In this prospective cohort study, 2526 COCs belonging to 187 patients were cultured to day 5. Embryos were evaluated morphokinetically. Four subgroups were defined: large follicles from heterogeneous cycles (LHet) and homogenous cycles (LHom) and small follicles from heterogeneous cycles (SHet) and homogenous cycles (SHom). Results Rates of fertilization, blastocyst formation and top and good quality blastocysts were found to be significantly higher in embryos from the LHom group (p < 0.001; p < 0.001; p < 0.001). Small follicles from both homogenous and heterogeneous cycles had significantly lower blastocyst formation and top and good quality blastocyst rates (p < 0.001; p < 0.001). Embryos from SHet had significantly more direct cleavages (p = 0.011). Time to reach blastocyst was shorter in SHom than LHet and LHom (p = 0.002; p = 0.027, respectively). However, once the blastocyst stage was achieved, implantation rates were not significantly different between subgroups, the highest rate being observed in the LHom group. Multivariable analysis revealed that homogeneity of follicular development and follicular size had a significant effect on blastocyst development and quality (p = 0.049; p < 0.001, respectively). Conclusion Follicular dynamics, illustrated by follicular size and homogeneity of follicular development, influence early human embryo development. Patterns of follicular growth have an impact on embryo quality and viability which is reflected in morphokinetic variables. Electronic supplementary material The online version of this article (doi:10.1007/s10815-017-0935-1) contains supplementary material, which is available to authorized users.
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Wang N, Li CY, Zhu HB, Hao HS, Wang HY, Yan CL, Zhao SJ, Du WH, Wang D, Liu Y, Pang YW, Zhao XM. Effect of vitrification on the mRNA transcriptome of bovine oocytes. Reprod Domest Anim 2017; 52:531-541. [PMID: 28295644 DOI: 10.1111/rda.12942] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Accepted: 01/17/2017] [Indexed: 12/19/2022]
Abstract
Vitrification has been shown to decrease the developmental capacity of mammalian oocytes, and this is closely associated with the abnormal mRNA expressions of vitrified oocytes. However, the effect of vitrification on transcriptional machinery of oocytes examined by RNA sequencing (RNA-seq) has yet to be defined. In the present study, the mRNA transcriptomes of fresh and vitrified bovine oocytes were analysed by Smart-seq2 with the differently expressed genes determined by DEseq2 (an adjusted p-value of .05 and a minimum fold change of 2). The differentially expressed mRNAs were then searched against the Gene Ontology (GO) and Genomes (KEGG) database. Finally, the mRNA expressions of 10 candidate genes were validated using quantitative real-time PCR (qRT-PCR). Approximately 12,000 genes were detected in each sample of fresh or vitrified oocytes. Of these, the expression levels of 102 genes differed significantly in vitrified groups: 12 genes mainly involved in cell cycle, fertilization and glucose metabolism were upregulated, and 90 genes mainly involved in mitochondria, ribosomal protein, cytoskeleton, transmembrane protein, cell cycle and calcium ions were downregulated. GO analysis showed that these genes were mainly enriched in terms of membrane-bounded organelles, macromolecular complex, and intracellular part. The mRNA expression levels of 10 candidate genes selected randomly were in agreement with the results of the RNA-seq. In conclusion, our results showed that vitrification affected the mRNA transcriptome of bovine oocytes by downregulating genes, which contributed to the decreased developmental capacity of vitrified oocytes. Our findings will be useful in determining approaches to improve the efficiency of vitrified oocytes.
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Affiliation(s)
- N Wang
- Embryo Biotechnology and Reproduction Laboratory, Institute of Animal Sciences (IAS), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| | - C-Y Li
- Embryo Biotechnology and Reproduction Laboratory, Institute of Animal Sciences (IAS), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| | - H-B Zhu
- Embryo Biotechnology and Reproduction Laboratory, Institute of Animal Sciences (IAS), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| | - H-S Hao
- Embryo Biotechnology and Reproduction Laboratory, Institute of Animal Sciences (IAS), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| | - H-Y Wang
- Embryo Biotechnology and Reproduction Laboratory, Institute of Animal Sciences (IAS), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| | - C-L Yan
- Livestock and Poultry Import & Export Dept, China Animal Husbandry Group (CAHG), Beijing, China
| | - S-J Zhao
- Embryo Biotechnology and Reproduction Laboratory, Institute of Animal Sciences (IAS), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| | - W-H Du
- Embryo Biotechnology and Reproduction Laboratory, Institute of Animal Sciences (IAS), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| | - D Wang
- Embryo Biotechnology and Reproduction Laboratory, Institute of Animal Sciences (IAS), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| | - Y Liu
- Embryo Biotechnology and Reproduction Laboratory, Institute of Animal Sciences (IAS), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| | - Y-W Pang
- Embryo Biotechnology and Reproduction Laboratory, Institute of Animal Sciences (IAS), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| | - X-M Zhao
- Embryo Biotechnology and Reproduction Laboratory, Institute of Animal Sciences (IAS), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
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Swain JE. Novel Imaging Techniques to Assess Gametes and Preimplantation Embryos. Hum Reprod 2016. [DOI: 10.1002/9781118849613.ch6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Affiliation(s)
- Jason E. Swain
- Center for Reproductive Medicine, Department of Obstetrics & Gynecology; University of Michigan; Ann Arbor MI USA
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Roth Z. Effect of Heat Stress on Reproduction in Dairy Cows: Insights into the Cellular and Molecular Responses of the Oocyte. Annu Rev Anim Biosci 2016; 5:151-170. [PMID: 27732786 DOI: 10.1146/annurev-animal-022516-022849] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Among the components of the female reproductive tract, the ovarian pool of follicles and their enclosed oocytes are highly sensitive to hyperthermia. Heat-induced alterations in small antral follicles can be expressed later as compromised maturation and developmental capacity of the ovulating oocyte. This review summarizes the most up-to-date information on the effects of heat stress on the oocyte with an emphasis on unclear points and open questions, some of which might involve new research directions, for instance, whether preantral follicles are heat resistant. The review focuses on the follicle-enclosed oocytes, provides new insights into the cellular and molecular responses of the oocyte to elevated temperature, points out the role of the follicle microenvironment, and discusses some mechanisms that might underlie oocyte impairment. Mechanisms include nuclear and cytoplasmic maturation, mitochondrial function, apoptotic pathways, and oxidative stress. Understanding the mechanism by which heat stress compromises fertility might enable development of new strategies to mitigate its effects.
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Affiliation(s)
- Zvi Roth
- Department of Animal Sciences, Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University, Rehovot 76100, Israel;
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Trapphoff T, Heiligentag M, Simon J, Staubach N, Seidel T, Otte K, Fröhlich T, Arnold GJ, Eichenlaub-Ritter U. Improved cryotolerance and developmental potential of in vitro and in vivo matured mouse oocytes by supplementing with a glutathione donor prior to vitrification. Mol Hum Reprod 2016; 22:867-881. [PMID: 27604460 DOI: 10.1093/molehr/gaw059] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Revised: 08/22/2016] [Accepted: 09/05/2016] [Indexed: 12/20/2022] Open
Abstract
STUDY QUESTION Can supplementation of media with a glutathione (GSH) donor, glutathione ethyl ester (GEE), prior to vitrification protect the mouse oocyte from oxidative damage and critical changes in redox homeostasis, and thereby improve cryotolerance? SUMMARY ANSWER GEE supplementation supported redox regulation, rapid recovery of spindle and chromosome alignment after vitrification/warming and improved preimplantation development of mouse metaphase II (MII) oocytes. WHAT IS KNOWN ALREADY Cryopreservation may affect mitochondrial functionality, induce oxidative stress, and thereby affect spindle integrity, chromosome segregation and the quality of mammalian oocytes. GEE is a membrane permeable GSH donor that promoted fertilization and early embryonic development of macaque and bovine oocytes after IVM. STUDY DESIGN, SIZE, DURATION Two experimental groups consisted of (i) denuded mouse germinal vesicle (GV) oocytes that were matured in vitro in the presence or absence of 1 mM GEE (IVM group 1) and (ii) in vivo ovulated (IVO) MII oocytes that were isolated from the ampullae and exposed to 1 mM GEE for 1 h prior to vitrification (IVO group 2). Recovery of oocytes from both groups was followed after CryoTop vitrification/warming for up to 2 h and parthenogenetic activation. PARTICIPANTS/MATERIALS, SETTING, METHODS Reactive oxygen species (ROS), spindle morphology and chromosome alignment were analyzed by confocal laser scanning microscopy (CLSM) and polarization microscopy in control and GEE-supplemented MII oocytes. The relative overall intra-oocyte GSH content was assessed by analysis of monochlorobimane (MBC)-GSH adduct fluorescence in IVM MII oocytes. The GSH-dependent intra-mitochondrial redox potential (EmGSH) of IVM MII oocytes was determined after microinjection with specific mRNA at the GV stage to express a redox-sensitive probe within mitochondria (mito-Grx1-roGFP2). The absolute negative redox capacity (in millivolts) was determined by analysis of fluorescence of the oxidized versus the reduced form of sensor by CLSM and quantification according to Nernst equation. Proteome analysis was performed by quantitative 2D saturation gel electrophoresis (2D DIGE). Since microinjection and expression of redox sensor mRNA required removal of cumulus cells, and IVM of denuded mouse oocytes in group 1 induces zona hardening, the development to blastocysts was not assessed after IVF but instead after parthenogenetic activation of vitrified/warmed MII oocytes from both experimental groups. MAIN RESULTS AND ROLE OF CHANCE IVM of denuded mouse oocytes in the presence of 1 mM GEE significantly increased intra-oocyte GSH content. ROS was not increased by CryoTop vitrification but was significantly lower in the IVM GEE group compared to IVM without GEE before vitrification and after recovery from vitrification/warming (P < 0.001). Vitrification alone significantly increased the GSH-dependent intra-mitochondrial redox capacity after warming (EmGSH, P < 0.001) in IVM oocytes, presumably by diffusion/uptake of cytoplasmic GSH into mitochondria. The presence of 1 mM GEE during IVM increased the redox capacity before vitrification and there was no further increase after vitrification/warming. None of the reproducibly detected 1492 spots of 2D DIGE separated proteins were significantly altered by vitrification or GEE supplementation. However, IVM of denuded oocytes significantly affected spindle integrity and chromosome alignment right after warming from vitrification (0 h) in group 1 and spindle integrity in group 2 (P < 0.05). GEE improved recovery in IVM group as numbers of oocytes with unaligned chromosomes and aberrant spindles was not significantly increased compared to unvitrified controls. The supplementation with GEE for 1 h before vitrification also supported more rapid recovery of spindle birefringence. GEE improved significantly development to the 2-cell stage for MII oocytes that were activated directly after vitrification/warming in both experimental groups, and also the blastocyst rate in the IVO GEE-supplemented group compared to the controls (P < 0.05). LARGE SCALE DATA None LIMITATIONS, REASONS FOR CAUTION: The studies were carried out in a mouse model, in IVM denuded rather than cumulus-enclosed oocytes, and in activated rather than IVF MII oocytes. Whether the increased GSH-dependent intra-mitochondrial redox capacity also improves male pronuclear formation needs to be studied further experimentally. The influence of GEE supplementation requires also further examination and optimization in human oocytes before it can be considered for clinical ART. WIDER IMPLICATIONS OF THE FINDINGS Although GEE supplementation did not alter the proteome at MII, the GSH donor may support cellular homeostasis and redox regulation and, thus, increase developmental competence. While human MII oocyte vitrification is an established procedure, GEE might be particularly beneficial for oocytes that suffer from oxidative stress and reduced redox capacity (e.g. aged oocytes) or possess low GSH due to a reduced supply of GSH from cumulus. It might also be of relevance for immature human oocytes that develop without cumulus to MII in vitro (e.g. in ICSI cycles) for ART. STUDY FUNDING AND COMPETING INTERESTS The study has been supported by the German Research Foundation (DFG FOR 1041; EI 199/3-2). There are no conflict of interests.
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Affiliation(s)
- Tom Trapphoff
- Institute of Gene Technology/Microbiology, University of Bielefeld, 33501 Bielefeld, Germany
| | - Martyna Heiligentag
- Institute of Gene Technology/Microbiology, University of Bielefeld, 33501 Bielefeld, Germany
| | - Jenny Simon
- Institute of Gene Technology/Microbiology, University of Bielefeld, 33501 Bielefeld, Germany
| | - Nora Staubach
- Institute of Gene Technology/Microbiology, University of Bielefeld, 33501 Bielefeld, Germany
| | - Thorsten Seidel
- Dynamic Cell Imaging, Faculty of Biology, University of Bielefeld, 33501 Bielefeld, Germany
| | - Kathrin Otte
- Laboratory for Functional Genome Analysis (LAFUGA), Gene Center, Ludwig-Maximilians-University Munich, 81377 Munich, Germany
| | - Thomas Fröhlich
- Laboratory for Functional Genome Analysis (LAFUGA), Gene Center, Ludwig-Maximilians-University Munich, 81377 Munich, Germany
| | - Georg J Arnold
- Laboratory for Functional Genome Analysis (LAFUGA), Gene Center, Ludwig-Maximilians-University Munich, 81377 Munich, Germany
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He C, Wang J, Zhang Z, Yang M, Li Y, Tian X, Ma T, Tao J, Zhu K, Song Y, Ji P, Liu G. Mitochondria Synthesize Melatonin to Ameliorate Its Function and Improve Mice Oocyte's Quality under in Vitro Conditions. Int J Mol Sci 2016; 17:ijms17060939. [PMID: 27314334 PMCID: PMC4926472 DOI: 10.3390/ijms17060939] [Citation(s) in RCA: 146] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Revised: 05/30/2016] [Accepted: 06/02/2016] [Indexed: 12/17/2022] Open
Abstract
The physiology of oocyte in vitro maturation remains elusive. Generally, the oocytes have a very low maturation rate under in vitro conditions. In the current study, we found that melatonin promotes the maturation of oocytes in which mitochondria play a pivotal role. It was identified that; (1) mitochondria are the major sites for melatonin synthesis in oocytes and they synthesize large amounts of melatonin during their maturation; (2) melatonin improves mitochondrial function by increased mtDNA copy, mitochondrial membrane potential (ΔΨm) and mitochondrial distribution and ATP production in oocytes; (3) the meiotic spindle assembly is enhanced; (4) melatonin reduces ROS production and inhibits 8-oxodG formation, thereby protecting potential DNA mutation from oxidative damage. As a result, melatonin improves the quality of oocytes, significantly accelerates the developmental ability of IVF embryo. The results provide novel knowledge on the physiology of oocyte’s maturation, especially under in vitro conditions.
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Affiliation(s)
- Changjiu He
- National Engineering Laboratory for Animal Breeding, Key Laboratory of Animal Genetics and Breeding of the Ministry of Agriculture, Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China.
| | - Jing Wang
- National Engineering Laboratory for Animal Breeding, Key Laboratory of Animal Genetics and Breeding of the Ministry of Agriculture, Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China.
| | - Zhenzhen Zhang
- National Engineering Laboratory for Animal Breeding, Key Laboratory of Animal Genetics and Breeding of the Ministry of Agriculture, Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China.
| | - Minghui Yang
- National Engineering Laboratory for Animal Breeding, Key Laboratory of Animal Genetics and Breeding of the Ministry of Agriculture, Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China.
| | - Yu Li
- National Engineering Laboratory for Animal Breeding, Key Laboratory of Animal Genetics and Breeding of the Ministry of Agriculture, Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China.
| | - Xiuzhi Tian
- National Engineering Laboratory for Animal Breeding, Key Laboratory of Animal Genetics and Breeding of the Ministry of Agriculture, Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China.
| | - Teng Ma
- National Engineering Laboratory for Animal Breeding, Key Laboratory of Animal Genetics and Breeding of the Ministry of Agriculture, Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China.
| | - Jingli Tao
- National Engineering Laboratory for Animal Breeding, Key Laboratory of Animal Genetics and Breeding of the Ministry of Agriculture, Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China.
| | - Kuanfeng Zhu
- National Engineering Laboratory for Animal Breeding, Key Laboratory of Animal Genetics and Breeding of the Ministry of Agriculture, Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China.
| | - Yukun Song
- National Engineering Laboratory for Animal Breeding, Key Laboratory of Animal Genetics and Breeding of the Ministry of Agriculture, Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China.
| | - Pengyun Ji
- National Engineering Laboratory for Animal Breeding, Key Laboratory of Animal Genetics and Breeding of the Ministry of Agriculture, Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China.
| | - Guoshi Liu
- National Engineering Laboratory for Animal Breeding, Key Laboratory of Animal Genetics and Breeding of the Ministry of Agriculture, Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China.
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Takahashi Y, Hashimoto S, Yamochi T, Goto H, Yamanaka M, Amo A, Matsumoto H, Inoue M, Ito K, Nakaoka Y, Suzuki N, Morimoto Y. Dynamic changes in mitochondrial distribution in human oocytes during meiotic maturation. J Assist Reprod Genet 2016; 33:929-38. [PMID: 27117688 DOI: 10.1007/s10815-016-0716-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Accepted: 04/11/2016] [Indexed: 11/28/2022] Open
Abstract
PURPOSE The change of mitochondrial distribution in human oocytes during meiotic maturation was assessed using 223 human oocytes donated from patients undergoing fertility treatment between June 2013 and February 2016. METHODS Live cell images of fluorescence-labelled mitochondria in human oocytes were analysed to investigate dynamic changes in mitochondrial distribution during meiotic maturation using a confocal microscope combined with an incubator in the presence or absence of colchicine and cytochalasin B, inhibitors for tubulin and actin filament, respectively. Subcellular distribution of mitochondria in human oocytes was also assessed at various stages using a transmission electron microscope (TEM). RESULTS Live cell imaging analysis revealed that the mitochondria-occupied cytoplasmic area decreased from 83 to 77 % of the total cytoplasmic area around 6 h before germinal vesicle breakdown (GVBD) and that mitochondria accumulated preferentially close to the perinuclear region. Then, the mitochondria-distributed area rapidly increased to 85 % of total cytoplasm at the time of GVBD. On the other hand, there was no significant change in mitochondrial distribution before and after polar body extrusion. Such changes in mitochondrial localization were affected differently by colchicine and cytochalasin B. Most of mitochondria in the cytoplasm formed cluster-like aggregates before GVBD while they distributed homogeneously after GVBD. CONCLUSIONS Most mitochondria localized predominantly in the non-cortical region of the cytoplasm of GV stage-oocytes, while the mitochondria-occupied area decreased transiently before GVBD and increased rapidly to occupy the entire area of the cytoplasm at GVBD by some cytoskeleton-dependent mechanism.
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Affiliation(s)
- Yuki Takahashi
- IVF Namba Clinic, 1-17-28 Minamihorie, Nishi-ku, Osaka, 550-0015, Japan
| | - Shu Hashimoto
- IVF Namba Clinic, 1-17-28 Minamihorie, Nishi-ku, Osaka, 550-0015, Japan.
| | - Takayuki Yamochi
- IVF Namba Clinic, 1-17-28 Minamihorie, Nishi-ku, Osaka, 550-0015, Japan
| | - Hiroya Goto
- IVF Namba Clinic, 1-17-28 Minamihorie, Nishi-ku, Osaka, 550-0015, Japan
| | - Masaya Yamanaka
- IVF Namba Clinic, 1-17-28 Minamihorie, Nishi-ku, Osaka, 550-0015, Japan
| | - Ami Amo
- IVF Namba Clinic, 1-17-28 Minamihorie, Nishi-ku, Osaka, 550-0015, Japan
| | - Hiroshi Matsumoto
- IVF Namba Clinic, 1-17-28 Minamihorie, Nishi-ku, Osaka, 550-0015, Japan
| | - Masayasu Inoue
- IVF Namba Clinic, 1-17-28 Minamihorie, Nishi-ku, Osaka, 550-0015, Japan
| | - Keijiro Ito
- IVF Namba Clinic, 1-17-28 Minamihorie, Nishi-ku, Osaka, 550-0015, Japan
| | - Yoshiharu Nakaoka
- IVF Namba Clinic, 1-17-28 Minamihorie, Nishi-ku, Osaka, 550-0015, Japan
| | - Nao Suzuki
- Department of Obstetrics and Gynecology, St. Marianna University School of Medicine, Kanagawa, Japan
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Zarnescu L, Leung MC, Abeyta M, Sudkamp H, Baer T, Behr B, Ellerbee AK. Label-free characterization of vitrification-induced morphology changes in single-cell embryos with full-field optical coherence tomography. JOURNAL OF BIOMEDICAL OPTICS 2015; 20:096004. [PMID: 26334977 DOI: 10.1117/1.jbo.20.9.096004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Accepted: 07/31/2015] [Indexed: 06/05/2023]
Abstract
Vitrification is an increasingly popular method of embryo cryopreservation that is used in assisted reproductive technology. Although vitrification has high post-thaw survival rates compared to other freezing techniques, its long-term effects on embryo development are still poorly understood. We demonstrate an application of full-field optical coherence tomography (FF-OCT) to visualize the effects of vitrification on live single-cell (2 pronuclear) mouse embryos without harmful labels. Using FF-OCT, we observed that vitrification causes a significant increase in the aggregation of structures within the embryo cytoplasm, consistent with reports in literature based on fluorescence techniques. We quantify the degree of aggregation with an objective metric, the cytoplasmic aggregation (CA) score, and observe a high degree of correlation between the CA scores of FF-OCT images of embryos and of fluorescence images of their mitochondria. Our results indicate that FF-OCT shows promise as a label-free assessment of the effects of vitrification on embryo mitochondria distribution. The CA score provides a quantitative metric to describe the degree to which embryos have been affected by vitrification and could aid clinicians in selecting embryos for transfer.
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Affiliation(s)
- Livia Zarnescu
- Stanford University, Department of Bioengineering, 443 Via Ortega, Stanford, California 94305, United States
| | - Michael C Leung
- Stanford University, E.L. Ginzton Laboratory and Department of Electrical Engineering, 450 Serra Mall, Stanford, California 94305, United States
| | - Michael Abeyta
- Stanford University, IVF Laboratory, Lucille Packard Children's Hospital, 900 Welch Road, Suite 350, Stanford, California 94305, United States
| | - Helge Sudkamp
- Stanford University, E.L. Ginzton Laboratory and Department of Electrical Engineering, 450 Serra Mall, Stanford, California 94305, United States
| | - Thomas Baer
- Stanford University, Stanford Photonics Research Center, 348 Via Pueblo Mall, Stanford, California 94305, United States
| | - Barry Behr
- Stanford University, IVF Laboratory, Lucille Packard Children's Hospital, 900 Welch Road, Suite 350, Stanford, California 94305, United States
| | - Audrey K Ellerbee
- Stanford University, E.L. Ginzton Laboratory and Department of Electrical Engineering, 450 Serra Mall, Stanford, California 94305, United States
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