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Xing X, Liang Y, Li Y, Zhao Y, Zhang Y, Li Z, Li Z, Wu Z. Fisetin Delays Postovulatory Oocyte Aging by Regulating Oxidative Stress and Mitochondrial Function through Sirt1 Pathway. Molecules 2023; 28:5533. [PMID: 37513404 PMCID: PMC10384696 DOI: 10.3390/molecules28145533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 07/04/2023] [Accepted: 07/10/2023] [Indexed: 07/30/2023] Open
Abstract
The quality of oocytes determines the development potential of an embryo and is dependent on their timely fertilization after ovulation. Postovulatory oocyte aging is an inevitable factor during some assisted reproduction technology procedures, which results in poor fertilization rates and impairs embryo development. We found that fisetin, a bioactive flavonol contained in fruits and vegetables, delayed postovulatory oocyte aging in mice. Fisetin improved the development of aged oocytes after fertilization and inhibited the Sirt1 reduction in aged oocytes. Fisetin increased the GSH level and Sod2 transcription level to inhibit ROS accumulation in aged oocytes. Meanwhile, fisetin attenuated aging-induced spindle abnormalities, mitochondrial dysfunction, and apoptosis. At the molecular level, fisetin decreased aging-induced aberrant expression of H3K9me3. In addition, fisetin increased the expression levels of the mitochondrial transcription factor Tfam and the mitochondrial genes Co2 and Atp8 by upregulating Sirt1 in aged oocytes. Finally, inhibition of Sirt1 reversed the anti-aging effects of fisetin. Taken together, fisetin delayed postovulatory oocyte aging by upregulating Sirt1.
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Affiliation(s)
- Xupeng Xing
- National Engineering Research Center for Breeding Swine Industry, South China Agricultural University, Guangzhou 510642, China
- Gene Bank of GuangDong Local Livestock and Poultry, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
- State Key Laboratory of Livestock and Poultry Breeding, South China Agricultural University, Guangzhou 510642, China
| | - Yalin Liang
- National Engineering Research Center for Breeding Swine Industry, South China Agricultural University, Guangzhou 510642, China
- Gene Bank of GuangDong Local Livestock and Poultry, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
- State Key Laboratory of Livestock and Poultry Breeding, South China Agricultural University, Guangzhou 510642, China
| | - Yanan Li
- National Engineering Research Center for Breeding Swine Industry, South China Agricultural University, Guangzhou 510642, China
- Gene Bank of GuangDong Local Livestock and Poultry, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
- State Key Laboratory of Livestock and Poultry Breeding, South China Agricultural University, Guangzhou 510642, China
| | - Yaolu Zhao
- National Engineering Research Center for Breeding Swine Industry, South China Agricultural University, Guangzhou 510642, China
- Gene Bank of GuangDong Local Livestock and Poultry, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
- State Key Laboratory of Livestock and Poultry Breeding, South China Agricultural University, Guangzhou 510642, China
| | - Yuxing Zhang
- National Engineering Research Center for Breeding Swine Industry, South China Agricultural University, Guangzhou 510642, China
- Gene Bank of GuangDong Local Livestock and Poultry, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
- State Key Laboratory of Livestock and Poultry Breeding, South China Agricultural University, Guangzhou 510642, China
| | - Zheng Li
- National Engineering Research Center for Breeding Swine Industry, South China Agricultural University, Guangzhou 510642, China
- Gene Bank of GuangDong Local Livestock and Poultry, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
- State Key Laboratory of Livestock and Poultry Breeding, South China Agricultural University, Guangzhou 510642, China
| | - Zicong Li
- National Engineering Research Center for Breeding Swine Industry, South China Agricultural University, Guangzhou 510642, China
- Gene Bank of GuangDong Local Livestock and Poultry, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
- State Key Laboratory of Livestock and Poultry Breeding, South China Agricultural University, Guangzhou 510642, China
| | - Zhenfang Wu
- National Engineering Research Center for Breeding Swine Industry, South China Agricultural University, Guangzhou 510642, China
- Gene Bank of GuangDong Local Livestock and Poultry, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
- State Key Laboratory of Livestock and Poultry Breeding, South China Agricultural University, Guangzhou 510642, China
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Biswas D, Hyun SH. Supplementation of fetal bovine serum increased the quality of in vitro fertilized porcine embryo. J Adv Vet Anim Res 2022; 8:589-596. [PMID: 35106298 PMCID: PMC8757674 DOI: 10.5455/javar.2021.h549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 09/26/2021] [Accepted: 10/07/2021] [Indexed: 11/03/2022] Open
Abstract
Objective The present study aimed to explain the effect of fetal bovine serum (FBS) on the in vitro production of porcine embryos and the molecular effects of FBS on the growing of porcine embryos. Materials and Methods Immature porcine oocytes were matured and fertilized in vitro. The resulting zygotes were cultured in porcine zygotic medium-3- until day 7 and FBS was added on day 4. Without FBS, it was treated as a control group. Quantitative real-time PCR and 2',7'-dichloro-dihydro-fluorescein diacetate (H2DCFDA) molecular staining techniques were used to detect the expression patterns of apoptosis-associated genes and the accumulation of reactive oxygen species (ROS), respectively. Paired student's t-test was used by GraphPad Prism statistical software. Results FBS supplementation boosted blastocyst (BL) development and total cell count per BL substantially (p < 0.05). However, hatching and hatched BLs also increased in the FBS-treated group compared to the control. We also found that ROS accumulation in FBS-treated embryos was significantly reduced (p < 0.05) compared to the control group. The expression of the anti-apoptotic gene BCL-2 was significantly increased in FBS-treated BLs, but the pro-apoptotic gene, caspase-3 expression, was significantly reduced in FBS-treated BLs. Conclusion Our results suggest that FBS supplementation in porcine culture media could increase porcine embryo production by decreasing ROS accumulation and increasing the anti-apoptotic gene expression in developing BLs.
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Affiliation(s)
- Dibyendu Biswas
- Laboratory of Veterinary Embryology and Biotechnology, College of Veterinary Medicine, Chungbuk National University, Chungbuk 28644, Republic of Korea.,Department of Medicine, Surgery and Obstetrics, Faculty of Animal Science and Veterinary Medicine, Patuakhali Science and Technology University, Barisal campus, Bangladesh
| | - Sang Hwan Hyun
- Laboratory of Veterinary Embryology and Biotechnology, College of Veterinary Medicine, Chungbuk National University, Chungbuk 28644, Republic of Korea
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Boldura OM, Marc S, Otava G, Hutu I, Balta C, Tulcan C, Mircu C. Utilization of Rosmarinic and Ascorbic Acids for Maturation Culture Media in Order to Increase Sow Oocyte Quality Prior to IVF. Molecules 2021; 26:7215. [PMID: 34885797 PMCID: PMC8659116 DOI: 10.3390/molecules26237215] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Revised: 11/22/2021] [Accepted: 11/25/2021] [Indexed: 11/25/2022] Open
Abstract
The beneficial effect of antioxidant supplementation in maturation culture media of sow oocytes was evaluated by the expression quantification of apoptotic genes and the genes that ensure stability of germ cells during fertilization. The oocytes were cultivated for 44 h in conventional medium (C) or in medium supplemented with 105 µM rosmarinic acid (R) and 0.5 mM ascorbic acid (A) and classified into three quality classes by morphological observation from which the total RNA was isolated. The gene expression of Ptx3 and the apoptotic regulator p53, Bax and BCL-2 were evaluated by quantitative PCR technique. The decreased expression of the Bax gene in the A and R groups, compared to the control, indicates a protective role of antioxidants in the cells. Cell homeostasis was maintained, as reflected in the ratio of Bax/Bcl-2 in class I COCs (cumulus-oocyte complex) regardless of the experimental group, indicating minimum cellular stress. The expression of p53 genes was higher in all class III COC, but in A1 and R1 the expression was lower than in C1, and a similar Ptx-3 gene decreased significantly in groups A1, A2, A3 and R1 compared with control groups. Antioxidant supplementation showed beneficial effects on all morphological classes of pig COCs.
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Affiliation(s)
- Oana-Maria Boldura
- Faculty of Veterinary Medicine, Banat’s University of Agricultural Sciences and Veterinary Medicine “King Michael I” Timisoara, 300645 Timişoara, Romania; (O.-M.B.); (S.M.); (G.O.); (I.H.); (C.M.)
- BUASVM’s Research Institute for Biosecurity and Bioengineering, University of Agricultural Sciences and Veterinary Medicine ”King Michael I of Romania” from Timisoara, 300645 Timişoara, Romania
| | - Simona Marc
- Faculty of Veterinary Medicine, Banat’s University of Agricultural Sciences and Veterinary Medicine “King Michael I” Timisoara, 300645 Timişoara, Romania; (O.-M.B.); (S.M.); (G.O.); (I.H.); (C.M.)
- BUASVM’s Research Institute for Biosecurity and Bioengineering, University of Agricultural Sciences and Veterinary Medicine ”King Michael I of Romania” from Timisoara, 300645 Timişoara, Romania
| | - Gabriel Otava
- Faculty of Veterinary Medicine, Banat’s University of Agricultural Sciences and Veterinary Medicine “King Michael I” Timisoara, 300645 Timişoara, Romania; (O.-M.B.); (S.M.); (G.O.); (I.H.); (C.M.)
- BUASVM’s Research Institute for Biosecurity and Bioengineering, University of Agricultural Sciences and Veterinary Medicine ”King Michael I of Romania” from Timisoara, 300645 Timişoara, Romania
| | - Ioan Hutu
- Faculty of Veterinary Medicine, Banat’s University of Agricultural Sciences and Veterinary Medicine “King Michael I” Timisoara, 300645 Timişoara, Romania; (O.-M.B.); (S.M.); (G.O.); (I.H.); (C.M.)
- BUASVM’s Research Institute for Biosecurity and Bioengineering, University of Agricultural Sciences and Veterinary Medicine ”King Michael I of Romania” from Timisoara, 300645 Timişoara, Romania
| | - Cornel Balta
- Institute of Life Sciences, Vasile Goldis Western University of Arad, 310414 Arad, Romania;
| | - Camelia Tulcan
- Faculty of Veterinary Medicine, Banat’s University of Agricultural Sciences and Veterinary Medicine “King Michael I” Timisoara, 300645 Timişoara, Romania; (O.-M.B.); (S.M.); (G.O.); (I.H.); (C.M.)
- BUASVM’s Research Institute for Biosecurity and Bioengineering, University of Agricultural Sciences and Veterinary Medicine ”King Michael I of Romania” from Timisoara, 300645 Timişoara, Romania
| | - Calin Mircu
- Faculty of Veterinary Medicine, Banat’s University of Agricultural Sciences and Veterinary Medicine “King Michael I” Timisoara, 300645 Timişoara, Romania; (O.-M.B.); (S.M.); (G.O.); (I.H.); (C.M.)
- BUASVM’s Research Institute for Biosecurity and Bioengineering, University of Agricultural Sciences and Veterinary Medicine ”King Michael I of Romania” from Timisoara, 300645 Timişoara, Romania
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Bezerra FTG, Dau AMP, Van Den Hurk R, Silva JRV. Molecular characteristics of oocytes and somatic cells of follicles at different sizes that influence in vitro oocyte maturation and embryo production. Domest Anim Endocrinol 2021; 74:106485. [PMID: 32858464 DOI: 10.1016/j.domaniend.2020.106485] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Revised: 04/11/2020] [Accepted: 04/14/2020] [Indexed: 11/18/2022]
Abstract
During the last 10 to 15 yr, in vitro research to predict antral follicle growth and oocyte maturation has delivered interesting advances in the knowledge of processes regulating follicle growth and developmental competence of oocytes. This review discusses the contribution of cumulus and mural granulosa cells in the process of oocyte maturation and cumulus expansion in cumulus-oocyte complexes (COCs) from follicles of different sizes and shows that differences in gene expression in oocytes, granulosa, and theca cells of small and large follicles impact the success of in vitro blastocyst development. In addition, the molecular mechanisms by which COC metabolism and antioxidant defense provide oocyte competence are highlighted. Furthermore, new insights and perspectives on molecular and cellular regulation of in vitro oocyte maturation are emphasized.
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Affiliation(s)
- F T G Bezerra
- Laboratory of Biotechnology and Physiology of Reproduction (LABIREP), Graduation School of Biotechnology, Federal University of Ceara, Campus of Sobral, Sobral, Ceará, Brazil
| | - A M P Dau
- Federal Institute of Education, Science and Technology of Rio Grande do Sul, Rolante, Rio Grande do Sul, Brazil
| | - R Van Den Hurk
- Department of Pathobiology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, the Netherlands
| | - J R V Silva
- Laboratory of Biotechnology and Physiology of Reproduction (LABIREP), Graduation School of Biotechnology, Federal University of Ceara, Campus of Sobral, Sobral, Ceará, Brazil.
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Malekzadeh Kebria M, Salehnia M, Zavareh S, Moazzeni SS. The effect of sodium selenite on apoptotic gene expression and development of in vitro cultured mouse oocytes in comparison with in vivo obtained oocytes. VETERINARY RESEARCH FORUM : AN INTERNATIONAL QUARTERLY JOURNAL 2020; 11:377-383. [PMID: 33643591 PMCID: PMC7904118 DOI: 10.30466/vrf.2018.93471.2255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Accepted: 12/04/2018] [Indexed: 11/13/2022]
Abstract
In vitro maturation (IVM) of oocytes is widely used in assisted reproduction technologies. The present study aimed to improve the in vitro oocyte maturation and its development through enriching the culture media with sodium selenite (SS). Moreover, the effects of SS on the expression of the oocytes apoptosis-related genes were assessed. In this study, male and female NMRI mice were used and after collecting their germinal vesicle (GV) oocytes, they were cultured with SS (experimental group) and without SS (control group). Collected metaphase II oocytes (MII) from the fallopian tube were considered as in vivo group. After in vitro culture, the oocytes were assessed in terms of nuclear maturation. The MII oocytes were inseminated and the development was examined until the blastocyst stage. Also, oocytes were subjected to the molecular analysis for evaluating the expression of BAX, BCL2, P53, and BAD genes using the real-time RT-PCR. The maturation rate was significantly increased in the SS supplemented group compared to the control one. The developmental rate of the embryos was significantly higher for both of the in vivo and SS supplemented groups rather than the control one, however, no significant difference was seen between these rates of the experimental and in vivo groups. Real-time RT-PCR did not show any significant differences in the expression of the apoptosis-related genes for all of the studied groups. The p53 gene was not expressed in any of groups. Sodium selenite improved the oocyte developmental competence but did not change the expression of the apoptosis-related genes in MII oocytes.
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Affiliation(s)
| | - Mojdeh Salehnia
- Department of Anatomy, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran;
| | - Saeed Zavareh
- Department of Cellular and Molecular Biology, School of Biology, Damghan University, Damghan, Iran;
- Institute of Biological Sciences, Damghan University, Damghan, Iran;
| | - Seyyed Saeed Moazzeni
- Prevention of Metabolic Research Disorder Center, Research Institute for Endocrine Disorder, Shahid Beheshti University of Medical Science, Tehran, Iran.
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Porcine follicular fluid derived from > 8 mm sized follicles improves oocyte maturation and embryo development during in vitro maturation of pigs. ZYGOTE 2020; 29:27-32. [PMID: 32959753 DOI: 10.1017/s0967199420000398] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The aim of the present study was to investigate the effects of porcine follicular fluid (pFF) from large-sized (LFF; >8 mm in diameter) and medium-sized (MFF; 3-6 mm in diameter) follicles on the maturation and developmental competence of porcine oocytes. Cumulus-oocyte complexes (COCs) were collected from follicles 3-6 mm in diameter. The collected COCs were incubated for 22 h with LFF or MFF (in vitro maturation (IVM)-I stage) and were incubated subsequently for 22 h with LFF or MFF (IVM-II stage). Cumulus expansion was confirmed after the IVM-I stage and nuclear maturation was evaluated after the IVM-II stage. Intracellular glutathione (GSH) and reactive oxygen species (ROS) levels were measured and embryonic development was evaluated. Relative cumulus expansion and GSH levels were higher in the LFF group compared with in the MFF group after the IVM-I stage (P < 0.05). After the IVM-II stage, the numbers of oocytes in metaphase-II were increased in the LFF group and GSH content was higher in all of the LFF treatment groups compared with in the MFF treatment groups during both IVM stages (P < 0.05). ROS levels were reduced by LFF treatment regardless of IVM stage (P < 0.05). Blastocyst formation and the total numbers of cells in blastocysts were increased in all LFF treatment groups compared with the control group (P < 0.05). These results suggested that pFF from large follicles at the IVM stage could improve nucleic and cytoplasmic maturation status and further embryonic development through reducing ROS levels and enhancing responsiveness to gonadotropins.
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Effects of oxygen concentrations on developmental competence and transcriptomic profile of yak oocytes. ZYGOTE 2020; 28:459-469. [PMID: 32772955 DOI: 10.1017/s0967199420000337] [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] [Indexed: 11/06/2022]
Abstract
Oxygen concentration influences oocyte quality and subsequent embryo development, but it remains unclear whether oxygen concentrations affect the developmental competence and transcriptomic profile of yak oocytes. In this study, we investigated the effects of different oxygen concentrations (5% versus 20%) on the developmental competence, reactive oxygen species (ROS) levels, glutathione (GSH) content, and transcriptomic profile of yak oocytes. The results showed that a low oxygen concentration significantly increased the maturation rate of yak oocytes (81.2 ± 2.2% vs 75.9 ± 1.3%) and the blastocyst quality of yak in vitro fertilized embryos. Analysis of ROS and GSH showed that a low oxygen concentration reduced ROS levels and increased the content of GSH (75.05 ± 7.1 ng/oocyte vs 50.63 ± 5.6 ng/oocyte). Furthermore, transcriptomic analysis identified 120 differentially expressed genes (DEGs) between the two groups of oocytes. Gene enrichment analysis of the DEGs indicated multiple cellular processes, including oxidative phosphorylation, transcription regulation, mitochondrial regulation, oestrogen signalling pathway, HIF-1 signalling pathway, TNF signalling pathway, were involved in the response to oxygen concentration alterations. Taken together, these results indicated that a low oxygen concentration improved the developmental competence of yak oocytes.
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Hosseinzadeh Shirzeyli M, Amidi F, Shamsara M, Nazarian H, Eini F, Hosseinzadeh Shirzeyli F, Majidi Zolbin M, Ghaffari Novin M, Daliri Joupari M. Exposing Mouse Oocytes to MitoQ During In Vitro Maturation Improves Maturation and Developmental Competence. IRANIAN JOURNAL OF BIOTECHNOLOGY 2020; 18:e2454. [PMID: 33850943 PMCID: PMC8035425 DOI: 10.30498/ijb.2020.154641.2454] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Background and Purpose: Mitochondrion is the main indicator of oocyte quality and one of the components of oocyte, which is sensitive to oxidative damage during the maturation process. Mitoquinone mesylate (MitoQ) is a strong antioxidant targeting mitochondria as well as anti-apoptotic agent. However, the effect of MitoQ on the quality of oocytes during in vitro maturation (IVM) is still unknown. Objectives: This study investigated the possible effects of MitoQ on maturation and developmental competency in mice oocytes. Materials and Methods: The oocytes were collected at germinal vesicle stage from 6-8-week old female NMRI mice and then cultured in TCM-199 medium supplemented with 0, 0.01, 0.02 and 0.04 µM MitoQ. The sham group was treated with DMSO (0.01% v.v). Then intracellular Glutathione (GSH), reactive oxygen species (ROS) levels, mitochondria membrane potential (ΔΨm), as well as in vitro fertilization (IVF) rate in the 18-20 h matured oocytes and metaphase II (MII) oocytes (in vivo-control), were assessed. Results: The results showed that between three dose of MitoQ, the 0.02 µM significantly increased nuclear maturation rate, GSH level, fertilization rate and blastulation (92.6, 231.7, 90.19 and 81.66%, respectively) than the in vitro-control (71.14, 152, 78.84 and 73.50%, respectively) and more comparable to that of the in vivo matured oocytes (100, 243.5, 92.10 and 83%, respectively). Also, the mitochondria membrane potential in the 0.02 µM MitoQ was significantly higher compared with those in the other groups (4.4). However, the intracellular ROS level in 0.02 µM MitoQ was significantly decreased (38.72%) compared to in vitro-control (82.2%) and was similar to the in vivo-control (33.5%). Conclusion: The results indicated that supplementation of IVM medium with MitoQ (specially 0.02 µM) enhance maturation and fertilization rate. In conclusion, MitoQ might be considered as a novel component that could be added to IVM media.
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Affiliation(s)
| | - Fardin Amidi
- Department of Anatomical Sciences, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Mehdi Shamsara
- Department of Animal and Marine Biotechnology, National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran
| | - Hamid Nazarian
- Department of Anatomical Sciences, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Fatemeh Eini
- Fertility and Infertility Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
| | - Farhad Hosseinzadeh Shirzeyli
- Department of Animal Science, Faculty of Agriculture and Natural Resources, Science and Research branch, Islamic Azad University, Tehran, Iran
| | - Masoumeh Majidi Zolbin
- Department of Anatomical Sciences, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Marefat Ghaffari Novin
- Cellular and Molecular Biology Research Center, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Morteza Daliri Joupari
- Department of Animal and Marine Biotechnology, National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran
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Loren P, Sánchez-Villalba E, Risopatrón J, Arias ME, Felmer R, Sánchez R. Induction of oxidative stress does not increase the cryotolerance of vitrified embryos. Anim Reprod Sci 2020; 219:106511. [PMID: 32828397 DOI: 10.1016/j.anireprosci.2020.106511] [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: 11/15/2019] [Revised: 05/22/2020] [Accepted: 05/23/2020] [Indexed: 10/24/2022]
Abstract
Short-term treatment of mammalian oocytes with different stressors induces stress tolerance of embryos derived from these oocytes. The aims of this study were to evaluate effects on embryo development when there was treatment of oocyte complexes (COCs) used to derive the embryos with hydrogen peroxide (H2O2).The COCs were not incubated with H2O2: control (0 μM), or were incubated with 25, 50, 75, or 100 μM concentrations of H2O2 for 1 h prior to in vitro fertilization, and presumptive zygotes were cultured until day 7. Blastocysts at day 7 of development derived from H2O2-treated (25 μM treatment concentration) COCs were vitrified. Percentage of embryos undergoing cleavage was not affected by any treatment, while percentage of embryos developing to the blastocyst stage was less when there was treatment of COCs with 100 μM of H2O2. Embryo quality was less when COCs used to derive blastocysts were treated with 50, 75, or 100 μM concentrations of H2O2. There were lesser relative abundances of some mRNA transcripts of interest in blastocysts when there was treatment of COCs with H2O2. After vitrification, there were no differences in embryo re-expansion and hatching rates compared with fresh and vitrified blastocysts of the control group and those derived from COCs treated with 25 μM H2O2. In conclusion, treatment of COCs used to derive blastocysts with H2O2 does not induce stress tolerance in vitrified embryos of cattle; however, the viability of these blastocysts is similar to those of the control group.
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Affiliation(s)
- P Loren
- Applied Cellular and Molecular Biology Program, Universidad de La Frontera, Temuco, Chile
| | - E Sánchez-Villalba
- Applied Cellular and Molecular Biology Program, Universidad de La Frontera, Temuco, Chile
| | - J Risopatrón
- Department of Basic Sciences, Faculty of Medicine, Universidad de La Frontera, Temuco, Chile
| | - M E Arias
- Department of Animal Production, Faculty of Agriculture and Forestry Sciences, Universidad de La Frontera, Temuco, Chile
| | - R Felmer
- Department of Agricultural Sciences and Natural Resources, Faculty of Agriculture and Forestry Sciences, Universidad de La Frontera, Temuco, Chile
| | - R Sánchez
- Department of Preclinical Sciences, Faculty of Medicine, Universidad de La Frontera, Temuco, Chile.
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IMD/ADM2 1-47, a factor that improves embryo quality. Theriogenology 2020; 146:1-13. [PMID: 32035360 DOI: 10.1016/j.theriogenology.2020.01.049] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 01/16/2020] [Accepted: 01/26/2020] [Indexed: 11/22/2022]
Abstract
Starting in vitro fertilization process with competent oocytes that may endure first cellular divisions is a critical step for obtaining an embryo. To obtain in vitro competent oocytes, culture conditions should emulate the in vivo microenvironment as close as possible. With the aim of improving the in vitro culture medium, the present study evaluated the IMD/ADM21-47 peptide as a factor that promotes oocyte competence and improves embryo quality in bovine systems. The culture supplemented with 153 μg/mL of IMD/ADM21-47 was correlated with the production of healthy oocytes in metaphase II (MII) stage in compacted cumulus-oocyte complexes (COC) with a decrease of BAX/BCL-2 to mRNA ratio and a reduction of late apoptosis by TUNEL in MII oocytes. In addition to this, treatment with IMD/ADM21-47 caused cAMPi level to be constant over time, and the cAMPi level kept increasing until 6 h. COC supplementation with 153 μg/mL of IMD/ADM21-47 increased the blastocyst production rate two-fold in comparison with control conditions. Only embryos from COC treatment with this peptide were capable of developing blastocysts in stage-6 grade I; compared with the control culture, it was the treatment with the greater number of blastocysts stage-5; these are characteristics of good quality blastocysts.
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Plasma Metabolic Characterisation of Dairy Cows with Inactive Ovaries and Oestrus During the Peak of Lactation. J Vet Res 2019; 63:359-367. [PMID: 31572816 PMCID: PMC6749744 DOI: 10.2478/jvetres-2019-0047] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Accepted: 07/16/2019] [Indexed: 11/28/2022] Open
Abstract
Introduction Differential metabolites (DMs) between cows with inactive ovaries (IO) and oestrous (E) cows were screened and metabolic pathways of DMs associated with IO were determined. Material and Methods Cows at 50 to 60 days (d) postpartum from an intensive dairy farm were randomly selected and allocated into an E group (n = 16) or an IO group (n = 16) according to a pedometer and rectal examinations. Their plasma samples were analysed by liquid chromatography–mass spectrometry (LC–MS) to compare plasma metabolic changes between the E and IO groups. Multivariate pattern recognition was used to screen the DMs in the plasma of IO cows. Results Compared with normal E cows, there were abnormalities in 20 metabolites in IO cows, including a significantly decreased content (VIP > 1, P < 0.05) of cholic acid, p-chlorophenylalanine, and arachidonic acid, and a significantly increased content (VIP > 1, P < 0.05) of tyramine, betaine, L-phenylalanine, L-glutamate, D-proline, L-alanine, and L-pyrophosphate. Five DMs (cholic acid, D-proline, L-glutamate, L-alanine, and L-pyroglutamic acid) with higher variable importance in projection (VIP) values between groups were validated by ELISA with blind samples of re-selected cows (IO, 50 to 60 d postpartum) and the validated results were consistent with the LC–MS results. Conclusion The 20 DMs in IO cows during the peak of lactation indicated that the pathogenesis of IO was involved in complex metabolic networks and signal transduction pathways. This study provides a basis for further exploration of the pathogenesis and prevention of IO in cows in the future.
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Soto-Heras S, Menéndez-Blanco I, Catalá MG, Izquierdo D, Thompson JG, Paramio MT. Biphasic in vitro maturation with C-type natriuretic peptide enhances the developmental competence of juvenile-goat oocytes. PLoS One 2019; 14:e0221663. [PMID: 31442286 PMCID: PMC6707569 DOI: 10.1371/journal.pone.0221663] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Accepted: 08/12/2019] [Indexed: 12/21/2022] Open
Abstract
In vitro embryo production success in juvenile animals is compromised due to their intrinsic lower oocyte quality. Conventional in vitro maturation (IVM) impairs oocyte competence by inducing spontaneous meiotic resumption. A series of experiments were performed to determine if maintaining meiotic arrest during a pre-maturation culture phase (pre-IVM) prior to conventional IVM improves oocyte competence of juvenile-goat (2 months old) cumulus-oocyte complexes (COCs). In experiment 1, COCs were cultured with C-type natriuretic peptide (CNP; 0, 50, 100, 200 nM) for 6 and 8 h. Nuclear stage was assessed, revealing no differences in the incidence of germinal vesicle (GV) breakdown. In experiment 2, the same CNP concentrations were assessed plus 10 nM estradiol, the known upstream agonist activating expression of NPR2, the exclusive receptor of CNP. CNP (200 nM) plus estradiol increased the rate of oocytes at GV stage at 6 h compared to control group (74.7% vs 28.3%; P<0.05) with predominantly condensed chromatin configuration. In experiment 3, relative mRNA quantification revealed NPR2 expression was down-regulated after pre-IVM (6 h). In experiment 4, analysis of transzonal projections indicated that pre-IVM maintained cumulus-oocyte communication after oocyte recovery. For experiments 5 and 6, biphasic IVM (6 h pre-IVM with CNP and estradiol, plus 24 h IVM) and control IVM (24 h) were compared. Biphasic IVM increased intra-oocyte glutathione and decreased ROS, up-regulated DNA-methyltransferase 1 and pentraxin 3 expression and led to an increase in rate of blastocyst development compared to control group (30.2% vs 17.2%; P<0.05). In conclusion, a biphasic IVM, including a pre-IVM with CNP, maintains oocyte meiotic arrest for 6 h and enhances the embryo developmental competence of oocytes from juvenile goats.
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Affiliation(s)
- Sandra Soto-Heras
- Departament de Ciència Animal i dels Aliments, Facultat de Veterinària, Universitat Autònoma de Barcelona, Bellaterra, Barcelona, Spain
| | - Irene Menéndez-Blanco
- Departament de Ciència Animal i dels Aliments, Facultat de Veterinària, Universitat Autònoma de Barcelona, Bellaterra, Barcelona, Spain
| | - Maria-Gracia Catalá
- Departament de Ciència Animal i dels Aliments, Facultat de Veterinària, Universitat Autònoma de Barcelona, Bellaterra, Barcelona, Spain
| | - Dolors Izquierdo
- Departament de Ciència Animal i dels Aliments, Facultat de Veterinària, Universitat Autònoma de Barcelona, Bellaterra, Barcelona, Spain
| | - Jeremy G. Thompson
- Robinson Research Institute, School of Paedriatics and Reproductive Health, The University of Adelaide, Adelaide, South Australia, Australia
- Adelaide Medical School, The University of Adelaide, Adelaide, South Australia, Australia
- Australian Research Council Centre of Excellence for Nanoscale BioPhotonics and Institute for Photonics and Advanced Sensing, Davies Research Centre, The University of Adelaide, Adelaide, South Australia, Australia
| | - Maria-Teresa Paramio
- Departament de Ciència Animal i dels Aliments, Facultat de Veterinària, Universitat Autònoma de Barcelona, Bellaterra, Barcelona, Spain
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13
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Eini F, Bidadkosh A, Nazarian H, Piryaei A, Ghaffari Novin M, Joharchi K. Thymoquinone reduces intracytoplasmic oxidative stress and improves epigenetic modification in polycystic ovary syndrome mice oocytes, during in-vitro maturation. Mol Reprod Dev 2019; 86:1053-1066. [PMID: 31209968 DOI: 10.1002/mrd.23222] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 05/16/2019] [Accepted: 05/23/2019] [Indexed: 11/08/2022]
Abstract
Although in-vitro maturation (IVM) of oocytes has been presented as an alternative treatment to traditional stimulated in-vitro fertilization, the culture condition can be improved by natural antioxidants. Thus, we investigated the protective effect of Thymoquinone (TQ) during IVM in the polycystic ovary syndrome (PCOS) mice model. The induction of PCOS was made by dehydroepiandrosterone via subcutaneous injection, in prepubertal female B6D2F1-mice. After 21 days later, germinal vesicle (GV)-stage-oocytes were extracted and incubated in IVM media containing 0, 1.0, 10.0, and 100.0 μM of TQ. To assess fertilization and blastulation rates, after 22-24 hr, the treated oocytes were fertilized in-vitro with epididymal spermatozoa. Some other oocytes were evaluated for maturation, epigenetic, and oxidative stress markers. Similarly, the mRNA expression of epigenetic enzymes genes (Dnmt1 and Hdac1), three maternally derived genes (Mapk, CyclinB, and Cdk1) and apoptosis-related genes (Bax and Bcl2) were assessed. Our results showed that the maturation, fertilization, and blastulation rates were significantly higher in the 10.0 μM TQ-treated group compared with the untreated group and likewise with in-vivo matured oocytes. The Bax expression was reduced in 10.0 μM TQ matured oocytes, but Bcl2, Dnmt1, Hdac1, Cdk1, and Mapk were upregulated in this group compared to other groups. Furthermore, dimethylation of histone-3 at lysine-9 (H3K9m2) and DNA methylation were significantly increased whereas H4K12 acetylation (H4K12ac) was decreased in the 10.0 μM TQ-treated group in comparison with control and in-vivo matured oocytes. Therefore, our results are suggesting that 10.0 μM TQ may enhance the developmental competence of PCOS oocytes via the modulation of oxidative stress and epigenetic alterations.
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Affiliation(s)
- Fatemeh Eini
- Fertility and Infertility Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, Iran.,Department of Biology and Anatomical Sciences, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Arash Bidadkosh
- Department of Nephrology, Royal Alexandra, Hospital for Children, University of Sydney, Sydney, New South Wales, Australia
| | - Hamid Nazarian
- Department of Biology and Anatomical Sciences, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Abbas Piryaei
- Department of Biology and Anatomical Sciences, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Marefat Ghaffari Novin
- Department of Biology and Anatomical Sciences, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Khojasteh Joharchi
- Department of Pharmacology, School of Medicine and Neuroscience Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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14
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Soto-Heras S, Catalá MG, Roura M, Menéndez-Blanco I, Piras AR, Izquierdo D, Paramio MT. Effects of melatonin on oocyte developmental competence and the role of melatonin receptor 1 in juvenile goats. Reprod Domest Anim 2018; 54:381-390. [PMID: 30444551 DOI: 10.1111/rda.13378] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Accepted: 10/29/2018] [Indexed: 01/02/2023]
Abstract
Melatonin enhances in vitro embryo development in several species by improving the oocyte developmental competence during in vitro maturation (IVM). Melatonin has a wide range of actions, from scavenging reactive oxygen species (ROS) to regulating gene expression, and it can also act by way of melatonin receptors. The aim of this study was to determine the mechanism of action of melatonin during the IVM of juvenile goat oocytes and the role of the membrane receptors. Melatonin receptor 1 was immunolocalized in cumulus cells and oocytes before and after 24 hr of IVM. The effect of melatonin on oocyte developmental competence was tested in three experimental IVM groups: (a) control, (b) 10-7 M melatonin, and (c) 10-7 M melatonin +10-7 M luzindole (an inhibitor of both melatonin receptors). After IVM oocytes were assessed for ROS levels, mitochondrial activity, adenosine 5'-triphosphate (ATP) concentration and relative gene expression (ACTB, SLC1A1, SOD1, GPx1, BAX, DNMT1, GCLC and GDF9). IVM-oocytes were in vitro fertilized and cultured under conventional conditions. Blastocyst rate and quality (differential cell count) were assessed at 8 days post-fertilization. Melatonin decreased ROS levels, increased mitochondrial activity and ATP content and increased blastocyst quality compared to control group (55.8 vs. 30.4 inner cell mass ICM, p < 0.05). There was no effect on the relative gene expression due to treatment with melatonin. In conclusion, we have showed that melatonin improves oocyte developmental competence in juvenile goats by reducing ROS levels and improving mitochondrial activity.
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Affiliation(s)
- Sandra Soto-Heras
- Departament de Ciència Animal i dels Aliments, Facultat de Veterinària, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Maria-Gracia Catalá
- Departament de Ciència Animal i dels Aliments, Facultat de Veterinària, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Montserrat Roura
- Departament de Ciència Animal i dels Aliments, Facultat de Veterinària, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Irene Menéndez-Blanco
- Departament de Ciència Animal i dels Aliments, Facultat de Veterinària, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Anna-Rita Piras
- Department of Veterinary Medicine, Università degli Studi di Sassari, Sardegna, Italy
| | - Dolors Izquierdo
- Departament de Ciència Animal i dels Aliments, Facultat de Veterinària, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Maria-Teresa Paramio
- Departament de Ciència Animal i dels Aliments, Facultat de Veterinària, Universitat Autònoma de Barcelona, Barcelona, Spain
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15
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Maruri A, Cruzans PR, Lorenzo MS, Tello MF, Teplitz GM, Carou MC, Lombardo DM. Embryotrophic effect of a short-term embryo coculture with bovine luteal cells. Theriogenology 2018; 119:143-149. [DOI: 10.1016/j.theriogenology.2018.06.032] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 06/28/2018] [Accepted: 06/29/2018] [Indexed: 12/24/2022]
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16
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Soto-Heras S, Roura M, Catalá MG, Menéndez-Blanco I, Izquierdo D, Fouladi-Nashta AA, Paramio MT. Beneficial effects of melatonin on in vitro embryo production from juvenile goat oocytes. Reprod Fertil Dev 2018. [PMID: 28625274 DOI: 10.1071/rd17170] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Melatonin is a universal antioxidant that improves in vitro embryo production in several species. The aims of this study were to determine the melatonin concentration in the ovarian follicular fluid (FF) of juvenile goats and the effect of melatonin during in vitro maturation (IVM) on embryo development. The FF melatonin concentration was 0.57--1.07×10-9 M, increasing with follicular diameter. Oocytes were matured, fertilised and cultured under conventional conditions. Blastocyst development, embryo quality and levels of reactive oxygen species (ROS) and reduced glutathione were assessed. In Experiment 1 different melatonin concentrations (10-3, 10-7, 10-9, 10-11 M) were added to the IVM medium, which contained cysteamine as antioxidant, and no differences were observed. In Experiment 2, melatonin (10-7 M) was tested in the presence or absence of cysteamine (experimental groups: melatonin, cysteamine, melatonin+cysteamine, non-antioxidant). The melatonin group presented a higher blastocyst rate than the non-antioxidant group (28.9 vs 11.7%; P<0.01) and a higher total cell number than the cysteamine group (225.1 vs 129.0; P<0.05). Oocytes from the melatonin and cysteamine groups had lower ROS levels than those from the non-antioxidant group. This study shows that melatonin is an interesting tool for improving oocyte competence in juvenile goats as it increases embryo production and quality.
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Affiliation(s)
- Sandra Soto-Heras
- Departament de Ciència Animal i dels Aliments, Facultat de Veterinària, Universitat Autònoma de Barcelona, Travessera dels Turons s/n, 08193 Bellaterra, Barcelona, Spain
| | - Montserrat Roura
- Departament de Ciència Animal i dels Aliments, Facultat de Veterinària, Universitat Autònoma de Barcelona, Travessera dels Turons s/n, 08193 Bellaterra, Barcelona, Spain
| | - Maria G Catalá
- Departament de Ciència Animal i dels Aliments, Facultat de Veterinària, Universitat Autònoma de Barcelona, Travessera dels Turons s/n, 08193 Bellaterra, Barcelona, Spain
| | - Irene Menéndez-Blanco
- Departament de Ciència Animal i dels Aliments, Facultat de Veterinària, Universitat Autònoma de Barcelona, Travessera dels Turons s/n, 08193 Bellaterra, Barcelona, Spain
| | - Dolors Izquierdo
- Departament de Ciència Animal i dels Aliments, Facultat de Veterinària, Universitat Autònoma de Barcelona, Travessera dels Turons s/n, 08193 Bellaterra, Barcelona, Spain
| | - Ali A Fouladi-Nashta
- Reproduction Genes and Development Group, Department of Veterinary Basic Sciences, The Royal Veterinary College, Hawkshead Lane, Hatfield, Herts AL97TA, UK
| | - Maria T Paramio
- Departament de Ciència Animal i dels Aliments, Facultat de Veterinària, Universitat Autònoma de Barcelona, Travessera dels Turons s/n, 08193 Bellaterra, Barcelona, Spain
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17
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Shin MY, Lee SE, Son YJ, Park YG, Jeong SG, Kim EY, Park SP. Lysophosphatidic acid accelerates development of porcine embryos by activating formation of the blastocoel. Mol Reprod Dev 2017; 85:62-71. [PMID: 29226557 DOI: 10.1002/mrd.22938] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Accepted: 11/29/2017] [Indexed: 01/14/2023]
Abstract
Culture media modifications, including the addition of various factors, are important for the in vitro production of oocytes and embryos. In this study, we investigated the effects of lysophosphatidic acid (LPA) on porcine embryo development. Porcine parthenogenetic embryos were cultured with 0, 0.1, 1, and 10 μM LPA for 7 days, or cultured in basic medium until Day 4 and then treated with LPA from Days 4 to 7. No difference in the in vitro development of embryos cultured with LPA for 7 days was observed. Conversely, rates of blastocyst and over-expanded blastocyst formation were higher in the 0.1 and 1 µM LPA-treated versus the other groups of embryos treated from Days 4 to 7. Moreover, formation of early blastocysts occurred earlier and embryo size was larger in LPA-treated compared to control embryos. Expression of Connexin 43 and gap junction and cell adhesion-related genes (GJC1 and CDH1, respectively) was also higher in LPA-treated compared to control embryos. Despite no difference in the blastocyst total cell number between groups, the apoptotic index was lower in the LPA-treated group than in the control group; indeed, BCL2L1 (B-cell lymphoma 2-like protein 1) expression increased while BAK (Bcl-2 homologous antagonist killer) decreased in the LPA-treated group. Thus, addition of LPA to the medium from Days 4 to 7 of culture improves blastocyst formation and aids the development of preimplantation embryos.
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Affiliation(s)
- Min-Young Shin
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju, Jeju Special Self-Governing Province, Korea.,Stem Cell Research Center, Jeju National University, Jeju, Jeju Special Self-Governing Province, Korea
| | - Seung-Eun Lee
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju, Jeju Special Self-Governing Province, Korea.,Stem Cell Research Center, Jeju National University, Jeju, Jeju Special Self-Governing Province, Korea
| | - Yeo-Jin Son
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju, Jeju Special Self-Governing Province, Korea.,Stem Cell Research Center, Jeju National University, Jeju, Jeju Special Self-Governing Province, Korea
| | - Yun-Gwi Park
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju, Jeju Special Self-Governing Province, Korea.,Stem Cell Research Center, Jeju National University, Jeju, Jeju Special Self-Governing Province, Korea
| | - Sang-Gi Jeong
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju, Jeju Special Self-Governing Province, Korea.,Stem Cell Research Center, Jeju National University, Jeju, Jeju Special Self-Governing Province, Korea
| | - Eun-Young Kim
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju, Jeju Special Self-Governing Province, Korea.,Stem Cell Research Center, Jeju National University, Jeju, Jeju Special Self-Governing Province, Korea.,Mirae Cell Bio, Gwangjin-gu, Seoul, Korea
| | - Se-Pill Park
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju, Jeju Special Self-Governing Province, Korea.,Stem Cell Research Center, Jeju National University, Jeju, Jeju Special Self-Governing Province, Korea.,Mirae Cell Bio, Gwangjin-gu, Seoul, Korea
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18
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Mun SE, Sim BW, Yoon SB, Jeong PS, Yang HJ, Choi SA, Park YH, Kim YH, Kang P, Jeong KJ, Lee Y, Jin YB, Song BS, Kim JS, Huh JW, Lee SR, Choo YK, Kim SU, Chang KT. Dual effect of fetal bovine serum on early development depends on stage-specific reactive oxygen species demands in pigs. PLoS One 2017; 12:e0175427. [PMID: 28406938 PMCID: PMC5391019 DOI: 10.1371/journal.pone.0175427] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Accepted: 03/24/2017] [Indexed: 12/20/2022] Open
Abstract
Despite the application of numerous supplements to improve in vitro culture (IVC) conditions of mammalian cells, studies regarding the effect of fetal bovine serum (FBS) on mammalian early embryogenesis, particularly in relation to redox homeostasis, are lacking. Herein, we demonstrated that early development of in vitro-produced (IVP) porcine embryos highly depends on the combination of FBS supplementation timing and embryonic reactive oxygen species (ROS) requirements. Interestingly, FBS significantly reduced intracellular ROS levels in parthenogenetically activated (PA) embryos regardless of the developmental stage. However, the beneficial effect of FBS on early embryogenesis was found only during the late phase (IVC 4-6 days) treatment group. In particular, developmental competence parameters, such as blastocyst formation rate, cellular survival, total cell number and trophectoderm proportion, were markedly increased by FBS supplementation during the late IVC phase. In addition, treatment with FBS elevated antioxidant transcript levels during the late IVC phase. In contrast, supplementation with FBS during the entire period (1-6 days) or during the early IVC phase (1-2 days) greatly impaired the developmental parameters. Consistent with the results from PA embryos, the developmental competence of in vitro fertilization (IVF) or somatic cell nuclear transfer (SCNT) embryos were markedly improved by treatment with FBS during the late IVC phase. Moreover, the embryonic stage-specific effects of FBS were reversed by the addition of an oxidant and were mimicked by treatment with an antioxidant. These findings may increase our understanding of redox-dependent early embryogenesis and contribute to the large-scale production of high-quality IVP embryos.
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Affiliation(s)
- Seong-Eun Mun
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do, Republic of Korea
- Futuristic Animal Resource & Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do, Republic of Korea
- Department of Biological Science, College of Natural Sciences, Wonkwang University, Jeollabuk-do, Republic of Korea
| | - Bo-Woong Sim
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do, Republic of Korea
- Futuristic Animal Resource & Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do, Republic of Korea
| | - Seung-Bin Yoon
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do, Republic of Korea
- Futuristic Animal Resource & Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do, Republic of Korea
| | - Pil-Soo Jeong
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do, Republic of Korea
- Futuristic Animal Resource & Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do, Republic of Korea
| | - Hae-Jun Yang
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do, Republic of Korea
- Futuristic Animal Resource & Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do, Republic of Korea
- Department of Biological Science, College of Natural Sciences, Wonkwang University, Jeollabuk-do, Republic of Korea
| | - Seon-A Choi
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do, Republic of Korea
- Futuristic Animal Resource & Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do, Republic of Korea
| | - Young-Ho Park
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do, Republic of Korea
- Futuristic Animal Resource & Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do, Republic of Korea
- Department of Functional Genomics, University of Science and Technology, Daejeon, Republic of Korea
| | - Young-Hyun Kim
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do, Republic of Korea
- Futuristic Animal Resource & Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do, Republic of Korea
- Department of Functional Genomics, University of Science and Technology, Daejeon, Republic of Korea
| | - Philyong Kang
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do, Republic of Korea
- Futuristic Animal Resource & Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do, Republic of Korea
| | - Kang-Jin Jeong
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do, Republic of Korea
- Futuristic Animal Resource & Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do, Republic of Korea
| | - Youngjeon Lee
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do, Republic of Korea
- Futuristic Animal Resource & Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do, Republic of Korea
| | - Yeung Bae Jin
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do, Republic of Korea
- Futuristic Animal Resource & Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do, Republic of Korea
| | - Bong-Seok Song
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do, Republic of Korea
- Futuristic Animal Resource & Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do, Republic of Korea
| | - Ji-Su Kim
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do, Republic of Korea
- Futuristic Animal Resource & Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do, Republic of Korea
- Department of Functional Genomics, University of Science and Technology, Daejeon, Republic of Korea
| | - Jae-Won Huh
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do, Republic of Korea
- Futuristic Animal Resource & Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do, Republic of Korea
- Department of Functional Genomics, University of Science and Technology, Daejeon, Republic of Korea
| | - Sang-Rae Lee
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do, Republic of Korea
- Futuristic Animal Resource & Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do, Republic of Korea
- Department of Functional Genomics, University of Science and Technology, Daejeon, Republic of Korea
| | - Young-Kuk Choo
- Department of Biological Science, College of Natural Sciences, Wonkwang University, Jeollabuk-do, Republic of Korea
| | - Sun-Uk Kim
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do, Republic of Korea
- Futuristic Animal Resource & Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do, Republic of Korea
- Department of Functional Genomics, University of Science and Technology, Daejeon, Republic of Korea
- * E-mail: (SUK); (KTC)
| | - Kyu-Tae Chang
- National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do, Republic of Korea
- Futuristic Animal Resource & Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do, Republic of Korea
- Department of Functional Genomics, University of Science and Technology, Daejeon, Republic of Korea
- * E-mail: (SUK); (KTC)
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19
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Satitmanwiwat S, Changsangfah C, Faisaikarm T, Promthep K, Thammawung S, Saikhun K, Kaeoket K. Proteome profiling of bovine follicular fluid-specific proteins and their effect on in vitro embryo development. J Vet Med Sci 2017; 79:842-847. [PMID: 28260700 PMCID: PMC5447970 DOI: 10.1292/jvms.16-0244] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The objective of this study was to determine the effect of bovine follicular fluid proteins (bFF) and their differently charged groups as maturation media supplements for in vitro embryo development. bFF was
obtained by aspiration from large healthy follicles (4–10 mm in diameter) and was precipitated by 30–50% (NH4)2SO4. The precipitated protein was fractionated into basic and acidic fractions by
ion-exchanger columns. In experiment 1, the oocytes were matured in TCM-199 with 1) FBS+hormones (control) and 2) 10% bFF. The oocyte maturation rate, the development to the blastocyst stage rate and blastocyst cell number were
not significantly different between the groups. However, the INFα and IGF-2r expression levels in the 10% bFF were higher than in the control (P<0.05). In experiment 2, the specific charge proteins of bFF
(basic and acidic) were also used as media supplements in the maturation medium. The basic fraction had higher oocyte maturation rate and blastocyst cell number when compared with addition of acidic fraction
(P<0.05). The expression levels for almost all developmentally important genes in the basic fraction were greater than those in the acidic fraction, particularly INFα (P<0.05). Most of the
protein in the basic fraction was associated with the immune response and mRNA processing. In conclusion, supplementation of 10% bFF alone in maturation medium can support oocyte maturation and embryo development. The basic
fraction in bFF seemed to have effect on oocyte maturation rate and blastocyst cell number.
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Affiliation(s)
- Saranya Satitmanwiwat
- Reproductive Research Group, Institute of Molecular Biosciences, Mahidol University, Salaya, Nakhon Pathom 73170, Thailand
| | - Chinarat Changsangfah
- Reproductive Research Group, Institute of Molecular Biosciences, Mahidol University, Salaya, Nakhon Pathom 73170, Thailand
| | - Tassanee Faisaikarm
- Reproductive Research Group, Institute of Molecular Biosciences, Mahidol University, Salaya, Nakhon Pathom 73170, Thailand
| | - Kornkanok Promthep
- Reproductive Research Group, Institute of Molecular Biosciences, Mahidol University, Salaya, Nakhon Pathom 73170, Thailand
| | - Sujira Thammawung
- Department of Surgery and Theriogenology, Faculty of Veterinary Medicine, Khon Kaen University 40002, Thailand
| | - Kulnasan Saikhun
- Reproductive Research Group, Institute of Molecular Biosciences, Mahidol University, Salaya, Nakhon Pathom 73170, Thailand
| | - Kampon Kaeoket
- Semen Laboratory, Department of Clinical Sciences and Public Health, Faculty of Veterinary Science, Mahidol University, Nakhon Pathom 73170, Thailand
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20
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Loren P, Cheuquemán C, Sánchez E, Risopatrón J, Arias ME, Felmer R, Sánchez R. Effect of short-term exposure of cumulus-oocyte complex to 3-morpholinosydnonimine on in vitro embryo development and gene expression in cattle. Reprod Domest Anim 2016; 51:1010-1019. [PMID: 27644683 DOI: 10.1111/rda.12788] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Accepted: 08/04/2016] [Indexed: 11/28/2022]
Abstract
Short-term exposure of gametes to different types of stress might induce stress tolerance in mammalian embryos. The aim of this study was to evaluate the effect of short-term exposure of bovine mature cumulus-oocyte complex (COC) to 3-morpholinosydnonimine (SIN-1) on subsequent in vitro embryo development, embryo quality and relative gene expression. Matured COCs were incubated with SIN-1 (0, 0.1, 1, 10 and 100 μM SIN-1) for 1 hr before in vitro fertilization and zygotes were cultured until Day 7. The cleavage rate at 72 hr did not show any differences among groups. However, the blastocyst rate on Day 7 decreased with all treatments evaluated, with the embryos generated with 10 μM SIN-1 showing the lowest embryo production rate. Embryo quality analysis did not show any differences in total cell number (TCN) or inner cell mass (ICM) among groups. Relative gene expression analysis showed a downregulation of eNOS expression and an upregulation of nNOS expression in all treatments evaluated compared to the control group. Also, a downregulation was observed in some treatments: SOD2 at 0.1 μM; SOD1 at 0.1 and 100 μM; PRDX5 at 0.1, 10 and 100 μM; and NANOG at 10 and 100 μM; and an upregulation of CDX2 expression was observed at 100 μM. The other genes (OCT4, HIF1A, HSPA1A, BCL2A and iNOS) did not show any differences in the relative gene expression. These results suggest that the short-term exposure of mature bovine COCs to SIN-1 does not induce stress tolerance and has no beneficial effect on bovine in vitro embryo production.
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Affiliation(s)
- P Loren
- Student of Doctoral Program in Sciences major in Applied Cellular and Molecular Biology, Universidad de la Frontera, Temuco, Chile.,Centre of Biotechnology on Reproduction (CEBIOR-BIOREN), Faculty of Medicine, Universidad de La Frontera, Temuco, Chile
| | - C Cheuquemán
- Centre of Biotechnology on Reproduction (CEBIOR-BIOREN), Faculty of Medicine, Universidad de La Frontera, Temuco, Chile
| | - E Sánchez
- Student of Doctoral Program in Sciences major in Applied Cellular and Molecular Biology, Universidad de la Frontera, Temuco, Chile.,Centre of Biotechnology on Reproduction (CEBIOR-BIOREN), Faculty of Medicine, Universidad de La Frontera, Temuco, Chile
| | - J Risopatrón
- Centre of Biotechnology on Reproduction (CEBIOR-BIOREN), Faculty of Medicine, Universidad de La Frontera, Temuco, Chile.,Department of Basic Science, Faculty of Medicine, Universidad de La Frontera, Temuco, Chile
| | - M E Arias
- Centre of Biotechnology on Reproduction (CEBIOR-BIOREN), Faculty of Medicine, Universidad de La Frontera, Temuco, Chile.,Department of Agricultural and Livestock Production, Faculty of Farming, Livestock and Forestry Sciences, Universidad de La Frontera, Temuco, Chile
| | - R Felmer
- Centre of Biotechnology on Reproduction (CEBIOR-BIOREN), Faculty of Medicine, Universidad de La Frontera, Temuco, Chile.,Department of Agricultural and Livestock Production, Faculty of Farming, Livestock and Forestry Sciences, Universidad de La Frontera, Temuco, Chile
| | - R Sánchez
- Centre of Biotechnology on Reproduction (CEBIOR-BIOREN), Faculty of Medicine, Universidad de La Frontera, Temuco, Chile.,Department of Preclinical Sciences, Faculty of Medicine, Universidad de La Frontera, Temuco, Chile
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Lee JH, Chun JL, Kim KJ, Kim EY, Kim DH, Lee BM, Han KW, Park KS, Lee KB, Kim MK. Effect of Acteoside as a Cell Protector to Produce a Cloned Dog. PLoS One 2016; 11:e0159330. [PMID: 27428333 PMCID: PMC4948914 DOI: 10.1371/journal.pone.0159330] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Accepted: 06/30/2016] [Indexed: 11/18/2022] Open
Abstract
Somatic cell nuclear transfer (SCNT) is a well-known laboratory technique. The principle of the SCNT involves the reprogramming a somatic nucleus by injecting a somatic cell into a recipient oocyte whose nucleus has been removed. Therefore, the nucleus donor cells are considered as a crucial factor in SCNT. Cell cycle synchronization of nucleus donor cells at G0/G1 stage can be induced by contact inhibition or serum starvation. In this study, acteoside, a phenylpropanoid glycoside compound, was investigated to determine whether it is applicable for inducing cell cycle synchronization, cytoprotection, and improving SCNT efficiency in canine fetal fibroblasts. Primary canine fetal fibroblasts were treated with acteoside (10, 30, 50 μM) for various time periods (24, 48 and 72 hours). Cell cycle synchronization at G0/G1 stage did not differ significantly with the method of induction: acteoside treatment, contact inhibition or serum starvation. However, of these three treatments, serum starvation resulted in significantly increased level of reactive oxygen species (ROS) (99.5 ± 0.3%) and apoptosis. The results also revealed that acteoside reduced ROS and apoptosis processes including necrosis in canine fetal fibroblasts, and improved the cell survival. Canine fetal fibroblasts treated with acteoside were successfully arrested at the G0/G1 stage. Moreover, the reconstructed embryos using nucleus donor cells treated with acteoside produced a healthy cloned dog, but not the embryos produced using nucleus donor cells subjected to contact inhibition. In conclusion, acteoside induced cell cycle synchronization of nucleus donor cells would be an alternative method to improve the efficiency of canine SCNT because of its cytoprotective effects.
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Affiliation(s)
- Ji Hye Lee
- Division of Animal & Dairy Science, College of Agriculture and Life Science, Chungnam National University, Daejeon, Republic of Korea
| | - Ju Lan Chun
- Division of Animal & Dairy Science, College of Agriculture and Life Science, Chungnam National University, Daejeon, Republic of Korea
| | - Keun Jung Kim
- Division of Animal & Dairy Science, College of Agriculture and Life Science, Chungnam National University, Daejeon, Republic of Korea
| | - Eun Young Kim
- Division of Animal & Dairy Science, College of Agriculture and Life Science, Chungnam National University, Daejeon, Republic of Korea
| | - Dong-hee Kim
- Division of Animal & Dairy Science, College of Agriculture and Life Science, Chungnam National University, Daejeon, Republic of Korea
| | - Bo Myeong Lee
- Division of Animal & Dairy Science, College of Agriculture and Life Science, Chungnam National University, Daejeon, Republic of Korea
| | - Kil Woo Han
- Division of Animal & Dairy Science, College of Agriculture and Life Science, Chungnam National University, Daejeon, Republic of Korea
| | - Kang-Sun Park
- Division of Animal & Dairy Science, College of Agriculture and Life Science, Chungnam National University, Daejeon, Republic of Korea
| | - Kyung-Bon Lee
- Department of Biology Education, College of Education, Chonnam National University, Gwangju, Republic of Korea
| | - Min Kyu Kim
- Division of Animal & Dairy Science, College of Agriculture and Life Science, Chungnam National University, Daejeon, Republic of Korea
- * E-mail:
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Liu C, Wu GQ, Fu XW, Mo XH, Zhao LH, Hu HM, Zhu SE, Hou YP. The Extracellular Calcium-Sensing Receptor (CASR) Regulates Gonadotropins-Induced Meiotic Maturation of Porcine Oocytes. Biol Reprod 2015; 93:131. [PMID: 26490840 DOI: 10.1095/biolreprod.115.128579] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Accepted: 10/14/2015] [Indexed: 12/16/2022] Open
Abstract
Gonadotropins and epidermal growth factor (EGF) play crucial roles in promoting oocyte maturation. The regulatory network downstream of these key factors is not well understood. The present study was designed to investigate the role of the calcium-sensing receptor (CASR) in porcine oocyte in vitro maturation. CASR expression was up-regulated in oocytes matured in gonadotropin-containing medium. Cortical distribution of CASR was enhanced with gonadotropins but not EGF. Supplementation of a CASR agonist (NPS R-568) in the gonadotropin (FSH and/or LH)-containing maturation medium significantly enhanced oocyte nuclear maturation. Addition of NPS2390, a CASR antagonist, compromised oocyte nuclear maturation. Furthermore, increased cortical distribution and decreased expression of CASR was observed after the NPS R-568 treatment. Oocytes treated with NPS R-568 had higher concentration of CYCLIN B1, decreased reactive oxygen species, and increased glutathione levels, indicative of advanced cytoplasmic maturation. In contrast, NPS2390 treatment compromised oocyte cytoplasmic maturation. A higher blastocyst formation rate after parthenogenetic activation was observed when oocytes were matured in the presence of the CASR agonist, NPS R-568. MAPK3/1 phosphorylation was increased during in vitro maturation and after NPS R-568 treatment, and decreased following CASR antagonist supplementation. Taken together, our data showed that the CASR is a gonadotropin-regulated factor that promotes porcine oocyte maturation in a MAPK-dependent manner.
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Affiliation(s)
- Cong Liu
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Guo-Quan Wu
- Yunnan Animal Science and Veterinary Institute, Kunming, Yunnan, China
| | - Xiang-Wei Fu
- Key Laboratory of Animal Genetics, Breeding and Reproduction, Ministry of Agriculture and National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Xian-Hong Mo
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Li-Hong Zhao
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Hong-Mei Hu
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Shi-En Zhu
- Key Laboratory of Animal Genetics, Breeding and Reproduction, Ministry of Agriculture and National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Yun-Peng Hou
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
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23
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Kalo D, Roth Z. Effects of mono(2-ethylhexyl)phthalate on cytoplasmic maturation of oocytes--The bovine model. Reprod Toxicol 2015; 53:141-51. [PMID: 25900598 DOI: 10.1016/j.reprotox.2015.04.007] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Revised: 03/09/2015] [Accepted: 04/03/2015] [Indexed: 02/08/2023]
Abstract
Phthalates are known reproductive toxicants, but their intracellular disruptive effects on oocyte maturation competence are less known. We studied the potential risk associated with acute exposure of oocytes to mono(2-ethylhexyl)phthalate (MEHP). First, bovine oocytes were matured in vitro with or without 50 μM MEHP and examined for mitochondrial features associated with DNA fragmentation. MEHP increased reactive oxygen species levels and reduced the proportion of highly polarized mitochondria along with alterations in genes associated with mitochondrial oxidative phosphorylation (CYC1, MT-CO1 and ATP5B). In a second set of experiments, we associated the effects of MEHP on meiotic progression with those on cytoplasmic maturation. MEHP impaired reorganization of cytoplasmic organelles in matured oocytes reflected by reductions in category I mitochondria, type III cortical granules and class I endoplasmic reticulum. These alterations are associated with the previously reported reduced developmental competence of MEHP-treated bovine oocytes, and reveal the risk associated with acute exposure.
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Affiliation(s)
- D Kalo
- Department of Animal Sciences, Robert H. Smith Faculty of Agriculture, Food and Environment, and Center of Excellence in Agriculture and Environmental Health, the Hebrew University, Rehovot 76100, Israel
| | - Z Roth
- Department of Animal Sciences, Robert H. Smith Faculty of Agriculture, Food and Environment, and Center of Excellence in Agriculture and Environmental Health, the Hebrew University, Rehovot 76100, Israel.
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