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Andrade KO, Monte APO, Silva RLS, Barberino RS, Mota IM, Santos GCS, Guimarães VS, Silva GAL, Teixeira CS, Matos MHT. Effect of lactose on the in vitro development of sheep secondary follicles. Anim Reprod Sci 2024; 270:107578. [PMID: 39213730 DOI: 10.1016/j.anireprosci.2024.107578] [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: 01/19/2024] [Revised: 07/28/2024] [Accepted: 08/11/2024] [Indexed: 09/04/2024]
Abstract
Considering that follicular development is an energy-dependent process, supplementation of the culture medium with energy substrates, such as lactose, would improve follicle viability and growth. Thus, the aim of this study was to evaluate the effect of lactose on morphology, development, glutathione (GSH) concentration, mitochondrial activity, DNA fragmentation, and meiotic resumption of oocytes from sheep secondary follicles cultured in vitro. Secondary follicles were isolated from the cortex of ovine ovaries and cultured individually for 18 days in α-MEM supplemented with bovine serum albumin (BSA), insulin, glutamine, hypoxanthine, transferrin, selenium and ascorbic acid (control medium: α-MEM+) or in α-MEM+ plus different concentrations of lactose (0.025, 0.05 and 0.1 M). After culture, some of the oocytes were subjected to TUNEL assay and in vitro maturation (IVM). Follicular morphology, glutathione (GSH) concentration and mitochondrial activity were evaluated at the end of the culture. At the day 18, the percentage of morphologically normal follicles was greater (P<0.05) in the treatment of 0.025 M lactose (92.5 %) compared to the control group (75.55 %). In addition, GSH concentrations increased (P<0.05) in treatment containing 0.025 M lactose compared to the other treatments. Furthermore, oocytes cultured in 0.025 M lactose had greater (P<0.05) mitochondrial activity levels than in α-MEM+ and 0.1 M lactose. The group α-MEM+ presented a increase of TUNEL-positive oocytes (35.09 %) compared to 0.025 lactose (9.09 %). The percentage of meiotic resumption was greater (P<0.05) in oocytes from secondary follicles cultured in 0.025 M lactose (54.5 %) than in α-MEM+ (45.5 %). In conclusion, 0.025 M lactose improved survival, GSH and active mitochondria levels and meiotic resumption of oocytes from in vitro cultured secondary follicles. Supplementation of the culture medium of preantral follicles with lactose can gradually provide energy to follicular cells, potentially enhancing the production of viable oocytes for biotechniques such as IVM and in vitro fertilization.
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Affiliation(s)
- Kíscyla O Andrade
- Federal University of Vale do São Francisco, Nucleus of Biotechnology Applied to Ovarian Follicle Development, Federal University of Vale do São Francisco, Petrolina, PE 56300-990, Brazil
| | - Alane P O Monte
- Federal University of Vale do São Francisco, Nucleus of Biotechnology Applied to Ovarian Follicle Development, Federal University of Vale do São Francisco, Petrolina, PE 56300-990, Brazil
| | - Regina L S Silva
- Federal University of Vale do São Francisco, Nucleus of Biotechnology Applied to Ovarian Follicle Development, Federal University of Vale do São Francisco, Petrolina, PE 56300-990, Brazil
| | - Ricássio S Barberino
- Federal University of Vale do São Francisco, Nucleus of Biotechnology Applied to Ovarian Follicle Development, Federal University of Vale do São Francisco, Petrolina, PE 56300-990, Brazil
| | - Istefani M Mota
- Federal University of Vale do São Francisco, Nucleus of Biotechnology Applied to Ovarian Follicle Development, Federal University of Vale do São Francisco, Petrolina, PE 56300-990, Brazil
| | - Gabriela C S Santos
- Federal University of Vale do São Francisco, Nucleus of Biotechnology Applied to Ovarian Follicle Development, Federal University of Vale do São Francisco, Petrolina, PE 56300-990, Brazil
| | - Valéria S Guimarães
- Federal University of Vale do São Francisco, Nucleus of Biotechnology Applied to Ovarian Follicle Development, Federal University of Vale do São Francisco, Petrolina, PE 56300-990, Brazil
| | - Gizele A L Silva
- Federal University of Vale do São Francisco, Nucleus of Biotechnology Applied to Ovarian Follicle Development, Federal University of Vale do São Francisco, Petrolina, PE 56300-990, Brazil
| | - Claudener S Teixeira
- Agrarian and Biodiversity Sciences Center, Federal University of Cariri, Crato, CE 63130-025, Brazil
| | - Maria Helena T Matos
- Federal University of Vale do São Francisco, Nucleus of Biotechnology Applied to Ovarian Follicle Development, Federal University of Vale do São Francisco, Petrolina, PE 56300-990, Brazil.
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Jiao A, Sun J, Sun Z, Zhao Y, Han T, Zhang H, Gao Q. Effects of limonin on oxidative stress and early apoptosis in oocytes during in vitro maturation. Theriogenology 2024; 218:8-15. [PMID: 38290232 DOI: 10.1016/j.theriogenology.2024.01.025] [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: 10/28/2023] [Revised: 01/23/2024] [Accepted: 01/24/2024] [Indexed: 02/01/2024]
Abstract
To investigate the effects of limonin (Lim) on oxidative stress and early apoptosis in bovine oocytes during in vitro maturation (IVM), different concentrations of Lim (0, 10, 20, 50 μmol/L) were added to bovine IVM medium. Oocyte maturation rates and development 24 h after in vitro fertilization (IVF) were examined to determine the optimal Lim concentration. The optimal Lim concentration was added to the IVM medium, and 0 μmol/L Lim was used as the control. Immunofluorescence staining was used to detect the abnormal rate of spindle assembly, reactive oxygen species (ROS), glutathione (GSH), mitochondrial membrane potential (MMP) levels, mitochondrial distribution, and the fluorescence intensity of cathepsin B (CB)-active LC3 protein. RT‒qPCR was used to detect the mRNA expression levels of antioxidant-, apoptosis- and autophagy-related genes in oocytes. The total number of blastocysts and the proportion of apoptotic cells among blastocysts were detected. The results showed that the PBI ejection rate, cleavage rate and blastocyst rate of bovine oocytes in the 20 μmol/L Lim group were significantly higher than those in the control group (P < 0.05). Compared with those in the control group, ROS levels, abnormal mitochondrial distribution, the proportion of abnormal spindle assembly, CB activity and LC3 protein fluorescence intensity of oocytes in the 20 μmol/L Lim group were significantly decreased (P < 0.05), and GSH and MMP levels were significantly increased (P < 0.05). The expression of antioxidant genes (Prdx3, Prdx6, Sirt1) and antiapoptotic genes (Bcl-xl, Survivin) were significantly upregulated (P < 0.05), and the expression levels of proapoptotic genes (Caspase-4, BAX) and autophagy-related genes (LC3) were significantly downregulated (P < 0.05). The total number of cells among in vitro fertilized embryos was significantly increased (P < 0.05), and the apoptosis rate of blastocysts was significantly decreased (P < 0.05). Here, we show that Lim exerts positive effects on bovine oocyte IVM by regulating REDOX homeostasis, reducing spindle damage and enhancing mitochondrial function during IVM, thereby inhibiting oocyte apoptosis and autophagy.
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Affiliation(s)
- Anhui Jiao
- Engineering Research Center of North-East Cold Region Beef Cattle Science & Technology Innovation, Ministry of Education, Yanbian University, Yanji, 133002, China; College of Agriculture, Yanbian University, Yanji, 133002, China; Jilin Engineering Research Center of Yanbian Yellow Cattle Resources Reservation, Yanji, 133002, China
| | - Jingyu Sun
- Tianjin Limu Biotechnology Co., LTD., Tianjin, 300456, China
| | - Zhaoyang Sun
- Engineering Research Center of North-East Cold Region Beef Cattle Science & Technology Innovation, Ministry of Education, Yanbian University, Yanji, 133002, China; College of Agriculture, Yanbian University, Yanji, 133002, China; Jilin Engineering Research Center of Yanbian Yellow Cattle Resources Reservation, Yanji, 133002, China
| | - Yuhan Zhao
- Engineering Research Center of North-East Cold Region Beef Cattle Science & Technology Innovation, Ministry of Education, Yanbian University, Yanji, 133002, China; College of Agriculture, Yanbian University, Yanji, 133002, China; Jilin Engineering Research Center of Yanbian Yellow Cattle Resources Reservation, Yanji, 133002, China
| | - Tiancang Han
- Engineering Research Center of North-East Cold Region Beef Cattle Science & Technology Innovation, Ministry of Education, Yanbian University, Yanji, 133002, China; College of Agriculture, Yanbian University, Yanji, 133002, China; Jilin Engineering Research Center of Yanbian Yellow Cattle Resources Reservation, Yanji, 133002, China
| | - Hongbo Zhang
- Engineering Research Center of North-East Cold Region Beef Cattle Science & Technology Innovation, Ministry of Education, Yanbian University, Yanji, 133002, China; College of Agriculture, Yanbian University, Yanji, 133002, China; Jilin Engineering Research Center of Yanbian Yellow Cattle Resources Reservation, Yanji, 133002, China
| | - Qingshan Gao
- Engineering Research Center of North-East Cold Region Beef Cattle Science & Technology Innovation, Ministry of Education, Yanbian University, Yanji, 133002, China; College of Agriculture, Yanbian University, Yanji, 133002, China; Jilin Engineering Research Center of Yanbian Yellow Cattle Resources Reservation, Yanji, 133002, China.
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Zhang CH, Liu XY, Wang J. Essential Role of Granulosa Cell Glucose and Lipid Metabolism on Oocytes and the Potential Metabolic Imbalance in Polycystic Ovary Syndrome. Int J Mol Sci 2023; 24:16247. [PMID: 38003436 PMCID: PMC10671516 DOI: 10.3390/ijms242216247] [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: 10/09/2023] [Revised: 11/06/2023] [Accepted: 11/11/2023] [Indexed: 11/26/2023] Open
Abstract
Granulosa cells are crucial for the establishment and maintenance of bidirectional communication among oocytes. Various intercellular material exchange modes, including paracrine and gap junction, are used between them to achieve the efficient delivery of granulosa cell structural components, energy substrates, and signaling molecules to oocytes. Glucose metabolism and lipid metabolism are two basic energy metabolism pathways in granulosa cells; these are involved in the normal development of oocytes. Pyruvate, produced by granulosa cell glycolysis, is an important energy substrate for oocyte development. Granulosa cells regulate changes in intrafollicular hormone levels through the processing of steroid hormones to control the development process of oocytes. This article reviews the material exchange between oocytes and granulosa cells and expounds the significance of granulosa cells in the development of oocytes through both glucose metabolism and lipid metabolism. In addition, we discuss the effects of glucose and lipid metabolism on oocytes under pathological conditions and explore its relationship to polycystic ovary syndrome (PCOS). A series of changes were found in the endogenous molecules and ncRNAs that are related to glucose and lipid metabolism in granulosa cells under PCOS conditions. These findings provide a new therapeutic target for patients with PCOS; additionally, there is potential for improving the fertility of patients with PCOS and the clinical outcomes of assisted reproduction.
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Affiliation(s)
- Chen-Hua Zhang
- Queen Mary School, Medical College, Nanchang University, Nanchang 330006, China; (C.-H.Z.); (X.-Y.L.)
| | - Xiang-Yi Liu
- Queen Mary School, Medical College, Nanchang University, Nanchang 330006, China; (C.-H.Z.); (X.-Y.L.)
| | - Jing Wang
- Department of Cell Biology, School of Medicine, Nanchang University, Nanchang 330006, China
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Martínez-Moro Á, González-Brusi L, Querejeta-Fernández A, Padilla-Ruiz E, García-Blanco J, Bermejo-Álvarez P. Metabolomics analysis of human cumulus cells obtained from cumulus-oocyte complexes with different developmental potential. Hum Reprod 2023; 38:2187-2195. [PMID: 37697661 PMCID: PMC10628504 DOI: 10.1093/humrep/dead181] [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: 05/27/2023] [Revised: 08/11/2023] [Indexed: 09/13/2023] Open
Abstract
STUDY QUESTION Is the abundance of certain biochemical compounds in human cumulus cells (CCs) related to oocyte quality? SUMMARY ANSWER Malonate, 5-oxyproline, and erythronate were positively associated with pregnancy potential. WHAT IS KNOWN ALREADY CCs are removed and discarded prior to ICSI, thereby constituting an interesting biological material on which to perform molecular analysis aimed to predict oocyte developmental competence. Mitochondrial DNA content and transcriptional analyses in CC have been shown to provide a poor predictive value of oocyte competence, but the untargeted analysis of biochemical compounds (metabolomics) has been unexplored. STUDY DESIGN, SIZE, DURATION CCs were obtained from three groups of cumulus-oocyte complexes (COCs) of known developmental potential: oocytes not developing to blastocyst following ICSI (Bl-); oocytes developing to blastocyst but failing to establish pregnancy following embryo transfer (P-); and oocytes developing to blastocyst able to establish a pregnancy (P+). Metabolomics analyses were performed on 12 samples per group, each sample comprising the CC recovered from a single COC. PARTICIPANTS/MATERIALS, SETTING, METHODS Human CC samples were obtained from IVF treatments. Only unfrozen oocytes and embryos not submitted to preimplantation genetic testing were included in the analysis. Metabolomics analysis was performed by ultra-high performance liquid chromatography-tandem mass spectroscopy. MAIN RESULTS AND THE ROLE OF CHANCE The analysis identified 98 compounds, five of which were differentially abundant (P < 0.05) between groups: asparagine, proline, and malonate were less abundant in P- compared to Bl-, malonate and 5-oxoproline were less abundant in P- group compared to P+, and erythronate was less abundant in Bl- group compared to P+. No significant association between the abundance of the compounds identified and donor age or BMI was noted. LIMITATIONS, REASONS FOR CAUTION Data dispersion and the lack of coherence between developmental groups preclude the direct use of metabolic markers in clinical practice, where the uterine environment plays a major role in pregnancy outcome. The abundance of other compounds not detected by the analysis may be associated with oocyte competence. As donors were lean (only two with BMI > 30 kg/m2) and young (<34 years old), a possible effect of obesity or advanced age on the CC metabolome could not be determined. WIDER IMPLICATIONS OF THE FINDINGS The abundance of malonate, 5-oxyproline, and erythronate in CC was significantly higher in COCs ultimately establishing pregnancy, providing clues on the pathways required for oocyte competence. The untargeted analysis uncovered the presence of compounds that were not expected in CC, such as β-citrylglutamate and the neurotransmitter N-acetyl-aspartyl-glutamate, which may play roles in chromatin remodeling and signaling, respectively. STUDY FUNDING/COMPETING INTEREST(S) Research was supported by the Industrial Doctorate Project IND2017/BIO-7748 funded by Madrid Region Government. The authors declare no competing interest. TRIAL REGISTRATION NUMBER N/A.
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Affiliation(s)
- Álvaro Martínez-Moro
- Animal Reproduction Department, INIA, CSIC, Madrid, Spain
- IVF Spain, Madrid, Spain
| | | | - Ana Querejeta-Fernández
- Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense, Madrid, Spain
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Zhu Q, Li Y, Ma J, Ma H, Liang X. Potential factors result in diminished ovarian reserve: a comprehensive review. J Ovarian Res 2023; 16:208. [PMID: 37880734 PMCID: PMC10598941 DOI: 10.1186/s13048-023-01296-x] [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: 06/11/2023] [Accepted: 10/07/2023] [Indexed: 10/27/2023] Open
Abstract
The ovarian reserve is defined as the quantity of oocytes stored in the ovary or the number of oocytes that can be recruited. Ovarian reserve can be affected by many factors, including hormones, metabolites, initial ovarian reserve, environmental problems, diseases, and medications, among others. With the trend of postponing of pregnancy in modern society, diminished ovarian reserve (DOR) has become one of the most common challenges in current clinical reproductive medicine. Attributed to its unclear mechanism and complex clinical features, it is difficult for physicians to administer targeted treatment. This review focuses on the factors associated with ovarian reserve and discusses the potential influences and pathogenic factors that may explain the possible mechanisms of DOR, which can be improved or built upon by subsequent researchers to verify, replicate, and establish further study findings, as well as for scientists to find new treatments.
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Affiliation(s)
- Qinying Zhu
- The First Clinical Medical College of Lanzhou University, Lanzhou, China
| | - Yi Li
- The First Clinical Medical College of Lanzhou University, Lanzhou, China
| | - Jianhong Ma
- The First Clinical Medical College of Lanzhou University, Lanzhou, China
| | - Hao Ma
- The First Clinical Medical College of Lanzhou University, Lanzhou, China
| | - Xiaolei Liang
- Department of Obstetrics and Gynecology, Key Laboratory for Gynecologic Oncology Gansu Province, The First Hospital of Lanzhou University, No.1, Donggangxi Rd, Chengguan District, 730000, Lanzhou, China.
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Bittner-Schwerda L, Herrera C, Wyck S, Malama E, Wrenzycki C, Bollwein H. Brilliant Cresyl Blue Negative Oocytes Show a Reduced Competence for Embryo Development after In Vitro Fertilisation with Sperm Exposed to Oxidative Stress. Animals (Basel) 2023; 13:2621. [PMID: 37627412 PMCID: PMC10451622 DOI: 10.3390/ani13162621] [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: 07/03/2023] [Revised: 08/06/2023] [Accepted: 08/07/2023] [Indexed: 08/27/2023] Open
Abstract
The extent of oxidative damage transferred by the damaged sperm to the progeny is likely to be limited by the oocyte's repair and antioxidative capacity. We aimed to assess the association between Brilliant Cresyl Blue (BCB) staining in oocytes and their competence for embryo development after in vitro fertilisation (IVF) with damaged sperm. For this purpose, bovine sperm were incubated without (non-oxidised sperm, NOX S) or with 100 µM H2O2 (oxidised sperm, OX S) and were used to fertilise in-vitro-matured bovine oocytes (BCB-pos./BCB-neg.). Unstained oocytes served as controls (US). Development was assessed at 30, 46, 60 h and on Days (D) 7 and 8 after IVF. Total cell number and apoptotic index were analysed in D7 blastocysts. BCB-neg. oocytes showed lower cleavage rates and blastocyst rates than unstained oocytes after IVF with NOX S (p < 0.05). They showed the highest reduction in D7 blastocyst rate upon fertilisation with OX S and showed a delayed embryo development at 46 and 60 h after IVF compared to embryos produced with NOX S (p < 0.05). Total cell number in blastocysts produced with BCB-neg. oocytes was lower (p < 0.05) in the embryos produced with OX S than in embryos after IVF with NOX S. In conclusion, BCB-neg. oocytes have a lower competence to support embryo development after in vitro fertilisation with oxidised sperm.
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Affiliation(s)
- Lilli Bittner-Schwerda
- Clinic of Reproductive Medicine, Vetsuisse Faculty, University of Zurich, 8057 Zuerich, Switzerland
| | - Carolina Herrera
- Clinic of Reproductive Medicine, Vetsuisse Faculty, University of Zurich, 8057 Zuerich, Switzerland
| | - Sarah Wyck
- Clinic of Reproductive Medicine, Vetsuisse Faculty, University of Zurich, 8057 Zuerich, Switzerland
| | - Eleni Malama
- Clinic of Reproductive Medicine, Vetsuisse Faculty, University of Zurich, 8057 Zuerich, Switzerland
| | - Christine Wrenzycki
- Veterinary Clinic for Reproductive Medicine and Neonatology, Chair for Molecular Reproductive Medicine, Justus-Liebig-University Giessen, 35392 Giessen, Germany
| | - Heinrich Bollwein
- Clinic of Reproductive Medicine, Vetsuisse Faculty, University of Zurich, 8057 Zuerich, Switzerland
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Martinez CA, Rizos D, Rodriguez-Martinez H, Funahashi H. Oocyte-cumulus cells crosstalk: New comparative insights. Theriogenology 2023; 205:87-93. [PMID: 37105091 DOI: 10.1016/j.theriogenology.2023.04.009] [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: 01/11/2023] [Revised: 04/08/2023] [Accepted: 04/10/2023] [Indexed: 04/29/2023]
Abstract
Mammalian follicles are constituted of a complex structure composed of several layers of granulosa cells surrounding the oocyte and of theca cells that reside beneath its basement membrane. During folliculogenesis, granulosa cells separate into two anatomically and functionally distinct sub-types; the mural cells lining the follicle wall and the oocyte-surrounding cumulus cells, i.e. those in intimate metabolic contact with the oocyte. The cumulus cells connecting with the oocyte have trans-zonal cytoplasmic projections which, penetrating the zona pellucida, form the cumulus-oocyte complex. The connections through gap junctions allow the transfer of small molecules between oocyte and cumulus cells, such as ions, metabolites, and amino acids necessary for oocyte growth, as well as small regulatory molecules that control oocyte development. The bi-directional communication between the oocyte and cumulus cells is crucial for the development and functions of both cell types. Our current knowledge of the relationship between the oocyte and its surrounding cumulus cells continues to change as we gain a greater understanding of factors regulating oocyte development and folliculogenesis. This review will mainly focus on the reciprocal interaction between oocytes and cumulus cells during the latter stages of follicle development i.e. through antral development to periovulatory events including oocyte maturation, expansion, and degradation of the cumulus matrix.
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Affiliation(s)
- Cristina A Martinez
- Department of Animal Science, Okayama University, Okayama, Japan; Department of Animal Reproduction, INIA-CSIC, Madrid, Spain; Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden.
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Luchetti CG, Lorenzo MS, Elia EM, Teplitz GM, Cruzans PR, Carou MC, Lombardo DM. Effects of the addition of insulin-transferrin-selenium (ITS) and/or metformin to the in vitro maturation of porcine oocytes on cytoplasmic maturation and embryo development. Reprod Fertil Dev 2023; 35:363-374. [PMID: 36780707 DOI: 10.1071/rd22254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Accepted: 01/21/2023] [Indexed: 02/15/2023] Open
Abstract
CONTEXT One of the main problems of porcine in vitro maturation (IVM) is incomplete cytoplasmatic maturation. Nuclear and cytoplasmic maturation will determine the future success of fertilisation and embryo development. Insulin-transferrin-selenium (ITS) has insulin-like and antioxidant effects, and metformin (M) is an insulin-sensitiser and antioxidant drug. AIMS To assess the effects of adding ITS and/or M in porcine IVM media on cytoplasmic maturation and early embryo development. METHODS Cumulus -oocyte complexes (COC) were IVM with M (10-4 M), ITS (0.1% v/v), M+ITS or no adding (Control). KEY RESULTS ITS increased glucose consumption compared to Control and M (P <0.01), and M+ITS did not differ from ITS or Control. Redox balance: M, ITS and M+ITS increased glutathione (P <0.01) and decreased lipid peroxidation (P <0.005). The viability of cumulus cells by flow cytometry increased with M (P <0.005) and decreased with ITS (P <0.001); M+ITS did not differ from Control. After IVF, M increased penetration and decreased male pronucleus (P <0.05). Embryo development: cleavage increased with M (P <0.05), and blastocysts increased with ITS and M+ITS (P <0.05). The number of blastocyst cells increased with ITS (P <0.05). CONCLUSIONS Adding ITS and M+ITS to porcine IVM media benefits embryo development to blastocysts, but ITS alone has better effects than M+ITS. IMPLICATIONS ITS is an excellent tool to improve IVM and embryo development after IVF in pigs.
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Affiliation(s)
- Carolina Griselda Luchetti
- Universidad de Buenos Aires, Facultad de Ciencias Veterinarias, Instituto de Investigación y Tecnología en Reproducción Animal, Cátedra de Histología y Embriología, Chorroarín 280, Buenos Aires C1427CWO, Argentina; and Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Godoy Cruz 2290, Buenos Aires C1425FQD, Argentina
| | - María Soledad Lorenzo
- Universidad de Buenos Aires, Facultad de Ciencias Veterinarias, Instituto de Investigación y Tecnología en Reproducción Animal, Cátedra de Histología y Embriología, Chorroarín 280, Buenos Aires C1427CWO, Argentina; and Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Godoy Cruz 2290, Buenos Aires C1425FQD, Argentina
| | - Evelin Mariel Elia
- Universidad de Buenos Aires (UBA), Facultad de Ciencias Exactas y Naturales (FCEN), Intendente Güiraldes 2160, Ciudad Universitaria, Buenos Aires C1428EGA, Argentina; and Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)-UBA- Instituto de Fisiología, Biología Molecular y Neurociencias (IFIBYNE), Buenos Aires, Argentina; and UBA, FCEN, Departamento de Biodiversidad y Biología Experimental, Buenos Aires, Argentina
| | - Gabriela Maia Teplitz
- Universidad de Buenos Aires, Facultad de Ciencias Veterinarias, Instituto de Investigación y Tecnología en Reproducción Animal, Cátedra de Histología y Embriología, Chorroarín 280, Buenos Aires C1427CWO, Argentina; and Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Godoy Cruz 2290, Buenos Aires C1425FQD, Argentina
| | - Paula Romina Cruzans
- Universidad de Buenos Aires, Facultad de Ciencias Veterinarias, Instituto de Investigación y Tecnología en Reproducción Animal, Cátedra de Histología y Embriología, Chorroarín 280, Buenos Aires C1427CWO, Argentina; and Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Godoy Cruz 2290, Buenos Aires C1425FQD, Argentina
| | - María Clara Carou
- Universidad de Buenos Aires, Facultad de Ciencias Veterinarias, Instituto de Investigación y Tecnología en Reproducción Animal, Cátedra de Histología y Embriología, Chorroarín 280, Buenos Aires C1427CWO, Argentina
| | - Daniel Marcelo Lombardo
- Universidad de Buenos Aires, Facultad de Ciencias Veterinarias, Instituto de Investigación y Tecnología en Reproducción Animal, Cátedra de Histología y Embriología, Chorroarín 280, Buenos Aires C1427CWO, Argentina; and Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Godoy Cruz 2290, Buenos Aires C1425FQD, Argentina
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Brady K, Liu HC, Hicks J, Long JA, Porter TE. Global gene expression analysis of the turkey hen hypothalamo-pituitary-gonadal axis during the preovulatory hormonal surge. Poult Sci 2023; 102:102547. [PMID: 36878099 PMCID: PMC10006860 DOI: 10.1016/j.psj.2023.102547] [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: 10/03/2022] [Revised: 01/04/2023] [Accepted: 01/25/2023] [Indexed: 02/05/2023] Open
Abstract
The preovulatory hormonal surge (PS) consists of elevated circulating luteinizing hormone (LH) and progesterone levels and serves as the primary trigger for ovarian follicle ovulation. Increased LH and progesterone, produced by the pituitary and the granulosa layer of the largest ovarian follicle (F1), respectively, result from hypothalamic stimulation and steroid hormone feedback on the hypothalamo-pituitary-gonadal (HPG) axis. The hypothalamus, pituitary, F1 granulosa, and granulosa layer of the fifth largest follicle (F5) were isolated from converter turkey hens outside and during the PS and subjected to RNA sequencing (n = 6 per tissue). Differentially expressed genes were subjected to functional annotation using DAVID and IPA. A total of 12, 250, 1235, and 1938 DEGs were identified in the hypothalamus, pituitary, F1 granulosa, and F5 granulosa respectively (q<0.05, |fold change|>1.5, FPKM>1). Gene Ontology (GO) analysis revealed key roles for metabolic processes, steroid hormone feedback, and hypoxia induced gene expression changes. Upstream analysis identified a total of 4, 42, 126, and 393 potential regulators of downstream gene expression in the hypothalamus, pituitary, F1G, and F5G respectively, with a total of 63 potential regulators exhibiting differential expression between samples collected outside and during the PS (|z-score|>2). The results from this study serve to increase the current knowledge base surrounding the regulation of the PS in turkey hens. Through GO analysis, downstream processes and functions associated with the PS were linked to identified DEGs, and through upstream analysis, potential regulators of DEGs were identified for further analysis. Linking upstream regulators to the downstream PS and ovulation events could allow for genetic selection or manipulation of ovulation frequencies in turkey hens.
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Affiliation(s)
- Kristen Brady
- Animal Biosciences and Biotechnology Laboratory, BARC, ARS, USDA, Beltsville, MD 20705, United States.
| | - Hsiao-Ching Liu
- Department of Animal Science, North Carolina State University, Raleigh, NC 27695, United States
| | - Julie Hicks
- Department of Animal Science, North Carolina State University, Raleigh, NC 27695, United States
| | - Julie A Long
- Animal Biosciences and Biotechnology Laboratory, BARC, ARS, USDA, Beltsville, MD 20705, United States
| | - Tom E Porter
- Department of Animal and Avian Sciences, University of Maryland, College Park, MD 20742, United States
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Gao M, Chen M, Chen Q, Zhu S, Wang H, Yang W, Wang X, Wang Q, Gu L. Integration of parallel metabolomics and transcriptomics reveals metabolic patterns in porcine oocytes during maturation. Front Endocrinol (Lausanne) 2023; 14:1131256. [PMID: 36817597 PMCID: PMC9929430 DOI: 10.3389/fendo.2023.1131256] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Accepted: 01/17/2023] [Indexed: 02/04/2023] Open
Abstract
Well-controlled metabolism is the prerequisite for optimal oocyte development. To date, numerous studies have focused mainly on the utilization of exogenous substrates by oocytes, whereas the underlying mechanism of intrinsic regulation during meiotic maturation is less characterized. Herein, we performed an integrated analysis of parallel metabolomics and transcriptomics by isolating porcine oocytes at three time points, cooperatively depicting the global picture of the metabolic patterns during maturation. In particular, we identified the novel metabolic features during porcine oocyte meiosis, such as the fall in bile acids, the active one-carbon metabolism and a progressive decline in nucleotide metabolism. Collectively, the current study not only provides a comprehensive multiple omics data resource, but also may facilitate the discovery of molecular biomarkers that could be used to predict and improve oocyte quality.
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Affiliation(s)
- Ming Gao
- College of Animal Science & Technology, Nanjing Agricultural University, Nanjing, China
| | - Minjian Chen
- Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Qiuzhen Chen
- State Key Laboratory of Reproductive Medicine, Suzhou Municipal Hospital, Nanjing Medical University, Nanjing, China
| | - Shuai Zhu
- State Key Laboratory of Reproductive Medicine, Suzhou Municipal Hospital, Nanjing Medical University, Nanjing, China
| | - Hengjie Wang
- State Key Laboratory of Reproductive Medicine, Suzhou Municipal Hospital, Nanjing Medical University, Nanjing, China
| | - Weizheng Yang
- State Key Laboratory of Reproductive Medicine, Suzhou Municipal Hospital, Nanjing Medical University, Nanjing, China
| | - Xi Wang
- State Key Laboratory of Reproductive Medicine, Suzhou Municipal Hospital, Nanjing Medical University, Nanjing, China
- *Correspondence: Ling Gu, ; Qiang Wang, ; Xi Wang,
| | - Qiang Wang
- State Key Laboratory of Reproductive Medicine, Suzhou Municipal Hospital, Nanjing Medical University, Nanjing, China
- *Correspondence: Ling Gu, ; Qiang Wang, ; Xi Wang,
| | - Ling Gu
- College of Animal Science & Technology, Nanjing Agricultural University, Nanjing, China
- *Correspondence: Ling Gu, ; Qiang Wang, ; Xi Wang,
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11
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Zhuan Q, Li J, Du X, Zhang L, Meng L, Luo Y, Zhou D, Liu H, Wan P, Hou Y, Fu X. Antioxidant procyanidin B2 protects oocytes against cryoinjuries via mitochondria regulated cortical tension. J Anim Sci Biotechnol 2022; 13:95. [PMID: 35971139 PMCID: PMC9380387 DOI: 10.1186/s40104-022-00742-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Accepted: 06/05/2022] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND Irreversible cryodamage caused by oocyte vitrification limited its wild application in female fertility preservation. Antioxidants were always used to antagonist the oxidative stress caused by vitrification. However, the comprehensive mechanism underlying the protective role of antioxidants has not been studied. Procyanidin B2 (PCB2) is a potent natural antioxidant and its functions in response to vitrification are still unknown. In this study, the effects of PCB2 on vitrified-thawed oocytes and subsequent embryo development were explored, and the mechanisms underlying the protective role of PCB2 were systematically elucidated. RESULTS Vitrification induced a marked decline in oocyte quality, while PCB2 could improve oocyte viability and further development after parthenogenetic activation. A subsequent study indicated that PCB2 effectively attenuated vitrification-induced oxidative stress, rescued mitochondrial dysfunction, and improved cell viability. Moreover, PCB2 also acts as a cortical tension regulator apart from strong antioxidant properties. Increased cortical tension caused by PCB2 would maintain normal spindle morphology and promote migration, ensure correct meiosis progression and finally reduce the aneuploidy rate in vitrified oocytes. Further study reveals that ATP biosynthesis plays a crucial role in cortical tension regulation, and PCB2 effectively increased the cortical tension through the electron transfer chain pathway. Additionally, PCB2 would elevate the cortical tension in embryo cells at morula and blastocyst stages and further improve blastocyst quality. What's more, targeted metabolomics shows that PCB2 has a beneficial effect on blastocyst formation by mediating saccharides and amino acids metabolism. CONCLUSIONS Antioxidant PCB2 exhibits multi-protective roles in response to vitrification stimuli through mitochondria-mediated cortical tension regulation.
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Affiliation(s)
- Qingrui Zhuan
- grid.22935.3f0000 0004 0530 8290Key Laboratory of Animal Genetics, Breeding and Reproduction of the Ministry of Agriculture and Rural Affairs, Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, National Engineering Laboratory for Animal Breeding, China Agricultural University, Beijing, China
| | - Jun Li
- grid.452458.aDepartment of Reproductive Medicine, Reproductive Medical Center, The First Hospital of Hebei Medical University, Shijiazhuang, Hebei China
| | - Xingzhu Du
- grid.22935.3f0000 0004 0530 8290Key Laboratory of Animal Genetics, Breeding and Reproduction of the Ministry of Agriculture and Rural Affairs, Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, National Engineering Laboratory for Animal Breeding, China Agricultural University, Beijing, China
| | - Luyao Zhang
- grid.22935.3f0000 0004 0530 8290State Key Laboratories of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Lin Meng
- grid.22935.3f0000 0004 0530 8290State Key Laboratories of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Yuwen Luo
- grid.22935.3f0000 0004 0530 8290Key Laboratory of Animal Genetics, Breeding and Reproduction of the Ministry of Agriculture and Rural Affairs, Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, National Engineering Laboratory for Animal Breeding, China Agricultural University, Beijing, China
| | - Dan Zhou
- grid.22935.3f0000 0004 0530 8290Key Laboratory of Animal Genetics, Breeding and Reproduction of the Ministry of Agriculture and Rural Affairs, Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, National Engineering Laboratory for Animal Breeding, China Agricultural University, Beijing, China
| | - Hongyu Liu
- grid.22935.3f0000 0004 0530 8290Key Laboratory of Animal Genetics, Breeding and Reproduction of the Ministry of Agriculture and Rural Affairs, Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, National Engineering Laboratory for Animal Breeding, China Agricultural University, Beijing, China
| | - Pengcheng Wan
- grid.469620.f0000 0004 4678 3979State Key Laboratory of Sheep Genetic Improvement and Healthy Breeding, Institute of Animal Husbandry and Veterinary Sciences, Xinjiang Academy of Agricultural and Reclamation Sciences, Shihhotze, China
| | - Yunpeng Hou
- grid.22935.3f0000 0004 0530 8290State Key Laboratories of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Xiangwei Fu
- Key Laboratory of Animal Genetics, Breeding and Reproduction of the Ministry of Agriculture and Rural Affairs, Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, National Engineering Laboratory for Animal Breeding, China Agricultural University, Beijing, China. .,State Key Laboratory of Sheep Genetic Improvement and Healthy Breeding, Institute of Animal Husbandry and Veterinary Sciences, Xinjiang Academy of Agricultural and Reclamation Sciences, Shihhotze, China.
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12
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Yang X, Zhao Z, Fan Q, Li H, Zhao L, Liu C, Liang X. Cholesterol metabolism is decreased in patients with diminished ovarian reserve. Reprod Biomed Online 2022; 44:185-192. [PMID: 34801402 DOI: 10.1016/j.rbmo.2021.09.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 08/27/2021] [Accepted: 09/13/2021] [Indexed: 11/26/2022]
Abstract
RESEARCH QUESTION Does cholesterol metabolism differ in patients with diminished ovarian reserve (DOR) compared to patients with normal ovarian reserve (NOR)? DESIGN The current research included 72 women with NOR and 86 women with DOR. Data on the cholesterol metabolism in granulosa cells of these women were analysed. RESULTS On the day of human chorionic gonadotrophin injection, serum oestradiol and progesterone in the DOR group were significantly lower than in the control group (P < 0.001). There were no significant differences in serum concentrations of total cholesterol, triglyceride, high-density lipoprotein and low-density lipoprotein between the NOR and DOR groups. The cholesterol-regulated gene SCAP in granulosa cells from women with DOR was down-regulated (P = 0.024). Cholesterol synthesis and transport genes (e.g. IDI1, FDFT1, CYP51A1, SRB1 and STARD1) were also significantly decreased (P = 0.026, P = 0.044, P = 0.049, P = 0.004 and P < 0.001, respectively). In granulosa cells of patients with DOR, cholesterol-related substances such as coprostanone, 11A-acetoxyprogesterone and 17α-hydroxyprogesterone were significantly reduced (P = 0.0008, P = 0.0269, P = 0.0337, respectively). CYP19A1, a key steroidogenesis gene, was significantly reduced (P = 0.009). 17α-hydroxyprogesterone and oestradiol decreased (P = 0.004 and P = 0.039, respectively). CONCLUSION Decreased cholesterol metabolism affecting steroid hormone synthesis in granulosa cells might be a possible mechanism for DOR.
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Affiliation(s)
- Xiulan Yang
- Liangzhou Hospital of Traditional Chinese and Western Medicine, Liangzhou, China
| | - Zhongying Zhao
- The First Clinical Medical College of Lanzhou University, Lanzhou, China
| | - Qigang Fan
- The First Clinical Medical College of Lanzhou University, Lanzhou, China
| | - Hongli Li
- Department of Obstetrics and Gynecology, The First Hospital of Lanzhou University, Key Laboratory for Gynecologic Oncology, Lanzhou Gansu Province, China
| | - Lihui Zhao
- Reproductive Medicine Hospital of the First Hospital of Lanzhou University, Lanzhou, China
| | - Chang Liu
- Department of Obstetrics and Gynecology, The First Hospital of Lanzhou University, Key Laboratory for Gynecologic Oncology, Lanzhou Gansu Province, China
| | - Xiaolei Liang
- Department of Obstetrics and Gynecology, The First Hospital of Lanzhou University, Key Laboratory for Gynecologic Oncology, Lanzhou Gansu Province, China.
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13
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Effect of enzymatic pro-oxidant and antioxidant systems on bovine oocyte in vitro maturation. ANNALS OF ANIMAL SCIENCE 2021. [DOI: 10.2478/aoas-2021-0078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
The role of reactive oxygen species (ROS) during oocyte in vitro maturation (IVM) is still controversial. Although an increase in ROS production may cause deleterious effects in cells, these reactive species may also act as signaling molecules influencing different cell functions. The aim of this study was to examine the effect of varying endogenous ROS levels during IVM on the process of bovine oocyte maturation. To do so, different enzymatic antioxidant (catalase, or superoxide dismutase + catalase, or diphenyl iodonium) or pro-oxidant systems (xanthine + xanthine oxidase, or xanthine + xanthine oxidase + catalase) were added to the culture medium. ROS levels were determined by 2′,7′-dichlorodihydrofluorescein diacetate stain, nuclear maturation was evaluated by the presence of the metaphase II chromosome configuration at 22h of IVM and cleavage rate was recorded 48hs post- in vitro fertilization. ROS levels were only significantly increased (P<0.05) by the O2
.- generating system (xanthine + xanthine oxidase + catalase), but meiotic maturation rates were significantly lower (P<0.05) in all the evaluated systems compared with the control, except for the diphenyl iodonium group. However, this last group presented a significantly lower (P<0.05) cleavage rate in comparison to the control group. These results indicate that ROS would play an essential role during oocyte maturation, since its increase or decrease beyond a physiological level significantly reduced nuclear or cytoplasmic maturation rates in bovine oocytes.
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14
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Li X, Wang H, Wang Y, Zhang L, Wang Y. Comparison of Metabolic Profiling of Arabidopsis Inflorescences Between Landsberg erecta and Columbia, and Meiosis-Defective Mutants by 1H-NMR Spectroscopy. PHENOMICS (CHAM, SWITZERLAND) 2021; 1:73-89. [PMID: 36939799 PMCID: PMC9590573 DOI: 10.1007/s43657-021-00012-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 01/17/2021] [Accepted: 02/10/2021] [Indexed: 06/18/2023]
Abstract
UNLABELLED With the rapid development of omics technologies during the last several decades, genomics, transcriptomics, and proteomics have been extensively used to characterize gene or protein functions in many organisms at the cell or tissue level. However, metabolomics has not been conducted in reproductive organs, with a focus on meiosis in plants. In this study, we adopted a nuclear magnetic resonance (NMR)-based metabolomics approach to reveal the metabolic profile of inflorescences from two Arabidopsis accessions, Columbia (Col) and Landsberg erecta (Ler), and several sterile mutants caused by meiosis defects. We identified 68 dominant metabolites in the samples. Col and Ler displayed distinct metabolite profiles. Interestingly, mutants with similar meiotic defects, such as Atrad51-3, Atrfc1-2, and Atpol2a-2, exhibited similar alterations in metabolites, including upregulation of energy metabolites and promotion of compounds related to maintenance of genomic stability, cytoplasmic homeostasis, and membrane integrity. The collective data reveal distinct changes in metabolites in Arabidopsis inflorescences between the Col and Ler wild type accessions. NMR-based metabolomics could be an effective tool for molecular phenotyping in studies of aspects of plant reproductive development such as meiosis. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s43657-021-00012-3.
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Affiliation(s)
- Xiang Li
- State Key Laboratory of Genetic Engineering and Ministry of Education Key Laboratory of Biodiversity Sciences and Ecological Engineering, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai, China
| | - Hongkuan Wang
- State Key Laboratory of Genetic Engineering and Ministry of Education Key Laboratory of Biodiversity Sciences and Ecological Engineering, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai, China
| | - Ying Wang
- State Key Laboratory of Genetic Engineering and Ministry of Education Key Laboratory of Biodiversity Sciences and Ecological Engineering, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai, China
| | - Limin Zhang
- Chinese Academy of Sciences (CAS) Key Laboratory of Magnetic Resonance in Biological Systems, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, CAS, Wuhan, China
| | - Yingxiang Wang
- State Key Laboratory of Genetic Engineering and Ministry of Education Key Laboratory of Biodiversity Sciences and Ecological Engineering, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai, China
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15
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Akin N, von Mengden L, Herta AC, Billooye K, van Leersum J, Cava-Cami B, Saucedo-Cuevas L, Klamt F, Smitz J, Anckaert E. Glucose metabolism characterization during mouse in vitro maturation identifies alterations in cumulus cells†. Biol Reprod 2021; 104:902-913. [PMID: 33480981 DOI: 10.1093/biolre/ioab008] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 11/24/2020] [Accepted: 01/15/2021] [Indexed: 01/01/2023] Open
Abstract
In vitro maturation (IVM) is an assisted reproduction technique with reduced hormone-related side-effects. Several attempts to implement IVM in routine practice have failed, primarily due to its relatively low efficiency compared with conventional in vitro fertilization (IVF). Recently, capacitation (CAPA)-IVM-a novel two-step IVM method-has improved the embryology outcomes through synchronizing the oocyte nuclear and cytoplasmic maturation. However, the efficiency gap between CAPA-IVM and conventional IVF is still noticeable especially in the numerical production of good quality embryos. Considering the importance of glucose for oocyte competence, its metabolization is studied within both in vivo and CAPA-IVM matured mouse cumulus-oocyte-complexes (COCs) through direct measurements in both cellular compartments, from transcriptional and translational perspectives, to reveal metabolic shortcomings within the CAPA-IVM COCs. These results confirmed that within in vivo COC, cumulus cells (CCs) are highly glycolytic, whereas oocytes, with low glycolytic activity, are deviating their glucose towards pentose phosphate pathway. No significant differences were observed in the CAPA-IVM oocytes compared with their in vivo counterparts. However, their CCs exhibited a precocious increase of glycolytic activity during the pre-maturation culture step and activity was decreased during the IVM step. Here, specific alterations in mouse COC glucose metabolism due to CAPA-IVM culture were characterized using direct measurements for the first time. Present data show that, while CAPA-IVM CCs are able to utilize glucose, their ability to support oocytes during final maturation is impaired. Future CAPA-IVM optimization strategies could focus on adjusting culture media energy substrate concentrations and/or implementing co-culture strategies.
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Affiliation(s)
- Nazli Akin
- Follicle Biology Laboratory (FOBI), Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - Lucia von Mengden
- Laboratory of Cellular Biochemistry, Department of Biochemistry, ICBS, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre (RS), Brazil
| | - Anamaria-Cristina Herta
- Follicle Biology Laboratory (FOBI), Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - Katy Billooye
- Follicle Biology Laboratory (FOBI), Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - Julia van Leersum
- Follicle Biology Laboratory (FOBI), Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - Berta Cava-Cami
- Follicle Biology Laboratory (FOBI), Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - Laura Saucedo-Cuevas
- Follicle Biology Laboratory (FOBI), Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - Fabio Klamt
- Laboratory of Cellular Biochemistry, Department of Biochemistry, ICBS, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre (RS), Brazil
| | - Johan Smitz
- Follicle Biology Laboratory (FOBI), Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - Ellen Anckaert
- Follicle Biology Laboratory (FOBI), Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel (VUB), Brussels, Belgium
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16
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Chen YC, Li JY, Li CJ, Tsui KH, Wang PH, Wen ZH, Lin LT. Luteal Phase Ovarian Stimulation versus Follicular Phase Ovarian Stimulation results in different Human Cumulus cell genes expression: A pilot study. Int J Med Sci 2021; 18:1600-1608. [PMID: 33746576 PMCID: PMC7976567 DOI: 10.7150/ijms.55955] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Accepted: 01/21/2021] [Indexed: 12/22/2022] Open
Abstract
Background: Luteal-phase ovarian stimulation (LPOS) is an alternative in vitro fertilization (IVF) protocol. However, limited data showed the genes expression of cumulus cells (CCs) in LPOS. Therefore, this study aimed to investigate CC genes expression between LPOS and follicular-phase ovarian stimulation (FPOS) in poor ovarian responders (PORs) undergoing IVF cycles. Methods: This was a prospective non-randomized trial (ClinicalTrials.gov Identifier: NCT03238833). A total of 36 PORs who met the Bologna criteria and underwent IVF cycles were enrolled. Fifteen PORs were allocated to the LPOS group, and 21 PORs were allocated to the FPOS group. The levels of CC genes involved in inflammation (CXCL1, CXCL3, TNF, PTGES), oxidative phosphorylation (NDUFB7, NDUFA4L2, SLC25A27), apoptosis (DAPK3, BCL6B) and metabolism (PCK1, LDHC) were analyzed using real-time quantitative PCR and compared between the two groups. Results: The number of retrieved oocytes, metaphase II oocytes, fertilized oocytes, day-3 embryos and top-quality day-3 embryos, clinical pregnancy rates and live birth rates were similar between the two groups except for significantly high progesterone levels in the LPOS group. The mRNA expression levels of CXCL1 (0.51 vs 1.00, p < 0.001) and PTGES (0.30 vs 1.00, p < 0.01) were significantly lower in the LPOS group than in the FPOS group. The LPOS group had significantly lower mRNA expression of NDUFB7 (0.12 vs 1.00, p < 0.001) and NDUFA4L2 (0.33 vs 1.00, p < 0.01) than the FPOS group. DAPK3 (3.81 vs 1.00, p < 0.05) and BCL6B (2.59 vs 1.00, p < 0.01) mRNA expression was significantly higher in the LPOS group than in the FPOS group. Increased expression of PCK1 (3.13 vs. 1.00, p < 0.001) and decreased expression of LDHC (0.12 vs. 1.00, p < 0.001) were observed in the LPOS group compared to the FPOS group. Conclusions: Our data revealed different CC genes expression involving in inflammation, oxidative phosphorylation, apoptosis and metabolism between LPOS and FPOS in PORs. However, the results are non-conclusive; further large-scale randomized controlled trials are needed to validate the results.
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Affiliation(s)
- Yu-Chen Chen
- Department of Obstetrics and Gynecology, Kaohsiung Veterans General Hospital, Kaohsiung City, Taiwan
| | - Ju-Yueh Li
- Department of Obstetrics and Gynecology, Kaohsiung Veterans General Hospital, Kaohsiung City, Taiwan
| | - Chia-Jung Li
- Department of Obstetrics and Gynecology, Kaohsiung Veterans General Hospital, Kaohsiung City, Taiwan
| | - Kuan-Hao Tsui
- Department of Obstetrics and Gynecology, Kaohsiung Veterans General Hospital, Kaohsiung City, Taiwan.,Department of Obstetrics and Gynecology, National Yang-Ming University School of Medicine, Taipei City, Taiwan.,Institute of BioPharmaceutical Sciences, National Sun Yat‑sen University, Kaohsiung City, Taiwan
| | - Peng-Hui Wang
- Department of Obstetrics and Gynecology, National Yang-Ming University School of Medicine, Taipei City, Taiwan.,Department of Obstetrics and Gynecology, Taipei Veterans General Hospital, Taipei City, Taiwan.,Department of Medical Research, China Medical University Hospital, Taichung City, Taiwan
| | - Zhi-Hong Wen
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung City, Taiwan
| | - Li-Te Lin
- Department of Obstetrics and Gynecology, Kaohsiung Veterans General Hospital, Kaohsiung City, Taiwan.,Department of Obstetrics and Gynecology, National Yang-Ming University School of Medicine, Taipei City, Taiwan.,Institute of BioPharmaceutical Sciences, National Sun Yat‑sen University, Kaohsiung City, Taiwan
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17
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Turhan A, Pereira MT, Schuler G, Bleul U, Kowalewski MP. Hypoxia-inducible factor (HIF1alpha) inhibition modulates cumulus cell function and affects bovine oocyte maturation in vitro†. Biol Reprod 2020; 104:479-491. [PMID: 33095229 PMCID: PMC7876663 DOI: 10.1093/biolre/ioaa196] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 08/04/2020] [Accepted: 08/26/2020] [Indexed: 12/16/2022] Open
Abstract
Various metabolic and hormonal factors expressed in cumulus cells are positively correlated with the in vitro maturation (IVM) of oocytes. However, the role of hypoxia sensing both during maturation of cumulus–oocyte complexes (COCs) as well as during the resumption of meiosis remains uncertain. HIF1alpha plays major roles in cellular responses to hypoxia, and here we investigated its role during bovine COC maturation by assessing the expression of related genes in cumulus cells. COCs were divided into the following groups: immature (control), in vitro matured (IVM/control), or matured in the presence of a blocker of HIF1alpha activity (echinomycin, IVM/E). We found an inhibition of cumulus cell expansion in IVM/E, compared with the IVM/control. Transcript levels of several factors (n = 13) were assessed in cumulus cells. Decreased expression of HAS2, TNFAIP6, TMSB4, TMSB10, GATM, GLUT1, CX43, COX2, PTGES, and STAR was found in IVM/E (P < 0.05). Additionally, decreased protein levels were detected for STAR, HAS2, and PCNA (P < 0.05), while activated-Caspase 3 remained unaffected in IVM/E. Progesterone output decreased in IVM/E. The application of PX-478, another blocker of HIF1alpha expression, yielded identical results. Negative effects of HIF1alpha suppression were further observed in the significantly decreased oocyte maturation and blastocyst rates from COCs matured with echinomycin (P < 0.05) or PX-478 (P < 0.05). These results support the importance of HIF1alpha for COC maturation and subsequent embryo development. HIF1alpha is a multidirectional factor controlling intercellular communication within COCs, steroidogenic activity, and oocyte development rates, and exerting effects on blastocyst rates.
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Affiliation(s)
- Aslihan Turhan
- Vetsuisse Faculty, Institute of Veterinary Anatomy, University of Zurich (UZH), Zurich, Switzerland.,Department of Farm Animals, Clinic of Reproductive Medicine, Vetsuisse Faculty University of Zurich, Zurich, Switzerland
| | - Miguel Tavares Pereira
- Vetsuisse Faculty, Institute of Veterinary Anatomy, University of Zurich (UZH), Zurich, Switzerland
| | - Gerhard Schuler
- Clinic for Obstetrics, Gynecology and Andrology of Large and Small Animals, Justus-Liebig-University, Giessen, Germany
| | - Ulrich Bleul
- Department of Farm Animals, Clinic of Reproductive Medicine, Vetsuisse Faculty University of Zurich, Zurich, Switzerland
| | - Mariusz P Kowalewski
- Vetsuisse Faculty, Institute of Veterinary Anatomy, University of Zurich (UZH), Zurich, Switzerland
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18
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Richani D, Dunning KR, Thompson JG, Gilchrist RB. Metabolic co-dependence of the oocyte and cumulus cells: essential role in determining oocyte developmental competence. Hum Reprod Update 2020; 27:27-47. [PMID: 33020823 DOI: 10.1093/humupd/dmaa043] [Citation(s) in RCA: 131] [Impact Index Per Article: 32.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 08/19/2020] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Within the antral follicle, the oocyte is reliant on metabolic support from its surrounding somatic cells. Metabolism plays a critical role in oocyte developmental competence (oocyte quality). In the last decade, there has been significant progress in understanding the metabolism of the cumulus-oocyte complex (COC) during its final stages of growth and maturation in the follicle. Certain metabolic conditions (e.g. obesity) or ART (e.g. IVM) perturb COC metabolism, providing insights into metabolic regulation of oocyte quality. OBJECTIVE AND RATIONALE This review provides an update on the progress made in our understanding of COC metabolism, and the metabolic conditions that influence both meiotic and developmental competence of the oocyte. SEARCH METHODS The PubMed database was used to search for peer-reviewed original and review articles. Searches were performed adopting the main terms 'oocyte metabolism', 'cumulus cell metabolism', 'oocyte maturation', 'oocyte mitochondria', 'oocyte metabolism', 'oocyte developmental competence' and 'oocyte IVM'. OUTCOMES Metabolism is a major determinant of oocyte quality. Glucose is an essential requirement for both meiotic and cytoplasmic maturation of the COC. Glucose is the driver of cumulus cell metabolism and is essential for energy production, extracellular matrix formation and supply of pyruvate to the oocyte for ATP production. Mitochondria are the primary source of ATP production within the oocyte. Recent advances in real-time live cell imaging reveal dynamic fluctuations in ATP demand throughout oocyte maturation. Cumulus cells have been shown to play a central role in maintaining adequate oocyte ATP levels by providing metabolic support through gap junctional communication. New insights have highlighted the importance of oocyte lipid metabolism for oocyte oxidative phosphorylation for ATP production, meiotic progression and developmental competence. Within the last decade, several new strategies for improving the developmental competence of oocytes undergoing IVM have emerged, including modulation of cyclic nucleotides, the addition of precursors for the antioxidant glutathione or endogenous maturation mediators such as epidermal growth factor-like peptides and growth differentiation factor 9/bone morphogenetic protein 15. These IVM additives positively alter COC metabolic endpoints commonly associated with oocyte competence. There remain significant challenges in the study of COC metabolism. Owing to the paucity in non-invasive or in situ techniques to assess metabolism, most work to date has used in vitro or ex vivo models. Additionally, the difficulty of measuring oocyte and cumulus cell metabolism separately while still in a complex has led to the frequent use of denuded oocytes, the results from which should be interpreted with caution since the oocyte and cumulus cell compartments are metabolically interdependent, and oocytes do not naturally exist in a naked state until after fertilization. There are emerging tools, including live fluorescence imaging and photonics probes, which may provide ways to measure the dynamic nature of metabolism in a single oocyte, potentially while in situ. WIDER IMPLICATIONS There is an association between oocyte metabolism and oocyte developmental competence. Advancing our understanding of basic cellular and biochemical mechanisms regulating oocyte metabolism may identify new avenues to augment oocyte quality and assess developmental potential in assisted reproduction.
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Affiliation(s)
- Dulama Richani
- School of Women's and Children's Health, Fertility & Research Centre, University of New South Wales Sydney, Sydney, NSW, Australia
| | - Kylie R Dunning
- Robinson Research Institute, Adelaide Medical School, The University of Adelaide, Adelaide, SA, Australia.,Australian Research Council Centre of Excellence for Nanoscale BioPhotonics, The University of Adelaide, Adelaide, SA, Australia.,Institute for Photonics and Advanced Sensing, The University of Adelaide, Adelaide, SA, Australia
| | - Jeremy G Thompson
- Robinson Research Institute, Adelaide Medical School, The University of Adelaide, Adelaide, SA, Australia.,Australian Research Council Centre of Excellence for Nanoscale BioPhotonics, The University of Adelaide, Adelaide, SA, Australia.,Institute for Photonics and Advanced Sensing, The University of Adelaide, Adelaide, SA, Australia
| | - Robert B Gilchrist
- School of Women's and Children's Health, Fertility & Research Centre, University of New South Wales Sydney, Sydney, NSW, Australia
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19
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Li WD, Zang CJ, Yin S, Shen W, Sun QY, Zhao M. Metformin protects against mouse oocyte apoptosis defects induced by arecoline. Cell Prolif 2020; 53:e12809. [PMID: 32557964 PMCID: PMC7377942 DOI: 10.1111/cpr.12809] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 03/19/2020] [Accepted: 03/24/2020] [Indexed: 12/11/2022] Open
Abstract
OBJECTIVES Arecoline is the main bioactive substance extracted from Areca catechu L, which has cell, neural and genetic toxicity. The function of arecoline in reproductive system has not been well explored. MATERIALS AND METHODS To investigate the toxic effects of arecoline on oocyte development, immunofluorescence staining, qPCR, Western blotting, sperm binding assays and in vitro fertilization were performed to evaluate oocyte meiosis competence and embryo development. RESULTS Our data revealed that arecoline exposure disrupts actin filament dynamics, spindle assembly and kinetochore-microtubule attachment stability in mouse oocytes, leading to aneuploidy and oocyte meiosis arrest. In addition, arecoline treatment disturbs the distribution of mitochondria, reduces ATP production and increases the level of oxidative stress, which ultimately induces oocyte apoptosis. Supplementation with metformin, a medicine for type 2 diabetes in the clinic, partially alleviates these damages. CONCLUSIONS Metformin has a protective effect on arecoline-induced mouse oocytes apoptosis.
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Affiliation(s)
- Wei-Dong Li
- College of Animal Science and Technology, Qingdao Agricultural University, Qingdao, China.,College of Life Sciences, Institute of Reproductive Sciences, Qingdao Agricultural University, Qingdao, China
| | - Chuan-Jie Zang
- College of Life Sciences, Institute of Reproductive Sciences, Qingdao Agricultural University, Qingdao, China
| | - Shen Yin
- College of Life Sciences, Institute of Reproductive Sciences, Qingdao Agricultural University, Qingdao, China
| | - Wei Shen
- College of Life Sciences, Institute of Reproductive Sciences, Qingdao Agricultural University, Qingdao, China
| | - Qing-Yuan Sun
- College of Life Sciences, Institute of Reproductive Sciences, Qingdao Agricultural University, Qingdao, China.,State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Minghui Zhao
- College of Life Sciences, Institute of Reproductive Sciences, Qingdao Agricultural University, Qingdao, China
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20
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Tscharke M, Kind K, Kelly J, Kleemann D, Len J. The Phosphodiesterase Inhibitor, Isobutyl-1-Methylxanthine Prevents the Sudden Drop in Cyclic Adenosine Monophosphate Concentration and Modulates Glucose Metabolism of Equine Cumulus-Oocyte Complexes Matured in Vitro. J Equine Vet Sci 2020; 91:103112. [PMID: 32684257 DOI: 10.1016/j.jevs.2020.103112] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 04/07/2020] [Accepted: 04/27/2020] [Indexed: 01/21/2023]
Abstract
Spontaneous nuclear maturation of mammalian oocytes can occur when physically removed from the ovarian follicle during in vitro oocyte maturation (IVM), largely because of a decrease in cyclic adenosine monophosphate (cAMP) concentration. Modulation of oocyte cAMP during IVM by using phosphodiesterase inhibitors has been shown to maintain elevated oocyte cAMP concentrations and control meiotic resumption of bovine and ovine oocytes. This study determined the effect of inclusion of isobutyl-1-methylxanthine (IBMX) during collection and the first 12 hours of incubation of equine oocytes on cAMP concentration and glucose metabolism of cumulus-oocyte complexes (COCs). Abattoir-derived COCs were collected in aspiration medium with (Asp-IBMX) or without (Asp) IBMX. Cumulus-oocyte complexes were then incubated for 12 hours in IVM medium with (Mat-IBMX) or without (Mat) IBMX, followed by additional 24 hours in Mat medium. The cAMP concentration, glucose consumption, lactate production, and metaphase II rates of the COCs were assessed. Cumulus-oocyte complexes aspirated into Asp-IBMX (62.2 ± 2.6 fmol per COC) medium had higher cAMP concentration than Asp (31.8 ± 2.8 fmol per COC) control group (P < .05). Likewise, at 12 hours of IVM, Mat-IBMX group (33.2 ± 2.1 fmol per COC) had higher cAMP concentration than the Mat group (7.68 ± 0.5 fmol per COC; P < .05). Glucose consumption and lactate production were lower during the first 12 hours of incubation in COCs cultured in Mat-IBMX (P < .05). Isobutyl-1-methylxanthine prevented the rapid drop in cAMP concentration and altered metabolism of glucose by the COC. Preventing the sudden drop in cAMP prevents the premature nuclear maturation of in vitro-matured oocytes causing poor developmental competence.
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Affiliation(s)
- Megan Tscharke
- School of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy, South Australia, Australia
| | - Karen Kind
- School of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy, South Australia, Australia
| | - Jennifer Kelly
- South Australian Research and Development Institute, Turretfield Research Centre, Rosedale, South Australia, Australia
| | - Dave Kleemann
- South Australian Research and Development Institute, Turretfield Research Centre, Rosedale, South Australia, Australia
| | - Jose Len
- School of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy, South Australia, Australia.
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21
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Wen J, Wang GL, Yuan HJ, Zhang J, Xie HL, Gong S, Han X, Tan JH. Effects of glucose metabolism pathways on nuclear and cytoplasmic maturation of pig oocytes. Sci Rep 2020; 10:2782. [PMID: 32066834 PMCID: PMC7026050 DOI: 10.1038/s41598-020-59709-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Accepted: 02/03/2020] [Indexed: 12/11/2022] Open
Abstract
The developmental competence of IVM porcine oocytes is still low compared with that in their in vivo counterparts. Although many studies reported effects of glucose metabolism (GM) on oocyte nuclear maturation, few reported on cytoplasmic maturation. Previous studies could not differentiate whether GM of cumulus cells (CCs) or that of cumulus-denuded oocytes (DOs) supported oocyte maturation. Furthermore, species differences in oocyte GM are largely unknown. Our aim was to address these issues by using enzyme activity inhibitors, RNAi gene silencing and special media that could support nuclear but not cytoplasmic maturation when GM was inhibited. The results showed that GM in CCs promoted pig oocyte maturation by releasing metabolites from both pentose phosphate pathway and glycolysis. Both pyruvate and lactate were transferred into pig DOs by monocarboxylate transporter and pyruvate was further delivered into mitochondria by mitochondrial pyruvate carrier in both pig DOs and CCs. In both pig DOs and CCs, pyruvate and lactate were utilized through mitochondrial electron transport and LDH-catalyzed oxidation to pyruvate, respectively. Pig and mouse DOs differed in their CC dependency for glucose, pyruvate and lactate utilization. While mouse DOs could not, pig DOs could use the lactate-derived pyruvate.
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Affiliation(s)
- Jing Wen
- College of Life Science, Northeast Agricultural University, Harbin, 150030, P.R. China
| | - Guo-Liang Wang
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an City, 271018, P.R. China
| | - Hong-Jie Yuan
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an City, 271018, P.R. China
| | - Jie Zhang
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an City, 271018, P.R. China
| | - Hong-Li Xie
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an City, 271018, P.R. China
| | - Shuai Gong
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an City, 271018, P.R. China
| | - Xiao Han
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an City, 271018, P.R. China
| | - Jing-He Tan
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an City, 271018, P.R. China. .,College of Life Science, Northeast Agricultural University, Harbin, 150030, P.R. China.
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22
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Lowe JL, Bathgate R, Grupen CG. Effect of carbohydrates on lipid metabolism during porcine oocyte IVM. Reprod Fertil Dev 2019; 31:557-569. [PMID: 31039975 DOI: 10.1071/rd18043] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 09/12/2018] [Indexed: 01/06/2023] Open
Abstract
Porcine oocytes contain a large amount of endogenous lipid, which is thought to function as an intracellular source of energy. The aim of this study was to determine the effects of stimulating or inhibiting lipid metabolism using l-carnitine or etomoxir respectively on the IVM of porcine oocytes cultured in media of varying carbohydrate composition. In the presence of pyruvate and lactate, exclusion of glucose inhibited oocyte nuclear and cytoplasmic maturation compared with oocytes matured in media containing low (1.5mM) and high (4.0mM) concentrations of glucose. In the absence of pyruvate and lactate in low-glucose medium only, a greater proportion of l-carnitine-treated oocytes progressed to the MII stage compared with untreated oocytes. The inclusion of pyruvate and lactate significantly altered the distribution of cytoplasmic lipid droplets and elevated the ATP content of oocytes, whereas the l-carnitine treatment did not. Further, the inhibitory effect of etomoxir on nuclear maturation was decreased in high- compared with low-glucose medium. The results indicate that carbohydrate substrates are absolutely necessary for effective porcine oocyte maturation, and that l-carnitine supplementation can only partially compensate for deficiencies in carbohydrate provision.
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Affiliation(s)
- Jenna L Lowe
- Sydney School of Veterinary Science, Faculty of Science, The University of Sydney, 425 Werombi Road, Camden, NSW 2570, Australia
| | - Roslyn Bathgate
- Sydney School of Veterinary Science, Faculty of Science, The University of Sydney, 425 Werombi Road, Camden, NSW 2570, Australia
| | - Christopher G Grupen
- Sydney School of Veterinary Science, Faculty of Science, The University of Sydney, 425 Werombi Road, Camden, NSW 2570, Australia
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23
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Warzych E, Lipinska P. Energy metabolism of follicular environment during oocyte growth and maturation. J Reprod Dev 2019; 66:1-7. [PMID: 31787727 PMCID: PMC7040205 DOI: 10.1262/jrd.2019-102] [Citation(s) in RCA: 70] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Oocyte quality is affected by many factors, among which the environment of growth and maturation seems to be crucial. Studies show that well balanced oocyte energy metabolism has a significant impact on several elements of cytoplasmic and nuclear maturation as well as further embryo developmental competence. Therefore homeostasis between metabolism of glucose and fatty acids in the oocyte is being widely described nowadays. This review aims to discuss the follicular (in vivo) or maturation media (in vitro) environments with regard to glucose and fatty acid metabolism, as the main sources of the energy for the oocyte. A great emphasis is given on the balance between those two metabolic pathways and its further impact on female fertility.
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Affiliation(s)
- Ewelina Warzych
- Department of Genetics and Animal Breeding, Poznan University of Life Sciences, Poznan 60-637, Poland
| | - Paulina Lipinska
- Department of Genetics and Animal Breeding, Poznan University of Life Sciences, Poznan 60-637, Poland
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24
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Wang Q, Tang SB, Song XB, Deng TF, Zhang TT, Yin S, Luo SM, Shen W, Zhang CL, Ge ZJ. High-glucose concentrations change DNA methylation levels in human IVM oocytes. Hum Reprod 2019; 33:474-481. [PMID: 29377995 DOI: 10.1093/humrep/dey006] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Accepted: 01/12/2018] [Indexed: 01/01/2023] Open
Abstract
STUDY QUESTION What are the effects of high-glucose concentrations on DNA methylation of human oocytes? SUMMARY ANSWER High-glucose concentrations altered DNA methylation levels of Peg3 and Adiponectin in human in vitro maturation oocytes. WHAT IS KNOWN ALREADY Maternal diabetes has a detrimental influence on oocyte quality including epigenetic modifications, as shown in non-human mammalian species. STUDY DESIGN, SIZE, DURATION Immature metaphase I (MI) stage oocytes of good quality were retrieved from patients who had normal ovarian potential and who underwent ICSI in the Reproductive Medicine Center of People's Hospital of Zhengzhou University. MI oocytes were cultured in medium with different glucose concentrations (control, 10 mM and 15 mM) in vitro and 48 h later, oocytes with first polar body extrusion were collected to check the DNA methylation levels. PARTICIPANTS/MATERIALS, SETTING, METHODS MI oocytes underwent in vitro maturation (IVM) at 37°C with 5% mixed gas for 48 h. Then the mature oocytes were treated with bisulfite buffer. Target sequences were amplified using nested or half-nested PCR and the DNA methylation status was tested using combined bisulfite restriction analysis (COBRA) and bisulfite sequencing (BS). MAIN RESULTS AND THE ROLE OF CHANCE High-glucose concentrations significantly decreased the first polar body extrusion rate. Compared to controls, the DNA methylation levels of Peg3 in human IVM oocytes were significantly higher in 10 mM (P < 0.001) and 15 mM (P < 0.001) concentrations of glucose. But the DNA methylation level of H19 was not affected by high-glucose concentrations in human IVM oocytes. We also found that there was a decrease in DNA methylation levels in the promoter of adiponectin in human IVM oocytes between controls and oocytes exposed to 10 mM glucose (P = 0.028). LARGE SCALE DATA N/A. LIMITATIONS REASONS FOR CAUTION It is not clear whether the alterations are beneficial or not for the embryo development and offspring health. The effects of high-glucose concentrations on the whole process of oocyte maturation are still not elucidated. Another issue is that the number of oocytes used in this study was limited. WIDER IMPLICATIONS OF THE FINDINGS This is the first time that the effects of high-glucose concentration on DNA methylation of human oocytes have been elucidated. Our result indicates that in humans, the high risk of chronic diseases in offspring from diabetic mothers may originate from abnormal DNA modifications in oocytes. STUDY FUNDING/COMPETING INTEREST(S) This work was supported by the fund of National Natural Science Foundation of China (81401198) and Doctor Foundation of Qingdao Agricultural University (1116008).The authors declare that there are no potential conflicts of interest relevant to this article.
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Affiliation(s)
- Qian Wang
- Reproductive Medicine Center of People's Hospital of Zhengzhou University, Zhengzhou 450003, Henan Province, P.R. China.,Reproductive Medicine Center of Henan Provincial People's Hospital, Zhengzhou 450003, Henan Province, P.R. China
| | - Shou-Bin Tang
- Department of Biology, College of Life Sciences, Institute of Reproductive Sciences, Qingdao Agricultural University, 700# Changcheng Road, Chengyang District, Qingdao 266109, P.R. China
| | - Xiao-Bing Song
- Reproductive Medicine Center of People's Hospital of Zhengzhou University, Zhengzhou 450003, Henan Province, P.R. China.,Reproductive Medicine Center of Henan Provincial People's Hospital, Zhengzhou 450003, Henan Province, P.R. China
| | - Teng-Fei Deng
- Reproductive Medicine Center of People's Hospital of Zhengzhou University, Zhengzhou 450003, Henan Province, P.R. China.,Reproductive Medicine Center of Henan Provincial People's Hospital, Zhengzhou 450003, Henan Province, P.R. China
| | - Ting-Ting Zhang
- Reproductive Medicine Center of People's Hospital of Zhengzhou University, Zhengzhou 450003, Henan Province, P.R. China.,Reproductive Medicine Center of Henan Provincial People's Hospital, Zhengzhou 450003, Henan Province, P.R. China
| | - Shen Yin
- Department of Biology, College of Life Sciences, Institute of Reproductive Sciences, Qingdao Agricultural University, 700# Changcheng Road, Chengyang District, Qingdao 266109, P.R. China
| | - Shi-Ming Luo
- Department of Biology, College of Life Sciences, Institute of Reproductive Sciences, Qingdao Agricultural University, 700# Changcheng Road, Chengyang District, Qingdao 266109, P.R. China
| | - Wei Shen
- Department of Biology, College of Life Sciences, Institute of Reproductive Sciences, Qingdao Agricultural University, 700# Changcheng Road, Chengyang District, Qingdao 266109, P.R. China
| | - Cui-Lian Zhang
- Reproductive Medicine Center of People's Hospital of Zhengzhou University, Zhengzhou 450003, Henan Province, P.R. China.,Reproductive Medicine Center of Henan Provincial People's Hospital, Zhengzhou 450003, Henan Province, P.R. China
| | - Zhao-Jia Ge
- Department of Biology, College of Life Sciences, Institute of Reproductive Sciences, Qingdao Agricultural University, 700# Changcheng Road, Chengyang District, Qingdao 266109, P.R. China
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25
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Li WD, Yu S, Luo SM, Shen W, Yin S, Sun QY. Melatonin defends mouse oocyte quality from benzo[ghi]perylene-induced deterioration. J Cell Physiol 2018; 234:6220-6229. [PMID: 30317565 DOI: 10.1002/jcp.27351] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Accepted: 08/17/2018] [Indexed: 12/24/2022]
Abstract
Benzo[ghi]perylene (B[ghi]P) is a polycyclic aromatic hydrocarbon widely found in haze. Long-term exposure to humans or animals can cause serious damage to the respiratory system. Melatonin is an endogenous natural hormone synthesized and released by the pineal gland. In this study, we investigated the effects of melatonin on in vitro cultured B[ghi]P-exposed mouse oocytes and the protective roles of melatonin. Our data indicate that B[ghi]P exposure leads to meiotic maturation arrest and reduced ability of sperm binding and parthenogenetic activation. Also, B[ghi]P exposure disrupts actin filament dynamics, spindle assembly, and kinetochore-microtubule attachment stability, which results in oocyte aneuploidy. Simultaneously, B[ghi]P exposure disturbs the distribution of mitochondria, increases the level of oxidative stress, and induces apoptosis of oocytes. Whereas all of these toxic effects of B[ghi]P can be restored after melatonin supplement. In conclusion, our findings validate that melatonin has a certain protective effect on preventing the reduced oocyte quality caused by B[ghi]P exposure during meiotic maturation in mouse oocytes.
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Affiliation(s)
- Wei-Dong Li
- College of Animal Science and Technology, College of Life Sciences, Institute of Reproductive Sciences, Qingdao Agricultural University, Qingdao, China
| | - Shuai Yu
- College of Animal Science and Technology, College of Life Sciences, Institute of Reproductive Sciences, Qingdao Agricultural University, Qingdao, China
| | - Shi-Ming Luo
- College of Animal Science and Technology, College of Life Sciences, Institute of Reproductive Sciences, Qingdao Agricultural University, Qingdao, China
| | - Wei Shen
- College of Animal Science and Technology, College of Life Sciences, Institute of Reproductive Sciences, Qingdao Agricultural University, Qingdao, China
| | - Shen Yin
- College of Animal Science and Technology, College of Life Sciences, Institute of Reproductive Sciences, Qingdao Agricultural University, Qingdao, China
| | - Qing-Yuan Sun
- College of Animal Science and Technology, College of Life Sciences, Institute of Reproductive Sciences, Qingdao Agricultural University, Qingdao, China.,State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
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26
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Yang LL, Cui YX, Ma JY, Ge ZJ, Shen W, Yin S. Tributyltin oxide exposure impairs mouse oocyte maturation and its possible mechanisms. J Cell Biochem 2018; 120:715-726. [PMID: 30191590 DOI: 10.1002/jcb.27429] [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: 04/09/2018] [Accepted: 07/12/2018] [Indexed: 11/07/2022]
Abstract
Tributyltin oxide (TBTO) has been widely used as marine antifouling composition, preservative, biocide, and a stabilizer in plastic industry. Previous studies have indicated that TBTO can cause immunotoxicity as an environmental pollutant. However, little is known about its reproductive toxicity, especially on female oocyte maturation and the underlying mechanisms. In this study, mouse oocytes were cultured with different concentrations of TBTO in vitro, and several crucial events during meiotic maturation were evaluated. We found that the first polar body extrusion rate was significantly reduced, which reflected the disruption of meiotic maturation. The rate of abnormal spindle organization increased significantly, accompanied with a higher rate of chromosome misalignment. In addition, TBTO treatment increased reactive oxygen species generation markedly, which also accelerated the early-stage apoptosis. Moreover, heterogeneous mitochondrial distribution, mitochondrial dysfunction, and higher rate of aneuploidy were detected, which consequently disrupted in vitro fertilization. In conclusion, our results indicated that TBTO exposure could impair mouse oocyte maturation by affecting spindle organization, chromosome alignment, mitochondria functions, oxidative stress, and apoptosis.
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Affiliation(s)
- Lei-Lei Yang
- Institute of Reproductive Sciences, College of Life Sciences, Qingdao Agricultural University, Qingdao, China
| | - Ying-Xue Cui
- Institute of Reproductive Sciences, College of Life Sciences, Qingdao Agricultural University, Qingdao, China
| | - Jun-Yu Ma
- Institute of Reproductive Sciences, College of Life Sciences, Qingdao Agricultural University, Qingdao, China
| | - Zhao-Jia Ge
- Institute of Reproductive Sciences, College of Life Sciences, Qingdao Agricultural University, Qingdao, China
| | - Wei Shen
- Institute of Reproductive Sciences, College of Life Sciences, Qingdao Agricultural University, Qingdao, China
| | - Shen Yin
- Institute of Reproductive Sciences, College of Life Sciences, Qingdao Agricultural University, Qingdao, China
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27
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González-Fernández L, Sánchez-Calabuig MJ, Alves MG, Oliveira PF, Macedo S, Gutiérrez-Adán A, Rocha A, Macías-García B. Expanded equine cumulus-oocyte complexes exhibit higher meiotic competence and lower glucose consumption than compact cumulus-oocyte complexes. Reprod Fertil Dev 2018; 30:297-306. [PMID: 28679463 DOI: 10.1071/rd16441] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Accepted: 06/06/2017] [Indexed: 12/29/2022] Open
Abstract
Equine cumulus-oocyte complexes (COCs) are classified as compact (cCOC) or expanded (eCOC) and vary in their meiotic competence. This difference could be related to divergent glucose metabolism. To test this hypothesis in the present study, eCOCs, cCOCs and expanded or compact mural granulosa cells (EC and CC respectively) were matured in vitro for 30h, at which time maturation rate, glucose metabolism and the expression of genes involved in glucose transport, glycolysis, apoptosis and meiotic competence were determined. There were significant differences between eCOCs and cCOCs in maturation rate (50% vs 21.7% (n=192 and 46) respectively; P<0.001), as well as mean (±s.e.m.) glucose consumption (1.8±0.5 vs 27.9±5.9 nmol per COC respectively) and pyruvate (0.09±0.01 vs 2.4±0.8 nmol per COC respectively) and lactate (4.7±1.3 vs 64.1±20.6 nmol per COC respectively; P<0.05 for all) production. Glucose consumption in EC and CC did not differ significantly. Expression of hyaluronan-binding protein (tumour necrosis factor alpha induced protein 6; TNFAIP6) was increased in eCOCs and EC, and solute carrier family 2 member 1 (SLC2A1) expression was increased in eCOCs, but there were no differences in the expression of glycolysis-related enzymes and solute carrier family 2 member 3 (SLC2A3) between the COC or mural granulosa cell types. The findings of the present study demonstrate that metabolic and genomic differences exist between eCOCs and cCOCs and mural granulosa cells in the horse.
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Affiliation(s)
- L González-Fernández
- Centro de Estudos de Ciência Animal/Instituto de Ciências, Tecnologias e Agroambiente; Instituto de Ciências Biomédicas Abel Salazar, University of Porto, Campus Agrario de Vairão, Rua Padre Armando Quintas, 4485-661 Vairão, Portugal
| | - M J Sánchez-Calabuig
- Department of Animal Reproduction, Instituto nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Ctra. De la Coruña,Km. 5.9, Madrid 28040, Spain
| | - M G Alves
- Department of Microscopy, Cell Biology Laboratory, Abel Salazar Institute of Biomedical Sciences and Unit for Multidisciplinary Research in Biomedicine (UMIB), University of Porto, Porto, Portugal
| | - P F Oliveira
- Department of Microscopy, Cell Biology Laboratory, Abel Salazar Institute of Biomedical Sciences and Unit for Multidisciplinary Research in Biomedicine (UMIB), University of Porto, Porto, Portugal
| | - S Macedo
- Centro de Estudos de Ciência Animal/Instituto de Ciências, Tecnologias e Agroambiente; Instituto de Ciências Biomédicas Abel Salazar, University of Porto, Campus Agrario de Vairão, Rua Padre Armando Quintas, 4485-661 Vairão, Portugal
| | - A Gutiérrez-Adán
- Department of Animal Reproduction, Instituto nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Ctra. De la Coruña,Km. 5.9, Madrid 28040, Spain
| | - A Rocha
- Centro de Estudos de Ciência Animal/Instituto de Ciências, Tecnologias e Agroambiente; Instituto de Ciências Biomédicas Abel Salazar, University of Porto, Campus Agrario de Vairão, Rua Padre Armando Quintas, 4485-661 Vairão, Portugal
| | - B Macías-García
- Centro de Estudos de Ciência Animal/Instituto de Ciências, Tecnologias e Agroambiente; Instituto de Ciências Biomédicas Abel Salazar, University of Porto, Campus Agrario de Vairão, Rua Padre Armando Quintas, 4485-661 Vairão, Portugal
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28
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Wang H, Cheng Q, Li X, Hu F, Han L, Zhang H, Li L, Ge J, Ying X, Guo X, Wang Q. Loss of TIGAR Induces Oxidative Stress and Meiotic Defects in Oocytes from Obese Mice. Mol Cell Proteomics 2018; 17:1354-1364. [PMID: 29776966 DOI: 10.1074/mcp.ra118.000620] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Revised: 04/25/2018] [Indexed: 12/26/2022] Open
Abstract
Maternal obesity has been reported to impair oocyte quality in mice, however, the underlying mechanisms remain unclear. In the present study, by conducting a comparative proteomic analysis, we identified a reduced expression of TIGAR (TP53-induced glycolysis and apoptosis regulator) protein in ovulated oocytes from high-fat diet (HFD)-fed mice. Specific depletion of TIGAR in mouse oocytes results in the marked elevation of reactive oxygen species (ROS) levels and the failure of meiotic apparatus assembly. Importantly, forced expression of TIGAR in HFD oocytes not only attenuates ROS production, but also partly prevents spindle disorganization and chromosome misalignment during meiosis. Meantime, we noted that TIGAR knockdown in oocytes induces a strong activation of autophagy, whereas overexpression of TIGAR significantly reduces the LC3 accumulation in HFD oocytes. By anti-oxidant treatment, we further demonstrated that such an autophagic response is dependent on the TIGAR-controlled ROS production. In summary, our data indicate a role for TIGAR in modulating redox homeostasis during oocyte maturation, and uncover that loss of TIGAR is a critical pathway mediating the effects of maternal obesity on oocyte quality.
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Affiliation(s)
- Haichao Wang
- From the ‡State Key Laboratory of Reproductive Medicine, Nanjing Medical University
| | - Qing Cheng
- §Departement of Obstetrics, Obstetrics and Gynecology Hospital Affiliated to Nanjing Medical University
| | - Xiaoyan Li
- From the ‡State Key Laboratory of Reproductive Medicine, Nanjing Medical University.,¶College of Animal Science & Technology, Nanjing Agricultural University
| | - Feifei Hu
- ‖Department of Obstetrics and Gynecology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China, 210000
| | - Longsen Han
- From the ‡State Key Laboratory of Reproductive Medicine, Nanjing Medical University
| | - Hao Zhang
- From the ‡State Key Laboratory of Reproductive Medicine, Nanjing Medical University
| | - Ling Li
- From the ‡State Key Laboratory of Reproductive Medicine, Nanjing Medical University
| | - Juan Ge
- From the ‡State Key Laboratory of Reproductive Medicine, Nanjing Medical University
| | - Xiaoyan Ying
- ‖Department of Obstetrics and Gynecology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China, 210000
| | - Xuejiang Guo
- From the ‡State Key Laboratory of Reproductive Medicine, Nanjing Medical University;
| | - Qiang Wang
- From the ‡State Key Laboratory of Reproductive Medicine, Nanjing Medical University;
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Mahmoud YI, Mahmoud AA, Abo-Zeid FS, Fares NH. Effects of dehydroepiandrosterone on the ovarian reserve and pregnancy outcomes in perimenopausal rats (DHEA and fertility in perimenopausal rats). Life Sci 2018. [DOI: 10.1016/j.lfs.2018.03.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Kansaku K, Itami N, Kawahara-Miki R, Shirasuna K, Kuwayama T, Iwata H. Differential effects of mitochondrial inhibitors on porcine granulosa cells and oocytes. Theriogenology 2017; 103:98-103. [PMID: 28779614 DOI: 10.1016/j.theriogenology.2017.07.049] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Revised: 07/20/2017] [Accepted: 07/29/2017] [Indexed: 10/19/2022]
Abstract
Oocytes and granulosa cells rely primarily on mitochondrial respiration and glycolysis for energy production, respectively. The present study examined the effect of mitochondrial inhibitors on the ATP contents of oocytes and granulosa cells. Cumulus cell-oocyte complexes (COCs) and granulosa cells (GCs) were collected from the antral follicles of porcine ovaries. Treatment of denuded oocytes with either carbonyl cyanide m-chlorophenyl hydrazine (CCCP), antimycin, or oligomycin significantly reduced ATP content to very low levels (CCCP, 0.12 pM; antimycin, 0.07 pM; and oligomycin, 0.25 pM; P < 0.05), whereas treatment with a glycolysis inhibitor (bromopyruvic acid, BA) had no effect. Conversely, the ATP content of granulosa cells was significantly reduced by treatment with the glycolysis inhibitor but was not affected by the mitochondrial inhibitors (ATP/10,000 cells; control, 1.78 pM and BA, 0.32 pM; P < 0.05). Reactive oxygen species (ROS) generation after CCCP treatment was greater in oocytes (1.6-fold) than that seen in granulosa cells (1.08-fold). Oocytes surrounded by granulosa cells had higher ATP levels than denuded oocytes. Treatment of COCs with CCCP reduced, but did not completely abolish, ATP content in oocytes (control, 3.15 pM and CCCP, 0.52 pM; P < 0.05), whereas treatment with CCCP plus a gap junction inhibitor, 18α-glycyrrhetinic acid, and CCCP decreased the ATP content to even lower levels (0.29 pM; P < 0.05). These results suggest that granulosa cells are dependent on glycolysis and provide energy to oocytes through gap junctions, even after treatment with CCCP.
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Affiliation(s)
- Kazuki Kansaku
- Tokyo University of Agriculture, Funako 1737, Atsugi 243-0034, Japan
| | - Nobuhiko Itami
- Tokyo University of Agriculture, Funako 1737, Atsugi 243-0034, Japan
| | | | - Koumei Shirasuna
- Tokyo University of Agriculture, Funako 1737, Atsugi 243-0034, Japan
| | - Takehito Kuwayama
- Tokyo University of Agriculture, Funako 1737, Atsugi 243-0034, Japan
| | - Hisataka Iwata
- Tokyo University of Agriculture, Funako 1737, Atsugi 243-0034, Japan.
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Nahar A, Kadokawa H. Suppressed expression of macrophage migration inhibitory factor in the oviducts of lean and obese cows. Reprod Fertil Dev 2017; 28:655-62. [PMID: 25426961 DOI: 10.1071/rd14164] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2014] [Accepted: 10/11/2014] [Indexed: 02/05/2023] Open
Abstract
Oviducts synthesise macrophage migration inhibitory factor (MIF) to promote sperm capacitation and embryogenesis. This study aimed to test a hypothesis that the oviducts of obese cows may express MIF at a lower level than those of normal and lean cows. Ampullar and isthmic oviduct sections were collected from lean (n=5; body condition score (BCS) on a 5-point scale, 2.5), normal (n=6; BCS, 3.0) and obese (n=5; BCS, 4.0) Japanese Black cows. MIF mRNA and protein were extracted from ampullae and isthmuses and their levels measured by real-time polymerase chain reaction or western blot. Immunohistochemistry was performed on frozen sections of ampullae and isthmuses by using antibodies to MIF. MIF mRNA and protein expression were lower in the obese and lean groups than in the normal group (P<0.05). Immunohistochemistry revealed that the primary site of MIF expression in the ampulla and isthmus is the tunica mucosa. In conclusion, obese cows have suppressed MIF expression in the ampullae and isthmuses of their oviducts, as hypothesised, but, unexpectedly, MIF expression was also lower in lean cows.
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Affiliation(s)
- Asrafun Nahar
- Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi-shi, Yamaguchi-ken 1677-1, Japan
| | - Hiroya Kadokawa
- Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi-shi, Yamaguchi-ken 1677-1, Japan
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Yuan B, Liang S, Kwon JW, Jin YX, Park SH, Wang HY, Sun TY, Zhang JB, Kim NH. The Role of Glucose Metabolism on Porcine Oocyte Cytoplasmic Maturation and Its Possible Mechanisms. PLoS One 2016; 11:e0168329. [PMID: 27997591 PMCID: PMC5173360 DOI: 10.1371/journal.pone.0168329] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Accepted: 11/30/2016] [Indexed: 12/30/2022] Open
Abstract
In the present study, we investigated the potential role of glucose and pyruvate in the cytoplasmic maturation of porcine oocytes by investigating the effect of glucose and/or pyruvate supplementation, in the presence or absence of 10% porcine follicular fluid (PFF), on meiotic maturation and subsequent embryo development. In the absence of 10% PFF, without exogenous addition of glucose and pyruvate, the medium seemed unable to support maturation. In the presence of 10% PFF, the addition of 5.6 mM glucose and/or 2 mM pyruvate during in vitro maturation of cumulus enclosed oocytes increased MII oocyte and blastocyst rates. In contrast, oocytes denuded of cumulus cells were not able to take full advantage of the glucose in the medium, as only pyruvate was able to increase the MII rate and the subsequent early embryo developmental ability. Treatment of cumulus enclosed oocytes undergoing maturation with 200 μM dehydroepiandrosterone (DHEA), a pentose phosphate pathway inhibitor, or 2 μM iodoacetate (IA), a glycolysis inhibitor, significantly reduced GHS, intra-oocyte ATP, maternal gene expression, and MPF activity levels. DHEA was also able to increase ROS and reduce the levels of NADPH. Moreover, blastocysts of the DHEA- or IA-treated groups presented higher apoptosis rates and markedly lower cell proliferation cell rates than those of the non-treated group. In conclusion, our results suggest that oocytes maturing in the presence of 10% PFF can make full use of energy sources through glucose metabolism only when they are accompanied by cumulus cells, and that pentose phosphate pathway (PPP) and glycolysis promote porcine oocyte cytoplasmic maturation by supplying energy, regulating maternal gene expression, and controlling MPF activity.
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Affiliation(s)
- Bao Yuan
- Department of Laboratory Animals, College of Animal Sciences, Jilin University, Changchun, Jilin, China
- Molecular Embryology Laboratory, Department of Animal Sciences, Chungbuk National University, Cheongju, Chungbuk, South Korea
| | - Shuang Liang
- Molecular Embryology Laboratory, Department of Animal Sciences, Chungbuk National University, Cheongju, Chungbuk, South Korea
| | - Jeong-Woo Kwon
- Molecular Embryology Laboratory, Department of Animal Sciences, Chungbuk National University, Cheongju, Chungbuk, South Korea
| | - Yong-Xun Jin
- Department of Laboratory Animals, College of Animal Sciences, Jilin University, Changchun, Jilin, China
- Molecular Embryology Laboratory, Department of Animal Sciences, Chungbuk National University, Cheongju, Chungbuk, South Korea
| | - Shun-Ha Park
- Molecular Embryology Laboratory, Department of Animal Sciences, Chungbuk National University, Cheongju, Chungbuk, South Korea
| | - Hai-Yang Wang
- Molecular Embryology Laboratory, Department of Animal Sciences, Chungbuk National University, Cheongju, Chungbuk, South Korea
| | - Tian-Yi Sun
- Molecular Embryology Laboratory, Department of Animal Sciences, Chungbuk National University, Cheongju, Chungbuk, South Korea
| | - Jia-Bao Zhang
- Department of Laboratory Animals, College of Animal Sciences, Jilin University, Changchun, Jilin, China
- * E-mail: (NHK); (JBZ)
| | - Nam-Hyung Kim
- Department of Laboratory Animals, College of Animal Sciences, Jilin University, Changchun, Jilin, China
- Molecular Embryology Laboratory, Department of Animal Sciences, Chungbuk National University, Cheongju, Chungbuk, South Korea
- * E-mail: (NHK); (JBZ)
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Alvarez GM, Casiró S, Gutnisky C, Dalvit GC, Sutton-McDowall ML, Thompson JG, Cetica PD. Implications of glycolytic and pentose phosphate pathways on the oxidative status and active mitochondria of the porcine oocyte during IVM. Theriogenology 2016; 86:2096-2106. [DOI: 10.1016/j.theriogenology.2015.11.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Revised: 11/04/2015] [Accepted: 11/09/2015] [Indexed: 11/24/2022]
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Eshtiyaghi M, Deldar H, Pirsaraei ZA, Shohreh B. Royal jelly may improve the metabolism of glucose and redox state of ovine oocytes matured in vitro and embryonic development following in vitro fertilization. Theriogenology 2016; 86:2210-2221. [PMID: 27568457 DOI: 10.1016/j.theriogenology.2016.07.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Revised: 07/12/2016] [Accepted: 07/16/2016] [Indexed: 01/15/2023]
Abstract
The aim of this study was to investigate the effect of different concentrations of royal jelly (RJ) on in vitro maturation (IVM), fertilization, cleavage, blastocyst rates, glutathione (GSH) content in ovine oocyte, mRNA abundance of antioxidant enzymes in both oocyte and cumulus, and glucose metabolism-related genes in cumulus cells. In vitro maturation of oocyte was performed in the presence of control (RJ0), 2.5 (RJ2.5), 5 (RJ5), and 10 (RJ10) mg/mL of RJ. Nuclear status, intracellular GSH content in oocytes, and mRNA abundance of selected genes were evaluated following 24 hours of IVM. Following the IVM, fertilization and embryo culture were carried out in all the groups and embryonic development was examined. The addition of 10-mg/mL RJ to maturation media not only yielded a higher number of oocytes at MII stage but also showed an increased level of intracellular GSH content than did RJ2.5 and control groups. Fertilization, cleavage, and blastocyst rate were higher in the RJ10 treatment group in comparison to the control one. In cumulus cells, the expression of PFKM, PFKL, and G6PDH were increased following the addition of RJ to the maturation media. Supplementation of 10-mg/mL RJ to IVM medium increased the GPx mRNA abundance in both oocyte and cumulus cells and SOD expression in the cumulus cells. The CAT mRNA abundance was not influenced by the addition of RJ to the maturation media in either oocyte or cumulus cells. It seems that the improvement of oocyte maturation and its subsequent development in RJ10 group may be associated with amelioration of redox status in the oocytes and activation of glucose metabolic pathways in their surrounding cumulus cells.
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Affiliation(s)
- Mahbobeh Eshtiyaghi
- Department of Animal Science, College of Animal Science and Fisheries, Sari Agricultural Sciences and Natural Resources University, Sari, Iran
| | - Hamid Deldar
- Department of Animal Science, College of Animal Science and Fisheries, Sari Agricultural Sciences and Natural Resources University, Sari, Iran.
| | - Zarbakht Ansari Pirsaraei
- Department of Animal Science, College of Animal Science and Fisheries, Sari Agricultural Sciences and Natural Resources University, Sari, Iran
| | - Bahram Shohreh
- Department of Animal Science, College of Animal Science and Fisheries, Sari Agricultural Sciences and Natural Resources University, Sari, Iran
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Xie HL, Wang YB, Jiao GZ, Kong DL, Li Q, Li H, Zheng LL, Tan JH. Effects of glucose metabolism during in vitro maturation on cytoplasmic maturation of mouse oocytes. Sci Rep 2016; 6:20764. [PMID: 26857840 PMCID: PMC4746733 DOI: 10.1038/srep20764] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2015] [Accepted: 01/12/2016] [Indexed: 11/10/2022] Open
Abstract
Although there are many reports on the effect of glucose metabolism on oocyte nuclear maturation, there are few studies on its effect on ooplasmic maturation. By manipulating glucose metabolism pathways using a maturation medium that could support oocyte nuclear maturation but only a limited blastocyst formation without glucose, this study determined effects of glucose metabolism pathways on ooplasmic maturation. During maturation of cumulus-oocyte-complexes (COCs) with glucose, the presence of PPP inhibitor, DHEA or glycolysis inhibitor, iodoacetate significantly decreased blastocyst rates, intraoocyte glutathione and ATP. While blastocyst rates, GSH/GSSG ratio and NADPH were higher, ROS was lower significantly in COCs matured with iodoacetate than with DHEA. Fructose-6-phosphate overcame the inhibitory effect of DHEA on PPP. During maturation of COCs with pyruvate, electron transport inhibitor, rotenone or monocarboxylate transfer inhibitor, 4-CIN significantly decreased blastocyst rates. Cumulus-denuded oocytes had a limited capacity to use glucose or lactate, but they could use pyruvate to support maturation. In conclusion, whereas glycolysis promoted ooplasmic maturation mainly by supplying energy, PPP facilitated ooplasmic maturation to a greater extent by both reducing oxidative stress and supplying energy through providing fructose-6-phosphate for glycolysis. Pyruvate was transferred by monocarboxylate transporters and utilized through mitochondrial electron transport to sustain ooplasmic maturation.
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Affiliation(s)
- Hong-Li Xie
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai-an City 271018, P. R. China
| | - Yan-Bo Wang
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai-an City 271018, P. R. China
| | - Guang-Zhong Jiao
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai-an City 271018, P. R. China
| | - De-Ling Kong
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai-an City 271018, P. R. China
| | - Qing Li
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai-an City 271018, P. R. China
| | - Hong Li
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai-an City 271018, P. R. China
| | - Liang-Liang Zheng
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai-an City 271018, P. R. China
| | - Jing-He Tan
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai-an City 271018, P. R. China
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Gutnisky C, Dalvit GC, Thompson JG, Cetica PD. Pentose phosphate pathway activity: effect on in vitro maturation and oxidative status of bovine oocytes. Reprod Fertil Dev 2015; 26:931-42. [PMID: 23859479 DOI: 10.1071/rd12397] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2012] [Accepted: 06/11/2013] [Indexed: 11/23/2022] Open
Abstract
The relationship between pentose phosphate pathway (PPP) activity in cumulus-oocyte complexes (COCs) and oxidative and mitochondrial activity in bovine oocytes was evaluated with the aim of analysing the impact of two inhibitors (NADPH and 6-aminonicotinamide (6-AN)) and a stimulator (NADP) of the key enzymes of the PPP on the maturation rate, oxidative and mitochondrial activity and the mitochondrial distribution in oocytes. The proportion of COCs with measurable PPP activity (assessed using brilliant cresyl blue staining), glucose uptake, lactate production and meiotic maturation rate diminished when 6-AN (0.1, 1, 5 and 10mM for 22h) was added to the maturation medium (P<0.05). The addition of NADPH did not modify glucose uptake or lactate production, but reduced PPP activity in COCs and meiotic maturation rates (P<0.05). The presence of NADP (0.0125, 0.125, 1.25 and 12.5mM for 22h of culture) in the maturation medium had no effect on PPP activity in COCs, glucose uptake, lactate production and meiotic maturation rate. However, in the absence of gonadotropin supplementation, NADP stimulated both glucose uptake and lactate production at 12.5mM (the highest concentration tested; P<0.05). NADP did not modify cleavage rate, but decreased blastocyst production (P<0.05). During IVM, oocyte oxidative and mitochondrial activity was observed to increase at 15 and 22h maturation, which was also related to progressive mitochondrial migration. Inhibiting the PPP with 6-AN or NADPH led to reduced oxidative and mitochondrial activity compared with the respective control groups and inhibition of mitochondrial migration (P<0.05). Stimulation of the PPP with NADP increased oxidative and mitochondrial activity at 9h maturation (P<0.05) and delayed mitochondrial migration. The present study shows the significance of altering PPP activity during bovine oocyte IVM, revealing that there is a link between the activity of the PPP and the oxidative status of the oocyte.
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Affiliation(s)
- Cynthia Gutnisky
- Area of Biochemistry, Institute of Research and Technology on Animal Reproduction, School of Veterinary Sciences, University of Buenos Aires, Chorroarín 280, Buenos Aires C1427CWO, Argentina
| | - Gabriel C Dalvit
- Area of Biochemistry, Institute of Research and Technology on Animal Reproduction, School of Veterinary Sciences, University of Buenos Aires, Chorroarín 280, Buenos Aires C1427CWO, Argentina
| | - Jeremy G Thompson
- Research Centre for Reproductive Health, The Robinson Institute, School of Paediatrics and Reproductive Health, The University of Adelaide, 2nd Floor, Medical School South, Adelaide, SA 5005, Australia
| | - Pablo D Cetica
- Area of Biochemistry, Institute of Research and Technology on Animal Reproduction, School of Veterinary Sciences, University of Buenos Aires, Chorroarín 280, Buenos Aires C1427CWO, Argentina
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37
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Yuan Y, Paczkowski M, Wheeler MB, Krisher RL. Use of a novel polydimethylsiloxane well insert to successfully mature, culture and identify single porcine oocytes and embryos. Reprod Fertil Dev 2015; 26:375-84. [PMID: 23497913 DOI: 10.1071/rd12326] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2012] [Accepted: 02/10/2013] [Indexed: 01/23/2023] Open
Abstract
The objective of this study was to evaluate the efficacy of a novel polydimethylsiloxane (PDMS) well-insert system for oocyte in vitro maturation (IVM) and in vitro embryo culture (IVC) in pigs. The PDMS well inserts, consisting of multiple microwells with connecting microchannels, resulted in equivalent blastocyst development compared with standard microdrop culture for IVC. These PDMS well inserts were then evaluated for IVM or IVC in a rocking versus static environment. The rocking environment during both oocyte IVM and embryo culture had detrimental effects on oocyte and embryo development compared with a static environment. Importantly, blastocyst development of oocytes and embryos cultured in the PDMS well inserts in the static environment was equivalent to that of standard microdrops. Further analysis of transcript abundance in blastocysts produced from these different environments revealed that the PDMS well-insert system may produce more viable embryos. In conclusion, this PDMS well-insert system can successfully mature oocytes and culture embryos in an individually-identifiable manner without compromising, and perhaps enhancing, developmental potential.
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Affiliation(s)
- Ye Yuan
- Department of Animal Sciences, University of Illinois, 1207 West Gregory Drive, Urbana, IL 61801, USA
| | - Melissa Paczkowski
- National Foundation for Fertility Research, 10290 Ridgegate Circle, Lone Tree, CO 80124, USA
| | - Matthew B Wheeler
- Department of Animal Sciences, University of Illinois, 1207 West Gregory Drive, Urbana, IL 61801, USA
| | - Rebecca L Krisher
- Department of Animal Sciences, University of Illinois, 1207 West Gregory Drive, Urbana, IL 61801, USA
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38
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Downs SM. Nutrient pathways regulating the nuclear maturation of mammalian oocytes. Reprod Fertil Dev 2015; 27:572-82. [DOI: 10.1071/rd14343] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Accepted: 01/10/2015] [Indexed: 12/15/2022] Open
Abstract
Oocyte maturation is defined as that phase of development whereby a fully grown oocyte reinitiates meiotic maturation, completes one meiotic division with extrusion of a polar body, then arrests at MII until fertilisation. Completion of maturation depends on many different factors, not the least of which is the proper provision of energy substrates to fuel the process. Interaction of the oocyte and somatic compartment of the follicle is critical and involves numerous signals exchanged between the two cell types in both directions. One of the prominent functions of the cumulus cells is the channelling of metabolites and nutrients to the oocyte to help stimulate germinal vesicle breakdown and direct development to MII. This entails the careful integration and coordination of numerous metabolic pathways, as well as oocyte paracrine signals that direct certain aspects of cumulus cell metabolism. These forces collaborate to produce a mature oocyte that, along with accompanying physiological changes called cytoplasmic maturation, which impart subsequent developmental competence to the oocyte, can be fertilised and develop to term. This review focuses on nuclear maturation and the metabolic interplay that regulates it, with special emphasis on data generated in the mouse.
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39
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Herrick JR. Reversible meiotic arrest in feline oocytes. Reprod Fertil Dev 2014; 26:258-67. [PMID: 23327827 DOI: 10.1071/rd12341] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2012] [Accepted: 11/24/2012] [Indexed: 11/23/2022] Open
Abstract
Increasing intracellular concentrations of cyclic adenosine monophosphate (cAMP) within the cumulus-oocyte complex (COC) inhibits or delays spontaneous oocyte maturation and improves the developmental competence of the oocyte in many species, but information for carnivores is limited. The objectives of the present study were to describe the effects of isobutyl methylxanthine (IBMX), which decreases cAMP degradation, and forskolin, which increases cAMP production, on spontaneous and induced maturation (by equine chorionic gonadotrophin (eCG) and epidermal growth factor (EGF)) of feline oocytes and to evaluate the reversibility of IBMX-induced arrest by measuring the resumption of meiosis and embryonic development following IVF. IBMX decreased (P<0.05) the incidence of spontaneous (6.7% vs 42.0%, metaphase II (MII)) and induced (5.6% vs 66.1% MII) maturation after 24 h of culture. In contrast, forskolin stimulated meiosis (81.7% MII; P<0.05). Following 12 h of culture with IBMX and an additional 24h with eCG and EGF in the absence of IBMX, the proportions of oocytes reaching MII (66.1%), cleaving (79.9%) and developing to the blastocyst stage (15.3%) were similar (P>0.05) to oocytes cultured continuously with eCG and EGF (70.2%, 83.0% and 18.1%, respectively). These results demonstrate that IBMX reversibly inhibits both spontaneous and eCG+EGF-induced meiosis in feline oocytes without compromising the oocyte's developmental competence.
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Affiliation(s)
- Jason R Herrick
- Department of Comparative Biosciences, University of Illinois at Urbana-Champaign, 2001 South Lincoln Avenue, Urbana, IL 61802, USA.Present address: National Foundation for Fertility Research, 10290 RidgeGate Cr, Lone Tree, CO 80124, USA.
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Paczkowski M, Schoolcraft WB, Krisher RL. Fatty acid metabolism during maturation affects glucose uptake and is essential to oocyte competence. Reproduction 2014; 148:429-39. [PMID: 25062802 DOI: 10.1530/rep-14-0015] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Fatty acid β-oxidation (FAO) is essential for oocyte maturation in mice. The objective of this study was to determine the effect of etomoxir (a FAO inhibitor; 100 μM), carnitine (1 mM), and palmitic acid (1 or 100 μM) during maturation on metabolism and gene expression of the oocyte and cumulus cells, and subsequent embryo development in the mouse. Carnitine significantly increased embryo development, while there was a decrease in development following maturation with 100 μM palmitic acid or etomoxir (P<0.05) treatment. Glucose consumption per cumulus-oocyte complex (COC) was decreased after treatment with carnitine and increased following etomoxir treatment (P<0.05). Intracellular oocyte lipid content was decreased after carnitine or etomoxir exposure (P<0.05). Abundance of Slc2a1 (Glut1) was increased after etomoxir treatment in the oocyte and cumulus cells (P<0.05), suggesting stimulation of glucose transport and potentially the glycolytic pathway for energy production when FAO is inhibited. Abundance of carnitine palmitoyltransferase 2 (Cpt2) tended to increase in oocytes (P=0.1) after treatment with 100 μM palmitic acid and in cumulus cells after exposure to 1 μM palmitic acid (P=0.07). Combined with carnitine, 1 μM palmitic acid increased the abundance of Acsl3 (P<0.05) and Cpt2 tended to increase (P=0.07) in cumulus cells, suggesting FAO was increased during maturation in response to stimulators and fatty acids. In conclusion, fatty acid and glucose metabolism are related to the mouse COC, as inhibition of FAO increases glucose consumption. Stimulation of FAO decreases glucose consumption and lipid stores, positively affecting subsequent embryo development, while an overabundance of fatty acid or reduced FAO negatively affects oocyte quality.
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Affiliation(s)
- M Paczkowski
- National Foundation for Fertility Research10290 Ridgegate Circle, Lone Tree, Colorado 80124, USAColorado Center for Reproductive Medicine10290 Ridgegate Circle, Lone Tree, Colorado 80124, USA
| | - W B Schoolcraft
- National Foundation for Fertility Research10290 Ridgegate Circle, Lone Tree, Colorado 80124, USAColorado Center for Reproductive Medicine10290 Ridgegate Circle, Lone Tree, Colorado 80124, USA
| | - R L Krisher
- National Foundation for Fertility Research10290 Ridgegate Circle, Lone Tree, Colorado 80124, USAColorado Center for Reproductive Medicine10290 Ridgegate Circle, Lone Tree, Colorado 80124, USA
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Gutnisky C, Morado S, Dalvit GC, Thompson JG, Cetica PD. Glycolytic pathway activity: effect on IVM and oxidative metabolism of bovine oocytes. Reprod Fertil Dev 2014; 25:1026-35. [PMID: 23098776 DOI: 10.1071/rd12193] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2012] [Accepted: 09/20/2012] [Indexed: 11/23/2022] Open
Abstract
The aim of the present study was to determine the effect of altering glycolytic pathway activity during bovine IVM on the meiotic maturation rate, oxidative activity, mitochondrial activity and the mitochondrial distribution within oocytes. Glycolytic activity was manipulated using two inhibitors (ATP, NaF) and a stimulator (AMP) of key enzymes of the pathway. Inhibition of glucose uptake, lactate production and meiotic maturation rates was observed when media were supplemented with ATP or NaF. The addition of AMP to the maturation medium had no effect on glucose uptake, lactate production or meiotic maturation. In the absence of gonadotrophin supplementation, AMP stimulated both glucose uptake and lactate production. However, AMP also decreased cytoplasmic maturation, as determined by early cleavage. During IVM, oocyte oxidative and mitochondrial activity was observed to increase at 15 and 22h maturation. Inhibiting glycolysis with ATP or NaF led to a reduced oxidative and mitochondrial pattern compared with the respective control groups. Stimulation of the pathway with AMP increased oxidative and mitochondrial activity. A progressive mitochondrial migration to the central area was observed during maturation; oocytes treated with ATP, NaF or AMP showed limited migration. The present study reveals the effects of altering glycolytic pathway activity in cumulus-oocyte complexes, revealing the link between glycolysis of the cumulus-oocyte complex and the oxidative and mitochondrial activity of the oocyte.
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Affiliation(s)
- Cynthia Gutnisky
- Institute of Research and Technology on Animal Reproduction, School of Veterinary Sciences, University of Buenos Aires, Chorroarín 280, Buenos Aires C1427CWO, Argentina.
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Jimenez PT, Frolova AI, Chi MM, Grindler NM, Willcockson AR, Reynolds KA, Zhao Q, Moley KH. DHEA-mediated inhibition of the pentose phosphate pathway alters oocyte lipid metabolism in mice. Endocrinology 2013; 154:4835-44. [PMID: 24036000 PMCID: PMC3836065 DOI: 10.1210/en.2012-2140] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Women with polycystic ovary syndrome (PCOS) and hyperandrogenism have altered hormone levels and suffer from ovarian dysfunction leading to subfertility. We have attempted to generate a model of hyperandrogenism by feeding mice chow supplemented with dehydroepiandrosterone (DHEA), an androgen precursor that is often elevated in women with PCOS. Treated mice had polycystic ovaries, low ovulation rates, disrupted estrous cycles, and altered hormone levels. Because DHEA is an inhibitor of glucose-6-phosphate dehydrogenase, the rate-limiting enzyme in the pentose phosphate pathway, we tested the hypothesis that oocytes from DHEA-exposed mice would have metabolic disruptions. Citrate levels, glucose-6-phosphate dehydrogenase activity, and lipid content in denuded oocytes from these mice were significantly lower than controls, suggesting abnormal tricarboxylic acid and pentose phosphate pathway metabolism. The lipid and citrate effects were reversible by supplementation with nicotinic acid, a precursor for reduced nicotinamide adenine dinucleotide phosphate. These findings suggest that elevations in systemic DHEA can have a negative impact on oocyte metabolism and may contribute to poor pregnancy outcomes in women with hyperandrogenism and PCOS.
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Affiliation(s)
- Patricia T Jimenez
- 425 South Euclid Avenue, BJC Institute of Health, Box 8064, St Louis, MO 63110.
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43
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Abstract
The oocyte is at the center of the equation that results in female fertility. Many factors influence oocyte quality, including external factors such as maternal nutrition, stress, and environmental exposures, as well as ovarian factors such as steroids, intercellular communication, antral follicle count, and follicular fluid composition. These influences are interconnected; changes in the external environment of the female translate into ovarian changes that affect the oocyte. The lengthy period during which the oocyte remains arrested in the ovary provides ample time and opportunity for environmental factors to take their toll. An appropriate environment for growth and maturation of the oocyte, in vivo and in vitro, is critical to ensure optimal oocyte quality, which determines the success of fertilization and preimplantation embryo development, and has long-term implications for implantation, fetal growth, and offspring health.
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Affiliation(s)
- Rebecca L Krisher
- National Foundation for Fertility Research, Lone Tree, Colorado 80124;
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Alvarez GM, Ferretti EL, Gutnisky C, Dalvit GC, Cetica PD. Modulation of glycolysis and the pentose phosphate pathway influences porcine oocyte in vitro maturation. Reprod Domest Anim 2012. [PMID: 23189959 DOI: 10.1111/rda.12123] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Glycolytic and pentose phosphate pathway (PPP) activities were modulated in porcine cumulus-oocyte complexes (COCs) during in vitro maturation (IVM) by the addition of inhibitors or stimulators of key enzymes of the pathways to elucidate their relative participation in oocyte maturation. The activities of glycolysis and PPP were evaluated by lactate production per COC and by the brilliant cresyl blue test, respectively. Glucose uptake per COC and the oocyte maturation rate were also evaluated. Lactate production, glucose uptake and the percentage of oocytes reaching metaphase II decreased in a dose-dependent manner in the presence of the pharmacological (NaF) or the physiological (ATP) inhibitors of glycolysis (p < 0.05). The addition of the physiological stimulator of glycolysis (AMP) caused no effect on lactate production, glucose uptake or the meiotic maturation rate. The pharmacological (6-AN) and the physiological (NADPH) inhibitors of PPP induced a dose-dependent decrease in the percentage of oocytes with high PPP activity and in the nuclear maturation rate (p < 0.05). The physiological stimulator of PPP (NADP) caused no effect on the percentage of oocytes with high PPP activity. The glycolytic and PPP activities of porcine COCs and maturational competence of oocytes seem to be closely related events. This study shows for the first time the regulatory effect of ATP and NADPH as physiological inhibitors of glycolysis and PPP in porcine COCs, respectively. Besides, these pathways seem to reach their maximum activities in porcine COCs during IVM because no further increases were achieved by the presence of AMP or NADP.
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Affiliation(s)
- G M Alvarez
- INITRA (Institute of Research and Technology in Animal Reproduction), Area of Biochemistry, School of Veterinary Sciences, University of Buenos Aires, Buenos Aires, Argentina.
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Yuan Y, Wheeler MB, Krisher RL. Disrupted redox homeostasis and aberrant redox gene expression in porcine oocytes contribute to decreased developmental competence. Biol Reprod 2012; 87:78. [PMID: 22811572 DOI: 10.1095/biolreprod.112.099952] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
The objective of this study was to identify specific redox-related genes whose function contributes to oocyte quality and to characterize the role of redox homeostasis in oocyte development. We determined the redox genes glutaredoxin 2 (GLRX2), protein disulfide isomerase family A, members 4 and 6 (PDIA4, PDIA6), and thioredoxin reductase 1 (TXNRD1) were differentially expressed between adult (more competent) and prepubertal (less competent) porcine in vitro-matured (IVM) oocytes. The association between these genes and oocyte quality was further validated by comparing transcript abundance in IVM with that in in vivo-matured (VVM) prepubertal and adult oocytes. By maturing oocytes in variable redox environments, we demonstrated that a balanced redox environment is important for oocyte quality, and over-reduction of the environment is as detrimental as excess oxidation. Critical levels of reactive oxygen species (ROS) and glutathione (GSH) are required for oocyte competence. Elevated GSH and lower ROS in prepubertal oocytes suggest disrupted redox homeostasis exists in these cells. By further comparing GLRX2, PDIA4, PDIA6, and TXNRD1 expression levels in oocytes matured under these different redox environments, we found aberrant expression patterns in prepubertal oocytes but not in adult oocytes when the maturation medium contained high concentrations of antioxidants. These results suggest that prepubertal oocytes are less competent in regulating redox balance than adult oocytes, contributing to lower oocyte quality. In conclusion, aberrant redox gene expression patterns and disrupted redox homeostasis contribute to decreased developmental competence in prepubertal and IVM porcine oocytes. The balance between ROS and GSH plays an important role in oocyte quality.
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Affiliation(s)
- Ye Yuan
- Department of Animal Sciences, University of Illinois, Urbana, USA.
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46
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Kim Y, Kim EY, Seo YM, Yoon TK, Lee WS, Lee KA. Function of the pentose phosphate pathway and its key enzyme, transketolase, in the regulation of the meiotic cell cycle in oocytes. Clin Exp Reprod Med 2012; 39:58-67. [PMID: 22816071 PMCID: PMC3398118 DOI: 10.5653/cerm.2012.39.2.58] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2012] [Revised: 06/11/2012] [Accepted: 06/16/2012] [Indexed: 11/25/2022] Open
Abstract
Objective Previously, we identified that transketolase (Tkt), an important enzyme in the pentose phosphate pathway, is highly expressed at 2 hours of spontaneous maturation in oocytes. Therefore, this study was performed to determine the function of Tkt in meiotic cell cycle regulation, especially at the point of germinal vesicle breakdown (GVBD). Methods We evaluated the loss-of-function of Tkt by microinjecting Tkt double-stranded RNAs (dsRNAs) into germinal vesicle-stage oocytes, and the oocytes were cultured in vitro to evaluate phenotypic changes during oocyte maturation. In addition to maturation rates, meiotic spindle and chromosome rearrangements, and changes in expression of other enzymes in the pentose phosphate pathway were determined after Tkt RNA interference (RNAi). Results Despite the complete and specific knockdown of Tkt expression, GVBD occurred and meiosis was arrested at the metaphase I (MI) stage. The arrested oocytes exhibited spindle loss, chromosomal aggregation, and declined maturation promoting factor and mitogen-activated protein kinase activities. The modified expression of two enzymes in the pentose phosphate pathway, Prps1 and Rbks, after Tkt RNAi and decreased maturation rates were amended when ribose-5-phosphate was supplemented in the culture medium, suggesting that the Tkt and pentose phosphate pathway are important for the maturation process. Conclusion We concluded that Tkt and its associated pentose phosphate pathway play an important role in the MI-MII transition of the oocytes' meiotic cell cycle, but not in the process of GVBD.
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Affiliation(s)
- Yunna Kim
- Department of Biomedical Science, College of Life Science, CHA University, Seoul, Korea
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47
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Abstract
Glucose is an essential nutrient for mammalian cells. Emerging evidence suggests that glucose within the oocyte regulates meiotic maturation. However, it remains controversial as to whether, and if so how, glucose enters oocytes within cumulus-oocyte complexes (COCs). We used a fluorescent glucose derivative (6-NBDG) to trace glucose transport within live mouse COCs and employed inhibitors of glucose transporters (GLUTs) and gap junction proteins to examine their distinct roles in glucose uptake by cumulus cells and the oocyte. We showed that fluorescent glucose enters both cumulus-enclosed and denuded oocytes. Treating COCs with GLUT inhibitors leads to simultaneous decreases in glucose uptake in cumulus cells and the surrounded oocyte but no effect on denuded oocytes. Pharmacological blockade of of gap junctions between the oocyte and cumulus cells significantly inhibited fluorescent glucose transport to oocytes. Moreover, we find that both in vivo hyperglycemic environment and in vitro high-glucose culture increase free glucose levels in oocytes via gap junctional channels. These findings reveal an intercellular pathway for glucose transport into oocytes: glucose is taken up by cumulus cells via the GLUT system and then transferred into the oocyte through gap junctions. This intercellular pathway may partly mediate the effects of high-glucose condition on oocyte quality.
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Affiliation(s)
- Qiang Wang
- State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing, China
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48
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Silva E, Paczkowski M, Krisher RL. The effect of leptin on maturing porcine oocytes is dependent on glucose concentration. Mol Reprod Dev 2012; 79:296-307. [PMID: 22368147 DOI: 10.1002/mrd.22029] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2011] [Accepted: 01/27/2012] [Indexed: 12/23/2022]
Abstract
Increased body weight is often accompanied by increased circulating levels of leptin and glucose, which alters glucose metabolism in various tissues, including perhaps the oocyte. Alteration of glucose metabolism impacts oocyte function and may contribute to the subfertility often associated with obese individuals. The objective of this study was to determine the effect of leptin (0, 10, and 100 ng/ml) on the oocyte and cumulus cells during in vitro maturation under differing glucose concentrations. We examined the effects of leptin on oocyte maturation, blastocyst development, and/or gene expression in oocytes and cumulus cells (IRS1, IGF1, PPARγ, IL6, GLUT1) in a physiological glucose (2 mM) and high glucose (50 mM) environment. We also evaluated the effect of leptin on glucose metabolism via glycolysis and the pentose phosphate pathway. In a physiological glucose environment, leptin did not have an influence on oocyte maturation, blastocyst development, or oocyte gene expression. Expression of GLUT1 in cumulus cells was downregulated with 100 ng/ml leptin treatment, but did not affect oocyte glucose metabolism. In a high glucose environment, oocyte maturation and glycolysis were decreased, but in the presence of 100 ng/ml leptin, these parameters were improved to levels similar to control. This effect is potentially mediated by an upregulation of oocyte IRS1 and a correction of cumulus cell IGF1 expression. The present study demonstrates that in a physiological glucose concentration, leptin plays a negligible role in oocyte function. However, leptin appears to modulate the deleterious impact of a high glucose environment on oocyte function.
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Affiliation(s)
- Elena Silva
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
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49
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Han Y, Yan J, Zhou J, Teng Z, Bian F, Guo M, Mao G, Li J, Wang J, Zhang M, Xia G. Acute fasting decreases the expression of GLUT1 and glucose utilisation involved in mouse oocyte maturation and cumulus cell expansion. Reprod Fertil Dev 2012; 24:733-42. [DOI: 10.1071/rd10301] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2010] [Accepted: 07/20/2011] [Indexed: 01/13/2023] Open
Abstract
Acute fasting impairs meiotic resumption and glucose consumption in mouse cumulus cell and oocyte complexes (COCs). This study examines the effects of acute fasting on the regulation of glucose transporter 1 (GLUT1) expression and glucose consumption in oocyte maturation. Our results indicate that the restriction of glucose utilisation by 2-deoxyglucose (2-DG) mimicked the inhibitory effects of acute fasting on oocyte meiotic resumption and cumulus cell expansion, effects that were rescued by high glucose concentrations in the culture medium. GLUT1 protein levels were higher in cumulus cells compared with oocytes, and GLUT1 expression in COCs increased with FSH treatment in vitro. However, under acute fasting conditions, GLUT1 expression in COCs decreased and the response to FSH disappeared. Exposure to high glucose conditions (27.5 mM and 55 mM), significantly increased both glucose consumption and GLUT1 levels in COCs. Inhibition of GLUT1 function using an anti-GLUT1 antibody significantly inhibited FSH-induced oocyte meiotic resumption. Taken together, these results suggest that acute fasting decreases GLUT1 expression and glucose utilisation, inhibiting the processes of oocyte maturation and cumulus cell expansion.
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50
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Abstract
Oocyte maturation is a critical component of in vitro embryo production. If not carried out in a precise manner under optimal conditions, subsequent fertilization and embryo development will be compromised. Here, we describe collection and in vitro maturation procedures in swine that maintain oocyte competence, resulting in successful embryo development following fertilization. These procedures can be used both for basic research purposes and large-scale production of mature oocytes for use in subsequent assisted reproductive technologies.
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Affiliation(s)
- Ye Yuan
- University of Missouri, Columbia, MO, USA
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