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Zhou Z, Wu Z, Zhang L, Dai Y, Shao G, Ren C, Huang P. Mitophagy in mammalian follicle development and health. Reprod Biol 2024; 24:100889. [PMID: 38733657 DOI: 10.1016/j.repbio.2024.100889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 04/22/2024] [Accepted: 04/24/2024] [Indexed: 05/13/2024]
Abstract
Mitophagy, the cellular process that removes damaged mitochondria, plays a crucial role in maintaining normal cell functions. It is deeply involved in the entire process of follicle development and is associated with various ovarian diseases. This review aims to provide a comprehensive overview of mitophagy regulation, emphasizing its role at different stages of follicular development. Additionally, the study illuminates the relationship between mitophagy and ovarian diseases, including ovary aging (OA), primary ovarian insufficiency (POI), and polycystic ovary syndrome (PCOS). A detailed understanding of mitophagy could reveal valuable insights and novel strategies for managing female ovarian reproductive health.
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Affiliation(s)
- Zhengrong Zhou
- School of Medicine, Jiangsu University, Zhenjiang 212013, PR China
| | - Zhipeng Wu
- School of Medicine, Jiangsu University, Zhenjiang 212013, PR China
| | - Liufang Zhang
- School of Medicine, Jiangsu University, Zhenjiang 212013, PR China
| | - Yue Dai
- School of Medicine, Jiangsu University, Zhenjiang 212013, PR China
| | - Genbao Shao
- School of Medicine, Jiangsu University, Zhenjiang 212013, PR China
| | - Caifang Ren
- School of Medicine, Jiangsu University, Zhenjiang 212013, PR China
| | - Pan Huang
- School of Medicine, Jiangsu University, Zhenjiang 212013, PR China.
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Biswas S, Ghosh S, Maitra S. Role of insulin-like growth factor 1 (IGF1) in the regulation of mitochondrial bioenergetics in zebrafish oocytes: lessons from in vivo and in vitro investigations. Front Cell Dev Biol 2023; 11:1202693. [PMID: 37457295 PMCID: PMC10347385 DOI: 10.3389/fcell.2023.1202693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2023] [Accepted: 06/06/2023] [Indexed: 07/18/2023] Open
Abstract
Optimal mitochondrial functioning is indispensable for acquiring oocyte competence and meiotic maturation, whilst mitochondrial dysfunction may lead to diminished reproductive potential and impaired fertility. The role of the intra-ovarian IGF system in ovarian follicular dynamics has been implicated earlier. Although several studies have demonstrated the role of the IGF axis in facilitating mitochondrial function over a multitude of cell lines, its role in oocyte energy metabolism remains largely unexplored. Here using zebrafish, the relative importance of IGF1 in modulating oocyte mitochondrial bioenergetics has been investigated. A dramatic increase in ovarian lhcgr and igf1 expression accompanied heightened ATP levels and mitochondrial polarization in full-grown (FG) oocytes resuming meiotic maturation and ovulation in vivo. Concomitant with elevated igf1 expression and IGF1R phosphorylation, hCG (LH analog) stimulation of FG follicles in vitro prompted a sharp increase in NRF-1 and ATP levels, suggesting a positive influence of gonadotropin action on igf1 expression vis-à-vis oocyte bioenergetics. While recombinant IGF1 administration enhanced mitochondrial function, IGF1R immunodepletion or priming with PI3K inhibitor wortmannin could abrogate NRF-1 immunoreactivity, expression of respiratory chain subunits, ΔΨM, and ATP content. Mechanistically, activation of PI3K/Akt signaling in IGF1-treated follicles corroborated well with the rapid phosphorylation of GSK3β at Ser9 (inactive) followed by PGC-1β accumulation. While selective inhibition of GSK3β promoted PGC-1β, Akt inhibition could abrogate IGF1-induced p-GSK3β (Ser9) and PGC-1β immunoreactive protein indicating Akt-mediated GSK3β inactivation and PGC-1β stabilization. The IGF1-depleted follicles showed elevated superoxide anions, subdued steroidogenic potential, and attenuated G2-M1 transition. In summary, this study highlights the importance of IGF1 signaling in oocyte bioenergetics prior to resumption of meiosis.
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Wan B, Huang L, Jing C, Li Y, Jiao N, Liang M, Jiang S, Yang W. Zearalenone promotes follicle development through activating the SIRT1/PGC-1α signaling pathway in the ovaries of weaned gilts. J Anim Sci 2022; 100:6537148. [PMID: 35213700 PMCID: PMC9030242 DOI: 10.1093/jas/skac058] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Accepted: 02/24/2022] [Indexed: 11/12/2022] Open
Abstract
This study aimed to investigate the effect of zearalenone (ZEA) exposure on follicular development in weaned gilts, and its mechanism based on the silent information regulator 1 (SIRT1)/peroxisome proliferator-activated receptor-γ co-activator 1α (PGC-1α) signaling pathway. A total of 32 healthy female weaned piglets (Landrace × Yorkshire × Duroc) with an average body weight of 12.39 ± 0.24 kg were randomly allotted to a basal diet supplemented with 0, 0.15, 1.5, or 3.0 mg/kg ZEA for a 32-d feeding test. Blood and ovarian samples were obtained at the end of the experiment to determine serum toxin concentrations, ovarian histology, and the expressions of proliferating cell nuclear antigen (PCNA) and SIRT1/PGC-1α signaling pathway-related genes. Results showed that the vulva area, serum concentrations of ZEA, α-zearalenol and β-zearalenol, the thickness of the growing follicular layer, and the diameter of the largest growing follicles, as well as the expressions of SIRT1, PGC-1α, estrogen-related receptor α (ERRα), ATP synthase subunit beta (ATP5B), and PCNA, increased linearly (P < 0.05) with increasing dietary ZEA, whereas the thickness of the primordial follicle layer decreased linearly (P < 0.05). Immunohistochemical analysis showed that the immunoreactive substances of SIRT1 and PGC-1α in the ovaries enhanced with the increasing dietary ZEA (P < 0.05). In addition, the thickness of the growing follicular layer and the diameter of the largest growing follicle were positively correlated with relative mRNA and protein expressions of SIRT1, PGC-1α, ERRα, ATP5B, and PCNA (P < 0.05). However, the thickness of the primordial follicle layer was negatively correlated with the mRNA and protein expression of SIRT1, PGC-1α, ERRα, ATP5B, and PCNA (P < 0.05). Interestingly, the 1.5 mg/kg ZEA treatment had highly hyperplastic follicles, whereas 3.0 mg/kg ZEA resulted in a large number of follicular atresia, which indicated that low-dose ZEA exposure accelerated follicular proliferation, while high-dose ZEA promoted follicular atresia, although the critical value interval needs further confirmation. Results provide a theoretical basis for finding the therapeutic target of ZEA-induced reproductive disorders in weaned gilts.
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Affiliation(s)
- Boyang Wan
- Department of Animal Sciences and Technology and Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, Taian, Shandong 271018, China
| | - Libo Huang
- Department of Animal Sciences and Technology and Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, Taian, Shandong 271018, China
| | - Changwei Jing
- Technical Department, Shandong Chinwhiz Co., Weifang, Shandong 262400, China
| | - Yang Li
- Department of Animal Sciences and Technology and Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, Taian, Shandong 271018, China
| | - Ning Jiao
- Department of Animal Sciences and Technology and Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, Taian, Shandong 271018, China
| | - Ming Liang
- Department of Feeding Microecology, Shandong Baolaililai Bioengineering Co., Ltd., Taian, Shandong 271001, China
| | - Shuzhen Jiang
- Department of Animal Sciences and Technology and Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, Taian, Shandong 271018, China
| | - Weiren Yang
- Department of Animal Sciences and Technology and Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, Taian, Shandong 271018, China,Corresponding author:
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Tremblay PG, Fortin C, Sirard MA. Gene cascade analysis in human granulosa tumor cells (KGN) following exposure to high levels of free fatty acids and insulin. J Ovarian Res 2021; 14:178. [PMID: 34930403 PMCID: PMC8690403 DOI: 10.1186/s13048-021-00934-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Accepted: 12/08/2021] [Indexed: 12/21/2022] Open
Abstract
Maternal metabolic disorders such as obesity and diabetes are detrimental factors that compromise fertility and the success rates of medically assisted procreation procedures. During metabolic stress, adipose tissue is more likely to release free fatty acids (FFA) in the serum resulting in an increase of FFA levels not only in blood, but also in follicular fluid (FF). In humans, high concentrations of palmitic acid and stearic acid reduced granulosa cell survival and were associated with poor cumulus-oocyte complex (COC) morphology. Obesity and high levels of circulating FFA were also causatively linked to hampered insulin sensitivity in cells and compensatory hyperinsulinemia. To provide a global picture of the principal upstream signaling pathways and genomic mechanisms involved in this metabolic context, human granulosa-like tumor cells (KGN) were treated with a combination of palmitic acid, oleic acid, and stearic acid at the higher physiological concentrations found in the follicular fluid of women with a higher body mass index (BMI) (≥ 30.0 kg/m2). We also tested a high concentration of insulin alone and in combination with high concentrations of fatty acids. Transcription analysis by RNA-seq with a cut off for fold change of 1.5 and p-value 0.05 resulted in thousands of differentially expressed genes for each treatment. Using analysis software such as Ingenuity Pathway Analysis (IPA), we were able to establish that high concentrations of FFA affected the expression of genes mainly related to glucose and insulin homoeostasis, fatty acid metabolism, as well as steroidogenesis and granulosa cell differentiation processes. The combination of insulin and high concentrations of FFA affected signaling pathways related to apoptosis, inflammation, and oxidative stress. Taken together, our results provided new information on the mechanisms that might be involved in human granulosa cells exposed to high concentrations of FFA and insulin in the contexts of metabolism disorders.
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Affiliation(s)
- Patricia G Tremblay
- Centre de Recherche en Reproduction, Développement et Santé Intergénérationnelle, Faculté des Sciences de l'Agriculture et de l'Alimentation, Département des Sciences Animales, Université Laval, Québec, QC, G1V 0A6, Canada
| | - Chloé Fortin
- Centre de Recherche en Reproduction, Développement et Santé Intergénérationnelle, Faculté des Sciences de l'Agriculture et de l'Alimentation, Département des Sciences Animales, Université Laval, Québec, QC, G1V 0A6, Canada
| | - Marc-André Sirard
- Centre de Recherche en Reproduction, Développement et Santé Intergénérationnelle, Faculté des Sciences de l'Agriculture et de l'Alimentation, Département des Sciences Animales, Université Laval, Québec, QC, G1V 0A6, Canada.
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Huang P, Zhou Y, Tang W, Ren C, Jiang A, Wang X, Qian X, Zhou Z, Gong A. Long-term treatment of Nicotinamide mononucleotide improved age-related diminished ovary reserve through enhancing the mitophagy level of granulosa cells in mice. J Nutr Biochem 2021; 101:108911. [PMID: 34801690 DOI: 10.1016/j.jnutbio.2021.108911] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 09/25/2021] [Accepted: 10/22/2021] [Indexed: 12/17/2022]
Abstract
Ovarian aging affects the reproductive health of elderly women due to decline in oocyte quality, which is closely related to mitochondrial dysfunction. Nicotinamide mononucleotide (NMN), as a precursor of NAD+, effectively regulate mitochondria metabolism in mice. However, roles of NMN in improving age-related diminished ovary reserve remain to be determined. In present study, 4, 8, 12, 24, 40-week old female ICR mice were collected and a 20-week-long administration of NMN was conducted to 40-week-old mice (60WN), meanwhile the control group is given water (60WC). First, we found that 20-week-long administration of NMN to 40-week-old mice exhibited anti-aging and anti-inflammatory effects on organ structures, along with the improvement of estrus cycle condition and endocrine function. The number of primordial, primary, secondary, antral follicles and corpora luteum of ovaries in 60WN group was significantly increased compared with those in 60WC group. Additionally, the protein and gene expressions of P16 of ovaries were significantly reduced in 60WN group than in 60WC group. the mitochondria biogenesis, autophagy level, and proteases activity enhanced in granulosa cells after 20-week-administration of NMN. Present results indicate that NMN has the potential to save diminished ovary reserve by long-term treatment, providing a basis for exploring the role of NMN in anti-ovarian aging by enhancing the mitophagy level of granulosa cells.
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Affiliation(s)
- Pan Huang
- School of Medicine, Jiangsu University, Zhenjiang, Jiangsu Province, China
| | - Yan Zhou
- School of Medicine, Jiangsu University, Zhenjiang, Jiangsu Province, China
| | - Weihong Tang
- School of Medicine, Jiangsu University, Zhenjiang, Jiangsu Province, China
| | - Caifang Ren
- School of Medicine, Jiangsu University, Zhenjiang, Jiangsu Province, China
| | - Anqi Jiang
- School of Medicine, Jiangsu University, Zhenjiang, Jiangsu Province, China
| | - Xuxin Wang
- School of Medicine, Jiangsu University, Zhenjiang, Jiangsu Province, China
| | - Xin Qian
- School of Medicine, Jiangsu University, Zhenjiang, Jiangsu Province, China
| | - Zhengrong Zhou
- School of Medicine, Jiangsu University, Zhenjiang, Jiangsu Province, China.
| | - Aihua Gong
- School of Medicine, Jiangsu University, Zhenjiang, Jiangsu Province, China.
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Li CJ, Lin LT, Tsai HW, Chern CU, Wen ZH, Wang PH, Tsui KH. The Molecular Regulation in the Pathophysiology in Ovarian Aging. Aging Dis 2021; 12:934-949. [PMID: 34094652 PMCID: PMC8139203 DOI: 10.14336/ad.2020.1113] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 11/13/2020] [Indexed: 12/23/2022] Open
Abstract
The female reproductive system is of great significance to women’s health. Aging of the female reproductive system occurs approximately 10 years prior to the natural age-associated functional decline of other organ systems. With an increase in life expectancy worldwide, reproductive aging has gradually become a key health issue among women. Therefore, an adequate understanding of the causes and molecular mechanisms of ovarian aging is essential towards the inhibition of age-related diseases and the promotion of health and longevity in women. In general, women begin to experience a decline in ovarian function around the age of 35 years, which is mainly manifested as a decrease in the number of ovarian follicles and the quality of oocytes. Studies have revealed the occurrence of mitochondrial dysfunction, reduced DNA repair, epigenetic changes, and metabolic alterations in the cells within the ovaries as age increases. In the present work, we reviewed the possible factors of aging-induced ovarian insufficiency based on its clinical diagnosis and performed an in-depth investigation of the relevant molecular mechanisms and potential targets to provide novel approaches for the effective improvement of ovarian function in older women.
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Affiliation(s)
- Chia-Jung Li
- 1Department of Obstetrics and Gynaecology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan.,2Institute of BioPharmaceutical sciences, National Sun Yat-sen University, Kaohsiung, Taiwan
| | - Li-Te Lin
- 1Department of Obstetrics and Gynaecology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan.,2Institute of BioPharmaceutical sciences, National Sun Yat-sen University, Kaohsiung, Taiwan.,3Department of Obstetrics and Gynaecology, National Yang-Ming University School of Medicine, Taipei, Taiwan
| | - Hsiao-Wen Tsai
- 1Department of Obstetrics and Gynaecology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan.,2Institute of BioPharmaceutical sciences, National Sun Yat-sen University, Kaohsiung, Taiwan
| | - Chyi-Uei Chern
- 1Department of Obstetrics and Gynaecology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
| | - Zhi-Hong Wen
- 4Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung, Taiwan
| | - Peng-Hui Wang
- 3Department of Obstetrics and Gynaecology, National Yang-Ming University School of Medicine, Taipei, Taiwan.,5Department of Obstetrics and Gynecology, Taipei Veterans General Hospital, Taipei, Taiwan.,6Department of Medical Research, China Medical University Hospital, Taichung, Taiwan.,7Female Cancer Foundation, Taipei, Taiwan
| | - Kuan-Hao Tsui
- 1Department of Obstetrics and Gynaecology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan.,2Institute of BioPharmaceutical sciences, National Sun Yat-sen University, Kaohsiung, Taiwan.,3Department of Obstetrics and Gynaecology, National Yang-Ming University School of Medicine, Taipei, Taiwan.,8Department of Pharmacy and Master Program, College of Pharmacy and Health Care, Tajen University, Pingtung County, Taiwan
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Guo Y, Nie H, Sun L, Zhang G, Deng K, Fan Y, Wang F. Effects of diet and arginine treatment during the luteal phase on ovarian NO/PGC-1α signaling in ewes. Theriogenology 2017; 96:76-84. [DOI: 10.1016/j.theriogenology.2017.03.028] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2016] [Revised: 03/27/2017] [Accepted: 03/27/2017] [Indexed: 01/05/2023]
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Huang J, Jiao J, Tan ZL, He Z, Beauchemin KA, Forster R, Han XF, Tang SX, Kang J, Zhou C. Inferring the Skeletal Muscle Developmental Changes of Grazing and Barn-Fed Goats from Gene Expression Data. J Agric Food Chem 2016; 64:6791-6800. [PMID: 27561543 DOI: 10.1021/acs.jafc.6b02708] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Thirty-six Xiangdong black goats were used to investigate age-related mRNA and protein expression levels of some genes related to skeletal muscle structural proteins, MRFs and MEF2 family, and skeletal muscle fiber type and composition during skeletal muscle growth under grazing (G) and barn-fed (BF) feeding systems. Goats were slaughtered at six time points selected to reflect developmental changes of skeletal muscle during nonrumination (days 0, 7, and 14), transition (day 42), and rumination phases (days 56 and 70). It was observed that the number of type IIx in the longissimus dorsi was increased quickly while numbers of type IIa and IIb decreased slightly, indicating that these genes were coordinated during the rapid growth and development stages of skeletal muscle. No gene expression was affected (P > 0.05) by feeding system except Myf5 and Myf6. Protein expressions of MYOZ3 and MEF2C were affected (P < 0.05) by age, whereas PGC-1α was linearly decreased in the G group, and only MYOZ3 protein was affected (P < 0.001) by feeding system. Moreover, it was found that PGC-1α and MEF2C proteins may interact with each other in promoting muscle growth. The current results indicate that (1) skeletal muscle growth during days 0-70 after birth is mainly myofiber hypertrophy and differentiation, (2) weaning affects the expression of relevant genes of skeletal muscle structural proteins, skeletal muscle growth, and skeletal muscle fiber type and composition, and (3) nutrition or feeding regimen mainly influences the expression of skeletal muscle growth genes.
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Affiliation(s)
- Jinyu Huang
- Key Laboratory for Agro-Ecological Processes in Subtropical Region, Hunan Research Center of Livestock & Poultry Sciences, South-Central Experimental Station of Animal Nutrition and Feed Science in Ministry of Agriculture, Institute of Subtropical Agriculture, The Chinese Academy of Sciences , Changsha, Hunan 410125, People's Republic of China
- University of the Chinese Academy of Sciences , Beijing 100049, People's Republic of China
| | - Jinzhen Jiao
- Key Laboratory for Agro-Ecological Processes in Subtropical Region, Hunan Research Center of Livestock & Poultry Sciences, South-Central Experimental Station of Animal Nutrition and Feed Science in Ministry of Agriculture, Institute of Subtropical Agriculture, The Chinese Academy of Sciences , Changsha, Hunan 410125, People's Republic of China
| | - Zhi-Liang Tan
- Key Laboratory for Agro-Ecological Processes in Subtropical Region, Hunan Research Center of Livestock & Poultry Sciences, South-Central Experimental Station of Animal Nutrition and Feed Science in Ministry of Agriculture, Institute of Subtropical Agriculture, The Chinese Academy of Sciences , Changsha, Hunan 410125, People's Republic of China
| | - Zhixiong He
- Key Laboratory for Agro-Ecological Processes in Subtropical Region, Hunan Research Center of Livestock & Poultry Sciences, South-Central Experimental Station of Animal Nutrition and Feed Science in Ministry of Agriculture, Institute of Subtropical Agriculture, The Chinese Academy of Sciences , Changsha, Hunan 410125, People's Republic of China
| | - Karen A Beauchemin
- Lethbridge Research Centre, Agriculture and Agri-Food Canada , Lethbridge, Alberta, Canada T1J 4B1
| | - Robert Forster
- Lethbridge Research Centre, Agriculture and Agri-Food Canada , Lethbridge, Alberta, Canada T1J 4B1
| | - Xue-Feng Han
- Key Laboratory for Agro-Ecological Processes in Subtropical Region, Hunan Research Center of Livestock & Poultry Sciences, South-Central Experimental Station of Animal Nutrition and Feed Science in Ministry of Agriculture, Institute of Subtropical Agriculture, The Chinese Academy of Sciences , Changsha, Hunan 410125, People's Republic of China
| | - Shao-Xun Tang
- Key Laboratory for Agro-Ecological Processes in Subtropical Region, Hunan Research Center of Livestock & Poultry Sciences, South-Central Experimental Station of Animal Nutrition and Feed Science in Ministry of Agriculture, Institute of Subtropical Agriculture, The Chinese Academy of Sciences , Changsha, Hunan 410125, People's Republic of China
| | - Jinghe Kang
- Key Laboratory for Agro-Ecological Processes in Subtropical Region, Hunan Research Center of Livestock & Poultry Sciences, South-Central Experimental Station of Animal Nutrition and Feed Science in Ministry of Agriculture, Institute of Subtropical Agriculture, The Chinese Academy of Sciences , Changsha, Hunan 410125, People's Republic of China
| | - Chuanshe Zhou
- Key Laboratory for Agro-Ecological Processes in Subtropical Region, Hunan Research Center of Livestock & Poultry Sciences, South-Central Experimental Station of Animal Nutrition and Feed Science in Ministry of Agriculture, Institute of Subtropical Agriculture, The Chinese Academy of Sciences , Changsha, Hunan 410125, People's Republic of China
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Zhou Z, Jia RX, Zhang G, Wan Y, Zhang Y, Fan Y, Wang Z, Huang P, Wang F. Using cysteine/cystine to overcome oxidative stress in goat oocytes and embryos cultured in vitro. Mol Med Rep 2016; 14:1219-26. [PMID: 27315595 DOI: 10.3892/mmr.2016.5395] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Accepted: 02/19/2016] [Indexed: 11/06/2022] Open
Abstract
Assisted reproductive techniques expose gametes to excessive concentrations of reactive oxygen species. The present study aimed to evaluate the effects of oxidative stress on apoptosis in goat oocytes and embryonic development. The results demonstrated that the addition of 100 µM hydrogen peroxide (H2O2) into media produces an oxidative environment during oocyte maturation. The number of cumulus cells positive for terminal deoxynucleotidyl transferase UTP nick end labeling, and the activity of caspase 3 in mature oocytes were increased, compared with the control group (P<0.05). In addition, the expression levels of mitochondrial regulators, including peroxisome proliferator‑activated receptor γ coactivator-1 α (PGC-1α) and nuclear respiratory factor‑1 (NRF‑1) were increased in the oxidative oocytes, compared with those in the control group (P<0.05). The ratio of the proapoptotic gene, B cell lymphoma (Bcl-2)-associated X protein (BAX), to the anti‑apoptotic gene, BCL‑2, was higher in the H2O2 group, compared with the control group (P<0.05). To overcome oxidative stress in oocytes and embryos cultured in vitro, 200 µM cysteine and 200 µM cystine were added to the media, thereby increasing the concentration of intracellular glutathione (GSH) and assisting in maintaining the redox state of the cells. In conclusion, cysteine and cystine reduced the oxygen tension caused by H2O2, thereby providing a novel strategy for optimizing in vitro embryonic development systems.
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Affiliation(s)
- Zhengrong Zhou
- Jiangsu Livestock Embryo Engineering Laboratory, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu 210095, P.R. China
| | - Ruo-Xin Jia
- Jiangsu Livestock Embryo Engineering Laboratory, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu 210095, P.R. China
| | - Guomin Zhang
- Jiangsu Livestock Embryo Engineering Laboratory, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu 210095, P.R. China
| | - Yongjie Wan
- Jiangsu Livestock Embryo Engineering Laboratory, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu 210095, P.R. China
| | - Yanli Zhang
- Jiangsu Livestock Embryo Engineering Laboratory, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu 210095, P.R. China
| | - Yixuan Fan
- Jiangsu Livestock Embryo Engineering Laboratory, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu 210095, P.R. China
| | - Ziyu Wang
- Jiangsu Livestock Embryo Engineering Laboratory, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu 210095, P.R. China
| | - Pan Huang
- Department of Histology and Embryology, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu 212013, P.R. China
| | - Feng Wang
- Jiangsu Livestock Embryo Engineering Laboratory, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu 210095, P.R. China
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Türedi S, Hancı H, Çolakoğlu S, Kaya H, Odacı E. Disruption of the ovarian follicle reservoir of prepubertal rats following prenatal exposure to a continuous 900-MHz electromagnetic field. Int J Radiat Biol 2016; 92:329-37. [PMID: 27007703 DOI: 10.3109/09553002.2016.1152415] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The effects on human health of electromagnetic field (EMF) have begun to be seriously questioned with the entry into daily life of devices establishing EMF, such as cell phones, wireless fidelity, and masts. Recent studies have reported that exposure to EMF, particularly during pregnancy, affects the developing embryo/fetus. The aim of this study was therefore to examine the effects of exposure to continuous 900-Megahertz (MHz) EMF applied in the prenatal period on ovarian follicle development and oocyte differentiation. Six pregnant Sprague Dawley rats were divided equally into a non-exposed control group (CNGr) and a group (EMFGr) exposed to continuous 900-MHz EMF for 1 h daily, at the same time every day, on days 13-21 of pregnancy. New groups were established from pups obtained from both groups after birth. One group consisting of female pups from CNGr rats was adopted as newborn CNGr (New-CNGr, n = 6), and another group consisting of female pups from EMFGr rats was adopted as newborn EMFGr (New-EMFGr, n = 6). No procedure was performed on New-CNGr or New-EMFGr rats. All rat pups were sacrificed on the postnatal 34th day, and their ovarian tissues were removed. Follicle count, histological injury scoring and morphological assessment with apoptotic index criteria were performed with sections obtained following routine histological tissue preparation. Follicle count results revealed a statistically significant decrease in primordial and tertiary follicle numbers in New-EMFGr compared to New-CNGr (p < 0.05), while atretic follicle numbers and apoptotic index levels increased significantly (p < 0.05). Histopathological examination revealed severe follicle degeneration, vasocongestion, a low level of increased stromal fibrotic tissue and cytoplasmic vacuolization in granulosa cell in New-EMFGr. Prenatal exposure to continuous 900-MHz EMF for 1 h each day from days 13-21 led to a decrease in ovarian follicle reservoirs in female rat pups at the beginning of the prepubertal period.
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Affiliation(s)
- Sibel Türedi
- a Department of Histology and Embryology, Faculty of Medicine , Karadeniz Technical University , Trabzon
| | - Hatice Hancı
- a Department of Histology and Embryology, Faculty of Medicine , Karadeniz Technical University , Trabzon
| | - Serdar Çolakoğlu
- b Department of Anatomy, Faculty of Medicine , Düzce University , Düzce
| | - Haydar Kaya
- c Department of Electrical and Electronic Engineering, Faculty of Engineering , Karadeniz Technical University , Trabzon , Turkey
| | - Ersan Odacı
- a Department of Histology and Embryology, Faculty of Medicine , Karadeniz Technical University , Trabzon
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Sheng J, Yang Y, Liu W, Ji H, Lei A, Qing S. Location of oocyte-specific linker histone in pig ovaries at different developmental stages postpartum. Theriogenology 2015; 83:1203-12. [DOI: 10.1016/j.theriogenology.2014.12.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Revised: 12/08/2014] [Accepted: 12/27/2014] [Indexed: 11/22/2022]
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Zhang G, Wan Y, Zhang Y, Lan S, Jia R, Wang Z, Fan Y, Wang F. Expression of Mitochondria-Associated Genes (PPARGC1A, NRF-1, BCL-2 and BAX) in Follicular Development and Atresia of Goat Ovaries. Reprod Domest Anim 2015; 50:465-73. [PMID: 25779891 DOI: 10.1111/rda.12514] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Accepted: 02/23/2015] [Indexed: 12/31/2022]
Abstract
Most follicles undergo atresia during the developmental process. Follicular atresia is predominantly regulated by apoptosis of granulosa cells, but the mechanism underlying apoptosis via the mitochondria-dependent apoptotic pathway is unclear. We aimed to investigate whether the mitochondria-associated genes peroxisome proliferator-activated receptor-gamma, coactivator1-alpha (PPARGC1A), nuclear respiratory factor-1 (NRF-1), B-cell CLL/lymphoma 2 (BCL-2) and BCL2-associated X protein (BAX) played a role in follicular atresia through this pathway. The four mitochondria-associated proteins (PGC-1α, which are encoded by the PPARGC1A gene, NRF-1, BCL-2 and BAX) mainly expressed in granulosa cells. The mRNA and protein levels of PPARGC1A/PGC-1α and NRF-1 in granulosa cells increased with the follicular development. These results showed that these genes may play a role in the regulation of the follicular development. In addition, compared with healthy follicles, the granulosa cell in atretic follicles had a reduced expression of NRF-1, increased BAX expression and increased ratio of BAX to BCL-2 expression. These results suggested that changes of the mitochondria-associated gene expression patterns in granulosa cells may lead to follicular atresia during goat follicle development.
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Affiliation(s)
- G Zhang
- Jiangsu Livestock Embryo Engineering Laboratory, Nanjing Agricultural University, Nanjing, China
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Zhang GM, Gu CH, Zhang YL, Sun HY, Qian WP, Zhou ZR, Wan YJ, Jia RX, Wang LZ, Wang F. Age-associated changes in gene expression of goat oocytes. Theriogenology 2013; 80:328-36. [PMID: 23746875 DOI: 10.1016/j.theriogenology.2013.04.019] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2012] [Revised: 04/16/2013] [Accepted: 04/21/2013] [Indexed: 11/19/2022]
Abstract
Oocyte aging severely decreases the quality of oocytes, which hampers fertilization and subsequent embryo development. In the present study, age-dependent molecular changes in goat oocytes were investigated. First, the quality of goat oocytes with various in vitro culture times (24, 30, 36, 48, and 60 hours) was evaluated on the basis of developmental rates of parthenogenetically activated embryos and apoptosis of cumulus cells (CCs). Second, relative gene expression of six genes (mitochondrial genes: PGC-1α and NRF-1; epigenetic modification genes: SNRPN and HAT1; mitotic spindle checkpoint protein: SMAD2; and hyaluronan synthase gene: HAS3) were analyzed during oocyte aging. Third, we further studied the changes of seven genes (PGC-1α and NRF-1; apoptotic-related genes: BAX and BCL2; hyaluronan synthase gene: HAS2; metabolism-related gene: STAR; and superoxide dismutase gene: SOD1) in CCs during oocyte aging. In these studies, the blastocyst rate gradually decreased and the number of apoptotic cells significantly increased as the culture time increased (P < 0.05). Moreover, relative gene expressions of PGC-1α, NRF-1 and SMAD2 significantly decreased from 24 to 36 hours (P < 0.05), whereas the levels of HAT1 and HAS3 slowly increased as culture was prolonged. Furthermore, the levels of PGC-1α, BCL2, HAS2 and SOD1 quickly reduced, and BAX significantly increased from 24 to 36 hours in aged CCs (P < 0.05). In conclusion, goat oocytes started to age at 30 hours in vitro culture, and gene expression patterns of oocytes and CCs significantly changed as the oocytes aged. Gene expression pattern changes in CCs may provide a convenient and effective way to detect oocyte aging without compromising oocyte integrity.
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Affiliation(s)
- Guo-Min Zhang
- Center of Embryo Engineering and Technology, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
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