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Shu C, Yu Y, Xiaopan Chen, Guo J, Zhou Y, Wu D, Yang T, Fan Y, Huang Q, Shu J. Three-dimensional architecture of granulosa cell derived from oocyte cumulus complex, revealed by FIB-SEM. J Ovarian Res 2023; 16:213. [PMID: 37946316 PMCID: PMC10633969 DOI: 10.1186/s13048-023-01298-9] [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: 02/03/2023] [Accepted: 10/13/2023] [Indexed: 11/12/2023] Open
Abstract
The oocyte cumulus complex is mainly composed of an oocyte, the perivitelline space, zona pellucida and numerous granulosa cells. The cumulus granulosa cells (cGCs) provide a particularly important microenvironment for oocyte development, regulating its growth, maturation and meiosis. In this study, we studied the internal structures and cell-to-cell connections of mouse cGCs using focused ion beam scanning electron microscopy (FIB-SEM). We reconstructed three-dimensional models to display characteristic connections between the oocyte and cGCs, and to illustrate various main organelles in cGCs together with their interaction relationship. A special form of cilium identified in granulosa cell was never reported in previous literature.
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Affiliation(s)
- Chongyi Shu
- Center for Reproductive Medicine, Department of Reproductive Endocrinology, Zhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College), Hangzhou, China
| | - Yiqi Yu
- Center for Reproductive Medicine, Department of Reproductive Endocrinology, Zhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College), Hangzhou, China
| | - Xiaopan Chen
- Center for Reproductive Medicine, Department of Reproductive Endocrinology, Zhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College), Hangzhou, China
- Department of Genetic and Genomic Medicine, Zhejiang Provincial People's Hospital, (Affiliated People's Hospital, Hangzhou Medical College), Hangzhou, China
| | - Jiansheng Guo
- School of Medicine, Zhejiang University, Hangzhou, 310058, China
| | - Yier Zhou
- Center for Reproductive Medicine, Department of Reproductive Endocrinology, Zhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College), Hangzhou, China
| | - Dandan Wu
- Department of Obstetrics, Zhejiang Hospital, Hangzhou, 310012, China
| | - Tianyun Yang
- Center for Reproductive Medicine, Department of Reproductive Endocrinology, Zhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College), Hangzhou, China
| | - Yuhang Fan
- Center for Reproductive Medicine, Department of Reproductive Endocrinology, Zhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College), Hangzhou, China
| | - Qiongxiao Huang
- Center for Reproductive Medicine, Department of Reproductive Endocrinology, Zhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College), Hangzhou, China.
| | - Jing Shu
- Center for Reproductive Medicine, Department of Reproductive Endocrinology, Zhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College), Hangzhou, China.
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Moradi A, Ghasemian F, Mashayekhi F. The reaggregation of normal granulosa-cumulus cells and mouse oocytes with polycystic ovarian syndrome in vitro: An experimental study. Int J Reprod Biomed 2022; 19:987-996. [PMID: 34977456 PMCID: PMC8717076 DOI: 10.18502/ijrm.v19i11.9914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 12/12/2020] [Accepted: 03/06/2021] [Indexed: 11/24/2022] Open
Abstract
Background The dialogue between oocytes and their surrounding cells plays a major role in the progress of oocyte meiosis and their developmental potential. Objective This study aimed to evaluate the effect of co-culture of normal granulosa-cumulus cells (GCCs) with oocytes from polycystic ovarian syndrome (PCOS) mice. Materials and Methods Normal GCCs were collected from 10 virgin adult Naval Medical Research Institute female mice (30-35 gr, 7-8 wk old), and were cultured in an alpha-minimum essential medium supplemented with 5% fetal calf serum for 24-48 hr (1×106 cells/well). Then, germinal-vesicle oocytes from PCOS mice were cultured in the presence of cultured normal GCCs (experimental group) and without GCCs (control group). The maturation rate and quality of the PCOS oocytes were examined by evaluating TFAM and Cx43 gene expression (real-time PCR) and the connection among PCOS oocytes and normal GCCs after 24 hr of culture. Results The co-culture of normal GCCs and PCOS oocytes in the experimental group led to the formation of a complex called a PCOS oocyte-normal GCCs complex. The maturation rate of these complexes was significantly increased compared to that of the control group (p ≤ 0.001). A significant difference was also found in the expression of Cx43 (p ≤ 0.001) and TFAM (p < 0.05) genes in the experimental group compared with the control group. The connection between PCOS oocytes and normal GCCs was observed in the scanning electron microscope images. Conclusion Co-culture with normal GCCs improves the capacity of PCOS oocytes to enter meiosis, which may result in the promotion of assisted reproduction techniques.
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Affiliation(s)
- Amaneh Moradi
- Department of Biology, Faculty of Sciences, University of Guilan, Rasht, Iran
| | - Fatemeh Ghasemian
- Department of Biology, Faculty of Sciences, University of Guilan, Rasht, Iran
| | - Farhad Mashayekhi
- Department of Biology, Faculty of Sciences, University of Guilan, Rasht, Iran
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Fushii M, Yamada R, Lee J, Miyano T. Reestablishment of transzonal projections and growth of bovine oocytes in vitro. J Reprod Dev 2021; 67:300-306. [PMID: 34421085 PMCID: PMC8568608 DOI: 10.1262/jrd.2021-036] [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] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Transzonal projections (TZPs) that maintain bidirectional communication between oocytes and granulosa cells or cumulus cells are important structures for oocyte growth. However, whether
TZPs develop between TZP-free oocytes and granulosa cells, and whether reestablished TZPs support oocyte growth, is unknown. We first examined changes in TZPs after denudation of bovine
oocytes collected from early antral follicles (0.5–0.7 mm). Twenty-four hours after denudation, almost all the TZPs disappeared. We also examined the reestablishment of TZPs by coculturing
TZP-free denuded oocytes (DOs) with mural granulosa cells (MGCs) collected from early antral follicles. In addition, to confirm if the reestablished TZPs were functional, the reconstructed
complexes (DO+MGCs) were subjected to in vitro growth culture and found that the MGCs adhered to TZP-free DOs and TZPs were reestablished. During in vitro
growth culture, DO+MGCs developed and formed antrum-like structures. After culture, the number of TZPs in DO+MGCs increased, and the oocytes grew fully and acquired meiotic competence. These
results suggest that reestablished TZPs are able to support oocyte growth.
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Affiliation(s)
- Mihoko Fushii
- Laboratory of Developmental Biotechnology, Graduate School of Agricultural Science, Kobe University, Kobe 657-8501, Japan
| | - Rie Yamada
- Laboratory of Developmental Biotechnology, Graduate School of Agricultural Science, Kobe University, Kobe 657-8501, Japan
| | - Jibak Lee
- Laboratory of Developmental Biotechnology, Graduate School of Agricultural Science, Kobe University, Kobe 657-8501, Japan
| | - Takashi Miyano
- Laboratory of Developmental Biotechnology, Graduate School of Agricultural Science, Kobe University, Kobe 657-8501, Japan
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Abstract
Mammalian ovaries contain a large number of immature follicles. Follicular culture can contribute to the production of fertile oocytes from latent immature follicles, providing a useful
tool for exploring the developmental competencies and related factors that oocytes acquire during growth. However, the potential of oocytes produced by follicular culture is limited. Herein,
the optimal follicular culture conditions for the addition of polyvinylpyrrolidone to the medium and oxygen concentration were investigated. Polyvinylpyrrolidone with a high molecular weight
(≥ 360,000) and a 7% oxygen concentration were found to increase the blastocyst formation rate by more than 20% compared with conventional culture conditions. Although the developmental
ability of oocytes produced by follicular culture remained inferior to that of in vivo-derived oocytes, these findings may pave the way for enhanced production of fertile
oocytes in vitro and for studying the process of full developmental potency acquisition by oocytes.
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Affiliation(s)
- Saya Ota
- Department of Bioscience, Tokyo University of Agriculture, Tokyo 156-8502, Japan
| | - Shinya Ikeda
- Department of Bioscience, Tokyo University of Agriculture, Tokyo 156-8502, Japan
| | - Tomoya Takashima
- Department of Bioscience, Tokyo University of Agriculture, Tokyo 156-8502, Japan
| | - Yayoi Obata
- Department of Bioscience, Tokyo University of Agriculture, Tokyo 156-8502, Japan
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Maziero RRD, Guaitolini CRDF, Paschoal DM, Crespilho AM, Sestari DAO, Dode MAN, Landim-Alvarenga FDC. Effects of the addition of oocyte meiosis-inhibiting drugs on the expression of maturation-promoting factor components and organization of cytoplasmic organelles. Reprod Biol 2020; 20:48-62. [DOI: 10.1016/j.repbio.2019.12.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Revised: 12/16/2019] [Accepted: 12/22/2019] [Indexed: 11/28/2022]
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