1
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Chen Y, Wakimoto Y, Yano M, Nakagawa K, Hasegawa A, Shibahara H. Advancing fertility preservation in prepubertal mice: Efficacy of ovarian tissue culture and in vitro growth in mature oocyte development. J Obstet Gynaecol Res 2024. [PMID: 39155407 DOI: 10.1111/jog.16057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Accepted: 08/05/2024] [Indexed: 08/20/2024]
Abstract
AIM This study aimed to evaluate the ovarian tissue culture and in vitro follicle growth as safer alternatives to cryopreservation for generating in vitro fertilization (IVF)-ready mature oocytes from prepubertal mice without the risk of cancer cell contamination. METHODS Ovaries from prepubertal B6D2F1 mice were cultured in α-minimum essential medium supplemented with an estrogen receptor antagonist, ICI 182780. Culture duration was investigated to identify the optimal timeframe for follicle growth and oocyte maturation. Follicles were isolated mechanically or using 1 mg/mL collagenase and cultured in Matrigel matrix or polyvinylpyrrolidone. Oocyte development at metaphase II was induced by in vitro maturation, followed by IVF. RESULTS The optimal culture duration was 2-4 days, and tissues cultured beyond this period showed significant follicular degeneration. ICI 182780 supplementation resulted in the recovery of 20.5 follicles per ovary compared with 9.5 follicles in non-supplemented cultures (p < 0.05). Of the 452 isolated follicles, 237 (52.4%) showed growth, 150 (33.2%) underwent germinal vesicle breakdown, and 18 (4.0%) reached metaphase II. However, none of the metaphase II oocytes were successfully fertilized after IVF. Matrigel demonstrated a significantly higher in vitro maturation rate compared with polyvinylpyrrolidone in a comparative analysis of culture matrices (p < 0.001). CONCLUSIONS This study highlighted ovarian tissue culture and in vitro growth as effective strategies for producing mature oocytes from prepubertal mice. Further studies are required to overcome fertilization hurdles and understand the mechanisms that improve post-IVF embryo viability.
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Affiliation(s)
- Yuekun Chen
- Department of Obstetrics and Gynecology, School of Medicine, Hyogo Medical University, Nishinomiya, Japan
| | - Yu Wakimoto
- Department of Obstetrics and Gynecology, School of Medicine, Hyogo Medical University, Nishinomiya, Japan
| | - Mizuho Yano
- Department of Obstetrics and Gynecology, School of Medicine, Hyogo Medical University, Nishinomiya, Japan
| | - Kohei Nakagawa
- Department of Obstetrics and Gynecology, School of Medicine, Hyogo Medical University, Nishinomiya, Japan
| | - Akiko Hasegawa
- Department of Obstetrics and Gynecology, School of Medicine, Hyogo Medical University, Nishinomiya, Japan
| | - Hiroaki Shibahara
- Department of Obstetrics and Gynecology, School of Medicine, Hyogo Medical University, Nishinomiya, Japan
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Kawano K, Sakaguchi K, Ninpetch N, Yanagawa Y, Katagiri S. Physiological high temperatures alter the amino acid metabolism of bovine early antral follicles. J Reprod Dev 2024; 70:184-191. [PMID: 38631860 PMCID: PMC11153115 DOI: 10.1262/jrd.2023-096] [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: 11/24/2023] [Accepted: 03/22/2024] [Indexed: 04/19/2024] Open
Abstract
Heat stress reduces the developmental competence of bovine oocytes during the growth phase; however, the detailed mechanisms remain unclear. Amino acids play various critical roles in follicular development, including protein synthesis and as energy sources. We performed in vitro growth (IVG) culture of oocyte-cumulus-granulosa complexes (OCGCs) to assess the amino acid metabolism of small follicles at high temperatures. We isolated OCGCs from early antral follicles (0.5-1.0 mm) and subjected them to IVG culture for 12 days. OCGCs in the heat shock group were cultured under a temperature cycle of (38.5°C: 5 h, 39.5°C: 5 h, 40.5°C: 5 h, and 39.5°C: 9 h) to reproduce the body temperature of lactating cows under a hot environment. OCGCs in the control group were cultured at a constant temperature of 38.5°C for 24 h. Of the surviving OCGCs, those showing similar morphology and size between the groups were selected for amino acid analysis. We analyzed the free amino acids and their metabolites in the culture medium and calculated the depletion or appearance of molecular species. The depletion of three essential amino acids (isoleucine, leucine, and valine), two non-essential amino acids (aspartic acid and glycine), and ornithine was higher in the heat shock group (P < 0.05). Alanine depletion was lower in the heat shock group (P < 0.05). We concluded that heat exposure alters the amino acid metabolism of OCGCs isolated from early antral follicles, which might be involved with the diminished developmental potential of oocytes during summer.
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Affiliation(s)
- Kohei Kawano
- Laboratory of Theriogenology, Department of Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo 060-0818, Japan
- Present: Laboratory of Reproductive Physiology, Faculty of Environmental, Life, Natural Science and Technology, Okayama University, Okayama 700-8530, Japan
| | - Kenichiro Sakaguchi
- Laboratory of Theriogenology, Department of Clinical Sciences, Faculty of Veterinary Medicine, Hokkaido University, Sapporo 060-0818, Japan
- Institute of Cell Biology, School of Biological Sciences, College of Science and Engineering, University of Edinburgh, The Hugh Robson Building, Edinburgh EH8 9XD, UK
- Present: Laboratory of Veterinary Theriogenology, Joint Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, Gifu 501-1193, Japan
| | - Nattapong Ninpetch
- Laboratory of Theriogenology, Department of Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo 060-0818, Japan
- Department of Animal Science, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University, Kamphaeng Saen campus, Nakhon Pathom 73140, Thailand
| | - Yojiro Yanagawa
- Laboratory of Theriogenology, Department of Clinical Sciences, Faculty of Veterinary Medicine, Hokkaido University, Sapporo 060-0818, Japan
| | - Seiji Katagiri
- Laboratory of Theriogenology, Department of Clinical Sciences, Faculty of Veterinary Medicine, Hokkaido University, Sapporo 060-0818, Japan
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3
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Sakaguchi K. In Vitro Growth of Mammalian Follicles and Oocytes. Animals (Basel) 2024; 14:1355. [PMID: 38731360 PMCID: PMC11083657 DOI: 10.3390/ani14091355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Revised: 04/10/2024] [Accepted: 04/30/2024] [Indexed: 05/13/2024] Open
Abstract
Mammalian ovaries contain a large number of immature follicles, most of which are destined to degenerate before ovulation [...].
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Affiliation(s)
- Kenichiro Sakaguchi
- Laboratory of Veterinary Theriogenology, Joint Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, Yanagito 1-1, Gifu 501-1193, Japan;
- Division of Animal Medical Science, Center for One Medicine Innovative Translational Research, Institute for Advanced Study, Gifu University, Yanagito 1-1, Gifu 501-1193, Japan
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4
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Subiran Adrados C, Cadenas J, Polat SL, Tjäder AS, Blanche P, Kristensen SG. Exploring the potential use of platelet rich plasma (PRP) from adult and umbilical cord blood in murine follicle culture. Reprod Biol 2024; 24:100851. [PMID: 38237503 DOI: 10.1016/j.repbio.2023.100851] [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: 10/09/2023] [Revised: 12/01/2023] [Accepted: 12/27/2023] [Indexed: 04/02/2024]
Abstract
Ovarian follicle culture is a powerful tool to study follicular physiology and has potential applications in clinical and commercial settings. Despite remarkable progress, recreating folliculogenesis in vitro remains challenging for many mammalian species. This study investigates the impact of platelet-rich plasma (PRP) derived from adult blood (human platelet lysate, hPL) and umbilical cord blood (Umbilical cord plasma, UCP) on murine pre-antral follicle culture and oocyte maturation. Pre-antral follicles were cultured individually for 10 days with fetal bovine serum (FBS) serving as the control and two PRP sources (hPL and UCP) and their activated forms (Ac-hPL and Ac-UCP). The results suggest that neither hPL nor UCP, regardless of activation status, improved follicle culture outcomes compared to FBS. Interestingly, activation did not significantly impact the main functional outcomes such as maturation rates, survival, and growth. Oestradiol secretion and oocyte diameter, often considered hallmarks of follicle quality, did not show significant differences between matured and non-matured oocytes across the treatment groups. However, gene expression analysis revealed a significant upregulation of Gdf-9 and Bmp-15 mRNA levels in oocytes from the Ac-UCP group, regardless of maturation stage, suggesting that the accumulation of the mRNA could be due to potential challenges in translation in the Ac-UCP group. In conclusion, this study challenges the hypothesis that PRP, as a serum source, could improve follicle culture outcomes compared to FBS, the gold standard in murine follicle culture. Further research is needed to understand the species-specific effects of PRP and explore other potential factors affecting follicle culture and oocyte quality.
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Affiliation(s)
- Cristina Subiran Adrados
- Laboratory of Reproductive Biology, Department of Fertility, The Juliane Marie Centre for Women, Children and Reproduction, University Hospital of Copenhagen, Blegdamsvej 9, DK-2100 Copenhagen, Denmark; Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
| | - Jesús Cadenas
- Laboratory of Reproductive Biology, Department of Fertility, The Juliane Marie Centre for Women, Children and Reproduction, University Hospital of Copenhagen, Blegdamsvej 9, DK-2100 Copenhagen, Denmark
| | - Sofie Lund Polat
- Laboratory of Reproductive Biology, Department of Fertility, The Juliane Marie Centre for Women, Children and Reproduction, University Hospital of Copenhagen, Blegdamsvej 9, DK-2100 Copenhagen, Denmark
| | - Anna Sanderhage Tjäder
- Laboratory of Reproductive Biology, Department of Fertility, The Juliane Marie Centre for Women, Children and Reproduction, University Hospital of Copenhagen, Blegdamsvej 9, DK-2100 Copenhagen, Denmark
| | - Paul Blanche
- Department of Biostatistics, University of Copenhagen, Øster Farimagsgade 5, Entrance B, 2nd floor, 1014 Copenhagen, Denmark
| | - Stine Gry Kristensen
- Laboratory of Reproductive Biology, Department of Fertility, The Juliane Marie Centre for Women, Children and Reproduction, University Hospital of Copenhagen, Blegdamsvej 9, DK-2100 Copenhagen, Denmark
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5
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Magata F, Kuroki C, Sakono T, Matsuda F. Lipopolysaccharide impairs the in vitro growth, steroidogenesis, and maturation of oocyte-cumulus-granulosa cell complexes derived from bovine early antral follicles. Theriogenology 2024; 215:187-194. [PMID: 38086312 DOI: 10.1016/j.theriogenology.2023.12.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Revised: 11/21/2023] [Accepted: 12/01/2023] [Indexed: 01/06/2024]
Abstract
In postpartum dairy cows, lipopolysaccharide (LPS) derived from gram-negative bacteria causes uterine or mammary inflammation, resulting in low fertility. The present study aimed to investigate the effect of LPS on the in vitro growth (IVG), steroidogenesis, and maturation of oocyte-cumulus-granulosa cell complexes (OCGCs) derived from bovine early antral follicles. OCGCs were isolated from bovine early antral follicles (0.5-1 mm in diameter) and cultured in vitro for 12 days using media containing 0 (control), 0.01, or 1 μg/mL of LPS. The viability, cavity formation, and oocyte diameter of the OCGCs, as well as the concentrations of estradiol (E2) and progesterone (P4) in the IVG culture media, were determined. After IVG culture, oocytes collected from viable OCGCs were matured in vitro (IVM) in a medium without LPS. The nuclear maturation rate and the mitochondrial membrane potential of oocytes were determined. Bovine oocytes and cumulus-granulosa complexes derived from early antral follicles expressed genes encoding LPS receptor complex, such as toll-like receptor 4 (TLR4). Immunohistochemistry analysis further localized TLR4 expression predominantly in follicular granulosa and theca cells of early antral follicles. The viability of OCGCs and cavity formation in OCGCs were lower in the 0.01 and 1 μg/mL LPS groups than in the control group. No significant difference in oocyte diameter was observed between the treatment groups throughout the culture period. Moreover, E2 production was suppressed in the 0.01 and 1 μg/mL LPS groups from Days 4-8, whereas P4 production increased in the 1 μg/mL LPS group from Days 0-8. The nuclear maturation rate after IVM was lower in the 0.01 and 1 μg/mL LPS groups than in the control group. The mitochondrial membrane potential of post-IVM oocytes was lower in the 0.01 and 1 μg/mL LPS groups than in the control group. Taken together, these results indicate that LPS inhibited the growth and steroidogenesis of OCGCs and the meiosis and mitochondrial function of oocytes derived from early antral follicles. This study suggests that the detrimental effects of LPS on developing oocytes may contribute to long-term decreased fertility in postpartum dairy cows.
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Affiliation(s)
- Fumie Magata
- Department of Veterinary Medical Science, The University of Tokyo, Bunkyo-ku, Tokyo, Japan.
| | - Chie Kuroki
- Department of Veterinary Medical Science, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Takahiro Sakono
- Department of Veterinary Medical Science, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Fuko Matsuda
- Department of Veterinary Medical Science, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
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6
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Ebrahimi M, Dattena M, Luciano AM, Succu S, Gadau SD, Mara L, Chessa F, Berlinguer F. In vitro culture of sheep early-antral follicles: Milestones, challenges and future perspectives. Theriogenology 2024; 213:114-123. [PMID: 37839290 DOI: 10.1016/j.theriogenology.2023.09.025] [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: 06/03/2023] [Revised: 08/05/2023] [Accepted: 09/29/2023] [Indexed: 10/17/2023]
Abstract
Early antral follicles (EAFs) represent the transitional stage between pre-antral and antral follicles, containing oocytes that have completed most of their growth phase. Therefore, they offer an easily exploitable reserve for producing mature oocytes and preserving genetic resources, given their higher abundance compared to antral follicles (AFs) and shorter culture period than other pre-antral follicles (PAFs). Despite these advantages, the culture of EAFs remains challenging, and the success rates of in vitro embryo production (IVEP) from EAF-derived oocytes are still far below the standard achieved with fully grown oocytes in ruminant species. The difficulty is related to developing suitable in vitro culture systems tailored with nutrients, growth factors, and other signaling molecules to support oocyte growth. In this review, we focus on the in vitro development of sheep EAFs to provide an informative reference to current research progress. We also summarize the basic aspect of folliculogenesis in sheep and the main achievements and limitations of the current methods for EAF isolation, in vitro culture systems, and medium supplementation. Finally, we highlight future perspectives and challenges for improving EAF culture outcomes.
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Affiliation(s)
- Mohammadreza Ebrahimi
- Department of Veterinary Medicine, University of Sassari, Via Vienna 2, Sassari, Italy; Department of Animal Science, Agricultural Research Agency of Sardinia, 07100, Sassari, Italy.
| | - Maria Dattena
- Department of Animal Science, Agricultural Research Agency of Sardinia, 07100, Sassari, Italy
| | - Alberto Maria Luciano
- Reproductive and Developmental Biology Laboratory, Department of Veterinary Medicine and Animal Sciences, University of Milan, Via dell'Università, 6, 26900, Lodi, Italy
| | - Sara Succu
- Department of Veterinary Medicine, University of Sassari, Via Vienna 2, Sassari, Italy
| | - Sergio Domenico Gadau
- Department of Veterinary Medicine, University of Sassari, Via Vienna 2, Sassari, Italy
| | - Laura Mara
- Department of Animal Science, Agricultural Research Agency of Sardinia, 07100, Sassari, Italy
| | - Fabrizio Chessa
- Department of Animal Science, Agricultural Research Agency of Sardinia, 07100, Sassari, Italy
| | - Fiammetta Berlinguer
- Department of Veterinary Medicine, University of Sassari, Via Vienna 2, Sassari, Italy
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7
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Garcia Barros R, Lodde V, Franciosi F, Luciano AM. A refined culture system of oocytes from early antral follicles promotes oocyte maturation and embryo development in cattle. Reproduction 2023; 165:221-233. [PMID: 36473031 DOI: 10.1530/rep-22-0277] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 12/06/2022] [Indexed: 12/12/2022]
Abstract
In brief The proposed culture system improves the current state of in vitro culture of growing oocytes in the bovine species and allows access to the untapped gamete reserve, thus improving reproductive efficiency. Abstract The present study aimed to improve the in vitro culture of bovine oocytes collected from early antral follicles (EAFs) to support the progressive acquisition of meiotic and developmental competence. The rationale that drove the development of such a culture system was to maintain as much as possible the physiological conditions that support the oocyte growth and differentiation in vivo. To this extent, oocytes were cultured for 5 days, which parallels the transition from early to medium antral follicles (MAFs) in the bovine, and supports promoting a 3D-like structure were provided. Additionally, the main hormones (follicle-stimulating hormone, estradiol, progesterone, and testosterone) were added in concentrations similar to the ones previously observed in bovine EAFs. The meiotic arrest was imposed using cilostamide. The cultured cumulus-oocyte complexes (COCs) reached a mean diameter of 113.4 ± 0.75 µm and showed a progressive condensation of the chromatin enclosed in the germinal vesicle (GV), together with a gradual decrease in the global transcriptional activity, measured by 5-ethynyl uridine incorporation. The described morpho-functional changes were accompanied by an increased ability to mature and develop to the blastocyst stage in vitro, although not matching the rates obtained by MAF-retrieved oocytes. The described system improves the current state of in vitro culture of growing oocytes in the bovine species, and it can be used to increase the number of gametes usable for in vitro embryo production in animals of high genetic merit or with specific desirable traits.
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Affiliation(s)
- Rodrigo Garcia Barros
- Reproductive and Developmental Biology Laboratory (Redbiolab), Department of Veterinary Medicine and Animal Science, University of Milan, Milan, Italy
| | - Valentina Lodde
- Reproductive and Developmental Biology Laboratory (Redbiolab), Department of Veterinary Medicine and Animal Science, University of Milan, Milan, Italy
| | - Federica Franciosi
- Reproductive and Developmental Biology Laboratory (Redbiolab), Department of Veterinary Medicine and Animal Science, University of Milan, Milan, Italy
| | - Alberto Maria Luciano
- Reproductive and Developmental Biology Laboratory (Redbiolab), Department of Veterinary Medicine and Animal Science, University of Milan, Milan, Italy
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8
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L-Carnitine Supports the In Vitro Growth of Buffalo Oocytes. Animals (Basel) 2022; 12:ani12151957. [PMID: 35953946 PMCID: PMC9367359 DOI: 10.3390/ani12151957] [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: 05/23/2022] [Revised: 07/06/2022] [Accepted: 07/25/2022] [Indexed: 11/16/2022] Open
Abstract
This study aimed to determine the effect of L-carnitine on the growth and subsequent nuclear maturation of buffalo small growing oocytes (92−108 µm in diameter) in vitro. Oocyte-granulosa cell complexes (OGCs) were dissected from early antral follicles of slaughtered buffaloes and cultured in in vitro growth (IVG) medium with the supplementation of different concentrations (0, 1.25, 1.875 or 2.5 mM) of L-carnitine for 6 days. The results revealed that L-carnitine increased the diameter of buffalo oocytes in vitro. The degeneration rate was significantly (p < 0.05) lower in 2.5 mM of L-carnitine-treated oocytes (10%) than others (55%, 45% and 32.5% in 0, 1.25 and 1.875 mM of L-carnitine-supplemented groups, respectively). The OGCs showed antrum-like structures significantly (p < 0.05) higher in the 2.5 mM of L-carnitine group (74.0%) than the 0- and 1.25-mM groups (34.6% and 38.1%, respectively). Furthermore, in vitro grown oocytes were placed in in vitro maturation (IVM) medium for 24 h to examine meiotic competence of in vitro grown oocytes with L-carnitine. The L-carnitine (1.875 and 2.5 mM) treated oocytes showed a higher rate of nuclear maturation up to the metaphase II (MII) stage and a lower rate of degeneration. In conclusion, L-carnitine enhances the growth, prevents degeneration, promotes the formation of antrum-like structures and supports nuclear maturation of buffalo oocytes in vitro.
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9
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Effect of heat exposure on the growth and developmental competence of bovine oocytes derived from early antral follicles. Sci Rep 2022; 12:8857. [PMID: 35614303 PMCID: PMC9132889 DOI: 10.1038/s41598-022-12785-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Accepted: 05/12/2022] [Indexed: 11/08/2022] Open
Abstract
In dairy cows, low fertility caused by summer heat stress continues into the cooler autumn season. This can be caused by impaired oocyte quality in small growing follicles during summer. Here, we subjected oocyte-cumulus-granulosa complexes (OCGCs) derived from early antral follicles (0.5-1 mm) to in vitro growth (IVG) culture under two different temperature settings (the control and heat shock groups), and evaluated effects of heat exposure on growth and developmental competence of oocytes, factors affecting the developmental competence of oocytes (steroidogenesis of granulosa cells, oxidative stress in oocytes, and cell-to-cell communication between oocytes and somatic cells). Oocyte diameters after culture were smaller in the heat shock group. Although nuclear maturation and cleavage rates were similar between the groups, blastocyst rates were lower in the heat shock group (0.0%) than in the control group (27.7%), and reduced glutathione (GSH) levels in oocytes were lower in the heat shock group. Supplementation of cysteine, which stimulates GSH synthesis, increased GSH level and improved blastocyst rate of heat shocked oocytes (27.9%). These results suggest that heat exposure impairs the growth and developmental competence of oocytes in early antral follicles through GSH depletion, which can induce low fertility during summer and the following autumn.
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Chelenga M, Sakaguchi K, Kawano K, Furukawa E, Yanagawa Y, Katagiri S, Nagano M. Low oxygen environment and astaxanthin supplementation promote the developmental competence of bovine oocytes derived from early antral follicles during 8 days of in vitro growth in a gas-permeable culture device. Theriogenology 2022; 177:116-126. [PMID: 34695665 DOI: 10.1016/j.theriogenology.2021.10.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 10/12/2021] [Accepted: 10/16/2021] [Indexed: 10/20/2022]
Abstract
We evaluated the effects of a constant low (5-5%) and modulated (5-20%) oxygen environments on the in vitro development of bovine oocyte-cumulus-granulosa cell complexes (OCGCs) cultured in the presence or absence of an antioxidant (astaxanthin: Ax). OCGCs were cultured in a gas permeable culture device for 8 days in 5-5% O2 (±Ax) and 5-20% O2 (±Ax) culture conditions. In the oxygen modulated culture conditions, the oxygen concentration was switched from 5% to 20% on day 4 of culture. Ax promoted the viability of OCGCs (P < 0.05), but both oxygen and Ax had a significant effect on ROS production levels by OCGCs (P < 0.05). Specifically, ROS levels were significantly lower and higher under 5-5% O2 (+Ax) and 5-20% O2 (-Ax) conditions, respectively (P < 0.05), with intermediate levels observed in the 5-5% O2 (-Ax) and the 5-20% O2 (+Ax) culture conditions. The steroidogenic pattern was characterized by increasing estradiol-17β but with constant progesterone production levels regardless of culture conditions, suggesting the inhibition of luteinization-like changes in granulosa cells. OCGCs cultured in the 5-20% O2 (+Ax) had higher nuclear maturation rates (P < 0.05) that were similar to the oocytes grown in vivo. However, there was no clear difference in the subsequent cleavage rates among the 5-5% O2 (±Ax) and the 5-20% O2 (+Ax) culture conditions (P > 0.05). A constant low oxygen environment significantly promoted the blastocyst rates (P < 0.05); however, the presence of Ax in the 5-20% O2 (+Ax) condition also promoted development similar to the OCGCs cultured in the 5-5% O2 (-Ax) condition (P > 0.05). In conclusion, exposure of OCGCs to constant low oxygen or oxygen modulation in the presence of Ax promotes the healthy development of OCGCs during the 8-day IVG culture using the gas permeable culture device.
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Affiliation(s)
- Madalitso Chelenga
- Laboratory of Theriogenology, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, 060-0818, Japan; Department of Clinical Studies, Faculty of Veterinary Medicine, Lilongwe University of Agriculture and Natural Resources, Malawi
| | - Kenichiro Sakaguchi
- Laboratory of Theriogenology, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, 060-0818, Japan
| | - Kohei Kawano
- Laboratory of Theriogenology, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, 060-0818, Japan
| | - Eri Furukawa
- Laboratory of Theriogenology, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, 060-0818, Japan
| | - Yojiro Yanagawa
- Laboratory of Theriogenology, Department of Clinical Sciences, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, 060-0818, Japan
| | - Seiji Katagiri
- Laboratory of Theriogenology, Department of Clinical Sciences, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, 060-0818, Japan
| | - Masashi Nagano
- Laboratory of Animal Reproduction, Department of Animal Science, School of Veterinary Medicine, Kitasato University, 35-1 Higashi-23, Towada, 034-8628, Japan.
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11
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Xu J, Zelinski MB. Oocyte quality following in vitro follicle development†. Biol Reprod 2021; 106:291-315. [PMID: 34962509 PMCID: PMC9004734 DOI: 10.1093/biolre/ioab242] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 12/15/2021] [Accepted: 12/24/2021] [Indexed: 12/30/2022] Open
Abstract
In vitro follicle development (IVFD) is an adequate model to obtain basic knowledge of folliculogenesis and provides a tool for ovarian toxicity screening. IVFD yielding competent oocytes may also offer an option for fertility and species preservation. To promote follicle growth and oocyte maturation in vitro, various culture systems are utilized for IVFD in rodents, domestic animals, wild animals, nonhuman primates, and humans. Follicle culture conditions have been improved by optimizing gonadotropin levels, regulatory factors, nutrient supplements, oxygen concentration, and culture matrices. This review summarizes quality assessment of oocytes generated from in vitro-developed antral follicles from the preantral stage, including oocyte epigenetic and genetic profile, cytoplasmic and nuclear maturation, preimplantation embryonic development following in vitro fertilization, as well as pregnancy and live offspring after embryo transfer. The limitations of oocyte quality evaluation following IVFD and the gaps in our knowledge of IVFD to support proper oocyte development are also discussed. The information may advance our understanding of the requirements for IVFD, with a goal of producing competent oocytes with genetic integrity to sustain embryonic development resulting in healthy offspring.
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Affiliation(s)
- Jing Xu
- Correspondence: Division of Reproductive & Developmental Sciences, Oregon National Primate Research Center, Oregon Health & Science University, 505 NW 185th Avenue, Beaverton, OR 97006, USA. Tel: +1 5033465411; Fax: +1 5033465585; E-mail:
| | - Mary B Zelinski
- Division of Reproductive & Developmental Sciences, Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR, USA,Department of Obstetrics and Gynecology, School of Medicine, Oregon Health & Science University, Portland, OR, USA
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12
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Kohama T, Masago M, Tomioka I, Morohaku K. In vitro production of viable eggs from isolated mouse primary follicles by successive culture. J Reprod Dev 2021; 68:38-44. [PMID: 34776458 PMCID: PMC8872750 DOI: 10.1262/jrd.2021-095] [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] [Indexed: 11/23/2022] Open
Abstract
To produce viable eggs from single primary follicles in vitro, primary follicles containing oocytes (average 39.0 ± 0.2 µm in diameter) were isolated from the ovaries of
1-week-old mice, and cultured in combination with culture membranes for the first 8 days up to the secondary follicle stage, followed by the next 12 days to the later stages. After culture
with a combination of first and second culture membranes using high and low adhesion characteristics, the average oocyte diameters of the surviving follicles increased by almost two-fold in
all four groups. Further, the oocyte maturation rate was the highest (74.1%) in the culture group with low adhesion with collagenase and high adhesion. In this culture group, when the
O2 concentration was changed from 20% in the first culture to 5% in the second culture, the cleavage rate increased to 47.5%, which was comparable to the level of the in
vivo control (34.6%). Finally, 39 embryos at the 2- to 8-cell stages were transferred into the oviducts of three pseudopregnant females, and eight live pups (20.5%) were obtained.
Of the eight pups, six survived for at least six months and were fertile. The present study shows successive in vitro cultures of single isolated primary follicles for the
production of viable eggs. We believe that this culture system, with a combination of culture membranes under controlled O2 conditions, is applicable to other mammalian species,
including humans.
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Affiliation(s)
- Tomohiro Kohama
- Laboratory of Germ Cell Physiology and Engineering, Faculty of Agriculture, Shinshu University, Nagano 399-4598, Japan
| | - Maika Masago
- Laboratory of Germ Cell Physiology and Engineering, Faculty of Agriculture, Shinshu University, Nagano 399-4598, Japan
| | - Ikuo Tomioka
- Laboratory of Applied Reproductive Science, Faculty of Agriculture, Shinshu University, Nagano 399-4598, Japan
| | - Kanako Morohaku
- Laboratory of Germ Cell Physiology and Engineering, Faculty of Agriculture, Shinshu University, Nagano 399-4598, Japan.,Institute for Biomedical Sciences, Shinshu University, Nagano 399-4598, Japan
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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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14
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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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15
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Yamochi T, Hashimoto S, Morimoto Y. Mural granulosa cells support to maintain the viability of growing porcine oocytes and its developmental competence after insemination. J Assist Reprod Genet 2021; 38:2591-2599. [PMID: 33970370 DOI: 10.1007/s10815-021-02212-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Accepted: 04/27/2021] [Indexed: 11/24/2022] Open
Abstract
PURPOSE To enhance the in vitro growth of porcine oocytes, we studied the effect of mural granulosa cells (MGCs) on the viability of oocytes attached to granulosa cells (oocyte-granulosa cell complexes, OGCs) that were obtained from early antral follicles. METHODS AND RESULTS When OGCs were cultured with MGCs for 12 days, there were significant improvement (P < 0.05) in the robustness of gap junctional communication between the oocyte and the granulosa cells (82% vs. 59%), the survival rate of oocytes (57% vs. 39%), and the diameter of survived oocytes (118 μm vs. 112 μm). The rate of oocyte release of OGCs cultured with MGCs on the 12th day (1.9%) was significantly lower than that of OGCs cultured without MGCs (26%). Complete meiotic arrest was maintained in the group with MGCs (100%), while partial resumption of spontaneous meiosis was noticed in the absence of MGCs (10-19%). Furthermore, the presence of MGCs increased the oocyte maturation rate after maturation culture in both 12- and 14-day culture groups (P < 0.05, 85-88%) compared to OGCs cultured without MGCs (48-60%). MGCs also significantly improved the blastocyst formation rate (day 7) after ICSI (P < 0.05). CONCLUSIONS The data of this study thus shows that the presence of MGCs during in vitro oocyte growth plays a crucial role in supporting the developmental competence of growing porcine oocytes attached to the granulosa cells via enhancement of their viability.
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Affiliation(s)
- Takayuki Yamochi
- Reproductive Science Laboratory, Graduate School of Medicine, Osaka City University, Osaka, 545-8585, Japan.,IVF Namba Clinic, Osaka, 550-0015, Japan
| | - Shu Hashimoto
- Reproductive Science Laboratory, Graduate School of Medicine, Osaka City University, Osaka, 545-8585, Japan. .,IVF Namba Clinic, Osaka, 550-0015, Japan.
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16
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Luciano AM, Barros RG, Soares ACS, Buratini J, Lodde V, Franciosi F. Recreating the Follicular Environment: A Customized Approach for In Vitro Culture of Bovine Oocytes Based on the Origin and Differentiation State. Methods Mol Biol 2021; 2273:1-15. [PMID: 33604842 DOI: 10.1007/978-1-0716-1246-0_1] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The mammalian ovary is a large source of oocytes organized into follicles at various stages of folliculogenesis. However, only a limited number of them can be used for in vitro embryo production (IVEP), while most have yet to complete growth and development to attain full meiotic and embryonic developmental competence. While the in vitro growth of primordial follicles in the ovarian cortex has the potential to produce mature oocytes, it is still at an experimental stage. The population of early antral follicles (EAFs), instead, may represent a reserve of oocytes close to completing the growth phase, which might be more easily exploited in vitro and could increase the number of female gametes dedicated to IVEP.Here we present in vitro culture strategies that have been developed utilizing physiological parameters to support the specific needs of oocytes at distinct stages of differentiation, in order to expand the source of female gametes for IVEP by maximizing the attainment of fertilizable oocytes. Furthermore, these culture systems provide powerful tools to dissect the molecular processes that direct the final differentiation of the mammalian oocyte.
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Affiliation(s)
- Alberto Maria Luciano
- Reproductive and Developmental Biology Laboratory, Department of Health, Animal Science and Food Safety, University of Milan, Milan, Italy.
| | - Rodrigo Garcia Barros
- Reproductive and Developmental Biology Laboratory, Department of Health, Animal Science and Food Safety, University of Milan, Milan, Italy
| | - Ana Caroline Silva Soares
- Department of Structural and Functional Biology, Institute of Biosciences, Sao Paulo State University, Botucatu, Brazil
| | - Jose Buratini
- Department of Structural and Functional Biology, Institute of Biosciences, Sao Paulo State University, Botucatu, Brazil.,Biogenesi, Reproductive Medicine Centre, Monza, Italy
| | - Valentina Lodde
- Reproductive and Developmental Biology Laboratory, Department of Health, Animal Science and Food Safety, University of Milan, Milan, Italy
| | - Federica Franciosi
- Reproductive and Developmental Biology Laboratory, Department of Health, Animal Science and Food Safety, University of Milan, Milan, Italy
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17
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Fushii M, Yamada R, Miyano T. In vitro growth of bovine oocytes in oocyte-cumulus cell complexes and the effect of follicle stimulating hormone on the growth of oocytes. J Reprod Dev 2021; 67:5-13. [PMID: 33132227 PMCID: PMC7902213 DOI: 10.1262/jrd.2020-102] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 10/08/2020] [Indexed: 01/17/2023] Open
Abstract
Several successful in vitro culture experiments have used oocyte-cumulus cell-mural granulosa cell complexes (OCGCs) from early antral follicles (0.5-0.7 mm) for the growth of bovine oocytes. However, in studies related to in vitro oocyte maturation and in vitro embryo production, oocyte-cumulus cell complexes (OCCs) that have no mural granulosa cells have been widely used instead of OCGCs. The purpose of this study was to determine whether cumulus cells alone support oocyte growth. First, OCCs and OCGCs were cultured in vitro for 14 days to compare the integrity of the complexes as well as antrum formation. After 14 days, the diameter and meiotic competence of oocytes in OCCs and OCGCs were examined. Oocytes in OCCs grew fully and acquired meiotic competence similar to OCGCs, whereas antrum formation occurred later in OCCs as compared to OCGCs. Subsequently, the effects of follicle stimulating hormone (FSH) on in vitro growth of OCCs were examined for 14 days. When FSH was added to the culture medium, OCCs formed antrum-like structures one day earlier than those cultured without FSH. Oocytes cultured with 1 mIU/ml FSH grew fully and acquired meiotic competence. In contrast, when oocytes were cultured in media containing high concentrations of FSH, some of the OCCs collapsed and the number of degenerated oocytes increased. In conclusion, bovine oocytes in OCCs grow and acquire meiotic competence similar to OCGCs and, 1 mIU/ml FSH supports the development of OCCs and oocyte growth as observed in our culture system.
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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
| | - Takashi Miyano
- Laboratory of Developmental Biotechnology, Graduate School of Agricultural Science, Kobe University, Kobe 657-8501, Japan
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18
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de Figueiredo JR, Cadenas J, de Lima LF, Santos RR. Advances in in vitro folliculogenesis in domestic ruminants. Anim Reprod 2020; 16:52-65. [PMID: 33936289 PMCID: PMC8083813 DOI: 10.21451/1984-3143-ar2018-123] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Accepted: 02/18/2019] [Indexed: 01/27/2023] Open
Abstract
The in vitro follicle culture (IVFC) represents an outstanding tool to enhance our understanding of the control of folliculogenesis and to allow the future use of a large number of immature oocytes enclosed in preantral follicles (PFs) in assisted reproductive techniques in humans as well as in others mammalian species including the ruminants. So far, the best results of IVFC were reported from mice with the production of live offspring from primordial follicles cultured in vitro. Live birth has been obtained after the in vitro culture of bovine early antral follicles. However, in other ruminant species, these results have been limited to the production of a variable number of mature oocytes and low percentages of embryos after in vitro culture of goat, buffalo and sheep isolated secondary preantral follicles. The present review presents and discusses the main findings, limitations, and prospects of in vitro folliculogenesis in ruminants focusing on bovine, caprine, and ovine species.
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Affiliation(s)
- José Ricardo de Figueiredo
- Laboratory of Manipulation of Oocytes and Preantral Follicles, Faculty of Veterinary, State University of Ceara, Fortaleza CE, Brazil
| | - Jesús Cadenas
- Laboratory of Manipulation of Oocytes and Preantral Follicles, Faculty of Veterinary, State University of Ceara, Fortaleza CE, Brazil
| | - Laritza Ferreira de Lima
- Laboratory of Manipulation of Oocytes and Preantral Follicles, Faculty of Veterinary, State University of Ceara, Fortaleza CE, Brazil
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19
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The presence of synthetic polymers in the maturation medium affects the cryotolerance and developmental capacity after parthenogenic activation of vitrified goat oocytes. Cryobiology 2020; 93:84-90. [PMID: 32044324 DOI: 10.1016/j.cryobiol.2020.02.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Revised: 01/09/2020] [Accepted: 02/06/2020] [Indexed: 11/22/2022]
Abstract
The purpose of this present study is to assess if addition of the synthetic polymers in maturation medium can influence cryotolerance and subsequently embryonic development of mammalian oocytes. We examined the roles of two polymers, including polyvinyl alcohol (PVA) and polyvinylpyrrolidone (PVP), on in vitro maturation (IVM), embryonic developmental capacity, and cryotolerance of goat oocytes. The present study includes two parts. At first, goat cumulus-oocyte complexes (COCs) were matured in a medium supplemented with 10% fetal bovine serum (FBS), 3 mg/ml PVP, or 1 mg/ml PVA, respectively. Data of oocyte with first polar body, cleavage, and blastocyst following parthenogenetic activation (PA) were recorded. Secondly, after maturation in the above medium, oocytes were vitrified using the Cryotop technique and then the morphology, cleavage and blastocyst formation of vitrified oocytes have been checked. The results demonstrated that the adding of PVP or PVA in maturation medium can't affect IVM of goat oocytes in comparison with FBS, as concern cumulus cell expansion, first polar body formation, and embryonic development. Additionally, without plunging into liquid nitrogen, only exposure to the vitrification and warming solutions cannot also influence the quality of oocytes, in terms of morphology, cleavage, and blastocyst formation. However, after IVM with synthetic polymers and vitrification, the ratio of oocytes with standard morphology in PVP or PVA group was only 59.47% ± 3.56% or 54.86% ± 5.19%, respectively, and was significantly less than that in the FBS group (89.37% ± 4.52%, P < 0.05). Furthermore, the cleavage ratio of oocytes in PVP or PVA group was 37.41% ± 4.17% or 27.71% ± 3.91% and was considerably less than that in the FBS group (64.97% ± 4.69%, P < 0.05). In addition, the cleavage ratio in PVP group was statistically higher than that in PVA group (P < 0.05). In terms of blastocyst development, a significant difference was observed between the synthetic polymer group and the FBS group (24.96% ± 3.62%, P < 0.05). However, the blastocyst ratio in the PVA group (7.51% ± 1.68%) was statistically less than the PVP groups (13.20% ± 4.59%, P < 0.05) and the FBS group (P < 0.05). In conclusion, two potential serum replacements, either PVP or PVA, can support IVM and embryonic development of goat oocytes at the concentration used in this study. But IVM with synthetic polymers supplemented to maturation medium may reduce the cryotolerance of oocytes. Additionally, the supportive function of PVP on embryonic development of vitrified oocytes might be better than that of PVA.
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20
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Telfer EE, Sakaguchi K, Clarkson YL, McLaughlin M. In vitro growth of immature bovine follicles and oocytes. Reprod Fertil Dev 2020; 32:1-6. [PMID: 32188553 DOI: 10.1071/rd19270] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
The limitation in the supply of mature, fertilisable oocytes constitutes a major impediment to increasing the success of assisted reproduction, stem cell derivation and cloning in domestic species. Techniques are being developed to grow immature oocytes invitro that have the potential to increase the supply of oocytes. Mouse oocytes can be cultured from initial stages of development to maturity, and live young have been produced, but for domestic species, such as cows, with long growth periods, invitro systems that allow complete growth of oocytes contained within primordial follicles to maturity is technically challenging and has not yet been achieved. For cows, several culture systems have been developed that support specific developmental stages, but a multistep culture system will be required for complete growth invitro. This review highlights the steps that will be required to achieve the goal of growing oocytes invitro.
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Affiliation(s)
- Evelyn E Telfer
- Institute of Cell Biology, School of Biological Sciences, The University of Edinburgh, The Hugh Robson Building, 15 George Square, Edinburgh, EH8 9XD, UK; and Institute of Cell Biology, Genes and Development Group, The University of Edinburgh, The Hugh Robson Building, 15 George Square, Edinburgh, EH8 9XD, UK; and Corresponding author.
| | - Kenichiro Sakaguchi
- Institute of Cell Biology, School of Biological Sciences, The University of Edinburgh, The Hugh Robson Building, 15 George Square, Edinburgh, EH8 9XD, UK; and Institute of Cell Biology, Genes and Development Group, The University of Edinburgh, The Hugh Robson Building, 15 George Square, Edinburgh, EH8 9XD, UK; and Laboratory of Theriogenology, Department of Clinical Sciences, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Hokkaido 060-0818, Japan
| | - Yvonne L Clarkson
- Institute of Cell Biology, School of Biological Sciences, The University of Edinburgh, The Hugh Robson Building, 15 George Square, Edinburgh, EH8 9XD, UK; and Institute of Cell Biology, Genes and Development Group, The University of Edinburgh, The Hugh Robson Building, 15 George Square, Edinburgh, EH8 9XD, UK
| | - Marie McLaughlin
- Institute of Cell Biology, School of Biological Sciences, The University of Edinburgh, The Hugh Robson Building, 15 George Square, Edinburgh, EH8 9XD, UK; and Institute of Cell Biology, Genes and Development Group, The University of Edinburgh, The Hugh Robson Building, 15 George Square, Edinburgh, EH8 9XD, UK
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21
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Alam MH, Miyano T. Interaction between growing oocytes and granulosa cells in vitro. Reprod Med Biol 2020; 19:13-23. [PMID: 31956281 PMCID: PMC6955591 DOI: 10.1002/rmb2.12292] [Citation(s) in RCA: 94] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2019] [Revised: 07/22/2019] [Accepted: 07/25/2019] [Indexed: 01/21/2023] Open
Abstract
BACKGROUND Oocyte growth is accompanied by follicular development in mammalian ovaries. Since the discovery of two oocyte-derived factors, growth differentiation factor 9 (GDF9), and bone morphogenetic protein 15 (BMP15), knowledge of the bidirectional communication between oocytes and granulosa cells for ovarian function and fertility has been accumulated. In addition, the growth culture system of oocytes has been improved, further promoting the studies on the communication between oocytes and granulosa cells in vitro. METHODS We provide an overview of the role of granulosa cells in oocyte growth and the role of oocytes in follicular development along with our recent findings in culture experiments of bovine growing oocytes. MAIN FINDINGS Granulosa cells supply nutrients and metabolites through gap junctions to oocytes and secrete paracrine signals to regulate oocytes. Oocytes regulate granulosa cell proliferation and differentiation and induce antrum formation via GDF9 and BMP15. CONCLUSION Oocytes actively participate in various aspects of follicular development, including antrum formation via the oocyte-derived factors GDF9 and BMP15, whose synthesis is probably regulated by granulosa cells. In vitro studies will reveal the precise communication loop between oocytes and granulosa cells that facilitates the coordinated development of oocytes and granulosa cells in the follicles.
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Affiliation(s)
- Md Hasanur Alam
- Department of Animal Science, Faculty of Animal HusbandryBangladesh Agricultural UniversityMymensinghBangladesh
- Graduate School of Agricultural ScienceKobe UniversityKobeJapan
| | - Takashi Miyano
- Graduate School of Agricultural ScienceKobe UniversityKobeJapan
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22
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Sakaguchi K, Yanagawa Y, Yoshioka K, Suda T, Katagiri S, Nagano M. Relationships between the antral follicle count, steroidogenesis, and secretion of follicle-stimulating hormone and anti-Müllerian hormone during follicular growth in cattle. Reprod Biol Endocrinol 2019; 17:88. [PMID: 31690325 PMCID: PMC6833202 DOI: 10.1186/s12958-019-0534-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Accepted: 10/15/2019] [Indexed: 01/17/2023] Open
Abstract
BACKGROUND The antral follicle count (AFC) in mammalian ovaries positively correlates with female fertility. To clarify the causes of differences in fertility between low and high AFC cows, we investigated follicular growth dynamics and hormone concentrations in plasma, follicular fluid, and in vitro growth (IVG) media at different stages of follicular growth. METHODS Seven cows were divided into high AFC (n = 4, > 30 follicles) and low AFC (n = 3, < 30 follicles) groups based on the peak AFC detected by ultrasonography. These cows were subjected to estrous synchronization, daily ovarian ultrasonography, and blood collection. Their follicular fluid was collected from dominant follicles at different stages (selection, luteal, and ovulatory phases). In another experiment, we cultured oocyte-cumulus-granulosa cell complexes collected from early antral follicles (< 1 mm) for 12 days. Estradiol-17β (E2), testosterone (T), progesterone (P4), and anti-Müllerian hormone (AMH) concentrations in follicular fluids and plasma were measured. Plasma follicle-stimulating hormone (FSH) concentrations were examined. E2, P4, and AMH concentrations were also measured in IVG media. RESULTS The numbers of small (< 4 mm) and intermediate (4-8 mm) follicles were larger in the high AFC group than in the low AFC group (P < 0.05). The number of intermediate follicles was stable in the low AFC group, indicating consistent development. However, the number of these follicles fluctuated in the high AFC group. Plasma FSH concentrations were higher, whereas E2 and T concentrations were lower in the low AFC group (P < 0.05). E2 concentrations and the E2/P4 ratio in ovulatory follicles and IVG media on day 8 were higher in the high AFC group (P < 0.05). AMH concentrations in plasma and IVG media (P < 0.01) were higher in the high AFC group. CONCLUSIONS The weaker response to FSH of granulosa cells caused low E2 production in the low AFC group, resulting in high FSH concentrations and the consistent development of intermediate follicles. Conversely, higher E2 concentrations suppressed FSH secretion in the high AFC group. Granulosa cells in the high AFC group had the ability to produce more AMH than those in the low AFC group throughout IVG culture.
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Affiliation(s)
- Kenichiro Sakaguchi
- 0000 0001 2173 7691grid.39158.36Laboratory of Theriogenology, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Hokkaido 060-0818 Japan
- 0000 0004 0614 710Xgrid.54432.34Research Fellow of the Japan Society for the Promotion of Science, Chiyoda-ku, Tokyo, 102-0083 Japan
| | - Yojiro Yanagawa
- 0000 0001 2173 7691grid.39158.36Laboratory of Theriogenology, Department of Clinical Sciences, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Hokkaido 060-0818 Japan
| | - Koji Yoshioka
- 0000 0004 0530 9488grid.416882.1National Institute of Animal Health, NARO, Tsukuba, Ibaraki 305-0856 Japan
| | - Tomoko Suda
- 0000 0004 0530 9488grid.416882.1National Institute of Animal Health, NARO, Tsukuba, Ibaraki 305-0856 Japan
| | - Seiji Katagiri
- 0000 0001 2173 7691grid.39158.36Laboratory of Theriogenology, Department of Clinical Sciences, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Hokkaido 060-0818 Japan
| | - Masashi Nagano
- 0000 0001 2173 7691grid.39158.36Laboratory of Theriogenology, Department of Clinical Sciences, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Hokkaido 060-0818 Japan
- 0000 0000 9206 2938grid.410786.cPresent address: Laboratory of Animal Reproduction Department of Animal Science, School of Veterinary Medicine, Kitasato University, Aomori, 034-8628 Japan
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Islam MN, Alam MH, Khatun A, Akter I, Modak AK, Hashem MA, Moniruzzaman M. Effects of stem cell factor on in vitro growth of buffalo oocytes. Theriogenology 2019; 142:114-119. [PMID: 31590129 DOI: 10.1016/j.theriogenology.2019.09.044] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Revised: 09/25/2019] [Accepted: 09/26/2019] [Indexed: 11/17/2022]
Abstract
Stem cell factor (SCF) plays important roles in primordial follicle activation, oocyte growth and survival, granulosa cell proliferation, theca cell recruitment, and ovarian steroidogenesis. The aim of this study was to investigate the effect of SCF on in vitro growth of buffalo oocytes. Oocyte-granulosa cell complexes (OGCs) were dissected from early antral follicles of slaughtered buffalo ovaries and cultured for 6 days in media supplemented with 0, 50 or 100 ng/mL SCF. In vitro grown oocytes were further cultured for in vitro maturation for 24 h. The results showed that SCF significantly (P < 0.05) increased oocyte diameter in vitro. The percentages of surviving oocytes were 60, 81 and 92 in 0, 50 and 100 ng/mL SCF supplemented group, respectively. SCF promoted formation of antrum-like structures in culture. The results also showed that SCF enhanced the maturation of in vitro grown buffalo oocytes. Here, 14% in vitro grown oocytes reached metaphase II (MII) stage in 50 ng/mL SCF supplemented group, whereas the percentage was increased to 26% in 100 ng/mL SCF treated group. These results show that SCF supports the growth, viability and nuclear maturation of buffalo oocytes in vitro.
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Affiliation(s)
- M N Islam
- Department of Animal Science, Bangladesh Agricultural University, Mymensingh, 2202, Bangladesh
| | - Md Hasanur Alam
- Department of Animal Science, Bangladesh Agricultural University, Mymensingh, 2202, Bangladesh
| | - A Khatun
- Department of Animal Science, Bangladesh Agricultural University, Mymensingh, 2202, Bangladesh
| | - I Akter
- Department of Animal Science, Bangladesh Agricultural University, Mymensingh, 2202, Bangladesh
| | - A K Modak
- Department of Animal Science, Bangladesh Agricultural University, Mymensingh, 2202, Bangladesh
| | - M A Hashem
- Department of Animal Science, Bangladesh Agricultural University, Mymensingh, 2202, Bangladesh
| | - M Moniruzzaman
- Department of Animal Science, Bangladesh Agricultural University, Mymensingh, 2202, Bangladesh.
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Shibahara H, Munakata Y, Ishiguro A, Shirasuna K, Kuwayama T, Iwata H. Modification of the medium volume and gel substrate under in vitro culture conditions improves growth of porcine oocytes derived from early antral follicles. J Reprod Dev 2019; 65:375-379. [PMID: 30982793 PMCID: PMC6708857 DOI: 10.1262/jrd.2019-012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
This study compared the effects of different volumes of culture medium for the in vitro growth of oocytes derived from porcine early antral follicles (EAFs). Oocyte
granulosa cell complexes (OGCs) were collected from EAFs (0.5–0.7 mm in diameter) and individually cultured for 14 days. When OGCs were cultured in 1 ml of medium with or without
polyacrylamide gel (PAG), the presence of PAG supported granulosa cell (GC) proliferation and oocyte growth. When OGCs were cultured in 0.2 or 1 ml of medium on PAG, the number of GC in the
OGC culture and the developmental ability of the oocytes cultured in vitro were significantly higher for the 1 ml of culture medium group than for the 0.2 ml group. In
conclusion, a combination of a large volume of culture medium with PAG improved the growth and developmental ability of the oocytes cultured in vitro, which were comparable
to the oocytes collected from large antral follicles.
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Affiliation(s)
- Hidenori Shibahara
- Department of Animal Science, Tokyo University of Agriculture, Kanagawa 243-0034, Japan
| | - Yasuhisa Munakata
- Department of Animal Science, Tokyo University of Agriculture, Kanagawa 243-0034, Japan
| | - Ai Ishiguro
- Department of Animal Science, Tokyo University of Agriculture, Kanagawa 243-0034, Japan
| | - Koumei Shirasuna
- Department of Animal Science, Tokyo University of Agriculture, Kanagawa 243-0034, Japan
| | - Takehito Kuwayama
- Department of Animal Science, Tokyo University of Agriculture, Kanagawa 243-0034, Japan
| | - Hisataka Iwata
- Department of Animal Science, Tokyo University of Agriculture, Kanagawa 243-0034, Japan
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Cao Z, Gao D, Tong X, Xu T, Zhang D, Wang Y, Liu Y, Li Y, Zhang Y, Pu Y. Melatonin improves developmental competence of oocyte-granulosa cell complexes from porcine preantral follicles. Theriogenology 2019; 133:149-158. [PMID: 31100559 DOI: 10.1016/j.theriogenology.2019.05.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 04/27/2019] [Accepted: 05/01/2019] [Indexed: 01/08/2023]
Abstract
Melatonin has been reported to improve the survival rate of mouse and goat preantral follicles cultured in vitro. However, the role of melatonin in the development of oocyte-granulosa cell complexes (OGCs) isolated from preantral follicles remains unclear. Cumulus-oocyte complexes were isolated from OGCs cultured in vitro for 18.5 days and were then maturated in vitro for 42 h. The matured oocytes were parthenogenetically activated and were further cultured up to the blastocyst stage. We found that the developmental capacity of oocytes from in vitro cultured OGCs was significantly inferior to that from in vivo grown counterparts. Additionally, a 10-5 M dose of melatonin added to the medium during in vitro culture of OGCs did not improve oocyte meiotic maturation but enhanced blastocyst rate of parthenogenetically activated embryos. Besides, these beneficial effects could be reversed by luzindole treatment, a melatonin membrane receptor antagonist. mRNA sequencing analysis further revealed that melatonin caused differential expression of 76 genes of which 75 were upregulated and 1 was downregulated in OGCs. Twelve of the 76 genes were identified as potential regulators of metabolic pathways by functional analysis. Taken together, these results indicate that melatonin improves developmental competence of porcine oocyte-granulosa cell complexes.
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Affiliation(s)
- Zubing Cao
- Anhui Province Key Laboratory of Local Livestock and Poultry, Genetical Resource Conservation and Breeding, College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Di Gao
- Anhui Province Key Laboratory of Local Livestock and Poultry, Genetical Resource Conservation and Breeding, College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Xu Tong
- Anhui Province Key Laboratory of Local Livestock and Poultry, Genetical Resource Conservation and Breeding, College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Tengteng Xu
- Anhui Province Key Laboratory of Local Livestock and Poultry, Genetical Resource Conservation and Breeding, College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Dandan Zhang
- Anhui Province Key Laboratory of Local Livestock and Poultry, Genetical Resource Conservation and Breeding, College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Yiqing Wang
- Anhui Province Key Laboratory of Local Livestock and Poultry, Genetical Resource Conservation and Breeding, College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Ya Liu
- Anhui Province Key Laboratory of Local Livestock and Poultry, Genetical Resource Conservation and Breeding, College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Yunsheng Li
- Anhui Province Key Laboratory of Local Livestock and Poultry, Genetical Resource Conservation and Breeding, College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Yunhai Zhang
- Anhui Province Key Laboratory of Local Livestock and Poultry, Genetical Resource Conservation and Breeding, College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Yong Pu
- Anhui Province Key Laboratory of Local Livestock and Poultry, Genetical Resource Conservation and Breeding, College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China.
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Abstract
Eggs are female germ cells that are required for producing offspring through sexual reproduction. In mammals, eggs are produced in the ovary and ovulated into the oviduct. It is well known that over 99% of eggs are degenerated without ovulation, so that many studies have attempted in vitro folliculogenesis to produce many eggs in different species for a few decades. Although many methods have been developed, a success of in vitro egg production with the resultant live birth of offspring has been limited, especially in livestock animals. More recently, we have succeeded in producing live pups derived from in vitro/ex vivo egg production in mice. This review aims to introduce our recent findings with a brief history of in vitro/ex vivo culture systems for follicles and ovaries.
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Affiliation(s)
- Kanako Morohaku
- School of Science and Technology, Institute of Agriculture, Division of Animal Science, Shinshu University, Nagano 399-4598, Japan.,Institute for Biomedical Sciences, Shinshu University, Nagano 399-4598, Japan
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27
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Influence of interleukin 1 beta and tumour necrosis factor alpha on the in vitro growth, maturation and mitochondrial distribution of bovine oocytes from small antral follicles. ZYGOTE 2018; 26:381-387. [PMID: 30378512 DOI: 10.1017/s0967199418000382] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
SummaryThis study aimed to investigate the effects of IL1β and TNFα on growth and maturation of oocytes from small follicles (1-3 mm) during in vitro culture. To this end, cumulus-oocyte complexes (COCs) with diameters of ~110 µm were cultured in TCM-199 medium alone or supplemented with IL1β (10 ng/ml), TNFα (10 ng/ml) or both for 48 h. The oocytes were measured at the beginning and at the end of the culture period. COCs were cultured for 20 h in pre-maturation medium and then half of the COCs of each group was destined for in vitro maturation and the remaining COCs were used to evaluate meiotic progression, mitochondrial distribution and the expression of mRNAs for GDF-9, c-Mos, Cyclin-B1 and H1foo. The results showed that COCs cultured with TNFα alone or together with IL1β had higher diameters than those cultured in control medium alone or supplemented with IL1β. Control oocytes isolated from large antral follicles (>5 mm) had heterogeneous distribution of mitochondria. Oocytes isolated from small antral follicles, that had been grown in vitro in TCM-199 alone or supplemented with TNFα had similar heterogeneous mitochondrial distribution before in vitro maturation (IVM). After IVM, mitochondria were heterogeneously distribution when cultured in TCM-199. However, when cultured with TNFα and/or IL1β, mitochondria were homogeneously distributed. Presence of TNFα and/or IL1β in TCM-199 culture medium did not influence the expression of mRNAs for GDF-9, c-Mos, Cyclin-B1 and H1foo. In conclusion, TNFα and a mixture of TNFα and IL1β both stimulated the growth of bovine oocytes during their in vitro culture, but do not influence gene expression in grown oocytes.
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Sakaguchi K, Tanida T, Abdel-Ghani MA, Kanno C, Yanagawa Y, Katagiri S, Nagano M. Relationship between the antral follicle count in bovine ovaries from a local abattoir and steroidogenesis of granulosa cells cultured as oocyte-cumulus-granulosa complexes. J Reprod Dev 2018; 64:503-510. [PMID: 30135328 PMCID: PMC6305852 DOI: 10.1262/jrd.2018-080] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
The antral follicle count (AFC) is used as an indicator of cow fertility. We herein investigated the relationship between AFC and the steroidogenesis of granulosa cells and confirmed the
developmental competence of oocytes derived from early antral follicles (0.5–1.0 mm) using in vitro growth culture. Slaughterhouse-derived ovaries were divided into high (≥
25) and low (< 25) AFC groups based on AFC (≥ 2.0 mm). Oocyte-cumulus-granulosa complexes (OCGCs) collected from early antral follicles were cultured for 12 days. The total number,
viability, and diameter of granulosa cells and estradiol-17β and progesterone production during the culture were evaluated. Surviving oocytes on day 12 were subjected to in
vitro maturation, and their volume and nuclear status were evaluated. Some oocytes were subjected to the evaluation of developmental competence to blastocysts. Although the total
number and viability of granulosa cells did not differ between the groups, granulosa cell diameters were smaller in the high AFC group than in the low AFC group. The estradiol-17β and
progesterone ratio on day 8 was higher in the high AFC group than in the low AFC group. Oocyte volumes and nuclear maturation rates were greater in the high AFC group than in the low AFC
group. The development rate to blastocysts was 9.1% in the high AFC group, while no oocytes developed to blastocysts in the low AFC group. Therefore, estradiol-17β production by granulosa
cells appears to be greater in high AFC cattle than in low AFC cattle, thereby promoting the acquisition of oocyte competence.
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Affiliation(s)
- Kenichiro Sakaguchi
- Laboratory of Theriogenology, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo 060-0818, Japan.,Research Fellow of Japan Society for the Promotion of Science
| | - Takashi Tanida
- Laboratory of Theriogenology, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo 060-0818, Japan
| | - Mohammed A Abdel-Ghani
- Department of Theriogenology, Faculty of Veterinary Medicine, Assuit University, Assuit 71515, Egypt.,Laboratory of Theriogenology, Department of Clinical Sciences, Faculty of Veterinary Medicine, Hokkaido University, Sapporo 060-0818, Japan
| | - Chihiro Kanno
- Laboratory of Theriogenology, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo 060-0818, Japan
| | - Yojiro Yanagawa
- Laboratory of Theriogenology, Department of Clinical Sciences, Faculty of Veterinary Medicine, Hokkaido University, Sapporo 060-0818, Japan
| | - Seiji Katagiri
- Laboratory of Theriogenology, Department of Clinical Sciences, Faculty of Veterinary Medicine, Hokkaido University, Sapporo 060-0818, Japan
| | - Masashi Nagano
- Laboratory of Theriogenology, Department of Clinical Sciences, Faculty of Veterinary Medicine, Hokkaido University, Sapporo 060-0818, Japan
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Alam MH, Lee J, Miyano T. GDF9 and BMP15 induce development of antrum-like structures by bovine granulosa cells without oocytes. J Reprod Dev 2018; 64:423-431. [PMID: 30033985 PMCID: PMC6189575 DOI: 10.1262/jrd.2018-078] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
The role of oocytes in follicular antrum formation is not well understood. We examined the effect of oocyte-derived growth factors, growth differentiation factor 9 (GDF9) and bone morphogenetic protein 15 (BMP15), on the formation of antrum-like structures by cultured bovine oocyte-granulosa cell complexes (OGCs). OGCs containing growing oocytes (105‒115 µm in diameter) were collected from early antral follicles (1.2‒1.8 mm) and used to prepare oocytectomized complexes (OXCs) and granulosa cell complexes (GCs). The mRNAs of GDF9 and BMP15 were expressed in the oocytes, but not in the granulosa cells. The complexes were cultured for five days with or without GDF9 and BMP15 either alone or in combination. The OGCs maintained their complex integrity and developed antrum-like structure, whereas OXCs and GCs neither maintained their integrity nor developed any antrum-like structure without growth factors. GDF9 or BMP15 alone increased the integrity of these complexes and induced antrum-like structures in OXCs and GCs. Moreover, the combination of GDF9 and BMP15 was more potent for both phenomena in all types of complexes. In OXCs and GCs cultured without GDF9 and BMP15 or with BMP15 alone, outgrowing granulosa cells differentiated into fibroblast-like cells. The combination of GDF9 and BMP15 suppressed the appearance of fibroblast-like cells in OXCs and GCs during incubation. Instead, the granulosa cells appeared rhomboid and pebble-like in shape, similar to those in OGCs cultured without supplementation of GDF9 and BMP15. These results suggest that oocytes maintain complex integrity by preventing granulosa cell differentiation and participate in follicular antrum formation via GDF9 and BMP15.
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Affiliation(s)
- Md Hasanur Alam
- 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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Inhibition of PDE3A sustains meiotic arrest and gap junction of bovine growing oocytes in in vitro growth culture. Theriogenology 2018; 118:110-118. [PMID: 29886357 DOI: 10.1016/j.theriogenology.2018.05.028] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 05/22/2018] [Accepted: 05/23/2018] [Indexed: 11/22/2022]
Abstract
Bovine growing oocytes with a diameter of 105-115 μm from early antral follicles (1.2-1.8 mm) are able to resume meiosis, but lack the competence to mature to metaphase II. To confer full maturation competence onto the oocytes, culture systems which can support their growth and prevent their meiotic resumption during culture are needed. In this study, we cultured growing oocytes for 5 days to examine the effects of different phosphodiesterase (PDE) inhibitors on meiotic arrest and acquisition of full maturation competence of growing oocytes, and their gap junctional communication with cumulus cells. Growing oocyte-cumulus complexes (OCCs) were cultured with 3-isobutyl-1-methylxanthine (IBMX; broad-spectrum PDE inhibitor), rolipram (PDE4D inhibitor), cilostamide and milrinone (PDE3A inhibitors). The mean diameters of oocytes increased similarly in all groups. IBMX, cilostamide and milrinone induced antrum formation by OCCs and maintained meiotic arrest of oocytes during culture, whereas rolipram neither promoted antrum formation nor maintained oocyte meiotic arrest. Gap junctional communication between oocytes and cumulus cells was maintained by IBMX and cilostamide, but not by rolipram as judged by the transfer of injected lucifer yellow dye from oocytes to cumulus cells. In subsequent in vitro maturation, oocytes grown with IBMX, cilostamide and milrinone showed full maturation competence. These results suggest that PDE3A inhibition maintains the meiotic arrest of bovine growing oocytes and sustains their gap junctional communication with cumulus cells for 5 days, thereby contributing to their acquisition of full maturation competence.
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Mizumachi S, Aritomi T, Sasaki K, Matsubara K, Hirao Y. Macromolecular crowded conditions strengthen contacts between mouse oocytes and companion granulosa cells during in vitro growth. J Reprod Dev 2018; 64:153-160. [PMID: 29459533 PMCID: PMC5902903 DOI: 10.1262/jrd.2017-162] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Macromolecular crowded culture medium formed by addition of polyvinylpyrrolidone (PVP; molecular weight = 360 000), positively influences the viability, growth, and development of bovine
oocytes. Owing to its apparently various effects, uncovering the specific mechanisms of crowding responsible for these outcomes is important. The present study was conducted to determine the
effects of crowding on oocytes with a particular focus on the intimacy of contacts between oocyte and cumulus/granulosa cells. Growing mouse oocyte-granulosa cell complexes were cultured for
10 days in a modified α-minimum essential medium, supplemented with PVP at a concentration of 0%, 1%, 2%, or 3% (w/v). Although the complexes developed in all groups, 2% and 3% PVP medium
induced a substantial morphological modification, and a larger proportion of oocytes associated with cumulus cells survived in 3% PVP medium than in the 0% or 1% PVP medium. No significant
difference was found in the frequencies of polar body extrusion (78–88%) and blastocyst formation (approximately 40%) after in vitro fertilization among the experimental
groups. Confocal laser scanning microscopy indicated a higher number of transzonal processes reaching the oocyte from cumulus cells in 2% PVP medium than in 0% PVP medium. Transmission
electron microscopy depicted close adhesion of the oocyte with cumulus cells in 2% PVP medium —bearing a resemblance to their in vivo counterparts— and loose adhesion in 0%
PVP medium. In conclusion, we found that a mechanism for the action of crowded conditions involves the strengthening of contacts and communication between oocytes and companion
cumulus/granulosa cells.
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Affiliation(s)
- Shizuka Mizumachi
- Graduate School of Agriculture, Iwate University, Iwate 020-8550, Japan
| | - Taiki Aritomi
- Department of Bioscience, Tokyo University of Agriculture, Tokyo 156-8502, Japan
| | - Kuniaki Sasaki
- Laboratory of Electron Microscope, Division of Technical Support, Iwate University, Iwate 020-8550, Japan
| | - Kazuei Matsubara
- Graduate School of Agriculture, Iwate University, Iwate 020-8550, Japan
| | - Yuji Hirao
- Institute of Livestock and Grassland Science, NARO, Ibaraki 305-0901, Japan
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32
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Cadenas J, Maside C, Ferreira A, Vieira L, Leiva-Revilla J, Paes V, Alves B, Brandão F, Rodrigues A, Wheeler M, Figueiredo J. Relationship between follicular dynamics and oocyte maturation during in vitro culture as a non-invasive sign of caprine oocyte meiotic competence. Theriogenology 2018; 107:95-103. [DOI: 10.1016/j.theriogenology.2017.10.038] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Revised: 09/29/2017] [Accepted: 10/29/2017] [Indexed: 11/16/2022]
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Nagamatsu G, Hayashi K. Stem cells, in vitro gametogenesis and male fertility. Reproduction 2017; 154:F79-F91. [PMID: 29133304 DOI: 10.1530/rep-17-0510] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Revised: 10/24/2017] [Accepted: 11/13/2017] [Indexed: 12/12/2022]
Abstract
Reconstitution in culture of biological processes, such as differentiation and organization, is a key challenge in regenerative medicine, and one in which stem cell technology plays a central role. Pluripotent stem cells and spermatogonial stem cells are useful materials for reconstitution of germ cell development in vitro, as they are capable of differentiating into gametes. Reconstitution of germ cell development, termed in vitro gametogenesis, will provide an experimental platform for a better understanding of germ cell development, as well as an alternative source of gametes for reproduction, with the potential to cure infertility. Since germ cells are the cells for 'the next generation', both the culture system and its products must be carefully evaluated. In this issue, we summarize the progress in in vitro gametogenesis, most of which has been made using mouse models, as well as the future challenges in this field.
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Affiliation(s)
- Go Nagamatsu
- Department of Stem Cell Biology and MedicineGraduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Katsuhiko Hayashi
- Department of Stem Cell Biology and MedicineGraduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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34
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Wang JJ, Ge W, Liu JC, Klinger FG, Dyce PW, De Felici M, Shen W. Complete in vitro oogenesis: retrospects and prospects. Cell Death Differ 2017; 24:1845-1852. [PMID: 28841213 PMCID: PMC5635224 DOI: 10.1038/cdd.2017.134] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Revised: 06/13/2017] [Accepted: 07/20/2017] [Indexed: 11/22/2022] Open
Abstract
Precise control of mammalian oogenesis has been a traditional focus of reproductive and developmental biology research. Recently, new reports have introduced the possibility of obtaining functional gametes derived in vitro from stem cells. The potential to produce functional gametes from stem cells has exciting applications for regenerative medicine though still remains challenging. In mammalian females ovulation and fertilization is a privilege reserved for a small number of oocytes. In reality the vast majority of oocytes formed from primordial germ cells (PGCs) will undergo apoptosis, or other forms of cell death. Removal occurs during germ cell cyst breakdown and the establishment of the primordial follicle (PF) pool, during the long dormancy at the PF stage, or through follicular atresia prior to reaching the ovulatory stage. A way to solve this limitation could be to produce large numbers of oocytes, in vitro, from stem cells. However, to recapitulate mammalian oogenesis and produce fertilizable oocytes in vitro is a complex process involving several different cell types, precise follicular cell-oocyte reciprocal interactions, a variety of nutrients and combinations of cytokines, and precise growth factors and hormones depending on the developmental stage. In 2016, two papers published by Morohaku et al. and Hikabe et al. reported in vitro procedures that appear to reproduce efficiently these conditions allowing for the production, completely in a dish, of a relatively large number of oocytes that are fertilizable and capable of giving rise to viable offspring in the mouse. The present article offers a critical overview of these results as well as other previous work performed mainly in mouse attempting to reproduce oogenesis completely in vitro and considers some perspectives for the potential to adapt the methods to produce functional human oocytes.
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Affiliation(s)
- Jun-Jie Wang
- Institute of Reproductive Sciences, College of Life Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Wei Ge
- Institute of Reproductive Sciences, College of Life Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Jing-Cai Liu
- Institute of Reproductive Sciences, College of Life Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Francesca Gioia Klinger
- Department of Biomedicine and Prevention, University of Rome ‘Tor Vergata’, Rome 00133, Italy
| | - Paul W Dyce
- Department of Animal Sciences, Auburn University, Auburn, AL 36849, USA
| | - Massimo De Felici
- Department of Biomedicine and Prevention, University of Rome ‘Tor Vergata’, Rome 00133, Italy
| | - Wei Shen
- Institute of Reproductive Sciences, College of Life Sciences, Qingdao Agricultural University, Qingdao 266109, China
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35
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Yamochi T, Hashimoto S, Yamanaka M, Nakaoka Y, Morimoto Y. Optimum culture duration for growing oocytes to attain meiotic and fertilization competence. J Reprod Dev 2017; 63:591-595. [PMID: 29021500 PMCID: PMC5735270 DOI: 10.1262/jrd.2017-110] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
To determine the optimum culture duration for porcine growing oocytes (GOs) to attain maturation competence, we examined the meiotic competence, chromatin configuration, and fertilization ability of porcine oocytes
obtained from early antral follicles and cultured for 10–16 days. The survival rate of oocytes after 10 days of culture (62.8%) was similar to that of oocytes after 12 days of culture (55%) and significantly higher than
that of oocytes cultured for 14 and 16 days (52.9 and 24.3%, respectively). No significant difference was observed in the diameter of ooplasm from oocytes cultured for different durations (117.4–118.3 μm). The maturation
rates of surviving oocytes after 10 and 16 days of culture (38.3 and 22.7%, respectively) were significantly lower than those of oocytes cultured for 12 and 14 days, and their in vivo counterparts
(52.8–62.4%). The number of oocytes with surrounded-nucleolus chromatin was significantly lower in the 10-day culture group (78.4%) as compared with 14-day culture and in vivo counterpart groups (93.6
and 95.1%, respectively). After in vitro maturation and intracytoplasmic sperm injection, no significant difference was observed in the rate of fertilization among oocytes cultured for 12 and 14 days,
and their in vivo counterparts (40.5–47.2%). Thus, porcine GOs required at least 12 days to acquire meiotic and fertilization competence, and the culture duration to maximize the number of mature oocytes
ranged from 12 to 14 days.
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Affiliation(s)
| | | | | | | | - Yoshiharu Morimoto
- IVF Namba Clinic, Osaka 550-0015, Japan.,HORAC Grand Front Osaka Clinic, Osaka 530-0011, Japan
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36
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Abstract
Mammalian fetal ovaries contain numerous primordial germ cells (PGCs), although few mature oocytes are obtained from females, owing to apoptosis and follicle atresia. The regulatory mechanisms underlying oogenesis/folliculogenesis remain unknown. Development of methods for obtaining mature oocytes from PGCs in fetal ovaries in vitro could contribute to clarifying these mechanisms. The failure of follicle assembly has been found to be the most challenging aspect in conventional culture conditions. Recently, we established novel culture conditions that enable successful follicle assembly, sustaining interactions between the oocyte and somatic cells, and, in turn, promoting oocyte growth and maturation. Mature oocytes were differentiated from PGCs after a 1-month culture period. A hundred mouse offspring were obtained from approximately a thousand mature oocytes, indicating that oocytes that were differentiated from PGCs in vitro acquired totipotency after fertilization. Here we provide a detailed protocol for using this in vitro system. This in vitro system will potentially provide a novel platform for studying oogenesis and preservation of female germ cells.
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38
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Effects of synthetic polymers on in vitro maturation of sheep oocytes and subsequent developmental capacity after parthenogenetic activation or fertilization. Small Rumin Res 2017. [DOI: 10.1016/j.smallrumres.2017.06.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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39
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Sakaguchi K, Huang W, Yang Y, Yanagawa Y, Nagano M. Relationship between in vitro growth of bovine oocytes and steroidogenesis of granulosa cells cultured in medium supplemented with bone morphogenetic protein-4 and follicle stimulating hormone. Theriogenology 2017; 97:113-123. [PMID: 28583594 DOI: 10.1016/j.theriogenology.2017.04.030] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Revised: 04/21/2017] [Accepted: 04/21/2017] [Indexed: 10/19/2022]
Abstract
Bone morphogenetic protein-4 (BMP-4) and FSH play important regulatory roles in follicular growth and steroidogenesis in vivo. The purpose of this study was to investigate the effects of BMP-4 and FSH on in vitro growth (IVG) and steroidogenesis of bovine oocyte-cumulus-granulosa complexes (OCGCs). We cultured OCGCs collected from early antral follicles (0.5-1 mm) in medium without BMP-4 and FSH for 4 days and investigated the appearance of OCGCs and their steroidogenesis. During the first 4 days of IVG, morphologically normal OCGCs produced more estradiol-17β (E2), but less progesterone (P4). Morphologically normal OCGCs were subjected to an additional culture in medium supplemented with BMP-4 (0, 10, and 50 ng/mL) and FSH (0 and 0.5 ng/mL) until day 12. We examined the viability and steroidogenesis of OCGCs after 8 and 12 days of culture. Oocyte growth, characteristics of granulosa cells, and the maturational competence of oocytes were also investigated. On day 8, the viability of OCGCs cultured without FSH was higher in the 10 ng/mL BMP-4 group than in the 50 ng/mL BMP-4 group (P < 0.05). No significant difference was observed in the viability of groups cultured with FSH, regardless of the addition of BMP-4, and FSH improved the viability of 50 ng/mL BMP-4 group similar to 10 ng/mL BMP-4 group. The total number of granulosa cells was larger in 10 ng/mL BMP-4 group cultured with FSH than in 50 ng/mL BMP-4 group cultured with FSH on day 8 (P < 0.05). E2 production decreased from days 8-12, and P4 production increased throughout IVG culture, regardless of the addition of BMP-4 and FSH (P < 0.05). No significant differences in E2 production were observed between groups from days 4-8, regardless of whether BMP-4 was added without FSH; however, E2 production in the group cultured with 50 ng/mL BMP-4 was suppressed by FSH. BMP-4 suppressed E2 production from days 8-12, regardless of whether FSH was added. The group cultured with 10 ng/mL BMP-4 without FSH showed the lowest P4 production among all groups for all culture periods. OCGCs that produced mature oocytes tended to secrete more E2 and less P4 than OCGCs that produced immature oocytes. In conclusion, until day 8 of the IVG culture, P4 production by OCGCs was suppressed by the addition of 10 ng/mL BMP-4 in the absence of FSH, without inhibiting E2 production. These conditions appear to mimic growing follicles until day 8 and mimic degenerating follicles from days 8-12 of culture.
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Affiliation(s)
- Kenichiro Sakaguchi
- Laboratory of Theriogenology, Department of Veterinary Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, 060-0818, Japan.
| | - Weiping Huang
- Laboratory of Theriogenology, Department of Veterinary Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, 060-0818, Japan; Anhui Provincial Laboratory of Animal Genetic Resources Protection and Breeding, College of Animal Sciences and Technology, Anhui Agricultural University, Hefei, Anhui, China.
| | - Yinghua Yang
- Laboratory of Theriogenology, Department of Veterinary Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, 060-0818, Japan.
| | - Yojiro Yanagawa
- Laboratory of Theriogenology, Department of Veterinary Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, 060-0818, Japan.
| | - Masashi Nagano
- Laboratory of Theriogenology, Department of Veterinary Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, 060-0818, Japan.
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Differentiation of Mouse Primordial Germ Cells into Functional Oocytes In Vitro. Ann Biomed Eng 2017; 45:1608-1619. [PMID: 28243826 PMCID: PMC5489615 DOI: 10.1007/s10439-017-1815-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Accepted: 02/15/2017] [Indexed: 01/01/2023]
Abstract
Various complex molecular events in oogenesis cannot be observed in vivo. As a bioengineering technique for female reproductive tissues, in vitro culture systems for female germ cells have been used to analyze oogenesis and preserve germ cells for over 20 years. Recently, we have established a new methodological approach for the culture of primordial germ cells (PGCs) and successfully obtained offspring. Our PGC culture system will be useful to clarify unresolved mechanisms of fertility and sterility from the beginning of mammalian oogenesis, before meiosis. This review summarizes the history of culture methods for mammalian germ cells, our current in vitro system, and future prospects for the culture of germ cells.
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Promotion of glucose utilization by insulin enhances granulosa cell proliferation and developmental competence of porcine oocyte grown in vitro. ZYGOTE 2016; 25:65-74. [DOI: 10.1017/s0967199416000356] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
SummaryIn vitro culture of the oocyte granulosa cell complexes (OGCs) from early antral follicles (EAFs) shows granulosa cell (GC) proliferation, but to a lesser extent than that observed in vivo during follicle development. As the number of GCs closely relates to energy sufficiency of the oocytes, enhancement of GC proliferation influences oocyte development. GC proliferation depends on glycolysis and insulin-mediated AKT/mTOR signaling pathway; therefore, addition of culture medium containing insulin and glucose may potentially promote GC proliferation and hence improve oocyte development. In the present study, we assessed the effect of exogenous insulin and glucose concentration on GC proliferation and oocyte energy status as well as developmental abilities of porcine oocytes grown in vitro. In the presence of 5.5 mM of glucose (Low), a comparison of 10 versus 20 μg/ml insulin showed that high insulin enhanced GC proliferation but exhausted glucose from the medium, which resulted in low energy status including lipid and adenosine triphosphate of the oocyte. Whereas, in the presence of 20 μg/ml insulin, medium with 11 mM glucose (High) enhanced GC proliferation and oocyte energy status as well as developmental ability up to the blastocyst stage. Considering that there was no difference in OGCs development observed with medium (10 μg/ml insulin) containing 5.5 versus 11 mM glucose, we concluded that the combination of high insulin and glucose enhanced GC proliferation and energy status of oocytes as well as the developmental ability of the oocytes grown in vitro.
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Makita M, Ueda M, Miyano T. The fertilization ability and developmental competence of bovine oocytes grown in vitro. J Reprod Dev 2016; 62:379-84. [PMID: 27151093 PMCID: PMC5004794 DOI: 10.1262/jrd.2016-001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In vitro growth culture systems for oocytes are being developed in
several mammalian species. In these growth culture systems, in vitro
grown oocytes usually have lower blastocyst formation than in vivo
grown oocytes after in vitro fertilization. Furthermore, there have
been a few reports that investigated the fertilization ability of in
vitro grown oocytes in large animals. The purpose of this study was to
investigate the fertilization process and developmental competence of bovine oocytes
grown in vitro. Oocyte-granulosa cell complexes collected from
bovine early antral follicles (0.4−0.7 mm in diameter) were cultured for growth with
17β-estradiol and androstenedione for 14 days and matured in vitro.
These oocytes were then inseminated for 6 or 12 h, and further cultured for
development up to 8 days in vitro. After growth culture, oocytes
grew from 95 µm to around 120 µm and acquired maturation competence (79%). Although
fertilization rates of in vitro grown oocytes were low after 6 h of
insemination, 34% of in vitro grown oocytes fertilized normally
after 12 h of insemination, having two polar bodies and two pronuclei with a sperm
tail, and 22% of these oocytes developed into blastocysts after 8 days of culture.
The fertilization and blastocyst formation rates were similar to those of in
vivo grown oocytes. In addition, blastocyst cell numbers were also
similar between in vitro and in vivo grown oocytes.
In conclusion, in vitro grown bovine oocytes are similar to
in vivo grown oocytes in fertilization ability and can develop
into blastocysts.
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Affiliation(s)
- Miho Makita
- Graduate School of Agricultural Science, Kobe University, Kobe 657-8501, Japan
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Yang Y, Kanno C, Huang W, Kang SS, Yanagawa Y, Nagano M. Effect of bone morphogenetic protein-4 on in vitro growth, steroidogenesis and subsequent developmental competence of the oocyte-granulosa cell complex derived from bovine early antral follicles. Reprod Biol Endocrinol 2016; 14:3. [PMID: 26769429 PMCID: PMC4714481 DOI: 10.1186/s12958-016-0137-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Accepted: 01/10/2016] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Bone morphogenetic proteins (BMPs) play important regulatory roles during folliculogenesis. Theca-derived BMP-4 may be beneficial to in vitro growth culture of early antral follicle-derived oocyte-granulosa cell complexes (OGCs), which is lacking in theca-derived products. METHODS BMP-4 (0 [control], 10 and 50 ng/mL) was added to growth culture medium. Growth, steroidogenesis and the subsequent developmental competence of OGCs derived from bovine early antral follicles (0.5-1 mm) were examined. RESULTS At 4, 8 and 12 days of growth culture, progesterone production by granulosa cells was suppressed by the addition of BMP-4 compared to the control (P < 0.05). At 12 days, both the OGC survivability and granulosa cell number in the 50 ng/mL BMP-4 treated group were lower than those of control (48.2 % vs. 67.8 %; 4.96 × 10(4) vs. 8.5 × 10(4) cells; P < 0.05, respectively), while no difference was found between 10 ng/mL and the control. The mean diameters of granulosa cell in the BMP-4 treated groups were smaller than that of the control (P < 0.05). However, the granulosa cell viability, oocyte diameter, oocyte nuclear maturation rate and normal fertilization rate were similar in all of the experimental groups, regardless of the amount of BMP-4 addition (P ˃ 0.05). BMP-4 treated in vitro-grown oocytes showed lower blastocyst rates than untreated ones (P < 0.05). CONCLUSIONS BMP-4 addition during in vitro growth culture suppressed progesterone production and decreased the diameter of granulosa cells, suggesting its effect on steroidogenesis; importantly, it did not affect oocyte growth, nuclear maturation and fertilization. However, BMP-4 impaired subsequent embryonic development, and in higher concentration (50 ng/mL) even compromised OGC viability by suppressing proliferation of granulosa cells.
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Affiliation(s)
- Yinghua Yang
- Laboratory of Theriogenology, Department of Veterinary Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, 060-0818, Japan.
| | - Chihiro Kanno
- Laboratory of Theriogenology, Department of Veterinary Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, 060-0818, Japan.
| | - Weiping Huang
- Laboratory of Theriogenology, Department of Veterinary Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, 060-0818, Japan.
| | - Sung-Sik Kang
- Laboratory of Theriogenology, Department of Veterinary Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, 060-0818, Japan.
| | - Yojiro Yanagawa
- Laboratory of Theriogenology, Department of Veterinary Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, 060-0818, Japan.
| | - Masashi Nagano
- Laboratory of Theriogenology, Department of Veterinary Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, 060-0818, Japan.
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Huang W, Kang SS, Nagai K, Yanagawa Y, Takahashi Y, Nagano M. Mitochondrial activity during pre-maturational culture in in vitro-grown bovine oocytes is related to maturational and developmental competences. Reprod Fertil Dev 2016; 28:349-56. [DOI: 10.1071/rd14023] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Accepted: 06/05/2014] [Indexed: 11/23/2022] Open
Abstract
The objective of this study was to investigate the dynamics of mitochondrial activity in in vitro-grown (IVG) bovine oocytes during pre-maturational culture (pre-IVM) and its relationship to their developmental competence upon being subjected to different pre-IVM durations. After 12-day IVG culture, oocytes were cultured for 0, 10 or 20 h with 3-isobutyl-1-methylxanthine (IBMX) as pre-IVM. Mitochondrial activity in IVG oocytes after 10 h pre-IVM was the highest among all the pre-IVM durations (P < 0.05). In addition, cleavage (79.4%) and blastocyst rates (38.9%) of embryos derived from IVG oocytes with 10 h pre-IVM were higher than those with 20 h pre-IVM (63.0 and 25.8%, respectively; P < 0.05) and similar to those of in vivo-grown oocytes (82.7 and 36.7%, respectively). To confirm the developmental ability of IVG oocytes with 10 h pre-IVM beyond the blastocyst stage in vivo, embryo transfer was attempted. Transferred embryos developed to the elongated embryonic stage (63.6%, 7/11) in the recipient uterus at Day 16 of oestrus, and a male calf was delivered (50%, 1/2). In conclusion, it was indicated that the mitochondrial activity of bovine IVG oocytes peaked at 10 h pre-IVM and was closely correlated with the nuclear maturation and developmental competences of IVG oocytes.
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Morohaku K, Hirao Y, Obata Y. Developmental competence of oocytes grown in vitro: Has it peaked already? J Reprod Dev 2015; 62:1-5. [PMID: 26685717 PMCID: PMC4768772 DOI: 10.1262/jrd.2015-148] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In vitro growth of immature oocytes provides opportunities to increase gametic resources and
to understand the mechanisms underlying oocyte development. Many studies on the in vitro
growth of oocytes have been reported thus far; however, only a few cases have been reported, which
demonstrated that oocytes can support full-term development after in vitro fertilization. Our
research group recently found that culture of mouse neonatal primordial follicles increased the birthrate;
however, the establishment of an in vitro system that can completely mimic follicle or oocyte
growth in vivo and control oogenesis remains an ongoing challenge.
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Affiliation(s)
- Kanako Morohaku
- Department of Bioscience, Tokyo University of Agriculture, Tokyo 156-8502, Japan
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Sugiyama M, Kawahara-Miki R, Kawana H, Shirasuna K, Kuwayama T, Iwata H. Resveratrol-induced mitochondrial synthesis and autophagy in oocytes derived from early antral follicles of aged cows. J Reprod Dev 2015; 61:251-9. [PMID: 25866375 PMCID: PMC4547982 DOI: 10.1262/jrd.2015-001] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Mitochondrial numbers increase during oocyte growth. In this study, we collected oocytes and granulosa cell complexes (OGCs) from early antral follicles (EAFs) of aged cows (> 120 months of age) and examined the effects of resveratrol on mitochondrial generation, degradation, and quality in oocytes grown in vitro. We also examined the effects of resveratrol on gene expression of the granulosa cells. Resveratrol (20 µM) enhanced the expression of SIRT1 and induced autophagy in both granulosa cells and oocytes derived from aged cows. Culturing the OGCs with resveratrol increased mitochondrial DNA copy numbers in oocytes grown in vitro. Furthermore, resveratrol increased the ATP content in oocytes and improved the developmental ability of the oocytes to the blastocyst stage. Gene expression profiles in granulosa cells, as evaluated by next-generation sequencing technology, revealed that resveratrol enhanced the expression of EIF2-related
genes but downregulated the expression of mammalian target of rapamycin (mTOR)-, inflammation-, and cholesterol homeostasis-related genes in granulosa cells. In conclusion, resveratrol affected both oocytes and granulosa cells derived from aged cows and improved the quality of oocytes grown in vitro through upregulation of mitochondrial biogenesis and degradation in growing oocytes and conditioning of granulosa cells.
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Affiliation(s)
- Miyako Sugiyama
- Department of Animal Science, Tokyo University of Agriculture, Kanagawa 243-0034, Japan
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Makita M, Miyano T. Androgens promote the acquisition of maturation competence in bovine oocytes. J Reprod Dev 2015; 61:211-7. [PMID: 25754240 PMCID: PMC4498369 DOI: 10.1262/jrd.2014-161] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Recent studies in mice suggest that androgens are important for normal follicle development. However, there have been few reports concerning the action of androgens in the growth of oocytes from large animals. The purpose of this study was to determine the roles of androgens in bovine oocyte growth in vitro. Oocyte-granulosa cell complexes (OGCs) collected from 0.4-0.7 mm early antral follicles were cultured for 14 days with 17β-estradiol (E2) and a non-aromatizable androgen, dihydrotestosterone (DHT). We also examined the ability of an androgen receptor (AR) inhibitor, hydroxyflutamide, to antagonize the effect of androgens on the oocytes. During growth culture, the OGC structures collapsed in the medium with DHT alone, while in the presence of E2, the OGC structures were maintained. In the medium with both androgens and E2, the mean diameter of oocytes was increased from 95 μm to around 120 μm, larger than those grown with E2 alone (115 μm). Also in the maturation culture, oocytes grown with androgens (A4 or DHT) and E2 showed higher percentages of metaphase II oocytes (63% or 69%, respectively) than those grown with E2 alone (32%). Moreover, these maturation rates were decreased by hydroxyflutamide in a dose-dependent manner. Immunostaining showed that ARs were expressed in oocytes and granulosa cells in early antral follicles, and the nuclei of granulosa cells showed intense AR expression. In conclusion, although E2 supports the OGC structure, additional androgens promote oocyte growth and their acquisition of meiotic competence via AR during in vitro growth culture.
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Affiliation(s)
- Miho Makita
- Graduate School of Agricultural Science, Kobe University, Kobe 657-8501, Japan
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Itami N, Shirasuna K, Kuwayama T, Iwata H. Resveratrol improves the quality of pig oocytes derived from early antral follicles through sirtuin 1 activation. Theriogenology 2015; 83:1360-7. [PMID: 25724287 DOI: 10.1016/j.theriogenology.2015.01.029] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Revised: 01/21/2015] [Accepted: 01/24/2015] [Indexed: 12/21/2022]
Abstract
During oocyte growth, the number of mitochondria drastically increases and mitochondrial function profoundly affects the oocyte competence. Resveratrol is a well-known activator of sirtuin 1 (SIRT1), which has a role in cellular energy homeostasis and mitochondrial biogenesis. The main aim of the present study was to examine the effect of supplementation of culture media with resveratrol on oocyte development and mitochondrial number and functions. Lipid contents and developmental ability of the oocytes grown in vitro were also examined. Oocyte-granulosa cell complexes were collected from early antral follicles of gilt ovaries and were cultured in medium containing 0 or 2 μM resveratrol for 14 days. Immunostaining revealed that resveratrol enhanced SIRT1 expression in oocytes. Antrum formation during the culture period and survivability of the granulosa cells surrounding the developed oocytes did not differ between the two concentrations of resveratrol. In addition, the ability of oocytes to complete meiotic maturation did not differ between the two concentrations of resveratrol, whereas the ability of oocytes to develop to the blastocyst stage was improved significantly by resveratrol (7.4% vs. 1.6%; P < 0.05). Resveratrol upregulated the ATP content in oocytes grown in vitro, and the addition of 2 μM of the SIRT1 inhibitor 6-Chloro-2,3,4,9-tetrahydro-1H-carbazole-1-carboxamide (EX527) diminished this effect although EX527 alone had no effect on ATP content. The mitochondrial DNA copy number in oocytes determined by quantitative real-time polymerase chain reaction increased during in vitro oocyte development, but resveratrol did not affect the kinetics of the mitochondrial DNA copy number. We found that resveratrol also increased the expression level of phospho-5'-adenosine monophosphate-activated protein kinase in oocytes but decreased the lipid content in oocytes grown in vitro. These results suggest that resveratrol increased the ATP content in oocytes via energy homeostasis and improved the developmental ability of oocytes grown in vitro.
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Affiliation(s)
- N Itami
- Department of Animal Reproduction, Tokyo University of Agriculture, Atsugi City, Kanagawa, Japan
| | - K Shirasuna
- Department of Animal Reproduction, Tokyo University of Agriculture, Atsugi City, Kanagawa, Japan
| | - T Kuwayama
- Department of Animal Reproduction, Tokyo University of Agriculture, Atsugi City, Kanagawa, Japan
| | - H Iwata
- Department of Animal Reproduction, Tokyo University of Agriculture, Atsugi City, Kanagawa, Japan.
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Kubo N, Cayo-Colca IS, Miyano T. Effect of estradiol-17β during in vitro growth culture on the growth, maturation, cumulus expansion and development of porcine oocytes from early antral follicles. Anim Sci J 2014; 86:251-9. [PMID: 25410821 DOI: 10.1111/asj.12283] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Accepted: 06/19/2014] [Indexed: 11/29/2022]
Abstract
Growing porcine oocytes from early antral follicles can acquire meiotic and developmental competence under suitable culture conditions, but at lower rates compared to full-grown oocytes. We postulated that estradiol-17β (E2 ) supported the acquisition of meiotic and developmental competence as well as cumulus-expansion ability during growth culture. Growing oocytes from early antral follicles (1.2 to 1.5 mm in diameter) were grown in vitro for 5 days in a medium containing 0, 10(-7) , 10(-6) , 10(-5) or 10(-4) mol/L E2 ; after in vitro maturation, 35, 58, 47, 74 and 49% of oocytes matured to metaphase II, 25, 79, 77, 90 and 97% acquired cumulus-expansion ability, and 23, 54, 63, 89 and 64% were fully surrounded by cumulus cells, respectively. Following maturation, electro-stimulation was applied to the oocytes grown with 10(-5) mol/L E2 . After 6 days of culture, in vitro-grown oocytes developed to the blastocyst stage at a rate similar to that for full-grown oocytes (31% and 40%, respectively). Therefore, we suggest that the use of E2 during growth culture improves the meiotic and developmental competence of oocytes, cumulus-expansion ability, and cumulus cell attachment to the oocytes.
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Affiliation(s)
- Naoko Kubo
- Graduate School of Agricultural Science, Kobe University, Kobe, Japan
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Makita M, Miyano T. Steroid hormones promote bovine oocyte growth and connection with granulosa cells. Theriogenology 2014; 82:605-12. [PMID: 24985562 DOI: 10.1016/j.theriogenology.2014.05.020] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2013] [Revised: 05/18/2014] [Accepted: 05/24/2014] [Indexed: 11/17/2022]
Abstract
Many approaches have been investigated for growing oocytes in vitro in mammals. To support oocyte growth in vitro, the culture systems must meet certain conditions for maintaining connections between oocytes and surrounding granulosa cells. The aims of this study were to determine the effects of combinations of 17β-estradiol (E2) and androstenedione (A4) on in vitro growth of bovine oocytes and to determine the number of connections between the oocyte and granulosa cells. Oocyte-granulosa cell complexes (OGCs) collected from early antral follicles (0.4-0.7 mm in diameter) were cultured for 14 days in a medium with different concentrations of E2 and A4, either alone or in combinations. We then assessed the number of transzonal projections (TZPs), which extend from granulosa cells through the zona pellucida to the oolemma. During in vitro growth culture, OGC structures were maintained in the medium with steroid hormones. The mean diameter of oocytes grown in the medium with both E2 and A4 was increased from 95.8 μm to around 120 μm, larger than oocytes grown without steroid hormones (109.9 μm) and similar in size to in vivo fully grown oocytes (119.4 μm) from 4- to 6-mm antral follicles. In subsequent in vitro maturation culture (22 hours), 30% (12 of 40) and 34% (14 of 41) of oocytes grown with E2 or A4 alone, respectively, matured to metaphase II; meanwhile, oocytes grown with a combination of E2 and A4 matured to metaphase II at a high rate (58%, 23 of 40). Growing oocytes isolated from early antral follicles had many uniformly distributed TZPs throughout the zona pellucida. After 14 days of culture, there was a significant decrease in the number of TZPs in oocytes grown without steroid hormones, whereas the number of TZPs was maintained in oocytes grown with steroid hormones. In particular, oocytes grown with E2 alone or with a combination of E2 and A4 had numbers of TZPs similar to oocytes before growth culture. In conclusion, a combination of E2 and A4 maintained the connections between oocytes and granulosa cells during in vitro growth culture of bovine oocytes for 14 days, resulting in the complete oocyte growth and the acquisition of meiotic competence in more than half the oocytes.
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Affiliation(s)
- Miho Makita
- Department of Bioresource Science, Graduate School of Agricultural Science, Kobe University, Kobe, Japan.
| | - Takashi Miyano
- Department of Bioresource Science, Graduate School of Agricultural Science, Kobe University, Kobe, Japan
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