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Nakao S, Ito K, Sugahara C, Watanabe H, Kondoh G, Nakagata N, Takeo T. Synchronization of the ovulation and copulation timings increased the number of in vivo fertilized oocytes in superovulated female mice. PLoS One 2023; 18:e0281330. [PMID: 36745586 PMCID: PMC9901804 DOI: 10.1371/journal.pone.0281330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Accepted: 01/20/2023] [Indexed: 02/07/2023] Open
Abstract
The number of sperm that reaches the oocytes in mammalian species is limited. In mice, 8-10 oocytes are ovulated, a similar number of sperm reaches the oocytes, and nearly all oocytes are fertilized via natural mating. Meanwhile, our improved superovulation technique (ultrasuperovulation: administration of inhibin antiserum and equine chorionic gonadotropin [IASe]) produced 100 oocytes from a single female C57BL/6 mouse but resulted in only approximately 20 fertilized oocytes via mating. We hypothesized that sperm shortage in the ampulla might cause this low fertilization rate. Mice were mated in the proestrus stage or after hormone injection, but ovulation timing was not considered. In clinical application, the rhythm method supports fertilization by testing the ovulation period and synchronizing the ovulation and copulation timings. Therefore, this study examined the effects of ovulation and copulation timings on in vivo fertilization in female mice with IASe. Synchronization of the ovulation and copulation timings increased fertilization efficiency in female mice with ultrasuperovulation. The number of embryos obtained post ovulation was three times higher than that obtained pre ovulation. This study suggests that synchronized ovulation and copulation timings improve the efficiency of in vivo fertilization in IASe-treated female mice. This technique can be used to produce genetically modified mice and develop technologies for infertility treatment.
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Affiliation(s)
- Satohiro Nakao
- Division of Reproductive Engineering, Center for Animal Resources and Development, Kumamoto University, Kumamoto, Japan
| | - Kotono Ito
- Division of Reproductive Engineering, Center for Animal Resources and Development, Kumamoto University, Kumamoto, Japan
| | - Chihiro Sugahara
- Division of Reproductive Engineering, Center for Animal Resources and Development, Kumamoto University, Kumamoto, Japan
| | - Hitomi Watanabe
- Laboratory of Integrative Biological Science, Institute for Life and Medical Sciences, Kyoto University, Kyoto, Japan
| | - Gen Kondoh
- Laboratory of Integrative Biological Science, Institute for Life and Medical Sciences, Kyoto University, Kyoto, Japan
| | - Naomi Nakagata
- Division of Reproductive Biotechnology and Innovation, Center for Animal Resources and Development, Kumamoto University, Kumamoto, Japan
| | - Toru Takeo
- Division of Reproductive Engineering, Center for Animal Resources and Development, Kumamoto University, Kumamoto, Japan
- * E-mail:
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2
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Delerue F, Ittner LM. Microinjection of Zygotes for CRISPR/Cas9-Mediated Insertion of Transgenes into the Murine Rosa26 Safe Harbor. Methods Mol Biol 2022; 2495:115-128. [PMID: 35696031 DOI: 10.1007/978-1-0716-2301-5_7] [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] [Indexed: 06/15/2023]
Abstract
Genetically modified (GM) mice are widely used in biomedical research because they can address complex questions in an in-vivo setting that could not otherwise be addressed in-vitro. Microinjection of zygotes remains the most common technique to generate GM animals to date. Here, we describe the targeted insertion (knock-in) of transgenes by microinjection of 1-cell or 2-cell stage embryos into the murine Rosa26 safe harbor.
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Affiliation(s)
- Fabien Delerue
- Genome Editing at Macquarie (GEM), Dementia Research Centre, Macquarie University, Sydney, NSW, Australia.
| | - Lars M Ittner
- Genome Editing at Macquarie (GEM), Dementia Research Centre, Macquarie University, Sydney, NSW, Australia
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3
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Zhao X, Huang JX, Zhang H, Gong X, Dong J, Ren HL, Liu Z. A comparison study of superovulation strategies for C57BL/6J and B6D2F1 mice in CRISPR-Cas9 mediated genome editing. Reprod Fertil Dev 2021; 33:772-781. [PMID: 34748725 DOI: 10.1071/rd21199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Accepted: 08/12/2021] [Indexed: 11/23/2022] Open
Abstract
Reproductive techniques such as superovulation and in vitro fertilisation (IVF) have been widely used in generating genetically modified animals. The current gold standard for superovulation in mice is using coherent treatments of equine chorionic gonadotropin (eCG) and human chorionic gonadotropin (hCG). An alternative method using inhibin antiserum (IAS) instead of eCG has been recently reported. Here, we evaluate different superovulation strategies in C57BL/6J and B6D2F1 mice. Firstly, we found that using 5-week-old C57BL/6J and 4-week-old B6D2F1 donors could achieve better superovulation outcomes. Then, we compared eCG-hCG, IAS-hCG and eCG-IAS-hCG with different dosages in both mouse strains. Significantly increased numbers of oocytes were obtained by using IAS-hCG and eCG-IAS-hCG methods. However, low fertilisation rates (36.3-38.8%) were observed when natural mating was applied. We then confirmed that IVF could dramatically ameliorate the fertilisation rates up to 89.1%. Finally, we performed CRISPR-Cas9 mediated genome editing targeting Scn11a and Kcnh1 loci, and successfully obtained mutant pups using eCG-hCG and IAS-hCG induced zygotes, which were fertilised by either natural mating or IVF. Our results showed that IAS is a promising superovulation reagent, and the efficiency of genome editing is unlikely to be affected by using IAS-induced zygotes.
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Affiliation(s)
- Xue Zhao
- School of Life Science and Technology, Weifang Medical University, Weifang, Shandong 261053, China
| | - Johnny X Huang
- School of Life Science and Technology, Weifang Medical University, Weifang, Shandong 261053, China; and Institute for Molecular Bioscience, The University of Queensland, Brisbane, Qld 4072, Australia
| | - Hailong Zhang
- School of Life Science and Technology, Weifang Medical University, Weifang, Shandong 261053, China
| | - Xueyang Gong
- School of Life Science and Technology, Weifang Medical University, Weifang, Shandong 261053, China
| | - Jinhua Dong
- School of Life Science and Technology, Weifang Medical University, Weifang, Shandong 261053, China
| | - Hong-Lin Ren
- Key Laboratory of Zoonosis Research, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Xi An Da Lu 5333, Changchun 130062, China
| | - Zengshan Liu
- School of Life Science and Technology, Weifang Medical University, Weifang, Shandong 261053, China; and Key Laboratory of Zoonosis Research, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Xi An Da Lu 5333, Changchun 130062, China
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Nishizono H, Hayano Y, Nakahata Y, Ishigaki Y, Yasuda R. Rapid generation of conditional knockout mice using the CRISPR-Cas9 system and electroporation for neuroscience research. Mol Brain 2021; 14:148. [PMID: 34556164 PMCID: PMC8461926 DOI: 10.1186/s13041-021-00859-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2021] [Accepted: 09/13/2021] [Indexed: 11/10/2022] Open
Abstract
The Cre/LoxP-based conditional knockout technology is a powerful tool for gene function analysis that allows region- and time-specific gene manipulation. However, inserting a pair of LoxP cassettes to generate conditional knockout can be technically challenging and thus time- and resource-consuming. This study proposes an efficient, low-cost method to generate floxed mice using in vitro fertilization and the CRISPR-Cas9 system over two consecutive generations. This method allowed us to produce floxed mice targeting exons 5 and 6 of CaMK1 in a short period of 125 days, using only 16 mice. In addition, we directly edited the genome of fertilized eggs of mice with our target genetic background, C57BL/6 N, to eliminate additional backcrossing steps. We confirmed that the genome of the generated floxed mice was responsive to the Cre protein. This low-cost, time-saving method for generating conditional knockout will facilitate comprehensive, tissue-specific genome analyses.
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Affiliation(s)
- Hirofumi Nishizono
- Medical Research Institute, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Ishikawa, 920-0293, Japan.
- Max Planck Florida Institute for Neuroscience, 1 Max Planck Way, Jupiter, FL, 33458, USA.
| | - Yuki Hayano
- Max Planck Florida Institute for Neuroscience, 1 Max Planck Way, Jupiter, FL, 33458, USA
| | - Yoshihisa Nakahata
- Max Planck Florida Institute for Neuroscience, 1 Max Planck Way, Jupiter, FL, 33458, USA
| | - Yasuhito Ishigaki
- Medical Research Institute, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Ishikawa, 920-0293, Japan
| | - Ryohei Yasuda
- Max Planck Florida Institute for Neuroscience, 1 Max Planck Way, Jupiter, FL, 33458, USA.
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Tsuchida M, Sakurai D, Komura N, Nakagata N, Suzuki H. Induction of oestrus by administering Inhibin antiserum along with equine chorionic gonadotropin in anoestrous bitches. Reprod Domest Anim 2021; 56:1398-1405. [PMID: 34388283 DOI: 10.1111/rda.14004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Accepted: 08/09/2021] [Indexed: 11/28/2022]
Abstract
As dogs experience oestrus only once or twice a year, it is necessary to establish an effective method of oestrous induction for efficient breeding. In the present study, we evaluated inhibin antiserum (IAS) on oestrous induction in anoestrous females. Bitches were administered 0.5 ml/kg IAS or a mixture of 50 IU/kg equine chorionic gonadotropin (eCG) and 0.5 ml/kg IAS and 500 IU human chorionic gonadotropin (hCG) administered 7 days after the mixture injection. As a control, bitches received 50 IU/kg eCG, with 500 IU hCG administered 7 days after eCG injection. Blood-tinged vaginal discharge, vulvar swelling, plasma progesterone concentrations and ovarian follicular development were assessed from day 0 to day 14. IAS alone injection did not induce oestrus in bitches at the anoestrous stage. Conversely, vulvar swelling, blood-tinged vaginal discharge and an estimated luteinizing hormone (LH) surge appeared on days 3-7, days 3-6 and days 7-9 after the IAS+eCG mixture injection, respectively, in all five bitches at the anoestrous stage. The average number of developing and ovulated follicles in bitches administered IAS+eCG was 8.8 and 9.6 respectively. A single eCG injection followed by hCG induced oestrous signs, with an average of 8.3 developing follicles and 4.5 ovulated follicles. This study revealed that IAS alone did not induce oestrus, but when IAS was used in combination with eCG, it induced oestrus and promoted a considerable number of ovulations in anoestrous dogs.
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Affiliation(s)
- Mei Tsuchida
- Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Japan
| | - Daichi Sakurai
- Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Japan
| | - Nako Komura
- Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Japan
| | | | - Hiroshi Suzuki
- Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Japan
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Wuri L, Agca C, Agca Y. Morphometric, subcellular, in vitro fertilisation and embryonic developmental assessment of mouse oocytes produced by anti-inhibin serum or pregnant mare serum gonadotrophin superovulation. Reprod Fertil Dev 2021; 32:474-483. [PMID: 31972126 DOI: 10.1071/rd19131] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2019] [Accepted: 08/01/2019] [Indexed: 11/23/2022] Open
Abstract
This study compared the morphometric, subcellular characteristics, in vitro fertilisation (IVF) and embryonic developmental potential of metaphase II (MII) mouse oocytes obtained from females superovulated with either anti-inhibin serum-human chorionic gonadotrophin (AIS-hCG) or pregnant mare serum gonadotrophin (PMSG)-hCG. The oocyte's quantity, quality, zona pellucida (ZP) thickness, perivitelline space (PVS), diameter, microtubules, F-actin, cortical granules (CGs) and mitochondrial distribution were determined. Superovulation using AIS-hCG resulted in a higher numbers of oocyte/donor compared with PMSG-hCG (P=0.002). There was no difference in morphologically normal and abnormal oocytes between AIS-hCG and PMSG-hCG (P=0.425 and P=0.194, respectively). The morphometric measurements showed no difference in oocyte diameter between AIS-hCG and PMSG-hCG (P=0.289). However, the thickness of the ZP of oocytes from AIS-hCG females was decreased compared with PMSG-hCG (P<0.001). The PVS of oocytes from the AIS-hCG was larger than with PMSG-hCG (P<0.001). The microtubules of oocytes from both AIS-hCG and PMSG-hCG were normal, although there was an increased fluorescence intensity in the AIS-hCG oocytes (P<0.001). The F-actin and CGs distribution in oocytes from both AIS-hCG and PMSG-hCG were similar (P=0.330 and P=0.13, respectively). Although the oocytes from PMSG-hCG females had homogenously distributed mitochondria, AIS-hCG oocytes showed more peripheral distribution with no differences in fluorescence intensity (P=0.137). The blastocyst development rates after IVF with fresh sperm showed no difference between AIS-hCG and PMSG-hCG (P=0.235). These data suggested that AIS-hCG superovulation produces high numbers of morphologically normal oocytes that also possess normal subcellular structures, good morphological characteristics and had high invitro embryonic developmental potential.
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Affiliation(s)
- Liga Wuri
- Division of Animal Sciences, University of Missouri, 920 East Campus Drive, Columbia, MO 65201, USA
| | - Cansu Agca
- College of Veterinary Medicine, University of Missouri, 1600 East Rollins Street, Columbia, MO 65211, USA
| | - Yuksel Agca
- Division of Animal Sciences, University of Missouri, 920 East Campus Drive, Columbia, MO 65201, USA; and College of Veterinary Medicine, University of Missouri, 1600 East Rollins Street, Columbia, MO 65211, USA; and Corresponding author.
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Takeo T, Nakao S, Nakagawa Y, Sztein JM, Nakagata N. Cryopreservation of mouse resources. Lab Anim Res 2020; 36:33. [PMID: 32963977 PMCID: PMC7495967 DOI: 10.1186/s42826-020-00066-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Accepted: 09/10/2020] [Indexed: 01/19/2023] Open
Abstract
The cryopreservation of sperm and embryos is useful to efficiently archive valuable resources of genetically engineered mice. Till date, more than 60,000 strains of genetically engineered mice have been archived in mouse banks worldwide. Researchers can request for the archived mouse strains for their research projects. The research infrastructure of mouse banks improves the availability of mouse resources, the productivity of research projects, and the reproducibility of animal experiments. Our research team manages the mouse bank at the Center for Animal Resources and Development in Kumamoto University and continuously develops new techniques in mouse reproductive technology to efficiently improve the system of mouse banking. In this review, we introduce the activities of mouse banks and the latest techniques used in mouse reproductive technology.
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Affiliation(s)
- Toru Takeo
- Division of Reproductive Engineering, Center for Animal Resources and Development, Institute of Resource Development and Analysis, Kumamoto University, 2-2-1 Honjo, Kumamoto, 860-0811 Japan
| | - Satohiro Nakao
- Division of Reproductive Engineering, Center for Animal Resources and Development, Institute of Resource Development and Analysis, Kumamoto University, 2-2-1 Honjo, Kumamoto, 860-0811 Japan
| | - Yoshiko Nakagawa
- Division of Reproductive Engineering, Center for Animal Resources and Development, Institute of Resource Development and Analysis, Kumamoto University, 2-2-1 Honjo, Kumamoto, 860-0811 Japan
| | - Jorge M Sztein
- Division of Reproductive Engineering, Center for Animal Resources and Development, Institute of Resource Development and Analysis, Kumamoto University, 2-2-1 Honjo, Kumamoto, 860-0811 Japan
| | - Naomi Nakagata
- Division of Reproductive Biotechnology and Innovation, Center for Animal Resources and Development, Institute of Resource Development and Analysis, Kumamoto University, Kumamoto, Japan
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8
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Goto M, Takeo T, Takahashi R, Nakagata N. Efficient production of immunodeficient non-obese diabetic/Shi-scid IL2rγnull mice via the superovulation technique using inhibin antiserum and gonadotropin. Lab Anim 2020; 55:13-20. [PMID: 32507045 DOI: 10.1177/0023677220928091] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Severe immunodeficient mice are an essential tool for the examination of the efficacy and safety of new therapeutic technologies as a humanized model. Previously, non-obese diabetic (NOD)/Shi-scid IL2rγnull (NOG) mice were established as immunodeficient mice by combining interleukin-2 receptor-γ chain-knockout mice and NOD/Shi-scid mice. The NOG mice are used frequently in the research of therapeutic monoclonal antibodies and regenerative medicine for human diseases. Establishment of an efficient production system of NOG mice, using optimized reproductive techniques, is required to accelerate research. In this study, we investigated the efficacy of the superovulation technique using equine chorionic gonadotropin (eCG) and inhibin antiserum (IAS) in NOG mice of various ages (4, 8, 12, 24, or 54 weeks). Additionally, we examined the fertilizing and developmental ability of the oocytes through in-vitro fertilization using frozen-thawed sperm, embryo culture and embryo transfer. The results showed that NOG mice produced the highest number of oocytes at 12 weeks old following the co-administration of eCG and IAS (collectively IASe) (70 oocytes/female). IASe was more effective in increasing the number of oocytes v. eCG at all ages. The IASe-derived oocytes demonstrated the ability to fertilize and develop into blastocysts and pups. Finally, we demonstrated that three strains of genetically modified NOG mice were efficiently produced through the optimized reproductive techniques. In summary, we developed an efficient system for the production of immunodeficient mice using 12-week-old, IASe-treated female NOG mice.
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Affiliation(s)
- Motohito Goto
- 13565Central Institute for Experimental Animals (CIEA), Japan.,Center for Animal Resources and Development (CARD), Kumamoto University, Japan
| | - Toru Takeo
- Center for Animal Resources and Development (CARD), Kumamoto University, Japan
| | | | - Naomi Nakagata
- Center for Animal Resources and Development (CARD), Kumamoto University, Japan
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Emmer BT, Lascuna PJ, Tang VT, Kotnik EN, Saunders TL, Khoriaty R, Ginsburg D. Murine Surf4 is essential for early embryonic development. PLoS One 2020; 15:e0227450. [PMID: 31978056 PMCID: PMC6980569 DOI: 10.1371/journal.pone.0227450] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Accepted: 12/18/2019] [Indexed: 12/12/2022] Open
Abstract
Newly synthesized proteins co-translationally inserted into the endoplasmic reticulum (ER) lumen may be recruited into anterograde transport vesicles by their association with specific cargo receptors. We recently identified a role for the cargo receptor SURF4 in facilitating the secretion of PCSK9 in cultured cells. To examine the function of SURF4 in vivo, we used CRISPR/Cas9-mediated gene editing to generate mice with germline loss-of-function mutations in Surf4. Heterozygous Surf4+/- mice exhibit grossly normal appearance, behavior, body weight, fecundity, and organ development, with no significant alterations in circulating plasma levels of PCSK9, apolipoprotein B, or total cholesterol, and a detectable accumulation of intrahepatic apoliprotein B. Homozygous Surf4-/- mice exhibit embryonic lethality, with complete loss of all Surf4-/- offspring between embryonic days 3.5 and 9.5. In contrast to the milder murine phenotypes associated with deficiency of known SURF4 cargoes, the embryonic lethality of Surf4-/- mice implies the existence of additional SURF4 cargoes or functions that are essential for murine early embryonic development.
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Affiliation(s)
- Brian T. Emmer
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan
- Life Sciences Institute, University of Michigan, Ann Arbor, Michigan
| | - Paul J. Lascuna
- Life Sciences Institute, University of Michigan, Ann Arbor, Michigan
| | - Vi T. Tang
- Life Sciences Institute, University of Michigan, Ann Arbor, Michigan
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, Michigan
| | - Emilee N. Kotnik
- Life Sciences Institute, University of Michigan, Ann Arbor, Michigan
| | - Thomas L. Saunders
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan
- Transgenic Animal Model Core Laboratory, University of Michigan, Ann Arbor, Michigan
- University of Michigan Rogel Cancer Center, Ann Arbor, Michigan
| | - Rami Khoriaty
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan
- University of Michigan Rogel Cancer Center, Ann Arbor, Michigan
- Cellular and Molecular Biology Program, University of Michigan, Ann Arbor, Michigan
- Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, Michigan
| | - David Ginsburg
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan
- Life Sciences Institute, University of Michigan, Ann Arbor, Michigan
- University of Michigan Rogel Cancer Center, Ann Arbor, Michigan
- Cellular and Molecular Biology Program, University of Michigan, Ann Arbor, Michigan
- Department of Human Genetics, University of Michigan, Ann Arbor, Michigan
- Department of Pediatrics, University of Michigan, Ann Arbor, Michigan
- Howard Hughes Medical Institute, University of Michigan, Ann Arbor, Michigan
- * E-mail:
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Abstract
Cryobanking of sperm, oocytes, and embryos is a useful means to efficiently maintain mouse colonies without breeding live animals. Cryopreserved cells can be permanently stored in well-managed systems in liquid nitrogen tanks at -196 °C and quickly reanimated for use via in vitro fertilization and/or embryo transfer. Recent improvements of reproductive technology markedly enhanced the efficiency of recovering and producing animals using cryopreserved cells. The establishment of a cryobanking system will increase the performance of animal experiments, meet the principles of 3Rs (replacement, reduction, and refinement), and reduce labour and costs. In this chapter, we described the latest techniques of sperm cryopreservation, in vitro fertilization, and oocyte and two-cell embryo vitrification developed at the Center for Animal Resources and Development (CARD).
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Affiliation(s)
- Toru Takeo
- Division of Reproductive Engineering, Center for Animal Resources and Development (CARD), Kumamoto University, Chuo-ku, Kumamoto-shi, Japan.
| | - Naomi Nakagata
- Division of Reproductive Engineering, Center for Animal Resources and Development (CARD), Kumamoto University, Chuo-ku, Kumamoto-shi, Japan
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Nakagata N, Takeo T. Basic mouse reproductive techniques developed and modified at the Center for Animal Resources and Development (CARD), Kumamoto University. Exp Anim 2019; 68:391-395. [PMID: 31243193 PMCID: PMC6842795 DOI: 10.1538/expanim.19-0070] [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: 01/30/2023] Open
Abstract
The Center for Animal Resources and Development (CARD), Kumamoto University was
established in 1998. We provide advanced research support services for the mouse-based
biomedical research community via an official and a premium mouse bank system. To
efficiently manage these mouse banks, we have actively developed and modified basic mouse
reproductive techniques. We shall introduce these techniques in this paper.
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Affiliation(s)
- Naomi Nakagata
- Division of Reproductive Engineering, Center for Animal Resources and Development (CARD), Kumamoto University, 2-2-1 Honjo, Chuo-ku, Kumamoto 860-0811, Japan
| | - Toru Takeo
- Division of Reproductive Engineering, Center for Animal Resources and Development (CARD), Kumamoto University, 2-2-1 Honjo, Chuo-ku, Kumamoto 860-0811, Japan
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12
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Mukunoki A, Takeo T, Nakagata N. N-acetyl cysteine restores the fertility of vitrified-warmed mouse oocytes derived through ultrasuperovulation. PLoS One 2019; 14:e0224087. [PMID: 31639156 PMCID: PMC6804996 DOI: 10.1371/journal.pone.0224087] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Accepted: 10/05/2019] [Indexed: 01/22/2023] Open
Abstract
Oocyte cryopreservation is useful for preserving fertility and storing genetic resources. However, the small number of oocytes acquired using conventional treatment to induce superovulation and the reduction of fertility due to cryopreservation represent significant problems. Herein, we vitrified the oocytes derived through high-yield superovulation using inhibin antiserum and equine chorionic gonadotropin (IAS + eCG: IASe) and examined the yield of cryopreserved oocytes and survival rates relative to those of vitrified–warmed mouse oocytes derived through conventional superovulation using equine chorionic gonadotropin (eCG). Furthermore, we investigated the effects of N-acetyl cysteine on the fertility and developmental potential of vitrified–warmed oocytes derived using IASe. Compared with eCG, IASe increased the yield of cryopreserved oocytes and achieved equivalent survival rates. N-acetyl cysteine (0.5 mM) increased the fertilization rate of vitrified–warmed oocytes derived using IASe. Vitrification decreased thiol levels in the zona pellucida (ZP), while warming followed by N-acetyl cysteine treatment increased free thiol levels in ZP. Moreover, N-acetyl cysteine treatment recovered zona hardening by cleaving disulfide bonds and promoting the expansion of ZP. Two-cell embryos derived via in vitro fertilization using N-acetyl cysteine developed into normal pups through embryo transfer. Therefore, we developed an efficient technique for the production of cryopreserved oocytes using IASe through superovulation and found that N-acetyl cysteine improves the fertility of vitrified–warmed oocytes by cleaving the disulfide bonds and promoting the expansion of ZP.
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Affiliation(s)
- Ayumi Mukunoki
- Division of Reproductive Engineering, Center for Animal Resources and Development, Kumamoto University, Honjo, Chuo-ku, Kumamoto, Japan
| | - Toru Takeo
- Division of Reproductive Engineering, Center for Animal Resources and Development, Kumamoto University, Honjo, Chuo-ku, Kumamoto, Japan
| | - Naomi Nakagata
- Division of Reproductive Engineering, Center for Animal Resources and Development, Kumamoto University, Honjo, Chuo-ku, Kumamoto, Japan
- * E-mail:
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13
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Takeo T, Mukunoki A, Nakagata N. Ovulation of juvenile, mature, and aged female C57BL/6 mice following coadministration of inhibin antiserum and equine chorionic gonadotropin. Theriogenology 2019; 135:1-6. [DOI: 10.1016/j.theriogenology.2019.05.028] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 05/27/2019] [Accepted: 05/29/2019] [Indexed: 02/02/2023]
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