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Yamatoya K, Kurosawa M, Hirose M, Miura Y, Taka H, Nakano T, Hasegawa A, Kagami K, Yoshitake H, Goto K, Ueno T, Fujiwara H, Shinkai Y, Kan FWK, Ogura A, Araki Y. The fluid factor OVGP1 provides a significant oviductal microenvironment for the reproductive process in golden hamster†. Biol Reprod 2024; 110:465-475. [PMID: 37995271 PMCID: PMC10941085 DOI: 10.1093/biolre/ioad159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 08/23/2023] [Accepted: 11/14/2023] [Indexed: 11/25/2023] Open
Abstract
The mammalian oviductal lumen is a specialized chamber that provides an environment that strictly regulates fertilization and early embryogenesis, but the regulatory mechanisms to gametes and zygotes are unclear. We evaluated the oviductal regulation of early embryonic development using Ovgp1 (encoding an oviductal humoral factor, OVGP1)-knockout golden hamsters. The experimental results revealed the following: (1) female Ovgp1-knockout hamsters failed to produce litters; (2) in the oviducts of Ovgp1-knockout animals, fertilized eggs were sometimes identified, but their morphology showed abnormal features; (3) the number of implantations in the Ovgp1-knockout females was low; (4) even if implantations occurred, the embryos developed abnormally and eventually died; and (5) Ovgp1-knockout female ovaries transferred to wild-type females resulted in the production of Ovgp1-knockout egg-derived OVGP1-null litters, but the reverse experiment did not. These results suggest that OVGP1-mediated physiological events are crucial for reproductive process in vivo, from fertilization to early embryonic development. This animal model shows that the fate of the zygote is determined not only genetically, but also by the surrounding oviductal microenvironment.
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Affiliation(s)
- Kenji Yamatoya
- Institute for Environmental & Gender-Specific Medicine, Juntendo University Graduate School of Medicine, Chiba, Japan
| | - Masaru Kurosawa
- Institute for Environmental & Gender-Specific Medicine, Juntendo University Graduate School of Medicine, Chiba, Japan
| | - Michiko Hirose
- Bioresource Engineering Division, RIKEN BioResource Research Center, Ibaraki, Japan
| | - Yoshiki Miura
- Laboratory of Proteomics & Biomolecular Sciences, Biomedical Research Core Facilities, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Hikari Taka
- Laboratory of Proteomics & Biomolecular Sciences, Biomedical Research Core Facilities, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Tomoyuki Nakano
- Department of Anatomy and Cell Biology, Yamagata University School of Medicine, Yamagata, Japan
| | - Akiko Hasegawa
- Department of Obstetrics & Gynecology, Hyogo Medical University, Hyogo, Japan
| | - Kyosuke Kagami
- Department of Obstetrics & Gynecology, Kanazawa University Graduate School of Medical Sciences, Ishikawa, Japan
| | - Hiroshi Yoshitake
- Institute for Environmental & Gender-Specific Medicine, Juntendo University Graduate School of Medicine, Chiba, Japan
| | - Kaoru Goto
- Department of Anatomy and Cell Biology, Yamagata University School of Medicine, Yamagata, Japan
| | - Takashi Ueno
- Laboratory of Proteomics & Biomolecular Sciences, Biomedical Research Core Facilities, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Hiroshi Fujiwara
- Department of Obstetrics & Gynecology, Kanazawa University Graduate School of Medical Sciences, Ishikawa, Japan
| | - Yoichi Shinkai
- Cellular Memory Laboratory, RIKEN Cluster for Pioneering Research, RIKEN, Saitama, Japan
| | - Frederick W K Kan
- Department of Biomedical and Molecular Sciences, Faculty of Health Sciences, Queen’s University, Kingston, ON, Canada
| | - Atsuo Ogura
- Bioresource Engineering Division, RIKEN BioResource Research Center, Ibaraki, Japan
| | - Yoshihiko Araki
- Institute for Environmental & Gender-Specific Medicine, Juntendo University Graduate School of Medicine, Chiba, Japan
- Division of Microbiology and Immunology, Department of Pathology and Microbiology, Nihon University School of Medicine, Tokyo, Japan
- Department of Obstetrics & Gynecology, Juntendo University Graduate School of Medicine, Tokyo, Japan
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Araki Y. Embryos, cancers, and parasites: Potential applications to the study of reproductive biology in view of their similarity as biological phenomena. Reprod Med Biol 2022; 21:e12447. [PMID: 35386372 PMCID: PMC8967296 DOI: 10.1002/rmb2.12447] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 01/26/2022] [Accepted: 01/31/2022] [Indexed: 11/11/2022] Open
Abstract
Background At present, there are so many living things on the earth. Most of these organisms have a reproductive strategy called sexual reproduction. Among organisms that reproduce sexually, mammals have an extremely complex and seemingly unnatural method of reproduction, or viviparity. Methods As an approach to understanding the nature of viviparity, the author have tried to outline the common life phenomena of embryos, cancers, and parasites based on the literature to date, with internal parasites as the keyword. Main findings Embryo, cancer, and parasite are constituted as a systemic interaction with the host (mother). Based on these facts, the author proposed the hypothesis that in the case of mammals, "the fetus is essentially harmful to the mother", and that the parasitic fetus grows by skillfully evading the mother's foreign body exclusion mechanism. Conclusion Comparative studies of "embryos", "cancers", and "parasites" as foreign bodies have the potential to produce unexpected discoveries in their respective fields. It is important to consider the evolutionary time axis that the basic structure of our mammalian body arose over 200 million years from the Mesozoic Triassic, the period immediately after the Paleozoic Era, when life on Earth became massively extinct.
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Affiliation(s)
- Yoshihiko Araki
- Institute for Environmental & Gender‐specific MedicineJuntendo University Graduate School of MedicineChibaJapan
- Department of Obstetrics & GynecologyJuntendo University Graduate School of MedicineTokyoJapan
- Division of Microbiology and ImmunologyDepartment of Pathology and MicrobiologyNihon University School of MedicineTokyoJapan
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