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Hosotani M, Ichii O, Nakamura T, Masum MA, Otani Y, Otsuka-Kanazawa S, Elewa YHA, Kon Y. MRL/MpJ mice produce more oocytes and exhibit impaired fertilisation and accelerated luteinisation after superovulation treatment. Reprod Fertil Dev 2019; 31:760-773. [DOI: 10.1071/rd18319] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Accepted: 11/09/2018] [Indexed: 11/23/2022] Open
Abstract
MRL/MpJ mice exhibit distinct phenotypes in several biological processes, including wound healing. Herein we report two unique phenotypes in the female reproductive system of MRL/MpJ mice that affect ovulation and luteinisation. We found that superovulation treatment resulted in the production of significantly more oocytes in MRL/MpJ than C57BL/6 mice (71.0±13.4 vs 26.8±2.8 respectively). However, no exon mutations were detected in genes coding for female reproductive hormones or their receptors in MRL/MpJ mice. In addition, the fertilisation rate was lower for ovulated oocytes from MRL/MpJ than C57BL/6 mice, with most of the fertilised oocytes showing abnormal morphology, characterised by deformation and cytolysis. Histological tracing of luteinisation showed that MRL/MpJ mice formed corpora lutea within 36h after ovulation, whereas C57BL/6 mice were still at the corpora haemorrhagica formation stage after 36h. The balance between the expression of matrix metalloproteinases and their tissue inhibitors shifted towards the former earlier after ovulation in MRL/MpJ than C57BL/6 mice. This result indicates a possible link between accelerated extracellular matrix remodelling in the ovulated or ruptured follicles and luteinisation in MRL/MpJ mice. Together, these findings reveal novel phenotypes in MRL/MpJ mice that provide novel insights into reproductive biology.
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Nakamura T, Chihara M, Ichii O, Otsuka-Kanazawa S, Nagasaki KI, Elewa YHA, Tatsumi O, Kon Y. Ovarian mast cells migrate toward ovary-fimbria connection in neonatal MRL/MpJ mice. PLoS One 2018; 13:e0196364. [PMID: 29684078 PMCID: PMC5912760 DOI: 10.1371/journal.pone.0196364] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Accepted: 04/11/2018] [Indexed: 12/02/2022] Open
Abstract
MRL/MpJ mice have abundant ovarian mast cells (MCs) as compared with other strains at postnatal day 0 (P0); however, they sharply decrease after birth. These ovarian MCs, particularly beneath the ovarian surface epithelium (SE), which express mucosal MC (MMC) marker, might participate in early follicular development. This study investigated the changes in spatiotemporal distribution of MCs in the perinatal MRL/MpJ mouse ovaries. At P0 to P7, the MCs were densely localized to the ovary, especially their caudomedial region around the ovary-fimbria connection. The neonatal ovarian MCs showed intermediate characteristics of MMC and connective tissue MC (CTMC), and the latter phenotype became evident with aging. However, the expression ratio of the MMC to CTMC marker increased from P0 to P4 in the MRL/MpJ mouse ovary. Similarly, the ratio of MCs facing SE to total MC number increased with aging, although the number of ovarian MCs decreased, indicating the relative increase in MMC phenotypes in the early neonatal ovary. Neither proliferating nor apoptotic MCs were found in the MRL/MpJ mouse ovaries. The parenchymal cells surrounding MCs at ovary-fimbria connection showed similar molecular expression patterns (E-cadherin+/Foxl2-/Gata4+) as that of the ovarian surface epithelial cells. At P2, around the ovary-fimbria connection, c-kit- immature oocytes formed clusters called nests, and some MCs localized adjacent to c-kit- oocytes within the nests. These results indicated that in postnatal MRL/MpJ mice, ovarian MCs changed their distribution by migrating toward the parenchymal cells composing ovary-fimbria connection, which possessed similar characteristics to the ovarian surface epithelium. Thus, we elucidated the spatiotemporal alterations of the ovarian MCs in MRL/MpJ mice, and suggested their importance during the early follicular development by migrating toward the ovary-fimbria connection. MRL/MpJ mice would be useful to elucidate the relationship between neonatal immunity and reproductive systems.
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Affiliation(s)
- Teppei Nakamura
- Laboratory of Anatomy, Department of Basic Veterinary Sciences, Division of Veterinary Medicine, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
- Section of Biological Science, Chitose Laboratory, Japan Food Research Laboratories, Chitose, Hokkaido, Japan
| | - Masataka Chihara
- Laboratory of Anatomy, Department of Basic Veterinary Sciences, Division of Veterinary Medicine, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Osamu Ichii
- Laboratory of Anatomy, Department of Basic Veterinary Sciences, Division of Veterinary Medicine, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Saori Otsuka-Kanazawa
- Laboratory of Anatomy, Department of Basic Veterinary Sciences, Division of Veterinary Medicine, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Ken-ichi Nagasaki
- Section of Biological Safety Research, Tama Laboratory, Japan Food Research Laboratories, Tama, Tokyo, Japan
| | - Yaser Hosny Ali Elewa
- Laboratory of Anatomy, Department of Basic Veterinary Sciences, Division of Veterinary Medicine, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
- Department of Histology and Cytology, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
| | - Osamu Tatsumi
- Section of Biological Science, Chitose Laboratory, Japan Food Research Laboratories, Chitose, Hokkaido, Japan
| | - Yasuhiro Kon
- Laboratory of Anatomy, Department of Basic Veterinary Sciences, Division of Veterinary Medicine, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
- * E-mail:
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Ichii O, Chihara M, Lee SH, Nakamura T, Otsuka-Kanazawa S, Horino T, Elewa YHA, Kon Y. Hydronephrosis with ureteritis developed in C57BL/6N mice carrying the congenic region derived from MRL/MpJ-type chromosome 11. Autoimmunity 2016; 50:114-124. [PMID: 28010137 DOI: 10.1080/08916934.2016.1261831] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Inbred MRL/MpJ mice show several unique phenotypes in tissue regeneration processes and the urogenital and immune systems. Clarifying the genetic and molecular bases of these phenotypes requires the analysis of their genetic susceptibility locus. Herein, hydronephrosis development was incidentally observed in MRL/MpJ-derived chromosome 11 (D11Mit21-212)-carrying C57BL/6N-based congenic mice, which developed bilateral or unilateral hydronephrosis in both males and females with 23.5% and 12.5% prevalence, respectively. Histopathologically, papillary malformations of the transitional epithelium in the pelvic-ureteric junction seemed to constrict the ureter luminal entrance. Characteristically, eosinophilic crystals were observed in the lumen of diseased ureters. These ureters were surrounded by infiltrating cells mainly composed of numerous CD3+ T-cells and B220+ B-cells. Furthermore, several Iba-1+ macrophages, Gr-1+ granulocytes, mast cells and chitinase 3-like 3/Ym1 (an important inflammatory lectin)-positive cells were detected. Eosinophils also accumulated to these lesions in diseased ureters. Some B6.MRL-(D11Mit21-D11Mit212) mice had duplicated ureters. We determined >100 single nucleotide variants between C57BL/6N- and MRL/MpJ-type chromosome 11 congenic regions, which were associated with nonsynonymous substitution, frameshift or stopgain of coding proteins. In conclusion, B6.MRL-(D11Mit21-D11Mit212) mice spontaneously developed hydronephrosis due to obstructive uropathy with inflammation. Thus, this mouse line would be useful for molecular pathological analysis of obstructive uropathy in experimental medicine.
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Affiliation(s)
- Osamu Ichii
- a Laboratory of Anatomy , Department of Biomedical Sciences, Graduate School of Veterinary Medicine, Hokkaido University , Sapporo , Japan
| | - Masataka Chihara
- b R&D Department, Daiichi Sankyo Healthcare Co., Ltd. , Tokyo , Japan
| | - Shin-Hyo Lee
- c Department of Anatomy , Research Institute of Medical Science, Konkuk University School of Medicine , Seoul , Republic of Korea
| | - Teppei Nakamura
- a Laboratory of Anatomy , Department of Biomedical Sciences, Graduate School of Veterinary Medicine, Hokkaido University , Sapporo , Japan.,d Section of Biological Safety Research, Chitose Laboratory, Japan Food Research Laboratories , Chitose , Japan
| | - Saori Otsuka-Kanazawa
- a Laboratory of Anatomy , Department of Biomedical Sciences, Graduate School of Veterinary Medicine, Hokkaido University , Sapporo , Japan
| | - Taro Horino
- e Department of Endocrinology , Metabolism and Nephrology, Kochi Medical School, Kochi University , Nankoku , Japan , and
| | - Yaser Hosny Ali Elewa
- a Laboratory of Anatomy , Department of Biomedical Sciences, Graduate School of Veterinary Medicine, Hokkaido University , Sapporo , Japan.,f Department of Histology and Cytology , Faculty of Veterinary Medicine, Zagazig University , Zagazig , Egypt
| | - Yasuhiro Kon
- a Laboratory of Anatomy , Department of Biomedical Sciences, Graduate School of Veterinary Medicine, Hokkaido University , Sapporo , Japan
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