1
|
Astudillo I, Aspee K, Palomino J, Peralta OA, Parraguez VH, De los Reyes M. Meiotic Development of Canine Oocytes from Poly-Ovular and Mono-Ovular Follicles after In Vitro Maturation. Animals (Basel) 2023; 13:ani13040648. [PMID: 36830434 PMCID: PMC9951663 DOI: 10.3390/ani13040648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 02/04/2023] [Accepted: 02/09/2023] [Indexed: 02/15/2023] Open
Abstract
Poly-ovular follicles are defined as those with more than one oocyte present in single follicles. The occurrence frequency of this follicle type is higher in canines than that in other species. This study aimed to evaluate the in vitro meiotic maturation of dog oocytes from this follicle type in comparison to those from mono-ovular follicles of various sizes (small antral, medium antral, and large antral) considering different phases of the estrus cycle (anestrus, proestrus, estrus, and diestrus). Canine oocytes were obtained separately from the poly-ovular and mono-ovular antral follicles from the ovaries of adult females. In each experimental replicate, cumulus-oocyte complexes (COCs) from poly-ovular and mono-ovular follicles were incubated in supplemented TCM-199 at 38.5 °C and 5% CO2 for 72 h. After culturing, the meiotic development of each oocyte was evaluated using epifluorescence microscopy. Meiotic stages were classified into germinal vesicle (GV), germinal vesicle breakdown (GVBD), first metaphase (MI), and second metaphase (MII). Data were evaluated using an analysis of variance. Oocytes from poly-ovular follicles at all phases exhibited a higher (p < 0.05) percentage of oocytes arrested at the GV stage than those from mono-ovular follicles, showing the highest rate of GV in small antral follicles during anestrus. In contrast, there were no differences in MII rates (p < 0.05) in oocytes from mono-ovular and poly-ovular follicles during the estrus and diestrus phases in all sizes evaluated, with the highest MII rate in estrus. These results suggest that oocytes from poly-ovular follicles can resume meiosis at a slower rate than those from mono-ovular follicles; however, the maturation in vitro of such oocytes is possible. Furthermore, the relationship between the maturation capacity of oocytes from both poly-ovular and mono-ovular follicles depends on the ovarian cycle and follicular development.
Collapse
Affiliation(s)
- Igor Astudillo
- Laboratory of Animal Reproduction, Department of Animal Production, Faculty of Veterinary Sciences, University of Chile, Santiago 8820000, Chile
| | - Karla Aspee
- Laboratory of Animal Reproduction, Department of Animal Production, Faculty of Veterinary Sciences, University of Chile, Santiago 8820000, Chile
| | - Jaime Palomino
- College of Veterinary Medicine, Faculty of Medical Sciences, Bernardo O’Higgins University, Santiago 8320000, Chile
| | - Oscar A. Peralta
- Laboratory of Animal Reproduction, Department of Animal Production, Faculty of Veterinary Sciences, University of Chile, Santiago 8820000, Chile
| | - Victor H. Parraguez
- Laboratory of Animal Physiology, Department of Biological Sciences, Faculty of Veterinary Sciences, University of Chile, Santiago 8820000, Chile
| | - Monica De los Reyes
- Laboratory of Animal Reproduction, Department of Animal Production, Faculty of Veterinary Sciences, University of Chile, Santiago 8820000, Chile
- Correspondence: ; Tel.: +56-2-29785534
| |
Collapse
|
2
|
Choi H, Oh D, Kim M, Cai L, Lee J, Kim E, Lee G, Hyun SH. Copper deficiency affects the developmental competence of porcine oocytes matured in vitro. Front Cell Dev Biol 2022; 10:993030. [PMID: 36158185 PMCID: PMC9490373 DOI: 10.3389/fcell.2022.993030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Accepted: 08/17/2022] [Indexed: 12/03/2022] Open
Abstract
The trace element Cu is required for the activity of various enzymes essential for physiological processes. In this study, we elucidated the copper transport system in porcine follicular cells and investigated the effect of Cu chelation during in vitro maturation (IVM) of porcine oocytes and subsequent embryonic development after parthenogenetic activation (PA). Cu chelation was induced by adding tetraethylenepentamine (TEPA) to the maturation media (TCM199-PVA). First, we identified the localization and relative levels of the copper transporter CTR1 in follicular cells. The level of CTR1 protein was the highest in mature cumulus cells; moreover, CTR1 was mainly localized in the cytoplasmic vesicular compartment in oocytes, whereas it was evenly distributed in the cytoplasm in cumulus cells. A total of 42 h after IVM, the TEPA-treated group showed reduced maturation rates compared to those of the control (p < 0.05). This negative effect of TEPA disappeared when it was added to the media with Cu (Cu + TEPA group). The TEPA treatment during IVM significantly increased the mRNA levels of the Has2 gene, which is related to cumulus expansion (p < 0.05). Both Cu supplementation and chelation significantly increased the reactive oxygen species (ROS) levels in porcine oocytes (p < 0.05). When we analyzed the transcript levels of folliculogenesis-related genes in Cu chelation conditions, only the expression of MAPK3 in cumulus cells significantly increased compared to that of the control. We also evaluated the subsequent embryonic development of PA embryos. TEPA-treated oocytes showed significantly decreased blastocyst formation rates compared to those of the control. The TEPA-induced toxic effect was alleviated when Cu was added with TEPA. Our findings suggest that the Cu transport system plays an important role in the porcine follicular development process and that the Cu deficiency negatively affects porcine oocyte maturation, as well as their subsequent developmental competence.
Collapse
Affiliation(s)
- Hyerin Choi
- Veterinary Medical Center and College of Veterinary Medicine, Laboratory of Veterinary Embryology and Biotechnology (VETEMBIO), Chungbuk National University, Cheongju, South Korea
- Institute of Stem Cell and Regenerative Medicine (ISCRM), Chungbuk National University, Cheongju, South Korea
| | - Dongjin Oh
- Veterinary Medical Center and College of Veterinary Medicine, Laboratory of Veterinary Embryology and Biotechnology (VETEMBIO), Chungbuk National University, Cheongju, South Korea
- Institute of Stem Cell and Regenerative Medicine (ISCRM), Chungbuk National University, Cheongju, South Korea
| | - Mirae Kim
- Veterinary Medical Center and College of Veterinary Medicine, Laboratory of Veterinary Embryology and Biotechnology (VETEMBIO), Chungbuk National University, Cheongju, South Korea
- Institute of Stem Cell and Regenerative Medicine (ISCRM), Chungbuk National University, Cheongju, South Korea
| | - Lian Cai
- Veterinary Medical Center and College of Veterinary Medicine, Laboratory of Veterinary Embryology and Biotechnology (VETEMBIO), Chungbuk National University, Cheongju, South Korea
- Institute of Stem Cell and Regenerative Medicine (ISCRM), Chungbuk National University, Cheongju, South Korea
- Graduate School of Veterinary Biosecurity and Protection, Chungbuk National University, Cheongju, South Korea
| | - Joohyeong Lee
- Veterinary Medical Center and College of Veterinary Medicine, Laboratory of Veterinary Embryology and Biotechnology (VETEMBIO), Chungbuk National University, Cheongju, South Korea
- Institute of Stem Cell and Regenerative Medicine (ISCRM), Chungbuk National University, Cheongju, South Korea
| | - Eunhye Kim
- Laboratory of Molecular Diagnostics and Cell Biology, College of Veterinary Medicine, Gyeongsang National University, Jinju, South Koreaa
| | - Gabsang Lee
- Department of Neurology, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Sang-Hwan Hyun
- Veterinary Medical Center and College of Veterinary Medicine, Laboratory of Veterinary Embryology and Biotechnology (VETEMBIO), Chungbuk National University, Cheongju, South Korea
- Institute of Stem Cell and Regenerative Medicine (ISCRM), Chungbuk National University, Cheongju, South Korea
- Graduate School of Veterinary Biosecurity and Protection, Chungbuk National University, Cheongju, South Korea
- *Correspondence: Sang-Hwan Hyun,
| |
Collapse
|
3
|
Priya K, Setty M, Babu UV, Pai KSR. Implications of environmental toxicants on ovarian follicles: how it can adversely affect the female fertility? ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:67925-67939. [PMID: 34628616 PMCID: PMC8718383 DOI: 10.1007/s11356-021-16489-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Accepted: 09/07/2021] [Indexed: 05/06/2023]
Abstract
The pool of primordial follicles formed in the ovaries during early development determines the span and quality of fertility in the reproductive life of a woman. As exposure to occupational and environmental toxicants (ETs) has become inevitable, consequences on female fertility need to be established. This review focuses on the ETs, especially well-studied prototypes of the classes endocrine disrupting chemicals (EDCs), heavy metals, agrochemicals, cigarette smoke, certain chemicals used in plastic, cosmetic and sanitary product industries etc that adversely affect the female fertility. Many in vitro, in vivo and epidemiological studies have indicated that these ETs have the potential to affect folliculogenesis and cause reduced fertility in women. Here, we emphasize on four main conditions: polycystic ovary syndrome, primary ovarian insufficiency, multioocytic follicles and meiotic defects including aneuploidies which can be precipitated by ETs. These are considered main causes for reduced female fertility by directly altering the follicular recruitment, development and oocytic meiosis. Although substantial experimental evidence is drawn with respect to the detrimental effects, it is clear that establishing the role of one ET as a risk factor in a single condition is difficult as multiple conditions have common risk factors. Therefore, it is important to consider this as a matter of public and wildlife health.
Collapse
Affiliation(s)
- Keerthi Priya
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Manjunath Setty
- Department of Pharmacognosy, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Uddagiri Venkanna Babu
- Phytochemistry Department, R & D Centre, The Himalaya Drug Company, Makali, Tumkur Road, Bangalore, Karnataka, 562162, India
| | - Karkala Sreedhara Ranganath Pai
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India.
| |
Collapse
|
4
|
Comparison of Ovarian Morphology and Follicular Disturbances between Two Inbred Strains of Cotton Rats ( Sigmodon hispidus). Animals (Basel) 2021; 11:ani11061768. [PMID: 34204816 PMCID: PMC8231567 DOI: 10.3390/ani11061768] [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: 05/24/2021] [Revised: 06/08/2021] [Accepted: 06/10/2021] [Indexed: 12/02/2022] Open
Abstract
Simple Summary Multi-oocyte follicles have been reported in several mammals, especially in rabbits and hamsters, although their significance remains unclear. The present study compared ovarian histology, focusing on folliculogenesis, between two inbred cotton rat strains maintained at Hokkaido Institute of Public Health and the University of Miyazaki. Abundant multi-oocyte follicles and double-nucleated oocytes were observed in the Hokkaido strain, whereas Miyazaki had fewer multi-oocyte follicles and lacked double-nucleated oocytes. These findings indicate that early folliculogenesis events such as oocyte nest breakdown and oocyte vitality, rather than proliferation and cell death in each oocyte, affect the unique ovarian phenotypes found in cotton rats, including multi-oocyte follicles or double-nucleated oocytes, and their differences between strains. Therefore, these results can clarify mammalian folliculogenesis and its abnormal processes. Abstract Most mammalian ovarian follicles contain only a single oocyte having a single nucleus. However, two or more oocytes and nuclei are observed within one follicle and one oocyte, respectively, in several species, including cotton rat (CR, Sigmodon hispidus). The present study compared ovarian histology, focusing on folliculogenesis, between two inbred CR strains, HIS/Hiph and HIS/Mz. At 4 weeks of age, ovarian sections from both the strains were analyzed histologically. Multi-oocyte follicles (MOFs) and double-nucleated oocytes (DNOs) were observed in all stages of developing follicles in HIS/Hiph, whereas HIS/Mz had MOFs up to secondary stages and lacked DNOs. The estimated total follicles in HIS/Mz were almost half that of HIS/Hiph, but interstitial cells were well developed in HIS/Mz. Furthermore, immunostaining revealed no clear strain differences in the appearance of oocytes positive for Ki67, PCNA, and p63 in MOF or DNOs; no cell death was observed in these oocytes. Ultrastructural analysis revealed more abundant mitochondrial clouds in oocytes of HIS/Hiph than HIS/Mz. Thus, we clarified the strain differences in the CR ovary. These findings indicate that early events during folliculogenesis affect the unique ovarian phenotypes found in CRs, including MOFs or DNOs, and their strain differences.
Collapse
|
5
|
Islam MR, Ichii O, Nakamura T, Irie T, Masum MA, Otani Y, Namba T, Chuluunbaatar T, Elewa YHA, Kon Y. Developmental Changes of the Ovary in Neonatal Cotton Rat ( Sigmodon hispidus). Front Physiol 2021; 11:601927. [PMID: 33519507 PMCID: PMC7838641 DOI: 10.3389/fphys.2020.601927] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 12/16/2020] [Indexed: 12/31/2022] Open
Abstract
The reproductive characteristics and ovarian development in cotton rats (Sigmodon hispidus, CRs) are unclear, although CRs are commonly used as animal models in biomedical research. We previously reported that young (6-8 weeks) CRs showed multi-oocyte follicles (MOFs) and double nucleated oocytes (DNOs) in different stages of follicles. The developmental changes in neonatal CR ovaries were investigated in the present study and were compared with our findings in previous studies of unique phenotypes, particularly in oocytes. CR ovaries at postnatal days (PND) 0, 4, and 7 were obtained from the Hokkaido Institute of Public Health. Samples were analyzed by light and transmission electron microscopy. The general histology and folliculogenesis in CR ovaries were similar to those in other experimental rodents. However, DNOs were observed in all age categories and were frequently observed in primordial follicles, whereas MOFs started to develop from PND4 with greater frequency in primary follicles. Almost all developing follicles expressed DEAD (Asp-Glu-Ala-Asp) box polypeptide 4 and forkhead box L2, which are representative markers of oocytes and follicular epithelial cells, respectively. Ki-67 staining demonstrated the proliferative activity of granulosa cells, but not of oocytes, in follicles. Moreover, rapid folliculogenesis of CR due to a small number of apoptotic oocytes was suggested, based on results of the terminal deoxynucleotidyl transferase dUTP nick end labeling assay, confirming the formation of DNOs or MOFs. These findings clarify the development of unique phenotypes of neonatal CR ovaries and support it as a useful model to better understand folliculogenesis and oocytogenesis as well as their abnormalities in humans and other animals.
Collapse
Affiliation(s)
- Md Rashedul Islam
- Laboratory of Anatomy, Department of Basic Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Japan.,Department of Surgery and Theriogenology, Faculty of Animal Science and Veterinary Medicine, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh
| | - Osamu Ichii
- Laboratory of Anatomy, Department of Basic Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Japan.,Laboratory of Agrobiomedical Science, Faculty of Agriculture, Hokkaido University, Sapporo, Japan
| | - Teppei Nakamura
- Laboratory of Anatomy, Department of Basic Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Japan.,Section of Biological Safety Research, Chitose Laboratory, Japan Food Research Laboratories, Chitose, Japan
| | - Takao Irie
- Laboratory of Veterinary Parasitology, Faculty of Agriculture, University of Miyazaki, Miyazaki, Japan
| | - Md Abdul Masum
- Laboratory of Anatomy, Department of Basic Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Japan.,Department of Anatomy, Histology and Physiology, Faculty of Animal Science and Veterinary Medicine, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh
| | - Yuki Otani
- Laboratory of Anatomy, Department of Basic Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Japan
| | - Takashi Namba
- Laboratory of Anatomy, Department of Basic Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Japan
| | - Tsolmon Chuluunbaatar
- Laboratory of Anatomy, Department of Basic Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Japan.,Department of Basic Science of Veterinary Medicine, School of Veterinary Medicine, Mongolian University of Life Science, Ulaanbaatar, Mongolia
| | - Yaser Hosny Ali Elewa
- Laboratory of Anatomy, Department of Basic Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Japan.,Department of Histology, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
| | - Yasuhiro Kon
- Laboratory of Anatomy, Department of Basic Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Japan
| |
Collapse
|
6
|
Islam MR, Ichii O, Nakamura T, Irie T, Masum MA, Hosotani M, Otani Y, Elewa YHA, Kon Y. Unique morphological characteristics in the ovary of cotton rat (Sigmodon hispidus). J Reprod Dev 2020; 66:529-538. [PMID: 32879182 PMCID: PMC7768171 DOI: 10.1262/jrd.2020-061] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Cotton rats (Sigmodon hispidus, CRs) are commonly used as animal models in biomedical research. However, the reproductive characteristics and ovarian development in the CRs has not been widely investigated. We have previously shown that female CRs, in particular, show several unique phenotypes associated with the urogenital system, such as chronic kidney disease and pyometra. Our investigation revealed unique morphologies in CR ovaries, particularly in oocytes. Cotton rat ovaries at 6-8 weeks of age were obtained from the Hokkaido Institute of Public Health, and their sections analyzed by light microscopy and transmission electron microscopy. Although the general histology and folliculogenesis of CR ovaries were similar to those of other experimental rodents, multi-oocyte follicles (MOFs) and double nucleated oocytes (DNOs) were also observed. Although MOFs were found at all stages of follicular development, a greater frequency of MOFs was observed in the primary and secondary stages. However, DNOs tended to be frequently observed in primordial follicles. Almost all MOF oocytes and a few DNOs possessed a clear zona pellucida, expressed DEAD (Asp-Glu-Ala-Asp) box polypeptide 4 and Forkhead box protein 2, a representative marker of oocytes and follicular epithelial cells. Thus, our investigations revealed the unique phenotypes of the CR ovary. As MOFs and DNOs are occasionally observed in human patients with infertility, the CR would be a useful animal model to study for gaining a better understanding of folliculogenesis and oocytogenesis, as well as their abnormalities in humans and other animals.
Collapse
Affiliation(s)
- Md Rashedul Islam
- Laboratory of Anatomy, Department of Basic Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Hokkaido 060-0818, Japan.,Department of Surgery and Theriogenology, Faculty of Animal Science and Veterinary Medicine, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh
| | - Osamu Ichii
- Laboratory of Anatomy, Department of Basic Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Hokkaido 060-0818, Japan.,Laboratory of Agrobiomedical Science, Faculty of Agriculture, Hokkaido University, Hokkaido 060-0818, Japan
| | - Teppei Nakamura
- Laboratory of Anatomy, Department of Basic Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Hokkaido 060-0818, Japan.,Section of Biological Safety Research, Chitose Laboratory, Japan Food Research Laboratories, Hokkaido 060-0818, Japan
| | - Takao Irie
- Medical Zoology Group, Dept. of Infectious Diseases, Hokkaido Institute of Public Health, Hokkaido 060-0818, Japan
| | - Md Abdul Masum
- Laboratory of Anatomy, Department of Basic Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Hokkaido 060-0818, Japan.,Department of Anatomy, Histology and Physiology, Faculty of Animal Science and Veterinary Medicine, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh
| | - Marina Hosotani
- Laboratory of Anatomy, School of Veterinary Medicine, Rakuno Gakuen University, Hokkaido 060-0818, Japan
| | - Yuki Otani
- Laboratory of Anatomy, Department of Basic Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Hokkaido 060-0818, Japan
| | - Yaser Hosny Ali Elewa
- Laboratory of Anatomy, Department of Basic Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Hokkaido 060-0818, Japan.,Department of Histology, Faculty of Veterinary Medicine, Zagazig University, Zagazig 44519, Egypt
| | - Yasuhiro Kon
- Laboratory of Anatomy, Department of Basic Veterinary Sciences, Faculty of Veterinary Medicine, Hokkaido University, Hokkaido 060-0818, Japan
| |
Collapse
|
7
|
In vitro Production of Porcine Embryos: Current Status and Possibilities – A Review. ANNALS OF ANIMAL SCIENCE 2020. [DOI: 10.2478/aoas-2020-0030] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Abstract
This paper presents the current possibilities, state of knowledge and prospects of in vitro production (IVP) of pig embryos, which consists of in vitro oocyte maturation, in vitro fertilization and in vitro embryo culture. In pigs, oocyte maturation is one of the most important stages in the embryo IVP process. It determines the oocyte’s fertilization ability as well as its embryonic development. Through many research studies of the proper selection of oocytes and appropriate maturation medium composition (especially the addition of various supplements), the in vitro maturation of pig oocytes has been significantly improved. Recent studies have demonstrated that modifications of the diluents and in vitro fertilization media can reduce polyspermy. Furthermore, several adjustments of the porcine culture media with the addition of some supplements have enhanced the embryo quality and developmental competence. These updates show the progress of IVP in pigs that has been achieved; however, many problems remain unsolved.
Collapse
|
8
|
Elmore SA, Cesta MF, Crabbs TA, Janardhan KS, Krane GA, Mahapatra D, Quist EM, Rinke M, Schaaf GW, Travlos GS, Wang H, Willson CJ, Wolf JC. Proceedings of the 2019 National Toxicology Program Satellite Symposium. Toxicol Pathol 2019; 47:913-953. [PMID: 31645210 PMCID: PMC6911009 DOI: 10.1177/0192623319876929] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The 2019 annual National Toxicology Program Satellite Symposium, entitled "Pathology Potpourri," was held in Raleigh, North Carolina, at the Society of Toxicologic Pathology's 38th annual meeting. The goal of this symposium was to present and discuss challenging diagnostic pathology and/or nomenclature issues. This article presents summaries of the speakers' talks along with select images that were used by the audience for voting and discussion. Various lesions and topics covered during the symposium included aging mouse lesions from various strains, as well as the following lesions from various rat strains: rete testis sperm granuloma/fibrosis, ovarian cystadenocarcinoma, retro-orbital schwannoma, periductal cholangiofibrosis of the liver and pancreas, pars distalis hypertrophy, chronic progressive nephropathy, and renal tubule regeneration. Other cases included polyovular follicles in young beagle dogs and a fungal blood smear contaminant. One series of cases challenged the audience to consider how immunohistochemistry may improve the diagnosis of some tumors. Interesting retinal lesions from a rhesus macaque emphasized the difficulty in determining the etiology of any particular retinal lesion due to the retina's similar response to vascular injury. Finally, a series of lesions from the International Harmonization of Nomenclature and Diagnostic Criteria Non-Rodent Fish Working Group were presented.
Collapse
Affiliation(s)
- Susan A. Elmore
- Cellular and Molecular Pathology Branch, National Toxicology Program, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina, USA
| | - Mark F. Cesta
- Cellular and Molecular Pathology Branch, National Toxicology Program, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina, USA
| | - Torrie A Crabbs
- Experimental Pathology Laboratories, Inc., Research Triangle Park, North Carolina, USA
| | | | - Gregory A. Krane
- Cellular and Molecular Pathology Branch, National Toxicology Program, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina, USA
| | - Debabrata Mahapatra
- Integrated Laboratory Systems, Inc., Research Triangle Park, North Carolina, USA
| | - Erin M. Quist
- Experimental Pathology Laboratories, Inc., Research Triangle Park, North Carolina, USA
| | | | - George W. Schaaf
- Wake Forest University School of Medicine, Winston Salem, North Carolina, USA
| | - Gregory S. Travlos
- Cellular and Molecular Pathology Branch, National Toxicology Program, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina, USA
| | - Haoan Wang
- West China-Frontier Pharma Tech Co., Ltd., Chengdu, Sichuan, China
| | - Cynthia J. Willson
- Integrated Laboratory Systems, Inc., Research Triangle Park, North Carolina, USA
| | - Jeffrey C. Wolf
- Experimental Pathology Laboratories, Inc., Sterling, Virginia, USA
| |
Collapse
|
9
|
Harrath AH, Alrezaki A, Mansour L, Alwasel SH, Palomba S. Food restriction during pregnancy and female offspring fertility: adverse effects of reprogrammed reproductive lifespan. J Ovarian Res 2017; 10:77. [PMID: 29282125 PMCID: PMC5745764 DOI: 10.1186/s13048-017-0372-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Accepted: 12/15/2017] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Food restriction during pregnancy can influence the health of the offspring during the adulthood. The aim of the present study was to examine the effect of maternal food restriction (MFR) on the reproductive performance in female rat offspring from the first (FR1) and second (FR2) generations. METHODS Adult virgin Wistar female rats were given free access to tap water and were fed ad libitum on standard rodent chow, were mated with virgin adult males, and then were randomly divided into two groups: controls (that was fed ad libitum ) and food-restricted group (FR, that was given only 50% of ad libitum food throughout gestation). Their first (FR1) and the second (FR2) generation of offspring were fed ad libitum and sacrificed before puberty and at adulthood. Their ovaries were removed and their histology evaluated by estimating the number of follicles (total and at various stages of folliculogenesis), and the presence of multi-nuclei oocytes and multi-oocyte follicles. RESULTS Total number of ovarian follicles was lower in FR1 females at week 4 in comparison with controls, while it was not different in FR2 females vs. CONTROLS The number of the primordial follicle was lower in FR1 and FR2 females vs. controls at both week 4 and at week 8. When compared to the controls, the follicles containing multi-nuclei oocytes were more frequent in ovaries from FR1 and FR2 females at week 4, and higher and lower respectively in ovaries form FR1 and FR2 females at week 8. CONCLUSION MFR affects ovarian histology by inducing the development of abnormal follicles in the ovaries in first and second generation offspring. This finding could influence the ovarian function resulting in an early pubertal onset and an early decline in reproductive lifespan.
Collapse
Affiliation(s)
- Abdel Halim Harrath
- Zoology Department, College of Science, King Saud University, Riyadh, Saudi Arabia.
- Unit of Reproductive and Developmental Biology, Faculty of Science of Tunis, University of Tunis El Manar, Tunis, Tunisia.
| | - Abdulkarem Alrezaki
- Zoology Department, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Lamjed Mansour
- Zoology Department, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Saleh H Alwasel
- Zoology Department, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Stefano Palomba
- Unit of Gynecology and Obstetrics, Grande Ospedale Metropolitano "Bianchi - Melacrino - Morelli", Reggio Calabria, Italy
| |
Collapse
|
10
|
Stankiewicz T. The relationships between transforming growth factors <i>β</i> and free thyroxine and progesterone in the ovarian cysts, preovulatory follicles, and the serum of sows. Arch Anim Breed 2017. [DOI: 10.5194/aab-60-131-2017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Abstract. The aim of the study was to determine the relationships between bone morphogenetic protein 15 (BMP-15) and growth differentiation factor 9 (GDF-9) concentrations and free thyroxine (FT4) and progesterone (P4) concentrations in follicular cysts, preovulatory follicles, and the serum of sows (cyst-bearing (n = 26) and non-cyst-bearing (n = 26)). FT4 and P4 concentrations were higher in the cystic fluid than in the fluid of preovulatory follicles (p < 0.01 and p < 0.05 respectively). BMP-15 and GDF-9 concentrations were higher in the serum of cyst-bearing sows than non-cyst-bearing sows (p < 0.05) and higher in the cystic fluid than in the follicular fluid (p < 0.05). In the cysts and preovulatory follicles, GDF-9 concentration was higher than in serum (p < 0.01). FT4 concentration in the serum of cystic sows was correlated with BMP-15 (r = 0.50, p < 0.05) and GDF-9 (r = 0.62, p < 0.01) concentrations in serum. In the serum of non-cyst-bearing sows, a positive correlation between P4 concentration and BMP-15 concentration (r = 0.60, p < 0.01) was detected. These data will help provide insight into the role of BMP-15, GDF-9, FT4, and P4 during cyst formation in sows.
Collapse
|
11
|
Kangawa A, Otake M, Enya S, Yoshida T, Shibata M. Normal Developmental and Estrous Cycle–dependent Histological Features of the Female Reproductive Organs in Microminipigs. Toxicol Pathol 2017; 45:551-573. [DOI: 10.1177/0192623317710012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The microminipig has become an increasingly attractive animal model for various experimental practices because of its manageable size; however, studies of the histological features of the female reproductive organs in microminipigs are limited. The present study investigates the sexual development of the reproductive organs and the cyclical changes during the estrous cycle in female microminipigs. The ovaries, oviducts, uteri, and vaginal tissues from 33 animals aged 0 to 26 months were utilized in this study. By evaluating the large tertiary follicles, corpora lutea, and the regressing corpora lutea, we estimated that female microminipigs reached puberty at approximately 5 months of age and sexual maturity at 8 months of age. The appearance of the follicles and corpora lutea in the ovaries, as well as the epithelium in other reproductive organs, was synchronized with each phase of the estrous cycle and was identical to that in common domestic pigs. In addition, several spontaneous findings were observed, including mesonephric duct remnants adjacent to oviducts and mineralization in ovaries. Understanding the normal histology of the reproductive organs in microminipigs is crucial for advancing pathological evaluations for future toxicological studies.
Collapse
Affiliation(s)
- Akihisa Kangawa
- Swine and Poultry Department, Shizuoka Prefectural Research Institute of Animal Industry, Swine and Poultry Research Center, Kikugawa, Shizuoka, Japan
| | - Masayoshi Otake
- Swine and Poultry Department, Shizuoka Prefectural Research Institute of Animal Industry, Swine and Poultry Research Center, Kikugawa, Shizuoka, Japan
| | - Satoko Enya
- Swine and Poultry Department, Shizuoka Prefectural Research Institute of Animal Industry, Swine and Poultry Research Center, Kikugawa, Shizuoka, Japan
| | - Toshinori Yoshida
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, Japan
| | - Masatoshi Shibata
- Swine and Poultry Department, Shizuoka Prefectural Research Institute of Animal Industry, Swine and Poultry Research Center, Kikugawa, Shizuoka, Japan
| |
Collapse
|
12
|
Population estimate and morphometry of ovarian preantral follicles from three recently recognized squirrel monkey species: a comparative study. ZYGOTE 2017; 25:279-287. [PMID: 28534450 DOI: 10.1017/s0967199417000107] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
We describe morphological and morphometrical characteristics of preantral ovarian follicles from three recently recognized Saimiri species: S. macrodon, S. cassiquiarensis and S. vanzolinii; the last one a threatened species. Ovaries from four adult monkeys were evaluated: one pair from a pregnant S. macrodon, two ovarian pairs from S. cassiquiarensis females (one of them pregnant), and one left ovary from a senile S. vanzolinii, applying classical histology. Follicular preantral population was quantified and morphology and morphometry of primordial, primary and secondary follicles were evaluated. Follicular preantral population varied among species, being 347,153 in the ovaries of the S. macrodon, 270,342 and 278,376 in the ovaries of both adult non-pregnant and pregnant S. cassiquiarensis females, and 28,149 in the ovary from a senile S. vanzolinii. Most follicles were at primordial or transition stages, except for the senile S. vanzolinii female, which presented the lowest percentages of primordial and transition follicles when compared with primary and secondary ones. Most preantral follicles (>70%) were morphologically normal in the ovaries from all studied S. macrodon and S. cassiquiarensis females, but the ovary of the senile S. vanzolinii female presented a significant decrease in the percentage of normal follicles (primordial: 61%, transition: 52%, primary: 54%, and secondary: 48%). In general, follicular diameter increased significantly from primordial to transition, and subsequently from primary to secondary follicles.
Collapse
|
13
|
Cursino MS, Harriott L, Allen BL, Gentle M, Leung LKP. Do female dingo–dog hybrids breed like dingoes or dogs? AUST J ZOOL 2017. [DOI: 10.1071/zo17005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Hybridisation between animals that breed once (e.g. dingoes) and twice (e.g. domestic dogs) annually may produce offspring that breed either way. This question was investigated by determining the breeding seasonality of female dingo–dog hybrids in south-east Queensland, Australia, through evaluating macroscopic and histological features of 71 female reproductive tracts. All animals were sourced from urban areas where levels of hybridisation are generally high. Most animals trapped in summer were pups less than 6 months of age. A peak of uterus diameter and weight coincided with a peak of corpus luteum in winter. The follicular phase was characterised by growing follicles, ~1–3 mm wide, in late summer and autumn. Only two of the animals (1.4%) showed out-of-season reproductive cycles: one was found with corpus luteum in summer and another in autumn. Our data clearly show that hybrids have a single annual breeding season in winter, exhibiting the same breeding seasonality as dingoes. Our findings are similar to those found in the New Guinea singing dog. Future studies should be conducted to understand and exploit the mechanism and drivers of the breeding seasonality of dingo–dog hybrids to develop more effective management of their populations.
Collapse
|
14
|
Oliveira R, Silva C, Silva E, Gerez J, Santos M, Sarapião F, Sartori L, Bracarense A, Seneda M. Proliferative activity of multi-oocyte follicles in sheep ovaries. Small Rumin Res 2017. [DOI: 10.1016/j.smallrumres.2016.12.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
15
|
Stankiewicz T, Błaszczyk B. Relationship between the concentration of bone morphogenetic protein-15 (BMP-15) and growth differentiation factor-9 (GDF-9) in pre-ovulatory follicles, ovarian cysts and serum in sows. ANIMAL PRODUCTION SCIENCE 2016. [DOI: 10.1071/an14007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The aim of the study was to compare and assess the relationship between peripheral and ovarian bone morphogenetic protein-15 (BMP-15) and growth differentiation factor-9 (GDF-9) concentration in cysts-bearing and non-cysts-bearing sows. The research involved multiparous sows (cysts-bearing sows, n = 20; non-cysts-bearing sows, n = 26). Serum, cystic follicular fluid or fluid from the ovulatory follicles was collected from each of the sows at the time of the slaughter. The collected serum and cystic/follicular fluid samples were tested for BMP-15 and GDF-9 concentrations. BMP-15 and GDF-9 concentrations in fluid from ovarian cysts were significantly higher than in the follicular fluid (P < 0.01). The concentration of BMP-15 and GDF-9 in the serum of sows with cysts was also higher than in ovulating sows (P < 0.05 and P < 0.01, respectively). The concentration of BMP-15 in serum was positively correlated with the concentration of said protein in pre-ovulatory follicles and cysts (r = 0.70; P < 0.01 and r = 0.50; P < 0.05, respectively). A positive correlation was also found between the concentration of serum GDF-9 and cyst GDF-9 (r = 0.55; P < 0.05). Moreover, another positive correlation was detected between the BMP-15 and GDF-9 concentrations, with the highest correlation coefficient recorded in the cyst fluid (r = 0.87; P < 0.01). This study for the first time demonstrates the presence of BMP-15 and GDF-9 in the cyst fluid in sows and determines a positive correlation between the concentration of the above factors in the follicular/cystic fluid and serum. Therefore, it is possible that the determination of BMP-15 and GDF-9 serum concentration may assist diagnosing ovarian cysts in sows. However, it is suggested that further studies involving a more in-depth analysis of the role of BMP-15 and GDF-9 in the pathogenesis of ovarian cysts in pigs are needed.
Collapse
|
16
|
Stankiewicz T. Biochemical composition of the fluid of ovarian cysts and pre-ovulatory follicles compared to the serum in sows. Tierarztl Prax Ausg G Grosstiere Nutztiere 2015; 43:216-21. [PMID: 25948167 DOI: 10.15653/tpg-140836] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Accepted: 01/20/2015] [Indexed: 11/22/2022]
Abstract
OBJECTIVE The objective of this study was to compare the biochemical composition of follicular cysts, pre-ovulatory follicles and serum in sows. MATERIAL AND METHODS The research involved multiparous sows (cysts-bearing sows, n = 21; non-cysts-bearing sows, n = 22). Concentration of glucose, protein, cholesterol (CHOL), high-density lipoprotein (HDL), low-density lipoprotein (LDL) and triacylglycerol (TAG) in the samples was determined. RESULTS Glucose concentration in serum was higher than in cysts and follicles (p < 0.01) and glucose concentration in cysts was higher than in follicles (p < 0.01). Differences were also observed between the concentration of glucose in serum of cysts-bearing and non-cysts-bearing sows (p < 0.01). Protein concentration in cysts and follicles was lower than in serum (p < 0.01). Concentration of cholesterol in the serum of cysts-bearing sows and non-cysts-bearing sows was higher than the one in cysts and follicles (p < 0.01). Cholesterol concentration in the serum of cysts-bearing sows was higher than the one in non-cysts-bearing sows (p < 0.01). Concentration of HDL in serum of both cysts-bearing and non-cysts-bearing sows was also higher than the one in cysts and follicles (p < 0.01). Cysts-bearing sows had a higher concentration of HDL in the serum than non-cysts-bearing sows. Differences were also observed between the concentration of HDL in cysts and the one in follicles (p < 0.05). LDL was determined not to be present in either cysts or pre-ovulatory follicles. TAG concentration in the serum of cysts-bearing sows was higher than the one in the serum of non-cysts-bearing sows (p < 0.05). Differences were also detected between the TAG concentrations in cysts and in follicles (p < 0.01). CONCLUSION The differences in the biochemical composition of the fluid in follicular cysts and pre-ovulatory follicles point to the variable intensification of the course of metabolic processes in pathological and physiological ovarian structures.
Collapse
Affiliation(s)
- T Stankiewicz
- Tomasz Stankiewicz, West Pomeranian University of Technology, Szczecin, Faculty of Biotechnology and Animal Husbandry, Department of Animal Reproduction Biotechnology and Environmental Hygiene, 6 Doktora Judyma Street, 71-466 Szczecin, Poland,
| |
Collapse
|
17
|
Population estimate of the preantral follicles and frequency of multioocyte follicles in prepubertal and adult bitches. Theriogenology 2015; 83:1015-20. [DOI: 10.1016/j.theriogenology.2014.12.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Revised: 10/13/2014] [Accepted: 12/01/2014] [Indexed: 11/20/2022]
|
18
|
Reynaud K, Fontbonne A, Saint-Dizier M, Thoumire S, Marnier C, Tahir MZ, Meylheuc T, Chastant-Maillard S. Folliculogenesis, Ovulation and Endocrine Control of Oocytes and Embryos in the Dog. Reprod Domest Anim 2012; 47 Suppl 6:66-9. [DOI: 10.1111/rda.12055] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2012] [Accepted: 07/21/2012] [Indexed: 11/27/2022]
Affiliation(s)
| | | | | | | | | | | | - T Meylheuc
- INRA; UMR 1319 MICALIS; MIMA2 Imaging Center; Jouy-en-Josas; France
| | | |
Collapse
|
19
|
Lima GL, Santos EAA, Luz VB, Rodrigues APR, Silva AR. Morphological Characterization of the Ovarian Preantral Follicle Population of Collared Peccaries (Tayassu tajacuLinnaeus, 1758). Anat Histol Embryol 2012; 42:304-11. [DOI: 10.1111/ahe.12021] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2012] [Accepted: 11/03/2012] [Indexed: 11/30/2022]
Affiliation(s)
- G. L. Lima
- Laboratório de Conservação de Germoplasma Animal; Universidade Federal Rural do Semi-Árido - UFERSA; BR 110, Km 47, Presidente Costa e Silva; 59625-900; Mossoró; RN; Brazil
| | - E. A. A. Santos
- Laboratório de Conservação de Germoplasma Animal; Universidade Federal Rural do Semi-Árido - UFERSA; BR 110, Km 47, Presidente Costa e Silva; 59625-900; Mossoró; RN; Brazil
| | - V. B. Luz
- Laboratório de Manipulação de Oócitos e Folículos Pré Antrais; Universidade Estadual do Ceará; Av. Paranjana; 1700; Itaperi, Fortaleza; CE; Brazil
| | - A. P. R. Rodrigues
- Laboratório de Manipulação de Oócitos e Folículos Pré Antrais; Universidade Estadual do Ceará; Av. Paranjana; 1700; Itaperi, Fortaleza; CE; Brazil
| | - A. R. Silva
- Laboratório de Conservação de Germoplasma Animal; Universidade Federal Rural do Semi-Árido - UFERSA; BR 110, Km 47, Presidente Costa e Silva; 59625-900; Mossoró; RN; Brazil
| |
Collapse
|
20
|
The potential significance of binovular follicles and binucleate giant oocytes for the development of genetic abnormalities. J Genet 2012; 91:397-404. [DOI: 10.1007/s12041-012-0195-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
21
|
Bertoldo MJ, Holyoake PK, Evans G, Grupen CG. Seasonal variation in the ovarian function of sows. Reprod Fertil Dev 2012; 24:822-34. [DOI: 10.1071/rd11249] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2011] [Accepted: 01/09/2012] [Indexed: 01/10/2023] Open
Abstract
The modern domestic sow exhibits a period of impaired reproductive performance known as seasonal infertility during the late summer and early autumn months. A reduction in farrowing rate due to pregnancy loss is the most economically significant manifestation of this phenomenon. Presently, little is known of the aetiology of seasonal pregnancy loss in the pig. Recent findings represent a major advancement in the understanding of sow reproductive physiology and implicate poor oocyte developmental competence as a contributing factor to pregnancy loss during the seasonal infertility period. It has also been demonstrated that ovarian activity is depressed during the seasonal infertility period. The reduction in oocyte quality is associated with decreased levels of progesterone in follicular fluid during final oocyte maturation in vivo. The recent identification of sow-specific risk factors, such as parity for late pregnancy loss, should improve breeding herd efficiency by allowing producers to tailor management interventions and/or culling protocols that target animals identified as having a greater risk of late pregnancy loss during the seasonal infertility period.
Collapse
|
22
|
Fahiminiya S, Reynaud K, Labas V, Batard S, Chastant-Maillard S, Gérard N. Steroid hormones content and proteomic analysis of canine follicular fluid during the preovulatory period. Reprod Biol Endocrinol 2010; 8:132. [PMID: 21040564 PMCID: PMC2990747 DOI: 10.1186/1477-7827-8-132] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2010] [Accepted: 11/01/2010] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Follicular fluid contains substances involved in follicle activity, cell differentiation and oocyte maturation. Studies of its components may contribute to better understanding of the mechanisms underlying follicular development and oocyte quality. The canine species is characterized by several ovarian activity features that are not extensively described such as preovulatory luteinization, oocyte ovulated at the GV stage (prophase 1) and poly-oocytic follicles. In this study, we examined the hypothesis that the preovulatory LH surge is associated with changes in steroid and protein content of canine follicular fluid prior to ovulation. METHODS Follicular fluid samples were collected from canine ovaries during the preovulatory phase, before (pre-LH; n = 16 bitches) and after (post-LH; n = 16) the LH surge. Blood was simultaneously collected. Steroids were assayed by radioimmunoassay and proteomic analyses were carried out by 2D-PAGE and mass spectrometry. RESULTS The concentrations of 17beta-estradiol and progesterone at the pre-LH stage were 737.2 +/- 43.5 ng/ml and 2630.1 +/- 287.2 ng/ml in follicular fluid vs. 53 +/- 4.1 pg/ml and 3.9 +/- 0.3 ng/ml in plasma, respectively. At that stage, significant positive correlations between follicular size and intra-follicular steroid concentrations were recorded. After the LH peak, the intrafollicular concentration of 17beta-estradiol decreased significantly (48.3 +/- 4.4 ng/ml; p < 0.001), whereas that of progesterone increased (11690.2 +/- 693.6 ng/ml; p < 0.001). Plasmatic concentration of 17beta-estradiol was not modified (49 +/- 9.6 pg/ml) after the LH peak, but that of progesterone significantly increased (9.8 +/- 0.63 ng/ml).Proteomic analysis of canine follicular fluid identified 38 protein spots, corresponding to 21 proteins, some of which are known to play roles in the ovarian physiology. The comparison of 2D-PAGE patterns of follicular fluids from the pre- and post-LH stages demonstrated 3 differentially stained single spot or groups of spots. One of them was identified as complement factor B. A comparison of follicular fluid and plasma protein patterns demonstrated a group of 4 spots that were more concentrated in plasma than in follicular fluid, and a single spot specific to follicular fluid. These proteins were identified as gelsolin and clusterin, respectively. CONCLUSION Our results provide the first demonstration of size-related changes in the steroid concentrations in canine follicular fluid associated with the LH surge. 2D protein mapping allowed identification of several proteins that may play a role in follicle physiology and ovarian activity at the preovulatory stage. This may help in the future to explain and to better understand the species specificities that are described in dogs.
Collapse
Affiliation(s)
- Somayyeh Fahiminiya
- INRA, UMR 6175 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France
- CNRS, UMR6175 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France
- Université François Rabelais de Tours, UMR 6175 Physiologie de la Reproduction et des Comportements, F-37041 Tours, France
- Haras Nationaux, UMR 6175 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France
| | - Karine Reynaud
- INRA, UMR 1198 Biologie du Développement et Reproduction, F-78350 Jouy en Josas, France
- ENVA, UMR 1198 Biologie du Développement et Reproduction, 7 Avenue du Général de Gaulle, F - 94700 Maisons-Alfort, France
| | - Valérie Labas
- INRA, UMR 6175 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France
- CNRS, UMR6175 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France
- Université François Rabelais de Tours, UMR 6175 Physiologie de la Reproduction et des Comportements, F-37041 Tours, France
- Haras Nationaux, UMR 6175 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France
- INRA, UMR 6175 Physiologie de la Reproduction et des Comportements, Plate-forme d'Analyse Intégrative des Biomarqueurs, Laboratoire de Spectrométrie de Masse, F-37380 Nouzilly, France
| | - Séverine Batard
- INRA, UMR 1198 Biologie du Développement et Reproduction, F-78350 Jouy en Josas, France
| | - Sylvie Chastant-Maillard
- INRA, UMR 1198 Biologie du Développement et Reproduction, F-78350 Jouy en Josas, France
- ENVA, UMR 1198 Biologie du Développement et Reproduction, 7 Avenue du Général de Gaulle, F - 94700 Maisons-Alfort, France
- ENVA, Unité de Reproduction, 7 Avenue du Général de Gaulle, F - 94700 Maisons-Alfort, France
| | - Nadine Gérard
- INRA, UMR 6175 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France
- CNRS, UMR6175 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France
- Université François Rabelais de Tours, UMR 6175 Physiologie de la Reproduction et des Comportements, F-37041 Tours, France
- Haras Nationaux, UMR 6175 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France
| |
Collapse
|
23
|
|