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Martinez CA, Rizos D, Rodriguez-Martinez H, Funahashi H. Oocyte-cumulus cells crosstalk: New comparative insights. Theriogenology 2023; 205:87-93. [PMID: 37105091 DOI: 10.1016/j.theriogenology.2023.04.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 04/08/2023] [Accepted: 04/10/2023] [Indexed: 04/29/2023]
Abstract
Mammalian follicles are constituted of a complex structure composed of several layers of granulosa cells surrounding the oocyte and of theca cells that reside beneath its basement membrane. During folliculogenesis, granulosa cells separate into two anatomically and functionally distinct sub-types; the mural cells lining the follicle wall and the oocyte-surrounding cumulus cells, i.e. those in intimate metabolic contact with the oocyte. The cumulus cells connecting with the oocyte have trans-zonal cytoplasmic projections which, penetrating the zona pellucida, form the cumulus-oocyte complex. The connections through gap junctions allow the transfer of small molecules between oocyte and cumulus cells, such as ions, metabolites, and amino acids necessary for oocyte growth, as well as small regulatory molecules that control oocyte development. The bi-directional communication between the oocyte and cumulus cells is crucial for the development and functions of both cell types. Our current knowledge of the relationship between the oocyte and its surrounding cumulus cells continues to change as we gain a greater understanding of factors regulating oocyte development and folliculogenesis. This review will mainly focus on the reciprocal interaction between oocytes and cumulus cells during the latter stages of follicle development i.e. through antral development to periovulatory events including oocyte maturation, expansion, and degradation of the cumulus matrix.
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Affiliation(s)
- Cristina A Martinez
- Department of Animal Science, Okayama University, Okayama, Japan; Department of Animal Reproduction, INIA-CSIC, Madrid, Spain; Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden.
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González-Gómez M, Reyes R, Damas-Hernández MDC, Plasencia-Cruz X, González-Marrero I, Alonso R, Bello AR. NTS, NTSR1 and ERs in the Pituitary-Gonadal Axis of Cycling and Postnatal Female Rats after BPA Treatment. Int J Mol Sci 2023; 24:ijms24087418. [PMID: 37108581 PMCID: PMC10138486 DOI: 10.3390/ijms24087418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 04/12/2023] [Accepted: 04/15/2023] [Indexed: 04/29/2023] Open
Abstract
The neuropeptide neurotensin (NTS) is involved in regulating the reproductive axis and is expressed at each level of this axis (hypothalamus-pituitary-gonads). This dependence on estrogen levels has been widely demonstrated in the hypothalamus and pituitary. We focused on confirming the relationship of NTS with estrogens and the gonadal axis, using a particularly important environmental estrogenic molecule, bisphenol-A (BPA). Based on the experimental models or in vitro cell studies, it has been shown that BPA can negatively affect reproductive function. We studied for the first time the action of an exogenous estrogenic substance on the expression of NTS and estrogen receptors in the pituitary-gonadal axis during prolonged in vivo exposure. The exposure to BPA at 0.5 and 2 mg/kg body weight per day during gestation and lactation was monitored through indirect immunohistochemical procedures applied to the pituitary and ovary sections. Our results demonstrate that BPA induces alterations in the reproductive axis of the offspring, mainly after the first postnatal week. The rat pups exposed to BPA exhibited accelerated sexual maturation to puberty. There was no effect on the number of rats born per litter, although the fewer primordial follicles suggest a shorter fertile life.
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Affiliation(s)
- Miriam González-Gómez
- Departamento de Ciencias Médicas Básicas, Área de Anatomía Humana, Facultad de Ciencias de la Salud, Universidad de La Laguna, 38200 La Laguna, Spain
- Instituto de Tecnologías Biomédicas (ITB), 38200 La Laguna, Spain
- Instituto Universitario de Neurociencia (IUNE), Universidad de La Laguna, 38200 La Laguna, Spain
| | - Ricardo Reyes
- Instituto de Tecnologías Biomédicas (ITB), 38200 La Laguna, Spain
- Departamento de Bioquímica, Microbiología, Biología Celular y Genética, Área de Biología Celular, Facultad de Ciencias, Sección de Biología, Universidad de La Laguna, 38200 La Laguna, Spain
- Instituto de Enfermedades Tropicales y Salud Pública de Canarias (IUETSP), 38296 La Laguna, Spain
| | | | - Xiomara Plasencia-Cruz
- Departamento de Ciencias Médicas Básicas, Área de Anatomía Humana, Facultad de Ciencias de la Salud, Universidad de La Laguna, 38200 La Laguna, Spain
| | - Ibrahim González-Marrero
- Departamento de Ciencias Médicas Básicas, Área de Anatomía Humana, Facultad de Ciencias de la Salud, Universidad de La Laguna, 38200 La Laguna, Spain
- Instituto Universitario de Neurociencia (IUNE), Universidad de La Laguna, 38200 La Laguna, Spain
| | - Rafael Alonso
- Instituto de Tecnologías Biomédicas (ITB), 38200 La Laguna, Spain
- Departamento de Ciencias Médicas Básicas, Área de Fisiología, Facultad de Ciencias de la Salud, Universidad de La Laguna, 38200 La Laguna, Spain
| | - Aixa R Bello
- Departamento de Bioquímica, Microbiología, Biología Celular y Genética, Área de Biología Celular, Facultad de Ciencias, Sección de Biología, Universidad de La Laguna, 38200 La Laguna, Spain
- Instituto de Enfermedades Tropicales y Salud Pública de Canarias (IUETSP), 38296 La Laguna, Spain
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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.
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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
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Hishikawa Y, Takizawa T, Koji T. In focus in HCB: new histochemical insights into mammalian gametogenesis. Histochem Cell Biol 2022; 157:269-271. [PMID: 35230484 DOI: 10.1007/s00418-022-02083-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- Yoshitaka Hishikawa
- Department of Anatomy, Histochemistry and Cell Biology, Faculty of Medicine, University of Miyazaki, Miyazaki, 889-1692, Japan
| | - Toshihiro Takizawa
- Department of Molecular Medicine and Anatomy, Nippon Medical School, Tokyo, 113-8602, Japan
| | - Takehiko Koji
- Office of Research Initiative and Development, Nagasaki University, Nagasaki, 852-8521, Japan.
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