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Ramírez Hernández DA, Vieyra Valdez E, Rosas Gavilán G, Linares Culebro R, Espinoza Moreno JA, Chaparro Ortega A, Domínguez Casalá R, Morales-Ledesma L. Role of the superior ovarian nerve in the regulation of follicular development and steroidogenesis in the morning of diestrus 1. J Assist Reprod Genet 2020; 37:1477-1488. [PMID: 32363564 PMCID: PMC7311564 DOI: 10.1007/s10815-020-01787-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Accepted: 04/17/2020] [Indexed: 11/30/2022] Open
Abstract
PURPOSE Little is known about the role of the superior ovarian nerve (SON) in follicular development during the estrus cycle. The aim of the present study was to analyze the role of neural signals arriving through the SON at the ovaries in the regulation of follicular development and ovarian steroid secretion in diestrus 1 of cyclic rats. METHODS Cyclic rats were subjected to left, right, or bilateral SON sectioning or to unilateral or bilateral laparotomy at diestrus 1 at 11:00 h. Animals were sacrificed 24 h after surgery. RESULTS Compared to laparotomized animals, unilateral SON sectioning decreased the number of preovulatory follicles, while bilateral SON sectioning resulted in a decreased number of atretic preantral follicles. An important observation was the presence of invaginations in the follicular wall of large antral and preovulatory follicles in animals with denervation. Furthermore, left SON sectioning increased progesterone levels but decreased testosterone levels, which are effects that were not observed in animals that were subjected to right denervation. CONCLUSIONS At 11:00 h of diestrus 1, the SON was found to stimulate follicle development, possibly via neural signals, such as noradrenaline and/or vasoactive intestinal peptide, and this stimulation induced the formation of follicle-stimulating hormone receptors. The role of the SON in the regulation of ovarian steroid secretion is asymmetric: the left SON inhibits the regulation of progesterone and stimulates testosterone secretion, and the right nerve does not participate in these processes.
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Affiliation(s)
- Deyra A Ramírez Hernández
- Facultad de Estudios Superiores Zaragoza Campus III, UNAM, CP90640, San Miguel Contla, Tlaxcala, Mexico.,Biology of Reproduction Research Unit, Physiology of Reproduction Laboratory, Facultad de Estudios Superiores Zaragoza, UNAM, AP 9-020, CP15000, Mexico, D. F, Mexico
| | - Elizabeth Vieyra Valdez
- Biology of Reproduction Research Unit, Physiology of Reproduction Laboratory, Facultad de Estudios Superiores Zaragoza, UNAM, AP 9-020, CP15000, Mexico, D. F, Mexico
| | - Gabriela Rosas Gavilán
- Biology of Reproduction Research Unit, Physiology of Reproduction Laboratory, Facultad de Estudios Superiores Zaragoza, UNAM, AP 9-020, CP15000, Mexico, D. F, Mexico
| | - Rosa Linares Culebro
- Biology of Reproduction Research Unit, Physiology of Reproduction Laboratory, Facultad de Estudios Superiores Zaragoza, UNAM, AP 9-020, CP15000, Mexico, D. F, Mexico
| | - Julieta A Espinoza Moreno
- Biology of Reproduction Research Unit, Physiology of Reproduction Laboratory, Facultad de Estudios Superiores Zaragoza, UNAM, AP 9-020, CP15000, Mexico, D. F, Mexico
| | - Andrea Chaparro Ortega
- Biology of Reproduction Research Unit, Physiology of Reproduction Laboratory, Facultad de Estudios Superiores Zaragoza, UNAM, AP 9-020, CP15000, Mexico, D. F, Mexico
| | - Roberto Domínguez Casalá
- Biology of Reproduction Research Unit, Physiology of Reproduction Laboratory, Facultad de Estudios Superiores Zaragoza, UNAM, AP 9-020, CP15000, Mexico, D. F, Mexico
| | - Leticia Morales-Ledesma
- Biology of Reproduction Research Unit, Physiology of Reproduction Laboratory, Facultad de Estudios Superiores Zaragoza, UNAM, AP 9-020, CP15000, Mexico, D. F, Mexico.
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Morales-Ledesma L, Vieyra E, Ramírez DA, Trujillo A, Chavira R, Cárdenas M, Domínguez R. Effects on steroid hormones secretion resulting from the acute stimulation of sectioning the superior ovarian nerve to pre-pubertal rats. Reprod Biol Endocrinol 2012; 10:88. [PMID: 23110668 PMCID: PMC3520866 DOI: 10.1186/1477-7827-10-88] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2012] [Accepted: 10/21/2012] [Indexed: 01/04/2023] Open
Abstract
In the adult rat, neural signals arriving to the ovary via the superior ovarian nerve (SON) modulate progesterone (P4), testosterone (T) and estradiol (E2) secretion. The aims of the present study were to analyze if the SON in the pre-pubertal rat also modulates ovarian hormone secretion and the release of follicle stimulating hormone (FSH) and luteinizing (LH) hormone. P4, T, E2, FSH and LH serum levels were measured 30 or 60 minutes after sectioning the SON of pre-pubertal female rats. Our results indicate that the effects on hormone levels resulting from unilaterally or bilaterally sectioning the SON depends on the analyzed hormone, and the time lapse between surgery and autopsy, and that the treatment yielded asymmetric results. The results also suggest that in the pre-pubertal rat the neural signals arriving to the ovaries via the SON regulate the enzymes participating in P4, T and E2 synthesis in a non-parallel way, indicating that the mechanisms regulating the synthesis of each hormone are not regulated by the same signals. Also, that the changes in the steroids hormones are not explained exclusively by the modifications in gonadotropins secretion. The observed differences in hormone levels between rats sacrificed 30 and 60 min after surgery reflect the onset of the compensatory systems regulating hormones secretion.
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Affiliation(s)
- Leticia Morales-Ledesma
- Biology of Reproduction Research Unit. Physiology of Reproduction Laboratory, Facultad de Estudios Superiores Zaragoza, UNAM. AP 9-020, CP15000, México, D.F, Mexico
| | - Elizabeth Vieyra
- Biology of Reproduction Research Unit. Physiology of Reproduction Laboratory, Facultad de Estudios Superiores Zaragoza, UNAM. AP 9-020, CP15000, México, D.F, Mexico
| | - Deyra A Ramírez
- Biology of Reproduction Research Unit. Physiology of Reproduction Laboratory, Facultad de Estudios Superiores Zaragoza, UNAM. AP 9-020, CP15000, México, D.F, Mexico
| | - Angélica Trujillo
- Escuela de Biología, Benemérita Universidad Autónoma de Puebla, Puebla, Mexico
| | - Roberto Chavira
- Instituto Nacional de Ciencias Médicas y Nutrición "Salvador Zubirán", México, D.F, México
| | - Mario Cárdenas
- Instituto Nacional de Ciencias Médicas y Nutrición "Salvador Zubirán", México, D.F, México
| | - Roberto Domínguez
- Biology of Reproduction Research Unit. Physiology of Reproduction Laboratory, Facultad de Estudios Superiores Zaragoza, UNAM. AP 9-020, CP15000, México, D.F, Mexico
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Zhang X, Zhang L, Huo S, Wang J, Cui S. Neonatal superior ovarian nerve transection inhibits follicle development by enhancing follicular atresia and suppressing granulosa cell proliferation in rats. Reprod Fertil Dev 2011; 22:1148-58. [PMID: 20797353 DOI: 10.1071/rd09271] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2009] [Accepted: 03/26/2010] [Indexed: 11/23/2022] Open
Abstract
The ovarian sympathetic nerves participate in the regulation of mammalian ovarian function, but it is still not known whether the neonatal ovarian sympathetic nerve is involved in follicular development and related mechanisms. In the present study, the superior ovarian nerve (SON) of the neonatal rat was transected on postnatal day (PD) 2, and follicle development, ovarian hormone secretion, ovulation rate, granulosa cell proliferation and apoptosis were analysed on PD 30 and PD 90. The results demonstrate that SON transection decreases follicle number and size, reduces ovulation induced by gonadotrophin and enhances follicular atresia. Bromodeoxyuridine (BrdU) and cleaved caspase-3 immunohistochemistry staining provide evidence that SON transection inhibits granulosa cell proliferation and promotes granulosa cell apoptosis. In addition, SON transection increases serum oestradiol levels, but has no influence on serum progesterone levels. These results suggest that the sympathetic nerve supply to the ovaries is important in regulating follicle development and ovary function. These results are critical for further understanding of the neuroendocrine regulation of ovary development and function, although the mechanism needs to be elucidated in future studies.
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Affiliation(s)
- Xiaoxin Zhang
- College of Biological Sciences, China Agricultural University, Beijing 100193, China
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Selstam G, Norjavaara E, Rosberg S, Khan I, Hamberger B, Hamberger L. Catecholamine content and adenylate cyclase activity in corpora lutea of different ages of the PMSG-treated immature rat. Mol Cell Endocrinol 1987; 53:155-60. [PMID: 3666296 DOI: 10.1016/0303-7207(87)90169-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The catecholamine content and adenylate cyclase response were studied in a well-characterized corpus luteum model, where ovulation was induced by treatment of prepubertal Sprague-Dawley rats with pregnant mare's serum gonadotropin. The luteal content of noradrenaline, determined with HPLC, was constant during the first 7 days of pseudopregnancy, followed by a 3-fold increase in older corpora lutea. No detectable amounts of dopamine were found, while trace amounts of adrenaline were found in a few cases. The increase in noradrenaline content was not associated with a changed sensitivity of luteal adenylate cyclase to catecholamines. The response to adrenaline was maximal in 3-day-old corpora lutea, whereafter a decrease was seen. The significance of the increased endogenous levels of noradrenaline at the end of pseudopregnancy is at present unknown. However, the fact that the increase in noradrenaline occurs a few days before spontaneous luteolysis is of special interest, since it has been suggested that an adrenergic innervation is a prerequisite for the antigonadotropic effect of prostaglandin F2 alpha in the human corpus luteum.
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Affiliation(s)
- G Selstam
- Department of Physiology, University of Umeå, Sweden
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Abstract
A review of the rapidly accumulating data in the literature continues to support the notion that catecholamines regulate ovarian function, and extends the complexity of catecholaminergic effects on the ovary via interactions with pituitary and adrenal hormones. It is clear that catecholamines affect growth and differentiation of ovarian follicles, but their role in follicular rupture during ovulation and in corpus luteum function remains unclear. The effects of catecholamines (mediated by membrane receptors) on ovarian function probably should be considered paracrine but classic endocrine regulation of ovarian function cannot be ruled out. Myogenic tonus of ovarian vasculature appears to be regulated by catecholamines, and estrogens may enhance adrenergic receptors in ovarian smooth muscle cells.
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