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Morales L, Vallcaneras S, Delsouc MB, Filippa V, Aguilera-Merlo C, Fernández M, Casais M. Neuromodulatory effect of GnRH from coeliac ganglion on luteal regression in the late pregnant rat. Cell Tissue Res 2021; 384:487-498. [PMID: 33779845 DOI: 10.1007/s00441-021-03436-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Accepted: 02/18/2021] [Indexed: 12/29/2022]
Abstract
The GnRH/GnRH receptor system has been found in several extrapituitary tissues, although its physiological significance has not yet been well established. Taking into account that the peripheral neural system can act as a modulator of pregnancy corpus luteum, the objective was to physiologically investigate the presence of the GnRH system in coeliac ganglion (CG) and to analyse its possible involvement in luteal regression through the superior ovarian nerve (SON) at the end of pregnancy in the rat. The integrated ex vivo CG-SON-Ovary system of rats on day 21 of pregnancy was used. Cetrorelix (CTX), a GnRH receptor antagonist, was added into the ganglionic compartment while the control systems were untreated. Ganglionic GnRH release was detected under basal conditions. Then, the CTX addition in CG increased it, which would indicate the blockade of the receptor. In turn, CTX in CG caused an increase in ovarian progesterone release. Furthermore, the luteal cells showed an increase in the expression of Hsd3b1 and a decrease in the expression of Akr1c3 (progesterone synthesis and degradation enzymes, respectively), reduced TUNEL staining according to an increase in the antioxidant defence system activity and low lipid peroxide levels. The ovarian and ganglionic nitric oxide (NO) release increased, while the luteal nitrotyrosine content, measured as nitrosative stress marker, decreased. CTX in CG decreased the ovarian noradrenaline release. The present study provides evidence that GnRH from CG may trigger neuronal signals that promote the luteal regression in late pregnancy by affecting the release of NO and noradrenaline in the ovary.
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Affiliation(s)
- Laura Morales
- Laboratorio de Biología de la Reproducción (LABIR), Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Instituto Multidisciplinario de Investigaciones Biológicas de San Luis (IMIBIO-SL-CONICET), Av. Ejército de los Andes 950, D5700HHW, San Luis, Argentina
| | - Sandra Vallcaneras
- Laboratorio de Biología de la Reproducción (LABIR), Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Instituto Multidisciplinario de Investigaciones Biológicas de San Luis (IMIBIO-SL-CONICET), Av. Ejército de los Andes 950, D5700HHW, San Luis, Argentina
| | - María Belén Delsouc
- Laboratorio de Biología de la Reproducción (LABIR), Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Instituto Multidisciplinario de Investigaciones Biológicas de San Luis (IMIBIO-SL-CONICET), Av. Ejército de los Andes 950, D5700HHW, San Luis, Argentina
| | - Verónica Filippa
- Histología, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Av. Ejército de los Andes 950, Bloque I, Piso No. 1, 5700, San Luis, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), 5700, San Luis, Argentina
| | - Claudia Aguilera-Merlo
- Histología, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Av. Ejército de los Andes 950, Bloque I, Piso No. 1, 5700, San Luis, Argentina
| | - Marina Fernández
- Instituto de Biología y Medicina Experimental (IBYME-CONICET), V. de Obligado 2490, C1428ADN, Buenos Aires, Argentina
| | - Marilina Casais
- Laboratorio de Biología de la Reproducción (LABIR), Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Instituto Multidisciplinario de Investigaciones Biológicas de San Luis (IMIBIO-SL-CONICET), Av. Ejército de los Andes 950, D5700HHW, San Luis, Argentina.
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Bourne TH, Hagström HG, Hahlin M, Josefsson B, Granberg S, Hellberg P, Hamberger L, Collins WP. Ultrasound studies of vascular and morphological changes in the human corpus luteum during the menstrual cycle**Supported by the Swedish Medical Research Council, Stockholm, Sweden (project grant no. B95-17x-11237-01A; fellowship to T.H.B. grant no. 2873).††Presented in part at the 3rd International Meeting of the European Society of Endosonography in Gynecology and Obstetrics, Göteborg, Sweden, May 31 to June 3, 1995. Fertil Steril 1996. [DOI: 10.1016/s0015-0282(16)58209-0] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Agren PL, Selstam G, Norjavaara E, Kinnander G, Knutsson A. Studies of the luteinization process in the rat: development of catecholamine response on progesterone production during the peri-ovulatory period. ACTA PHYSIOLOGICA SCANDINAVICA 1988; 134:143-8. [PMID: 3149136 DOI: 10.1111/j.1748-1716.1988.tb08470.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The present study was undertaken to investigate whether pre-ovulatory follicles have an adrenergic response in terms of progesterone production. Extirpated pre-ovulatory follicles obtained both before and after the endogenous gonadotropin surge and newly formed corpora lutea were obtained from the PMSG rat ovulatory model. Follicles and corpora lutea were incubated for 120 min in MEM with Earle's salt and 10 mM Hepes, 37 degrees C, pH 7.4 and 100% oxygen, with 30 microM noradrenaline or 10 micrograms ml-1 LH-B9). Pre-ovulatory follicles were barely stimulable by noradrenaline, while newly formed corpora lutea responded markedly. Luteinizing hormone (LH) levels significantly increased progesterone accumulation in all groups. In order to determine whether preovulatory follicles need intact surrounding tissue for an adrenergic response on progesterone production, pieces of ovaries containing pre-ovulatory follicles were incubated. No significant effect of noradrenaline or adrenaline was seen, while LH had a substantial effect. The results show that catecholamines acutely exert a selective effect on steroidogenesis in the ovary with a marked stimulatory effect on corpora lutea and a marginal effect on the pre-ovulatory follicle.
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Affiliation(s)
- P L Agren
- Department of Physiology, University of Umeå, Sweden
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