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Brecchia G, Muça G, Munga A, Menchetti L, Galosi L, Rossi G, Barbato O, Pastorelli G, Agradi S, Serra V, Sulçe M, Ozuni E, Turmalaj L, Castrica M, Ceccarini MR, Riva F, Fioretti B, Quattrone A, Marongiu ML, Curone G. Goji Berry in the Diet of the Rabbit Buck: Effects on Semen Quality, Oxidative Status and Histological Features of the Reproductive Tract. Antioxidants (Basel) 2023; 12:1959. [PMID: 38001812 PMCID: PMC10669443 DOI: 10.3390/antiox12111959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 10/25/2023] [Accepted: 10/30/2023] [Indexed: 11/26/2023] Open
Abstract
Goji berry (GB) shows beneficial effects on human health, although its effects on the male rabbit have been little investigated. This study examines the impact of GB dietary supplementation on the semen traits, antioxidant capacity of seminal plasma, and histological features of the reproductive tract of rabbit buck. Eighteen rabbits were distributed into two dietary groups: one receiving a commercial feed (Control), and the other a feed supplemented with 1% of GB (Goji). After a nutritional adaptation period of 60 days, the animals were subjected to semen collection every 15 days. The semen traits, libido, antioxidant, and inflammatory parameters were collected and analyzed. The rabbits were sacrificed after 60 days, and tissues of the genital tract were analyzed. Compared to the Control group, the Goji group showed higher spermatozoa concentration, motility, and vitality (p < 0.05), as well as fewer abnormal spermatozoa and a higher libido (p < 0.1). Histological features such as functional activity and hyperplasia were improved by GB and correlated with some semen traits (p < 0.05). Conversely, antioxidant and anti-inflammatory parameters were unaffected by the diet. These findings suggest that GB acts on the tissues of the reproductive tract positively influencing semen quality, although further studies are needed to understand the effect on oxidative stress.
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Affiliation(s)
- Gabriele Brecchia
- Department of Veterinary Medicine and Animal Sciences, University of Milan, Via dell’Università 6, 26900 Lodi, Italy; (G.B.); (G.P.); (S.A.); (V.S.); (F.R.); (A.Q.); (G.C.)
| | - Gerald Muça
- Faculty of Veterinary Medicine, Agricultural University of Tirana, Kodër Kamëz, 1029 Tirana, Albania; (G.M.); (A.M.); (M.S.); (E.O.); (L.T.)
| | - Albana Munga
- Faculty of Veterinary Medicine, Agricultural University of Tirana, Kodër Kamëz, 1029 Tirana, Albania; (G.M.); (A.M.); (M.S.); (E.O.); (L.T.)
| | - Laura Menchetti
- School of Biosciences and Veterinary Medicine, University of Camerino, Via Circonvallazione 93/95, 62024 Matelica, Italy;
| | - Livio Galosi
- School of Biosciences and Veterinary Medicine, University of Camerino, Via Circonvallazione 93/95, 62024 Matelica, Italy;
| | - Giacomo Rossi
- School of Biosciences and Veterinary Medicine, University of Camerino, Via Circonvallazione 93/95, 62024 Matelica, Italy;
| | - Olimpia Barbato
- Department of Veterinary Medicine, University of Perugia, Via San Costanzo 4, 06126 Perugia, Italy;
| | - Grazia Pastorelli
- Department of Veterinary Medicine and Animal Sciences, University of Milan, Via dell’Università 6, 26900 Lodi, Italy; (G.B.); (G.P.); (S.A.); (V.S.); (F.R.); (A.Q.); (G.C.)
| | - Stella Agradi
- Department of Veterinary Medicine and Animal Sciences, University of Milan, Via dell’Università 6, 26900 Lodi, Italy; (G.B.); (G.P.); (S.A.); (V.S.); (F.R.); (A.Q.); (G.C.)
| | - Valentina Serra
- Department of Veterinary Medicine and Animal Sciences, University of Milan, Via dell’Università 6, 26900 Lodi, Italy; (G.B.); (G.P.); (S.A.); (V.S.); (F.R.); (A.Q.); (G.C.)
| | - Majlind Sulçe
- Faculty of Veterinary Medicine, Agricultural University of Tirana, Kodër Kamëz, 1029 Tirana, Albania; (G.M.); (A.M.); (M.S.); (E.O.); (L.T.)
| | - Enkeleda Ozuni
- Faculty of Veterinary Medicine, Agricultural University of Tirana, Kodër Kamëz, 1029 Tirana, Albania; (G.M.); (A.M.); (M.S.); (E.O.); (L.T.)
| | - Luigj Turmalaj
- Faculty of Veterinary Medicine, Agricultural University of Tirana, Kodër Kamëz, 1029 Tirana, Albania; (G.M.); (A.M.); (M.S.); (E.O.); (L.T.)
| | - Marta Castrica
- Department of Comparative Biomedicine and Food Science, University of Padova, Agripolis, Viale dell’Università 16, 35020 Legnaro, Italy;
| | | | - Federica Riva
- Department of Veterinary Medicine and Animal Sciences, University of Milan, Via dell’Università 6, 26900 Lodi, Italy; (G.B.); (G.P.); (S.A.); (V.S.); (F.R.); (A.Q.); (G.C.)
| | - Bernard Fioretti
- Department of Chemistry, Biology and Biotechnologies, University of Perugia, Via dell’Elce di Sotto 8, 06123 Perugia, Italy;
| | - Alda Quattrone
- Department of Veterinary Medicine and Animal Sciences, University of Milan, Via dell’Università 6, 26900 Lodi, Italy; (G.B.); (G.P.); (S.A.); (V.S.); (F.R.); (A.Q.); (G.C.)
| | - Maria Laura Marongiu
- Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100 Sassari, Italy;
| | - Giulio Curone
- Department of Veterinary Medicine and Animal Sciences, University of Milan, Via dell’Università 6, 26900 Lodi, Italy; (G.B.); (G.P.); (S.A.); (V.S.); (F.R.); (A.Q.); (G.C.)
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Pan X, Wang X, Shao L, Yang J, Qin F, Li J, Zhang X, Zhai P. The effects of light colour on female rabbit reproductive performance and the expression of key genes in follicular development. J Anim Sci Technol 2022; 64:432-442. [PMID: 35709131 PMCID: PMC9184706 DOI: 10.5187/jast.2022.e31] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 04/16/2022] [Accepted: 04/22/2022] [Indexed: 11/20/2022]
Abstract
The purpose of this study was to analyse the effects of light colour on rabbit
reproductive performance and the expression of key follicular development genes.
Rabbits (n = 1,068, 5 months old, 3.6–4.4 kg live body weight) were
divided randomly into four groups, housed individually in wire mesh cages and
exposed to red, green, blue, and white light-emitting diode (LED) light
(control). The lighting schedule was 16 L : 8 D-15 d / 150 lx / 6:00
am–22:00 pm (3 d preartificial insemination to 12 d postartificial
insemination). Red light and white light affected the conception rate and
kindling rate and increased the total litter size at birth (p
< 0.05). The effects of red light on litter size at weaning, litter
weight at weaning, and individual weight at weaning increased compared with the
green and blue groups. The effects of red light on live litter size at birth
were increased compared with those in the blue group (p
< 0.05). Compared to white light, green and blue light reduced the number
of secondary follicles (p < 0.05). Compared to red
light, green and blue light reduced the number of tertiary follicles
(p < 0.05). Compared with white light, red LED light
resulted in greater ovarian follicle stimulating hormone receptor and
luteinizing hormone receptor mRNA expression (p < 0.05).
Compared with green and blue LED light, red LED light resulted in greater B-cell
lymphom-2 mRNA expression (p < 0.05). Compared with
green LED light, red LED light inhibited FOXO1 mRNA expression in rabbit ovaries
(p < 0.05). Red light can affect the reproductive
performance of female rabbits and the expression of key genes for follicular
development.
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Affiliation(s)
- Xiaoqing Pan
- College of Animal Science and Technology,
Yangzhou University, Jiangsu 225009, China
- Institute of Animal Science, Jiangsu
Academy of Agricultural Sciences, Nanjing 212400, China
| | - Xinglong Wang
- College of Animal Science and Technology,
Yangzhou University, Jiangsu 225009, China
- Corresponding author: Xinglong Wang, College of
Animal Science and Technology, Yangzhou University, Jiangsu 225009, China. Tel:
+86-25-8439-0341, E-mail:
| | - Le Shao
- Institute of Animal Science, Jiangsu
Academy of Agricultural Sciences, Nanjing 212400, China
| | - Jie Yang
- Institute of Animal Science, Jiangsu
Academy of Agricultural Sciences, Nanjing 212400, China
| | - Feng Qin
- Institute of Animal Science, Jiangsu
Academy of Agricultural Sciences, Nanjing 212400, China
| | - Jian Li
- Institute of Animal Science, Jiangsu
Academy of Agricultural Sciences, Nanjing 212400, China
| | - Xia Zhang
- Institute of Animal Science, Jiangsu
Academy of Agricultural Sciences, Nanjing 212400, China
| | - Pin Zhai
- Institute of Animal Science, Jiangsu
Academy of Agricultural Sciences, Nanjing 212400, China
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Abumaghaid MM, Abdelazim AM, Belali TM, Alhujaily M, Saadeldin IM. Shuttle Transfer of mRNA Transcripts via Extracellular Vesicles From Male Reproductive Tract Cells to the Cumulus–Oocyte Complex in Rabbits (Oryctolagus cuniculus). Front Vet Sci 2022; 9:816080. [PMID: 35372562 PMCID: PMC8968341 DOI: 10.3389/fvets.2022.816080] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 01/17/2022] [Indexed: 12/21/2022] Open
Abstract
Semen is known to contain an ovulation-inducing factor (identified as a nerve growth factor, NGF) that shows a significant increase in ovulation after semen deposition in induced ovulatory species. However, the interplay between the male reproductive tract cells and oocyte maturation through messenger RNA (mRNA) cargo is yet to be investigated. Extracellular vesicles (EVs) from the primary culture of rabbit prostate (pEVs), epididymis (eEVs), and testis (tEVs) were isolated to examine their contents for several mRNA transcripts through relative quantitative PCR (RT-qPCR). The expressions of NGF, neurotrophin (NTF3), vascular endothelial growth factor A (VEGFA), A disintegrin and metalloprotease 17 (ADAM17), midkine (MDK), kisspeptin (KISS1), and gonadotrophin-releasing hormone (GNRH1) were examined in isolated EVs. EVs were characterized through transmission electron microscopy. EV uptake by cumulus cell culture was confirmed through microscopic detection of PKH26-stained EVs. Furthermore, the effects of pEVs, eEVs, and tEVs were compared with NGF (10, 20, and 30 ng/ml) supplementation on oocyte in vitro maturation (IVM) and transcript expression. KISS1, NTF3, MDK, ADAM17, GAPDH, and ACTB were detected in all EV types. GNRH1 was detected in tEVs. NGF was detected in pEVs, whereas VEGFA was detected in eEVs. pEVs, eEVs, and 20 ng/ml NGF showed the highest grade of cumulus expansion, followed by tEVs and 10 ng/ml NGF. Control groups and 30 ng/ml NGF showed the least grade of cumulus expansion. Similarly, first polar body (PB) extrusion was significantly increased in oocytes matured with eEVs, pEVs, tEVs, NGF20 (20 ng/ml NGF), NGF10 (10 ng/ml NGF), control, and NGF30 (30 ng/ml NGF). Additionally, the expression of NGFR showed a 1.5-fold increase in cumulus cells supplemented with eEVs compared with the control group, while the expression of PTGS2 (COX2) and NTRK showed 3-fold and 5-fold increase in NGF20-supplemented cumulus-oocyte complexes (COCs), respectively. Oocyte PMP15 expression showed a 1.8-fold increase in IVM medium supplemented with eEVs. Additionally, oocyte NGFR and NTRK expressions were drastically increased in IVM medium supplemented with pEVS (3.2- and 1.6-fold, respectively) and tEVs (4- and 1.7-fold, respectively). This is the first report to examine the presence of mRNA cargo in the EVs of male rabbit reproductive tract cells that provides a model for the stimulation of female rabbits after semen deposition.
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Affiliation(s)
- Mosleh M. Abumaghaid
- Department of Laboratory Medical Sciences, College of Applied Medical Sciences, University of Bisha, Bisha, Saudi Arabia
- *Correspondence: Mosleh M. Abumaghaid
| | - Aaser M. Abdelazim
- Department of Basic Medical Sciences, College of Applied Medical Sciences, University of Bisha, Bisha, Saudi Arabia
| | - Tareg M. Belali
- Department of Laboratory Medical Sciences, College of Applied Medical Sciences, University of Bisha, Bisha, Saudi Arabia
| | - Muhanad Alhujaily
- Department of Laboratory Medical Sciences, College of Applied Medical Sciences, University of Bisha, Bisha, Saudi Arabia
| | - Islam M. Saadeldin
- Laboratory of Theriogenology, College of Veterinary Medicine, Chungnam National University, Daejeon, South Korea
- Research Institute of Veterinary Medicine, Chungnam National University, Daejeon, South Korea
- Department of Physiology, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
- Islam M. Saadeldin
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Maranesi M, Dall’Aglio C, Acuti G, Cappelli K, Trabalza Marinucci M, Galarini R, Suvieri C, Zerani M. Effects of Dietary Polyphenols from Olive Mill Waste Waters on Inflammatory and Apoptotic Effectors in Rabbit Ovary. Animals (Basel) 2021; 11:ani11061727. [PMID: 34207896 PMCID: PMC8228552 DOI: 10.3390/ani11061727] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 06/01/2021] [Accepted: 06/08/2021] [Indexed: 01/02/2023] Open
Abstract
The aim of this study was to evaluate the effect of dietary polyphenols on the expression of the effectors involved in inflammation and apoptosis in rabbit ovary. New Zealand White female rabbits were fed a basal control diet (CTR), or the same diet supplemented with a polyphenolic concentrate (POL, 282.4 mg/kg) obtained from olive mill waste waters. The follicle counts and the relative mRNA (RT-qPCR) and protein (immunohistochemistry) expression of the effectors involved in inflammation (cyclooxygenase-2; interleukin-1beta; tumor necrosis factor-alpha, TNFA) and apoptosis (BCL2-associated X protein, BAX), detected in the ovaries of both groups, were examined. The POL diet increased the primary and total follicles number. Cyclooxygenase-2 gene expression was higher (p < 0.05) in the POL group than in the CTR group, whereas BAX was lower (p < 0.05) in POL than CTR. Immunohistochemistry revealed the presence of all the proteins examined, with weaker (p < 0.05) COX2 and BAX signals in POL. No differences between the CTR and POL groups were observed for IL1B and TNFA gene and protein expression. These preliminary findings show that dietary polyphenols modulate inflammatory and apoptotic activities in rabbit ovary, regulating cyclooxygenase-2 and BAX expression, thus suggesting a functional involvement of these dietary compounds in mammalian reproduction.
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Affiliation(s)
- Margherita Maranesi
- Dipartimento di Medicina Veterinaria, Università di Perugia, via San Costanzo 4, 06126 Perugia, Italy; (M.M.); (C.D.); (M.T.M.); (M.Z.)
| | - Cecilia Dall’Aglio
- Dipartimento di Medicina Veterinaria, Università di Perugia, via San Costanzo 4, 06126 Perugia, Italy; (M.M.); (C.D.); (M.T.M.); (M.Z.)
| | - Gabriele Acuti
- Dipartimento di Medicina Veterinaria, Università di Perugia, via San Costanzo 4, 06126 Perugia, Italy; (M.M.); (C.D.); (M.T.M.); (M.Z.)
- Correspondence: (G.A.); (K.C.)
| | - Katia Cappelli
- Dipartimento di Medicina Veterinaria, Università di Perugia, via San Costanzo 4, 06126 Perugia, Italy; (M.M.); (C.D.); (M.T.M.); (M.Z.)
- Correspondence: (G.A.); (K.C.)
| | - Massimo Trabalza Marinucci
- Dipartimento di Medicina Veterinaria, Università di Perugia, via San Costanzo 4, 06126 Perugia, Italy; (M.M.); (C.D.); (M.T.M.); (M.Z.)
| | - Roberta Galarini
- Istituto Zooprofilattico Sperimentale dell’Umbria e delle Marche “Togo Rosati”, via Gaetano Salvemini 1, 06126 Perugia, Italy;
| | - Chiara Suvieri
- Dipartimento di Medicina e Chirurgia, Sezione di Farmacologia, Università di Perugia, piazzale Severi 1, 06132 Perugia, Italy;
| | - Massimo Zerani
- Dipartimento di Medicina Veterinaria, Università di Perugia, via San Costanzo 4, 06126 Perugia, Italy; (M.M.); (C.D.); (M.T.M.); (M.Z.)
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Zerani M, Polisca A, Boiti C, Maranesi M. Current Knowledge on the Multifactorial Regulation of Corpora Lutea Lifespan: The Rabbit Model. Animals (Basel) 2021; 11:ani11020296. [PMID: 33503812 PMCID: PMC7911389 DOI: 10.3390/ani11020296] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 01/19/2021] [Accepted: 01/21/2021] [Indexed: 12/16/2022] Open
Abstract
Simple Summary Corpora lutea (CL) are temporary endocrine structures that secrete progesterone, which is essential for maintaining a healthy pregnancy. A variety of regulatory factors come into play in modulating the functional lifespan of CL, with luteotropic and luteolytic effects. Many aspects of luteal phase physiology have been clarified, yet many others have not yet been determined, including the molecular and/or cellular mechanisms that maintain the CL from the beginning of luteolysis during early CL development. This paper summarizes our current knowledge of the endocrine and cellular mechanisms involved in multifactorial CL lifespan regulation, using the pseudopregnant rabbit model. Abstract Our research group studied the biological regulatory mechanisms of the corpora lutea (CL), paying particular attention to the pseudopregnant rabbit model, which has the advantage that the relative luteal age following ovulation is induced by the gonadotrophin-releasing hormone (GnRH). CL are temporary endocrine structures that secrete progesterone, which is essential for maintaining a healthy pregnancy. It is now clear that, besides the classical regulatory mechanism exerted by prostaglandin E2 (luteotropic) and prostaglandin F2α (luteolytic), a considerable number of other effectors assist in the regulation of CL. The aim of this paper is to summarize our current knowledge of the multifactorial mechanisms regulating CL lifespan in rabbits. Given the essential role of CL in reproductive success, a deeper understanding of the regulatory mechanisms will provide us with valuable insights on various reproductive issues that hinder fertility in this and other mammalian species, allowing to overcome the challenges for new and more efficient breeding strategies.
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Tzoupis H, Nteli A, Androutsou ME, Tselios T. Gonadotropin-Releasing Hormone and GnRH Receptor: Structure, Function and Drug Development. Curr Med Chem 2021; 27:6136-6158. [PMID: 31309882 DOI: 10.2174/0929867326666190712165444] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 06/18/2019] [Accepted: 06/19/2019] [Indexed: 01/11/2023]
Abstract
BACKGROUND Gonadotropin-Releasing Hormone (GnRH) is a key element in sexual maturation and regulation of the reproductive cycle in the human organism. GnRH interacts with the pituitary cells through the activation of the Gonadotropin Releasing Hormone Receptors (GnRHR). Any impairments/dysfunctions of the GnRH-GnRHR complex lead to the development of various cancer types and disorders. Furthermore, the identification of GnRHR as a potential drug target has led to the development of agonist and antagonist molecules implemented in various treatment protocols. The development of these drugs was based on the information derived from the functional studies of GnRH and GnRHR. OBJECTIVE This review aims at shedding light on the versatile function of GnRH and GnRH receptor and offers an apprehensive summary regarding the development of different agonists, antagonists and non-peptide GnRH analogues. CONCLUSION The information derived from these studies can enhance our understanding of the GnRH-GnRHR versatile nature and offer valuable insight into the design of new more potent molecules.
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Affiliation(s)
| | - Agathi Nteli
- Department of Chemistry, University of Patras, Rion GR-26504, Greece
| | - Maria-Eleni Androutsou
- Vianex S.A., Tatoiou Str., 18th km Athens-Lamia National Road, Nea Erythrea 14671, Greece
| | - Theodore Tselios
- Department of Chemistry, University of Patras, Rion GR-26504, Greece
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Petrucci L, Maranesi M, Verini Supplizi A, Dall’Aglio C, Mandara MT, Quassinti L, Bramucci M, Miano A, Gobbetti A, Catone G, Boiti C, Zerani M. Kisspeptin/GnRH1 system in Leydig cells of horse (Equus caballus): Presence and function. Theriogenology 2020; 152:1-7. [DOI: 10.1016/j.theriogenology.2020.04.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 04/07/2020] [Accepted: 04/07/2020] [Indexed: 12/25/2022]
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Menchetti L, Andoni E, Barbato O, Canali C, Quattrone A, Vigo D, Codini M, Curone G, Brecchia G. Energy homeostasis in rabbit does during pregnancy and pseudopregnancy. Anim Reprod Sci 2020; 218:106505. [PMID: 32507267 DOI: 10.1016/j.anireprosci.2020.106505] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 05/04/2020] [Accepted: 05/05/2020] [Indexed: 12/13/2022]
Abstract
This study was conducted to evaluate the changing concentrations of metabolic hormones and metabolites in pregnant (P) and pseudopregnant (PP) rabbit does. Twenty-five New Zealand White rabbit does were submitted to artificial insemination (AI) and then classified as P (n = 15) or PP (n = 10). Blood samples were collected weekly until day 32 post AI. During pregnancy, leptin concentrations were greater on Days 14 and 21 (P < 0.05), while insulin was greater on days 21 and 32 post AI (P < 0.05) compared to PP does. The triiodothyronine/thyroxine (T3/T4) ratio was greater in the first and last week (P < 0.001); whereas, cortisol concentrations were greater in the last week of pregnancy and after parturition (P < 0.01) compared with that of PP does. Non-esterified fatty acids (NEFA) concentrations increased from day 7 until day 32 post AI (P < 0.05). Glucose concentrations were unchanged throughout pregnancy although concentrations were positively associated with litter size. These results indicate concentrations of hormones and metabolites change during pregnancy to ensure energy requirements are met for both the foetuses and the maternal tissues. Physiological hyperleptinemia, hyperinsulinemia, and changes in cortisol as well as thyroid hormones indicate there is an adaptation of metabolic functions induced by pregnancy. These adaptations could be mediated by gonadal steroids because changes mainly occur in the second half of pregnancy when the profile of the sex hormones differs between P and PP does.
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Affiliation(s)
- Laura Menchetti
- Department of Veterinary Medicine, University of Perugia, Via San Costanzo, 4, 06126 Perugia, Italy
| | - Egon Andoni
- Faculty of Veterinary Medicine, Agricultural University of Albania, Rr Paisi Vodica, Koder, 1029 Kamez, Albania
| | - Olimpia Barbato
- Department of Veterinary Medicine, University of Perugia, Via San Costanzo, 4, 06126 Perugia, Italy
| | - Claudio Canali
- Department of Veterinary Medicine, University of Perugia, Via San Costanzo, 4, 06126 Perugia, Italy
| | - Alda Quattrone
- Department of Veterinary Medicine, University of Perugia, Via San Costanzo, 4, 06126 Perugia, Italy
| | - Daniele Vigo
- Department of Veterinary Medicine, University of Milano, Via dell'Università, 6, 26900 Lodi, Italy
| | - Michela Codini
- Department of Pharmaceutical Sciences, University of Perugia, Via A. Fabretti 48, 06123, Perugia, Italy
| | - Giulio Curone
- Department of Veterinary Medicine, University of Milano, Via dell'Università, 6, 26900 Lodi, Italy
| | - Gabriele Brecchia
- Department of Veterinary Medicine, University of Milano, Via dell'Università, 6, 26900 Lodi, Italy.
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Maranesi M, Petrucci L, Leonardi L, Bufalari A, Parillo F, Boiti C, Zerani M. Kisspeptin/kisspeptin receptor system in pseudopregnant rabbit corpora lutea: presence and function. Sci Rep 2019; 9:5044. [PMID: 30911071 DOI: 10.1038/s41598-019-41623-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Accepted: 03/11/2019] [Indexed: 11/09/2022] Open
Abstract
Kisspeptin (KiSS) and its related receptors (KiSS1R) have a critical role in the reproduction of mammals. The KiSS/KiSS1R system is expressed in numerous reproductive organs including the ovary. Here, we studied the expression of the KiSS/KiSS1R system and its functional role in rabbit corpora lutea (CL) at days 4 (early-), 9 (mid-), and 13 (late-stage) of pseudopregnancy. In vitro progesterone, prostaglandin (PG) F2α (PGF2α) and E2 (PGE2) productions and prostaglandin-endoperoxide synthase 1 (PTGS1) and 2 (PTGS2) activities were evaluated. Immune reactivity (IR) for KiSS and KiSS1R were detected in luteal cells at nuclear and cytoplasmic level at all luteal stage for KiSS and only at early- and mid-stage for KiSS1R; IR decreased from early- to later stages of pseudopregnancy. The KiSS-10 augmented progesterone and PGE2 and diminished PGF2α secretions by early- and mid-CL; KiSS-10 reduced PTGS2 activity at early- and mid-stages, but did not affect PTGS1 at any luteal stages. The antagonist KiSS-234 counteracted all KiSS-10 effects. This study shows that the KiSS/KiSS1R system is expressed in CL of pseudopregnant rabbits and exerts a luteotropic action by down-regulating PTGS2, which decreases PGF2α and increases PGE2 and progesterone.
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Menchetti L, Vecchione L, Filipescu I, Petrescu V, Fioretti B, Beccari T, Ceccarini M, Codini M, Quattrone A, Trabalza-marinucci M, Barbato O, Brecchia G. Effects of Goji berries supplementation on the productive performance of rabbit. Livest Sci 2019; 220:123-8. [DOI: 10.1016/j.livsci.2018.12.016] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Kaya D, Gram A, Kowalewski MP, Schäfer-Somi S, Kuru M, Boos A, Aslan S. Expression of GnRH receptor in the canine corpus luteum, and luteal function following deslorelin acetate-induced puberty delay. Reprod Domest Anim 2017; 52:1104-1112. [PMID: 28963736 DOI: 10.1111/rda.13038] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Accepted: 06/24/2017] [Indexed: 11/28/2022]
Abstract
The goals of this study were as follows: (Experiment 1) to examine the basic capability of canine corpora lutea (CL) to respond to GnRH by assessing expression of gonadotropin-releasing hormone receptor (GnRH-R) in luteal samples collected throughout the luteal lifespan from non-pregnant dogs, and (Experiment 2) to investigate the effects of pre-pubertal application of the GnRH agonist deslorelin acetate on luteal function following the first oestrus. Mature CL were collected during the mid-luteal phase (days 30-45) from treated and control bitches. Transcript levels of several factors were determined: estrogen receptors (ESR1/ERα, ESR2/ERβ), progesterone (P4)-receptor (PGR), prolactin receptor (PRLR), PGE2-synthase (PTGES) and PGE2 receptors (PTGER2/EP2, PTGER4/EP4), vascular endothelial growth factor (VEGFA) and VEGF receptors (VEGFR1 and VEGFR2), cyclooxygenase 2 (COX2/PTGS2), steroidogenic acute regulatory protein (STAR) and 3β-hydroxysteroid dehydrogenase (3βHSD). Additionally, levels of Kisspeptin 1 (Kiss1) and its receptor (KISS1-R) were evaluated. Although generally low, GnRH-R expression was time dependent and was elevated during early dioestrus, with a significant decrease towards luteal regression. In deslorelin-treated and control dogs, its expression was either low or frequently below the detection limit. EP2 and VEGFR1 were higher in the treated group, which could be caused by a feedback mechanism after long-term suppression of reproductive activity. Despite large individual variations, 3βHSD was higher in the deslorelin-treated group. This, along with unchanged STAR expression, was apparently not mirrored in increased luteal functionality, because similar P4 levels were detected in both groups. Finally, the deslorelin-mediated long-term delay of puberty does not have negative carry-over effects on subsequent ovarian functionality in bitches.
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Affiliation(s)
- D Kaya
- Department of Obstetrics and Gynecology, Faculty of Veterinary Medicine, University of Kafkas, Kars, Turkey
| | - A Gram
- Vetsuisse Faculty, Institute of Veterinary Anatomy, University of Zurich, Zurich, Switzerland
| | - M P Kowalewski
- Vetsuisse Faculty, Institute of Veterinary Anatomy, University of Zurich, Zurich, Switzerland
| | - S Schäfer-Somi
- Platform for Artificial Insemination and Embryo Transfer, Vetmeduni Vienna, Vienna, Austria
| | - M Kuru
- Department of Obstetrics and Gynecology, Faculty of Veterinary Medicine, University of Kafkas, Kars, Turkey
| | - A Boos
- Vetsuisse Faculty, Institute of Veterinary Anatomy, University of Zurich, Zurich, Switzerland
| | - S Aslan
- Department of Obstetrics and Gynecology, Veterinary Faculty, Near East University, Nicosia, North Cyprus, Turkey
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Parillo F, Maranesi M, Mignini F, Marinelli L, Di Stefano A, Boiti C, Zerani M. Evidence for a dopamine intrinsic direct role in the regulation of the ovary reproductive function: in vitro study on rabbit corpora lutea. PLoS One 2014; 9:e104797. [PMID: 25148384 PMCID: PMC4141718 DOI: 10.1371/journal.pone.0104797] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2013] [Accepted: 07/17/2014] [Indexed: 12/18/2022] Open
Abstract
Dopamine (DA) receptor (DR) type 1 (D1R) has been found to be expressed in luteal cells of various species, but the intrinsic role of the DA/DRs system on corpora lutea (CL) function is still unclear. Experiments were devised to characterize the expression of DR types and the presence of DA, as well as the in vitro effects of DA on hormone productions by CL in pseudopregnant rabbits. Immunoreactivity and gene expression for D1R decreased while that for D3R increased in luteal and blood vessel cells from early to late pseudopregnant stages. DA immunopositivity was evidenced only in luteal cells. The DA and D1R agonist increased in vitro release of progesterone and prostaglandin E2 (PGE2) by early CL, whereas the DA and D3R agonist decreased progesterone and increased PGF2α in vitro release by mid- and late CL. These results provide evidence that the DA/DR system exerts a dual modulatory function in the lifespan of CL: the DA/D1R is luteotropic while the DA/D3R is luteolytic. The present data shed new light on the physiological mechanisms regulating luteal activity that might improve our ability to optimize reproductive efficiency in mammal species, including humans.
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Affiliation(s)
- Francesco Parillo
- Scuola di Bioscienze e Medicina veterinaria, Università di Camerino, Matelica, Italy
| | - Margherita Maranesi
- Dipartimento di Scienze biopatologiche veterinarie ed Igiene delle produzioni animali e alimentari, Sezione di Fisiologia, Università di Perugia, Perugia, Italy
| | - Fiorenzo Mignini
- Scuola del Farmaco e dei Prodotti della salute, Università di Camerino, Camerino, Italy
| | - Lisa Marinelli
- Dipartimento di Farmacia, Università “G. D'Annunzio”, Chieti, Italy
| | | | - Cristiano Boiti
- Dipartimento di Scienze biopatologiche veterinarie ed Igiene delle produzioni animali e alimentari, Sezione di Fisiologia, Università di Perugia, Perugia, Italy
| | - Massimo Zerani
- Scuola di Bioscienze e Medicina veterinaria, Università di Camerino, Matelica, Italy
- * E-mail:
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Sirotkin AV, Chrenek P, Kolesarová A, Parillo F, Zerani M, Boiti C. Novel regulators of rabbit reproductive functions. Anim Reprod Sci 2014; 148:188-96. [DOI: 10.1016/j.anireprosci.2014.06.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2013] [Revised: 05/20/2014] [Accepted: 06/01/2014] [Indexed: 11/26/2022]
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14
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Lan R, Liu F, He Z, Chen C, Liu S, Shi Y, Liu Y, Yoshimura Y, Zhang M. Immunolocalization of GnRHRI, gonadotropin receptors, PGR, and PGRMCI during follicular development in the rabbit ovary. Theriogenology 2014; 81:1139-47. [DOI: 10.1016/j.theriogenology.2014.01.043] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Revised: 01/10/2014] [Accepted: 01/31/2014] [Indexed: 01/24/2023]
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Parillo F, Maranesi M, Brecchia G, Gobbetti A, Boiti C, Zerani M. In vivo chronic and in vitro acute effects of di(2-ethylhexyl) phthalate on pseudopregnant rabbit corpora lutea: possible involvement of peroxisome proliferator-activated receptor gamma. Biol Reprod 2014; 90:41. [PMID: 24403546 DOI: 10.1095/biolreprod.113.109223] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
The in vivo chronic and in vitro acute effects of di(2-ethylhexyl) phthalate (DEHP) on the reproductive function of peroxisome proliferator-activated receptor gamma (PPARG) were studied in rabbit corpora lutea (CL) at early stage (Day 4), midstage (Day 9), and late stage (Day 13) of pseudopregnancy. The rabbits were in vivo treated with DEHP for 15 days before induction of pseudopregnancy. Immunohistochemistry provided evidence for the presence of PPARG, prostaglandin endoperoxide synthase 1 (PTGS1), PTGS2, prostaglandin E2-9-ketoreductase (PGE2-9-K), and 3beta-hydroxysteroid dehydrogenase (3beta-HSD) in all the luteal cells during pseudopregnancy. DEHP decreased progesterone plasma levels and CL production in all the luteal stages and PPARG protein and gene expressions in early and mid-CL. DEHP in vivo treatment reduced PTGS2 protein expression at the late stage and that of PGE2-9-K at all the stages, whereas PTGS1 and 3beta-HSD were not affected. In in vitro cultured CL, DEHP alone, the PPARG antagonist T0070907 alone, or DEHP plus T0070907 diminished progesterone production and 3beta-HSD activity and increased PGF2alpha and PTGS2 in early and mid-CL, whereas DEHP plus the PPARG agonist 15d-PGJ2 did not affect these hormones and enzymes. All the in vitro treatments did not affect PGE2 secretion as well as PTGS1 and PGE2-9-K enzymatic activities in all the luteal stages. These results provided evidence that DEHP favors functional luteolysis of pseudopregnant rabbit CL, with a mechanism that seems to involve PPARG expression down-regulation, an increase of PTGS2 activity and prostaglandin F2alpha secretion, 3beta-HSD down-regulation, and decrease in progesterone.
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Affiliation(s)
- Francesco Parillo
- Scuola di Scienze mediche veterinarie, Università di Camerino, Matelica, Italy
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Parillo F, Zerani M, Maranesi M, Dall'Aglio C, Galeati G, Brecchia G, Boiti C, González-Mariscal G. Ovarian hormones and fasting differentially regulate pituitary receptors for estrogen and gonadotropin-releasing hormone in rabbit female. Microsc Res Tech 2013; 77:201-10. [DOI: 10.1002/jemt.22328] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2013] [Revised: 12/08/2013] [Accepted: 12/14/2013] [Indexed: 11/08/2022]
Affiliation(s)
- F. Parillo
- Scuola di Bioscienze e Medicina veterinaria; Università di Camerino; 62024 Matelica Italy
| | - M. Zerani
- Scuola di Bioscienze e Medicina veterinaria; Università di Camerino; 62024 Matelica Italy
| | - M. Maranesi
- Dipartimento di Scienze biopatologiche ed Igiene delle produzioni animali e alimentari; Laboratorio di Biotecnologie fisiologiche, Sezione di Fisiologia veterinaria, Università di Perugia; 06126 Perugia Italy
| | - C. Dall'Aglio
- Dipartimento di Scienze biopatologiche ed Igiene delle produzioni animali e alimentari; Laboratorio di Biotecnologie fisiologiche, Sezione di Fisiologia veterinaria, Università di Perugia; 06126 Perugia Italy
| | - G. Galeati
- Dipartimento di Scienze mediche veterinarie; Università di Bologna; 40064 Ozzano Emilia Italy
| | - G. Brecchia
- Dipartimento di Scienze biopatologiche ed Igiene delle produzioni animali e alimentari; Laboratorio di Biotecnologie fisiologiche, Sezione di Fisiologia veterinaria, Università di Perugia; 06126 Perugia Italy
| | - C. Boiti
- Dipartimento di Scienze biopatologiche ed Igiene delle produzioni animali e alimentari; Laboratorio di Biotecnologie fisiologiche, Sezione di Fisiologia veterinaria, Università di Perugia; 06126 Perugia Italy
| | - G. González-Mariscal
- Centro de Investigación en Reproducción Animal CINVESTAV; Universidad Autónoma de Tlaxcala-CINVESTAV; Tlaxcala Mexico
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Parillo F, Dall’Aglio C, Brecchia G, Maranesi M, Polisca A, Boiti C, Zerani M. Aglepristone (RU534) effects on luteal function of pseudopregnant rabbits: Steroid receptors, enzymatic activities, and hormone productions in corpus luteum and uterus. Anim Reprod Sci 2013; 138:118-32. [DOI: 10.1016/j.anireprosci.2013.02.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2012] [Revised: 01/31/2013] [Accepted: 02/07/2013] [Indexed: 11/30/2022]
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Zerani M, Maranesi M, Brecchia G, Gobbetti A, Boiti C, Parillo F. Evidence for a luteotropic role of peroxisome proliferator-activated receptor gamma: expression and in vitro effects on enzymatic and hormonal activities in corpora lutea of pseudopregnant rabbits. Biol Reprod 2013; 88:62. [PMID: 23365414 DOI: 10.1095/biolreprod.112.107383] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
The expression of peroxisome proliferator-activated receptor gamma (PPARgamma) and its role in corpora lutea (CL) function were studied in pseudopregnant rabbits. Corpora lutea were collected at an early stage (Day 4), midstage (Day 9), and late stage (Day 13) of pseudopregnancy. Immunohistochemistry found evidence for the presence of PPARgamma in the perinuclear cytoplasm and nucleus of all the luteal cells; immunoreactivity decreased from the early to the late stage, with immunonegativity of the nuclei of late stage CL. PPARgamma mRNA transcript was expressed in all the luteal stages with the lowest level in the late stage. In CL cultured in vitro, the PPARgamma agonist (15-deoxy delta12,14 prostaglandin J2 [15d-PGJ2], 200 nM) increased and the antagonist (T0070907, 50 nM) decreased progesterone secretion at early and midluteal stages, whereas 15d-PGJ2 reduced and T0070907 increased PGF2alpha at the same stages. Prostaglandin-endoperoxide synthase 2 (PTGS2) activity was reduced by 15d-PGJ2 and increased by T0070907 in CL of early and midluteal stages. Conversely, 15d-PGJ2 increased and T0070907 reduced 3beta-hydroxysteroid dehydrogenase (3beta-HSD) activity in early and midluteal stage CL. PGE2 in vitro secretion as well as PTGS1 and 20alpha-HSD enzymatic activities were not affected by 15d-PGJ2 and T0070907 in any CL types. These results indicate that PPARgamma plays a luteotropic role in pseudopregnant rabbits, through PTGS2 down-regulation and 3beta-HSD up-regulation, with a consequent PGF2alpha decrease and progesterone increase.
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Affiliation(s)
- Massimo Zerani
- Scuola di Scienze mediche veterinarie, Università di Camerino, Matelica, Italy.
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Parillo F, Catone G, Maranesi M, Gobbetti A, Gasparrini B, Russo M, Boiti C, Zerani M. Immunolocalization, gene expression, and enzymatic activity of cyclooxygenases, prostaglandin e2-9-ketoreductase, and nitric oxide synthases in mediterranean buffalo (bubalus bubalis) corpora lutea during diestrus. Microsc Res Tech 2012; 75:1682-90. [DOI: 10.1002/jemt.22116] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2012] [Accepted: 07/17/2012] [Indexed: 11/06/2022]
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Zerani M, Catone G, Maranesi M, Gobbetti A, Boiti C, Parillo F. Gonadotropin-Releasing Hormone 1 Directly Affects Corpora Lutea Lifespan in Mediterranean Buffalo (Bubalus bubalis) During Diestrus: Presence and In Vitro Effects on Enzymatic and Hormonal Activities1. Biol Reprod 2012; 87:45. [DOI: 10.1095/biolreprod.112.099598] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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Meints AN, Pemberton JG, Chang JP. Nitric oxide and guanylate cyclase signalling are differentially involved in gonadotrophin (LH) release responses to two endogenous GnRHs from goldfish pituitary cells. J Neuroendocrinol 2012; 24:1166-81. [PMID: 22487215 DOI: 10.1111/j.1365-2826.2012.02323.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Nitric oxide synthase (NOS) immunoreactivity is present in goldfish gonadotrophs. The present study investigated whether two native goldfish gonadotrophin-releasing hormones (GnRHs), salmon (s)GnRH and chicken (c)GnRH-II, use NOS/nitric oxide (NO) and soluble guanylate cyclase (sGC)/cyclic (c)GMP/protein kinase G (PKG) signalling to stimulate maturational gonadotrophin [teleost gonadotrophin-II, luteinising hormone (LH)] release. In cell column perifusion experiments with dispersed goldfish pituitary cells, the application of three NOS inhibitors (aminoguanidine hemisulphate, 1400W and 7-nitroindazole) and two NO scavengers [2-phenyl-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide (PTIO) and rutin hydrate] reduced sGnRH-elicited, but not cGnRH-II-induced, LH increases. The NO donor sodium nitroprusside (SNP) increased NO production in goldfish pituitary cells in static incubation. SNP-stimulated LH release in column perifusion was attenuated by PTIO and the sGC inhibitor 1H-(1,2,4)oxadiazolo[4,3-a]quinoxalin-1-oneon (ODQ), and additive to responses elicited by cGnRH-II, but not sGnRH. ODQ and the PKG inhibitor KT5823 decreased sGnRH- and cGnRH-II-stimulated LH release. Similarly, the LH response to dibutyryl cGMP was reduced by KT5823. These results indicate that, although only sGnRH uses the NOS/NO pathway to stimulate LH release, both GnRHs utilise sGC/PKG to increase LH secretion.
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Affiliation(s)
- A N Meints
- Department of Biological Sciences, University of Alberta, Edmonton, AB, Canada
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Dal Bosco A, Rebollar P, Boiti C, Zerani M, Castellini C. Ovulation induction in rabbit does: Current knowledge and perspectives. Anim Reprod Sci 2011; 129:106-17. [DOI: 10.1016/j.anireprosci.2011.11.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2011] [Revised: 11/15/2011] [Accepted: 11/20/2011] [Indexed: 01/14/2023]
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Current world literature. Curr Opin Obstet Gynecol 2011; 23:301-5. [PMID: 21734502 DOI: 10.1097/GCO.0b013e3283491e27] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Guelfi G, Zerani M, Brecchia G, Parillo F, Dall'Aglio C, Maranesi M, Boiti C. Direct actions of ACTH on ovarian function of pseudopregnant rabbits. Mol Cell Endocrinol 2011; 339:63-71. [PMID: 21466837 DOI: 10.1016/j.mce.2011.03.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2011] [Revised: 03/21/2011] [Accepted: 03/24/2011] [Indexed: 12/29/2022]
Abstract
The present study sought to assess whether the receptors for adrenocorticotropic hormone (ACTH), MC2R, and for glucocorticoid (GR) are expressed in corpora lutea (CL) of pseudopregnant rabbits and whether ACTH and cortisol exert any direct action on luteal function. By immunohistochemistry, positive reaction for MC2R and GR was detectable within luteal cells of CL. The MC2R mRNA levels were five-fold less abundant in day 9 than in day 4 CL (P<0.01). At both stages, ACTH agonist (ACTH 1-24) increased progesterone and prostaglandin (PG) E(2) (PGE(2)) (P<0.01), but reduced PGF(2α) releases (P<0.01) in vitro. ACTH 1-24 injection increased plasma cortisol levels within 4h (P<0.01), but decreased (P<0.01) progesterone 24h later and for the following two days. ACTH administration to estrous rabbits caused a transitory increase in blood progesterone concentrations (P<0.01). Daily injections of ACTH did not modify progesterone profile following ovulation. In conclusion, ACTH directly up-regulates CL progesterone production in vitro via MC2R, but indirectly hampers luteal function via cortisol-GR associated mechanism.
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Affiliation(s)
- Gabriella Guelfi
- Department of Biopathological Science and Hygiene of Animal and Alimentary Production, Section of Physiology, Laboratory of Physiologic Biotechnology, University of Perugia, Italy
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