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Yang L, Yan C, Tao S, He Y, Zhao J, Wang Y, Wu Y, Liu N, Qin Y. In Vivo Imaging of Rabbit Follicles through Combining Ultrasound Bio-Microscopy and Intravital Window. Animals (Basel) 2024; 14:1727. [PMID: 38929346 PMCID: PMC11200761 DOI: 10.3390/ani14121727] [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: 04/21/2024] [Revised: 05/28/2024] [Accepted: 05/30/2024] [Indexed: 06/28/2024] Open
Abstract
Continuous ovarian imaging has been proven to be a method for monitoring the development of follicles in vivo. The aim of this study was to evaluate the efficacy of combining ultrasound bio-microscopy (UBM) with an intravital window for follicle imaging in rabbits and to monitor the ovarian dynamic processes. New Zealand White female rabbits (n = 10) received ovarian translocation to a subcutaneous position. The ovarian tissue was sutured onto the abdominal muscles and covered with an intravital window for the continuous monitoring of the follicles using UBM. Results show that physiological changes (red blood cell and white blood cell counts, feed intake, and body weight change) in rabbits induced by surgery returned to normal physiological levels in one week. Furthermore, UBM could provide high-resolution imaging of follicles through the intravital window. Daily monitoring of ovarian dynamic processes for 6 days displayed variabilities in follicle counts and size. Collectively, these results provide a relatively new method to monitor ovarian dynamic processes and to understand the reproductive physiology of female rabbits.
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Affiliation(s)
- Lihan Yang
- State Key Laboratory of Animal Nutrition and Feeding, China Agricultural University, Beijing 100193, China; (L.Y.); (C.Y.); (S.T.); (Y.H.); (J.Z.); (Y.W.); (Y.W.)
- National Engineering Laboratory for Animal Breeding, China Agricultural University, Beijing 100193, China
| | - Chang Yan
- State Key Laboratory of Animal Nutrition and Feeding, China Agricultural University, Beijing 100193, China; (L.Y.); (C.Y.); (S.T.); (Y.H.); (J.Z.); (Y.W.); (Y.W.)
- National Engineering Laboratory for Animal Breeding, China Agricultural University, Beijing 100193, China
| | - Siming Tao
- State Key Laboratory of Animal Nutrition and Feeding, China Agricultural University, Beijing 100193, China; (L.Y.); (C.Y.); (S.T.); (Y.H.); (J.Z.); (Y.W.); (Y.W.)
- National Engineering Laboratory for Animal Breeding, China Agricultural University, Beijing 100193, China
| | - Yifeilong He
- State Key Laboratory of Animal Nutrition and Feeding, China Agricultural University, Beijing 100193, China; (L.Y.); (C.Y.); (S.T.); (Y.H.); (J.Z.); (Y.W.); (Y.W.)
- National Engineering Laboratory for Animal Breeding, China Agricultural University, Beijing 100193, China
| | - Jing Zhao
- State Key Laboratory of Animal Nutrition and Feeding, China Agricultural University, Beijing 100193, China; (L.Y.); (C.Y.); (S.T.); (Y.H.); (J.Z.); (Y.W.); (Y.W.)
- National Engineering Laboratory for Animal Breeding, China Agricultural University, Beijing 100193, China
| | - Yanya Wang
- State Key Laboratory of Animal Nutrition and Feeding, China Agricultural University, Beijing 100193, China; (L.Y.); (C.Y.); (S.T.); (Y.H.); (J.Z.); (Y.W.); (Y.W.)
- National Engineering Laboratory for Animal Breeding, China Agricultural University, Beijing 100193, China
| | - Yingjie Wu
- State Key Laboratory of Animal Nutrition and Feeding, China Agricultural University, Beijing 100193, China; (L.Y.); (C.Y.); (S.T.); (Y.H.); (J.Z.); (Y.W.); (Y.W.)
- National Engineering Laboratory for Animal Breeding, China Agricultural University, Beijing 100193, China
| | - Ning Liu
- State Key Laboratory of Animal Nutrition and Feeding, China Agricultural University, Beijing 100193, China; (L.Y.); (C.Y.); (S.T.); (Y.H.); (J.Z.); (Y.W.); (Y.W.)
- National Engineering Laboratory for Animal Breeding, China Agricultural University, Beijing 100193, China
| | - Yinghe Qin
- State Key Laboratory of Animal Nutrition and Feeding, China Agricultural University, Beijing 100193, China; (L.Y.); (C.Y.); (S.T.); (Y.H.); (J.Z.); (Y.W.); (Y.W.)
- National Engineering Laboratory for Animal Breeding, China Agricultural University, Beijing 100193, China
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Viudes-de-Castro MP, Marco Jimenez F, Vicente JS. Reproductive Performance of Female Rabbits Inseminated with Extenders Supplemented with GnRH Analogue Entrapped in Chitosan-Based Nanoparticles. Animals (Basel) 2023; 13:ani13101628. [PMID: 37238058 DOI: 10.3390/ani13101628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 05/10/2023] [Accepted: 05/11/2023] [Indexed: 05/28/2023] Open
Abstract
Rabbit is a reflexively ovulating species. Accordingly, in the practice of artificial insemination (AI) ovulation must be induced via exogenous GnRH (Gonadotropin-Releasing Hormone) administration, which may be performed intramuscularly, subcutaneously, or intravaginally. Unfortunately, the bioavailability of the GnRH analogue when added to the extender is lower due to the proteolytic activity in the seminal plasma and the poor permeability of the vaginal mucosa. The aim of the study was to refine the practice of AI practice in rabbits by replacing parenteral GnRH analogue administration (subcutaneous, intravenous, or intramuscular injection) with intravaginal application, while reducing its concentration in the diluent. Extenders containing the buserelin acetate in chitosan-dextran sulphate and chitosan-alginate nanoparticles were designed and 356 females were inseminated. Reproductive performance of females inseminated with the two experimental extenders, receiving 4 μg of buserelin acetate intravaginally per doe, was compared with that in the control group, the does of which were inseminated with the extender without the GnRH analogue and induced to ovulate with 1 μg of buserelin acetate administered intramuscularly. The entrapment efficiency of the chitosan-dextran sulphate complex was higher than that of chitosan-alginate. However, females inseminated with both systems showed similar reproductive performance. We conclude that both nanoencapsulation systems are an efficient way of intravaginal ovulation induction, allowing a reduction in the level of the GnRH analogue normally used in seminal doses from 15-25 μg to 4 μg.
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Affiliation(s)
- Maria Pilar Viudes-de-Castro
- Centro de Investigación y Tecnología Animal, Instituto Valenciano de Investigaciones Agrarias (CI-TA-IVIA), Polígono La Esperanza No. 100, 12400 Segorbe, Spain
| | - Francisco Marco Jimenez
- Instituto de Ciencia y Tecnología Animal, Universitat Politècnica de València, 46022 Valencia, Spain
| | - José Salvador Vicente
- Instituto de Ciencia y Tecnología Animal, Universitat Politècnica de València, 46022 Valencia, Spain
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Mattioli S, Maranesi M, Castellini C, Dal Bosco A, Arias-Álvarez M, Lorenzo PL, Rebollar PG, García-García RM. Physiology and modulation factors of ovulation in rabbit reproduction management. WORLD RABBIT SCIENCE 2021. [DOI: 10.4995/wrs.2021.13184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
Rabbit is an induced ovulatory species, so ovulation takes place after mating. Traditionally, exogenous and synthetic hormonal factors (administered by intramuscular and intravaginal route) such as GnRH and analogues, or different physical procedures (i.e. stimulation by intravaginal cannula) have been used to induce ovulation in females when artificial insemination is applied in rabbit farms. Restriction and public rejection of the use of hormones is leading to the study of the seminal plasma components with potential action on ovulation induction. The aim of the present review is to collect and summarise the strategies used in recent years to trigger ovulation and improve rabbit fertility management with respect to more animal-friendly manipulation methods. Furthermore, special attention has been paid to the use of a semen component (as endogen molecule) such as beta nerve growth factor (β-NGF) in male and female rabbit reproductive physiology. This neurotrophin and its receptors (TrKA and p75NTR) are abundantly distributed in both male and female rabbit reproductive tracts, and it seems to have an important physiological role in sperm maturation and behaviour (velocity, apoptosis and capacitation), as well as a modulatory factor of ovulation. Endogen β-NGF is diluted in the seminal doses with the extenders; hence it could be considered an innovative and alternative strategy to avoid the current exogenous (by intramuscular route) and stressful hormonal treatments used in ovulation induction. Their addition in seminal dose could be more physiological and improve animal welfare in rabbit farms.
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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] [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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Carrasco RA, Pezo S, Adams GP. Evidence for the LH-releasing pathway of seminal plasma NGF in male camelids. Theriogenology 2021; 164:100-104. [PMID: 33582512 DOI: 10.1016/j.theriogenology.2021.01.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 01/19/2021] [Accepted: 01/20/2021] [Indexed: 12/14/2022]
Abstract
In the female camelid, systemic administration of NGF induces a preovulatory LH surge that results in ovulation, but the effects of seminal NGF in the male are unknown. In the present study, we tested the hypothesis that the LH-releasing pathway of NGF is present in male camelids. In Experiment 1, male llamas and alpacas were treated with NGF or GnRH (n = 2 llamas and 3 alpacas) and blood samples were collected from 1 h before to 3 h after treatment. Plasma LH concentrations increased after treatment in a surge-like fashion in both GnRH- and NGF-treated groups, but concentrations reached a maximum 2.5 times higher and remained elevated for at least 2 h longer in the NGF-treated group (treatment-by-time interaction, P = 0.01). In Experiment 2, we evaluated the LH and testosterone response to NGF vs saline treatment (n = 3 llamas and 3 alpacas). The LH response to NGF was similar to that in Experiment 1, and plasma testosterone concentrations were higher in the NGF group than in the saline group at 2, 4 and 6 h after treatment (P < 0.05). Results support the hypothesis that the LH-releasing pathway for NGF exists in male South American camelids. The LH response to NGF sustained circulating testosterone concentrations in llamas, suggesting a moderate role of NGF in testosterone secretion.
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Affiliation(s)
- Rodrigo A Carrasco
- Department of Veterinary Biomedical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus drive, Saskatoon, S7N5B4, Canada
| | - Sergio Pezo
- Department of Veterinary Biomedical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus drive, Saskatoon, S7N5B4, Canada
| | - Gregg P Adams
- Department of Veterinary Biomedical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus drive, Saskatoon, S7N5B4, Canada.
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Laghouati A, Belabbas R, Castellini C, Mattioli S, Dal Bosco A, Benberkane A, Iguer-Ouada M. Impact of Algerian date palm pollen aqueous extract on epididymal and ejaculated rabbit sperm motility during in vitro incubation. ITALIAN JOURNAL OF ANIMAL SCIENCE 2021. [DOI: 10.1080/1828051x.2021.1911696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Amel Laghouati
- University Blida1, Laboratory of Biotechnologies related to Animal Reproduction, Institute of Veterinary Sciences, University Blida1, Blida, Algeria
| | - Rafik Belabbas
- University Blida1, Laboratory of Biotechnologies related to Animal Reproduction, Institute of Veterinary Sciences, University Blida1, Blida, Algeria
| | - Cesare Castellini
- Dipartimento di Scienze Agrarie, Alimentaried Ambientali, University of Perugia, Perugia, Italy
| | - Simona Mattioli
- Dipartimento di Scienze Agrarie, Alimentaried Ambientali, University of Perugia, Perugia, Italy
| | - Alessandro Dal Bosco
- Dipartimento di Scienze Agrarie, Alimentaried Ambientali, University of Perugia, Perugia, Italy
| | - Amine Benberkane
- Associated Laboratory in Marine Ecosystems and Aquaculture, Department of Biological Sciences of the Environment, Faculty of Nature and Life Sciences, Bejaia University, street Targua Ouzemmour, 06000 Bejaia Algeria
| | - Mokrane Iguer-Ouada
- Associated Laboratory in Marine Ecosystems and Aquaculture, Department of Biological Sciences of the Environment, Faculty of Nature and Life Sciences, Bejaia University, street Targua Ouzemmour, 06000 Bejaia Algeria
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Effect of ovarian stimulation by different gonadotrophin treatments on in vivo and in vitro reproductive efficiency of rabbit does under high ambient temperature. Trop Anim Health Prod 2020; 53:22. [PMID: 33216269 DOI: 10.1007/s11250-020-02429-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Accepted: 10/06/2020] [Indexed: 02/07/2023]
Abstract
Non-lactating multiparous NZW rabbit does (n = 227) were used in two experiments. In the 1st experiment (n = 87), does were i.m. injected with 0.1-ml saline/doe in day 0 (control, n = 29). Other does were injected with 25 IU equine chorionic gonadotrophin (eCG), followed by 0.2-ml gonadotrophin-releasing hormone (GnRH, n = 29) or 75 IU human chorionic gonadotrophin (hCG, n = 29) per doe 48 h later. After 60 h of day 0, does in all groups were artificially inseminated (AI). In the 2nd experiment, does (n = 140) were mated (AI) after synchronization of estrus/ovulation with 25 IU eCG, and 75 IU hCG 48 h later. On day 5 post-AI, does were injected with saline (control), 75 IU hCG, 0.2 ml GnRH, or 25 IU eCG per doe. Injection of eCG with GnRH or hCG pre-AI significantly increased corpora lutea number, ovulation rate, total number/doe and recovery rate of embryos, viable embryos, hatched blastocysts, in vivo reproductive parameters, and concentration of progesterone and progesterone/estradiol 17-β ratio. Injection of eCG on day 5 post-AI significantly improved large and total follicle number, and in vivo reproductive efficiency. The corpora lutea number and impantation sites were significantly increased in the hCG and eCG groups. Fetal loss rate significantly increased only in the GnRH group. Under high ambient temperature, administration of eCG with hCG or GnRH injection pre-AI could be synchronized estrus/ovulation for improving in vivo and in vitro embryo production. In addition, pregnancy outcomes could be enhanced in rabbit does induced to ovulation by a single eCG or hCG dose on day 5 post-AI.
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8
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Differential sympathetic response to lesion-induced chronic kidney disease in rabbits. Kidney Int 2020; 98:906-917. [DOI: 10.1016/j.kint.2020.03.039] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 03/17/2020] [Accepted: 03/26/2020] [Indexed: 01/29/2023]
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Pavlicev M, Zupan AM, Barry A, Walters S, Milano KM, Kliman HJ, Wagner GP. An experimental test of the ovulatory homolog model of female orgasm. Proc Natl Acad Sci U S A 2019; 116:20267-20273. [PMID: 31570579 PMCID: PMC6789565 DOI: 10.1073/pnas.1910295116] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
The ovulatory homolog model of female orgasm posits that the neuro-endocrine mechanisms underlying female orgasm evolved from and are homologous to the mechanisms mediating copulation-induced ovulation in some mammals. This model predicts that pharmacological agents that affect human orgasm, such as fluoxetine, should also affect ovulation in animals with copulation-induced ovulation, such as rabbits. We tested this prediction by treating rabbits with daily doses of fluoxetine for 2 wk and found that fluoxetine treatment reduces the number of ovulations postcopulation by 30%. In a second experiment we tested whether this result was mediated by an effect on the brain or via peripheral serotonin functions. We treated animals with fluoxetine and induced ovulation with a single injection of human chorionic gonadotropin. In this experiment ovulation rate was nominally reduced by only 8%, which is statistically not significant. We conclude that the effect of fluoxetine on copulation-induced ovulation rate supports the ovulatory homolog model of female orgasm, suggesting that female orgasm has very deep evolutionary roots among the early eutherian mammals.
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Affiliation(s)
- Mihaela Pavlicev
- Department of Pediatrics, College of Medicine, University of Cincinnati, Cincinnati, OH 45267
- Department of Philosophy, University of Cincinnati, Cincinnati, OH 45221
- Center for Preterm Birth, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229
| | - Andreja Moset Zupan
- Center for Preterm Birth, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229
| | - Amanda Barry
- Department of Pediatrics, College of Medicine, University of Cincinnati, Cincinnati, OH 45267
| | - Savannah Walters
- Veterinary Services Surgical Core, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229
| | - Kristin M Milano
- Department of Obstetrics, Gynecology and Reproductive Sciences, Yale Medical School, New Haven, CT 06510
| | - Harvey J Kliman
- Department of Obstetrics, Gynecology and Reproductive Sciences, Yale Medical School, New Haven, CT 06510
| | - Günter P Wagner
- Department of Obstetrics, Gynecology and Reproductive Sciences, Yale Medical School, New Haven, CT 06510;
- Department of Ecology and Evolutionary Biology, Yale University, New Haven, CT 06520
- Yale Systems Biology Institute, Yale University, West Haven, CT 06516
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Maranesi M, Petrucci L, Leonardi L, Piro F, Rebollar PG, Millán P, Cocci P, Vullo C, Parillo F, Moura A, Mariscal GG, Boiti C, Zerani M. New insights on a NGF-mediated pathway to induce ovulation in rabbits (Oryctolagus cuniculus). Biol Reprod 2019; 98:634-643. [PMID: 29438491 DOI: 10.1093/biolre/ioy041] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Accepted: 02/07/2018] [Indexed: 12/26/2022] Open
Abstract
To investigate the ovulatory mechanisms triggered by raw semen (RS) in rabbits, we examined the expression of nerve growth factor (NGF)-a supposed ovulation-inducing factor (OIF)-and cognate receptors in anterior pituitary, ovary, and cervix as well as plasma NGF and luteinizing hormone (LH) concentrations. Six does/group were sham-inseminated with sterile saline (PBS), naturally mated (NM), inseminated with RS alone or after lumbar anesthesia (ARS), or treatment with COX inhibitors (CIRS). Immunohistochemistry revealed positive signals for NGF and receptors in all tissues. RT-PCR confirmed the presence of the target transcripts in the same tissues, except NTRK1 in the cervix. Circulating NGF concentrations rose 3- to 6-fold (P < 0.01) 15 min after semen deposition into the genital tract of NM, RS, and ARS rabbits and remained sustained thereafter. Circulating NGF was 4-fold lower (P < 0.01) in CIRS than in RS does indicating that NGF is mainly synthesized by the uterus. A concomitant rise of LH and NGF concentrations was found in 83.3%, 50.0%, and 16.7% of NM, RS, and CIRS does, respectively, but not in ARS (despite high NGF circulating levels). Seminal plasma NGF concentration was 151.9 ± 9.25 μg/mL. The ovulatory responses were 0%, 83.3%, 66.7%, 16.7%, and 0% in PBS, NM, RS, ARS, and CIRS groups, respectively. Present data confirm that, although RS may induce ovulation via endocrine mechanisms through binding to NGF receptors in the ovary, a novel OIF-mediated neural mechanism facilitates ovulation in rabbits.
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Affiliation(s)
- Margherita Maranesi
- Dipartimento di Medicina Veterinaria, Università degli Studi di Perugia, Perugia, Italy
| | - Linda Petrucci
- Dipartimento di Medicina Veterinaria, Università degli Studi di Perugia, Perugia, Italy
| | - Leonardo Leonardi
- Dipartimento di Medicina Veterinaria, Università degli Studi di Perugia, Perugia, Italy
| | - Federica Piro
- Dipartimento di Medicina Veterinaria, Università degli Studi di Perugia, Perugia, Italy
| | | | - Pilar Millán
- Departamento de Fisiología (Fisiología animal), Facultad de Veterinaria, Universidad Complutense de Madrid, Madrid, Spain
| | - Paolo Cocci
- Scuola di Bioscienze e Medicina Veterinaria, Università degli Studi di Camerino, Matelica, Italy
| | - Cecilia Vullo
- Scuola di Scienze del Farmaco e dei Prodotti della Salute, Università degli Studi di Camerino, Camerino, Italy
| | - Francesco Parillo
- Scuola di Bioscienze e Medicina Veterinaria, Università degli Studi di Camerino, Matelica, Italy
| | - Arlindo Moura
- Departamento de Zootecnia, Universidade Federal do Ceará, Fortaleza, Brazil
| | - Gabriela Gonzalez Mariscal
- Centro de Investigación en Reproducción Animal, CINVESTAV-Universidad Autónoma de Tlaxcala, Tlaxcala, Mexico
| | - Cristiano Boiti
- Dipartimento di Medicina Veterinaria, Università degli Studi di Perugia, Perugia, Italy
| | - Massimo Zerani
- Dipartimento di Medicina Veterinaria, Università degli Studi di Perugia, Perugia, Italy.,Scuola di Bioscienze e Medicina Veterinaria, Università degli Studi di Camerino, Matelica, Italy
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Munari C, Ponzio P, Alkhawagah AR, Schiavone A, Mugnai C. Effects of an intravaginal GnRH analogue administration on rabbit reproductive parameters and welfare. Theriogenology 2018; 125:122-128. [PMID: 30414565 DOI: 10.1016/j.theriogenology.2018.10.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 10/26/2018] [Accepted: 10/27/2018] [Indexed: 11/25/2022]
Abstract
On commercial farms, rabbit does are subjected to a reproductive rhythm that does not account for their welfare or physiology, leading to reduced longevity and consequently high annual replacement. The European Food Safety Authority (EFSA) recommends limited and infrequent use of hormone treatments, and suggests replacement with alternative methods that do not threaten animal welfare when possible. In the present study, we aimed to determine whether the GnRH analogue lecirelin acetate could be administered by inclusion in the seminal dose during insemination. Twenty 9-month-old does (Grigio del Monferrato, autochthonous Italian breed),each having two previous deliveries, were individually housed and divided into two groups at artificial insemination. The control group received 0.2 mL of intramuscular lecirelin (Dalmarelin, Fatro®, Italy) prior to insemination. The intravaginal group was inseminated with a seminal dose that included 0.3 mL Dalmarelin. The experiment was performed for six consecutive reproductive cycles at 42-day intervals, and included a total of 120 inseminations. Prior to each insemination, the heterospermic pooled semen samples were assessed for sperm motility and morphology. Each ejaculate was divided into two samples, with and without lecirelin addition. Compared to the control group, the does with intravaginal Dalmarelin administration showed equal or greater sexual receptivity, which resulted in a higher fertility rate over increasing cycles. The seminal dose volume was very low, possibly explaining the better results in the intravaginal group, which received a similar amount of hormone (0.3 mL/doe) as the control group (0.2 mL/doe). The negative performance of the control group may have also been due to anti-GnRH formation, and the more stressful method of ovulation induction. The number of live-born kits did not significantly differ between groups. Progressive motility was significantly positively correlated with motility characteristics, including VAP, VSL, ALH, BCF, STR, and LIN. Overall, our present findings supported that the incorporation of GnRH in a seminal dose could be used for ovulation induction in rabbit does. Further studies should identify the optimal dose of GnRH for intravaginal administration, taking into account that the intravaginal absorption capacity is about 10 times smaller than the intramuscular absorption capacity.
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Affiliation(s)
- C Munari
- Department of Veterinary Sciences, University of Turin, Largo Braccini 2, 10095, Grugliasco, TO, Italy.
| | - P Ponzio
- Department of Veterinary Sciences, University of Turin, Largo Braccini 2, 10095, Grugliasco, TO, Italy
| | - A R Alkhawagah
- Theriogenology Department, Faculty of Veterinary Medicine, Benha University, Egypt
| | - A Schiavone
- Department of Veterinary Sciences, University of Turin, Largo Braccini 2, 10095, Grugliasco, TO, Italy
| | - C Mugnai
- Department of Veterinary Sciences, University of Turin, Largo Braccini 2, 10095, Grugliasco, TO, Italy
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Casares-Crespo L, Fernández-Serrano P, Vicente J, Mocé E, Castellini C, Stabile A, Viudes-de-Castro M. Insemination extender supplementation with bestatin and EDTA has no effect on rabbit reproductive performance. Theriogenology 2018; 105:61-65. [DOI: 10.1016/j.theriogenology.2017.09.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Revised: 09/05/2017] [Accepted: 09/08/2017] [Indexed: 10/18/2022]
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13
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Postcopulatory Reproductive Strategies in Spermatozoa. DIVERSITY AND COMMONALITY IN ANIMALS 2018. [DOI: 10.1007/978-4-431-56609-0_22] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Abstract
Disorders of the reproductive tract are common in rabbits. Conditions are different in rabbits that are farmed for their meat or fur and those that are kept as pets. Farmed rabbits suffer from infections and diseases associated with pregnancy. Congenital abnormalities are more likely to be recognized and treated in pet rabbits. Pet rabbits suffer from age-related changes to their genital tract (hyperplasia, neoplasia, or hernias). Neutering is an important part of prevention and treatment of reproductive disorders. Knowledge of normal male and female reproductive anatomy is essential to prevent complications. These are described and illustrated.
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Rodríguez-Castelán J, Anaya-Hernández A, Méndez-Tepepa M, Martínez-Gómez M, Castelán F, Cuevas-Romero E. Distribution of thyroid hormone and thyrotropin receptors in reproductive tissues of adult female rabbits. Endocr Res 2017; 42:59-70. [PMID: 27268091 DOI: 10.1080/07435800.2016.1182185] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
PURPOSE Thyroid dysfunctions are related to anovulation, miscarriages, and infertility in women and laboratory animals. Mechanisms associated with these effects are unknown, although indirect or direct actions of thyroid hormones and thyrotropin could be assumed. The present study aimed to identify the distribution of thyroid hormones (TRs) and thyrotropin (TSHR) receptors in reproductive organs of female rabbits. MATERIAL AND METHODS Ovary of virgin and pregnant rabbits, as well as the oviduct, uterus, and vagina of virgin rabbits were excised, histologically processed, and cut. Slices from these organs were used for immunohistochemical studies for TRα1-2, TRß1, and TSHR. RESULTS The presence of TRs and TSHR was found in the primordial, primary, secondary, tertiary, and Graafian follicles of virgin rabbits, as well as in the corpora lutea, corpora albicans, and wall of hemorrhagic cysts of pregnant rabbits. Oviductal regions (fimbria-infundibulum, ampulla, isthmus, and utero-tubal junction), uterus (endometrium and myometrium), and vagina (abdominal, pelvic, and perineal portions) of virgin rabbits showed anti-TRs and anti-TSHR immunoreactivity. Additionally, the distal urethra, paravaginal ganglia, levator ani and iliococcygeus muscles, dorsal nerve and body of the clitoris, perigenital skin, and prostate had TRs and TSHR. CONCLUSIONS The wide presence of TRs and TSHR in female reproductive organs suggests varied effects of thyroid hormones and thyrotropin in reproduction.
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Affiliation(s)
| | | | - Maribel Méndez-Tepepa
- c Maestría en Ciencias Biológicas , Universidad Autónoma de Tlaxcala , Tlaxcala , México
| | - Margarita Martínez-Gómez
- d Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México , México-DF , México
- e Centro Tlaxcala de Biología de la Conducta , Universidad Autónoma de Tlaxcala , Tlaxcala , México
| | - Francisco Castelán
- d Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México , México-DF , México
- e Centro Tlaxcala de Biología de la Conducta , Universidad Autónoma de Tlaxcala , Tlaxcala , México
| | - Estela Cuevas-Romero
- e Centro Tlaxcala de Biología de la Conducta , Universidad Autónoma de Tlaxcala , Tlaxcala , México
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16
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Sperm Storage in the Female Reproductive Tract: A Conserved Reproductive Strategy for Better Fertilization Success. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 1001:173-186. [DOI: 10.1007/978-981-10-3975-1_11] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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17
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Abstract
This chapter provides an introduction to animals that are commonly used for research. It presents information on basic care topics such as biology, behavior, housing, feeding, sexing, and breeding of these animals. The chapter provides some insight into the reasons why these animals are used in research. It also gives an overview of techniques that can be utilized to collect blood or to administer drugs or medicine. Each section concludes with a brief description of how to recognize abnormal signs, in addition to lists of various diseases.
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18
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Naturil-Alfonso C, Lavara R, Millán P, Rebollar P, Vicente J, Marco-Jiménez F. Study of failures in a rabbit line selected for growth rate. WORLD RABBIT SCIENCE 2016. [DOI: 10.4995/wrs.2016.4016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
<p>Selection for growth rate is negatively related with reproductive fitness. The aim of this work was to analyse the causes of fertility failure in rabbit does selected for growth rate and characterised for reproductive deficiencies (line R). In the experiment, 82 does were divided into 2 groups: naturally mated (NM) and artificially inseminated (AI), to relate luteinizing hormone (LH) concentration with ovulation induction and pregnancy rate by laparoscopic determination. Additionally, in 38 of these females ovulation rate and metabolites determination (leptin, NEFA, BOHB and glucose) were analysed and perirenal fat thickness measurement and live body weight (LBW) determined. The results showed that all ovulated does (both NM and AI) presented higher concentrations of LH than non-ovulated females. In addition, non-ovulated females showed high levels of leptin and BOHB, as well as LBW. Females from line R have an inherit reduced fertility due to ovulation failure as a consequence of a reduction in LH release, which could be explained by a heavier body weight and higher leptin concentrations.</p>
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19
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Does the inclusion of protease inhibitors in the insemination extender affect rabbit reproductive performance? Theriogenology 2016; 85:928-932. [DOI: 10.1016/j.theriogenology.2015.10.044] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Revised: 10/28/2015] [Accepted: 10/31/2015] [Indexed: 11/18/2022]
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20
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Geyer A, Daub L, Otzdorff C, Reese S, Braun J, Walter B. Reversible estrous cycle suppression in prepubertal female rabbits treated with slow-release deslorelin implants. Theriogenology 2016; 85:282-7. [DOI: 10.1016/j.theriogenology.2015.09.037] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Revised: 09/15/2015] [Accepted: 09/15/2015] [Indexed: 11/25/2022]
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21
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Matsuzaki M, Mizushima S, Hiyama G, Hirohashi N, Shiba K, Inaba K, Suzuki T, Dohra H, Ohnishi T, Sato Y, Kohsaka T, Ichikawa Y, Atsumi Y, Yoshimura T, Sasanami T. Lactic acid is a sperm motility inactivation factor in the sperm storage tubules. Sci Rep 2015; 5:17643. [PMID: 26619826 PMCID: PMC4664960 DOI: 10.1038/srep17643] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Accepted: 11/03/2015] [Indexed: 12/23/2022] Open
Abstract
Although successful fertilization depends on timely encounters between sperm and egg, the decoupling of mating and fertilization often confers reproductive advantages to internally fertilizing animals. In several vertebrate groups, postcopulatory sperm viability is prolonged by storage in specialized organs within the female reproductive tract. In birds, ejaculated sperm can be stored in a quiescent state within oviductal sperm storage tubules (SSTs), thereby retaining fertilizability for up to 15 weeks at body temperature (41 °C); however, the mechanism by which motile sperm become quiescent within SSTs is unknown. Here, we show that low oxygen and high lactic acid concentrations are established in quail SSTs. Flagellar quiescence was induced by lactic acid in the concentration range found in SSTs through flagellar dynein ATPase inactivation following cytoplasmic acidification (<pH 6.0). The long-term preservation of sperm morphology under hypoxic and high temperature conditions indicates that a combination of these factors enables sperm cells to survive during the ovulation cycles. Our findings suggested a novel physiological role for lactic acid in promoting sperm quiescence in SSTs and opened up a new opportunity for technological improvement in prolonging sperm longevity at ambient or body temperature.
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Affiliation(s)
- Mei Matsuzaki
- Department of Applied Biological Chemistry, Faculty of Agriculture, Shizuoka University, 836 Ohya, Shizuoka, Shizuoka 422-8529, Japan.,United Graduate School of Agricultural Science, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Shusei Mizushima
- Department of Applied Biological Chemistry, Faculty of Agriculture, Shizuoka University, 836 Ohya, Shizuoka, Shizuoka 422-8529, Japan
| | - Gen Hiyama
- Department of Applied Biological Chemistry, Faculty of Agriculture, Shizuoka University, 836 Ohya, Shizuoka, Shizuoka 422-8529, Japan
| | - Noritaka Hirohashi
- Oki Marine Biological Station, Education and Research Center for Biological Resources, Faculty of Life and Environmental Science, Shimane University, 194 Kamo, Okinoshima-cho, Oki, Shimane 685-0024, Japan
| | - Kogiku Shiba
- Shimoda Marine Research Center, University of Tsukuba, 5-10-1 Shimoda, Shizuoka 415-0025, Japan
| | - Kazuo Inaba
- Shimoda Marine Research Center, University of Tsukuba, 5-10-1 Shimoda, Shizuoka 415-0025, Japan
| | - Tomohiro Suzuki
- Research Institute of Green Science and Technology, Shizuoka University, 836 Ohya, Shizuoka, Shizuoka 422-8529, Japan
| | - Hideo Dohra
- Research Institute of Green Science and Technology, Shizuoka University, 836 Ohya, Shizuoka, Shizuoka 422-8529, Japan
| | - Toshiyuki Ohnishi
- Department of Applied Biological Chemistry, Faculty of Agriculture, Shizuoka University, 836 Ohya, Shizuoka, Shizuoka 422-8529, Japan.,Research Institute of Green Science and Technology, Shizuoka University, 836 Ohya, Shizuoka, Shizuoka 422-8529, Japan
| | - Yoshikatsu Sato
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
| | - Tetsuya Kohsaka
- Department of Applied Biological Chemistry, Faculty of Agriculture, Shizuoka University, 836 Ohya, Shizuoka, Shizuoka 422-8529, Japan
| | - Yoshinobu Ichikawa
- Department of Applied Biological Chemistry, Faculty of Agriculture, Shizuoka University, 836 Ohya, Shizuoka, Shizuoka 422-8529, Japan
| | - Yusuke Atsumi
- Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
| | - Takashi Yoshimura
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan.,Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
| | - Tomohiro Sasanami
- Department of Applied Biological Chemistry, Faculty of Agriculture, Shizuoka University, 836 Ohya, Shizuoka, Shizuoka 422-8529, Japan
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22
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Maranesi M, Zerani M, Leonardi L, Pistilli A, Arruda-Alencar J, Stabile AM, Rende M, Castellini C, Petrucci L, Parillo F, Moura A, Boiti C. Gene Expression and Localization of NGF and Its Cognate Receptors NTRK1 and NGFR in the Sex Organs of Male Rabbits. Reprod Domest Anim 2015; 50:918-25. [DOI: 10.1111/rda.12609] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Accepted: 08/17/2015] [Indexed: 12/22/2022]
Affiliation(s)
- M Maranesi
- Dipartimento di Medicina Veterinaria; Università degli Studi di Perugia; Perugia Italy
| | - M Zerani
- Scuola di Bioscienze e Medicina Veterinaria; Università degli Studi di Camerino; Matelica Italy
| | - L Leonardi
- Dipartimento di Medicina Veterinaria; Università degli Studi di Perugia; Perugia Italy
| | - A Pistilli
- Dipartimento di Scienze Chirurgiche e Biomediche; Sezione di Anatomia Umana; Clinica e Forense; Università degli Studi di Perugia; Perugia Italy
| | - J Arruda-Alencar
- Department of Animal Science; Federal University of Ceará; Fortaleza CE Brazil
| | - AM Stabile
- Dipartimento di Scienze Chirurgiche e Biomediche; Sezione di Anatomia Umana; Clinica e Forense; Università degli Studi di Perugia; Perugia Italy
| | - M Rende
- Dipartimento di Scienze Chirurgiche e Biomediche; Sezione di Anatomia Umana; Clinica e Forense; Università degli Studi di Perugia; Perugia Italy
| | - C Castellini
- Dipartimento di Scienze Agrarie; Alimentari e Ambientali; Università degli Studi di Perugia; Perugia Italy
| | - L Petrucci
- Scuola di Bioscienze e Medicina Veterinaria; Università degli Studi di Camerino; Matelica Italy
| | - F Parillo
- Scuola di Bioscienze e Medicina Veterinaria; Università degli Studi di Camerino; Matelica Italy
| | - A Moura
- Department of Animal Science; Federal University of Ceará; Fortaleza CE Brazil
| | - C Boiti
- Dipartimento di Medicina Veterinaria; Università degli Studi di Perugia; Perugia Italy
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23
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Induction of ovulation in rabbits by adding Lecirelin to the seminal dose: in vitro and in vivo effects of different excipients. Anim Reprod Sci 2014; 150:44-9. [PMID: 25242368 DOI: 10.1016/j.anireprosci.2014.08.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Revised: 07/22/2014] [Accepted: 08/20/2014] [Indexed: 11/24/2022]
Abstract
This study evaluates the effect of Lecirelin (Dalmarelin(®), Fatro, Italy) diluted in different excipients (benzilic alcohol, benzoic acid and paraben) added to a seminal dose on LH concentrations, progesterone concentrations and ovarian status in rabbits. The in vitro effect on spermatozoa was also tested. A total of 100 multiparous female rabbits were divided into 5 groups, which at the moment of AI, received 0.2 mL (5 μg/dose) intramuscular (im) inoculation of Lecirelin (control) or the same Lecirelin dose administered intravaginally (iv) with the seminal dose alone (Lecirelin group) or with benzilic alcohol (Lecirelin BA group), benzoic acid (Lecirelin BAc group) or parabens (Lecirelin PA group) as an excipient. After 7 days, 10 rabbits per group were euthanized to analyze their ovarian status. In the control group, a high LH peak was detected 30 min post AI, while in the iv groups a slight increase in LH occurred after 120 min. The ovulation and fertility rate was similar in control and Lecirelin groups, while the lowest fertility rate was detected in the Lecirelin BA group. In a second experiment, the semen samples collected from male rabbits were diluted in TALP (control) or mixed with the 5 μg of Lecirelin solutions used in the first experiment. The highest percentage of capacitated sperm (68.3%) was recorded in the Lecirelin PA. The lowest percentages were observed in the Lecirelin BA and BAc groups. In conclusion, the iv administration of Lecirelin represents an alternative method for simplifying rabbit insemination procedures.
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24
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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] [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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25
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Anaya-Hernández A, Méndez-Tepepa M, Laura G. HA, Pacheco P, Martínez-Gómez M, Castelán F, Cuevas E. Farnesoid X receptor immunolocalization in reproductive tissues of adult female rabbits. Acta Histochem 2014; 116:1068-74. [PMID: 24975630 DOI: 10.1016/j.acthis.2014.05.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Revised: 05/02/2014] [Accepted: 05/04/2014] [Indexed: 12/21/2022]
Abstract
Farnesoid X receptor (FXR) has been involved in lipid metabolism, cell proliferation, apoptosis, and aromatase expression, as well as in the steroid synthesis and signaling. Considering that these events occur in reproductive tissues in females, the aim of the present study was to determine the immunolocalization of FXR in the ovary, oviduct, uterus, and vagina of rabbits. Rabbits were sacrificed and their reproductive tissues were excised and histologically processed. Immunohistochemistry for FXR was done and reproductive tissues were photographed. FXR immunoreactivity was found in all types of ovarian follicles, ovarian stroma, and corpus luteum of virgin and pregnant rabbits. Also, oviductal and vaginal epithelium of virgins, as well as the oviductal smooth muscle, showed anti-FXR immunoreactivity. The uterine epithelium and musculature of virgins had scarce anti-FXR immunoreactivity. Although the role of FXR in female reproductive tissues is still not known, it is possible to consider various functions related to the reproductive tissue.
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26
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Aminopeptidase activity in seminal plasma and effect of dilution rate on rabbit reproductive performance after insemination with an extender supplemented with buserelin acetate. Theriogenology 2014; 81:1223-8. [DOI: 10.1016/j.theriogenology.2014.02.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Revised: 02/06/2014] [Accepted: 02/10/2014] [Indexed: 11/17/2022]
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27
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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] [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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28
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Pedrero-Badillo F, Anaya-Hernández A, Corona-Quintanilla DL, Castelán F, Pacheco P, Martínez-Gómez M, Cuevas E. Morphohistological characteristics of rabbit oviduct: A proposal for a single regionalization. Anim Reprod Sci 2013; 143:102-11. [DOI: 10.1016/j.anireprosci.2013.09.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Revised: 08/28/2013] [Accepted: 09/19/2013] [Indexed: 10/26/2022]
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