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Feugang JM, Gad A, Menjivar NG, Ishak GM, Gebremedhn S, Gastal MO, Dlamini NH, Prochazka R, Gastal EL, Tesfaye D. Seasonal influence on miRNA expression dynamics of extracellular vesicles in equine follicular fluid. J Anim Sci Biotechnol 2024; 15:137. [PMID: 39380110 DOI: 10.1186/s40104-024-01097-2] [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: 04/30/2024] [Accepted: 08/27/2024] [Indexed: 10/10/2024] Open
Abstract
BACKGROUND Ovarian follicular fluid (FF) is a dynamic environment that changes with the seasons, affecting follicle development, ovulation, and oocyte quality. Cells in the follicles release tiny particles called extracellular vesicles (EVs) containing vital regulatory molecules, such as microRNAs (miRNAs). These miRNAs are pivotal in facilitating communication within the follicles through diverse signaling and information transfer forms. EV-coupled miRNA signaling is implicated to be associated with ovarian function, follicle and oocyte growth and response to various environmental insults. Herein, we investigated how seasonal variations directly influence the ovulatory and anovulatory states of ovarian follicles and how are they associated with follicular fluid EV-coupled miRNA dynamics in horses. RESULTS Ultrasonographic monitoring and follicular fluid aspiration of preovulatory follicles in horses during the anovulatory (spring: non-breeding) and ovulatory (spring, summer, and fall: breeding) seasons and subsequent EV isolation and miRNA profiling identified significant variation in EV-miRNA cargo content. We identified 97 miRNAs with differential expression among the groups and specific clusters of miRNAs involved in the spring transition (miR-149, -200b, -206, -221, -328, and -615) and peak breeding period (including miR-143, -192, -451, -302b, -100, and let-7c). Bioinformatic analyses showed enrichments in various biological functions, e.g., transcription factor activity, transcription and transcription regulation, nucleic acid binding, sequence-specific DNA binding, p53 signaling, and post-translational modifications. Cluster analyses revealed distinct sets of significantly up- and down-regulated miRNAs associated with spring anovulatory (Cluster 1) and summer ovulation-the peak breeding season (Clusters 4 and 6). CONCLUSIONS The findings from the current study shed light on the dynamics of FF-EV-coupled miRNAs in relation to equine ovulatory and anovulatory seasons, and their roles in understanding the mechanisms involved in seasonal shifts and ovulation during the breeding season warrant further investigation.
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Affiliation(s)
- Jean M Feugang
- Department of Animal and Dairy Sciences, Mississippi State University, Mississippi State, MS, 39762, USA.
| | - Ahmed Gad
- Animal Reproduction and Biotechnology Laboratory (ARBL), Department of Biomedical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, 80523, USA
- Department of Animal Production, Faculty of Agriculture, Cairo University, Giza, 12613, Egypt
| | - Nico G Menjivar
- Animal Reproduction and Biotechnology Laboratory (ARBL), Department of Biomedical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, 80523, USA
| | - Ghassan M Ishak
- Department of Surgery and Obstetrics, College of Veterinary Medicine, University of Baghdad, Baghdad, 10011, Iraq
- Animal Science, School of Agricultural Sciences, Southern Illinois University, Carbondale, IL, 62901, USA
| | | | - Melba O Gastal
- Animal Science, School of Agricultural Sciences, Southern Illinois University, Carbondale, IL, 62901, USA
| | - Notsile H Dlamini
- Department of Animal and Dairy Sciences, Mississippi State University, Mississippi State, MS, 39762, USA
| | - Radek Prochazka
- Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Liběchov, 27721, Czech Republic
| | - Eduardo L Gastal
- Animal Science, School of Agricultural Sciences, Southern Illinois University, Carbondale, IL, 62901, USA
| | - Dawit Tesfaye
- Animal Reproduction and Biotechnology Laboratory (ARBL), Department of Biomedical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, 80523, USA
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Laufkötter S, Längerer L, Wehrend A. [Individual hormonal profiles of blood progesterone and estradiol-17β during the course of a reproductive cycle in mares]. Tierarztl Prax Ausg G Grosstiere Nutztiere 2024; 52:88-95. [PMID: 38701799 DOI: 10.1055/a-2276-5226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/05/2024]
Abstract
OBJECT AND AIM This study presents the individual course of estradiol-17ß and progesterone concentrations in blood during the reproductive cycle in mares in order to point out physiological differences between individual animals and to aid in the interpretation of hormone values. MATERIAL AND METHODS Concentrations of estradiol-17ß and progesterone were determined in seven mares over the course of their cycle. One mare was excluded from the study due to a physiologically deviating cycle. In addition, the mares' ovaries were examined via ultrasound on a daily basis in order to match the hormone values to morphological changes of the ovaries. RESULTS In some cases, the mares showed considerable individual differences in their hormone concentrations, which also differed from the published comparative values in the literature. For example, two mares showed progesterone levels above basal levels at the time of ovulation. The postovulatory progesterone concentrations of the mares are characterized by marked fluctuations, which makes it difficult to provide reference values in the different sections of the corpus luteum phase. The length of the plateau phases averaged 12.3±1.5 days. The mare with double ovulation showed the highest progesterone concentrations. CONCLUSION The measurement of plasma progesterone levels in mares should be interpreted only in the context of other test results. The very wide variation in estradiol-17ß concentrations makes it questionable whether the determination of this hormone value is of diagnostic value. CLINICAL RELEVANCE When interpreting steroid hormone values in the ingravid cycle of a mare, the individual concentration courses must be taken into consideration, as they may deviate significantly from the published reference values.
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Affiliation(s)
- Sara Laufkötter
- Tierklinik für Reproduktionsmedizin und Neugeborenenkunde, Justus-Liebig-Universität, Gießen
| | - Lina Längerer
- Tierklinik für Reproduktionsmedizin und Neugeborenenkunde, Justus-Liebig-Universität, Gießen
| | - Axel Wehrend
- Tierklinik für Reproduktionsmedizin und Neugeborenenkunde, Justus-Liebig-Universität, Gießen
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Cardona-García M, Jiménez-Escobar C, Ferrer MS, Maldonado-Estrada JG. Follicular Dynamics and Pregnancy Rates during Foal Heat in Colombian Paso Fino Mares Bred under Permanent Grazing. Animals (Basel) 2024; 14:760. [PMID: 38473144 DOI: 10.3390/ani14050760] [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: 12/28/2023] [Revised: 01/19/2024] [Accepted: 01/24/2024] [Indexed: 03/14/2024] Open
Abstract
No studies have evaluated the peripartum follicular dynamics resulting in foal heat under tropical environments. We aimed to assess retrospectively the peripartum follicular dynamics in Colombian Paso Fino mares that were inseminated at the foal heat, becoming pregnant or not. Records including follicular dynamics of pregnant mares prepartum and from foaling until foal heat ovulation were assessed in Colombian Paso Fino mares (CPF, n = 24) bred under permanent grazing in a tropical herd in Colombia. The number of ovarian follicles >10 mm before foaling and the largest follicle (F1) growth rate (mm/day) from foaling until the F1 reached the largest diameter (pre-ovulatory size) at the foal heat were assessed. Mares were inseminated at foal heat with 20 mL of semen (at least 500 million live spermatozoa) with >75% motility and 80% viability from a stallion of proven fertility. Ovulation was confirmed the day after follicles had reached the largest diameter. Quantitative data from follicular growth, the day at ovulation, from mares that became pregnant (PM) or not (NPM) at 16 days post-insemination were compared by one-way ANOVA, repeated measures ANOVA (follicle growth rate data) or Chi-square test (edema and cytology scores data). Epidemiological data, gestation length, and the number of follicles on third prepartum days did not significantly differ between PM and NPM (p > 0.05). Seventy-one percent of mares (17/24) got pregnant. Ovulatory follicles grew faster in the NPM group (n = 7), which ovulated between the seventh and ninth postpartum days, compared to PM (n = 17), which ovulated between the 11th and 13th postpartum days. Pre-ovulatory follicle diameter in PM (48.57 ± 0.8 mm) was significantly larger than in NPM (42.99 ± 1.0 mm) (p < 0.05). In addition, the PM edema score (2.93 ± 0.32 mm) on ovulation day was significantly lower (p < 0.05) than NPM (4.47 ± 0.05 mm). First postpartum ovulation occurred at 12.6 ± 0.3 and 8.5 ± 0.4 days (p < 0.05) in PM and NPM, respectively. Colombian Paso Fino mares bred under permanent grazing under tropical rainforest conditions with no foaling or postpartum complications showed a 71% gestation rate when inseminated at foal heat when ovulation occurs between the second and third postpartum week.
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Affiliation(s)
- Mauricio Cardona-García
- OHVRI-Research Group, Faculty of Agrarian Sciences, College of Veterinary Medicine, University of Antioquia, Medellín 050034, Colombia
| | - Claudia Jiménez-Escobar
- Grupo de Investigación en Reproducción Animal y Salud de Hato, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional de Colombia, Bogotá 111321, Colombia
| | - María S Ferrer
- College of Veterinary Medicine, The University of Georgia, Athens, GA 30602, USA
| | - Juan G Maldonado-Estrada
- OHVRI-Research Group, Faculty of Agrarian Sciences, College of Veterinary Medicine, University of Antioquia, Medellín 050034, Colombia
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Coelho LA, Silva LA, Reway AP, Buonfiglio DDC, Andrade-Silva J, Gomes PRL, Cipolla-Neto J. Seasonal Variation of Melatonin Concentration and mRNA Expression of Melatonin-Related Genes in Developing Ovarian Follicles of Mares Kept under Natural Photoperiods in the Southern Hemisphere. Animals (Basel) 2023; 13:ani13061063. [PMID: 36978604 PMCID: PMC10044279 DOI: 10.3390/ani13061063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 03/01/2023] [Accepted: 03/11/2023] [Indexed: 03/17/2023] Open
Abstract
This study investigated the seasonal variations in mRNA expression of FSH (Fshr), LH (Lhr) receptors, melatonin (Mt1 and Mt2) receptors, melatonin-synthetizing enzymes (Asmt and Aanat) and melatonin concentration in developing follicles from mares raised in natural photoperiods. For one year, ultrasonographic follicular aspiration procedures were performed monthly, and small (<20 mm), medium (20 to 35 mm) and large (>35 mm) follicles were recovered from five mares. One day before monthly sample collections, an exploratory ultrasonography conducted to record the number and the size of all follicles larger than 15 mm. The total number of large follicles were higher during the spring/summer (8.2 ± 1.9) than during autumn/winter (3.0 ± 0.5). Compared to autumn/winter seasons, there was an increase of Fshr and Aanat mRNA expressions in small, medium and large follicles, an increase of Lhr and Asmt mRNA expressions in medium and large follicles and an increase of Mt1 and Mt2 mRNA expressions in small and large follicles during spring/summer. The melatonin levels in follicular fluid were also higher during the spring/summer seasons. The present data show that melatonin locally upregulates the mRNA expression of Mt1 and Mt2 receptors and melatonin-forming enzymes in mare developing follicles during reproductive seasons.
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Affiliation(s)
- Lia Alencar Coelho
- Department of Veterinary Medicine, Faculty of Animal Science and Food Engineering (FZEA), University of São Paulo, Pirassununga 13635-900, Brazil
- Department of Physiology and Biophysics, Institute of Biomedical Sciences (ICB), University of São Paulo, São Paulo 05508-000, Brazil (J.C.-N.)
- Correspondence:
| | - Luciano Andrade Silva
- Department of Veterinary Medicine, Faculty of Animal Science and Food Engineering (FZEA), University of São Paulo, Pirassununga 13635-900, Brazil
| | - Ana Paula Reway
- Department of Veterinary Medicine, Faculty of Animal Science and Food Engineering (FZEA), University of São Paulo, Pirassununga 13635-900, Brazil
| | - Daniella Do Carmo Buonfiglio
- Department of Physiology and Biophysics, Institute of Biomedical Sciences (ICB), University of São Paulo, São Paulo 05508-000, Brazil (J.C.-N.)
- Department of Pharmacology, Toxicology and Neuroscience Institute, Morehouse School of Medicine, Atlanta, GA 30310, USA
| | - Jéssica Andrade-Silva
- Department of Physiology and Biophysics, Institute of Biomedical Sciences (ICB), University of São Paulo, São Paulo 05508-000, Brazil (J.C.-N.)
| | - Patrícia Rodrigues Lourenço Gomes
- Department of Physiology and Biophysics, Institute of Biomedical Sciences (ICB), University of São Paulo, São Paulo 05508-000, Brazil (J.C.-N.)
| | - José Cipolla-Neto
- Department of Physiology and Biophysics, Institute of Biomedical Sciences (ICB), University of São Paulo, São Paulo 05508-000, Brazil (J.C.-N.)
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Ginther OJ. Follicle Selection in Mares as a Model for Illustrating the Many Hormonal and Biochemical Interactions That Drive a Single Physiological Mechanism. J Equine Vet Sci 2023; 121:104196. [PMID: 36566910 DOI: 10.1016/j.jevs.2022.104196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 12/15/2022] [Accepted: 12/19/2022] [Indexed: 12/24/2022]
Abstract
The mechanism for selection of the future dominant or ovulatory follicle in mares involves a relatively abrupt separation in growth rates between the future dominant follicle and several subordinate follicles and is termed diameter deviation. The event is used to illustrate that a coordinated complex of many follicular, hormonal, and biochemical factors interact and interbalance during a single physiological mechanism. For example, a positive effect of follicle stimulating hormone (FSH) on development of all follicles during the growing phase can later involve a positive effect of luteinizing hormone (LH) but apparently only on the future dominant follicle. In turn, the developing and future dominant follicle produces estradiol which at appropriate times and degrees reduces FSH concentrations to accommodate follicle functions at certain levels of FSH. Meanwhile, the estradiol prevents LH from increasing from a useful to an adverse concentration. These interactions enmesh with the production and roles of other factors (e.g., inhibin, insulin-like growth factor) during follicle selection. The wide array of morphological, hormonal, and biochemical activities occur in harmony even when in the same tissue and often at the same time.
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Lossi L. Anatomical features for an adequate choice of the experimental animal model in biomedicine: III. Ferret, goat, sheep, and horse. Ann Anat 2022; 244:151978. [PMID: 35787443 DOI: 10.1016/j.aanat.2022.151978] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 06/08/2022] [Accepted: 06/09/2022] [Indexed: 11/17/2022]
Abstract
The anatomical characteristics of each of the many species today employed in biomedical research are very important when selecting the correct animal model(s), especially for conducting translational research. In previous papers, these features have been considered for fish (D'Angelo et al. Ann. Anat, 2016, 205:75), the most common laboratory rodents, rabbits, and pigs (Lossi et al. 2016). I here follow this line of discussion by dealing with the importance of proper knowledge of ferrets, goats, sheep, and horses' main anatomical features in translational research.
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Affiliation(s)
- Laura Lossi
- University of Turin, Department of Veterinary Sciences, Turin, Italy; INN, Istituto Nazionale di Neuroscienze, Turin, Italy.
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7
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Benammar A, Derisoud E, Vialard F, Palmer E, Ayoubi JM, Poulain M, Chavatte-Palmer P. The Mare: A Pertinent Model for Human Assisted Reproductive Technologies? Animals (Basel) 2021; 11:2304. [PMID: 34438761 PMCID: PMC8388489 DOI: 10.3390/ani11082304] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Revised: 07/28/2021] [Accepted: 08/01/2021] [Indexed: 12/12/2022] Open
Abstract
Although there are large differences between horses and humans for reproductive anatomy, follicular dynamics, mono-ovulation, and embryo development kinetics until the blastocyst stage are similar. In contrast to humans, however, horses are seasonal animals and do not have a menstrual cycle. Moreover, horse implantation takes place 30 days later than in humans. In terms of artificial reproduction techniques (ART), oocytes are generally matured in vitro in horses because ovarian stimulation remains inefficient. This allows the collection of oocytes without hormonal treatments. In humans, in vivo matured oocytes are collected after ovarian stimulation. Subsequently, only intra-cytoplasmic sperm injection (ICSI) is performed in horses to produce embryos, whereas both in vitro fertilization and ICSI are applied in humans. Embryos are transferred only as blastocysts in horses. In contrast, four cells to blastocyst stage embryos are transferred in humans. Embryo and oocyte cryopreservation has been mastered in humans, but not completely in horses. Finally, both species share infertility concerns due to ageing and obesity. Thus, reciprocal knowledge could be gained through the comparative study of ART and infertility treatments both in woman and mare, even though the horse could not be used as a single model for human ART.
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Affiliation(s)
- Achraf Benammar
- Université Paris-Saclay, UVSQ, INRAE, BREED, 78350 Jouy-en-Josas, France; (A.B.); (E.D.); (F.V.); (J.M.A.); (M.P.)
- Ecole Nationale Vétérinaire d’Alfort, BREED, 94700 Maisons-Alfort, France
- Department of Gynaecology and Obstetrics, Foch Hospital, 92150 Suresnes, France
| | - Emilie Derisoud
- Université Paris-Saclay, UVSQ, INRAE, BREED, 78350 Jouy-en-Josas, France; (A.B.); (E.D.); (F.V.); (J.M.A.); (M.P.)
- Ecole Nationale Vétérinaire d’Alfort, BREED, 94700 Maisons-Alfort, France
| | - François Vialard
- Université Paris-Saclay, UVSQ, INRAE, BREED, 78350 Jouy-en-Josas, France; (A.B.); (E.D.); (F.V.); (J.M.A.); (M.P.)
- Ecole Nationale Vétérinaire d’Alfort, BREED, 94700 Maisons-Alfort, France
| | - Eric Palmer
- Académie d’Agriculture de France, 75007 Paris, France;
| | - Jean Marc Ayoubi
- Université Paris-Saclay, UVSQ, INRAE, BREED, 78350 Jouy-en-Josas, France; (A.B.); (E.D.); (F.V.); (J.M.A.); (M.P.)
- Ecole Nationale Vétérinaire d’Alfort, BREED, 94700 Maisons-Alfort, France
- Department of Gynaecology and Obstetrics, Foch Hospital, 92150 Suresnes, France
| | - Marine Poulain
- Université Paris-Saclay, UVSQ, INRAE, BREED, 78350 Jouy-en-Josas, France; (A.B.); (E.D.); (F.V.); (J.M.A.); (M.P.)
- Ecole Nationale Vétérinaire d’Alfort, BREED, 94700 Maisons-Alfort, France
- Department of Gynaecology and Obstetrics, Foch Hospital, 92150 Suresnes, France
| | - Pascale Chavatte-Palmer
- Université Paris-Saclay, UVSQ, INRAE, BREED, 78350 Jouy-en-Josas, France; (A.B.); (E.D.); (F.V.); (J.M.A.); (M.P.)
- Ecole Nationale Vétérinaire d’Alfort, BREED, 94700 Maisons-Alfort, France
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Kaps M, Okada CTC, Gautier CM, Aurich J, Aurich C. Deslorelin Slow-Release Implants Delay Ovulation and Increase Plasma AMH Concentration and Small Antral Follicles in Haflinger Mares. Animals (Basel) 2021; 11:ani11061600. [PMID: 34071625 PMCID: PMC8229780 DOI: 10.3390/ani11061600] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 05/22/2021] [Accepted: 05/26/2021] [Indexed: 11/21/2022] Open
Abstract
Simple Summary In horses, oocyte collection followed by intra-cytoplasmatic sperm injection is increasingly used. The yield of oocytes is a limiting factor and depends on the number of follicles present on the ovary during oocyte collection. Therefore, the aim of this study was to analyze the effect of slow-release implants containing the GnRH analogue deslorelin on the number of follicles and on hormones regulating follicular development. Six mares received a deslorelin implant and six mares served as controls. The interval to the first spontaneous ovulation was prolonged in treated mares. The treatment changed the release pattern of the gonadotrophins LH and FSH. Changes in the number of follicles 10 to 15 mm in diameter were detected in deslorelin-treated mares. These changes were also reflected by increasing plasma anti-Muellerian hormone concentrations, a hormone produced by growing follicles. In conclusion, deslorelin implants induce changes in ovarian follicle subpopulations and could be a promising tool for the preparation of mares for assisted reproductive procedures. Abstract There is an increasing interest in the manipulation of ovarian follicular populations in large domestic animals because this could prove beneficial for assisted reproductive techniques such as ovum pick-up (OPU). The aim of the present study was to evaluate the effects of deslorelin slow-release implants (SRI) on the interovulatory interval, antral follicle count (AFC), number of follicles of different size ranges and plasma anti-Muellerian hormone (AMH) concentration in mares. To synchronize their estrous cycles, Haflinger mares (n = 12) were treated twice with a PGF2α analogue. One day after the second injection (day 0), mares received a 9.4 mg deslorelin SRI (group DES, n = 6) or 1.25 mg deslorelin in a short-acting formulation (CON; n = 6), respectively. Regular transrectal ultrasonography of the genital tract was performed and blood samples were collected for the analysis of progesterone, AMH and gonadotrophins. The interval from implant insertion to the first spontaneous ovulation was 23.8 ± 10.5 days in group DES compared to 17.0 ± 3.9 days in group CON (p < 0.05). For the concentrations of LH, FSH and AMH, interactions between time and treatment were detected (p < 0.05). The AFC and the mean number of follicles with 5 to 10, 10 to 15 and 15 to 20 mm in diameter changed over time (p < 0.05). A time x treatment interaction was demonstrated for follicles of 10 to 15 mm in diameter (p < 0.05). The changes in this follicular subpopulation were reflected by increased plasma AMH concentration in group DES. In conclusion, 9.4 mg deslorelin implants show minor effects with regard to estrus suppression in mares, whereas the changes in the subpopulation of small ovarian follicles could be a promising tool for preparation of mares for OPU.
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Affiliation(s)
- Martim Kaps
- Artificial Insemination and Embryo Transfer, Department for Small Animals and Horses, Vetmeduni Vienna, Veterinärplatz 1, 1210 Vienna, Austria; (M.K.); (C.T.C.O.); (C.M.G.)
| | - Carolina T. C. Okada
- Artificial Insemination and Embryo Transfer, Department for Small Animals and Horses, Vetmeduni Vienna, Veterinärplatz 1, 1210 Vienna, Austria; (M.K.); (C.T.C.O.); (C.M.G.)
| | - Camille M. Gautier
- Artificial Insemination and Embryo Transfer, Department for Small Animals and Horses, Vetmeduni Vienna, Veterinärplatz 1, 1210 Vienna, Austria; (M.K.); (C.T.C.O.); (C.M.G.)
| | - Jörg Aurich
- Obstetrics, Gynaecology and Andrology, Department for Small Animals and Horses, Vetmeduni Vienna, Veterinärplatz 1, 1210 Vienna, Austria;
| | - Christine Aurich
- Artificial Insemination and Embryo Transfer, Department for Small Animals and Horses, Vetmeduni Vienna, Veterinärplatz 1, 1210 Vienna, Austria; (M.K.); (C.T.C.O.); (C.M.G.)
- Correspondence: ; Tel.: +43-1-25077-6400
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9
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Wang Q, Ma X, Zhang C. Effects of thyroid hormone on ovarian cell apoptosis in the rat. Reprod Fertil Dev 2020; 32:1060-1066. [PMID: 32758353 DOI: 10.1071/rd20110] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Accepted: 06/18/2020] [Indexed: 12/14/2022] Open
Abstract
Follicle development is a complicated process regulated by thyroid hormone (TH). TH dysregulation is associated with reproductive disorders; however, the mechanism underlying these relationships remains unclear. Glucose-related protein 78 (GRP78) is a well-characterised endoplasmic reticulum stress protein related to ovarian cell apoptosis. To clarify whether GRP78 is regulated by TH and the involvement of GRP78 in follicle development, we established rat models of hypothyroidism and hyperthyroidism and investigated the effects of TH dysregulation on levels of GRP78, C/EBP homologous protein (CHOP) and cleaved caspase-3. TH dysregulation decreased levels of GRP78 and increased those of CHOP and cleaved caspase-3 in both rat models. However, treatment with equine chorionic gonadotrophin reversed these effects, as well as granulosa cell apoptosis induced by TH dysregulation. Together, these results provide evidence that TH dysregulation alters the GRP78 expression profile, triggering the apoptotic signalling pathway, and suggest that GRP78 is a novel mediator of TH in follicle development.
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Affiliation(s)
- Qiaozhi Wang
- College of Life Science, Capital Normal University, Beijing 100048, P.R. China
| | - Xiaoshu Ma
- College of Life Science, Capital Normal University, Beijing 100048, P.R. China
| | - Cheng Zhang
- College of Life Science, Capital Normal University, Beijing 100048, P.R. China; and Corresponding author.
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Ferreira L, Wischral A, Bartolomeu C, Costa L, Soares A. Influência da somatotropina recombinante bovina no desenvolvimento folicular e na coleta de embriões em éguas. ARQ BRAS MED VET ZOO 2020. [DOI: 10.1590/1678-4162-10604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
RESUMO Dez éguas, sem raça definida, foram submetidas a avaliações ultrassonográficas durante o intervalo interovulatório, avaliando-se folículos ≥ 5mm. Cinco éguas foram tratadas com 500mg de r-bST no primeiro e no 14º dia pós-ovulação (grupo GT), e as demais com soro fisiológico (grupo GC). Quando o folículo dominante atingiu diâmetro ≥ 40mm, foram induzidas com hCG e inseminadas 24 horas após, sendo submetidas à coleta de embrião seis dias após a ovulação. Os dados foram agrupados de acordo com o diâmetro do folículo dominante nas fases de emergência, divergência, dominância, pré-ovulatória, indução, inseminação e ovulação. Todas as éguas foram usadas duas vezes, no mesmo grupo. O GT apresentou crescimento folicular precoce para as fases de emergência, divergência, dominância e pré-ovulatória, assim como para o seu maior folículo subordinado, que cresceu mais cedo. As taxas de recuperação foram de 90% (GC) e 70% (GT), em 16 estruturas coletadas, obtendo-se uma não fecundada e um blastocisto inicial para o grupo GC; os demais, no estágio de mórula, apresentaram comportamento semelhante entre os grupos. Conclui-se que a r-bST influencia a dinâmica folicular de éguas, levando a uma antecipação do desenvolvimento folicular, que pode ser utilizada para encurtar o ciclo estral.
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Affiliation(s)
- L.E.P.A. Ferreira
- Universidade Federal Rural de Pernambuco, Brazil; Instituto Federal de Educação ˗ Ciência e tecnologia de Pernambuco, Brazil
| | - A. Wischral
- Universidade Federal Rural de Pernambuco, Brazil; Universidade Federal Rural de Pernambuco, Brazil
| | - C.C. Bartolomeu
- Universidade Federal Rural de Pernambuco, Brazil; Universidade Federal Rural de Pernambuco, Brazil
| | | | - A.F. Soares
- Universidade Federal Rural de Pernambuco, Brazil; Universidade Federal Rural de Pernambuco, Brazil
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Liu J, Han Y, Tian Y, Weng X, Hu X, Liu W, Heng D, Xu K, Yang Y, Zhang C. Regulation by 3,5,3'-tri-iodothyronine and FSH of cytochrome P450 family 19 (CYP19) expression in mouse granulosa cells. Reprod Fertil Dev 2019; 30:1225-1233. [PMID: 29628021 DOI: 10.1071/rd17362] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2017] [Accepted: 02/26/2018] [Indexed: 12/17/2022] Open
Abstract
Cytochrome P450 family 19 (CYP19) plays an important role in follicular development, which is regulated by FSH. Although 3,5,3'-tri-iodothyronine (T3) combines with FSH to induce preantral follicle growth and granulosa cell development, the mechanism involved remains unclear. The aim of the present study was to determine the cellular and molecular mechanisms by which thyroid hormone (TH) and FSH regulate CYP19 expression and sterol biosynthesis during preantral follicle growth. Mice were injected subcutaneously (s.c.) with eCG (Equine chorionic gonadotropin). The results showed that eCG increased CYP19 expression in ovarian cells. CYP19 expression in granulosa cells was increased after FSH treatment, and this response was enhanced by T3. Knockdown of CYP19 significantly decreased granulosa cell viability and hormone-stimulated proliferation. In addition, CYP19 knockdown also blocked T3- and FSH-induced oestradiol (E2) synthesis in granulosa cells. Furthermore, activation of the phosphatidylinositol 3-kinase (PI3K)/Akt pathway was required for T3 and FSH regulation of CYP19 expression. In conclusion, the results of the present study indicate that CYP19 is important for T3- and FSH-induced granulosa cell development in the early stages. CYP19 could be a downstream effector of the PI3K/Akt pathway in regulating TH and FSH during follicular development and sterol biosynthesis. The findings suggest that CYP19 is a novel mediator of T3- and FSH-induced follicular development.
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Affiliation(s)
- Juan Liu
- College of Life Science, Capital Normal University, Beijing 100048, P.R. China
| | - Yingying Han
- College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing 100083, P.R. China
| | - Ye Tian
- College of Life Science, Capital Normal University, Beijing 100048, P.R. China
| | - Xuechun Weng
- College of Life Science, Capital Normal University, Beijing 100048, P.R. China
| | - Xusong Hu
- College of Life Science, Capital Normal University, Beijing 100048, P.R. China
| | - Wenbo Liu
- College of Life Science, Capital Normal University, Beijing 100048, P.R. China
| | - Dai Heng
- College of Life Science, Capital Normal University, Beijing 100048, P.R. China
| | - Kaili Xu
- College of Life Science, Capital Normal University, Beijing 100048, P.R. China
| | - Yanzhou Yang
- Key Laboratory of Fertility Preservation and Maintenance, Ministry of Education, Key Laboratory of Reproduction and Genetics in Ningxia, Department of Histology and Embryology, Ningxia Medical University, Ningxia 750004, P.R. China
| | - Cheng Zhang
- College of Life Science, Capital Normal University, Beijing 100048, P.R. China
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12
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Franciosi F, Goudet G, Tessaro I, Papillier P, Dalbies-Tran R, Reigner F, Deleuze S, Douet C, Miclea I, Lodde V, Luciano AM. In vitro maturation affects chromosome segregation, spindle morphology and acetylation of lysine 16 on histone H4 in horse oocytes. Reprod Fertil Dev 2018; 29:721-730. [PMID: 26651296 DOI: 10.1071/rd15350] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Accepted: 11/12/2015] [Indexed: 12/14/2022] Open
Abstract
Implantation failure and genetic developmental disabilities in mammals are caused by errors in chromosome segregation originating mainly in the oocyte during meiosis I. Some conditions, like maternal ageing or in vitro maturation (IVM), increase the incidence of oocyte aneuploidy. Here oocytes from adult mares were used to investigate oocyte maturation in a monovulatory species. Experiments were conducted to compare: (1) the incidence of aneuploidy, (2) the morphology of the spindle, (3) the acetylation of lysine 16 on histone H4 (H4K16) and (4) the relative amount of histone acetyltransferase 1 (HAT1), K(lysine) acetyltransferase 8 (KAT8, also known as MYST1), histone deacetylase 1 (HDAC1) and NAD-dependent protein deacetylase sirtuin 1 (SIRT1) mRNA in metaphase II stage oocytes that were in vitro matured or collected from peri-ovulatory follicles. The frequency of aneuploidy and anomalies in spindle morphology was increased following IVM, along with a decrease in H4K16 acetylation that was in agreement with our previous observations. However, differences in the amount of the transcripts investigated were not detected. These results suggest that the degradation of transcripts encoding for histone deacetylases and acetyltransferases is not involved in the changes of H4K16 acetylation observed following IVM, while translational or post-translational mechanisms might have a role. Our study also suggests that epigenetic instabilities introduced by IVM may affect the oocyte and embryo genetic stability.
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Affiliation(s)
- Federica Franciosi
- Reproductive and Developmental Biology Laboratory, Department of Health, Animal Science and Food Safety, University of Milan, via Celoria, 10, Milan, 20133, Italy
| | - Ghylene Goudet
- INRA, UMR85 Physiologie de la Reproduction et des Comportements, Nouzilly, F-37380, France
| | - Irene Tessaro
- Reproductive and Developmental Biology Laboratory, Department of Health, Animal Science and Food Safety, University of Milan, via Celoria, 10, Milan, 20133, Italy
| | - Pascal Papillier
- INRA, UMR85 Physiologie de la Reproduction et des Comportements, Nouzilly, F-37380, France
| | - Rozenn Dalbies-Tran
- INRA, UMR85 Physiologie de la Reproduction et des Comportements, Nouzilly, F-37380, France
| | | | - Stefan Deleuze
- Université de Liège, Clinique des Animaux de Compagnie et des Équidés, Place du 20 Août 7, Liège, 4000, Belgium
| | - Cecile Douet
- INRA, UMR85 Physiologie de la Reproduction et des Comportements, Nouzilly, F-37380, France
| | - Ileana Miclea
- University of Agricultural Sciences and Veterinary Medicine, Calea M?n?tur 3-5, Cluj-Napoca 400372, Romania
| | - Valentina Lodde
- Reproductive and Developmental Biology Laboratory, Department of Health, Animal Science and Food Safety, University of Milan, via Celoria, 10, Milan, 20133, Italy
| | - Alberto M Luciano
- Reproductive and Developmental Biology Laboratory, Department of Health, Animal Science and Food Safety, University of Milan, via Celoria, 10, Milan, 20133, Italy
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Neves A, Albrecht F, Gregory R, Mattos R, Araújo E, Penteado V, Oliveira G. Follicle Deviation in Miniature Mares. J Equine Vet Sci 2018. [DOI: 10.1016/j.jevs.2018.05.172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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14
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Ovarian dynamics and estrous cycle length in the donkey (Equus asinus). Theriogenology 2017; 103:1-8. [DOI: 10.1016/j.theriogenology.2017.07.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 06/26/2017] [Accepted: 07/09/2017] [Indexed: 11/20/2022]
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15
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Medeiros M, Farinasso A, Nery I, Souza H, Vasconcelos J, Trindade K, Batista A, Manso Filho H, Carneiro G, Wischral A. Estudo da vascularização folicular e do corpo lúteo de éguas cíclicas tratadas com extrato de pituitária equina utilizando ultrassom Doppler colorido. ARQ BRAS MED VET ZOO 2017. [DOI: 10.1590/1678-4162-9350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
RESUMO Informações sobre a vascularização da parede folicular e do corpo lúteo equino, associadas à superovulação, são escassas. Com o objetivo de avaliar o efeito superovulatório do extrato de pituitária equina (EPE) no fluxo sanguíneo folicular e luteal, foram utilizadas seis éguas Puro Sangue Árabe, em dois ciclos estrais (controle e tratamento). As éguas foram monitoradas diariamente por ultrassonografia modo B, até que os folículos atingissem diâmetro de 23mm (desvio). No ciclo tratamento, as éguas receberam 8mg de EPE, uma vez ao dia, por via IM, até que dois ou mais folículos atingissem o diâmetro entre 32 e 35mm. A ovulação foi induzida com acetato de deslorelina, quando os folículos atingiram, no mínimo, 35mm. No momento do desvio folicular, da indução da ovulação e do último exame pré-ovulatório, foi utilizada a ultrassonografia modo B para medir o diâmetro dos folículos e, no oitavo dia pós-ovulação, para a área do corpo lúteo (CL). Utilizou-se também ultrassonografia com Doppler colorido para avaliar a perfusão sanguínea da parede folicular e do parênquima luteal. No ciclo controle, foi realizado o mesmo procedimento, exceto pelo uso do EPE. Os dados foram submetidos à análise de variância, com nível de significância de 5%. Não foi observado efeito do EPE sobre o número de ovulações, o diâmetro dos folículos, a vascularização da parede folicular e a concentração sérica de estrógeno. Os animais, tratados ou não, apresentaram CLs funcionais, não havendo diferença na área do parênquima ou da vascularização luteal, nem na concentração sérica de progesterona, no oitavo dia após a ovulação. Foi observado que o EPE proporcionou um maior número de folículos subordinados no momento da indução da ovulação do folículo dominante (P ≤ 0,05). Embora esses folículos não tenham chegado a ovular, concluiu-se que o EPE atuou no crescimento de folículos, que podem ser utilizados em outras biotécnicas, como a transferência de oócitos, com maior aproveitamento da reserva folicular de ovários equinos.
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Affiliation(s)
| | | | | | - H.M. Souza
- Universidade Federal Rural de Pernambuco, Brazil
| | | | | | - A.M. Batista
- Universidade Federal Rural de Pernambuco, Brazil
| | | | | | - A. Wischral
- Universidade Federal Rural de Pernambuco, Brazil
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Meyers-Brown GA, Loud MC, Hyland JC, Roser JF. Deep anestrous mares under natural photoperiod treated with recombinant equine FSH (reFSH) and LH (reLH) have fertile ovulations and become pregnant. Theriogenology 2017; 98:108-115. [DOI: 10.1016/j.theriogenology.2017.05.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Revised: 04/25/2017] [Accepted: 05/02/2017] [Indexed: 12/18/2022]
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17
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Scarlet D, Walter I, Hlavaty J, Aurich C. Expression and immunolocalisation of follicle-stimulating hormone receptors in gonads of newborn and adult female horses. Reprod Fertil Dev 2015; 28:RD14392. [PMID: 25693905 DOI: 10.1071/rd14392] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Accepted: 01/15/2015] [Indexed: 12/15/2022] Open
Abstract
In mares, FSH and its receptor (FSHR) are essential for ovarian function. The objective of the present study was to analyse FSHR gene expression at the mRNA and protein levels in ovarian tissue from newborn and adult horses. Expression of mRNA was analysed by reverse transcription polymerase chain reaction, whereas FSHR protein was visualised by immunohistochemistry (IHC), immunofluorescence labelling (IF) and western blot. FSHR mRNA was detected in ovarian follicles and luteal tissue from adult mares, as well as in the ovaries of neonates. Follicular growth up to 4mm in diameter was already present in neonates. Using IHC and IF, FSHR protein was detected in granulosa cells, cumulus cells and inconsistently in oocytes, independent of the animal's age or the stage of folliculogenesis. A lower FSHR expression was observed in theca cells in comparison to granulosa cells. FSHR was abundant in the ovarian stroma cells of neonates but not of adults. Luteal cells stained positive for FSHR independent of the stage of corpus luteum development. The presence of FSHR protein in various cell populations of the ovary was confirmed by western blot. In conclusion, FSHR is present in horse ovaries consistently from birth onwards and expression remains constant during the oestrous cycle.
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18
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Riveros JL, Schuler G, Urquieta B, Hoffmann B, Bonacic C. Ovarian follicular activity during late gestation and postpartum in guanaco (Lama guanicoe). Reprod Domest Anim 2014; 50:129-34. [PMID: 25528969 DOI: 10.1111/rda.12462] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2014] [Accepted: 11/05/2014] [Indexed: 11/28/2022]
Abstract
This study evaluated ovarian activity in late gestation and post-partum in guanacos in captivity. Follicular dynamics was monitored every second day from 40 days before and other 40 after delivery by transrectal sonography and by plasma steroids concentrations. Seven out of eight (87.5%) of gestating females presented ovarian follicular activity under progesterone levels >3 nmol/l with maximum follicular size of 8.42 ± 0.83 mm from days 23 to 1 before delivery. After delivery, all females have follicular wave development from day 0 to 38, with larger follicular size and longer follicular wave phases and interwave interval when compared with pre-partum data. During post-partum period, there was a close relationship between follicle size and estradiol-17β concentration, with r = 0.69 at the beginning of growth phase and r = 0.86 in association with the largest dominant follicle. Plasma estradiol-17β concentration varied from 11.92 to 198.55 pmol/l. Plasma estrone sulfate, free estrone and progesterone returned to baseline concentrations during peripartal period and remained basal thereafter. The results described follicular activity during late gestation and early post-partum period. These findings provide relevant information to understand physiological changes occurring during this reproductive key period in seasonal breeders with long gestation duration as New and Old World camelids.
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Affiliation(s)
- J L Riveros
- Departamento de Ciencias Animales, Facultad de Agronomía e Ingeniería Forestal, Pontificia Universidad Católica de Chile, Santiago, Chile
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19
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Guan S, Guo L, Zhang T, Zhu B, Wang X, Zhang C. Effects of gonadotropin on Fas and/or FasL expression and proliferation in rat ovary. Theriogenology 2014; 83:21-9. [PMID: 25294749 DOI: 10.1016/j.theriogenology.2014.06.026] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2013] [Revised: 06/05/2014] [Accepted: 06/10/2014] [Indexed: 01/22/2023]
Abstract
Although gonadotropin is a dominant hormone involved in promoting ovarian follicle development in females, the mechanism by which gonadotropin regulates follicular development is still unknown. To systematically evaluate the effectiveness of the gonadotropin on apoptosis and proliferation of ovarian cells in vivo, rats were injected subcutaneously with eCG and/or anti-eCG antiserum. Equine chorionic gonadotropin treatment increased ovarian cell proliferation and expression of FSH receptors (FSHR) as revealed by increased immunostaining of proliferating cell nuclear antigen and FSHR in rat ovary. These effects did not occur in a follicular stage-dependent manner. Moreover, these actions were abolished by anti-eCG antiserum. However, granulosa cells exhibited more intense Fas- and FasL-positive immunostaining during all follicular stages in the anti-eCG antiserum group. We used Western blot analysis to confirm these results; Fas and FasL protein contents in rat ovaries were decreased by eCG. Meanwhile, proliferating cell nuclear antigen and FSHR expression were upregulated by eCG. However, all these eCG-induced regulations were reversed by anti-eCG antiserum treatment. Furthermore, there were no significant differences between the anti-eCG antiserum and control groups. These results indicate that eCG promotes follicular development via downregulation of death-inducer Fas/FasL expression and promotion of ovarian cell proliferation, which is partially mediated by FSHR.
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Affiliation(s)
- Shuluan Guan
- College of Life Science, Capital Normal University, Beijing, People's Republic of China
| | - Li Guo
- School of Civil Engineering and Water Conservancy, Ningxia University, Yinchuan, Ningxia, People's Republic of China
| | - Tao Zhang
- Animal Husbandry and Veterinary Medicine, Ningxia Agricultural School, Yinchuan, Ningxia, Peoples' Republic of China
| | - Baochang Zhu
- College of Life Science, Capital Normal University, Beijing, People's Republic of China
| | - Xiaoxia Wang
- College of Life Science, Capital Normal University, Beijing, People's Republic of China
| | - Cheng Zhang
- College of Life Science, Capital Normal University, Beijing, People's Republic of China.
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20
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Sontakke SD, Mohammed BT, McNeilly AS, Donadeu FX. Characterization of microRNAs differentially expressed during bovine follicle development. Reproduction 2014; 148:271-83. [PMID: 24920665 DOI: 10.1530/rep-14-0140] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Several different miRNAs have been proposed to regulate ovarian follicle function; however, very limited information exists on the spatiotemporal patterns of miRNA expression during follicle development. The objective of this study was to identify, using microarray, miRNA profiles associated with growth and regression of dominant-size follicles in the bovine monovular ovary and to characterize their spatiotemporal distribution during development. The follicles were collected from abattoir ovaries and classified as small (4-8 mm) or large (12-17 mm); the latter were further classified as healthy or atretic based on estradiol and CYP19A1 levels. Six pools of small follicles and individual large healthy (n=6) and large atretic (n=5) follicles were analyzed using Exiqon's miRCURY LNA microRNA Array 6th gen, followed by qPCR validation. A total of 17 and 57 sequences were differentially expressed (greater than or equal to twofold; P<0.05) between large healthy and each of small and large atretic follicles respectively. Bovine miRNAs confirmed to be upregulated in large healthy follicles relative to small follicles (bta-miR-144, bta-miR-202, bta-miR-451, bta-miR-652, and bta-miR-873) were further characterized. Three of these miRNAs (bta-miR-144, bta-miR-202, and bta-miR-873) were also downregulated in large atretic follicles relative to large healthy follicles. Within the follicle, these miRNAs were predominantly expressed in mural granulosa cells. Further, body-wide screening revealed that bta-miR-202, but not other miRNAs, was expressed exclusively in the gonads. Finally, a total of 1359 predicted targets of the five miRNAs enriched in large healthy follicles were identified, which mapped to signaling pathways involved in follicular cell proliferation, steroidogenesis, prevention of premature luteinization, and oocyte maturation.
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Affiliation(s)
- Sadanand D Sontakke
- The Roslin Institute and Royal (Dick) School of Veterinary StudiesUniversity of Edinburgh, Easter Bush, Midlothian EH25 9RG, UKThe Queen's Medical Research InstituteMRC Centre for Reproductive Health, 47 Little France Crescent, Edinburgh EH16 4TJ, UK
| | - Bushra T Mohammed
- The Roslin Institute and Royal (Dick) School of Veterinary StudiesUniversity of Edinburgh, Easter Bush, Midlothian EH25 9RG, UKThe Queen's Medical Research InstituteMRC Centre for Reproductive Health, 47 Little France Crescent, Edinburgh EH16 4TJ, UK
| | - Alan S McNeilly
- The Roslin Institute and Royal (Dick) School of Veterinary StudiesUniversity of Edinburgh, Easter Bush, Midlothian EH25 9RG, UKThe Queen's Medical Research InstituteMRC Centre for Reproductive Health, 47 Little France Crescent, Edinburgh EH16 4TJ, UK
| | - F Xavier Donadeu
- The Roslin Institute and Royal (Dick) School of Veterinary StudiesUniversity of Edinburgh, Easter Bush, Midlothian EH25 9RG, UKThe Queen's Medical Research InstituteMRC Centre for Reproductive Health, 47 Little France Crescent, Edinburgh EH16 4TJ, UK
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21
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da Silveira JC, Carnevale EM, Winger QA, Bouma GJ. Regulation of ACVR1 and ID2 by cell-secreted exosomes during follicle maturation in the mare. Reprod Biol Endocrinol 2014; 12:44. [PMID: 24884710 PMCID: PMC4045866 DOI: 10.1186/1477-7827-12-44] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Accepted: 05/23/2014] [Indexed: 01/26/2023] Open
Abstract
BACKGROUND Ovarian follicle growth and maturation requires extensive communication between follicular somatic cells and oocytes. Recently, intercellular cell communication was described involving cell-secreted vesicles called exosomes (50-150 nm), which contain miRNAs and protein, and have been identified in ovarian follicular fluid. The goal of this study was to identify a possible role of exosomes in follicle maturation. METHODS Follicle contents were collected from mares at mid-estrous (~35 mm, before induction of follicular maturation) and pre-ovulatory follicles (30-34 h after induction of follicular maturation). A real time PCR screen was conducted to reveal significant differences in the presence of exosomal miRNAs isolated from mid-estrous and pre-ovulatory follicles, and according to bioinformatics analysis these exosomal miRNAs are predicted to target members belonging to the TGFB superfamily, including ACVR1 and ID2. Granulosa cells from pre-ovulatory follicles were cultured and treated with exosomes isolated from follicular fluid. Changes in mRNA and protein were measured by real time PCR and Western blot. RESULTS ACVR1 mRNA and protein was detected in granulosa cells at mid-estrous and pre-ovulatory stages, and real time PCR analysis revealed significantly lower levels of ID2 (an ACVR1 target gene) in granulosa cells from pre-ovulatory follicles. Exposure to exosomes from follicular fluid of mid-estrous follicles decreased ID2 levels in granulosa cells. Moreover, exosomes isolated from mid-estrous and pre-ovulatory follicles contain ACVR1 and miR-27b, miR-372, and miR-382 (predicted regulators of ACVR1 and ID2) were capable of altering ID2 levels in pre-ovulatory granulosa cells. CONCLUSIONS These data indicate that exosomes isolated from follicular fluid can regulate members of the TGFB/BMP signaling pathway in granulosa cells, and possibly play a role in regulating follicle maturation.
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Affiliation(s)
- Juliano C da Silveira
- Animal Reproduction and Biotechnology Laboratory, Department of Biomedical Sciences, Colorado State University, Fort Collins, CO, USA
| | - Elaine M Carnevale
- Animal Reproduction and Biotechnology Laboratory, Department of Biomedical Sciences, Colorado State University, Fort Collins, CO, USA
| | - Quinton A Winger
- Animal Reproduction and Biotechnology Laboratory, Department of Biomedical Sciences, Colorado State University, Fort Collins, CO, USA
| | - Gerrit J Bouma
- Animal Reproduction and Biotechnology Laboratory, Department of Biomedical Sciences, Colorado State University, Fort Collins, CO, USA
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22
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Schook MW, Wildt DE, Weiss RB, Wolfe BA, Archibald KE, Pukazhenthi BS. Fundamental Studies of the Reproductive Biology of the Endangered Persian Onager (Equus hemionus onager) Result in First Wild Equid Offspring from Artificial Insemination1. Biol Reprod 2013; 89:41. [DOI: 10.1095/biolreprod.113.110122] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
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23
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Schauer SN, Sontakke SD, Watson ED, Esteves CL, Donadeu FX. Involvement of miRNAs in equine follicle development. Reproduction 2013; 146:273-82. [PMID: 23813447 DOI: 10.1530/rep-13-0107] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Previous evidence from in vitro studies suggests specific roles for a subset of miRNAs, including miR-21, miR-23a, miR-145, miR-503, miR-224, miR-383, miR-378, miR-132, and miR-212, in regulating ovarian follicle development. The objective of this study was to determine changes in the levels of these miRNAs in relation to follicle selection, maturation, and ovulation in the monovular equine ovary. In Experiment 1, follicular fluid was aspirated during ovulatory cycles from the dominant (DO) and largest subordinate (S) follicles of an ovulatory wave and the dominant (DA) follicle of a mid-cycle anovulatory wave (n=6 mares). Follicular fluid levels of progesterone and estradiol were lower (P<0.01) in S follicles than in DO follicles, whereas mean levels of IGF1 were lower (P<0.01) in S and DA follicles than in DO follicles. Relative to DO and DA follicles, S follicles had higher (P≤0.01) follicular fluid levels of miR-145 and miR-378. In Experiment 2, follicular fluid and granulosa cells were aspirated from dominant follicles before (DO) and 24 h after (L) administration of an ovulatory dose of hCG (n=5 mares/group). Relative to DO follicles, L follicles had higher follicular fluid levels of progesterone (P=0.05) and lower granulosa cell levels of CYP19A1 and LHCGR (P<0.005). Levels of miR-21, miR-132, miR-212, and miR-224 were increased (P<0.05) in L follicles; this was associated with reduced expression of the putative miRNA targets, PTEN, RASA1, and SMAD4. These novel results may indicate a physiological involvement of miR-21, miR-145, miR-224, miR-378, miR-132, and miR-212 in the regulation of cell survival, steroidogenesis, and differentiation during follicle selection and ovulation in the monovular ovary.
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Affiliation(s)
- S N Schauer
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Edinburgh, Midlothian EH25 9RG, UK
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24
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25
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Mata F. Evaluation of growth models for follicle development and ovulation in Lusitano mares. Anim Reprod Sci 2012. [PMID: 23182468 DOI: 10.1016/j.anireprosci.2012.10.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Several growth models are commonly used in the biological sciences, to model the follicle growth occurring in the estrous cycle. The aim of this project was to find the model that best fit the follicular size growth data for Lusitano mares. Retrospective data collected from reproduction book records of n=84 mares and n=124 cycles was used to find the series to be fitted to the models. The exponential, Gompertz, logistic, von Bertalanffy, Richards and Weibull models were used, and the most parsimonious and best fit was achieved with the logistic model (r(2)=0.999). The logistic model fits the Lusitano mare's follicle size growth data very well and its parameters were also shown to have a credible biological interpretation.
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Affiliation(s)
- F Mata
- Hartpury College, University of the West of England, Hartpury, Gloucester, Gloucestershire, United Kingdom.
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26
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Gupta PSP, Nandi S. Isolation and culture of preantral follicles for retrieving oocytes for the embryo production: present status in domestic animals. Reprod Domest Anim 2011; 47:513-9. [PMID: 22008238 DOI: 10.1111/j.1439-0531.2011.01904.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
The development of efficient ovarian preantral follicle (PF) isolation and culture systems provide a large number of oocytes for the manipulation and embryo production. It also helps for understanding the mechanisms of follicle and oocyte development. Isolation and culture protocols for PFs were developed for many domestic species like cattle, buffalo, sheep, goat, pig, horse, camel, dog and cats; however, embryo production from oocytes derived from in vitro grown PFs was reported only in pigs, buffalo, sheep and goat. The rate of oocyte maturation from PFs grown in vitro is low and requires considerable research. This paper presents an overview of isolation and culture systems of PFs that have been developed for domestic species (cattle, buffalo, sheep, goat, pigs, horse, camel, dog and cat) along with the current status of progress achieved in the direction of producing embryos using PFs as the source of oocyte in these species.
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Affiliation(s)
- P S P Gupta
- National Institute of Animal Nutrition and Physiology, Bangalore-30, India.
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27
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Effects of timing of induced luteolysis in embryo donor mares on reproductive performance and pregnancy rate in recipient mares. Theriogenology 2011; 75:1170-4. [DOI: 10.1016/j.theriogenology.2010.12.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2010] [Revised: 12/01/2010] [Accepted: 12/02/2010] [Indexed: 11/23/2022]
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28
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Rodriguez Hurtado I, Stewart A, Wolfe D, Caldwell F, Harrie M, Whitley E. Immunolocalization of the hyaluronan receptor CD44 in the reproductive tract of the mare. Theriogenology 2011; 75:276-86. [DOI: 10.1016/j.theriogenology.2010.08.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2009] [Revised: 08/19/2010] [Accepted: 08/20/2010] [Indexed: 11/30/2022]
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29
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Meyers-Brown G, McCue P, Niswender K, Squires E, DeLuca C, Bidstrup L, Colgin M, Famula T, Roser J. Superovulation in Mares Using Recombinant Equine Follicle Stimulating Hormone: Ovulation Rates, Embryo Retrieval, and Hormone Profiles. J Equine Vet Sci 2010. [DOI: 10.1016/j.jevs.2010.09.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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