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Contreras-Solís I, Porcu C, Sotgiu FD, Chessa F, Pasciu V, Dattena M, Caredda M, Abecia JA, Molle G, Berlinguer F. Effect of Strategic Supplementation of Dietary By-Pass Linseed Oil on Fertility and Milk Quality in Sarda Ewes. Animals (Basel) 2023; 13:ani13020280. [PMID: 36670820 PMCID: PMC9854766 DOI: 10.3390/ani13020280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 12/21/2022] [Accepted: 01/08/2023] [Indexed: 01/15/2023] Open
Abstract
The aim of the present study was to assess whether the strategic supplementation of bypass LO can enhance reproductive indexes—fertility, lambing rate, and prolificacy—in dairy Sarda ewes at the end of lactation. To assess whether LO supplementation leads to the adsorptions of PUFAs and their subsequent utilization by the body tissues, milk composition and fatty acid content were analyzed. Forty-eight ewes were assigned to the following groups: the control group (CT; N = 24), fed with a control diet without LO; and the treatment group (LO; N = 24), fed with a diet supplemented with LO (10.8 g/ewe/day). Both diets had similar crude protein and energy levels and were offered for 38 days (−21 to +17 days after artificial insemination). The trial included an adaptation period (7 days) followed by a regular supplementation (31 days) period. Estrus synchronization was induced in all the ewes using an intravaginal sponge and equine chorionic gonadotropin. Fifty-five hours after pessaries withdrawal, all ewes were inseminated using the cervical route and fresh semen. Cholesterol (p < 0.01), high-density lipoprotein (p < 0.001), and triglyceride (p < 0.05) levels in plasma were higher in the LO group. Plasmatic levels of non-esterified fatty acids were lower in the LO group after the end of the supplementation period (p < 0.05). Milk unsaturated fatty acids (UFAs), monounsaturated fatty acids (MUFAs), total polyunsaturated fatty acids (PUFAs), PUFAs omega 3 (PUFAs-ω3) and 6 (PUFAs-ω6), and trans fatty acids were higher in the LO group (p < 0.001), while saturated fatty acids (SFAs) were higher in the CT group during the supplementation period (p < 0.001). Three days after the end of the supplementation period, the content of milk UFAs (p < 0.05), PUFAs (p < 0.001), MUFAs, and PUFAs-ω6 (p < 0.01) were still higher in the LO group. whereas SFA was higher in the CT group (p < 0.01). There was no difference between groups in terms of ovulation rate, progesterone levels in plasma, fertility rate, prolificacy, and total reproductive wastage. However, the total area of luteal tissue was higher in the LO group (p < 0.01). Results obtained demonstrated that LO supplementation exerts a positive role in corpus luteum size at the onset of the peri-implantation period in Sarda dairy ewes. Additionally, the results obtained in the present study showed that the use of dietary bypass LO affects lipid metabolites in plasma and milk fatty acid profiles, demonstrating the ALA uptake by body tissues.
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Affiliation(s)
- Ignacio Contreras-Solís
- Veterinary Medicine Department, Sassari University, 07100 Sassari, Italy
- Correspondence: (I.C.-S.); (G.M.)
| | - Cristian Porcu
- Veterinary Medicine Department, Sassari University, 07100 Sassari, Italy
| | | | - Fabrizio Chessa
- Department of Animal Science, AGRIS Sardegna, Loc. Bonassai, 07100 Sassari, Italy
| | - Valeria Pasciu
- Veterinary Medicine Department, Sassari University, 07100 Sassari, Italy
| | - Maria Dattena
- Department of Animal Science, AGRIS Sardegna, Loc. Bonassai, 07100 Sassari, Italy
| | - Marco Caredda
- Department of Animal Science, AGRIS Sardegna, Loc. Bonassai, 07100 Sassari, Italy
| | | | - Giovanni Molle
- Department of Animal Science, AGRIS Sardegna, Loc. Bonassai, 07100 Sassari, Italy
- Correspondence: (I.C.-S.); (G.M.)
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Corpora lutea affect in vitro maturation of bovine cumulus-oocyte complexes and embryonic development after fertilization with sex-sorted or conventional semen. Trop Anim Health Prod 2020; 52:3493-3499. [PMID: 32935324 DOI: 10.1007/s11250-020-02383-7] [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: 02/28/2020] [Accepted: 09/10/2020] [Indexed: 10/23/2022]
Abstract
Influence of both the presence of a corpus luteum on the ovary and semen sex-sorting on development following in vitro fertilization is not yet conclusive. To determine the effect of these factors, 376 bovine oocytes were processed in vitro according to luteal presence on the ovary (CL+ and CL-) and type of semen used (sexed or conventional). Maturation rate was higher (P < 0.01) in CL- (136/138; 98.6%) than in CL+ (217/238; 91.2%). Cleavage rate was lower (P < 0.01) in CL+ with sexed semen (60/172; 34.9%) than in CL- with sexed semen (42/71; 59.1%), CL+ with conventional semen (47/66; 71.2%), and CL- with conventional semen (54/67; 85.1%). Compaction was similar (P = 0.69) in CL- (49/99; 49.4%) and CL+ (50/107; 46.7%). Blastulation rate was higher (P < 0.01) in CL- (26/99, 26.2%) than in CL+ (13/107; 12.1%) group. Expansion rate was higher (P = 0.01) in CL- (22/99; 22%) than in CL+ (11/107; 10.2%) group. Compaction rates were similar (P = 0.78) in sex-sorted (50/102; 49.0%) or conventional semen (49/104; 47.1%) groups. Blastulation was also similar (P = 0.91) with sex-sorted semen (19/102; 18.6%) and conventional semen (20/104; 19.2%). The rate of expanded blastocysts was similar (P = 0.89) in sex-sorted (16/102; 15.6%) and conventional (17/104; 16.3%) semen groups. In conclusion, the presence of CL can compromise maturation of the oocytes and their development, as a higher proportion of cleavage-stage embryos can be obtained with non-sexed semen with oocytes from ovaries without a CL.
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Argudo DE, Tenemaza MA, Merchán SL, Balvoa JA, Méndez MS, Soria ME, Galarza LR, Ayala LE, Hernández-Fonseca HJ, Perea MS, Perea FP. Intraovarian influence of bovine corpus luteum on oocyte morphometry and developmental competence, embryo production and cryotolerance. Theriogenology 2020; 155:232-239. [PMID: 32758994 DOI: 10.1016/j.theriogenology.2020.05.044] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 04/28/2020] [Accepted: 05/30/2020] [Indexed: 12/25/2022]
Abstract
Three experiments were conducted to determine influence of the bovine corpus luteum (CL) on morphometric and functional characteristics of oocytes, and subsequent embryonic development. Cumulus-oocyte complexes were aspirated from two types of cows: 1) with a CL in one ovary (CL+) and without a CL in the contralateral ovary (CL-), 2) and from cows without CL in either ovary (C). Intracellular activity of the enzyme glucose-6-phosphate dehydrogenase (G6PDH), oocyte diameter and thickness of the zona pellucida were determined (Experiment 1). Then, the rate of in vitro oocyte maturation for each ovarian category was evaluated and oocyte diameter and zona pellucida thickness were measured after maturation (Experiment 2). In Experiment 3, in vitro embryo production and cryotolerance were assessed. The oocyte diameter was greater (P < 0.01) and the zona pellucida was thinner in CL+ than in CL- (P > 0.05) or C (P = 0.0131) ovaries. Activity of G6PDH was lower in oocytes from CL+ than CL- (P < 0.01) and C (P = 0.0148) ovaries. Rate of oocyte maturation, oocyte diameter and thickness of the zona pellucida after maturation did not differ among groups. Rate of cleavage was greater in zygotes from CL+ than from CL- or C (P < 0.01); and CL+ ovaries produced more total embryos on day 7 (P < 0.05) and more blastocysts (P < 0.01) than CL- and C ovaries. Rate of expansion and hatching of day-7 vitrified-warmed blastocysts at 24 and 48 h of culture did not differ among groups. In conclusion, oocytes collected from CL+ ovaries were larger and metabolically more prepared to continue maturation than those from ovaries lacking a CL. Also, rates of cleavage and yield of blastocysts were greater for oocytes from CL+ ovaries than from CL- and C ovaries. These findings indicate that a CL influenced oocyte developmental competence and embryonic development, presumably through intraovarian interactions.
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Affiliation(s)
- Daniel E Argudo
- Unidad Académica de Ciencias Agropecuarias, Universidad Católica de Cuenca, Ecuador
| | - Milton A Tenemaza
- Laboratorio de Biotecnologías de la Reproducción Animal, Facultad de Ciencias Agropecuarias. Universidad de Cuenca, Ecuador
| | - Shirley L Merchán
- Laboratorio de Biotecnologías de la Reproducción Animal, Facultad de Ciencias Agropecuarias. Universidad de Cuenca, Ecuador
| | - José A Balvoa
- Laboratorio de Biotecnologías de la Reproducción Animal, Facultad de Ciencias Agropecuarias. Universidad de Cuenca, Ecuador
| | - Maria S Méndez
- Laboratorio de Biotecnologías de la Reproducción Animal, Facultad de Ciencias Agropecuarias. Universidad de Cuenca, Ecuador
| | - Manuel E Soria
- Laboratorio de Biotecnologías de la Reproducción Animal, Facultad de Ciencias Agropecuarias. Universidad de Cuenca, Ecuador
| | - Luis R Galarza
- Laboratorio de Biotecnologías de la Reproducción Animal, Facultad de Ciencias Agropecuarias. Universidad de Cuenca, Ecuador
| | - Luis E Ayala
- Laboratorio de Biotecnologías de la Reproducción Animal, Facultad de Ciencias Agropecuarias. Universidad de Cuenca, Ecuador
| | | | - Mariana S Perea
- Facultad de Ciencias Veterinarias, Universidad del Zulia, Venezuela
| | - Fernando P Perea
- Departamento de Ciencias Agrarias, Universidad de Los Andes, Trujillo, Venezuela.
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Peralta-Torres JA, Aké-López JR, Segura-Correa JC, Aké-Villanueva JR. Effect of season on follicular population, quality and nuclear maturation of bovine oocytes under tropical conditions. Anim Reprod Sci 2017; 187:47-53. [PMID: 29017744 DOI: 10.1016/j.anireprosci.2017.10.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Revised: 09/12/2017] [Accepted: 10/04/2017] [Indexed: 10/18/2022]
Abstract
The aim was to determine the effect of season of the year and the presence of a corpus luteum (CL) on follicular population (FP) and the quality of the oocytes, and of season on nuclear maturation of the bovine oocytes under tropical conditions. Three seasons were evaluated: hot-dry (March-June), hot-humid (July-October) and fresh-humid (November-February). In a first study, 1112 bovine ovaries were obtained from a local slaughterhouse. Follicles were classified as small (≤4mm), middle (4.1-8mm) and large (≥8.1mm); and the maximum diameter of the follicle (MDF) and CL (MDCL) were also recorded. The oocytes were collected by aspiration and classified as viable (grade I and II) and damaged (grade III and IV). In the second study, 2261 viable oocytes were matured in vitro, and then fixed and stained with Lacmoid to classify the stage of development as mature (metaphase II), immature or degenerate. Data were analyzed using analysis of variance and chi-square procedures. The largest FP of large follicles (0.67), MDF (1.18mm), MDCL (1.87mm), and the highest proportion of viable oocytes (34.19%) were obtained during the hot-humid season (P<0.05). The ovaries without CL had the greatest FP (10.34) with more viable oocytes (24.44%). The highest proportion of mature oocytes (76.92%) was also obtained in the hot-humid season. In conclusion, season influenced FP, MDF, MDCL, and the quality and nuclear maturation of oocytes. The presence of a CL in the ovary resulted in a decrease of FP and viability of oocytes.
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Affiliation(s)
- Jorge Alonso Peralta-Torres
- División Académica de Ciencias Agropecuarias. Universidad Juárez Autónoma de Tabasco, Carretera Villahermosa-Teapa Km. 25, R/A La Huasteca 2ª Sección, ZP 86280 Villahermosa, Tabasco, Mexico.
| | - Jesús Ricardo Aké-López
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Yucatán, Carretera Mérida-Xmatkuil Km. 15.5, ZP, 97100 Mérida, Yucatán, Mexico
| | - José Candelario Segura-Correa
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Yucatán, Carretera Mérida-Xmatkuil Km. 15.5, ZP, 97100 Mérida, Yucatán, Mexico
| | - Jesús Ricardo Aké-Villanueva
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Yucatán, Carretera Mérida-Xmatkuil Km. 15.5, ZP, 97100 Mérida, Yucatán, Mexico
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Hajarian H, Shahsavari MH, Karami-shabankareh H, Dashtizad M. The presence of corpus luteum may have a negative impact on in vitro developmental competency of bovine oocytes. Reprod Biol 2016; 16:47-52. [DOI: 10.1016/j.repbio.2015.12.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2015] [Revised: 12/17/2015] [Accepted: 12/30/2015] [Indexed: 11/29/2022]
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Figueira LM, Fonseca JF, Arashiro EKN, Souza-Fabjan JMG, Ribeiro ACS, Oba E, Viana JHM, Brandão FZ. Colour Doppler Ultrasonography as a Tool to Assess Luteal Function in Santa Inês Ewes. Reprod Domest Anim 2015; 50:643-50. [DOI: 10.1111/rda.12543] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2015] [Accepted: 04/25/2015] [Indexed: 11/28/2022]
Affiliation(s)
- LM Figueira
- Universidade Federal Fluminense; Niterói RJ Brazil
| | - JF Fonseca
- Embrapa Caprinos e Ovinos; Sobral CE Brazil
| | | | | | - ACS Ribeiro
- Universidade Federal Fluminense; Niterói RJ Brazil
| | - E Oba
- Universidade Estadual Paulista; Botucatu SP Brazil
| | - JHM Viana
- Embrapa Gado de Leite; Juiz de Fora MG Brazil
| | - FZ Brandão
- Universidade Federal Fluminense; Niterói RJ Brazil
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Kor NM. The effect of corpus luteum on hormonal composition of follicular fluid from different sized follicles and their relationship to serum concentrations in dairy cows. ASIAN PAC J TROP MED 2014; 7S1:S282-8. [DOI: 10.1016/s1995-7645(14)60247-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Revised: 06/02/2014] [Accepted: 06/12/2014] [Indexed: 11/26/2022] Open
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Prolific strains of Barbarine sheep are characterized by increased ovulation rate due to extended period of ovulatory follicle recruitment and co-dominance effects. Small Rumin Res 2013. [DOI: 10.1016/j.smallrumres.2013.05.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Berlinguer F, Gonzalez-Bulnes A, Contreras-Solis I, Spezzigu A, Torres-Rovira L, Succu S, Naitana S, Leoni GG. Glucogenic supply increases oocyte developmental competence in sheep. Reprod Fertil Dev 2013; 24:1055-62. [PMID: 23043792 DOI: 10.1071/rd11299] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Accepted: 02/28/2012] [Indexed: 11/23/2022] Open
Abstract
The present study aimed to determine the influence of a glucogenic supply on oocyte developmental competence. Oestrous cycles were synchronised in 22 Sarda ewes by the insertion (Day 0) of one intravaginal progestagen-impregnated sponge that was removed after 6 days. After removal, the ewes were randomly allocated into two experimental groups (treated and control ewes) and, from Day 7 to Day 11, treated ewes received oral administration of a glucogenic mixture, whereas control animals received water. Follicular development was stimulated by FSH administration from Days 8 to 10. Glucose metabolism was assessed from Days 7 to 11, whilst follicle and corpus luteum growth dynamics and functionality were evaluated between Days 6 and 11. At Day 11 ovaries were collected and processed for in vitro embryo production. Glucogenic treatment increased both the plasma levels of glucose, progesterone, oestradiol and the number of 2-3-mm follicles (P < 0.05). Higher fertilisation and blastocyst rates (P < 0.05) were obtained after IVM of oocytes recovered from treated ewes compared with control ones. In conclusion, glucogenic treatment modifies follicle and corpus luteum functionality and improves oocyte quality, as evaluated by in vitro developmental kinetics and blastocyst output.
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Affiliation(s)
- F Berlinguer
- Department of Animal Biology, University of Sassari, Via Vienna 2, 07100 Sassari, Italy.
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Parraguez VH, Urquieta B, Pérez L, Castellaro G, De los Reyes M, Torres-Rovira L, Aguado-Martínez A, Astiz S, González-Bulnes A. Fertility in a high-altitude environment is compromised by luteal dysfunction: the relative roles of hypoxia and oxidative stress. Reprod Biol Endocrinol 2013; 11:24. [PMID: 23521851 PMCID: PMC3614875 DOI: 10.1186/1477-7827-11-24] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2012] [Accepted: 03/13/2013] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND At high altitudes, hypoxia, oxidative stress or both compromise sheep fertility. In the present work, we tested the relative effect of short- or long-term exposure to high altitude hypobaric hypoxia and oxidative stress on corpora luteal structure and function. METHODS The growth dynamics of the corpora lutea during the estrous cycle were studied daily by ultrasonography in cycling sheep that were either native or naïve to high-altitude conditions and that were supplemented or not supplemented with antioxidant vitamins. Arterial and venous blood samples were simultaneously drawn for determination of gases and oxidative stress biomarkers and progesterone measurement. On day five after ovulation in the next cycle, the ovaries were removed for immunodetection of luteal HIF-1alpha and VEGF and IGF-I and to detect IGF-II gene expression. RESULTS The results showed that both short- and long-term exposure to high-altitude conditions decreased luteal growth and IGF-I and IGF-II gene expression but increased HIF-1 alpha and VEGF immunoexpression. The level of plasma progesterone was also increased at a high altitude, although an association with increased corpus luteum vascularization was only found in sheep native to a high-altitude location. Administration of antioxidant vitamins resulted in a limited effect, which was restricted to decreased expression of oxidative stress biomarkers and luteal HIF-1alpha and VEGF immunoexpression. CONCLUSIONS Exposure of the sheep to high-altitude hypobaric hypoxia for short or long time periods affects the development and function of the corpus luteum. Moreover, the observed association of oxidative stress with hypoxia and the absence of any significant effect of antioxidant vitamins on most anatomical and functional corpus luteum traits suggests that the effects of high altitude on this ovarian structure are mainly mediated by hypoxia. Thus, these findings may help explain the decrease in sheep fertility at a high altitude.
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Affiliation(s)
- Víctor H Parraguez
- Faculty of Veterinary Sciences, University of Chile, Casilla 2, Correo 15, La Granja, Santiago, Chile
- Faculty of Agricultural Sciences, University of Chile, Casilla 2, Correo 15, La Granja, Santiago, Chile
- International Centre for Andean Studies, University of Chile, Casilla 2, Correo 15, La Granja, Santiago, Chile
| | - Bessie Urquieta
- Faculty of Veterinary Sciences, University of Chile, Casilla 2, Correo 15, La Granja, Santiago, Chile
| | - Laura Pérez
- Faculty of Veterinary Sciences, University of Chile, Casilla 2, Correo 15, La Granja, Santiago, Chile
| | - Giorgio Castellaro
- Faculty of Agricultural Sciences, University of Chile, Casilla 2, Correo 15, La Granja, Santiago, Chile
| | - Mónica De los Reyes
- Faculty of Veterinary Sciences, University of Chile, Casilla 2, Correo 15, La Granja, Santiago, Chile
| | - Laura Torres-Rovira
- Department of Animal Biology, University of Sassari, Via Vienna 2, Sassari, 07100, Italy
| | - Adriana Aguado-Martínez
- SALUVET, Animal Health Department, Faculty of Veterinary Sciences, Complutense University of Madrid, Ciudad Universitaria s/n, Madrid, 28040, Spain
| | - Susana Astiz
- Department of Animal Reproduction, INIA, Av. Puerta de Hierro s/n, Madrid, 28040, Spain
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Effects of oestrus induction with progestagens or prostaglandin analogues on ovarian and pituitary function in sheep. Anim Reprod Sci 2011; 126:61-9. [DOI: 10.1016/j.anireprosci.2011.04.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2010] [Revised: 04/11/2011] [Accepted: 04/20/2011] [Indexed: 11/20/2022]
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Martemucci G, D'Alessandro AG. Synchronization of oestrus and ovulation by short time combined FGA, PGF(2α), GnRH, eCG treatments for natural service or AI fixed-time. Anim Reprod Sci 2010; 123:32-9. [PMID: 21176867 DOI: 10.1016/j.anireprosci.2010.11.007] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2010] [Revised: 10/20/2010] [Accepted: 11/19/2010] [Indexed: 11/29/2022]
Abstract
Two experiments were conducted in ewes in order to develop an oestrus-ovulation short time synchronization protocol based on combined FGA, PGF(2α), GnRH, eCG treatments, for use in dairy sheep before natural service (Experiment 1) or for fixed-time artificial insemination (Experiment 2), during the breeding season. In Experiment 1 seventy-five non-lactating dairy ewes were subdivided into 5 treatment groups (N=15): (1) Group Fe - control, which received FGA vaginal sponges (14 days)+eCG (Day 14); (2) Group FPe, FGA (5 days)+PGF(2α) (Day 5)+eCG (Day 5); (3) Group PFe, PGF(2α) (Day 0)+FGA (5 days)+eCG (Day 5); (4) Group PFG, PGF(2α) (Day 0)+FGA (5 days)+GnRH (30h after sponge removal, s.r.); (5) Group GPe, GnRH (Day 0)+PGF(2α) (Day 5)+eCG (Day 5). Ewes were checked for oestrus and hand-mated. Time of ovulation was recorded by laparoscopy for 10 animals from each treatment. The percentages of female in oestrus and the interval to oestrus (h after treatment), fertility and prolificacy rate were recorded. There were no treatment differences in the percentage of females in oestrus. The interval to oestrus was earlier in Fe Group and delayed in FPe Group (P<0.01). Ovulation time was earlier in GPe Group compared to FPe Group (P<0.05). Fertility rates were significantly different (P<0.05) between the PFe and the FPeG Groups compared with the PFG Group. No significant differences were observed in prolificacy among the treatments. In Experiment 2, sixty dry ewes were subdivided (N=20) into the following three experimental treatment groups: (1) Group FP, FGA (5 days)+PGF(2α) (Day 5); (2) Group FPG, FGA (5 days)+PGF(2α) (Day 5)+GnRH (30hs.r.); (3) Group FPeG, FGA (5 days)+PGF(2α) (Day 5)+eCG (Day 5)+GnRH (30hs.r.). These were further subdivided into two groups (N=10) corresponding to 52 and 60hs.r. fixed-time insemination. Laparoscopic intrauterine insemination was performed with frozen semen (80×10(6)spermatozoa/dose) and ovulation time was recorded in a subgroup (N=10). GnRH resulted in an earlier ovulation time (P<0.05) in FPG and FPeG Groups (53.0h vs 61.6h). Fertility rate was higher in FPeG treated ewes inseminated at 60hs.r. (60%, 6/10). In FP and FPG Groups fertility rates were higher following insemination at 52hs.r. (50.0 and 40.0%).
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Affiliation(s)
- G Martemucci
- Department of Progettazione e Gestione dei Sistemi Agro-Zootecnici e Forestali - PRO.GE.S.A., University of Bari, Via Amendola 165/A, Bari, Italy.
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Shabankareh HK, Habibizad J, Sarsaifi K, Cheghamirza K, Jasemi VK. The effect of the absence or presence of a corpus luteum on the ovarian follicular population and serum oestradiol concentrations during the estrous cycle in Sanjabi ewes. Small Rumin Res 2010. [DOI: 10.1016/j.smallrumres.2010.06.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Shabankareh HK, Habibizad J, Torki M. Corpus luteum function following single and double ovulation during estrous cycle in Sanjabi ewes. Anim Reprod Sci 2009; 114:362-9. [DOI: 10.1016/j.anireprosci.2008.10.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2008] [Revised: 09/28/2008] [Accepted: 10/10/2008] [Indexed: 10/21/2022]
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16
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Contreras-Solis I, Vasquez B, Diaz T, Letelier C, Lopez-Sebastian A, Gonzalez-Bulnes A. Ovarian and endocrine responses in tropical sheep treated with reduced doses of cloprostenol. Anim Reprod Sci 2009; 114:384-92. [DOI: 10.1016/j.anireprosci.2008.10.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2008] [Revised: 09/08/2008] [Accepted: 10/15/2008] [Indexed: 11/28/2022]
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Xu M, West-Farrell ER, Stouffer RL, Shea LD, Woodruff TK, Zelinski MB. Encapsulated three-dimensional culture supports development of nonhuman primate secondary follicles. Biol Reprod 2009; 81:587-94. [PMID: 19474063 DOI: 10.1095/biolreprod.108.074732] [Citation(s) in RCA: 139] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
In vitro ovarian follicle cultures may provide fertility-preserving options to women facing premature infertility due to cancer therapies. An encapsulated three-dimensional (3-D) culture system utilizing biomaterials to maintain cell-cell communication and support follicle development to produce a mature oocyte has been developed for the mouse. We tested whether this encapsulated 3-D system would also support development of nonhuman primate preantral follicles, for which in vitro growth has not been reported. Three questions were investigated: Does the cycle stage at which the follicles are isolated affect follicle development? Does the rigidity of the hydrogel influence follicle survival and growth? Do follicles require luteinizing hormone (LH), in addition to follicle-stimulating hormone (FSH), for steroidogenesis? Secondary follicles were isolated from adult rhesus monkeys, encapsulated within alginate hydrogels, and cultured individually for </=30 days. Follicles isolated from the follicular phase of the menstrual cycle had a higher survival rate (P < 0.05) than those isolated from the luteal phase; however, this difference may also be attributed to differing sizes of follicles isolated during the different stages. Follicles survived and grew in two hydrogel conditions (0.5% and 0.25% alginate). Follicle diameters increased to a greater extent (P < 0.05) in the presence of FSH alone than in FSH plus LH. Regardless of gonadotropin treatment, follicles produced estradiol, androstenedione, and progesterone by 14-30 days in vitro. Thus, an alginate hydrogel maintains the 3-D structure of individual secondary macaque follicles, permits follicle growth, and supports steroidogenesis for </=30 days in vitro. This study documents the first use of the alginate system to maintain primate tissue architecture, and findings suggest that encapsulated 3-D culture will be successful in supporting the in vitro development of human follicles.
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Affiliation(s)
- Min Xu
- Department of Obstetrics and Gynecology, Northwestern University Feinberg School of Medicine, and The Robert H. Lurie Comprehensive Cancer Center of Northwestern University, Chicago, Illinois, USA
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Efficiency of estrous synchronization in tropical sheep by combining short-interval cloprostenol-based protocols and “male effect”. Theriogenology 2009; 71:1018-25. [DOI: 10.1016/j.theriogenology.2008.11.004] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2008] [Revised: 11/18/2008] [Accepted: 11/19/2008] [Indexed: 11/17/2022]
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