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Feres LFR, Siqueira LGB, Palhao MP, Dos Santos LL, Pfeifer LFM, Fernandes CADC, Viana JHM. Selecting oocyte donors based on anti-Müllerian hormone (AMH) concentrations: A critical analysis of using cutoff values as exclusion criterion for an in vitro embryo production program in Gir cattle. Anim Reprod Sci 2024; 266:107491. [PMID: 38754337 DOI: 10.1016/j.anireprosci.2024.107491] [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: 09/30/2023] [Revised: 03/13/2024] [Accepted: 04/28/2024] [Indexed: 05/18/2024]
Abstract
The aims of this study were to determine anti-müllerian hormone (AMH) cutoff values for selecting Gir (Bos taurus indicus) oocyte donors and estimate the impact of using AMH concentrations as a selection criterion. In Exp. 1, Gir heifers (n=120) were sampled for AMH analysis and submitted to ovum pick-up and in vitro embryo production (OPU-IVEP). AMH cutoff values were calculated using ROC analysis or, alternatively, by the successive exclusion of heifers with the lowest AMH values. The correlations between AMH and OPU-IVEP outcomes were significant (P<0.001), though low or moderate (r= 0.34-0.52). We estimated an improvement (P<0.05) after the use of AMH cutoff values to select donors of +15.3% for total oocyes, +19.4% for viable COC, and +23.4% for blastocysts. This selection pressure, however, led to the exclusion of 32.8%, 37.9%, and 50.0% of the initial potential donors, respectively. In Exp. 2, we analyzed data from OPU-IVEP sessions of 658 Gir donors with known genomic values for predicted transmitting ability for milk (GPTAm) and age at first calving (GPTAafc). The selection based on the number of oocytes recovered had no effect (P>0.05) on the average GPTAm nor GPTAafc values of the remaining donors. In summary, plasma AMH ≥700 pg/mL is a cutoff value that can be used to select Gir heifers with a greater potential as oocyte donors. Nevertheless, this selection leads to the exclusion of up to 50% of potential donors. Finally, exclusion of poor responders had no effect on mean genomic estimates for milk production or age at first calving in the selected subset of donors.
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Affiliation(s)
| | | | | | | | | | | | - Joao Henrique Moreira Viana
- Universidade José do Rosário Vellano, Alfenas, MG 37130-000, Brazil; Embrapa Recursos Genéticos e Biotecnologia, Brasília, DF 70770-901, Brazil.
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Xavier MC, Martins LP, Moura RM, Morais DF, Barbosa JVL, Figueiredo RA, Peixer MAS, de Andrade RV, Viana JHM. Evaluation of the effects of the recommended oral dose of diflubenzuron on bovine sperm and oocyte quality using CASA and OPU-IVEP. Front Vet Sci 2023; 10:1215722. [PMID: 37496752 PMCID: PMC10366606 DOI: 10.3389/fvets.2023.1215722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Accepted: 06/26/2023] [Indexed: 07/28/2023] Open
Abstract
Introduction The aim of this study was to evaluate potential effects of diflubenzuron on the production and quality of gametes, and on in vitro embryo production (IVEP) outcomes, in cattle. Methods Two experiments were performed, the first to evaluate effects on semen, and the second on cumulus-oocyte complexes (COC) and on IVEP. Nelore (Bos taurus indicus) bulls (n = 14) or heifers (n = 16) were allocated into control (CG) or treatment (DIF) groups. All groups received a mineral mix supplement added (DIF) or not (CG) with diflubenzuron (30 mg/head/day), during 8 weeks. Animals were weighed and blood samples were collected throughout the experimental period. Every other week, bulls were subjected to semen collection and heifers to transvaginal ultrasound-guided follicle aspiration sessions. Semen underwent physical and morphological evaluation, and samples were stored for further computer-assisted sperm analysis. The COC recovered were evaluated according to morphology and those classified as viable were sent to an IVEP laboratory. Results Diflubenzuron had no effect (P > 0.05) on average body weight or in any blood hematological or biochemical endpoints, regardless of gender. In experiment 1, there was no difference (P > 0.05) between DIF and CG groups for sperm concentration, morphology, or kinetics. In experiment 2, there was also no effect of diflubenzuron on the number of total, viable, or grade I oocytes, as well as on cleavage or blastocyst rates (P > 0.05). Discussion In summary, the oral administration of diflubenzuron, within the recommended dose, has no short-term negative effects on sperm production and quality or on oocyte yield and developmental potential in vitro, in cattle.
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Affiliation(s)
- Marcelo Cunha Xavier
- Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, DF, Brazil
- Bio Biotecnologia da Reprodução Animal, Brasília, DF, Brazil
| | - Leticia Prates Martins
- Programa de Pós-Graduação em Biologia Animal, Universidade de Brasília, Brasília, DF, Brazil
| | - Rodrigo Martins Moura
- Programa de Pós-Graduação em Biologia Animal, Universidade de Brasília, Brasília, DF, Brazil
| | - Divino Fabio Morais
- Departamento de Medicina Veterinária, Centro Universitário de Brasília, Brasília, DF, Brazil
| | - Joao Vitor Lima Barbosa
- Departamento de Medicina Veterinária, Centro Universitário de Brasília, Brasília, DF, Brazil
| | | | | | - Rosangela Vieira de Andrade
- Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, DF, Brazil
| | - Joao Henrique Moreira Viana
- Programa de Pós-Graduação em Biologia Animal, Universidade de Brasília, Brasília, DF, Brazil
- Embrapa Recursos Genéticos e Biotecnologia, Brasília, DF, Brazil
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Carvalheira LDR, Santos GBD, Jasmim, Guimarães CR, Campos MM, Machado FS, Pedroso AM, Silva TED, Nogueira LAG, Rodrigues ALR, Carvalho BCD. Diet crude protein reduction on follicular fluid and cumulus-oocyte complexes of mid-lactating Girolando cows. Anim Reprod 2022; 19:e20210088. [PMID: 36156883 PMCID: PMC9484397 DOI: 10.1590/1984-3143-ar2021-0088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Accepted: 08/25/2022] [Indexed: 11/21/2022] Open
Affiliation(s)
| | | | - Jasmim
- Universidade Federal do Rio de Janeiro, Brasil
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Nawaz M, Saleem M, Ullah F, Shabbir Khan G, Zahoor I, Ahmad N, Riaz A. Exogenous progesterone-dependent modulation in the follicular dynamics of Bos indicus cattle undergoing repeated ovum pick-up sessions. Reprod Domest Anim 2021; 57:55-63. [PMID: 34670003 DOI: 10.1111/rda.14028] [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: 08/14/2021] [Accepted: 10/11/2021] [Indexed: 10/20/2022]
Abstract
The objective of the present study was to evaluate the role of serum progesterone (P4) in follicular dynamics, oocytes' recovery and quality and their in vitro developmental competence during consecutive ovum pick-up (OPU) sessions in Bos indicus dairy cows. Wave-synchronized Sahiwal cattle (n = 20) were randomly divided into treatment (n = 10) and control (n = 10) groups. CIDR was used as a source of external progesterone in the treatment group. Four consecutive OPU sessions at 96-hr intervals were conducted and repeated ultrasonography at 12-hr intervals was done to monitor follicular dynamics. The viable oocytes were processed for IVC following IVM and IVF until day 7. The serum P4 concentrations in the P4 and control groups were recorded as 2.31 ± 0.059 versus.0.32 ± 0.065 ng/ml, respectively (p < .05). In the treatment group, the total number of recorded follicles was higher (p < .05; 12.05 ± 0.37 versus. 10.87 ± 0.40), whilst the growth rate (mm/day) of follicles was lower (p > .05). Per session recovered oocytes (5.31 ± 0.19 versus. 3.58 ± 0.21; p < .0001) and recovery rate (54.23 versus. 42.53%; p < .05) were also higher in the treatment group compared to control. Similarly, the viable oocytes (4.54 ± 0.187 versus. 3.06 ± 0.199) and the number of grade I and II oocytes per session (3.37 ± 0.196 versus. 2.06 ± 0.21) were higher (p < .05) in the treatment group compared with the control group. However, the nuclear maturation, cleavage, and blastocyst rate did not differ (p > .05) between the groups. Taken together, during OPU sessions, serum P4 improves oocytes' recovery and quality, whilst does not affect the in vitro developmental competence of recovered oocytes.
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Affiliation(s)
- Mudussar Nawaz
- Department of Theriogenology, Faculty of Veterinary Science, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Muhammad Saleem
- Department of Theriogenology, Faculty of Veterinary Science, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Farid Ullah
- Department of Theriogenology, Faculty of Veterinary Science, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Ghulam Shabbir Khan
- Department of Theriogenology, Faculty of Veterinary Science, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Imran Zahoor
- Department of Livestock Production, Faculty of Animal Production and Technology, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Nasim Ahmad
- Department of Theriogenology, Faculty of Veterinary Science, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Amjad Riaz
- Department of Theriogenology, Faculty of Veterinary Science, University of Veterinary and Animal Sciences, Lahore, Pakistan
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Silva LDA, de Mello MRB, Oliveira Pião DD, Silenciato LN, de Quadros TCO, de Souza AH, Barbero RP. Effects of experimental exposure to zearalenone on reproductive system morphometry, plasma oestrogen levels, and oocyte quality of beef heifer. Reprod Domest Anim 2021; 56:775-782. [PMID: 33606307 DOI: 10.1111/rda.13917] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Accepted: 02/17/2021] [Indexed: 12/26/2022]
Abstract
The aim of the present study was to evaluate the effects of zearalenone (ZEA) on the reproductive system morphometry, oestrogen (E2) levels and oocyte quality of beef heifers. Twenty non-pregnant purebred Nellore (Bos indicus) heifers [age, ≥18 months; initial body weight, 348 ± 30 kg (mean ± standard deviation)] were used. The animals were randomly divided into experimental group and a control group of 10 animals each. Group experimental was administered 300 ppb ZEA per os for 98 days, and the control group was administered placebo per os for 98 days. The administration of ZEA was carried out daily by adding mycotoxin to the diet. All heifers were evaluated weekly via rectal ultrasound examinations (12 weeks). Diameters of the right and left uterine horns, right and left ovaries, largest antral follicle and corpus luteum were measured. Vulva size was also measured. Blood samples were collected to estimate E2 levels. At the end of 12 weeks, the heifers were slaughtered, and the ovaries were sent to the laboratory for in vitro embryo production. A completely randomized design was adopted, and repeated measures analysis of variance (p < .05) was performed (except for oocyte quality). Vulva size (p = .0985); diameters of uterine horns (p = .0522), ovaries (p = .6955), antral follicles (p = .6355) and corpus luteum (p = .3808); and E2 levels (p = .3379) were not affected by the treatments. ZEA-contaminated diet significantly reduced (p = .05) the proportion of viable oocytes (49.4%, n = 207) compared with the control diet (59.9%, n = 222); however, the blastocyst rate did not differ between the groups (p = .9418). The results indicate that contamination of beef heifer's diet with 300 ppb ZEA affected neither morphometric parameters nor plasma oestrogen levels; however, ZEA contamination was detrimental to oocyte quality.
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Affiliation(s)
- Lucas de Almeida Silva
- Animal Science Graduate Program, Universidade Federal Rural do Rio de Janeiro, Seropédica, Brazil
| | | | | | - Lara Nogueira Silenciato
- Animal Science Graduate Program, Universidade Federal Rural do Rio de Janeiro, Seropédica, Brazil
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Collection and in vitro maturation of Mazama gouazoubira (brown brocket deer) oocytes obtained after ovarian stimulation. ZYGOTE 2021; 29:216-222. [PMID: 33446301 DOI: 10.1017/s0967199420000787] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
In vitro production of embryos has gained prominence as a tool for use in wildlife conservation programmes in situ and ex situ. However, the development of this technique depends on steps that include ovarian stimulation, collection and oocyte maturation. The purpose of this study was to assess the feasibility of an ovarian stimulation protocol for follicular aspiration, the efficiency of videolaparoscopy for follicular aspiration and test a medium for in vitro oocyte maturation for the species Mazama gouazoubira. Five females were submitted to repeated ovarian stimulation (hormone protocol using controlled internal drug release), and estradiol benzoate on D0 and eight injections of follicle-stimulating hormone, once every 12 h, from D4 onwards at 30-day intervals. Fourteen surgical procedures were performed in superstimulated females, resulting in the collection of 94 oocytes and an average of 17.1 ± 9.1 follicles observed, 13.5 ± 6.6 follicles aspirated and 7.2 ± 3.7 oocytes collected per surgery. After collection, the oocytes were submitted to in vitro maturation for 24 h and stained with Hoechst 33342 dye to evaluate their nuclear status; 64.5% of the oocytes reached MII and 16.1% were spontaneously activated by parthenogenesis. The nuclear status of oocytes that did not undergo in vitro maturation was evaluated; 80.9% were found to be immature.
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GUIMARÃES ASB, ROCHA LF, JESUS RDLD, VASCONCELOS GL, ANGHINONI G, SANTANA ALA, BARBOSA LP. In vitro performance of Zebu (Bos indicus) and Taurus (Bos taurus) donor cow embryos. REVISTA BRASILEIRA DE SAÚDE E PRODUÇÃO ANIMAL 2020. [DOI: 10.1590/s1519-994021200142020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
ABSTRACT In this study, the in vitro production of bovine embryos from zebu and taurine donors was compared. Cumulus-oocyte complexes (COCs) were obtained from 167 Bos taurus and 161 Bos indicus donors by ovum pick-up. COCs were classified based on their morphological quality, matured in incubators for 22 to 24 h in maturation medium, and then fertilized for 18 to 22 h. The zygotes were transferred to the culture medium for seven days. The embryos were classified as morula (OM), initial blastocyst (BI), blastocyst (BL), and expanded blastocyst (BX), before being transferred to synchronized recipient cows. Pregnancy was diagnosed 30-45 days post-transfer. The Bos indicus donors had a higher oocyte yield (n = 2556) than Bos taurus donors (n = 1903) (P = 0.008). The COCs from zebu donors had a better morphological quality than those from taurine donors (n = 689 vs. 444 for grade 1 COC, P < 0.0001; n = 681 vs. 509 for grade 2 COC, P = 0.010, for zebu and taurine donors, respectively). There were differences in embryo production percentages obtained from OM (0.44% from zebu and 6.42% from taurine, P = 0.017), BL (14.18% from zebu and 3.74% from taurine, P < 0.0001), and BX (81.43% from zebu and 75.13% from taurine, P < 0.0001). No significant difference was observed for embryo production from BI and pregnancy rate (P > 0.05). The Bos indicus cows showed greater oocyte recovery, number of viable oocytes, and production of viable embryos than the Bos taurus cows.
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Bervian dos Santos G, Brandão FZ, dos Santos Ribeiro L, Arashiro EKN, Viana de Grazia JG, de Almeida Camargo LS, Machado FS, Varago FC, Otto PI, Campos de Carvalho B. Metabolic, follicular and embryo production responses of postpartum crossbred Holstein × Gir dairy cows fed diets with different energy levels. ANIMAL PRODUCTION SCIENCE 2019. [DOI: 10.1071/an18090] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The objective of the present study was to evaluate the effect of two diets with different energy levels and two genetic groups (3/4 and 7/8 Holstein × Gir (HG) cows) on the metabolic and hormonal changes and on the production profile of oocytes and embryos in dairy cows during the early postpartum period. The concentrations of oestrogen, progesterone, glucose, insulin, insulin-like growth factor, urea and non-esterified fatty acids in follicular fluid, as well as blood plasma concentrations of glucose, insulin, urea and non-esterified fatty acids, were evaluated. Oocyte collection was performed every 14 days after parturition. After classification, the oocytes were submitted to in vitro embryo production and cleavage, and blastocyst rates were evaluated. Five days after oocyte collection, the dominant follicle was measured and punctured for follicular fluid retrieval. The high-energy diet increased plasmatic insulin and glucose. The 3/4 HG cows presented a higher plasmatic concentration of insulin, glucose and urea. The hormonal and metabolic changes in plasma were not observed in the follicular fluid. The follicular fluid concentration of IGF-I was increased in cows fed the high-energy diet as well as in the 3/4 HG cows. A higher number of total and viable oocytes was recovered in the 3/4 HG cows, but the 7/8 HG cows had a higher cleavage rate. In conclusion, the high-energy diet was more efficient in maintaining the energy status of crossbred cows, as evidenced by their plasma metabolites and follicular fluid, and 3/4 HG cows were more efficient than 7/8 HG cows at producing oocytes in the early postpartum period.
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Monteiro CAS, Saraiva HFRDA, Leal GR, Camargo AJDR, Serapião RV, Ferreira AMR, Rodrigues ALR, Nogueira LAG, Oliveira CS. Breed composition does not influence the performance of Holstein-Gyr crossbred as oocyte donors for OPU/IVP. Anim Reprod 2018; 15:71-74. [PMID: 33365098 PMCID: PMC7746215 DOI: 10.21451/1984-3143-2017-ar978] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Holstein-Gyr crossbred cattle are strategic for dairy systems in tropical countries, since
they combine milk yield genetics with adaptability to tropical climate. However, Holstein
(Bos taurus) and Gyr (Bos indicus) breeds present
remarkable differences regarding reproductive physiology. Brazil stands out as the world’s
largest user of embryo in vitro production (IVP) in bovine, and the use
of this technique is increasing in dairy systems. As Holstein-Gyr crossbreds are important
oocyte donors for IVP, the present work aimed at investigating whether increased Gyr or Holstein
breed composition influences donor’s performance. Sixteen Holstein-Gyr crossbred
females presenting increased (HG, 71.4 to 87.5% Holstein; n = 9) or decreased (GH, 40.2 to 46.6%
Holstein; n = 7) Holstein composition were submitted to three ovum pick up (OPU) sessions.
We observed similar (P = 0.2946) antral follicle count between HG and GH donors (24.8 ±
3.2 vs 29.4 ± 2.8 respectively; mean ± SEM). Groups also
display similar morphological oocyte grading (Grade I: 0.1 ± 0.1 vs
0.1 ± 0.1 – P = 0.9680; Grade II: 0.9 ± 0.5 vs 1.9 ±
0.5 – P = 0.1942; Grade III, 4.0 ± 1.2 vs 7.2 ± 1.4
– P = 0.1047, HG vs GH respectively; mean ± SEM). Additionally,
the proportion of viable oocyte was similar between HG and GH groups (27.8% vs
31.9%, respectively, P = 0.3500) and oocyte lipid area fraction (6.8% vs
9.5%, respectively; P = 0.1539). Our results indicate that the individual variation has more
influence than breed composition of crossbred oocyte donors.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Clara Slade Oliveira
- Embrapa Dairy Cattle, Laboratory of Animal Reproduction, Santa Monica Experimental Field (LRA-CESM), Valença, ,
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Feres LF, Siqueira LGB, Palhao MP, Dos Santos LL, Brandao FZ, Viana JHM. Likelihood of pregnancy after the transfer of embryos derived from follicle aspiration and in vitro embryo production sessions with different relative efficiencies. Anim Reprod Sci 2018; 193:165-170. [PMID: 29678568 DOI: 10.1016/j.anireprosci.2018.04.065] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Revised: 04/06/2018] [Accepted: 04/11/2018] [Indexed: 11/17/2022]
Abstract
The aim of the present study was to evaluate the likelihood of pregnancy of in vitro-produced (IVP) embryos from batches with distinct relative efficiencies. Data were retrospectively analyzed from 605 transvaginal ultrasonic-guided follicle aspiration sessions (OPU) followed by in vitro embryo production (IVEP) and 2456 fresh embryo transfers (ET), performed between 2008 and 2012 in individuals of the Gir (dairy Bos indicus) breed. The OPU and IVEP were performed using standard procedures by a single group of technicians at the same laboratory facility. Records were stratified into quartiles (I to IV) according to the total of cumulus-oocytes complexes (COC) produced per donor, or in percentile ranges (0%-25%, 26%-50%, 51%-75%, and 76%-100%) for endpoints related to COC quality or efficiency of embryo production. Pregnancy per embryo transfer (P/ET) was compared among quartiles or ranges using the chi-squared test. Donors producing a greater number of total COC (quartile I) also had more viable and grade I COC, and a greater number of embryos than donors ranked in quartiles II, III or IV, respectively (P < 0.0001). Nevertheless, P/ET did not differ (P > 0.05) among embryos produced by donors ranked in Quartiles I to IV. Similarly, there was no difference (P > 0.05) in P/ET for embryos derived from OPU sessions with a relatively greater or lesser percentage of viable or Grade I COC. Cleavage and blastocyst rates within each IVEP batch had no effect (P > 0.05) on P/ET. In conclusion, data suggest that there is no relationship among oocyte yield after OPU, or efficiency of IVEP, and the likelihood of pregnancy after ET of fresh IVP embryos.
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Affiliation(s)
- Luiz Fernando Feres
- Universidade Federal Fluminense, Niteroi, RJ, 24230-340, Brazil; Universidade Jose do Rosario Vellano, Alfenas, MG, 37130-000, Brazil
| | | | | | | | | | - Joao Henrique Moreira Viana
- Universidade Jose do Rosario Vellano, Alfenas, MG, 37130-000, Brazil; Embrapa Cenargen, PqEB, Av. W5 N, Brasilia, DF, 70770-917 Brazil.
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Effects of PI3K and FSH on steroidogenesis, viability and embryo development of the cumulus–oocyte complex after in vitro culture. ZYGOTE 2017; 26:50-61. [DOI: 10.1017/s0967199417000703] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
SummaryThe purpose of this study was to evaluate the effects of FSH and PI3K on the nuclear maturation, viability, steroidogenesis and embryo development of bovine cumulus–oocyte complexes (COCs). Oocyte maturation was achieved with MIV B, MIV B+100 µM LY294002, MIV B+10 ng/mL follicle stimulating hormone (FSH), or MIV B+10 ng/mL FSH+100 µM LY294002 treatments for 22–24 h. After the cultured COCs were denuded, oocytes were separated into those that extruded polar bodies (mature) and those that did not, and real-time polymerase chain reaction (PCR) for BAX, BCL2, LHR, FSHR, CYP11A1, CYP19A1 and HSD17B1 genes was performed. The culture medium was collected to determine the levels of 17β-estradiol (E2) and progesterone (P4). The trypan blue test was used to study COC viability, and embryo development was evaluated. FSH increased nuclear maturation and PI3K blocked the maturation but did not influence oocyte viability. BAX and BCL2 expression levels in the cumulus cells were only affected by FSH, and the BAX levels decreased after treatment with LY294002. FSH increased the levels of E2 and P4, however inhibition of PI3K decreased E2 levels. MIV B enhanced levels of LHR, FSHR, CYP11A1, CYP19A1 and HSD17B1, whereas LY294002 inhibited the expression levels of all genes. MIV B+FSH decreased the expression levels of all genes except CYP11A1. LY294002 did not demonstrate any effects in the presence of FSH. Embryo development was significantly decreased when the MIV B+FSH medium was used. In conclusion, FSH controls the steroidogenesis, viability and gene expression in COCs. PI3K plays essential roles in nuclear maturation, steroidogenesis and embryo development.
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Varago F, Silva L, Ribeiro J, Fernandes C, Carvalho B, Gioso MM, Moustacas V. Teofilina como agente capacitante do sêmen bovino. ARQ BRAS MED VET ZOO 2017. [DOI: 10.1590/1678-4162-9173] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
RESUMO Objetivou-se avaliar a teofilina como agente capacitante substituto ou associado à heparina sobre a reação acrossômica dos espermatozoides e o desenvolvimento de embriões produzidos in vitro. O experimento foi realizado com quatro touros e três tratamentos, totalizando 12 grupos experimentais. O sêmen dos touros foi avaliado nos tratamentos descritos a seguir: tratamento 1 (HEP): heparina - 10µg/mL; tratamento 2 (TEO): teofilina - 5mM; tratamento 3 (HEP + TEO): heparina (10µg/mL) + teofilina (5mM), por zero, seis, 12 e 18 horas, corados com trypan blue/Giemsa para avaliação da reação acrossômica. Para a produção dos embriões, os agentes capacitantes foram adicionados aos meios de fertilização. Na análise espermática, a taxa de reação acrossômica verdadeira foi maior (P<0,05) no tempo zero hora, enquanto para espermatozoides mortos, as maiores taxas (P<0,05) foram nos tempos de 12h (84,46±5,82) e 18h (86,75±4,19). A taxa de embriões produzidos (37,97±13) e a taxa de eclosão (33,50±14) foram maiores (P<0,05) para o tratamento HEP. Não foi observada diferença (P>0,05) entre touros na análise de reação acrossômica nem na PIVE. A utilização da teofilina foi tão eficiente quanto a da heparina na indução da reação acrossômica, no entanto resultou em menores taxas de produção embrionária.
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Affiliation(s)
- F.C. Varago
- Universidade José do Rosário Vellano, Brazil
| | - L.P. Silva
- Universidade José do Rosário Vellano, Brazil
| | | | | | | | - M. M. Gioso
- Universidade José do Rosário Vellano, Brazil
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Campos-Junior PHA, Alves TJM, Dias MT, Assunçao CM, Munk M, Mattos MS, Kraemer LR, Almeida BG, Russo RC, Barcelos L, Camargo LSA, Viana JHM. Ovarian Grafts 10 Days after Xenotransplantation: Folliculogenesis and Recovery of Viable Oocytes. PLoS One 2016; 11:e0158109. [PMID: 27362486 PMCID: PMC4928796 DOI: 10.1371/journal.pone.0158109] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Accepted: 06/12/2016] [Indexed: 11/30/2022] Open
Abstract
Ovarian xenotransplantation is a promising alternative to preserve fertility of oncologic patients. However, several functional aspects of this procedure remained to be addressed. The aim of this study was evaluate the feasibility of xenotransplantation as a strategy to maintain bovine ovarian grafts and produce oocytes. Adult ovarian cortical pieces were xenotransplanted to the dorsal subcutaneous of female NOD-SCID mice (n = 62). Grafts were recovered ten days after xenotransplantation. Host and graft weights; folliculogenesis progression; blood perfusion, relative gene expression and number of macrophage and neutrophil of xenografts; in vitro developmental competence of graft-derived oocytes were evaluated. Folliculogenesis was supported in the grafts, as indicated by the presence of primordial, primary, secondary, antral, and atretic follicles. The xenografts showed a greater volumetric density of atretic follicles and higher hyperemia and number of host-derived macrophage and neutrophil (P<0.05), when compared to non-grafted fragments. There was a higher blood perfusion under the back skin in the transplantation sites of host animals than in control and non-grafted (P<0.01). BAX and PRDX1 genes were up-regulated, while BCL2, FSHR, IGF1R and IGF2R were down-regulated, when compared to the control (P<0.01). Twenty seven oocytes were successfully harvested from grafts, and some of these oocytes were able to give rise to blastocysts after in vitro fertilization. However, cleavage and blastocyst rates of xenograft derived oocytes were lower than in control (P<0.01). Despite showing some functional modifications, the ovarian xenografts were able to support folliculogenesis and produce functional oocytes.
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Affiliation(s)
- Paulo Henrique Almeida Campos-Junior
- Fertility Preservation Research Group, Department of Natural Sciences, Federal University of Sao Joao Del Rei, Sao Joao Del Rei, Minas Gerais, Brazil, 36301–160
- * E-mail:
| | - Thalys Jair Melo Alves
- Fertility Preservation Research Group, Department of Natural Sciences, Federal University of Sao Joao Del Rei, Sao Joao Del Rei, Minas Gerais, Brazil, 36301–160
| | - Marco Tulio Dias
- Fertility Preservation Research Group, Department of Natural Sciences, Federal University of Sao Joao Del Rei, Sao Joao Del Rei, Minas Gerais, Brazil, 36301–160
| | - Carolina Marinho Assunçao
- Laboratory of Genetics and Biotechnology, Department of Biology, Federal University of Juiz de Fora, Juiz de Fora, Minas Gerais, Brazil, 36036–900
| | - Michele Munk
- Laboratory of Genetics and Biotechnology, Department of Biology, Federal University of Juiz de Fora, Juiz de Fora, Minas Gerais, Brazil, 36036–900
| | - Matheus Silvério Mattos
- Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil, 31270–901
| | - Lucas Rocha Kraemer
- Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil, 31270–901
| | - Brígida Gomes Almeida
- Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil, 31270–901
| | - Remo Castro Russo
- Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil, 31270–901
| | - Lucíola Barcelos
- Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil, 31270–901
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Martins JH, Santos CS, Silva MAV, Aguiar HMVSB, França IG, Pereira HG, Ribeiro DL, Chaves RM, Souza JAT, Monteiro BM, Sá Filho MF, Torres-Júnior JRS. Impact of puberty status and melengestrol acetate supplementation before the breeding period on reproductive efficiency of Bos indicus beef heifers. J Anim Sci 2015; 93:2796-805. [PMID: 26115267 DOI: 10.2527/jas.2015-8799] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Two experiments were designed to evaluate the impact of puberty status and the administration of melengestrol acetate (MGA) before onset of the breeding period on ovulatory responses (Exp. 1) and conception rate after AI performed on estrus detection during 10 d and the pregnancy rate through 80 d of breeding period (Exp. 2) of pasture-grazed beef heifers. In Exp. 1, heifers (15 pubertal and 15 prepubertal) received 0.5 mg per heifer/d -1 of MGA over 14 d. No differences in the ovulatory responses were found 10 d after the MGA administration (pubertal = 46.7% vs. prepubertal P = 53.3%; P = 0.72). In Exp. 2, 368 heifers were randomly assigned to groups according to pubertal status and the MGA treatment. All heifers were inseminated on estrus detection for up 10 d after MGA administration and following exposure to bulls between 20 and 80 d. The MGA-treated heifers exhibited a greater AI service rate than control heifers (72.1 vs. 41.6%;P < 0.01); however, heifers receiving MGA had lower conception results following AI (51.6 vs. 71.4%; P = 0.01). In addition, MGA-treated heifers were more likely to have a corpus luteum in the middle of the breeding period (95.3 vs. 87.5%;P < 0.01), although the Cox proportional hazard of pregnancy rate was similar (P = 0.29) at the end of the breeding period. At onset of the breeding period, pubertal heifers presented a greater pregnancy rate following AI (pubertal P = 42.2% vs. prepubertal P = 24.9%; P = 0.01). Therefore, pubertal heifers seem to have greater overall reproductive efficiency than prepubertal heifers, particularly at the beginning of the breeding period. Interestingly, administration of MGA before the onset of the breeding period increased AI service rate but did not alter the rate of pregnancy throughout the breeding period of pasture-grazed beef heifers.
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Ferraz ML, Sá Filho MF, Batista EOS, Watanabe YF, Watanabe MR, Dayan A, Joaquim DC, Accorsi MR, Gimenes LU, Vieira LM, Baruselli PS. Paradoxical effects of bovine somatotropin treatment on the ovarian follicular population and in vitro embryo production of lactating buffalo donors submitted to ovum pick-up. Anim Reprod Sci 2015; 154:1-7. [PMID: 25623138 DOI: 10.1016/j.anireprosci.2014.12.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2014] [Revised: 12/19/2014] [Accepted: 12/27/2014] [Indexed: 11/26/2022]
Abstract
The aim of the present study was to evaluate the effect of bovine somatotropin (bST; 500mg) administration on lactating buffalo donors submitted to two different ovum pick-up (OPU) and in vitro embryo production schemes with a 7 or 14d intersession OPU interval. A total of 16 lactating buffalo cows were randomly assigned into one of four experimental groups according to the bST treatment (bST or No-bST) and the OPU intersession interval (7 or 14d) in a 2×2 factorial design (16 weeks of OPU sessions). The females submitted to OPU every 14d had a larger (P<0.001) number of ovarian follicles suitable for puncture (15.6±0.7 vs. 12.8±0.4) and an increased (P=0.004) number of cumulus-oocyte complexes (COCs) recovered (10.0±0.5 vs. 8.5±0.3) compared to the 7d interval group. However, a 7 or 14d interval between OPU sessions had no effect (P=0.34) on the number of blastocysts produced per OPU (1.0±0.1 vs. 1.3±0.2, respectively). In addition, bST treatment increased (P<0.001) the number of ovarian follicles suitable for puncture (15.3±0.5 vs. 12.1±0.4) but reduced the percentage (18.9% vs. 10.9%; P=0.009) and the number (1.4±0.2 vs. 0.8±0.1; P=0.003) of blastocysts produced per OPU session compared with the non-bST-treated buffaloes. In conclusion, the 14d interval between OPU sessions and bST treatment efficiently increased the number of ovarian follicles suitable for puncture. However, the OPU session interval had no effect on embryo production, and bST treatment reduced the in vitro blastocyst outcomes in lactating buffalo donors.
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Affiliation(s)
- M L Ferraz
- Vida Reprodutiva Consultoria S/S LTDA, Cravinhos, SP, Brazil; Department of Animal Reproduction, FMVZ-USP, São Paulo, SP, Brazil
| | - M F Sá Filho
- Department of Animal Reproduction, FMVZ-USP, São Paulo, SP, Brazil
| | - E O S Batista
- Department of Animal Reproduction, FMVZ-USP, São Paulo, SP, Brazil.
| | | | | | - A Dayan
- Vitrogen, Cravinhos, SP, Brazil
| | | | | | - L U Gimenes
- Department of Animal Reproduction, FCAV-UNESP, Jaboticabal, SP, Brazil
| | - L M Vieira
- Department of Animal Reproduction, FMVZ-USP, São Paulo, SP, Brazil
| | - P S Baruselli
- Department of Animal Reproduction, FMVZ-USP, São Paulo, SP, Brazil.
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Velazquez MA, Kues WA, Niemann H. Biomedical applications of ovarian transvaginal ultrasonography in cattle. Anim Biotechnol 2014; 25:266-93. [PMID: 24813220 DOI: 10.1080/10495398.2013.870075] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Ovarian transvaginal ultrasonography (OTU) has been used world-wide for commercial ovum pick-up programs for in vitro embryo production in elite herds, providing an excellent model for the elucidation of factors controlling bovine oocyte developmental competence. Noninvasive sampling and treatment of ovarian structures is easily accomplished with bovine OTU techniques providing a promising system for in vivo delivery of transgenes directly into the ovary. The current review summarizes existing bovine OTU models and provides prospective applications of bovine OTU to undertake research in reproductive topics of biomedical relevance, with special emphasis on the development of in vivo gene transfer strategies.
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Affiliation(s)
- Miguel A Velazquez
- a Centre for Biological Sciences , University of Southampton, Southampton General Hospital , Southampton , United Kingdom
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17
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Batista RITP, Raposo NRB, Campos-Junior PHA, Pereira MM, Camargo LSA, Carvalho BC, Gama MAS, Viana JHM. Trans-10, cis-12 conjugated linoleic acid reduces neutral lipid content and may affect cryotolerance of in vitro-produced crossbred bovine embryos. J Anim Sci Biotechnol 2014; 5:33. [PMID: 25002968 PMCID: PMC4083350 DOI: 10.1186/2049-1891-5-33] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Accepted: 05/29/2014] [Indexed: 11/23/2022] Open
Abstract
Background Due to high neutral lipids accumulation in the cytoplasm, in vitro-produced embryos from Bos primigenius indicus and their crosses are more sensitive to chilling and cryopreservation than those from Bos primigenius taurus. The objective of the present study was to evaluate the effects of trans-10, cis-12 conjugated linoleic acid (CLA) on the development and cryotolerance of crossbred Bos primigenius taurus x Bos primigenius indicus embryos produced in vitro, and cultured in the presence of fetal calf serum. Bovine zygotes (n = 1,692) were randomly assigned to one of the following treatment groups: 1) Control, zygotes cultured in Charles Rosenkrans 2 amino acid (CR2aa) medium (n = 815) or 2) CLA, zygotes cultured in CR2aa medium supplemented with 100 μmol/L of trans-10, cis-12 CLA (n = 877). Embryo development (cleavage and blastocyst rates evaluated at days 3 and 8 of culture, respectively), lipid content at morula stage (day 5) and blastocyst cryotolerance (re-expansion and hatching rates, evaluated 24 and 72 h post-thawing, respectively) were compared between groups. Additionally, selected mRNA transcripts were measured by Real–Time PCR in blastocyst stage. Results The CLA treatment had no effect on cleavage and blastocyst rates, or on mRNA levels for genes related to cellular stress and apoptosis. On the other hand, abundance of mRNA for the 1-acylglycerol-3-phosphate 0-acyltransferase-encoding gene (AGPAT), which is involved in triglycerides synthesis, and consequently neutral lipid content, were reduced by CLA treatment. A significant increase was observed in the re-expansion rate of embryos cultured with trans-10, cis-12 CLA when compared to control (56.3 vs. 34.4%, respectively, P = 0.002). However, this difference was not observed in the hatching rate (16.5 vs. 14.0%, respectively, P = 0.62). Conclusions The supplementation with trans-10, cis-12 CLA isomer in culture medium reduced the lipid content of in vitro produced bovine embryos by reducing the gene expression of 1-acylglycerol 3-phosphate 0-acyltransferase (AGPAT) enzyme. However, a possible improvement in embryo cryotolerance in response to CLA, as suggested by increased blastocyst re-expansion rate, was not confirmed by hatching rates.
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Affiliation(s)
- Ribrio Ivan Tavares Pereira Batista
- Federal University of Juiz de Fora, Juiz de Fora, MG 36036-900, Brazil ; Embrapa Dairy Cattle Research Center, Juiz de Fora, MG 36038-330, Brazil
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18
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de Souza-Fabjan JMG, Panneau B, Duffard N, Locatelli Y, de Figueiredo JR, Freitas VJDF, Mermillod P. In vitro production of small ruminant embryos: late improvements and further research. Theriogenology 2014; 81:1149-62. [PMID: 24650929 DOI: 10.1016/j.theriogenology.2014.02.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2013] [Revised: 01/28/2014] [Accepted: 02/01/2014] [Indexed: 10/25/2022]
Abstract
Beyond the potential use of in vitro production of embryos (IVP) in breeding schemes, embryos are also required for the establishment of new biotechnologies such as cloning and transgenesis. Additionally, the knowledge of oocyte and embryo physiology acquired through IVP techniques may stimulate the further development of other techniques such as marker assisted and genomic selection of preimplantation embryos, and also benefit assisted procreation in human beings. Efficient in vitro embryo production is currently a major objective for livestock industries, including small ruminants. The heterogeneity of oocytes collected from growing follicles by laparoscopic ovum pick up or in ovaries of slaughtered females, remains an enormous challenge for IVM success, and still limits the rate of embryo development. In addition, the lower quality of the IVP embryos, compared with their in vivo-derived counterparts, translates into poor cryosurvival, which restricts the wider use of this promising technology. Therefore, many studies have been reported in an attempt to determine the most suitable conditions for IVM, IVF, and in vitro development to maximize embryo production rate and quality. This review aims to present the current panorama of IVP production in small ruminants, describing important steps for its success, reporting the recent advances and also the main obstacles identified for its improvement and dissemination.
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Affiliation(s)
- Joanna Maria Gonçalves de Souza-Fabjan
- INRA, Physiologie de la Reproduction et des Comportements, Nouzilly, France; Faculty of Veterinary, Laboratory of Physiology and Control of Reproduction (LFCR), State University of Ceará, Fortaleza, Ceara, Brazil.
| | - Barbara Panneau
- INRA, Physiologie de la Reproduction et des Comportements, Nouzilly, France
| | - Nicolas Duffard
- INRA, Physiologie de la Reproduction et des Comportements, Nouzilly, France; Museum National d'Histoire Naturelle, Réserve de la Haute Touche, Obterre, France
| | - Yann Locatelli
- INRA, Physiologie de la Reproduction et des Comportements, Nouzilly, France; Museum National d'Histoire Naturelle, Réserve de la Haute Touche, Obterre, France
| | - José Ricardo de Figueiredo
- Faculty of Veterinary, Laboratory of Manipulation of Oocyte and Preantral Follicles (LAMOFOPA), State University of Ceará, Fortaleza, Ceara, Brazil
| | | | - Pascal Mermillod
- INRA, Physiologie de la Reproduction et des Comportements, Nouzilly, France
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Exposing bovine cumulus–oocyte complexes to aromatizable androgen restore serum-induced low estradiol production in vitro. ZYGOTE 2013; 22:496-9. [DOI: 10.1017/s0967199413000312] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
SummaryWe aimed in this study to assess whether serum-decreased bovine cumulus–oocyte complex (COC) steroidogenesis during in vitro maturation (IVM) is caused by deficient androgen milieu. For this approach, bovine COCs were cultured in serum-supplemented IVM medium in the presence or absence of 1 μM androstenedione. After 24 h of culture, medium was collected and analyzed for its content of estradiol-17β (E2) and progesterone (P4). Medium E2 content markedly increased after incubation of COCs with androstenedione (17.52 ± 1.86 ng/ml to the androgen group; 0.32 ± 0.05 ng/ml to the non-androgen group). No significant difference in the P4 content was detected despite the presence of androstenedione (21.83 ± 1.61 ng/ml to the androgen group; 21.73 ± 1.67 ng/ml to the non-androgen group). Our data provide compelling evidence that bovine COCs steroidogenesis remains functional during culture in serum-supplemented medium and suggest that serum-induced decreased COCs estradiol secretion is caused by deficiency of an aromatizable androgen source.
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Chasombat J, Nagai T, Parnpai R, Vongpralub T. Ovarian Follicular Dynamics, Ovarian Follicular Growth, Oocyte Yield, In vitro Embryo Production and Repeated Oocyte Pick Up in Thai Native Heifers Undergoing Superstimulation. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2013; 26:488-500. [PMID: 25049814 PMCID: PMC4093380 DOI: 10.5713/ajas.2012.12519] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2012] [Revised: 01/09/2013] [Accepted: 12/26/2012] [Indexed: 11/27/2022]
Abstract
The objective of this study was to compare the effectiveness of the protocols for superstimulation of follicular growth in Thai native heifers. Heifers (n = 20) were randomly divided into four groups of five heifers/group. Heifers were given a single dose by i.m. administration of 100 mg Follicle Stimulating Hormone dissolved in polyvinylpyrrolidone (FSHp) at 24 h. Ovum pick up (OPU) occurred at 72 h (F24O72 protocol; Group 1) or 96 h (F24O96 protocol; Group 2), and at 36 h and OPU at 72 h (F36O72 protocol; Group 3) or 96 h (F36O96 protocol; Group 4) after follicular ablation. The dynamics of ovarian follicular growth were monitored by twice-daily ultrasonographic examinations. Blood sample collections were performed every 12 h after initiation of treatment for assessment of FSH, E2 and P4 profiles. All heifers were subjected to eight repeated sequential sessions of OPU. The follicular deviation commenced 24±5.32 h after follicular ablation in all groups. The circulatory FSH surged quickly from 24 to 36 h (>0.8 ng/ml) after follicular ablation and circulatory estrogen levels steadily increased from 36 h until OPU in all groups. At the end of the OPU sessions, the mean number of aspirated follicles/heifer/session in F36O72 protocol (Group 3) and F36O96 protocol (Group 4) were higher than in the two other groups (p<0.05). The number of cumulus-oocyte complexes (COCs), cleaved and day 8 blastocysts rates in the F36O72 protocol (Group 3) were higher than in the other groups (p<0.05). It can be concluded that a single dose i.m. administration of 100 mg FSHp at 36 h and OPU at 72 h after follicular ablation (F36O72 protocol; Group 3) was the most effective protocol for superstimulation of follicular growth for repeated OPU and subsequent in vitro embryo production in Thai native heifers.
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Affiliation(s)
- J. Chasombat
- Department of Animal Science, Faculty of Agriculture, Khon Kaen University, Khon Kaen 40002,
Thailand
| | | | | | - T. Vongpralub
- Department of Animal Science, Faculty of Agriculture, Khon Kaen University, Khon Kaen 40002,
Thailand
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Viana J, Dorea M, Siqueira L, Arashiro E, Camargo L, Fernandes C, Palhão M. Occurrence and characteristics of residual follicles formed after transvaginal ultrasound-guided follicle aspiration in cattle. Theriogenology 2013; 79:267-73. [DOI: 10.1016/j.theriogenology.2012.08.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2012] [Revised: 08/16/2012] [Accepted: 08/17/2012] [Indexed: 10/27/2022]
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Wohlres-Viana S, Pereira MM, Viana JHM, Machado MA, de Almeida Camargo LS. Comparison of gene expression in Bos indicus and Bos taurus embryos produced in vivo or in vitro. Livest Sci 2011. [DOI: 10.1016/j.livsci.2011.02.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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23
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Pereira M, Costa F, Oliveira A, Serapião R, Machado M, Viana JM, Camargo L. Quantificação de transcritos maternos em oócitos bovinos submetidos a diferentes condições de maturação. ARQ BRAS MED VET ZOO 2010. [DOI: 10.1590/s0102-09352010000600015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Comparou-se a quantidade relativa de transcritos de origem materna entre oócitos bovinos maturados in vivo e maturados em diferentes condições in vitro. Avaliou-se também o efeito dos sistemas de maturação in vitro sobre a viabilidade das células do cumulus. Para a maturação in vivo, os oócitos foram coletados 19-20h após aplicação de gonadorelina em doadoras superestimuladas com FSH e sincronizadas com implante de progesterona. Para a maturação in vitro, oócitos imaturos, obtidos de ovários coletados em matadouro, foram maturados sob diferentes tensões de oxigênio e suplementação proteica. Avaliou-se a abundância dos transcritos de Zar1, MATER e GDF9 por PCR em tempo real. A viabilidade das células do cumulus de oócitos maturados in vitro foi analisada pela coloração de Azul de Tripan. Observou-se sub-regulação (P<0,05) dos transcritos em oócitos submetidos às diferentes condições de maturação in vitro em relação aos maturados in vivo. Não houve diferença (P>0,05) na viabilidade das células do cumulus. Conclui-se que o sistema de maturação influencia a quantidade de transcritos de origem materna armazenados no citoplasma de oócitos bovinos
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Affiliation(s)
- M.M Pereira
- Embrapa Gado de Leite; Universidade Federal de Juiz de Fora
| | | | | | | | - M.A Machado
- Embrapa Gado de Leite; Universidade Federal de Juiz de Fora
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Pontes J, Silva K, Basso A, Rigo A, Ferreira C, Santos G, Sanches B, Porcionato J, Vieira P, Faifer F, Sterza F, Schenk J, Seneda M. Large-scale in vitro embryo production and pregnancy rates from Bos taurus, Bos indicus, and indicus-taurus dairy cows using sexed sperm. Theriogenology 2010; 74:1349-55. [DOI: 10.1016/j.theriogenology.2010.06.004] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2008] [Revised: 05/22/2010] [Accepted: 06/02/2010] [Indexed: 10/19/2022]
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Gestation length, birth weight and offspring gender ratio of in vitro-produced Gyr (Bos indicus) cattle embryos. Anim Reprod Sci 2010; 120:10-5. [DOI: 10.1016/j.anireprosci.2010.02.013] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2009] [Revised: 02/06/2010] [Accepted: 02/16/2010] [Indexed: 11/17/2022]
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26
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Ovarian follicular dynamics, follicle deviation, and oocyte yield in Gyr breed (Bos indicus) cows undergoing repeated ovum pick-up. Theriogenology 2010; 73:966-72. [DOI: 10.1016/j.theriogenology.2009.11.025] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2009] [Revised: 10/29/2009] [Accepted: 11/19/2009] [Indexed: 10/20/2022]
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Pereira MM, Machado MA, Costa FQ, Serapiao RV, Viana JHM, Camargo LSA. Effect of oxygen tension and serum during IVM on developmental competence of bovine oocytes. Reprod Fertil Dev 2010; 22:1074-82. [DOI: 10.1071/rd10007] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2010] [Accepted: 02/10/2010] [Indexed: 11/23/2022] Open
Abstract
With an aim to improve the in vitro production of bovine embryos, the present study investigated the effect of serum and oxygen tension during IVM on oocyte developmental competence. Four experimental groups were evaluated: G1, 10% oestrus cow serum (OCS) with 20% O2; G2, 0.1% polyvinyl alcohol (PVA) with 20% O2; G3, 10% OCS with 5% O2; and G4, 0.1% PVA with 5% O2. The proportion of MII oocytes, blastocyst rates and total cell number were not affected (P > 0.05) when the OCS was replaced with PVA under 5% O2, whereas a higher (P < 0.05) blastocyst rate and total cell number were found with OCS compared with PVA under 20% O2. The apoptosis index was lower in blastocysts from oocytes matured with PVA under 5% O2 (G4) compared with other groups (G1, G2 and G3), but no differences (P > 0.05) were found in maturation and blastocyst rates. Significant differences were found in the amount of specific transcripts in oocytes matured under different conditions. In conclusion maturation with PVA and 5% O2 provides an efficient in vitro culture condition for the maturation of bovine oocytes.
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Developmental competence and expression of the MATER and ZAR1 genes in immature bovine oocytes selected by brilliant cresyl blue. ZYGOTE 2009; 18:209-16. [PMID: 19939331 DOI: 10.1017/s0967199409990219] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The objective of this work was to evaluate the selection of immature bovine oocytes by brilliant cresyl blue dye (BCB) and expression of transcripts MATER and ZAR1. Cumulus-oocyte complexes (COCs) from slaughterhouse ovaries were exposed to BCB diluted in mDPBS and incubated for 60 min at 38.5 degrees C in humidified air. After exposure those COCs were distributed in two groups, according to their cytoplasm colour: BCB+ (coloured cytoplasm) or BCB- (colourless cytoplasm). The control group was submitted to in vitro maturation (IVM) immediately after morphological selection and holding control group COCs were exposed to mDPBS without BCB but in the same incubation conditions of BCB+ and BCB- group. The COCs of all groups were submitted to IVM, in vitro fertilization (IVF) and in vitro culture (IVC). Cleavage rate (72 h post-insemination) was similar between control (65.3%) and BCB+ (64.4%) groups, but greater than (p < 0.05) holding control (49.8%) and BCB- (51.3%) groups. Blastocyst rate (192 h post-insemination) was not different between BCB+ (18.5%) and control (16.3%) groups, but greater (p < 0.05) than BCB- (8.4%) group. No difference was found for blastocyst rate between holding control group (14.2%), control and BCB+ groups. The relative expression of MATER and ZAR1 genes was evaluated by real-time PCR in immature oocytes collected from the control, holding control, BCB+ and BCB- groups. Despite the relative expression of MATER in holding control, BCB+ and BCB- were down regulated in comparison to control group there was no statistical difference (p > 0.05) in the relative expression of MATER and ZAR1 transcripts among groups. The results indicate that the BCB dye detects immature oocyte populations with different developmental competence, although no improvement in in vitro embryo production using oocytes exposed or not to BCB was observed. Development competence of immature oocytes exposed to BCB does not seem to be associated with variations in the expression of MATER and ZAR1 transcripts.
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Interrelationships among morphology, echotexture, and function of the bovine corpus luteum during the estrous cycle. Anim Reprod Sci 2009; 115:18-28. [DOI: 10.1016/j.anireprosci.2008.11.009] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2008] [Revised: 10/17/2008] [Accepted: 11/13/2008] [Indexed: 11/21/2022]
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Siqueira LGB, Torres CAA, Souza ED, Monteiro PLJ, Arashiro EKN, Camargo LSA, Fernandes CAC, Viana JHM. Pregnancy rates and corpus luteum-related factors affecting pregnancy establishment in bovine recipients synchronized for fixed-time embryo transfer. Theriogenology 2009; 72:949-58. [PMID: 19709722 DOI: 10.1016/j.theriogenology.2009.06.013] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2008] [Revised: 05/01/2009] [Accepted: 06/18/2009] [Indexed: 11/30/2022]
Abstract
The objective was to investigate the influence of corpora lutea physical and functional characteristics on pregnancy rates in bovine recipients synchronized for fixed-time embryo transfer (FTET). Crossbred (Bos taurus taurus x Bos taurus indicus) nonlactating cows and heifers (n=259) were treated with the following protocol: 2mg estradiol benzoate (EB) plus an intravaginal progesterone device (CIDR 1.9g progesterone; Day 0); 400 IU equine chorionic gonadotropin (eCG; Day 5); prostaglandin F(2alpha) (PGF(2alpha)) and CIDR withdrawal (Day 8); and 1mg EB (Day 9). Ovarian ultrasonography and blood sample collections were performed on Day 17. Of the 259 cattle initially treated, 197 (76.1%) were suitable recipients; they received a single, fresh, quality grade 1 or 2 in vivo-derived (n=90) or in vitro-produced (n=87) embryo on Day 17. Pregnancy rates (23 d after embryo transfer) were higher for in vivo-derived embryos than for in vitro-produced embryos (58.8% vs. 31.0%, respectively; P<0.001). Mean (+/-SD) plasma progesterone (P(4)) concentration was higher in cattle that became pregnant than that in nonpregnant cattle (5.2+/-5.0 vs. 3.8+/-2.4 ng/mL; P=0.02). Mean pixel values (71.8+/-1.3 vs. 71.2+/-1.1) and pixel heterogeneity (14.8+/-0.3 vs. 14.5+/-0.5) were similar between pregnant and nonpregnant recipients (P>0.10). No significant relationship was detected between pregnancy outcome and plasma P(4), corpus luteum area, or corpus luteum echotexture. Embryo type, however, affected the odds of pregnancy. In conclusion, corpus luteum-related traits were poor predictors of pregnancy in recipients. The type of embryo, however, was a major factor affecting pregnancy outcome.
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Affiliation(s)
- L G B Siqueira
- Federal University of Viçosa, Av. P.H. Rolfs s/n, Viçosa, Minas Gerais, Brazil.
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McEvoy TG, Alink FM, Moreira VC, Watt RG, Powell KA. Embryo technologies and animal health – consequences for the animal following ovum pick-up, in vitro embryo production and somatic cell nuclear transfer. Theriogenology 2006; 65:926-42. [PMID: 16280157 DOI: 10.1016/j.theriogenology.2005.09.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Mammalian reproductive technologies that aim either to complement or to transcend conventional livestock breeding options have contributed to some of the most remarkable achievements in the field of reproductive biology in recent decades. In so doing they have extended our horizons in two distinct dimensions, the first concerning what it is technically possible to achieve and the second relating to the time-frame within which an individual's life-long developmental capability is initially established and ultimately realized or undermined. Our impressions of the benefits and values, or otherwise, of technologies such as in vitro embryo production and nuclear transfer are rightly influenced by the extent to which they impinge on the health of animals either subjected to or derived from them. Here, we consider some of the health implications of oocyte/embryo-centric technologies applied to farm livestock.
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Affiliation(s)
- T G McEvoy
- Scottish Agricultural College, Ferguson Building, Sustainable Livestock Systems Group, Craibstone Estate, Bucksburn, Aberdeen, Scotland, UK.
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