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Tavares WCM, Maretto V, Silveira V, Pinto VB, Bustamante-Filho IC, Quirino CR, Ortiz Vega WH, Caldas-Bussiere MC. Impact of the near-physiological temperature on the in vitro maturation of bovine oocytes: A comparative proteomic approach. Theriogenology 2024; 228:64-74. [PMID: 39098122 DOI: 10.1016/j.theriogenology.2024.07.026] [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: 05/30/2024] [Revised: 07/09/2024] [Accepted: 07/29/2024] [Indexed: 08/06/2024]
Abstract
In vivo, the temperature inside preovulatory follicles of cows is approximately 1 °C lower than rectal temperature. However, standard bovine oocyte in vitro maturation (IVM) protocols use 38.5 °C based on rectal temperature. This study evaluated the effect of reducing IVM temperature to 37.5 °C on the proteomic profile of oocytes compared to the routine 38.5 °C. Nuclear maturation rate and cumulus cell (CC) expansion (30 COCs per group, 21 replicates) were assessed by observing the first polar body and using a subjective scoring method (0-4). Total nitrite concentrations in the culture medium were measured using the Griess method. Differential proteomics was performed using LC-MS/MS on pooled oocyte samples (500 matured oocytes per group, three replicates), followed by gene ontology enrichment, protein-protein interaction, and putative miRNA target analyses. No significant differences were observed between the groups in nuclear maturation, CC expansion, or nitrite concentration (P > 0.05). A total of 806 proteins were identified, with 7 up-regulated and 12 down-regulated in the treatment group compared to the control. Additionally, 12 proteins were unique to the control group, and 8 were unique to the treatment group. IVM at 37.5 °C resulted in the upregulation of proteins involved in protein folding and GTP binding, and the downregulation of enzymes with oxidoreductase activity and proteins involved in cytoskeletal fiber formation. Furthermore, 43 bovine miRNAs potentially regulating these genes (DES, HMOX2, KRT75, FARSA, IDH2, CARHSP1) were identified. We conclude that IVM of bovine oocytes at 37.5 °C induces significant proteomic changes without impacting nuclear maturation, cumulus cell expansion, or nitrite concentration in the IVM medium.
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Affiliation(s)
- Winny Caldas Moreno Tavares
- Laboratory of Animal Reproduction and Breeding, State University of Norte Fluminense 'Darcy Ribeiro' (Universidade Estadual do Norte Fluminense Darcy Ribeiro - UENF), Avenida Alberto Lamego, 2000, Parque Califórnia, Campos dos Goytacazes, Rio de Janeiro, RJ, 28013-602, Brazil
| | - Vinicius Maretto
- Laboratory of Animal Reproduction and Breeding, State University of Norte Fluminense 'Darcy Ribeiro' (Universidade Estadual do Norte Fluminense Darcy Ribeiro - UENF), Avenida Alberto Lamego, 2000, Parque Califórnia, Campos dos Goytacazes, Rio de Janeiro, RJ, 28013-602, Brazil
| | - Vanildo Silveira
- Laboratório de Biotecnologia, Centro de Biociências e Biotecnologia (CBB), Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF), Av. Alberto Lamego 2000, Campos dos Goytacazes, RJ, 28013-602, Brazil; Unidade de Biologia Integrativa, Setor de Genômica e Proteômica, UENF, Campos dos Goytacazes, RJ, Brazil
| | - Vitor Batista Pinto
- Laboratório de Biotecnologia, Centro de Biociências e Biotecnologia (CBB), Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF), Av. Alberto Lamego 2000, Campos dos Goytacazes, RJ, 28013-602, Brazil; Unidade de Biologia Integrativa, Setor de Genômica e Proteômica, UENF, Campos dos Goytacazes, RJ, Brazil
| | - Ivan Cunha Bustamante-Filho
- Laboratório de Biotecnologia da Reprodução Animal, Universidade do Vale do Taquari - Univates, Rua Avelino Tallini, 171, Lajeado, RS, 95914-014, Brazil
| | - Celia Raquel Quirino
- Laboratory of Animal Reproduction and Breeding, State University of Norte Fluminense 'Darcy Ribeiro' (Universidade Estadual do Norte Fluminense Darcy Ribeiro - UENF), Avenida Alberto Lamego, 2000, Parque Califórnia, Campos dos Goytacazes, Rio de Janeiro, RJ, 28013-602, Brazil
| | - Wilder Hernando Ortiz Vega
- Laboratory of Animal Reproduction and Breeding, State University of Norte Fluminense 'Darcy Ribeiro' (Universidade Estadual do Norte Fluminense Darcy Ribeiro - UENF), Avenida Alberto Lamego, 2000, Parque Califórnia, Campos dos Goytacazes, Rio de Janeiro, RJ, 28013-602, Brazil
| | - Maria Clara Caldas-Bussiere
- Laboratory of Animal Reproduction and Breeding, State University of Norte Fluminense 'Darcy Ribeiro' (Universidade Estadual do Norte Fluminense Darcy Ribeiro - UENF), Avenida Alberto Lamego, 2000, Parque Califórnia, Campos dos Goytacazes, Rio de Janeiro, RJ, 28013-602, Brazil.
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Keane JA, Ealy AD. An Overview of Reactive Oxygen Species Damage Occurring during In Vitro Bovine Oocyte and Embryo Development and the Efficacy of Antioxidant Use to Limit These Adverse Effects. Animals (Basel) 2024; 14:330. [PMID: 38275789 PMCID: PMC10812430 DOI: 10.3390/ani14020330] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2023] [Revised: 01/10/2024] [Accepted: 01/18/2024] [Indexed: 01/27/2024] Open
Abstract
The in vitro production (IVP) of bovine embryos has gained popularity worldwide and in recent years and its use for producing embryos from genetically elite heifers and cows has surpassed the use of conventional superovulation-based embryo production schemes. There are, however, several issues with the IVP of embryos that remain unresolved. One limitation of special concern is the low efficiency of the IVP of embryos. Exposure to reactive oxygen species (ROS) is one reason why the production of embryos with IVP is diminished. These highly reactive molecules are generated in small amounts through normal cellular metabolism, but their abundances increase in embryo culture because of oocyte and embryo exposure to temperature fluctuations, light exposure, pH changes, atmospheric oxygen tension, suboptimal culture media formulations, and cryopreservation. When uncontrolled, ROS produce detrimental effects on the structure and function of genomic and mitochondrial DNA, alter DNA methylation, increase lipid membrane damage, and modify protein activity. Several intrinsic enzymatic pathways control ROS abundance and damage, and antioxidants react with and reduce the reactive potential of ROS. This review will focus on exploring the efficiency of supplementing several of these antioxidant molecules on oocyte maturation, sperm viability, fertilization, and embryo culture.
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Affiliation(s)
| | - Alan D. Ealy
- School of Animal Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 24060, USA;
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Rosas IM, Anagnostopoulou C, Singh N, Gugnani N, Singh K, Desai D, Darbandi M, Manoharan M, Darbandi S, Chockalingam A, Leonardi Diaz SI, Gupta S, Kuroda S, Finelli R, Sallam HN, Wirka KA, Boitrelle F, Agarwal A. Optimizing embryological aspects of oocyte retrieval, oocyte denudation, and embryo loading for transfer: a state of the art review. Panminerva Med 2022; 64:156-170. [PMID: 35146991 DOI: 10.23736/s0031-0808.22.04675-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Oocyte retrieval, oocyte denudation, and embryo transfer are crucial processes during assisted reproduction (ART). Air quality in the ART laboratory, temperature, pH of the media used and the time interval between oocyte retrieval and insemination are all critical factors. Anesthesia is required for oocyte retrieval, however evidence regarding the potential impact of different methods (general anesthesia, conscious sedation, and local anesthesia) on the clinical outcomes is unclear. The optimal timing of oocyte denudation following retrieval has not been established. Regarding the mechanical denudation process, there is a lack of evidence to demonstrate the safest minimum inner diameter of denuding pipettes used to complete the removal of granulosa cells surrounding the oocytes. During embryo transfer, many clinics worldwide flush the catheter before embryo loading, in an attempt to potentially rinse off any toxic agents; however, there is insufficient evidence to show that flushing the embryo transfer catheter before loading increases the success of ART outcome. Considering the serious gaps in knowledge in ART practice, the aim of this review is to provide an updated overview of the current knowledge regarding the various steps and techniques involved in oocyte retrieval, oocyte denudation, and embryo loading for transfer.
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Affiliation(s)
- Israel M Rosas
- Citmer Reproductive Medicine, IVF LAB, Mexico City, Mexico
| | | | | | - Nivita Gugnani
- BabySoon Fertility and IVF Center, India Institute of Medical Sciences, New Delhi, India
| | - Keerti Singh
- Faculty of Medical Sciences, The University of the West Indies, Cave Hill Campus, Barbados
| | - Dimple Desai
- DPU IVF & ENDOSCOPY CENTER, Dr. D. Y. Patil Hospital & Research Centre, Pune, India
| | - Masha Darbandi
- Fetal Health Research Center, Hope Generation Foundation, Tehran, Iran.,Gene Therapy and Regenerative Medicine Research Center, Hope Generation Foundation, Tehran, Iran
| | | | - Sara Darbandi
- Fetal Health Research Center, Hope Generation Foundation, Tehran, Iran.,Gene Therapy and Regenerative Medicine Research Center, Hope Generation Foundation, Tehran, Iran
| | | | | | - Sajal Gupta
- American Center for Reproductive Medicine, Cleveland, OH, USA
| | | | - Renata Finelli
- American Center for Reproductive Medicine, Cleveland, OH, USA
| | - Hassan N Sallam
- Department of Obstetrics and Gynaecology, Alexandria University Faculty of Medicine, Alexandria, Egypt
| | - Kelly A Wirka
- Fertility & Endocrinology, Medical Affairs, EMD Serono, USA
| | - Florence Boitrelle
- Reproductive Biology, Fertility Preservation, Andrology, CECOS, Poissy Hospital, Poissy, France.,Department of Biology, Reproduction, Epigenetics, Environment and Development, Paris Saclay University, UVSQ, INRAE, BREED, Jouy-en-Josas, France
| | - Ashok Agarwal
- American Center for Reproductive Medicine, Cleveland, OH, USA -
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Duarte-da-Fonseca Dias S, Palmeira-de-Oliveira A, Rolo J, Gomes-Ruivo P, Hélio Oliani A, Palmeira-de-Oliveira R, Martinez-de-Oliveira J, Pinto-de-Andrade L. Parameters influencing the maturation of bovine oocyte: a review. ANIMAL PRODUCTION SCIENCE 2022. [DOI: 10.1071/an21380] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Şen U, Kuran M. Low incubation temperature successfully supports the in vitro bovine oocyte maturation and subsequent development of embryos. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2017; 31:827-834. [PMID: 29268582 PMCID: PMC5933980 DOI: 10.5713/ajas.17.0569] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 11/19/2017] [Accepted: 11/23/2017] [Indexed: 11/27/2022]
Abstract
OBJECTIVE The aim of this study was to compare the effects of 36.5°C and 38.5°C incubation temperatures on the maturation of bovine oocytes and developmental competence of embryos. METHODS In experiment 1, oocytes were maturated in bicarbonate-buffered TCM-199 for 22 hours in a humidified atmosphere of 5% CO2 in the air at either 36.5°C or 38.5°C and nuclear maturation status were determined. In experiment 2, in vitro fertilized oocytes were allocated randomly into synthetic oviductal fluid medium with or without a mixture of 1 mM L-glutathione reduced and 1,500 IU superoxide dismutase and cultured in a humidified atmosphere of 5% CO2, 5% O2, and 90% N2 in the air at 38.5°C for 8 days. RESULTS There were no significant differences between incubation temperatures in terms of oocyte maturation parameters such as cumulus expansion, first polar body extrusion and nuclear maturation. Incubation temperatures during in vitro maturation had no effects on developmental competence of embryos, but supplementation of antioxidants increased (p< 0.05) developmental competence of the embryos. Blastocysts from oocytes matured at 38.5°C had comparatively higher inner cell mass, but low overall and trophectoderm cell numbers (p<0.05). CONCLUSION The results of present study showed that maturation of bovine oocytes at 36.5°C may provide a suitable thermal environment for nuclear maturation and subsequent embryo development.
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Affiliation(s)
- Uğur Şen
- Department of Agricultural Biotechnology, Faculty of Agriculture, Ondokuz Mayis University, Samsun TR55139, Turkey
| | - Mehmet Kuran
- Department of Agricultural Biotechnology, Faculty of Agriculture, Ondokuz Mayis University, Samsun TR55139, Turkey
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Meng F, Li H, Wang X, Qin G, Oback B, Shi D. Optimized production of transgenic buffalo embryos and offspring by cytoplasmic zygote injection. J Anim Sci Biotechnol 2015; 6:44. [PMID: 26500768 PMCID: PMC4617447 DOI: 10.1186/s40104-015-0044-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Accepted: 09/29/2015] [Indexed: 12/05/2022] Open
Abstract
Background Cytoplasmic injection of exogenous DNA into zygotes is a promising technique to generate transgenic livestock. However, it is still relatively inefficient and has not yet been demonstrated to work in buffalo. We sought to improve two key technical parameters of the procedure, namely i) how much linear DNA to inject and ii) when to inject it. For this, we introduced a constitutively expressed enhanced green fluorescent protein (EGFP) plasmid into buffalo zygotes. Results First, we found that the proportion of EGFP-expressing blastocysts derived from zygotes injected with 20 or 50 ng/μL DNA was significantly higher than from those injected with 5 μg/mL. However, 50 ng/μL exogenous DNA compromised blastocyst development compared to non-injected IVF controls. Therefore the highest net yield of EGFP-positive blastocysts was achieved at 20 ng/μL DNA. Second, zygotes injected early (7–8 h post-insemination [hpi]) developed better than those injected at mid (12–13 hpi) or late (18–19 hpi) time points. Blastocysts derived from early injections were also more frequently EGFP-positive. As a consequence, the net yield of EGFP-expressing blastocysts was more than doubled using early vs late injections (16.4 % vs 7.7 %). With respect to blastocyst quality, we found no significant difference in cell numbers of EGFP-positive blastocysts vs non-injected blastocysts. Following embryo transfer of six EGFP-positive blastocysts into four recipient animals, two viable buffalo calves were born. Biopsied ear tissues from both buffalo calves were analyzed for transgene presence and expression by Southern blot, PCR and confocal laser scanning microscopy, respectively. This confirmed that both calves were transgenic. Conclusions Our cytoplasmic injection protocol improved generation of transgenic embryos and resulted in the first transgenic buffalo calves produced by this method.
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Affiliation(s)
- Fanli Meng
- Animal Reproduction Institute, State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, 75 Xiuling Road, Nanning, 530005 P.R China ; Present address: AgResearch Ltd., Ruakura Research Centre, Reproductive Technologies, 10 Bisley Road, Private Bag 3123, Hamilton, New Zealand
| | - Hui Li
- Animal Reproduction Institute, State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, 75 Xiuling Road, Nanning, 530005 P.R China
| | - Xiaoli Wang
- Animal Reproduction Institute, State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, 75 Xiuling Road, Nanning, 530005 P.R China
| | - Guangsheng Qin
- Animal Reproduction Institute, State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, 75 Xiuling Road, Nanning, 530005 P.R China
| | - Björn Oback
- Present address: AgResearch Ltd., Ruakura Research Centre, Reproductive Technologies, 10 Bisley Road, Private Bag 3123, Hamilton, New Zealand
| | - Deshun Shi
- Animal Reproduction Institute, State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, 75 Xiuling Road, Nanning, 530005 P.R China
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Improving in vitro maturation and pregnancy outcome in cattle using a novel oocyte shipping and maturation system not requiring a CO2 gas phase. Theriogenology 2015; 84:109-17. [DOI: 10.1016/j.theriogenology.2015.02.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Revised: 02/18/2015] [Accepted: 02/22/2015] [Indexed: 11/21/2022]
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8
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El-Sheikh Ali H, Kitahara G, Tamura Y, Kobayashi I, Hemmi K, Torisu S, Sameshima H, Horii Y, Zaabel S, Kamimura S. Presence of a temperature gradient among genital tract portions and the thermal changes within these portions over the estrous cycle in beef cows. J Reprod Dev 2012; 59:59-65. [PMID: 23095515 PMCID: PMC3943236 DOI: 10.1262/jrd.2012-017] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The aim of the present study was to describe the temperature of the different portions of the female genital tract and their relation to rectal temperature and to investigate the effect of steroid hormones profiles on these variables over the estrous cycle in cattle. Four nonpregnant Japanese Black cows were investigated daily over two successive estrous cycles using a digital thermometer with a long probe and rounded-end sensor to record the temperature of the rectum (RT), vagina (VT), cervix (CT), uterine body (UBT) and uterine horns (UHT). Blood samples were collected immediately before temperature recording to assay peripheral levels of progesterone (P(4)) and estradiol-17β (E(2)). Moreover, transrectal ultrasonography was carried out after temperature recording to monitor the ovulatory follicle and track ovulation. During the experiment, the ambient temperature and relative humidity were recorded for further calculation of the temperature humidity index (THI). The temperature within the genital tracts in these cows progressively increased towards the uterine horns from the vagina. The VT, CT, UBT and UHTs were significantly higher in association with peripheral P(4) concentrations greater than 4 ng/ml (mid-luteal phase) when compared with lower peripheral P(4) concentrations. The VT was more significantly (P<0.01) correlated to the CT, UBT and UHTs than RT. In conclusion, a temperature gradient was present among the vagina, cervix and uterus over the estrous cycle, and changes in peripheral P(4) concentrations were associated with the thermal variations within these portions. The VT could be more beneficial than RT in monitoring temperature of deeper portions of the female genital tract in bovine.
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Affiliation(s)
- Hossam El-Sheikh Ali
- Laboratory of Theriogenology, Faculty of Agriculture, University of Miyazaki, Miyazaki 889-2192, Japan
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9
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Hunter R. Temperature gradients in female reproductive tissues. Reprod Biomed Online 2012; 24:377-80. [DOI: 10.1016/j.rbmo.2011.12.007] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2011] [Revised: 12/22/2011] [Accepted: 12/22/2011] [Indexed: 12/11/2022]
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10
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Somfai T, Imai K, Kaneda M, Akagi S, Watanabe S, Haraguchi S, Mizutani E, Dang-Nguyen TQ, Inaba Y, Geshi M, Nagai T. The effect of ovary storage and in vitro maturation on mRNA levels in bovine oocytes; a possible impact of maternal ATP1A1 on blastocyst development in slaughterhouse-derived oocytes. J Reprod Dev 2011; 57:723-30. [PMID: 21959748 DOI: 10.1262/jrd.11-020h] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Since BSE testing of slaughtered cattle is obligatory in Japan, storage of ovaries at 15-20 C overnight in phosphate buffered saline has become a routine protocol in in vitro production (IVP) of cattle embryos. Ovary storage is known to reduce developmental competence of oocytes; however, its effects on oocyte gene expression have not been clarified yet. This study compared oocytes collected from stored slaughterhouse-derived ovaries with those collected by Ovum Pick-Up (OPU) in terms of the expression of 20 selected genes to determine if ovary storage affects cellular processes at the molecular level. Expression of mRNA in oocytes was assayed before and after in vitro maturation (IVM) by real-time quantitative PCR. Maternal mRNA levels of genes were investigated in 2-cell stage embryos obtained from slaughterhouse oocytes to assess their roles for blastocyst formation. In immature OPU oocytes, genes related to metabolism (GAPDH), transporters (GLUT8, ATP1A1) and stress resistance protein (HSP70) showed significantly higher expression compared with oocytes derived from stored ovaries. During IVM, the expression of GDF9, GLUT8, CTNNB1 and PMSB1 was significantly decreased irrespective of oocyte source. Two-cell stage embryos cleaving at 22-25 h after in vitro fertilization (IVF) showed a significantly higher blastocyst formation rate and ATP1A1 gene expression level compared with those cleaving at 27-30 h after IVF. Our results reveal that storage of ovaries alters mRNA levels in oocytes. Correlation of Na/K ATPase ATP1A1 expression in IVP embryos at the 2-cell and 8-cell stages with their developmental ability to the blastocyst stage may suggest the importance of maternal mRNA of this gene during blastulation in embryos derived from slaughterhouse oocytes.
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Affiliation(s)
- Tamás Somfai
- National Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization, Ibaraki 305-0901, Japan. jp
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Silva L, Reis A, Silva A, Sousa J, Souza A, Vale W. Transporte de oócitos bovinos em meio de maturação por diferentes períodos de tempo sem controle da atmosfera gasosa. ARQ BRAS MED VET ZOO 2011. [DOI: 10.1590/s0102-09352011000100012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Avaliou-se a viabilidade do transporte de oócitos em meio quimicamente definido, e analisou-se a necessidade da adição ou não de hormônios neste meio. Os oócitos do grupo-controle (0h) foram maturados por 24h em estufa de CO2, e os dos grupos experimentais foram transportados em incubadora portátil. No experimento I, as taxas de clivagem foram similares (P>0,05) para os grupos 0h (59,7%), 3h (53,5%) e 9h (48,8%), e houve redução nos grupos 6h (46,1%) e 12h (43,8%). Essas taxas foram semelhantes entre os grupos 3h, 6h, 9h e 12h. A produção de blastocistos não foi diferente (P>0,05) para os grupos 0h (38,0%), 3h (32,3%), 6h (27,3%) e 9h (24,8%), e houve redução no grupo 12h (18,9%). Essas taxas foram semelhantes entre os grupos 6h, 9h e 12h. No experimento II, não houve diferença (P>0,05) entre as taxas de clivagem para os grupos 0h (71,4%), 3h (70,3%), 6h (56,0%) com hormônios, e os grupos 3h (64,8%) e 6h (54,1%) sem hormônios. A produção de blastocistos foi similar (P>0,05) para os grupos 0h (46,1%), 3h com hormônios (45,8%) e 3h sem hormônios (41,1%), porém houve redução nos grupos 6h com hormônios (35,5%) e 6h sem hormônios (33,5%). Essas taxas foram semelhantes entre os grupos 3h sem hormônios e 6h com e sem hormônios. Estes resultados indicam que é possível otransporte de oócitos bovinos por um período de até nove horas, e que a adição de hormônios neste meio não influencia os índices de clivagem e de blastocistos
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Boone WR, Higdon HL, Johnson JE. Quality Management Issues in the Assisted Reproduction Laboratory. ACTA ACUST UNITED AC 2010. [DOI: 10.1177/205891581000100103] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
In the United States, the Clinical Laboratory Improvement Act (CLIA) of 1988 describes requirements and guidelines for implementing a quality control/quality assurance (QC/QA) program for moderate and high complexity laboratories. These requirements and guidelines apply to Assisted Reproductive Technology (ART) laboratories as well. The general topic of QC and QA as it pertains to in vitro fertilization (IVF) and embryo transfer (ET) is extensively reviewed. This review summarizes many of the QC and QA events that contribute to the advancement of knowledge in this biotechnological field. These events include control of the culture environment inside and outside of the incubator, as well as factors that affect culture media. This review also discusses, in considerable detail, the QC and the QA that pertain to equipment used within the laboratory and how to control for potential contaminants, which reside within the laboratory. This review provides evidence to indicate the need for laboratory personnel to monitor quality improvement issues on a continuous basis. Personnel must be willing to change as improvements in technology occur in order to meet the ever-evolving demands of a more difficult patient population. Suggestions for meeting these demands are offered.
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Affiliation(s)
- William R. Boone
- Greenville Hospital System University Medical Center, Greenville, South Carolina Department of Obstetrics and Gynecology
| | - H. Lee Higdon
- Greenville Hospital System University Medical Center, Greenville, South Carolina Department of Obstetrics and Gynecology
| | - Jane E. Johnson
- Greenville Hospital System University Medical Center, Greenville, South Carolina Department of Obstetrics and Gynecology
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Ludwig T, A Thomson J. Defined, feeder-independent medium for human embryonic stem cell culture. CURRENT PROTOCOLS IN STEM CELL BIOLOGY 2007; Chapter 1:Unit 1C.2. [PMID: 18785163 DOI: 10.1002/9780470151808.sc01c02s2] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The developmental potential of human ES cells makes them an important tool in developmental, pharmacological, and clinical research. For human ES cell technology to be fully exploited, however, culture efficiency must be improved, large-scale culture enabled, and safety ensured. Traditional human ES cell culture systems have relied on serum products and mouse feeder layers, which limit the scale, present biological variability, and expose the cells to potential contaminants. Defined, feeder-independent culture systems improve the safety and efficiency of ES cell technology, enabling translational research. The protocols herein are designed with the standard research laboratory in mind. They contain recipes for the formulation of mTeSR (a defined medium for human ES cell culture) and detailed protocols for the culture, transfer, and passage of cells grown in these feeder-independent conditions. They provide a basis for routine feeder-independent culture, and a starting point for additional optimization of culture conditions.
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14
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Hunter RHF, Einer-Jensen N, Greve T. Presence and significance of temperature gradients among different ovarian tissues. Microsc Res Tech 2006; 69:501-7. [PMID: 16703612 DOI: 10.1002/jemt.20308] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
After recalling male gonadal physiology in respect of tissue temperatures within the scrotal sac, and raising questions concerning abdominal testes, attention turned to mature Graafian follicles and ovarian stroma. Temperature gradients between such tissues were summarized for human, rabbit, pig, and cow, and generally fell in the range of 1.3-1.7 degrees C: follicles were always cooler than stroma. Measurements were made principally by means of a thermo-sensing camera at midventral laparotomy, but also using microelectrodes or thermistor probes sited in the follicular antrum of rabbits and pigs, respectively. When thermo-imaged under the fimbriated extremity of the Fallopian tube, mature pig follicles and stroma could still be distinguished. Such follicles cooled slightly more rapidly during the first 10 s of a 60-s recording interval, after which curves for the two tissues remained parallel. Arresting ovarian blood supply for 5 min had a negligible influence on the temperature differentials. Endoscopy in three models recorded mean differentials of 0.6 +/- 0.1 degrees C - 1.1 +/- 0.1 degrees C between follicles and stroma, but such follicles had not attained mature diameter. Temperature gradients were thought to be generated at least in part by endothermic reactions within mature follicles, reflecting hydration of large extracellular matrix molecules such as proteoglycans. A contribution to the cooling process from the products of leukocyte activity in the follicle wall and antrum could also be involved. Temperature gradients would be maintained locally by counter-current heat exchange mechanisms and, in this context, the microvasculature and lymphatic flow of individual follicles were found to be appropriate. Observations on the temperature of preovulatory follicles appear relevant to procedures of in vitro maturation and in vitro fertilization.
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Hunter RHF, Einer-Jensen N. Pre-ovulatory temperature gradients within mammalian ovaries: a review. J Anim Physiol Anim Nutr (Berl) 2005; 89:240-3. [PMID: 15972073 DOI: 10.1111/j.1439-0396.2005.00509.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The existence of a temperature gradient between the testis and deep body temperature has been accepted for many years. It is based on two simultaneous principles: cooling of the testis through the scrotal wall and transfer of heat between the testicular blood vessels. The ovary is positioned in the abdomen; a temperature difference parallel to the male system therefore seems less likely. However, the temperature of large follicles has been found to be 0.5 to 1.5 degrees C cooler than the ovarian stroma in rabbits, pigs and, probably, women. The temperature difference seems to be based on a heat-consuming process in the expanding follicullar fluid, and a local transfer of heat between intra-ovarian blood vessels. The reason for the temperature gradient is not yet known; one may speculate of a common reason for the cooling of the gamete in male and female.
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Affiliation(s)
- R H F Hunter
- Department of Clinical Studies--Reproduction, Royal Veterinary and Agricultural University, Frederiksberg C, Denmark
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Yeung QSY, Briton-Jones CM, Tjer GCC, Chiu TTY, Haines C. The efficacy of test tube warming devices used during oocyte retrieval for IVF. J Assist Reprod Genet 2005; 21:355-60. [PMID: 15587139 PMCID: PMC3455234 DOI: 10.1023/b:jarg.0000046203.44045.0e] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
PURPOSE To investigate whether commonly used test tube warming devices maintain a constant temperature in follicular fluid aspirates. METHODS By using a digital thermocouple, temperature was measured and comparisons were made between an analog dry block heater, a digital dry block heater, and a thermostatic test tube heater. RESULTS For small fluid volumes, temperature in the block heaters increased above 37 degrees C after being in the block for over 2 min. The thermostatic heater maintained a constant temperature, but this was below the factory setting of 36.9 degrees C. Temperature maintenance was influenced by fluid volume in each tube. CONCLUSIONS One of the key factors in the handling of gametes and embryos is the maintenance of constant temperature. Test tube warming devices require verification of their ability to maintain fluid at the desired temperature. Temperature may vary with fluid volume and the type of test tube warming device used.
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Affiliation(s)
- Queenie Sum Yee Yeung
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong.
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Cooke S, Tyler JPP, Driscoll G. Objective assessments of temperature maintenance using in vitro culture techniques. J Assist Reprod Genet 2002; 19:368-75. [PMID: 12182443 PMCID: PMC3455576 DOI: 10.1023/a:1016394304339] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
PURPOSE To assess the ability of various facets of embryo culture (microscope stage warmers, volumes of culture media, culture vessel lids, and type of culture incubator) to maintain a constant temperature in vitro. METHODS Ability to maintain 37.0 degrees C in the microenvironment of gametes was recorded by digital thermocouple in the chosen facets of in vitro culture. RESULTS Stage warmers are highly variable in their ability to maintain the set temperature (range 33.8 degrees C-37.0 degrees C after 60 s). Temperature loss in culture media is both volume and vessel dependent, and the direct heat transfer culture incubator (MINC) has superior temperature maintenance compared with a large volume air convection incubator (FORMA), where temperature regain from 35.0 degrees C to 37.0 degrees C took 5.5 min compared to >20 min. CONCLUSIONS There are large measurable differences in the ability to maintain set temperature that depend on the stage warmer used, volume of media, use of vessel lids, and the type of incubator chosen for IVF culture.
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Affiliation(s)
- Simon Cooke
- City West IVF, Westmead, New South Wales, Australia.
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Andrade ER, Rodrigues AP, Amorim CA, Carvalho FC, Dode MA, Figueiredo JR. Short term maintenance of sheep preantral follicles in situ in 0.9% saline and Braun-Collins solution. Small Rumin Res 2001; 41:141-149. [PMID: 11445422 DOI: 10.1016/s0921-4488(01)00200-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The present study has investigated the efficiency of 0.9% saline solution and Braun-Collins solution in the preservation of sheep preantral follicles in situ, at different temperatures and different incubation periods. The ovaries were divided into 19 fragments for each animal. One ovarian fragment was taken randomly and immediately fixed for histology (control-time zero). The other 18 ovarian fragments were randomly distributed in tubes containing 2ml of 0.9% saline solution or Braun-Collins solution at 4, 20 or 39 degrees C for 4, 12 or 24h. A total of 1629, 208 and 63 primordial, primary and secondary follicles were examined, respectively. Histological analysis showed that the storage of ovarian fragments in both solutions at 20 or 39 degrees C significantly reduced the percentage of morphologically normal preantral follicles (MNPF) when compared with the control, except after preservation in 0.9% saline solution at 20 degrees C for 4h. In contrast, the preservation at 4 degrees C, in both solutions, kept the percentage of MNPF similar to control values. In conclusion, this study shows for the first time that sheep preantral follicles can be preserved in situ successfully at 4 degrees C in 0.9% saline solution or Braun-Collins solution for up to 24h.
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Affiliation(s)
- E R. Andrade
- LAMOFOPA, Programa de Pós-Graduação em Ciências Veterinárias, Faculdade de Veterinária, State University of Ceará, Av. Paranjana, 1700 Campus do Itaperi, CEP 60740-000, CE, Fortaleza, Brazil
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