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Li M, Yang C, Duan A, Xiao P, Lu X, Ma X, Xu Y, Zheng W, Feng C, Mo X, Huang C, Huang L, Shang J, Zheng H. CX43 and oxidative stress are the targets of BCB staining to predict the developmental potential of buffalo oocytes. Reprod Domest Anim 2024; 59:e14673. [PMID: 39086079 DOI: 10.1111/rda.14673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 06/28/2024] [Accepted: 07/03/2024] [Indexed: 08/02/2024]
Abstract
This study used the brilliant cresyl blue (BCB) staining method to group buffalo oocytes (BCB+ and BCB-) and perform in vitro maturation, in vitro fertilization and embryo culture. At the same time, molecular biology techniques were used to detect gap junction protein expression and oxidative stress-related indicators to explore the molecular mechanism of BCB staining to predict oocyte developmental potential. The techniques of buffalo oocytes to analyse their developmental potential and used immunofluorescence staining to detect the expression level of CX43 protein, DCFH-DA probe staining to detect ROS levels and qPCR to detect the expression levels of the antioxidant-related genes SOD2 and GPX1. Our results showed that the in vitro maturation rate, embryo cleavage rate and blastocyst rate of buffalo oocytes in the BCB+ group were significantly higher than those in the BCB- group and the control group (p < .05). The expression level of CX43 protein in the BCB+ group was higher than that in the BCB- group both before and after maturation (p < .05). The intensity of ROS in the BCB+ group was significantly lower than that in the BCB- group (p < .05), and the expression levels of the antioxidant-related genes SOD2 and GPX1 in the BCB+ group were significantly higher than those in the BCB- group (p < .05). Brilliant cresyl blue staining could effectively predict the developmental potential of buffalo oocytes. The results of BCB staining were positively correlated with the expression of gap junction protein and antioxidant-related genes and negatively correlated with the reactive oxygen species level, suggesting that the mechanism of BCB staining in predicting the developmental potential of buffalo oocytes might be closely related to antioxidant activity.
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Affiliation(s)
- MengQi Li
- Guangxi Key Laboratory of Buffalo Genetics, Reproduction and Breeding, Guangxi Buffalo Research Institute, Chinese Academy of Agricultural Sciences, Nanning, China
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Animal Science and Technology, Guangxi University, Nanning, Guangxi, China
| | - ChunYan Yang
- Guangxi Key Laboratory of Buffalo Genetics, Reproduction and Breeding, Guangxi Buffalo Research Institute, Chinese Academy of Agricultural Sciences, Nanning, China
- Key Laboratory of Buffalo Genetics, Breeding and Reproduction Technology, Ministry of Agriculture and Rural Affairs, Nanning, China
| | - AnQin Duan
- Guangxi Key Laboratory of Buffalo Genetics, Reproduction and Breeding, Guangxi Buffalo Research Institute, Chinese Academy of Agricultural Sciences, Nanning, China
- Key Laboratory of Buffalo Genetics, Breeding and Reproduction Technology, Ministry of Agriculture and Rural Affairs, Nanning, China
| | - Peng Xiao
- Guangxi Key Laboratory of Buffalo Genetics, Reproduction and Breeding, Guangxi Buffalo Research Institute, Chinese Academy of Agricultural Sciences, Nanning, China
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Animal Science and Technology, Guangxi University, Nanning, Guangxi, China
- College of Animal Science and Technology, Guangxi Vocational University of Agriculture, Nanning, China
| | - XingRong Lu
- Guangxi Key Laboratory of Buffalo Genetics, Reproduction and Breeding, Guangxi Buffalo Research Institute, Chinese Academy of Agricultural Sciences, Nanning, China
- Key Laboratory of Buffalo Genetics, Breeding and Reproduction Technology, Ministry of Agriculture and Rural Affairs, Nanning, China
| | - XiaoYa Ma
- Guangxi Key Laboratory of Buffalo Genetics, Reproduction and Breeding, Guangxi Buffalo Research Institute, Chinese Academy of Agricultural Sciences, Nanning, China
- Key Laboratory of Buffalo Genetics, Breeding and Reproduction Technology, Ministry of Agriculture and Rural Affairs, Nanning, China
| | - YuanYuan Xu
- Guangxi Key Laboratory of Buffalo Genetics, Reproduction and Breeding, Guangxi Buffalo Research Institute, Chinese Academy of Agricultural Sciences, Nanning, China
| | - Wei Zheng
- Guangxi Key Laboratory of Buffalo Genetics, Reproduction and Breeding, Guangxi Buffalo Research Institute, Chinese Academy of Agricultural Sciences, Nanning, China
- Key Laboratory of Buffalo Genetics, Breeding and Reproduction Technology, Ministry of Agriculture and Rural Affairs, Nanning, China
| | - Chao Feng
- Guangxi Key Laboratory of Buffalo Genetics, Reproduction and Breeding, Guangxi Buffalo Research Institute, Chinese Academy of Agricultural Sciences, Nanning, China
- Key Laboratory of Buffalo Genetics, Breeding and Reproduction Technology, Ministry of Agriculture and Rural Affairs, Nanning, China
| | - Xia Mo
- Guangxi Key Laboratory of Buffalo Genetics, Reproduction and Breeding, Guangxi Buffalo Research Institute, Chinese Academy of Agricultural Sciences, Nanning, China
- Key Laboratory of Buffalo Genetics, Breeding and Reproduction Technology, Ministry of Agriculture and Rural Affairs, Nanning, China
| | - ChenQian Huang
- Guangxi Key Laboratory of Buffalo Genetics, Reproduction and Breeding, Guangxi Buffalo Research Institute, Chinese Academy of Agricultural Sciences, Nanning, China
- Key Laboratory of Buffalo Genetics, Breeding and Reproduction Technology, Ministry of Agriculture and Rural Affairs, Nanning, China
| | - LiQing Huang
- Guangxi Key Laboratory of Buffalo Genetics, Reproduction and Breeding, Guangxi Buffalo Research Institute, Chinese Academy of Agricultural Sciences, Nanning, China
| | - JiangHua Shang
- Guangxi Key Laboratory of Buffalo Genetics, Reproduction and Breeding, Guangxi Buffalo Research Institute, Chinese Academy of Agricultural Sciences, Nanning, China
- Key Laboratory of Buffalo Genetics, Breeding and Reproduction Technology, Ministry of Agriculture and Rural Affairs, Nanning, China
| | - HaiYing Zheng
- Guangxi Key Laboratory of Buffalo Genetics, Reproduction and Breeding, Guangxi Buffalo Research Institute, Chinese Academy of Agricultural Sciences, Nanning, China
- Key Laboratory of Buffalo Genetics, Breeding and Reproduction Technology, Ministry of Agriculture and Rural Affairs, Nanning, China
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Nix J, Marrella MA, Oliver MA, Rhoads M, Ealy AD, Biase FH. Cleavage kinetics is a better indicator of embryonic developmental competency than brilliant cresyl blue staining of oocytes. Anim Reprod Sci 2023; 248:107174. [PMID: 36502760 DOI: 10.1016/j.anireprosci.2022.107174] [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: 07/29/2022] [Revised: 11/08/2022] [Accepted: 12/04/2022] [Indexed: 12/12/2022]
Abstract
In vitro production of embryos (IVP) is a valuable technology to produce embryos of high genetic value. Despite advances in IVP, the efficiency of culture systems remains low. One method to increase IVP success is the early selection of oocytes or embryos that may have greater developmental potential. Here, we investigated two methods of selection, namely BCB staining and cleavage kinetics, both individually and in conjunction, for improved developmental outcomes in vitro. We hypothesized that a synergistic use of both BCB staining and cleavage kinetics would result in identification of embryos of greater developmental potential. The selection of oocytes by BCB staining does select for those oocytes with higher developmental potential, as noted by a greater blastocyst development between BCB positive (32.6%) and BCB negative (22.0%) on day 8 post-fertilization. However, the utilization of BCB staining and cleavage kinetics in tandem resulted in a complete masking of the effect observed when using BCB alone. We obtained the highest proportion of blastocyst development per selection group using cleavage kinetics alone, in which 53.1% of embryos grouped as Fast produced a blastocyst, which was significantly different from the three other groups (Fast+, Slow, not cleaved). We observed, however, that the separation of embryos by cleavage kinetics did not predict their survival to cryopreservation. In conclusion, in standard culture systems, cleavage kinetics is an effective method for the selection of embryos with increased developmental potential to develop blastocysts, however, it may not be effective to select healthy embryos for transfer following cryopreservation.
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Affiliation(s)
- Jada Nix
- School of Animal Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
| | - Mackenzie A Marrella
- School of Animal Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
| | - Mary Ali Oliver
- School of Animal Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
| | - Michelle Rhoads
- School of Animal Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
| | - Alan D Ealy
- School of Animal Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
| | - Fernando H Biase
- School of Animal Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States.
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3
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Walker BN, Nix J, Wilson C, Marrella MA, Speckhart SL, Wooldridge L, Yen CN, Bodmer JS, Kirkpatrick LT, Moorey SE, Gerrard DE, Ealy AD, Biase FH. Tight gene co-expression in BCB positive cattle oocytes and their surrounding cumulus cells. Reprod Biol Endocrinol 2022; 20:119. [PMID: 35964078 PMCID: PMC9375383 DOI: 10.1186/s12958-022-00994-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Accepted: 08/02/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Cytoplasmic and nuclear maturation of oocytes, as well as interaction with the surrounding cumulus cells, are important features relevant to the acquisition of developmental competence. METHODS Here, we utilized Brilliant cresyl blue (BCB) to distinguish cattle oocytes with low activity of the enzyme Glucose-6-Phosphate Dehydrogenase, and thus separated fully grown (BCB positive) oocytes from those in the growing phase (BCB negative). We then analyzed the developmental potential of these oocytes, mitochondrial DNA (mtDNA) copy number in single oocytes, and investigated the transcriptome of single oocytes and their surrounding cumulus cells of BCB positive versus BCB negative oocytes. RESULTS The BCB positive oocytes were twice as likely to produce a blastocyst in vitro compared to BCB- oocytes (P < 0.01). We determined that BCB negative oocytes have 1.3-fold more mtDNA copies than BCB positive oocytes (P = 0.004). There was no differential transcript abundance of genes expressed in oocytes, however, 172 genes were identified in cumulus cells with differential transcript abundance (FDR < 0.05) based on the BCB staining of their oocyte. Co-expression analysis between oocytes and their surrounding cumulus cells revealed a subset of genes whose co-expression in BCB positive oocytes (n = 75) and their surrounding cumulus cells (n = 108) compose a unique profile of the cumulus-oocyte complex. CONCLUSIONS If oocytes transition from BCB negative to BCB positive, there is a greater likelihood of producing a blastocyst, and a reduction of mtDNA copies, but there is no systematic variation of transcript abundance. Cumulus cells present changes in transcript abundance, which reflects in a dynamic co-expression between the oocyte and cumulus cells.
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Affiliation(s)
- Bailey N Walker
- School of Animal Sciences, Virginia Polytechnic Institute and State University, 175 W Campus Dr, Blacksburg, VA, 24061, USA
| | - Jada Nix
- School of Animal Sciences, Virginia Polytechnic Institute and State University, 175 W Campus Dr, Blacksburg, VA, 24061, USA
| | - Chace Wilson
- School of Animal Sciences, Virginia Polytechnic Institute and State University, 175 W Campus Dr, Blacksburg, VA, 24061, USA
| | - Mackenzie A Marrella
- School of Animal Sciences, Virginia Polytechnic Institute and State University, 175 W Campus Dr, Blacksburg, VA, 24061, USA
| | - Savannah L Speckhart
- School of Animal Sciences, Virginia Polytechnic Institute and State University, 175 W Campus Dr, Blacksburg, VA, 24061, USA
| | - Lydia Wooldridge
- School of Animal Sciences, Virginia Polytechnic Institute and State University, 175 W Campus Dr, Blacksburg, VA, 24061, USA
| | - Con-Ning Yen
- School of Animal Sciences, Virginia Polytechnic Institute and State University, 175 W Campus Dr, Blacksburg, VA, 24061, USA
| | - Jocelyn S Bodmer
- School of Animal Sciences, Virginia Polytechnic Institute and State University, 175 W Campus Dr, Blacksburg, VA, 24061, USA
| | - Laila T Kirkpatrick
- School of Animal Sciences, Virginia Polytechnic Institute and State University, 175 W Campus Dr, Blacksburg, VA, 24061, USA
| | - Sarah E Moorey
- Department of Animal Science, University of Tennessee, Knoxville, TN, USA
| | - David E Gerrard
- School of Animal Sciences, Virginia Polytechnic Institute and State University, 175 W Campus Dr, Blacksburg, VA, 24061, USA
| | - Alan D Ealy
- School of Animal Sciences, Virginia Polytechnic Institute and State University, 175 W Campus Dr, Blacksburg, VA, 24061, USA
| | - Fernando H Biase
- School of Animal Sciences, Virginia Polytechnic Institute and State University, 175 W Campus Dr, Blacksburg, VA, 24061, USA.
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The developmental competence of bovine oocytes matured in vitro using thymosin beta 4. ANNALS OF ANIMAL SCIENCE 2021. [DOI: 10.2478/aoas-2020-0072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Abstract
The aim of this study was to examine the effect of thymosin beta 4 (Tβ4) during in vitro maturation (IVM) of oocytes and subsequent embryonic development after in vitro fertilization as well as to assess the quality of obtained blastocysts. Cumulus-oocyte complexes (COCs) were matured in vitro in 4 different media: 1. control medium; 2. control media supplemented with 50 ng/mL Tβ4; 3. control media supplemented with 0.5 mg/mL Tβ4; and 4. control media supplemented with 1 mg/mL Tβ4. The quality of the developed blastocysts was analysed by the TUNEL method. The number of cleaved eggs was significantly higher (P<0.05) when gametes were matured in the presence of 50 ng/mL Tβ4 than it was using the other types of media. Additionally, the largest number of blastocysts was observed when 0.5 mg Tβ4 was added to the medium (P<0.05). No significant difference was noted in the mean number of apoptotic nuclei per blastocyst or in the mean number of nuclei per blastocyst in any of the analysed groups. In conclusion, Tβ4 supplementation (50 ng/mL) in maturation medium increased the number of cleaved oocytes, and the number of blastocysts obtained increased when 0.5 mg/mL Tβ4 was used. This positive effect was not observed when a higher concentration of Tβ4 (1 mg/mL) was used.
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Oocyte Selection for In Vitro Embryo Production in Bovine Species: Noninvasive Approaches for New Challenges of Oocyte Competence. Animals (Basel) 2020; 10:ani10122196. [PMID: 33255250 PMCID: PMC7760727 DOI: 10.3390/ani10122196] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 11/17/2020] [Accepted: 11/19/2020] [Indexed: 12/13/2022] Open
Abstract
Simple Summary The efficiency of producing embryos using in vitro technologies in cattle species remains lower when compared to mice, indicating that the proportion of female gametes that fail to develop after in vitro manipulation is considerably large. Considering that the intrinsic quality of the oocyte is one of the main factors affecting embryo production, the precise identification of noninvasive markers that predict oocyte competence is of major interest. The aim of this review was to explore the current literature on different noninvasive markers associated with oocyte quality in the bovine model. Apart from some controversial findings, the presence of cycle-related structures in ovaries, a follicle size between 6 and 10 mm, a large slightly expanded investment without dark areas, large oocyte diameter (>120 microns), dark cytoplasm, and the presence of a round and smooth first polar body have been associated with better embryonic development. In addition, the combination of oocyte and zygote selection, spindle imaging, and the anti-Stokes Raman scattering microscopy together with studies decoding molecular cues in oocyte maturation have the potential to further optimize the identification of oocytes with better developmental competence for in vitro technologies in livestock species. Abstract The efficiency of producing embryos using in vitro technologies in livestock species rarely exceeds the 30–40% threshold, indicating that the proportion of oocytes that fail to develop after in vitro fertilization and culture is considerably large. Considering that the intrinsic quality of the oocyte is one of the main factors affecting blastocyst yield, the precise identification of noninvasive cellular or molecular markers that predict oocyte competence is of major interest to research and practical applications. The aim of this review was to explore the current literature on different noninvasive markers associated with oocyte quality in the bovine model. Apart from some controversial findings, the presence of cycle-related structures in ovaries, a follicle size between 6 and 10 mm, large number of surrounding cumulus cells, slightly expanded investment without dark areas, large oocyte diameter (>120 microns), dark cytoplasm, and the presence of a round and smooth first polar body have been associated with better competence. In addition, the combination of oocyte and zygote selection via brilliant cresyl blue (BCB) test, spindle imaging, and the anti-Stokes Raman scattering microscopy together with studies decoding molecular cues in oocyte maturation have the potential to further optimize the identification of oocytes with better developmental competence for in-vitro-derived technologies in livestock species.
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Gad A, Nemcova L, Murin M, Kinterova V, Kanka J, Laurincik J, Benc M, Pendovski L, Prochazka R. Global transcriptome analysis of porcine oocytes in correlation with follicle size. Mol Reprod Dev 2019; 87:102-114. [PMID: 31736195 DOI: 10.1002/mrd.23294] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Accepted: 10/30/2019] [Indexed: 11/09/2022]
Abstract
Although our knowledge regarding oocyte quality and development has improved significantly, the molecular mechanisms that regulate and determine oocyte developmental competence are still unclear. Therefore, the objective of this study was to identify and analyze the transcriptome profiles of porcine oocytes derived from large or small follicles using RNA high-throughput sequencing technology. RNA libraries were constructed from oocytes of large (LO; 3-6 mm) or small (SO; 1.5-1.9 mm) ovarian follicles and then sequenced in an Illumina HiSeq4000. Transcriptome analysis showed a total of 14,557 genes were commonly detected in both oocyte groups. Genes related to the cell cycle, oocyte meiosis, and quality were among the top highly expressed genes in both groups. Differential expression analysis revealed 60 up- and 262 downregulated genes in the LO compared with the SO group. BRCA2, GPLD1, ZP3, ND3, and ND4L were among the highly abundant and highly significant differentially expressed genes (DEGs). The ontological classification of DEGs indicated that protein processing in endoplasmic reticulum was the top enriched pathway. In addition, biological processes related to cell growth and signaling, gene expression regulations, cytoskeleton, and extracellular matrix organization were among the highly enriched processes. In conclusion, this study provides new insights into the global transcriptome changes and the abundance of specific transcripts in porcine oocytes in correlation with follicle size.
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Affiliation(s)
- Ahmed Gad
- Laboratory of Developmental Biology, Institute of Animal Physiology and Genetics of the Czech Academy of Sciences, Liběchov, Czech Republic.,Department of Animal Production, Faculty of Agriculture, Cairo University, Giza, Egypt
| | - Lucie Nemcova
- Laboratory of Developmental Biology, Institute of Animal Physiology and Genetics of the Czech Academy of Sciences, Liběchov, Czech Republic
| | - Matej Murin
- Laboratory of Developmental Biology, Institute of Animal Physiology and Genetics of the Czech Academy of Sciences, Liběchov, Czech Republic
| | - Veronika Kinterova
- Laboratory of Developmental Biology, Institute of Animal Physiology and Genetics of the Czech Academy of Sciences, Liběchov, Czech Republic
| | - Jiri Kanka
- Laboratory of Developmental Biology, Institute of Animal Physiology and Genetics of the Czech Academy of Sciences, Liběchov, Czech Republic
| | - Jozef Laurincik
- Laboratory of Developmental Biology, Institute of Animal Physiology and Genetics of the Czech Academy of Sciences, Liběchov, Czech Republic.,Department of Zoology and Anthropology, Faculty of Natural Sciences, Constantine the Philosopher University in Nitra, Nitra, Slovak Republic
| | - Michal Benc
- Department of Zoology and Anthropology, Faculty of Natural Sciences, Constantine the Philosopher University in Nitra, Nitra, Slovak Republic.,Biology of Reproduction Department, Institute of Animal Science, Prague, Uhrineves, Czech Republic
| | - Lazo Pendovski
- Department of Functional Morphology, Faculty of Veterinary Medicine, Ss. Cyril and Methodius University in Skopje, Skopje, Republic of Macedonia
| | - Radek Prochazka
- Laboratory of Developmental Biology, Institute of Animal Physiology and Genetics of the Czech Academy of Sciences, Liběchov, Czech Republic
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Bahrami M, Morris MB, Day ML. Amino acid supplementation of a simple inorganic salt solution supports efficient in vitro maturation (IVM) of bovine oocytes. Sci Rep 2019; 9:11739. [PMID: 31409817 PMCID: PMC6692353 DOI: 10.1038/s41598-019-48038-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Accepted: 07/18/2019] [Indexed: 01/08/2023] Open
Abstract
Defining oocyte in vitro maturation (IVM) conditions allows for improved reproducibility and efficiency of bovine embryo production. IVM conditions for bovine oocytes have been extensively studied, but beneficial effects of individual supplements remain controversial. This study compared methods of cumulus oocyte complex (COC) isolation, and culture medium requirements, for IVM in order to define optimal conditions. Antral follicles in ovaries were sliced or aspirated to isolate COCs. Brilliant cresyl blue staining of COCs was used to determine the most effective collection technique and the effect of hormones and groups of amino acids in the culture medium was investigated. Our results showed COCs isolated through aspiration had greater meiotic competency to reach MII. Oocyte maturation was achieved with the addition of 1 µg/mL FSH, while estrogen and human chorionic gonadotrophin did not increase the number of MII oocytes. We also provide novel data, that supplementation of a simple inorganic salt solution with L-proline, L-glutamine and essential amino acids in combination, but not individually, resulted in nuclear maturation comparable to TCM199, a more complex medium containing all 20 common amino acids, vitamins, inorganic salts and FBS. Replacement of FBS with BSA in this simplified medium creates a defined medium which provides conditions for IVM that enable reproducible maturation rates.
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Affiliation(s)
- Mohammad Bahrami
- Discipline of Physiology and Bosch Institute, School of Medical Sciences, Faculty of Medicine and Health, University of Sydney, New South Wales, Australia
| | - Michael B Morris
- Discipline of Physiology and Bosch Institute, School of Medical Sciences, Faculty of Medicine and Health, University of Sydney, New South Wales, Australia
| | - Margot L Day
- Discipline of Physiology and Bosch Institute, School of Medical Sciences, Faculty of Medicine and Health, University of Sydney, New South Wales, Australia.
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8
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Use of oocytes selected by brilliant cresyl blue staining enhances rabbit cloned embryo development in vitro. ZYGOTE 2019; 27:166-172. [DOI: 10.1017/s0967199419000200] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
SummaryRabbits play an important role in people’s lives due to their high nutritional value and high-quality hair that can be used as raw material for textiles. Furthermore, rabbits are an important animal model for human disease, as genome-edited animals are particularly valuable for studying gene functions and pathogenesis. Somatic cell nuclear transfer (SCNT) is an important technique for producing genome-edited animals and it has great value in saving endangered species and in clone stem cell therapy. However, the low efficiency of SCNT limits its application, with the selection of suitable rabbit oocytes being crucial to its success. In the present study, we collected oocytes from ovarian follicles and stained them with 26 μM brilliant cresyl blue (BCB). We then matured the oocytes in vitro and used them for SCNT. Comparison of the BCB-positive oocytes with BCB-negative oocytes and the control group showed that the BCB-positive group had a significantly higher maturation rate (81.4% vs. 48.9% and 65.3% for the negative and control groups, respectively), cleavage rate (86.6% vs. 67.9% and 77.9%), blastocyst rate (30.5% vs. 12.8% and 19.6%), total number of blastocysts (90±7.5 vs. 65.3±6.3 and 67.5±5.7), and inner cell mass (ICM)/ trophectoderm (TE) index (42.3±4.2 vs. 30.2±2.1 and 33.9±5.1) (P<0.05). The BCB-positive group had a significantly lower apoptosis index (2.1±0.6 vs. 8.2±0.9 and 6.7±1.1 for the negative and control groups, respectively) (P<0.05). These findings demonstrate that BCB-positive oocytes have a higher maturation ability and developmental competence in vitro, indicating that BCB staining is a reliable method for selecting oocytes to enhance the efficiency of SCNT.
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Srirattana K, St John JC. Transmission of Dysfunctional Mitochondrial DNA and Its Implications for Mammalian Reproduction. ADVANCES IN ANATOMY, EMBRYOLOGY, AND CELL BIOLOGY 2019; 231:75-103. [PMID: 30617719 DOI: 10.1007/102_2018_3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Mitochondrial DNA (mtDNA) encodes proteins for the electron transport chain which produces the vast majority of cellular energy. MtDNA has its own replication and transcription machinery that relies on nuclear-encoded transcription and replication factors. MtDNA is inherited in a non-Mendelian fashion as maternal-only mtDNA is passed onto the next generation. Mutation to mtDNA can cause mitochondrial dysfunction, which affects energy production and tissue and organ function. In somatic cell nuclear transfer (SCNT), there is an issue with the mixing of two populations of mtDNA, namely from the donor cell and recipient oocyte. This review focuses on the transmission of mtDNA in SCNT embryos and offspring. The transmission of donor cell mtDNA can be prevented by depleting the donor cell of its mtDNA using mtDNA depletion agents prior to SCNT. As a result, SCNT embryos harbour oocyte-only mtDNA. Moreover, culturing SCNT embryos derived from mtDNA depleted cells in media supplemented with a nuclear reprograming agent can increase the levels of expression of genes related to embryo development when compared with non-depleted cell-derived embryos. Furthermore, we have reviewed how mitochondrial supplementation in oocytes can have beneficial effects for SCNT embryos by increasing mtDNA copy number and the levels of expression of genes involved in energy production and decreasing the levels of expression of genes involved in embryonic cell death. Notably, there are beneficial effects of mtDNA supplementation over the use of nuclear reprograming agents in terms of regulating gene expression in embryos. Taken together, manipulating mtDNA in donor cells and/or oocytes prior to SCNT could enhance embryo production efficiency.
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Affiliation(s)
- Kanokwan Srirattana
- Mitochondrial Genetics Group, Hudson Institute of Medical Research, Clayton, VIC, Australia.,Department of Molecular and Translational Sciences, Monash University, Clayton, VIC, Australia
| | - Justin C St John
- Mitochondrial Genetics Group, Hudson Institute of Medical Research, Clayton, VIC, Australia. .,Department of Molecular and Translational Sciences, Monash University, Clayton, VIC, Australia.
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Liu XM, Wang YK, Liu YH, Yu XX, Wang PC, Li X, Du ZQ, Yang CX. Single-cell transcriptome sequencing reveals that cell division cycle 5-like protein is essential for porcine oocyte maturation. J Biol Chem 2017; 293:1767-1780. [PMID: 29222335 DOI: 10.1074/jbc.m117.809608] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 12/03/2017] [Indexed: 02/02/2023] Open
Abstract
The brilliant cresyl blue (BCB) test is used in both basic biological research and assisted reproduction to identify oocytes likely to be developmentally competent. However, the underlying molecular mechanism targeted by the BCB test is still unclear. To explore this question, we first confirmed that BCB-positive porcine oocytes had higher rates of meiotic maturation, better rates of cleavage and development into blastocysts, and lower death rates. Subsequent single-cell transcriptome sequencing on porcine germinal vesicle (GV)-stage oocytes identified 155 genes that were significantly differentially expressed between BCB-negative and BCB-positive oocytes. These included genes such as cdc5l, ldha, spata22, rgs2, paip1, wee1b, and hsp27, which are enriched in functionally important signaling pathways including cell cycle regulation, oocyte meiosis, spliceosome formation, and nucleotide excision repair. In BCB-positive GV oocytes that additionally had a lower frequency of DNA double-strand breaks, the CDC5L protein was significantly more abundant. cdc5l/CDC5L inhibition by short interference (si)RNA or antibody microinjection significantly impaired porcine oocyte meiotic maturation and subsequent parthenote development. Taken together, our single-oocyte sequencing data point to a potential new role for CDC5L in porcine oocyte meiosis and early embryo development, and supports further analysis of this protein in the context of the BCB test.
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Affiliation(s)
- Xiao-Man Liu
- From the Key Laboratory of Animal Cellular and Genetic Engineering of Heilongjiang Province, College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China
| | - Yan-Kui Wang
- From the Key Laboratory of Animal Cellular and Genetic Engineering of Heilongjiang Province, College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China
| | - Yun-Hua Liu
- From the Key Laboratory of Animal Cellular and Genetic Engineering of Heilongjiang Province, College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China
| | - Xiao-Xia Yu
- From the Key Laboratory of Animal Cellular and Genetic Engineering of Heilongjiang Province, College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China
| | - Pei-Chao Wang
- From the Key Laboratory of Animal Cellular and Genetic Engineering of Heilongjiang Province, College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China
| | - Xuan Li
- From the Key Laboratory of Animal Cellular and Genetic Engineering of Heilongjiang Province, College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China
| | - Zhi-Qiang Du
- From the Key Laboratory of Animal Cellular and Genetic Engineering of Heilongjiang Province, College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China
| | - Cai-Xia Yang
- From the Key Laboratory of Animal Cellular and Genetic Engineering of Heilongjiang Province, College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China
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Zare Z, Abouhamzeh B, Masteri Farahani R, Salehi M, Mohammadi M. Supplementation of L-carnitine during in vitro maturation of mouse oocytes affects expression of genes involved in oocyte and embryo competence:An experimental study. Int J Reprod Biomed 2017. [DOI: 10.29252/ijrm.15.12.779] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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Kumar S, Kumar M, Dholpuria S, Sarwalia P, Batra V, De S, Kumar R, Datta TK. Transient Arrest of Germinal Vesicle Breakdown Improved In Vitro Development Potential of Buffalo (Bubalus Bubalis) Oocytes. J Cell Biochem 2017; 119:278-289. [PMID: 28543358 DOI: 10.1002/jcb.26171] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Accepted: 05/24/2017] [Indexed: 11/09/2022]
Abstract
Germinal vesicle breakdown (GVBD) is the first milestone that an oocyte needs to achieve toward completing the maturation and gaining potential to fertilize. Significantly lower in vitro embryo production rate in buffaloes can be attributed to heterogeneity of GVBD occurrence among oocytes obtained from abattoir derived ovaries. Evidence from our earlier work had suggested that different qualities of buffalo oocytes differ significantly in their timing of GVBD. Besides, these oocytes also differ in terms of volume of Akt phosphorylation, which initiates the process of GVBD. With objective of synchronizing the oocytes for GVBD, immature buffalo oocytes were subjected to a two-step culture protocol, initially in the presence of GVBD inhibitors and subsequently, in vitro maturation (IVM) with added SC79 (activates Akt). Expression of developmentally important genes was assessed along with embryo development rate and blastocyst health to interpret the consequences. Oocytes subjected to a short GVBD inhibition period of 6 h followed by IVM with SC79 resulted in improved cleavage and blastocyst rates. Resultant blastocysts also possessed higher ICM: TE ratio. Further, GVBD inhibited oocytes displayed a sustained cytoplasmic maturation status in terms of reorganization of cortical granules (CGs), mitochondrial membrane potential, and glutathione levels during the period of inhibition. We conclude that a temporary GVBD arrest of buffalo oocytes and modulation of Akt improves the in vitro embryo development rate as well as quality of resultant embryos. Besides, our meiotic arrest protocol does not affect the cytoplasmic maturation. J. Cell. Biochem. 119: 278-289, 2018. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Sandeep Kumar
- Animal Biotechnology Centre, National Dairy Research Institute, Karnal, Haryana, 132001, India
| | - Manish Kumar
- Animal Biotechnology Centre, National Dairy Research Institute, Karnal, Haryana, 132001, India
| | - Sunny Dholpuria
- Animal Biotechnology Centre, National Dairy Research Institute, Karnal, Haryana, 132001, India
| | - Parul Sarwalia
- Animal Biotechnology Centre, National Dairy Research Institute, Karnal, Haryana, 132001, India
| | - Vipul Batra
- Animal Biotechnology Centre, National Dairy Research Institute, Karnal, Haryana, 132001, India
| | - Sachinandan De
- Animal Biotechnology Centre, National Dairy Research Institute, Karnal, Haryana, 132001, India
| | - Rakesh Kumar
- Animal Biotechnology Centre, National Dairy Research Institute, Karnal, Haryana, 132001, India
| | - Tirtha Kumar Datta
- Animal Biotechnology Centre, National Dairy Research Institute, Karnal, Haryana, 132001, India
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Duarte Alcoba D, Gonsales Valério E, Conzatti M, Schneider J, Capp E, von Eye Corleta H, Brum IS. Selection of developmentally competent human oocytes aspirated during cesarean section. J Matern Fetal Neonatal Med 2017; 31:735-739. [DOI: 10.1080/14767058.2017.1297405] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Diego Duarte Alcoba
- Instituto de Ciências Básicas da Saúde (ICBS), Laboratório de Biologia Molecular Endócrina e Tumoral – Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Edimárlei Gonsales Valério
- Serviço de Ginecologia e Obstetrícia – Hospital de Clínicas de Porto Alegre (HCPA), Rua Ramiro Barcelos, Porto Alegre, Rio Grande do Sul (RS), Brazil
| | - Maiara Conzatti
- Instituto de Ciências Básicas da Saúde (ICBS), Laboratório de Biologia Molecular Endócrina e Tumoral – Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Júlia Schneider
- Instituto de Ciências Básicas da Saúde (ICBS), Laboratório de Biologia Molecular Endócrina e Tumoral – Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Edison Capp
- Serviço de Ginecologia e Obstetrícia – Hospital de Clínicas de Porto Alegre (HCPA), Rua Ramiro Barcelos, Porto Alegre, Rio Grande do Sul (RS), Brazil
- Department of Gynecological Endocrinology and Reproductive Medicine, University Hospital Heidelberg, Heidelberg, Germany
| | - Helena von Eye Corleta
- Serviço de Ginecologia e Obstetrícia – Hospital de Clínicas de Porto Alegre (HCPA), Rua Ramiro Barcelos, Porto Alegre, Rio Grande do Sul (RS), Brazil
| | - Ilma Simoni Brum
- Instituto de Ciências Básicas da Saúde (ICBS), Laboratório de Biologia Molecular Endócrina e Tumoral – Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
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Alcoba DD, Schneider J, Arruda L, Martiny PB, Capp E, von Eye Corleta H, Brum IS. Brilliant cresyl blue staining does not present cytotoxic effects on human luteinized follicular cells, according to gene/protein expression, as well as to cytotoxicity tests. Reprod Biol 2017; 17:60-68. [PMID: 28063736 DOI: 10.1016/j.repbio.2016.12.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Revised: 11/20/2016] [Accepted: 12/19/2016] [Indexed: 12/16/2022]
Abstract
In vitro oocyte maturation presents many advantages and its success is related to the selection of fully grown oocytes. In animal models, staining of cumulus-oocyte complexes (COCs) with Brilliant Cresyl Blue (BCB) is widely used for this selection. However, a lack of information about the safety of BCB makes its applicability in humans questionable. Because granulosa and cumulus cells have a close relationship with the oocyte and taking into account that follicular cells are also exposed to BCB when this pre-selection method is applied, we aimed to evaluate the effects of BCB on human follicular cells exposed to BCB. Cytotoxicity tests (Sulforhodamine B and Neutral Red Uptake) and gene and protein expression of elements related to the cell cycle (BAX, BCL2, TP53 and CDKN1A), as well as to cell death and metabolism (GAPDH), glucose consumption, and estradiol and progesterone secretion, were examined in granulosa and cumulus cells with and without exposure to BCB. Regardless estradiol secretion and glucose consumption, all other evaluations presented similar results between control and treated (BCB) groups, independently of cell type. Therefore, our results demonstrate convincingly that BCB seems to be safe for use in humans and it should encourage future studies to evaluate the development of embryos derived from human oocytes selected by BCB staining.
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Affiliation(s)
- Diego Duarte Alcoba
- Institute of Health Sciences/Department of Physiology, Universidade Federal do Rio Grande do Sul, 90050-170, Porto Alegre, Brazil.
| | - Júlia Schneider
- Institute of Health Sciences/Department of Physiology, Universidade Federal do Rio Grande do Sul, 90050-170, Porto Alegre, Brazil
| | - Letícia Arruda
- Institute of Health Sciences/Department of Physiology, Universidade Federal do Rio Grande do Sul, 90050-170, Porto Alegre, Brazil
| | - Patrícia Borba Martiny
- Institute of Health Sciences/Department of Physiology, Universidade Federal do Rio Grande do Sul, 90050-170, Porto Alegre, Brazil
| | - Edison Capp
- Service of Gynecology and Obstetrics, Hospital de Clínicas de Porto Alegre, 90035-903, Porto Alegre, Brazil; Department of Gynecological Endocrinology and Reproductive Medicine, University Women's Hospital, 69120, Heidelberg, Germany
| | - Helena von Eye Corleta
- Institute of Health Sciences/Department of Physiology, Universidade Federal do Rio Grande do Sul, 90050-170, Porto Alegre, Brazil; Service of Gynecology and Obstetrics, Hospital de Clínicas de Porto Alegre, 90035-903, Porto Alegre, Brazil
| | - Ilma Simoni Brum
- Institute of Health Sciences/Department of Physiology, Universidade Federal do Rio Grande do Sul, 90050-170, Porto Alegre, Brazil
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Yang M, Hall J, Fan Z, Regouski M, Meng Q, Rutigliano HM, Stott R, Rood KA, Panter KE, Polejaeva IA. Oocytes from small and large follicles exhibit similar development competence following goat cloning despite their differences in meiotic and cytoplasmic maturation. Theriogenology 2016; 86:2302-2311. [PMID: 27650944 DOI: 10.1016/j.theriogenology.2016.07.026] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Revised: 07/19/2016] [Accepted: 07/25/2016] [Indexed: 11/26/2022]
Abstract
Reduced developmental competence after IVF has been reported using oocyte derived from small follicles in several species including cattle, sheep, and goats. No information is currently available about the effect of follicle size of the cytoplast donor on in vivo development after somatic cell nuclear transfer (SCNT) in goats. Oocytes collected from large (≥3 mm) and small follicles (<3 mm) were examined for maturation and in vivo developmental competence after SCNT. Significantly greater maturation rate was observed in oocytes derived from large follicles compared with that of small follicles (51.6% and 33.7%, P < 0.05). Greater percent of large follicle oocytes exhibited a low glucose-6-phosphate dehydrogenase activity at germinal vesicle stage compared with small follicle oocytes (54.9% and 38.7%, P < 0.05). Relative mRNA expression analysis of 48 genes associated with embryonic and fetal development revealed that three genes (MATER, IGF2R, and GRB10) had higher level of expression in metaphase II oocytes from large follicles compared with oocytes from small follicles. Nevertheless, no difference was observed in pregnancy rates (33.3% vs. 47.1%) and birth rates (22.2% vs. 16.7%) after SCNT between the large and small follicle groups). These results indicate that metaphase II cytoplasts from small and large follicles have similar developmental competence when used in goat SCNT.
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Affiliation(s)
- Min Yang
- Department of Animal, Dairy, and Veterinary Sciences, Utah State University, Logan, Utah, USA
| | - Justin Hall
- Department of Animal, Dairy, and Veterinary Sciences, Utah State University, Logan, Utah, USA
| | - Zhiqiang Fan
- Department of Animal, Dairy, and Veterinary Sciences, Utah State University, Logan, Utah, USA
| | - Misha Regouski
- Department of Animal, Dairy, and Veterinary Sciences, Utah State University, Logan, Utah, USA
| | - Qinggang Meng
- Department of Animal, Dairy, and Veterinary Sciences, Utah State University, Logan, Utah, USA
| | - Heloisa M Rutigliano
- Department of Animal, Dairy, and Veterinary Sciences, Utah State University, Logan, Utah, USA; School of Veterinary Medicine, Utah State University, Logan, Utah, USA
| | - Rusty Stott
- Department of Animal, Dairy, and Veterinary Sciences, Utah State University, Logan, Utah, USA; School of Veterinary Medicine, Utah State University, Logan, Utah, USA
| | - Kerry A Rood
- Department of Animal, Dairy, and Veterinary Sciences, Utah State University, Logan, Utah, USA; School of Veterinary Medicine, Utah State University, Logan, Utah, USA
| | - Kip E Panter
- USDA ARS Poisonous Plant Research Laboratory, Logan, Utah, USA
| | - Irina A Polejaeva
- Department of Animal, Dairy, and Veterinary Sciences, Utah State University, Logan, Utah, USA.
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