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Momeni A, Haghpanah T, Nematollahi-Mahani SN, Ashourzadeh S, Eftekhar-Vaghefi SH. Comparing the effects of vitrification, before and after mouse oocyte in vitro maturation on developmental competence, changes in epigenetic regulators and stress oxidative response. Biochem Biophys Res Commun 2023; 679:179-190. [PMID: 37703761 DOI: 10.1016/j.bbrc.2023.09.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Revised: 08/13/2023] [Accepted: 09/02/2023] [Indexed: 09/15/2023]
Abstract
Since the developmental stage of oocyte is a challenging issue in the success of vitrification, this study investigated the effects of vitrification, before and after in vitro maturation, on the survival and maturation rates, developmental competence and the expression levels of genes involved in apoptosis, oxidative stress and epigenetic modifications. Mouse germinal vesicle (GV) oocytes were divided into four groups: fresh in vitro matured oocytes without vitrification (fIVM), in vitro matured oocytes after vitrification (vIVM), in vitro matured oocytes before vitrification (IVMv). In addition, in vivo matured oocytes (MII) were used as control. After oocytes collection, maturation and survival rates as well as the intracellular reactive oxygen species (ROS) level were evaluated. Also, the expression level of various genes was analyzed by qRT-PCR. In addition, following artificial activation (parthenogenesis), the developmental competence of oocytes to the blastocyst stage was evaluated. A significant decrease in maturation rate and survival of vIVM oocytes was observed compared to fIVM and IVMv oocytes. Intracellular ROS levels were significantly increased in both vitrified groups compared to the fIVM group, and no significant difference between vitrified groups. Pro-apoptotic genes; BAX and Bcl2 as well as genes related to oxidative stress response Hsp1a, Hsp1b and SOD1were significantly increased in the vIVM group compared to the IVMv group. Interestingly, epigenetic regulators genes DNMT1, DNMT3a and DNMT3b were highly expressed in IVMv oocytes along with a decrease in the artificial activation rate compared to the vIVM oocytes. Our results indicated that despite observing more negative effects of vitrification before IVM on the survival rate and maturation as well as apoptosis status, less epigenetic changes in vIVM oocytes can make this process a better option in the treatment of infertility than IVM of oocytes followed by vitrification, a hypothesis that needs to be investigation in human oocytes.
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Affiliation(s)
- Asma Momeni
- Anatomical Sciences Department, School of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Tahereh Haghpanah
- Anatomical Sciences Department, School of Medicine, Kerman University of Medical Sciences, Kerman, Iran.
| | | | - Sareh Ashourzadeh
- Afzalipour Clinical Center for Infertility, Kerman University of Medical Sciences, Afzalipour Hospital, Kerman, Iran
| | - Seyed Hassan Eftekhar-Vaghefi
- Anatomical Sciences Department, School of Medicine, Kerman University of Medical Sciences, Kerman, Iran; Department of Anatomy, Kerman Branch, Islamic Azad University, Kerman, Iran.
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Alzamrooni A, Mendes Vieira P, Murciano N, Wolton M, Schubert FR, Robson SC, Dietrich S. Cardiac competence of the paraxial head mesoderm fades concomitant with a shift towards the head skeletal muscle programme. Dev Biol 2023; 501:39-59. [PMID: 37301464 DOI: 10.1016/j.ydbio.2023.06.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Revised: 06/03/2023] [Accepted: 06/07/2023] [Indexed: 06/12/2023]
Abstract
The vertebrate head mesoderm provides the heart, the great vessels, some smooth and most head skeletal muscle, in addition to parts of the skull. It has been speculated that the ability to generate cardiac and smooth muscle is the evolutionary ground-state of the tissue. However, whether indeed the entire head mesoderm has generic cardiac competence, how long this may last, and what happens as cardiac competence fades, is not clear. Bone morphogenetic proteins (Bmps) are known to promote cardiogenesis. Using 41 different marker genes in the chicken embryo, we show that the paraxial head mesoderm that normally does not engage in cardiogenesis has the ability to respond to Bmp for a long time. However, Bmp signals are interpreted differently at different time points. Up to early head fold stages, the paraxial head mesoderm is able to read Bmps as signal to engage in the cardiac programme; the ability to upregulate smooth muscle markers is retained slightly longer. Notably, as cardiac competence fades, Bmp promotes the head skeletal muscle programme instead. The switch from cardiac to skeletal muscle competence is Wnt-independent as Wnt caudalises the head mesoderm and also suppresses Msc-inducing Bmp provided by the prechordal plate, thus suppressing both the cardiac and the head skeletal muscle programmes. Our study for the first time suggests a specific transition state in the embryo when cardiac competence is replaced by skeletal muscle competence. It sets the stage to unravel the cardiac-skeletal muscle antagonism that is known to partially collapse in heart failure.
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Affiliation(s)
- Afnan Alzamrooni
- Institute of Biological and Biomedical Sciences, School of Pharmacy and Biomedical Sciences, University of Portsmouth, Portsmouth, UK
| | - Petra Mendes Vieira
- Institute of Biological and Biomedical Sciences, School of Pharmacy and Biomedical Sciences, University of Portsmouth, Portsmouth, UK
| | - Nicoletta Murciano
- Institute of Biological and Biomedical Sciences, School of Pharmacy and Biomedical Sciences, University of Portsmouth, Portsmouth, UK; Nanion Technologies GmbH, Ganghoferstr. 70A, DE - 80339, München, Germany; Saarland University, Theoretical Medicine and Biosciences, Kirrbergerstr. 100, DE - 66424, Homburg, Germany
| | - Matthew Wolton
- Institute of Biological and Biomedical Sciences, School of Pharmacy and Biomedical Sciences, University of Portsmouth, Portsmouth, UK
| | - Frank R Schubert
- Institute of Biological and Biomedical Sciences, School of Biological Sciences, University of Portsmouth, Portsmouth, UK
| | - Samuel C Robson
- Institute of Biological and Biomedical Sciences, Faculty of Science & Health, University of Portsmouth, Portsmouth, UK
| | - Susanne Dietrich
- Institute of Biological and Biomedical Sciences, School of Pharmacy and Biomedical Sciences, University of Portsmouth, Portsmouth, UK.
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Martínez-Moro Á, González-Brusi L, Lamas-Toranzo I, González-Dosal P, Rodríguez-Juárez F, Bermejo-Álvarez P. The human cumulus cell transcriptome provides poor predictive value for embryo transfer outcome. Reprod Biomed Online 2023; 46:783-791. [PMID: 36922313 DOI: 10.1016/j.rbmo.2023.01.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 01/07/2023] [Accepted: 01/11/2023] [Indexed: 01/21/2023]
Abstract
RESEARCH QUESTION Is the transcriptome of cumulus cells a good predictor of the embryo's developmental competence? DESIGN Cumulus cells were collected from donor oocytes and their transcriptome was analysed by RNA sequencing analysis at >30 × 106 reads in samples grouped according to the developmental potential of their enclosed oocyte: not able to develop to the blastocyst stage (Bl-), able to develop to the blastocyst stage but failing to establish a pregnancy (P-), or able to develop to the blastocyst stage and to establish a clinical pregnancy (P+). RESULTS The cumulus cell trancriptome was largely independent of the developmental potential as, using a false dscovery rate-adjusted P-value of <0.05, only 10, 11 and 5 genes were differentially expressed for the comparisons P+ versus P-, P+ versus Bl-, and P- versus Bl-, respectively, out of a total of 17,469 genes expressed. Between the differentially expressed genes, those showing little overlap between samples from different groups were CHAC1, up-regulated in the P- and P+ groups compared with the Bl- group, and CENPE, CD93, PECAM1 and HSPA1B, which showed the opposite expression pattern. Focusing on the pregnancy potential, only EPN3 was consistently downregulated in the P+ compared with the P- and Bl- groups. CONCLUSIONS The cumulus cell transcriptome is largely unrelated to the establishment of clinical pregnancy following embryo transfer, although the expression level of a subset of genes in cumulus cells may indicate the ability to develop to the blastocyst stage.
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Affiliation(s)
- Álvaro Martínez-Moro
- Animal Reproduction Department, INIA, CSIC, Madrid, Spain; IVF Spain Madrid, Madrid, Spain
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Luciano AM, Franciosi F, Dey P, Ladron De Guevara M, Monferini N, Bonumallu SKN, Musmeci G, Fagali Franchi F, Garcia Barros R, Colombo M, Lodde V. Progress toward species-tailored prematuration approaches in carnivores. Theriogenology 2023; 196:202-213. [PMID: 36423514 DOI: 10.1016/j.theriogenology.2022.11.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 11/05/2022] [Accepted: 11/09/2022] [Indexed: 11/13/2022]
Abstract
In the past four decades, the bovine model has been highly informative and inspiring to assisted reproductive technologies (ART) in other species. Most of the recent advances in ART have come from studies in cattle, particularly those unveiling the importance of several processes that must be recapitulated in vitro to ensure the proper development of the oocyte. The maintenance of structural and functional communications between the cumulus cells and the oocyte and a well-orchestrated chromatin remodeling with the gradual silencing of transcriptional activity represent essential processes for the progressive acquisition of oocyte developmental competence. These markers are now considered the milestones of physiological approaches to increase the efficiency of reproductive technologies. Different in vitro approaches have been proposed. In particular, the so-called "pre-IVM" or "prematuration" is a culture step performed before in vitro maturation (IVM) to support the completion of the oocyte differentiation process. Although these attempts only partially improved the embryo quality and yield, they currently represent a proof of principle that oocytes retrieved from an ovary or an ovarian batch shouldn't be treated as a whole and that tailored approaches can be developed for culturing competent oocytes in several species, including humans. An advancement in ART's efficiency would be desirable in carnivores, where the success is still limited. Since the progress in reproductive medicine has often come from comparative studies, this review highlights aspects that have been critical in other species and how they may be extended to carnivores.
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Affiliation(s)
- Alberto Maria Luciano
- Reproductive and Developmental Biology Laboratory, Department of Veterinary Medicine and Animal Sciences, University of Milan, 26900, Lodi, Italy.
| | - Federica Franciosi
- Reproductive and Developmental Biology Laboratory, Department of Veterinary Medicine and Animal Sciences, University of Milan, 26900, Lodi, Italy
| | - Pritha Dey
- Reproductive and Developmental Biology Laboratory, Department of Veterinary Medicine and Animal Sciences, University of Milan, 26900, Lodi, Italy
| | - Magdalena Ladron De Guevara
- Reproductive and Developmental Biology Laboratory, Department of Veterinary Medicine and Animal Sciences, University of Milan, 26900, Lodi, Italy
| | - Noemi Monferini
- Reproductive and Developmental Biology Laboratory, Department of Veterinary Medicine and Animal Sciences, University of Milan, 26900, Lodi, Italy
| | - Sai Kamal Nag Bonumallu
- Reproductive and Developmental Biology Laboratory, Department of Veterinary Medicine and Animal Sciences, University of Milan, 26900, Lodi, Italy
| | - Giulia Musmeci
- Reproductive and Developmental Biology Laboratory, Department of Veterinary Medicine and Animal Sciences, University of Milan, 26900, Lodi, Italy
| | - Fernanda Fagali Franchi
- Reproductive and Developmental Biology Laboratory, Department of Veterinary Medicine and Animal Sciences, University of Milan, 26900, Lodi, Italy
| | - Rodrigo Garcia Barros
- Reproductive and Developmental Biology Laboratory, Department of Veterinary Medicine and Animal Sciences, University of Milan, 26900, Lodi, Italy
| | - Martina Colombo
- Reproductive and Developmental Biology Laboratory, Department of Veterinary Medicine and Animal Sciences, University of Milan, 26900, Lodi, Italy
| | - Valentina Lodde
- Reproductive and Developmental Biology Laboratory, Department of Veterinary Medicine and Animal Sciences, University of Milan, 26900, Lodi, Italy
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Liu Y, Xin J, Zhang S, Li Q, Wang W, Chen J, Ming X, Wu X, Cao X, Cui W, Wang H, Li W. Expression patterns and biological function of BCL2L10 during mouse preimplantation development. Gene Expr Patterns 2022; 46:119285. [PMID: 36341977 DOI: 10.1016/j.gep.2022.119285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2022] [Revised: 10/02/2022] [Accepted: 10/24/2022] [Indexed: 11/04/2022]
Abstract
BCL2-like 10 (BCL2L10) is abundantly expressed in mammalian oocytes and plays a crucial role in the completion of oocyte meiosis. However, the expression patterns of BCL2L10 and its biological functions during preimplantation development have not been well characterized. Here, we investigated the spatiotemporal expressions of Bcl2l10 during mouse preimplantation development using RT-qPCR and immunofluorescence and its biological function using siRNA and morpholino injection into pronuclear embryos. Results from RT-qPCR showed that Bcl2l10 was highly expressed in the metaphase Ⅱ-stage oocytes and pronuclear-stage embryos, but expression markedly decreased from the two-cell stage onwards and was no longer detected at the four-cell stage and beyond. Immunofluorescence staining showed that BCL2L10 was detectable throughout preimplantation development and localized in the cytoplasm and nuclei. Knocking down Bcl2l10 resulted in a reduced blastocyst formation rate (P < 0.01) and decreased expression of OCT4, NANOG, and SOX17 (P < 0.05). We concluded that the role of BCL2L10 is strongly associated with developmental competence of preimplantation mouse embryos.
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Affiliation(s)
- Yong Liu
- Anhui Province Key Laboratory of Embryo Development and Reproductive Regulation, Anhui Province Key Laboratory of Environmental Hormone and Reproduction, College of Biological and Food Engineering, Fuyang Normal University, Fuyang, 236037, China; Department of Veterinary and Animal Sciences, Animal Models Core Facility, Institute for Applied Life Sciences (IALS), University of Massachusetts Amherst, Amherst, MA, 01002, United States
| | - Jing Xin
- Anhui Province Key Laboratory of Embryo Development and Reproductive Regulation, Anhui Province Key Laboratory of Environmental Hormone and Reproduction, College of Biological and Food Engineering, Fuyang Normal University, Fuyang, 236037, China
| | - Shengnan Zhang
- Anhui Province Key Laboratory of Embryo Development and Reproductive Regulation, Anhui Province Key Laboratory of Environmental Hormone and Reproduction, College of Biological and Food Engineering, Fuyang Normal University, Fuyang, 236037, China
| | - Qingmei Li
- Anhui Province Key Laboratory of Embryo Development and Reproductive Regulation, Anhui Province Key Laboratory of Environmental Hormone and Reproduction, College of Biological and Food Engineering, Fuyang Normal University, Fuyang, 236037, China
| | - Wenying Wang
- Anhui Province Key Laboratory of Embryo Development and Reproductive Regulation, Anhui Province Key Laboratory of Environmental Hormone and Reproduction, College of Biological and Food Engineering, Fuyang Normal University, Fuyang, 236037, China
| | - Ji Chen
- Anhui Province Key Laboratory of Embryo Development and Reproductive Regulation, Anhui Province Key Laboratory of Environmental Hormone and Reproduction, College of Biological and Food Engineering, Fuyang Normal University, Fuyang, 236037, China
| | - Xin Ming
- Anhui Province Key Laboratory of Embryo Development and Reproductive Regulation, Anhui Province Key Laboratory of Environmental Hormone and Reproduction, College of Biological and Food Engineering, Fuyang Normal University, Fuyang, 236037, China
| | - Xiaoqing Wu
- Anhui Province Key Laboratory of Embryo Development and Reproductive Regulation, Anhui Province Key Laboratory of Environmental Hormone and Reproduction, College of Biological and Food Engineering, Fuyang Normal University, Fuyang, 236037, China
| | - Xinyan Cao
- Institute of Special Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, No.4899 Juye Street, Jingyue District, Changchun, 130112, China
| | - Wei Cui
- Department of Veterinary and Animal Sciences, Animal Models Core Facility, Institute for Applied Life Sciences (IALS), University of Massachusetts Amherst, Amherst, MA, 01002, United States
| | - Hongcheng Wang
- Anhui Province Key Laboratory of Embryo Development and Reproductive Regulation, Anhui Province Key Laboratory of Environmental Hormone and Reproduction, College of Biological and Food Engineering, Fuyang Normal University, Fuyang, 236037, China; Linquan Modern Agricultural Technology Cooperation and Extension Service Center, The Anhui Agricultural University's Comprehensive Experimental Station in the Northwest of Anhui Province, Linquan, Anhui, 236400, China.
| | - Wenyong Li
- Anhui Province Key Laboratory of Embryo Development and Reproductive Regulation, Anhui Province Key Laboratory of Environmental Hormone and Reproduction, College of Biological and Food Engineering, Fuyang Normal University, Fuyang, 236037, China.
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Kang HG, Jeong PS, Kim MJ, Joo YE, Gwon MA, Jeon SB, Song BS, Kim SU, Lee S, Sim BW. Arsenic exposure during porcine oocyte maturation negatively affects embryonic development by triggering oxidative stress-induced mitochondrial dysfunction and apoptosis. Toxicology 2022; 480:153314. [PMID: 36084880 DOI: 10.1016/j.tox.2022.153314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 08/16/2022] [Accepted: 09/04/2022] [Indexed: 11/15/2022]
Abstract
Arsenic (AS), an environmental contaminant, is a known human carcinogen that can cause cancer of the lung, liver, and skin. Furthermore, AS induces oxidative stress and mitochondrial impairments in mammalian cells. However, limited information is available on the effect of AS exposure on oocyte maturation of porcine, whose anatomy, physiology, and metabolism are similar to those of human. Therefore, we examined the effect of AS exposure on the in vitro maturation (IVM) of porcine oocytes and the possible underlying mechanisms. Cumulus-cell enclosed oocytes were cultured with or without AS for maturation, and then were used for analyses. This study indicated that AS under a concentration of 1 μM significantly increased the abnormal expansion of cumulus cells and the number of oocytes maintained in meiotic arrest. In addition, AS exposure significantly reduced subsequent development of embryos and increased the rate of apoptosis of blastocysts following parthenogenetic activation (PA) and in vitro fertilization (IVF). Moreover, AS exposure induced oxidative stress with increased reactive oxygen species (ROS), and decreased glutathione (GSH), leading to reduced mitochondrial membrane potential, mitochondrial quantity, DNA damage, excessive autophagy activity, and early apoptosis in porcine oocytes. Taken together, the results demonstrated that AS exposure exerts several negative effects, such as meiotic defects and embryo developmental arrest by causing mitochondrial dysfunction and apoptosis via inducing oxidative stress.
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Affiliation(s)
- Hyo-Gu Kang
- Futuristic Animal Resource & Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do 28116, South Korea; Laboratory of Animal Reproduction and Physiology, Department of Animal Science and Biotechnology, College of Agriculture and Life Science, Chungnam National University, Daejeon 34134, Korea
| | - Pil-Soo Jeong
- Futuristic Animal Resource & Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do 28116, South Korea
| | - Min Ju Kim
- Futuristic Animal Resource & Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do 28116, South Korea
| | - Ye Eun Joo
- Futuristic Animal Resource & Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do 28116, South Korea
| | - Min-Ah Gwon
- Futuristic Animal Resource & Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do 28116, South Korea
| | - Se-Been Jeon
- Futuristic Animal Resource & Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do 28116, South Korea
| | - Bong-Seok Song
- Futuristic Animal Resource & Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do 28116, South Korea
| | - Sun-Uk Kim
- Futuristic Animal Resource & Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do 28116, South Korea; Department of Functional Genomics, KRIBB School of Bioscience, Korea University of Science and Technology (UST), Daejeon 34113, South Korea
| | - Sanghoon Lee
- Futuristic Animal Resource & Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do 28116, South Korea; Laboratory of Theriogenology, College of Veterinary Medicine, Chungnam National University, Daejeon 34134, South Korea.
| | - Bo-Woong Sim
- Futuristic Animal Resource & Research Center, Korea Research Institute of Bioscience and Biotechnology, Chungcheongbuk-do 28116, South Korea.
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Yueh WT, Singh VP, Gerton JL. Maternal Smc3 protects the integrity of the zygotic genome through DNA replication and mitosis. Development 2021; 148:dev199800. [PMID: 34935904 PMCID: PMC8722392 DOI: 10.1242/dev.199800] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 11/22/2021] [Indexed: 01/10/2023]
Abstract
Aneuploidy is frequently observed in oocytes and early embryos, begging the question of how genome integrity is monitored and preserved during this crucial period. SMC3 is a subunit of the cohesin complex that supports genome integrity, but its role in maintaining the genome during this window of mammalian development is unknown. We discovered that, although depletion of Smc3 following meiotic S phase in mouse oocytes allowed accurate meiotic chromosome segregation, adult females were infertile. We provide evidence that DNA lesions accumulated following S phase in SMC3-deficient zygotes, followed by mitosis with lagging chromosomes, elongated spindles, micronuclei, and arrest at the two-cell stage. Remarkably, although centromeric cohesion was defective, the dosage of SMC3 was sufficient to enable embryogenesis in juvenile mutant females. Our findings suggest that, despite previous reports of aneuploidy in early embryos, chromosome missegregation in zygotes halts embryogenesis at the two-cell stage. Smc3 is a maternal gene with essential functions in the repair of spontaneous damage associated with DNA replication and subsequent chromosome segregation in zygotes, making cohesin a key protector of the zygotic genome.
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Affiliation(s)
- Wei-Ting Yueh
- Stowers Institute for Medical Research, Kansas City, MO 64110, USA
| | | | - Jennifer L. Gerton
- Stowers Institute for Medical Research, Kansas City, MO 64110, USA
- Department of Biochemistry and Molecular Biology, University of Kansas Medical Center, Kansas City, KS 66160, USA
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Yang Q, Zhu L, Wang M, Huang B, Li Z, Hu J, Xi Q, Liu J, Jin L. Analysis of maturation dynamics and developmental competence of in vitro matured oocytes under time-lapse monitoring. Reprod Biol Endocrinol 2021; 19:183. [PMID: 34893069 PMCID: PMC8662918 DOI: 10.1186/s12958-021-00868-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Accepted: 11/29/2021] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND To improve the developmental competence of in vitro cultured oocytes, extensive literature focused on maturation rate improvement with different additives in culture medium, while studies investigating the maturation dynamics of oocytes during in vitro maturation (IVM) and the influencing factors on oocyte viability are scarce. METHODS The study involved a retrospective observation by time-lapse monitoring of the IVM process of 157 donated GV oocytes from 59 infertile couples receiving ICSI in 2019, in Tongji Hospital, Wuhan, China. The GV oocytes derived from controlled ovarian hyperstimulation (COH) cycles underwent rescue IVM (R-IVM), and the maturation dynamics, including GVBD time (GV-MI), time from GVBD to maturation (MI-MII), maturation time (GV-MII), and MII arrest duration (MII-ICSI), were recorded by time-lapse monitoring. The matured oocytes were inseminated at different MII arrest points and subsequent embryo developments were assessed. The effects of baseline clinical characteristics, oocyte diameters, and maturation dynamics on the developmental competence of the oocytes were also analyzed. RESULTS Totally, 157 GV oocytes were collected. GVBD happened in 111 oocytes, with a median GV-MI duration of 3.7 h. The median MI-MII duration was 15.6 h and the median GV-MII duration was 19.5 h. The maturation rate reached 56.7% at 24 h and 66.9% at 48 h, and the clinical factors, including patient age, FSH level, AMH level, ovarian stimulation protocol, and serum estradiol and progesterone levels on hCG trigger day, showed no effects on the 24-h maturation rate. The normal fertilization rate of oocytes resuming meiosis within 8 h and matured within 24 h was significantly higher than that of oocytes resuming meiosis after 8 h and matured after 24 h. Furthermore, among those oocytes matured within 24 h, the high-quality embryo formation rate of oocytes resuming meiosis within 4.5 h and matured within 19 h was significantly higher. All stated time was measured from the start point of IVM. Additionally, for oocytes from patients with serum progesterone levels less than 1 ng/ml on hCG trigger day, the high-quality embryo formation rate was significantly increased. CONCLUSION R-IVM technology could increase the available embryos for patients in routine COH cycles, but excessive culture beyond 24 h is not recommended. GV-MI duration of the oocyte, recorded by time-lapse system, and serum progesterone levels of patients on hCG trigger day can significantly affect the developmental potential of the IVM oocytes.
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Affiliation(s)
- Qiyu Yang
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, No.1095, Jiefang Road, Wuhan, 430030, China
| | - Lixia Zhu
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, No.1095, Jiefang Road, Wuhan, 430030, China
| | - Meng Wang
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, No.1095, Jiefang Road, Wuhan, 430030, China
| | - Bo Huang
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, No.1095, Jiefang Road, Wuhan, 430030, China
| | - Zhou Li
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, No.1095, Jiefang Road, Wuhan, 430030, China
| | - Juan Hu
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, No.1095, Jiefang Road, Wuhan, 430030, China
| | - Qingsong Xi
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, No.1095, Jiefang Road, Wuhan, 430030, China.
| | - Jing Liu
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, No.1095, Jiefang Road, Wuhan, 430030, China.
| | - Lei Jin
- Reproductive Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, No.1095, Jiefang Road, Wuhan, 430030, China.
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11
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Abstract
Mammalian ovaries contain a large number of immature follicles. Follicular culture can contribute to the production of fertile oocytes from latent immature follicles, providing a useful
tool for exploring the developmental competencies and related factors that oocytes acquire during growth. However, the potential of oocytes produced by follicular culture is limited. Herein,
the optimal follicular culture conditions for the addition of polyvinylpyrrolidone to the medium and oxygen concentration were investigated. Polyvinylpyrrolidone with a high molecular weight
(≥ 360,000) and a 7% oxygen concentration were found to increase the blastocyst formation rate by more than 20% compared with conventional culture conditions. Although the developmental
ability of oocytes produced by follicular culture remained inferior to that of in vivo-derived oocytes, these findings may pave the way for enhanced production of fertile
oocytes in vitro and for studying the process of full developmental potency acquisition by oocytes.
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Affiliation(s)
- Saya Ota
- Department of Bioscience, Tokyo University of Agriculture, Tokyo 156-8502, Japan
| | - Shinya Ikeda
- Department of Bioscience, Tokyo University of Agriculture, Tokyo 156-8502, Japan
| | - Tomoya Takashima
- Department of Bioscience, Tokyo University of Agriculture, Tokyo 156-8502, Japan
| | - Yayoi Obata
- Department of Bioscience, Tokyo University of Agriculture, Tokyo 156-8502, Japan
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12
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Suresh A, Shukla MK, Kumar D, Shrivastava OP, Verma N. Simulated physiological oocyte maturation (SPOM) improves developmental competence of in vitro produced goat embryos. Theriogenology 2021; 172:193-199. [PMID: 34246165 DOI: 10.1016/j.theriogenology.2021.06.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 06/02/2021] [Accepted: 06/03/2021] [Indexed: 01/01/2023]
Abstract
The effect of simulated physiological oocyte maturation on the developmental competence, reactive oxygen species production and apoptosis rate of in vitro produced goat embryos were studied in the present experiment. Oocytes and spermatozoa were recovered from ovaries and epididymis, respectively, procured from a local small animal abattoir. The oocytes aspirated from the ovaries were allocated into two groups, control (subjected to routine in vitro maturation, fertilization and culture) and simulated physiological oocyte maturation (SPOM) group (subjected to prematuration, followed by routine in vitro maturation, fertilization and culture). The SPOM group showed a significantly (p < 0.05) higher maturation and blastocyst rates (90.60 ± 0.46% and 29.09 ± 2.59%, respectively) as compared to the control group (85.29 ± 0.98% and 24.09 ± 1.08%). The intensity of reactive oxygen species of the embryos in the control group (14.98 ± 0.83 pixels/embryo) was significantly (p < 0.05) higher than the SPOM group (9.60 ± 0.76 pixels/embryo). The apoptosis rate was also significantly (p < 0.05) higher in the embryos of the control group (9.18 ± 1.07%) as compared to the SPOM group (5.71 ± 0.90%). In conclusion, the simulated physiological oocyte maturation system significantly increases the developmental competence of the oocytes and decreases the intensity of reactive oxygen species and embryonic apoptosis in abattoir derived goat embryos.
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Affiliation(s)
- Ashitha Suresh
- Department of Veterinary Gynaecology and Obstetrics, College of Veterinary Science and Animal Husbandry, Jabalpur, Madhya Pradesh, India; Department of Veterinary Gynaecology and Obstetrics, Madras Veterinary College, Chennai, Tamil Nadu, India
| | - M K Shukla
- Department of Veterinary Gynaecology and Obstetrics, College of Veterinary Science and Animal Husbandry, Jabalpur, Madhya Pradesh, India; Department of Veterinary Gynaecology & Obstetrics, College of Veterinary and Animal Science, Sardar Vallabhbhai Patel University of Agriculture & Technology, Meerut, 250110, Uttar Pradesh, India.
| | - Dharmendra Kumar
- Animal Biotechnology Centre, Nanaji Deshmukh Veterinary Science University, Adhartaal, Jabalpur, 482004, Madhya Pradesh, India
| | - O P Shrivastava
- Department of Veterinary Gynaecology and Obstetrics, College of Veterinary Science and Animal Husbandry, Jabalpur, Madhya Pradesh, India
| | - Neeraj Verma
- Department of Veterinary Gynaecology and Obstetrics, College of Veterinary Science and Animal Husbandry, Jabalpur, Madhya Pradesh, India
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13
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Liu C, Su K, Chen L, Zhao Z, Wang X, Yuan C, Liang Y, Ji H, Li C, Zhou X. Prediction of oocyte quality using mRNA transcripts screened by RNA sequencing of human granulosa cells. Reprod Biomed Online 2021; 43:413-420. [PMID: 34400084 DOI: 10.1016/j.rbmo.2021.05.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 05/06/2021] [Accepted: 05/20/2021] [Indexed: 01/17/2023]
Abstract
RESEARCH QUESTION Can RNA transcripts of granulosa cells be used to assess oocyte quality? The possibility of predicting the developmental competence of oocytes by RNA sequencing analysis of granulosa cells was evaluated. DESIGN Granulosa cell samples were collected from 29 women undergoing assisted reproductive technology treatment and divided into two groups: 14 samples from the high blastocyst rate group and 15 from the low blastocyst rate group. Ten samples from each group were selected for RNA sequencing. RESULTS A total of 129 differentially expressed genes associated with high developmental competence of oocytes were identified. COL1A2, renin and COL1A1 were selected and further examined by quantitative real-time polymerase chain reaction (qRT-PCR). Expression levels of COL1A2 and renin by qRT-PCR were consistent with the results of RNA sequencing. CONCLUSION RNA sequencing data could provide novel marker genes for the non-invasive evaluation of oocyte quality and embryo developmental competence.
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Affiliation(s)
- Chengjun Liu
- College of Animal Sciences, Jilin University, Changchun 130062, China; Beijing Dairy Cattle Center, Beijing 100192, China; Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100095, China
| | - Ketong Su
- Reproductive Medical Center, Zhanjiang Jiuhe Hospital, Zhanjiang 524094, China
| | - Lu Chen
- College of Animal Sciences, Jilin University, Changchun 130062, China
| | - Zijiao Zhao
- College of Animal Sciences, Jilin University, Changchun 130062, China
| | - Xin Wang
- College of Animal Sciences, Jilin University, Changchun 130062, China
| | - Chenfeng Yuan
- College of Animal Sciences, Jilin University, Changchun 130062, China
| | - Yuqi Liang
- Reproductive Medical Center, Zhanjiang Jiuhe Hospital, Zhanjiang 524094, China
| | - Huili Ji
- Reproductive Medical Center, Zhanjiang Jiuhe Hospital, Zhanjiang 524094, China
| | - Chunjin Li
- College of Animal Sciences, Jilin University, Changchun 130062, China.
| | - Xu Zhou
- College of Animal Sciences, Jilin University, Changchun 130062, China.
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14
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Azari-Dolatabad N, Raes A, Pavani KC, Asaadi A, Angel-Velez D, Van Damme P, Leroy JLMR, Van Soom A, Pascottini OB. Follicular fluid during individual oocyte maturation enhances cumulus expansion and improves embryo development and quality in a dose-specific manner. Theriogenology 2021; 166:38-45. [PMID: 33684781 DOI: 10.1016/j.theriogenology.2021.02.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 01/30/2021] [Accepted: 02/22/2021] [Indexed: 11/19/2022]
Abstract
We evaluated the effect of supplementation of different concentrations of bovine follicular fluid (FF) during in vitro maturation (IVM) on oocyte development and blastocyst quality in group and individual culture conditions. To do so, in vitro maturation medium (TCM-199 with 20 ng/mL epidermal growth factor and 50 μg/mL gentamycin) was supplemented with 0 (control), 1, 5, or 10% of FF. Follicular fluid was collected from slaughterhouse-derived ovaries, selecting follicles between 12 and 20 mm in diameter. Oocytes were either produced in groups or individually matured, fertilized, and cultured to the blastocyst stage, allowing for separate follow-up of each oocyte. Development (cleavage and blastocyst rates) among experimental groups were fitted in mixed-effects models, and blastocyst quality parameters (assessed via differential apoptotic staining) were evaluated in mixed linear regression models. We also assessed the cumulus expansion (prior and after maturation) for individual culture conditions, and their difference was fitted in mixed linear regression models. The FF was collected from two batches, with an estradiol/progesterone ratio higher than 1. The FF batch did not affect the development or blastocyst quality in group or individual culture conditions (P > 0.05). In group culture, development was similar among experimental groups (P > 0.05). Five or 10% of FF supplementation improved (P ˂ 0.05) aspects of blastocyst quality such as total cell numbers (TCN), trophectoderm (TE), inner cell mass (ICM), and ICM/TCN and apoptotic cells/TCN ratio in comparison to control. In the individual culture system, 5% FF supplementation increased (P ˂ 0.05) day 8 blastocyst rate (33 ± 3.4% (LSM ± SE)) in comparison to control (20 ± 2.7%) and 1% FF supplementation (19 ± 2.6%) but it was not different (P > 0.05) from 10% FF supplementation (28 ± 3.4%). Five percent of FF supplementation resulted in greater TCN, ICM, and ICM/TCN than control (P ˂ 0.05). It also resulted in a greater expansion of cumulus cell investment than the other groups (P ˂ 0.05), with a 3-fold increase compared to control. In conclusion, 5% of FF supplementation during IVM improved the cumulus expansion and the blastocyst development and quality in an individual culture system. However, FF supplementation during maturation in a group culture system did not increase development, but it modestly improved some embryo quality aspects when 5 or 10% of FF was added.
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Affiliation(s)
- Nima Azari-Dolatabad
- Department of Reproduction, Obstetrics and Herd Health, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium.
| | - Annelies Raes
- Department of Reproduction, Obstetrics and Herd Health, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Krishna Chaitanya Pavani
- Department of Reproduction, Obstetrics and Herd Health, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Anise Asaadi
- Department of Reproduction, Obstetrics and Herd Health, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium; Department of Animal Reproduction, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
| | - Daniel Angel-Velez
- Department of Reproduction, Obstetrics and Herd Health, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium; Research Group in Animal Sciences - INCA-CES, School of Veterinary Medicine and Animal Production, Universidad CES, Medellin, Colombia
| | - Petra Van Damme
- Department of Reproduction, Obstetrics and Herd Health, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Jo L M R Leroy
- Department of Veterinary Sciences, Gamete Research Center, Veterinary Physiology and Biochemistry, University of Antwerp, Wilrijk, Belgium
| | - Ann Van Soom
- Department of Reproduction, Obstetrics and Herd Health, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Osvaldo Bogado Pascottini
- Department of Reproduction, Obstetrics and Herd Health, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium; Department of Veterinary Sciences, Gamete Research Center, Veterinary Physiology and Biochemistry, University of Antwerp, Wilrijk, Belgium.
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15
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Bezerra FTG, Dau AMP, Van Den Hurk R, Silva JRV. Molecular characteristics of oocytes and somatic cells of follicles at different sizes that influence in vitro oocyte maturation and embryo production. Domest Anim Endocrinol 2021; 74:106485. [PMID: 32858464 DOI: 10.1016/j.domaniend.2020.106485] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Revised: 04/11/2020] [Accepted: 04/14/2020] [Indexed: 11/18/2022]
Abstract
During the last 10 to 15 yr, in vitro research to predict antral follicle growth and oocyte maturation has delivered interesting advances in the knowledge of processes regulating follicle growth and developmental competence of oocytes. This review discusses the contribution of cumulus and mural granulosa cells in the process of oocyte maturation and cumulus expansion in cumulus-oocyte complexes (COCs) from follicles of different sizes and shows that differences in gene expression in oocytes, granulosa, and theca cells of small and large follicles impact the success of in vitro blastocyst development. In addition, the molecular mechanisms by which COC metabolism and antioxidant defense provide oocyte competence are highlighted. Furthermore, new insights and perspectives on molecular and cellular regulation of in vitro oocyte maturation are emphasized.
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Affiliation(s)
- F T G Bezerra
- Laboratory of Biotechnology and Physiology of Reproduction (LABIREP), Graduation School of Biotechnology, Federal University of Ceara, Campus of Sobral, Sobral, Ceará, Brazil
| | - A M P Dau
- Federal Institute of Education, Science and Technology of Rio Grande do Sul, Rolante, Rio Grande do Sul, Brazil
| | - R Van Den Hurk
- Department of Pathobiology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, the Netherlands
| | - J R V Silva
- Laboratory of Biotechnology and Physiology of Reproduction (LABIREP), Graduation School of Biotechnology, Federal University of Ceara, Campus of Sobral, Sobral, Ceará, Brazil.
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16
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Zhang ZY, Yu XL, Cai MD, Liu YH, Liu JQ, Zhao SY, Li XX, Li YH. Relationship between bovine oocytes developmental competence and mRNA expression of apoptotic and mitochondrial genes following the change of vitrification temperatures and cryoprotectant concentrations. Cryobiology 2020; 97:110-122. [PMID: 33011172 DOI: 10.1016/j.cryobiol.2020.09.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 09/28/2020] [Accepted: 09/29/2020] [Indexed: 02/09/2023]
Abstract
The present study analyzed the relationship between bovine oocytes developmental competence and mRNA expression of apoptotic and mitochondrial genes following the change of vitrification temperatures (VTs) and cryoprotectant agent concentrations (CPAs). Cumulus oocyte complexes were randomly divided into five groups: control, vitrified in liquid nitrogen (LN; -196 °C) with 5.6 M CPAs (LN 5.6 M), LN with 6.6 M CPAs (LN 6.6 M), liquid helium (LHe; -269 °C) with 5.6 M CPAs (LHe 5.6 M), and LHe with 6.6 M CPAs (LHe 6.6 M). After vitrification and warming, oocytes of vitrified and control groups were subjected to in vitro maturation (IVM), in vitro fertilization and in vitro culture. The blastocyst rate in LHe 5.6 M group was the highest among the four vitrified groups (13.7% vs. 9.4%, 1.3%, and 8.4%; P < 0.05). The mRNA expression level of 8 apoptotic- and 12 mitochondria-related genes were detected through qRT-PCR after IVM. Lower VT (LHe, -269 °C) positively affected the mRNA expression levels of apoptotic genes (BAD, BID, BTK, TP53, and TP53I3) and mitochondrial genes (COX6B1, DERA, FIS1, NDUFA1, NDUFA4, PRDX2, SLC25A5, TFB1M, and UQCRB), and reduced oxidative stress from freezing. Decreased CPAs (5.6 M) positively affected mRNA expression levels of apoptotic genes (BAD, BCL2A1, BID, and CASP3) in LHe vitrification but negatively affected apoptotic genes (BAD, BAX, BID, BTK, and BCL2A1) in LN vitrification. In conclusion, decreased VTs and CPAs in LHe vitrification may increase the blastocyst rate by changing the mRNA expression levels of these apoptotic and mitochondrial genes for the vitrified oocytes.
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Affiliation(s)
- Zhi Yang Zhang
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, 471023, China; Henan Provincial Key Laboratory for Grass-Feeding Animal, Henan University of Science and Technology, Luoyang, 471023, China
| | - Xue Li Yu
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, 471023, China; Henan Provincial Key Laboratory for Grass-Feeding Animal, Henan University of Science and Technology, Luoyang, 471023, China.
| | - Meng Dan Cai
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, 471023, China; Henan Provincial Key Laboratory for Grass-Feeding Animal, Henan University of Science and Technology, Luoyang, 471023, China
| | - Yi Heng Liu
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, 471023, China; Henan Provincial Key Laboratory for Grass-Feeding Animal, Henan University of Science and Technology, Luoyang, 471023, China
| | - Jia Qi Liu
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, 471023, China; Henan Provincial Key Laboratory for Grass-Feeding Animal, Henan University of Science and Technology, Luoyang, 471023, China
| | - Shi Yu Zhao
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, 471023, China; Henan Provincial Key Laboratory for Grass-Feeding Animal, Henan University of Science and Technology, Luoyang, 471023, China
| | - Xiao Xia Li
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, 471023, China; Henan Provincial Key Laboratory for Grass-Feeding Animal, Henan University of Science and Technology, Luoyang, 471023, China
| | - Ying Hua Li
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, 471023, China; Henan Provincial Key Laboratory for Grass-Feeding Animal, Henan University of Science and Technology, Luoyang, 471023, China
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17
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Li R, Luo Y, Xu J, Sun Y, Ma Z, Chen S. Effects of oxygen concentrations on developmental competence and transcriptomic profile of yak oocytes. ZYGOTE 2020; 28:459-69. [PMID: 32772955 DOI: 10.1017/S0967199420000337] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Oxygen concentration influences oocyte quality and subsequent embryo development, but it remains unclear whether oxygen concentrations affect the developmental competence and transcriptomic profile of yak oocytes. In this study, we investigated the effects of different oxygen concentrations (5% versus 20%) on the developmental competence, reactive oxygen species (ROS) levels, glutathione (GSH) content, and transcriptomic profile of yak oocytes. The results showed that a low oxygen concentration significantly increased the maturation rate of yak oocytes (81.2 ± 2.2% vs 75.9 ± 1.3%) and the blastocyst quality of yak in vitro fertilized embryos. Analysis of ROS and GSH showed that a low oxygen concentration reduced ROS levels and increased the content of GSH (75.05 ± 7.1 ng/oocyte vs 50.63 ± 5.6 ng/oocyte). Furthermore, transcriptomic analysis identified 120 differentially expressed genes (DEGs) between the two groups of oocytes. Gene enrichment analysis of the DEGs indicated multiple cellular processes, including oxidative phosphorylation, transcription regulation, mitochondrial regulation, oestrogen signalling pathway, HIF-1 signalling pathway, TNF signalling pathway, were involved in the response to oxygen concentration alterations. Taken together, these results indicated that a low oxygen concentration improved the developmental competence of yak oocytes.
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18
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Khurchabilig A, Sato A, Ashibe S, Hara A, Fukumori R, Nagao Y. Expression levels of FSHR, IGF1R, CYP11al and HSD3β in cumulus cells can predict in vitro developmental competence of bovine oocytes. ZYGOTE 2020; 28:1-7. [PMID: 32482188 DOI: 10.1017/s0967199420000283] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The efficiency of in vitro embryo production technologies would be improved by the development of suitable non-invasive biomarkers that allow the selection of good quality cumulus-oocyte complexes (COCs). The present study used whole, single oocyte culture to investigate whether the expression levels of follicle-stimulating hormone receptor (FSHR), insulin-like factor 1 receptor (IGF1R) and three steroidogenesis-related enzymes (CYP11al, CYP19al and HSD3β) in cumulus cells reflected the developmental competence of COCs. Cumulus cells were collected from single COCs before maturation culture and relative mRNA levels were assessed using real-time PCR. The analysis indicated that mRNAs for FSHR, IGF1R, CYP11al and HSD3β were present at higher levels in cumulus cells from COCs that failed to form blastocysts compared with cumulus cells from COCs that formed blastocysts. Moreover, FSHR and IGF1R mRNA levels were positively correlated with those of genes for steroidogenesis-related enzymes. In conclusion, poor developmental competence of COCs was related to higher expression of FSHR, IGF1R, CYP11al and HSD3β in cumulus cells, which may indicate the advanced differentiation of cumulus cells into granulosa cells.
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Affiliation(s)
- Atchalalt Khurchabilig
- Department of Animal Production Science, United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Tokyo183-8509, Japan
- University Farm, Faculty of Agriculture, Utsunomiya University, Tochigi321-4415, Japan
| | - Akane Sato
- University Farm, Faculty of Agriculture, Utsunomiya University, Tochigi321-4415, Japan
| | - Shiori Ashibe
- Department of Animal Production Science, United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Tokyo183-8509, Japan
- University Farm, Faculty of Agriculture, Utsunomiya University, Tochigi321-4415, Japan
| | - Asuka Hara
- University Farm, Faculty of Agriculture, Utsunomiya University, Tochigi321-4415, Japan
| | - Rika Fukumori
- University Farm, Faculty of Agriculture, Utsunomiya University, Tochigi321-4415, Japan
| | - Yoshikazu Nagao
- Department of Animal Production Science, United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Tokyo183-8509, Japan
- University Farm, Faculty of Agriculture, Utsunomiya University, Tochigi321-4415, Japan
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19
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Argudo DE, Tenemaza MA, Merchán SL, Balvoa JA, Méndez MS, Soria ME, Galarza LR, Ayala LE, Hernández-Fonseca HJ, Perea MS, Perea FP. Intraovarian influence of bovine corpus luteum on oocyte morphometry and developmental competence, embryo production and cryotolerance. Theriogenology 2020; 155:232-239. [PMID: 32758994 DOI: 10.1016/j.theriogenology.2020.05.044] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 04/28/2020] [Accepted: 05/30/2020] [Indexed: 12/25/2022]
Abstract
Three experiments were conducted to determine influence of the bovine corpus luteum (CL) on morphometric and functional characteristics of oocytes, and subsequent embryonic development. Cumulus-oocyte complexes were aspirated from two types of cows: 1) with a CL in one ovary (CL+) and without a CL in the contralateral ovary (CL-), 2) and from cows without CL in either ovary (C). Intracellular activity of the enzyme glucose-6-phosphate dehydrogenase (G6PDH), oocyte diameter and thickness of the zona pellucida were determined (Experiment 1). Then, the rate of in vitro oocyte maturation for each ovarian category was evaluated and oocyte diameter and zona pellucida thickness were measured after maturation (Experiment 2). In Experiment 3, in vitro embryo production and cryotolerance were assessed. The oocyte diameter was greater (P < 0.01) and the zona pellucida was thinner in CL+ than in CL- (P > 0.05) or C (P = 0.0131) ovaries. Activity of G6PDH was lower in oocytes from CL+ than CL- (P < 0.01) and C (P = 0.0148) ovaries. Rate of oocyte maturation, oocyte diameter and thickness of the zona pellucida after maturation did not differ among groups. Rate of cleavage was greater in zygotes from CL+ than from CL- or C (P < 0.01); and CL+ ovaries produced more total embryos on day 7 (P < 0.05) and more blastocysts (P < 0.01) than CL- and C ovaries. Rate of expansion and hatching of day-7 vitrified-warmed blastocysts at 24 and 48 h of culture did not differ among groups. In conclusion, oocytes collected from CL+ ovaries were larger and metabolically more prepared to continue maturation than those from ovaries lacking a CL. Also, rates of cleavage and yield of blastocysts were greater for oocytes from CL+ ovaries than from CL- and C ovaries. These findings indicate that a CL influenced oocyte developmental competence and embryonic development, presumably through intraovarian interactions.
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Affiliation(s)
- Daniel E Argudo
- Unidad Académica de Ciencias Agropecuarias, Universidad Católica de Cuenca, Ecuador
| | - Milton A Tenemaza
- Laboratorio de Biotecnologías de la Reproducción Animal, Facultad de Ciencias Agropecuarias. Universidad de Cuenca, Ecuador
| | - Shirley L Merchán
- Laboratorio de Biotecnologías de la Reproducción Animal, Facultad de Ciencias Agropecuarias. Universidad de Cuenca, Ecuador
| | - José A Balvoa
- Laboratorio de Biotecnologías de la Reproducción Animal, Facultad de Ciencias Agropecuarias. Universidad de Cuenca, Ecuador
| | - Maria S Méndez
- Laboratorio de Biotecnologías de la Reproducción Animal, Facultad de Ciencias Agropecuarias. Universidad de Cuenca, Ecuador
| | - Manuel E Soria
- Laboratorio de Biotecnologías de la Reproducción Animal, Facultad de Ciencias Agropecuarias. Universidad de Cuenca, Ecuador
| | - Luis R Galarza
- Laboratorio de Biotecnologías de la Reproducción Animal, Facultad de Ciencias Agropecuarias. Universidad de Cuenca, Ecuador
| | - Luis E Ayala
- Laboratorio de Biotecnologías de la Reproducción Animal, Facultad de Ciencias Agropecuarias. Universidad de Cuenca, Ecuador
| | | | - Mariana S Perea
- Facultad de Ciencias Veterinarias, Universidad del Zulia, Venezuela
| | - Fernando P Perea
- Departamento de Ciencias Agrarias, Universidad de Los Andes, Trujillo, Venezuela.
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Ghanem N, Salilew-Wondim D, Hoelker M, Schellander K, Tesfaye D. Transcriptome profile and association study revealed STAT3 gene as a potential quality marker of bovine gametes. ZYGOTE 2020; 28:1-15. [PMID: 31928565 DOI: 10.1017/s0967199419000765] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The present study was aimed to investigate differences in molecular signatures in oocytes derived from Holstein-Friesian heifers with different genetic merit for fertility, euthanized during day 0 or day 12 of the estrous cycle. Moreover, association between single nucleotide polymorphisms (SNPs) of ODC1 and STAT3 genes and bull fertility traits was investigated. The gene expression patterns were analyzed using cDNA array and validated with quantitative real-time polymerase chain reaction (PCR). The result revealed that several genes have shown not only to be regulated by fertility merit but also by the day of oocyte recovery during the estrous cycle. The STAT3 gene was found to be upregulated in oocytes recovered from animals with high fertility merit at both day 0 and day 12. Some other genes like PTTG1, ODC1 and TUBA1C were downregulated at day 0 and upregulated at day 12 in high, compared with low, fertility merit recovered oocytes. In contrast, the transcript abundance of TPM3 was upregulated at day 0 and downregulated at day 12 in high, compared with low, fertility merit recovered oocytes. In addition, ODC1 and STAT3 were found to be associated (P < 0.05) with sperm quality traits as well as flow cytometry parameters. Therefore, the expression of several candidate genes including ODC1 and STAT3 was related to the genetic merit of the cow. In addition polymorphisms in these two genes were found to be associated with bull semen quality.
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Affiliation(s)
- Nasser Ghanem
- Animal Production Department, Faculty of Agriculture, Cairo University, Giza, Egypt
| | - Dessie Salilew-Wondim
- Institute of Animal Science, Animal Breeding and Husbandry Group, University of Bonn, 53115Bonn, Germany
| | - Michael Hoelker
- Institute of Animal Science, Animal Breeding and Husbandry Group, University of Bonn, 53115Bonn, Germany
| | - Karl Schellander
- Institute of Animal Science, Animal Breeding and Husbandry Group, University of Bonn, 53115Bonn, Germany
| | - Dawit Tesfaye
- Institute of Animal Science, Animal Breeding and Husbandry Group, University of Bonn, 53115Bonn, Germany
- Department of Biomedical Sciences, Animal Reproduction and Biotechnology Laboratory (ARBL), Colorado State University, Fort Collins, CO, USA
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Li J, Balboula AZ, Aboelenain M, Fujii T, Moriyasu S, Bai H, Kawahara M, Takahashi M. Effect of autophagy induction and cathepsin B inhibition on developmental competence of poor quality bovine oocytes. J Reprod Dev 2019; 66:83-91. [PMID: 31875588 PMCID: PMC7040212 DOI: 10.1262/jrd.2019-123] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The present study investigated the effect of autophagy induction and cathepsin B (CTSB) inhibition on developmental competence of poor quality oocytes. Bovine cumulus oocyte complexes
(COCs) were classified as good or poor according to their morphology. Autophagy activity was detected in good and poor germinal vesicle (GV) oocytes. Then E-64, a CTSB inhibitor, rapamycin
(Rapa), an autophagy inducer, and combined administration was achieved during in vitro maturation (IVM) of poor quality COCs followed by detection of autophagy activity. In
the next experiment, E-64, Rapa, and E64 + Rapa, were added during IVM to good and poor quality COCs followed by in vitro fertilization and culture for 8 days to investigate
whether inhibition of CTSB and/or induction of autophagy improve embryonic development and quality. Autophagy activity was significantly lower in poor quality GV oocytes than in good quality
ones. E-64, Rapa and E-64 + Rapa treatment during IVM significantly increased autophagy activity in poor quality oocytes. Addition of Rapa in good quality COCs did not increase the
blastocyst rate, whereas E-64 increased the blastocyst rate and total cell number (TCN) with decreasing TUNEL-positive cells. In contrast, Rapa treatment in poor quality COCs significantly
increased the blastocyst rate and TCN with decreasing TUNEL-positive cells. These results indicate oocyte quality has different responses to intracellular autophagy induction and CTSB
activity control by potential autophagy and catabolic status, however, synergetic effect of autophagy induction and CTSB inhibition can increase developmental competence of both good and
poor quality COCs, especially rescue effect in poor quality COCs.
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Affiliation(s)
- Jianye Li
- Laboratory of Animal Genetics and Reproduction, Department of Animal Science, Graduate School of Agriculture, Hokkaido University, Hokkaido 060-8589, Japan
| | - Ahmed Zaky Balboula
- Animal Sciences Research Center, College of Agriculture, Food & Natural Resources, University of Missouri, Columbia, MO 65211, USA.,Department of Theriogenology, Faculty of Veterinary Medicine, Mansoura University, Mansoura 35516, Egypt
| | - Mansour Aboelenain
- Department of Theriogenology, Faculty of Veterinary Medicine, Mansoura University, Mansoura 35516, Egypt.,Department of Genetics, Rutgers University, 145 Bevier Road, Piscataway, NJ 08854, USA
| | - Takashi Fujii
- Animal Research Center, Hokkaido Research Organization, Hokkaido 081-0038, Japan
| | - Satoru Moriyasu
- Animal Research Center, Hokkaido Research Organization, Hokkaido 081-0038, Japan
| | - Hanako Bai
- Laboratory of Animal Genetics and Reproduction, Department of Animal Science, Graduate School of Agriculture, Hokkaido University, Hokkaido 060-8589, Japan
| | - Manabu Kawahara
- Laboratory of Animal Genetics and Reproduction, Department of Animal Science, Graduate School of Agriculture, Hokkaido University, Hokkaido 060-8589, Japan
| | - Masashi Takahashi
- Research Faculty of Agriculture, Hokkaido University, Hokkaido 060-8589, Japan.,Global Institution for Collaborative Research and Education, Hokkaido University, Hokkaido 060-8589, Japan
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Kohata-Ono C, Wakai T, Funahashi H. The autophagic inducer and inhibitor display different activities on the meiotic and developmental competencies of porcine oocytes derived from small and medium follicles. J Reprod Dev 2019; 65:527-532. [PMID: 31685760 PMCID: PMC6923152 DOI: 10.1262/jrd.2019-112] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
This study aimed to examine the effect of rapamycin (autophagy inducer) and 3-methyladenine (3-MA, autophagy inhibitor) on the meiotic and developmental competencies of porcine oocytes derived from medium follicles (MF, 3-6 mm in diameter) and small follicles (SF, 1-2 mm in diameter) during in vitro maturation (IVM) process. The presence of 1 nM but not 10 nM rapamycin significantly increased the maturation rate of MF-derived oocytes (P < 0.05). However, the maturation rate of SF-derived oocytes was not affected by rapamycin at both concentrations (1 nM and 10 nM). The maturation rate of MF-derived oocytes decreased significantly (P < 0.05) in the presence of 0.2 mM but not 2 mM 3-MA than non-supplemented control. In contrast, in SF-derived oocytes, 3-MA at both 0.2 and 2 mM concentrations did not affect the maturation rates. The presence of 1 nM rapamycin significantly increased the blastocyst formation rate of MF-derived mature oocytes following parthenogenetic activation (P < 0.05). However, the blastocyst formation rate of SF-derived mature oocytes was not affected by the presence of rapamycin. The presence of 3-MA significantly reduced the blastocyst formation rate of MF-derived mature oocytes but did not change that of SF-derived oocytes. In conclusion, our study results show differences in activity of the autophagy inducer and inhibitor on the meiotic and developmental competencies of MF- and SF-derived porcine oocytes.
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Affiliation(s)
- Chiyuki Kohata-Ono
- Department of Animal Science, Graduate of Environmental and Life Science, Okayama University, Okayama 700-8530, Japan
| | - Takuya Wakai
- Department of Animal Science, Graduate of Environmental and Life Science, Okayama University, Okayama 700-8530, Japan
| | - Hiroaki Funahashi
- Department of Animal Science, Graduate of Environmental and Life Science, Okayama University, Okayama 700-8530, Japan
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Roth Z, Dvir A, Furman O, Lavon Y, Kalo D, Leitner G, Wolfenson D. Oocyte maturation in plasma or follicular fluid obtained from lipopolysaccharide-treated cows disrupts its developmental competence. Theriogenology 2019; 141:120-127. [PMID: 31536861 DOI: 10.1016/j.theriogenology.2019.09.021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 09/10/2019] [Accepted: 09/11/2019] [Indexed: 12/14/2022]
Abstract
Mastitis has deleterious effects on ovarian function and reproductive performance. We studied the association between plasma or follicular fluid (FF) obtained from endotoxin-induced mastitic cows, and oocyte developmental competence. Lactating Holstein cows were synchronized using the Ovsynch protocol. On Day 6 of the synchronized cycle, an additional PGF2α dose was administered, and either Escherichia coli endotoxin (LPS, 10 μg; n = 3 cows) or saline (n = 3 cows) was administered to one udder quarter per cow, 36 h later. Milk samples were collected and rectal temperatures recorded. Cows treated with LPS showed a typical transient increase in body temperature (40.3 °C ± 0.4), whereas cows treated with saline maintained normal body temperature (38.9 °C ± 0.04). A higher (P < 0.05) somatic cell count was recorded for cows treated with LPS. Plasma samples were collected and FF was aspirated from the preovulatory follicles by transvaginal ultrasound probe, 6 h after LPS administration. Radioimmunoassay was performed on plasma samples to determine estradiol and cortisol concentrations. Either FF or plasma was further used as maturation medium. In the first experiment, oocytes were matured in TCM-199 (Control) or in FF aspirated from cows treated with saline (FF-Saline) or LPS (FF-LPS). Cleavage rate to the 2- to 4-cell stage embryo did not differ among groups. However, the proportion of developed blastocysts on Day 7 postfertilization in the FF-LPS group tended to be lower for that in FF-Saline and was lower (P < 0.05) than that in the Control groups (10.6 vs. 22.4 and 24.4%, respectively). In the second experiment, oocytes were matured in TCM-199 (Control), or in plasma obtained from cows treated with saline (Plasma-Saline) or LPS (Plasma-LPS). Similar to the FF findings, cleavage rate did not differ among groups; however, the proportion of developing blastocysts tended to be lower in the Plasma-LPS group than in the Plasma-Saline group and was lower (P < 0.05) from that in the Control group (11.0 vs. 25.5 and 34.7%, respectively). The proportion of apoptotic cells per blastocyst, determined by TUNEL assay, did not differ among the experimental groups. The findings shed light on the mechanism by which mastitis induces a disruption in oocyte developmental competence. Further studies are required to clarify whether the negative effect on oocyte developmental competence is a result of LPS, by itself, or due to elevation of secondary inflammatory agents.
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Affiliation(s)
- Zvi Roth
- Department of Animal Sciences, Faculty of Agriculture, Food and Environment, The Hebrew University, Rehovot, 76100, Israel.
| | - Ayala Dvir
- Department of Animal Sciences, Faculty of Agriculture, Food and Environment, The Hebrew University, Rehovot, 76100, Israel
| | - Ori Furman
- Department of Animal Sciences, Faculty of Agriculture, Food and Environment, The Hebrew University, Rehovot, 76100, Israel
| | - Yaniv Lavon
- Department of Animal Sciences, Faculty of Agriculture, Food and Environment, The Hebrew University, Rehovot, 76100, Israel
| | - Dorit Kalo
- Department of Animal Sciences, Faculty of Agriculture, Food and Environment, The Hebrew University, Rehovot, 76100, Israel
| | - Gabriel Leitner
- Mastitis Laboratory, The Veterinary Institute, Bet Dagan 50250, Israel
| | - David Wolfenson
- Department of Animal Sciences, Faculty of Agriculture, Food and Environment, The Hebrew University, Rehovot, 76100, Israel
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24
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Cao Z, Gao D, Tong X, Xu T, Zhang D, Wang Y, Liu Y, Li Y, Zhang Y, Pu Y. Melatonin improves developmental competence of oocyte-granulosa cell complexes from porcine preantral follicles. Theriogenology 2019; 133:149-158. [PMID: 31100559 DOI: 10.1016/j.theriogenology.2019.05.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 04/27/2019] [Accepted: 05/01/2019] [Indexed: 01/08/2023]
Abstract
Melatonin has been reported to improve the survival rate of mouse and goat preantral follicles cultured in vitro. However, the role of melatonin in the development of oocyte-granulosa cell complexes (OGCs) isolated from preantral follicles remains unclear. Cumulus-oocyte complexes were isolated from OGCs cultured in vitro for 18.5 days and were then maturated in vitro for 42 h. The matured oocytes were parthenogenetically activated and were further cultured up to the blastocyst stage. We found that the developmental capacity of oocytes from in vitro cultured OGCs was significantly inferior to that from in vivo grown counterparts. Additionally, a 10-5 M dose of melatonin added to the medium during in vitro culture of OGCs did not improve oocyte meiotic maturation but enhanced blastocyst rate of parthenogenetically activated embryos. Besides, these beneficial effects could be reversed by luzindole treatment, a melatonin membrane receptor antagonist. mRNA sequencing analysis further revealed that melatonin caused differential expression of 76 genes of which 75 were upregulated and 1 was downregulated in OGCs. Twelve of the 76 genes were identified as potential regulators of metabolic pathways by functional analysis. Taken together, these results indicate that melatonin improves developmental competence of porcine oocyte-granulosa cell complexes.
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Affiliation(s)
- Zubing Cao
- Anhui Province Key Laboratory of Local Livestock and Poultry, Genetical Resource Conservation and Breeding, College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Di Gao
- Anhui Province Key Laboratory of Local Livestock and Poultry, Genetical Resource Conservation and Breeding, College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Xu Tong
- Anhui Province Key Laboratory of Local Livestock and Poultry, Genetical Resource Conservation and Breeding, College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Tengteng Xu
- Anhui Province Key Laboratory of Local Livestock and Poultry, Genetical Resource Conservation and Breeding, College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Dandan Zhang
- Anhui Province Key Laboratory of Local Livestock and Poultry, Genetical Resource Conservation and Breeding, College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Yiqing Wang
- Anhui Province Key Laboratory of Local Livestock and Poultry, Genetical Resource Conservation and Breeding, College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Ya Liu
- Anhui Province Key Laboratory of Local Livestock and Poultry, Genetical Resource Conservation and Breeding, College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Yunsheng Li
- Anhui Province Key Laboratory of Local Livestock and Poultry, Genetical Resource Conservation and Breeding, College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Yunhai Zhang
- Anhui Province Key Laboratory of Local Livestock and Poultry, Genetical Resource Conservation and Breeding, College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Yong Pu
- Anhui Province Key Laboratory of Local Livestock and Poultry, Genetical Resource Conservation and Breeding, College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China.
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Gaias LM, Lindstrom Johnson S, White RMB, Pettigrew J, Dumka L. Positive School Climate as a Moderator of Violence Exposure for Colombian Adolescents. Am J Community Psychol 2019; 63:17-31. [PMID: 30609076 DOI: 10.1002/ajcp.12300] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In Colombia, many adolescents have experienced violence related to the decades-long armed conflict in the country and have witnessed or been directly victimized by violence in their communities, often related to gang activity or drug trafficking. Exposure to violence, both political and community violence, has detrimental implications for adolescent development. This study used data from 1857 Colombian adolescents in an urban setting. We aim to understand the relations between exposure to violence and adolescent outcomes, both externalizing behaviors and developmental competence, and then to understand whether school climate (i.e., safety, connectedness, services) moderates these relations. Results demonstrate that armed conflict, community violence victimization, and witnessing community violence are positively associated with externalizing behaviors, but only armed conflict is negatively associated with developmental competence. School safety, connectedness, and services moderate the relation between community violence witnessing and externalizing behaviors. School services moderates the relation between community violence victimization and developmental competence. As students perceived more positive school climate, the effects of community violence exposure on outcomes were weakened. This study identifies potential levers for intervention regarding how schools can better support violence-affected youth through enhancements to school safety, connectedness, and services.
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Affiliation(s)
| | - Sarah Lindstrom Johnson
- T. Denny Sanford School of Social and Family Dynamics, Arizona State University, Tempe, AZ, USA
| | - Rebecca M B White
- T. Denny Sanford School of Social and Family Dynamics, Arizona State University, Tempe, AZ, USA
| | - Jonathan Pettigrew
- Hugh Downs School of Human Communication, Arizona State University, Tempe, AZ, USA
| | - Larry Dumka
- T. Denny Sanford School of Social and Family Dynamics, Arizona State University, Tempe, AZ, USA
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Zhenwei J, Xianhua Z. Pre-IVM treatment with C-type natriuretic peptide in the presence of cysteamine enhances bovine oocytes antioxidant defense ability and developmental competence in vitro. Iran J Vet Res 2019; 20:173-179. [PMID: 31656521 PMCID: PMC6811709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 09/15/2018] [Revised: 12/06/2018] [Accepted: 01/30/2019] [Indexed: 06/10/2023]
Abstract
BACKGROUND The use of C-type natriuretic peptide (CNP) combined with cysteamine during pre-in vitro maturation (IVM) can help establish an effective pre-IVM system. AIMS This study was designed to investigate the effects of CNP combined with cysteamine on meiotic maturation and developmental competence of bovine oocytes in vitro. METHODS Oocytes were cultured in pre-IVM medium supplemented with 100 nM CNP for 6 h in the absence or presence of 100 μM cysteamine, followed by standard IVM for 24 h. Oocytes matured by standard IVM for 24 h (no pre-IVM) were used as the control. The percentage of oocytes arrested at germinal vesicle (GV) stage in each treatment group was examined at 0 h of IVM, and the nuclear maturation rate was assessed by evaluating the percentages of oocytes that reached metaphase II (M II) stage at 24 h of IVM. After 24 h of IVM, oocytes were subjected to in vitro fertilization (IVF) and i n vitro embryo culture (IVC). Cleavage rates were assessed 48 h post-insemination. Blastocyst production rates were recorded on day 8 after IVF. In addition, intra-oocyte glutathione (GSH) and reactive oxygen species (ROS) content for each treatment were tested at 0 h and 24 h of IVM. RESULTS No differences were observed between the CNP pre-IVM treatment and control groups in the rate of bovine oocytes maturing to the M II stage, cleavage and blastocysts production rates after IVF, and intra-oocyte GSH levels. Notably, the presence of cysteamine during pre-IVM culture with CNP significantly improved the rate of embryos developed to the blastocyst stage after in vitro maturation and fertilization, moreover, it increased the levels of GSH and reduced the levels of ROS in bovine oocytes. CONCLUSION The improvement to IVM bovine oocyte developmental competence through pre-IVM with CNP combined with cysteamine may be associated with an increased antioxidant defense. Therefore, such an approach may be a good option for establishing a pre-IVM system.
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Affiliation(s)
- J. Zhenwei
- Correspondence: J. Zhenwei, Department of Animal Genetic Breeding and Reproduction, College of Animal Science and Technology, Inner Mongolia University for the Nationalities, Tongliao, 028043, China. E-mail:
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Smuts MP, de Bruyn S, Thompson PN, Holm DE. Serum albumin concentration of donor cows as an indicator of developmental competence of oocytes. Theriogenology 2018; 125:184-192. [PMID: 30453218 DOI: 10.1016/j.theriogenology.2018.09.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 08/07/2018] [Accepted: 09/04/2018] [Indexed: 11/28/2022]
Abstract
Adequate nutrition is required for maintenance of normal reproduction in cattle. Albumin, the best marker and fundamental part of nutrition, most abundant plasma protein and major component of fetal bovine serum, is the best predictor of malnourishment in South African cattle. The aim of this study was to determine if serum albumin concentrations of donor cows predict the developmental competence of oocytes, and if additional protein supplementation of the in vitro culture media improves embryo outcomes in oocytes from cows with inadequate serum albumin concentrations. Oocytes (n = 1024) were recovered from donors with inadequate (≤35.9 g/L), or adequate serum albumin concentrations (≥36.0 g/L). Four hundred and sixty oocytes originated from cows with inadequate serum albumin and 564 from cows with adequate serum albumin. Oocytes of these cohorts were randomly allocated to a control and supplemented fetal bovine serum in vitro embryo culture protocol. Multiple linear, logistic and Poisson regression analyses were performed to estimate the effects of different covariates on linear, binary and count data respectively. Mixed effects Poisson regression was performed for the number of oocytes that developed into blastocysts by the seventh day of culture. Adequate serum albumin concentration of donor cows independently resulted in 46% increased blastocyst formation in the control protocol (P = 0.02). Although fetal bovine serum supplementation of the culture protocol did not affect blastocyst formation in oocytes originating from cows with inadequate serum albumin, it independently reduced blastocyst formation by 30% in oocytes originating from cows with adequate serum albumin (P = 0.02). Other independent predictors of blastocyst outcome included higher serum urea nitrogen, lower beta (β)-hydroxybutyric acid concentrations and lower fat classification of donor cows. It is concluded that adequate serum albumin of donor cows is a significant predictor of developmental competence of oocytes, and that in vitro supplementation of fetal bovine serum does not improve developmental competence of oocytes and can lead to negative blastocyst outcomes. Further research is required to determine optimal protein supplementation for oocytes originating from inadequately nourished cows.
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Affiliation(s)
- Mario P Smuts
- Department of Production Animal Studies, Faculty of Veterinary Science, University of Pretoria, Private Bag X04, Onderstepoort, 0110, South Africa
| | - Sonya de Bruyn
- Department of Production Animal Studies, Faculty of Veterinary Science, University of Pretoria, Private Bag X04, Onderstepoort, 0110, South Africa
| | - Peter N Thompson
- Department of Production Animal Studies, Faculty of Veterinary Science, University of Pretoria, Private Bag X04, Onderstepoort, 0110, South Africa
| | - Dietmar E Holm
- Department of Production Animal Studies, Faculty of Veterinary Science, University of Pretoria, Private Bag X04, Onderstepoort, 0110, South Africa.
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28
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Da Broi MG, Giorgi VSI, Wang F, Keefe DL, Albertini D, Navarro PA. Influence of follicular fluid and cumulus cells on oocyte quality: clinical implications. J Assist Reprod Genet 2018; 35:735-751. [PMID: 29497954 PMCID: PMC5984887 DOI: 10.1007/s10815-018-1143-3] [Citation(s) in RCA: 139] [Impact Index Per Article: 23.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2017] [Accepted: 02/19/2018] [Indexed: 01/03/2023] Open
Abstract
An equilibrium needs to be established by the cellular and acellular components of the ovarian follicle if developmental competence is to be acquired by the oocyte. Both cumulus cells (CCs) and follicular fluid (FF) are critical determinants for oocyte quality. Understanding how CCs and FF influence oocyte quality in the presence of deleterious systemic or pelvic conditions may impact clinical decisions in the course of managing infertility. Given that the functional integrities of FF and CCs are susceptible to concurrent pathological conditions, it is important to understand how pathophysiological factors influence natural fertility and the outcomes of pregnancy arising from the use of assisted reproduction technologies (ARTs). Accordingly, this review discusses the roles of CCs and FF in ensuring oocyte competence and present new insights on pathological conditions that may interfere with oocyte quality by altering the intrafollicular environment.
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Affiliation(s)
- M. G. Da Broi
- Division of Human Reproduction, Department of Gynecology and Obstetrics, Ribeirão Preto School of Medicine, University of São Paulo, Avenida Bandeirantes, 3900, Ribeirao Preto, SP CEP: 14049-900 Brazil
| | - V. S. I. Giorgi
- Division of Human Reproduction, Department of Gynecology and Obstetrics, Ribeirão Preto School of Medicine, University of São Paulo, Avenida Bandeirantes, 3900, Ribeirao Preto, SP CEP: 14049-900 Brazil
| | - F. Wang
- Department of Obstetrics and Gynecology, Laboratory of Reproductive Medicine, NYU School of Medicine, 180 Varick Street, New York, NY 10014 USA
| | - D. L. Keefe
- Department of Obstetrics and Gynecology, Laboratory of Reproductive Medicine, NYU School of Medicine, 180 Varick Street, New York, NY 10014 USA
- Department of Obstetrics and Gynecology, New York University, Langone Medical Center, New York, NY 10016 USA
| | - D. Albertini
- The Center for Human Reproduction, New York, NY USA
| | - P. A. Navarro
- Division of Human Reproduction, Department of Gynecology and Obstetrics, Ribeirão Preto School of Medicine, University of São Paulo, Avenida Bandeirantes, 3900, Ribeirao Preto, SP CEP: 14049-900 Brazil
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Wiesak T, Wasielak M, Złotkowska A, Milewski R. Effect of vitrification on the zona pellucida hardening and follistatin and cathepsin B genes expression and developmental competence of in vitro matured bovine oocytes. Cryobiology 2017; 76:18-23. [PMID: 28487134 DOI: 10.1016/j.cryobiol.2017.05.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Revised: 05/02/2017] [Accepted: 05/03/2017] [Indexed: 12/15/2022]
Abstract
The purpose of our study was to assess the effect of vitrification with or without the presence of calcium in the vitrification solution on the: 1) diameter of oocytes and thickness of the zona pellucida, 2) zona pellucida hardening, 3) expression of mRNA follistatin (FST) and cathepsin B (CTSB) in oocytes and 4) developmental competence of embryos derived from in vitro matured and vitrified oocytes. The results of our study demonstrate, that vitrification did not alter thickness of the zona pellucida and diameter of the oocytes, however it triggered hardening of the zona pellucida. The presence of calcium in the vitrification solutions intensified hardening of zona in immature and mature oocytes (P < 0.04, P < 0.001, respectively) and provoked increased mRNA FST expression in oocytes matured in vitro compared to immature oocytes (P < 0.01) and those vitrified without calcium (P < 0.004). CTSB mRNA expression was increased in immature oocytes and oocytes vitrified with calcium compare to mature oocytes (P < 0.02). The developmental potential of vitrified oocytes was impaired compared to non-vitrified oocytes, being more evident in oocytes vitrified with calcium. In summary, vitrification did not change the oocyte diameter and thickness of the zona pellucida and expression of FST and CTSB mRNA. It diminished developmental potential of the vitrified oocytes. The presence of calcium in the vitrification solutions increased hardening of zona pellucida as well as affected the level of FST and CTSB mRNA in oocytes and developmental potential of these oocytes.
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Affiliation(s)
- Teresa Wiesak
- Department of Gamete and Embryo Biology, The Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, Olsztyn, Poland.
| | - Marta Wasielak
- Department of Gamete and Embryo Biology, The Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, Olsztyn, Poland; Center of Gynaecology and Endocrinology and Reproductive Medicine - Artemida, Olsztyn, Poland
| | - Aleksandra Złotkowska
- Department of Hormonal Action Mechanisms, The Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, Olsztyn, Poland
| | - Robert Milewski
- Department of Statistics and Medical Informatics, Medical University of Bialystok, Poland
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Aboelenain M, Balboula AZ, Kawahara M, El-Monem Montaser A, Zaabel SM, Kim SW, Nagano M, Takahashi M. Pyridoxine supplementation during oocyte maturation improves the development and quality of bovine preimplantation embryos. Theriogenology 2017; 91:127-133. [PMID: 28215677 DOI: 10.1016/j.theriogenology.2016.12.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Revised: 12/21/2016] [Accepted: 12/21/2016] [Indexed: 01/19/2023]
Abstract
Recently, inhibition of cathepsin B (CTSB) activity during in vitro maturation (IVM) and culture (IVC) improved the developmental competence and quality of bovine oocytes and embryos. E-64 is a widely used inhibitor to inhibit CTSB activity, however, E-64 inhibits not only CTSB activity but also the activities of other proteases including cathepsin L (CTSL), papain, calpain, and trypsin. Pyridoxine, the catalytically active form of vitamin B6, plays a crucial role in several cellular processes and has the ability to inhibit CTSB activity. However, whether pyridoxine has an improving effect during IVM of bovine oocytes is still unknown. In this study, we investigated the effect of pyridoxine supplementation during IVM on the developmental competence of bovine oocytes and the quality of the produced blastocysts. Supplementation of pyridoxine to the maturation medium significantly decreased the activity of CTSB in both bovine cumulus cells and oocytes. Moreover, pyridoxine improved both the blastocyst and hatched blastocyst rates. In addition, the presence of pyridoxine during IVM also significantly improved the quality of the produced embryos by increasing the total cell number as well as decreasing the CTSB mRNA expression and apoptotic rate. These results indicate that pyridoxine is a promising tool to improve the developmental competence of bovine oocytes and subsequent embryo quality.
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Affiliation(s)
- Mansour Aboelenain
- Laboratory of Animal Breeding and Reproduction, Department of Animal Science, Graduate School of Agriculture, Hokkaido University, Hokkaido, 060-8589, Japan; Department of Theriogenology, Faculty of Veterinary Medicine, Mansoura University, Mansoura, 35516, Egypt
| | - Ahmed Zaky Balboula
- Laboratory of Animal Breeding and Reproduction, Department of Animal Science, Graduate School of Agriculture, Hokkaido University, Hokkaido, 060-8589, Japan; Department of Theriogenology, Faculty of Veterinary Medicine, Mansoura University, Mansoura, 35516, Egypt
| | - Manabu Kawahara
- Laboratory of Animal Breeding and Reproduction, Department of Animal Science, Graduate School of Agriculture, Hokkaido University, Hokkaido, 060-8589, Japan
| | - Abd El-Monem Montaser
- Department of Theriogenology, Faculty of Veterinary Medicine, Mansoura University, Mansoura, 35516, Egypt
| | - Samy Moawad Zaabel
- Department of Theriogenology, Faculty of Veterinary Medicine, Mansoura University, Mansoura, 35516, Egypt
| | - Sung-Woo Kim
- National Institute of Animal Science, Animal Genetic Resources Research Center, Namwon, 55717, South Korea
| | - Masashi Nagano
- Laboratory of Theriogenology, Department of Veterinary Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Hokkaido, 060-0818, Japan
| | - Masashi Takahashi
- Laboratory of Animal Breeding and Reproduction, Department of Animal Science, Graduate School of Agriculture, Hokkaido University, Hokkaido, 060-8589, Japan.
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Higaki S, Kishi M, Koyama K, Nagano M, Katagiri S, Takada T, Takahashi Y. Early germinal vesicle breakdown is a predictor of high preimplantation developmental competent oocytes in mice. ZYGOTE 2017; 25:41-8. [PMID: 27873567 DOI: 10.1017/S0967199416000290] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The preselection of highly developmentally competent oocytes for in vitro maturation (IVM) is crucial for improving assisted reproductive technology. Although several intrinsic markers of oocyte quality are known to be closely related to the onset of nuclear maturation (germinal vesicle break down, GVBD), a direct comparison between GVBD timing and oocyte quality has never been reported. In this study, we established a non-invasive oocyte evaluation method based on GVBD timing for preselecting more developmental competent oocytes in mice. Because the O2 concentration during IVM may affect the nuclear kinetics, all experiments were performed under two distinct O2 concentrations: 20% and 5% O2. First, we determined the time course of changes in nuclear maturation and preimplantation developmental competence of in vitro-matured oocytes to estimate GVBD timing in high developmental competent oocytes. Two-thirds of oocytes that underwent GVBD in early IVM seemed to mainly contribute to the blastocyst yield. To confirm this result, we compared the preimplantation developmental competence of the early and late GVBD oocytes. Cleavage and blastocyst formation rates of early GVBD oocytes (80.2% and 52.7% under 20% O2, respectively, and 67.6% and 47.3% under 5% O2, respectively) were almost double those of late GVBD oocytes (44.8% and 26.0% under 20% O2, respectively, and 40.4% and 17.9% under 5% O2, respectively). With no observable alterations by checking the timing of GVBD in preimplantation developmental competence, oocyte evaluation based on GVBD timing can be used as an efficient and non-invasive preselection method for high developmental competent oocytes.
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Abstract
Purine metabolism is known factor for nuclear maturation of oocytes through both follicle cells and oocyte itself. However, it is largely unknown the roles of purine metabolism in the oocyte competence for fertilization and early development. In this study, the effects of adenosine in oocyte competence for development were examined using adenosine and its synthetic inhibitors. Adenosine treatment from GV intact stage for 18 hr (fGV) caused of decrease the fertilization rate but of increase the cleavage rate compared from the other stage treatment groups. Hadacidin did not effect on fertilization rate but increased cleavage rate without stage specificity. Adenosine did not block the effects of hadacidin with the exception of fGV group. By the inhibition of purine synthetic pathways the fertilization rate was decreased in the fGV and fGVB groups but increased in the fMII group. Exogenous adenosine caused of decrease fertilization rate in the fGVB group but increase in the fMII group. Cleavage rate was dramatically increased in the adenosine treatment with synthetic inhibitors. It means that the metabolism of purine has stage specific effects on fertilization and cleavage. Exogenous adenosine had only can improve oocyte developmental competence when it treated at GV intact stage. On the other hand, endogenous synthesis in all maturation stage caused of increase the cleavage rate without effects on fertilization. These data suggest that adenosine at GV stage as a paracrine fashion and inhibitions of endogenous adenosine in all stage improve oocyte developmental competence..
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Affiliation(s)
- Yong-Pil Cheon
- Division of Development and Physiology, Department of Biology, Institute for Basic Sciences, Sungshin Women's University, Seoul 136-742, Republic of Korea
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Bebbere D, Masala L, Albertini DF, Ledda S. The subcortical maternal complex: multiple functions for one biological structure? J Assist Reprod Genet 2016; 33:1431-1438. [PMID: 27525657 DOI: 10.1007/s10815-016-0788-z] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Accepted: 08/02/2016] [Indexed: 02/07/2023] Open
Abstract
The subcortical maternal complex (SCMC) is a multiprotein complex uniquely expressed in mammalian oocytes and early embryos, essential for zygote progression beyond the first embryonic cell divisions. Similiar to other factors encoded by maternal effect genes, the physiological role of SCMC remains unclear, although recent evidence has provided important molecular insights into different possible functions. Its potential involvement in human fertility is attracting increasing attention; however, the complete story is far from being told. The present mini review provides an overview of recent findings related to the SCMC and discusses its potential physiological role/s with the aim of inspiring new directions for future research.
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Affiliation(s)
- D Bebbere
- Department of Veterinary Medicine, University of Sassari, via Vienna 2, 07100, Sassari, Italy.
| | - L Masala
- Department of Veterinary Medicine, University of Sassari, via Vienna 2, 07100, Sassari, Italy
| | - D F Albertini
- The Center for Human Reproduction, New York, NY, USA.,Department of Molecular and Integrative Physiology, University of Kansas Medical Center, Kansas City, KS, USA
| | - S Ledda
- Department of Veterinary Medicine, University of Sassari, via Vienna 2, 07100, Sassari, Italy
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Landry DA, Bellefleur AM, Labrecque R, Grand FX, Vigneault C, Blondin P, Sirard MA. Effect of cow age on the in vitro developmental competence of oocytes obtained after FSH stimulation and coasting treatments. Theriogenology 2016; 86:1240-6. [PMID: 27215669 DOI: 10.1016/j.theriogenology.2016.04.064] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Revised: 04/11/2016] [Accepted: 04/15/2016] [Indexed: 11/20/2022]
Abstract
The use of oocytes obtained from younger donors for IVF followed by embryo transfer represents an opportunity to accelerate genetic gain by reducing generation time. In this study, we investigated the relationship between donor age and the in vitro developmental competence of oocytes obtained from Holstein females (aged 5-18 months) after FSH stimulation and coasting. The follicle size patterns showed a significantly higher total number of small follicles (5-6 mm) from donors aged 5 to 10 months and a higher total number of medium-sized follicles (7-10 mm) in donors aged 6 to 7 months. Our analysis also revealed that the total number of follicles was significantly higher (P < 0.05) in donors aged 5 to 8 months and tended to be higher (P = 0.053) in nine-month-old donors. However, oocytes obtained from donors aged 5 to 10 months yielded fewer embryos reaching the morula and blastocyst stages. In summary, our results demonstrate that a higher number of oocytes can be obtained from younger animals but lower developmental competence negates this gain.
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Abstract
During mammalian embryonic development, the trophectoderm and primitive endoderm give rise to extraembryonic tissues, while the epiblast differentiates into all somatic lineages and the germline. Remarkably, only a few classes of signaling pathways induce the differentiation of these progenitor cells into diverse lineages. Accordingly, the functional outcome of a particular signal depends on the developmental competence of the target cells. Thus, developmental competence can be defined as the ability of a cell to integrate intrinsic and extrinsic cues to execute a specific developmental program toward a specific cell fate. Downstream of signaling, there is the combinatorial activity of transcription factors and their cofactors, which is modulated by the chromatin state of the target cells. Here, we discuss the concept of developmental competence, and the factors that regulate this state with reference to the specification of mammalian primordial germ cells.
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Affiliation(s)
- Ufuk Günesdogan
- Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Cambridge, United Kingdom; Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, United Kingdom.
| | - M Azim Surani
- Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Cambridge, United Kingdom; Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, United Kingdom.
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Nemcova L, Jansova D, Vodickova-Kepkova K, Vodicka P, Jeseta M, Machatkova M, Kanka J. Detection of genes associated with developmental competence of bovine oocytes. Anim Reprod Sci 2016; 166:58-71. [PMID: 26811294 DOI: 10.1016/j.anireprosci.2016.01.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Revised: 12/10/2015] [Accepted: 01/04/2016] [Indexed: 01/22/2023]
Abstract
The developmental competence of oocytes is acquired progressively during folliculogenesis and is linked to follicular size. It has been documented that oocytes originating from larger follicles exhibit a greater ability to develop to the blastocyst stage. The differences in cytoplasmic factors such as mRNA transcripts could explain the differences in oocyte developmental potential. We used bovine oligonucleotide microarrays to characterize differences between the gene expression profiles of germinal vesicle stage (GV) oocytes with greater developmental competence from medium follicles (MF) and those with less developmental competence from small follicles (SF). After normalizing the microarray data, our analysis found differences in the level of 60 transcripts (≥1.4 fold), corresponding to 49 upregulated and 11 downregulated transcripts in MF oocytes compared to SF oocytes. The gene expression data were classified according to gene ontology, the majority of the genes were associated with the regulation of transcription, translation, the cell cycle, and mitochondrial activity. A subset of 16 selected genes was validated for GV oocytes by quantitative real-time RT-PCR; significant differences (P˂0.01) were found in the level of TAF1A, MTRF1L, ATP5C1, UBL5 and MAP3K13 between the MF and SF oocytes. After maturation the transcript level remained stable for ATP5F1, BRD7, and UBL5 in both oocyte categories. The transcript level of another 13 genes substantially dropped in the MF and/or SF oocytes. It can be concluded that the developmental competence of bovine oocytes and embryos may be a quantitative trait dependent on small changes in the transcription profiles of many genes.
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Affiliation(s)
- Lucie Nemcova
- Laboratory of Developmental Biology, Institute of Animal Physiology and Genetics, Academy of Sciences of the Czech Republic, Libechov, Czech Republic.
| | - Denisa Jansova
- Laboratory of Developmental Biology, Institute of Animal Physiology and Genetics, Academy of Sciences of the Czech Republic, Libechov, Czech Republic
| | - Katerina Vodickova-Kepkova
- Laboratory of Developmental Biology, Institute of Animal Physiology and Genetics, Academy of Sciences of the Czech Republic, Libechov, Czech Republic
| | - Petr Vodicka
- Laboratory of Developmental Biology, Institute of Animal Physiology and Genetics, Academy of Sciences of the Czech Republic, Libechov, Czech Republic; Department of Neurology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, USA
| | - Michal Jeseta
- Department of Genetics and Reproduction, Veterinary Research Institute, Brno, Czech Republic
| | - Marie Machatkova
- Department of Genetics and Reproduction, Veterinary Research Institute, Brno, Czech Republic
| | - Jiri Kanka
- Laboratory of Developmental Biology, Institute of Animal Physiology and Genetics, Academy of Sciences of the Czech Republic, Libechov, Czech Republic
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Pan Y, Cui Y, He H, Baloch AR, Fan J, Xu G, He J, Yang K, Li G, Yu S. Developmental competence of mature yak vitrified-warmed oocytes is enhanced by IGF-I via modulation of CIRP during in vitro maturation. Cryobiology 2015; 71:493-8. [PMID: 26519204 DOI: 10.1016/j.cryobiol.2015.10.150] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2015] [Revised: 10/24/2015] [Accepted: 10/26/2015] [Indexed: 12/24/2022]
Abstract
The objective of this study was to investigate whether developmental competence of mature vitrified-warmed yak (Bos grunniens) oocytes can be enhanced by supplemented insulin-like growth factor I (IGF-1) during in vitro maturation (IVM), and its relationship with the expression of cold-inducible RNA-binding protein (CIRP). In experiment 1, immature yak oocytes were divided into four groups, and IVM supplemented with 0, 50, 100 and 200 ng/mL IGF-1 was evaluated; the mRNA and protein expression levels of CIRP in mature oocytes in the four groups were evaluated using quantitative real-time PCR and western blotting analyses. In experiment 2, the mature yak oocytes in the four groups were cryopreserved using the Cryotop (CT) method, followed by chemical activation and in vitro culture for two days and eight days to determine cleavage, blastocyst rates, and total cell number in the blastocysts. Mature yak oocytes without vitrification served as a control group. The outcomes were as following: (1) the expression of CIRP in the matured oocytes was up-regulated in the IGF-1 groups and was highest expression was observed in the 100 ng/mL IGF-1 treatment group. (2) In the vitrified-warmed groups, the rates of cleavage and blastocyst were also highest in the 100 ng/mL IGF-1 treatment group (81.04 ± 1.06%% and 32.16 ± 1.01%), which were close to the rates observed in groups without vitrification (83.25 ± 0.85% and 32.54 ± 0.34%). The rates of cleavage and blastocyst in the other vitrified-warmed groups were 70.92 ± 1.32% and 27.33 ± 1.31% (0 ng/mL); 72.73 ± 0.74% and 29.41 ± 0.84% (50 ng/mL); 72.43 ± 0.61% and 27.61 ± 0.59% (200 ng/mL), respectively. There was no significant difference in the total cell number per blastocysts between the vitrified-warmed groups and group without vitrification. Thus, we conclude that the enhancement in developmental competence of mature yak vitrified-warmed oocytes after the addition of IGF-1 during IVM might result from the regulation of CIRP expression in mature yak oocytes prior to vitrification.
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Affiliation(s)
- Yangyang Pan
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Yan Cui
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Honghong He
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Abdul Rasheed Baloch
- University of South Bohemia in České Budějovice, Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, Research Institute of Fish Culture and Hydrobiology, Zátiší 728/II, 389 25 Vodňany, Czech Republic
| | - Jiangfeng Fan
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Gengquan Xu
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Junfeng He
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Kun Yang
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Guyue Li
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Sijiu Yu
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China.
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Pan Y, Cui Y, Baloch AR, Fan J, He J, Zhang Y, Zheng H, Li G, Yu S. Association of heat shock protein 90 with the developmental competence of immature oocytes following Cryotop and solid surface vitrification in yaks (Bos grunniens). Cryobiology 2015; 71:33-9. [PMID: 26049112 DOI: 10.1016/j.cryobiol.2015.06.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2015] [Revised: 05/27/2015] [Accepted: 06/02/2015] [Indexed: 11/29/2022]
Abstract
The correlation between the 90 kDa heat-shock protein (HSP90) and the developmental competence of yak (Bos grunniens) oocytes following the process of vitrification has not been studied clearly. In the present study, we compare the efficacies of Cryotop (CT) and solid surface vitrification (SSV) methods for the cryopreservation of immature yak oocytes. Yak cumulus oocyte complexes were randomly allocated into three groups: (1) controls, (2) CT vitrification, and (3) SSV vitrification. Oocytes were vitrified and in vitro maturated and fertilized. The percentages of nuclear maturation and in vitro development were evaluated. The vitrified-warmed oocytes were evaluated for mRNA and protein expression levels of HSP90 using quantitative real-time PCR and western blotting at various stages: matured oocytes, 2-8 cells embryos and blastocysts. No difference was found in the percentages of nuclear maturation, cleavage or blastocyst in the two vitrified groups; however, the rates of maturation were significantly lower than those in the control group. Among the three groups, the maturation rates in CT: 51.14±0.86% and SSV: 50.82±1.34% were less than those of the controls: 69.65±1.13%; the cleavage rates in CT: 39.16±1.01% and SSV: 39.08±0.92%, were less than those of the controls: 58.14±0.76%; but the blastocysts rates and total cell number in the blastocysts were similar: CT: 32.20±0.73% and 104.6±3.72; SSV: 32.35±0.81% and 102.4±1.34; and controls: 34.38±1.32% and 103.8±4.13, respectively. The HSP90 expression level in the matured oocytes and 2-8 cell embryos of the control group was significantly higher than that in the two vitrified groups; there was not significant difference in the blastocysts in the three groups. We thus conclude that CT and SSV perform equally in the vitrification of immature yak oocytes during the process of cryopreservation, and their influence on oocytes mainly occured from the maturation to cleavage stages. The HSP90 levels in the blastocysts of the vitrified groups increased is associated with the developmental competence of the embryo.
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Affiliation(s)
- Yangyang Pan
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Yan Cui
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | | | - Jiangfeng Fan
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Junfeng He
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Yifu Zhang
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Hongfei Zheng
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Guyue Li
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Sijiu Yu
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China.
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Niu Y, Wang C, Xiong Q, Yang X, Chi D, Li P, Liu H, Li J, Huang R. Distribution and content of lipid droplets and mitochondria in pig parthenogenetically activated embryos after delipation. Theriogenology 2014; 83:131-8. [PMID: 25280581 DOI: 10.1016/j.theriogenology.2014.09.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Revised: 08/29/2014] [Accepted: 09/01/2014] [Indexed: 11/26/2022]
Abstract
The present study examines the effect of delipation on developmental competence and the distribution pattern of lipid droplets (LDs) and mitochondria in parthenogenetically activated (PA) pig embryos. Mature oocytes were delipated by centrifugation after partial digestion of the zonae pellucidae, subjected to parthenogenetic activation after total removal of zonae pellucidae by pronase, and then cultured in vitro up to the blastocyst stage. The contents and distributions of LDs and mitochondria in the oocytes and/or embryos were observed by staining with Oil Red O and MitoTracker Red CMXRos, respectively. The LD and mitochondrial contents were significantly reduced by the delipation process, and only smaller LDs remained in the delipated oocytes and/or embryos. Their content remained constant from the metaphase II oocyte to the blastocyst stage, but they became gradually smaller as the oocytes and/or embryos developed. The distribution pattern of the LDs in the delipated embryos changed over time and in a manner different to that seen in the controls. In the early developmental stages (1- to 4-cell stages), they were distributed peripherally and formed a ring around the nucleus. However, by the blastocyst stage, a homogeneous distribution of LDs was observed in both the inner cell mass and trophectoderm. The distribution pattern of mitochondria also changed with the development of the delipated PA embryos and again, in ways different to those seen in the controls. In the early 1- to 4-cell stages, a peripheral distribution of mitochondrial foci was observed in each blastomere. However, in blastocysts, the mitochondria were homogeneously distributed throughout the inner cell mass and trophectoderm. Although the cleavage rate at the 2- and 4-cell stages of the PA embryos was not affected by delipation (95.83 ± 2.25% vs. 97.44 ± 0.67%; 79.17 ± 4.47% vs. 84.62 ± 1.19%), it was reduced significantly in the blastocyst compared with the controls (21.67 ± 3.78% vs. 49.36 ± 1.77%). The distribution pattern of the LDs in oocytes and/or embryos at different developmental stages, and that of the mitochondria in metaphase II oocytes, was affected by delipation. The developmental competence of porcine PA embryos would appear to be affected by delipation.
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Affiliation(s)
- Yingjie Niu
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu Province, P.R. China
| | - Chengfei Wang
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu Province, P.R. China
| | - Qiang Xiong
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu Province, P.R. China
| | - Xixiang Yang
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu Province, P.R. China
| | - Daming Chi
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu Province, P.R. China
| | - Pinghua Li
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu Province, P.R. China
| | - Honglin Liu
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu Province, P.R. China
| | - Juan Li
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu Province, P.R. China.
| | - Ruihua Huang
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu Province, P.R. China
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Abdoon AS, Gabler C, Holder C, Kandil OM, Einspanier R. Seasonal variations in developmental competence and relative abundance of gene transcripts in buffalo (Bubalus bubalis) oocytes. Theriogenology 2014; 82:1055-67. [PMID: 25156970 DOI: 10.1016/j.theriogenology.2014.07.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2013] [Revised: 06/29/2014] [Accepted: 07/03/2014] [Indexed: 11/20/2022]
Abstract
Hot season is a major constraint to production and reproduction in buffaloes. The present work aimed to investigate the effect of season on ovarian function, developmental competence, and the relative abundance of gene expression in buffalo oocytes. Three experiments were conducted. In experiment 1, pairs of buffalo ovaries were collected during cold season (CS, autumn and winter) and hot season (HS, spring and summer), and the number of antral follicles was recorded. Cumulus oocyte complexes (COCs) were aspirated and evaluated according to their morphology into four Grades. In experiment 2, Grade A and B COCs collected during CS and HS were in vitro matured (IVM) for 24 hours under standard conditions at 38.5 °C in a humidified air of 5% CO2. After IVM, cumulus cells were removed and oocytes were fixed, stained with 1% aceto-orcein, and evaluated for nuclear configuration. In vitro matured buffalo oocytes harvested during CS or HS were in vitro fertilized (IVF) using frozen-thawed buffalo semen and cultured in vitro to the blastocyst stage. In experiment 3, buffalo COCs and in vitro matured oocytes were collected during CS and HS, and then snap frozen in liquid nitrogen for gene expression analysis. Total RNA was extracted from COCs and in vitro matured oocytes, and complementary DNA was synthesized; quantitative Reverse Transcription-Polymerase Chain Reaction was performed for eight candidate genes including GAPDH, ACTB, B2M, GDF9, BMP15, HSP70, and SOD2. The results indicated that HS significantly (P < 0.01) decreased the number of antral follicles and the number of COCs recovered per ovary. The number of Grade A, B, and C COCs was lower (P < 0.05) during HS than CS. In vitro maturation of buffalo oocytes during HS significantly (P < 0.01) reduced the number of oocytes reaching the metaphase II stage and increased the percentage of degenerated oocytes compared with CS. Oocytes collected during HS also showed signs of cytoplasmic degeneration. After IVF, cleavage rate was lower (P < 0.01) for oocytes collected during HS, and the percentage of oocytes arrested at the two-cell stage was higher (P < 0.01) than oocytes IVF during CS. Oocytes matured during CS showed a higher (P < 0.01) blastocyst rate than those matured during HS. Also, COCs recovered in HS showed significant (P < 0.05) upregulation of HSP70 mRNA expression compared with those recovered in CS. For in vitro matured oocytes, CS down regulated the transcript abundance of ACTB and upregulated GAPDH and HSP70 mRNA levels compared with HS condition. In conclusion, HS could impair buffalo fertility by reducing the number of antral follicles and oocyte quality. In vitro maturation of buffalo oocytes during HS impairs their nuclear and cytoplasmic maturation, fertilization, and subsequent embryo development to the morula and blastocyst stages. This could be in part because of the altered gene expression found in COCs and in vitro matured oocytes.
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Cortell C, Salvetti P, Joly T, Viudes-de-Castro MP. Effect of different superovulation stimulation protocols on adenosine triphosphate concentration in rabbit oocytes. ZYGOTE 2015; 23:507-13. [PMID: 24735658 DOI: 10.1017/S0967199414000112] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Ovarian stimulation protocols are used usually to increase the number of oocytes collected. The determination of how oocyte quality may be affected by these superovulation procedures, therefore, would be very useful. There is a high correlation between oocyte ATP concentration and developmental competence of the resulting embryo. The aim of this study was to evaluate the effect of follicle stimulating hormone (FSH) origin and administration protocols on oocyte ATP content. Rabbit does were distributed randomly into four groups: (i) a control group; (ii) the rhFSH3 group: females were injected, every 24 h over 3 days, with 0.6 μl of rhFSH diluted in polyvinylpyrrolidone (PVP); (iii) the pFSH3 group: females were injected every 24 h over 3 days with 11.4 μg of pFSH diluted in PVP; and (iv) the pFSH5 group: females were injected twice a day for 5 days with 11.4 μg of pFSH diluted in saline serum. Secondly, the effect of pFSH5 protocol on developmental potential was evaluated. Developmental competence of oocytes from the control and pFSH5 groups was examined. Differences in superovulation treatments were found for ATP levels. In the pFSH5 group, the ATP level was significantly lower than that of the other groups (5.63 ± 0.14 for pFSH group versus 6.42 ± 0.13 and 6.19 ± 0.15 for rhFSH3 and pFSH3, respectively; P < 0.05). In a second phase, only 24.28% of pFSH5 ova developed into hatched blastocysts compared with 80.39% for the control group. A negative effect on oocyte quality was observed in the pFSH5 group in ATP production, it is possible that, after this superovulation treatment, oocyte metabolism would be affected.
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Abstract
Application of in vitro maturation (IVM) is recently increasing for human infertility, especially to rescue patients of polycystic ovarian syndrome and ovarian hyperstimulation syndrome. To increase the application of IVM oocytes for embryo production and the efficiency of successful production of babies using IVM oocytes, quality control of oocytes and achievement of fertilization in the most suitable condition may be very important. In this paper, suitable conditions for fertilization of IVM oocytes will be discussed with recent knowledge about IVM and in vitro fertilization of oocytes in domestic animals. Currently, human oocytes are collected mainly from patients' ovaries 36 h following mild gonadotropin stimulation and used for IVM for 24-26 h. However, asynchronous progression of those oocytes to reach the metaphase-II stage may have occurred during the IVM culture. In the oocytes that have already progressed to the metaphase-II stage, sudden aging such as reduction in maturation promoting factor and MAP kinases will start to occur. Application of specific inhibitors of phosphodiesterase to control intracellular cAMP (cyclic adenosine monophosphate) level may be effective to synchronize timings of the germinal vesicle breakdown and consequently the meiotic progression of oocytes, and to improve the developmental competence. Furthermore, treatment of aging oocytes with caffeine appears to rescue them from reductions in maturation promoting factor and MAP kinases and to improve the developmental competence. Assessment methods to select oocytes with good quality may also be important to improve the successful rates.
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Affiliation(s)
- Hiroaki Funahashi
- Department of Animal Science Okayama University Tsushima-Naka, Kita-Ku 700-8530 Okayama Japan
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