1
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Guo Y, Yang J, Gao H, Tian X, Zhang X, Kan Q. Development and Verification of a Combined Immune- and Metabolism-Related Prognostic Signature for Hepatocellular Carcinoma. Front Immunol 2022; 13:927635. [PMID: 35874741 PMCID: PMC9304746 DOI: 10.3389/fimmu.2022.927635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Accepted: 06/10/2022] [Indexed: 12/09/2022] Open
Abstract
Immune escape and metabolic reprogramming are becoming important characteristics of tumor biology, which play critical roles in tumor initiation and progression. However, the integrative analysis of immune and metabolic characteristics for the tumor microenvironment in hepatocellular carcinoma (HCC) remains unclear. Herein, by univariate and least absolute shrinkage and selection operator (LASSO) Cox regression analyses, a prognostic signature associated with tumor microenvironment was established based on five immune- and metabolism-related genes (IMRGs), which was fully verified and evaluated in both internal and external cohorts. The C-index was superior to previously published HCC signatures, indicating the robustness and reliability of IMRGs prognostic signature. A nomogram was built based on IMRGs prognostic signature and various clinical parameters, such as age and T stage. The AUCs of nomogram at 1-, 3-, and 5-year (AUC = 0.829, 0.749, 0.749) were slightly better than that of IMRGs signature (AUC = 0.809, 0.734, 0.711). The relationship of risk score (RS) with immune checkpoint expressions, immunophenoscore (IPS), as well as microsatellite instability (MSI) together accurately predicted the treatment efficacy. Collectively, the IMRGs signature might have the potential to better predict prognostic risk, evaluate immunotherapy efficacy, and help personalize immunotherapy for HCC patients.
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Affiliation(s)
- Yuanyuan Guo
- Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou, China
| | - Jing Yang
- Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou, China
| | - Hua Gao
- Department of Radiotherapy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Xin Tian
- Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou, China
- *Correspondence: Xin Tian, ; Xiaojian Zhang, ; Quancheng Kan,
| | - Xiaojian Zhang
- Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou, China
- *Correspondence: Xin Tian, ; Xiaojian Zhang, ; Quancheng Kan,
| | - Quancheng Kan
- Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- Henan Key Laboratory of Precision Clinical Pharmacy, Zhengzhou University, Zhengzhou, China
- *Correspondence: Xin Tian, ; Xiaojian Zhang, ; Quancheng Kan,
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2
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Pyeon DB, Lee SE, Yoon JW, Park HJ, Oh SH, Lee DG, Kim EY, Park SP. Comparison of the improving embryo development effects of Sasa quelpaertensis Nakai extract, p-coumaric acid, and myricetin on porcine oocytes according to their antioxidant capacities. Theriogenology 2022; 185:97-108. [DOI: 10.1016/j.theriogenology.2022.03.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Revised: 03/10/2022] [Accepted: 03/11/2022] [Indexed: 10/18/2022]
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3
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Maeng G, Gong W, Das S, Yannopoulos D, Garry DJ, Garry MG. ETV2-null porcine embryos survive to post-implantation following incomplete enucleation. Reproduction 2021; 159:539-547. [PMID: 31990674 DOI: 10.1530/rep-19-0382] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Accepted: 01/28/2020] [Indexed: 11/08/2022]
Abstract
Blind enucleation is used in porcine somatic cell nuclear transfer (SCNT) to remove the metaphase II (MII) spindle from the oocyte. Deviation of the MII spindle location, however, leads to incomplete enucleation (IE). Here, we report that the rate of complete enucleation (CE) using the blind method was 80.2 ± 1.7%, although this significantly increased when the polar body-MII deviation was minimized (≦45°). While it is established that IE embryos will not survive to full term, the effect of IE on early stage development is unknown. We have previously demonstrated in mice and pigs that ETV2 deletion results in embryonic lethality due to the lack of hematoendothelial lineages. We observed that ETV2-null cloned embryos derived from blindly and incompletely enucleated oocytes had both WT and mutant sequences at E18 and, using FISH analysis, we observed triploidy. We also compared SCNT embryos generated from either CE or intentionally IE oocytes using the spindle viewer system. We observed a higher in vitro blastocyst rate in the IE versus the CE-SCNT embryos (31.9 ± 3.2% vs 21.0 ± 2.1%). Based on known processes in normal fertilization, we infer that the IE-SCNT embryos extruded the haploid second PB after fusion with donor fibroblasts and formed a near-triploid aneuploid nucleus in each blastomere. These studies demonstrate the peri-implantation survival of residual haploid nuclei following IE and emphasize the need for complete enucleation especially for the analysis of SCNT embryos in the peri-implantation stage and will, further, impact the field of reverse xenotransplantation.
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Affiliation(s)
- Geunho Maeng
- Department of Medicine, University of Minnesota, Minneapolis, Minnesota, USA
| | - Wuming Gong
- Department of Medicine, University of Minnesota, Minneapolis, Minnesota, USA
| | - Satyabrata Das
- Department of Medicine, University of Minnesota, Minneapolis, Minnesota, USA
| | | | - Daniel J Garry
- Department of Medicine, University of Minnesota, Minneapolis, Minnesota, USA.,Stem Cell Institute, University of Minnesota, Minneapolis, Minnesota, USA.,Paul and Sheila Wellstone Muscular Dystrophy Center, University of Minnesota, Minneapolis, Minnesota, USA.,NorthStar Genomics, Eagan, Minnesota, USA
| | - Mary G Garry
- Department of Medicine, University of Minnesota, Minneapolis, Minnesota, USA.,Stem Cell Institute, University of Minnesota, Minneapolis, Minnesota, USA.,Paul and Sheila Wellstone Muscular Dystrophy Center, University of Minnesota, Minneapolis, Minnesota, USA.,NorthStar Genomics, Eagan, Minnesota, USA
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4
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Lee JH, Yoo M, Lee SM, Park SJ, Kil TY, Kim MK. Toxicity of the recombinant human hyaluronidase ALT-BC4 on embryonic development. JOURNAL OF ANIMAL SCIENCE AND TECHNOLOGY 2021; 63:272-280. [PMID: 33987603 PMCID: PMC8071738 DOI: 10.5187/jast.2021.e34] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 12/29/2020] [Accepted: 12/29/2020] [Indexed: 11/20/2022]
Abstract
Cumulus-oocyte complexes (COCs), which contain immature oocytes, are matured
in vitro for in vitro embryo production. Oocyte and cumulus
cells are then separated using hyaluronidase. To date, there have only been a
few reported cases of the toxic effects of hyaluronidase on porcine oocytes. The
aim of this study was to compare the effects of bovine testis-derived
hyaluronidase and recombinant human hyaluronidase on oocyte denudation and
quality. Porcine COCs were matured for 44 h and denuded using different
hyaluronidase concentrations and exposure times. Then, oocytes were activated by
electrical parthenogenesis. In experiment 1, COCs were denuded using
bovine-derived, ovine-derived (Hirax), and human recombinant (ALT-BC4)
hyaluronidases for 10 and 20 min. In experiment 2, bovine-derived and human
recombinant (ALT-BC4 and ICSI Cumulase®) hyaluronidases were
used to denude the COCs for 2 and 20 min. In both experiments the oocytes were
all completely denuded, and there was no degeneration. Rate of embryo
development was significantly increased in group treated ALT-BC4 for 2 min and
not significantly different in other treatment groups. In general it slightly
decreased with longer exposure times. These results have confirmed that
different sources of hyaluronidase do not have detrimental effects on the
quality of porcine oocytes and suggest that the human recombinant hyaluronidase
ALT-BC4 is suitable for oocyte denudation with an increased blastocyst rate.
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Affiliation(s)
- Ji Hye Lee
- Division of Animal and Dairy Science, College of Agriculture and Life Science, Chungnam National University, Daejeon 34134, Korea
| | | | | | | | - Tae Young Kil
- Department of Social Welfare, Joongbu University, Geumsan 32713, Korea
| | - Min Kyu Kim
- Division of Animal and Dairy Science, College of Agriculture and Life Science, Chungnam National University, Daejeon 34134, Korea.,MK Biotech, Daejeon 34134, Korea
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5
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Lin T, Lee JE, Shin HY, Lee JB, Kim SY, Jin DI. Production and development of porcine tetraploid parthenogenetic embryos. JOURNAL OF ANIMAL SCIENCE AND TECHNOLOGY 2019; 61:225-233. [PMID: 31452909 PMCID: PMC6686146 DOI: 10.5187/jast.2019.61.4.225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Accepted: 07/02/2019] [Indexed: 11/22/2022]
Abstract
The aim of this study was to produce porcine tetraploid (4N) parthenogenetic
embryos using various methods and evaluate their developmental potential. In
method 1 (M1), porcine 4N parthenogenetic embryos were obtained by inhibiting
extrusion of both first (PB1) and second (PB2) polar bodies; in methods 2 (M2)
and 3 (M3), 4N parthenogenetic embryos were obtained by electrofusion of 2-cell
stage diploid parthenogenetic embryos derived from inhibition of PB2 or PB1
extrusion, respectively. We found no differences in the rates of cleavage or
blastocyst formation or the proportion of 4N embryos among M1, M2, and M3
groups. The different methods also did not influence apoptosis rates (number of
TUNEL-positive cells/number of total cells) or expression levels of
apoptosis-related BAX and BCL2L1 genes.
However, total cell and EdU (5-ethynyl-2’-deoxyuridine)-positive cell
numbers in 4N parthenogenetic blastocysts derived from M1 were higher
(p < 0.05) than those for M2 and M3 groups. Our
results suggest that, although porcine 4N parthenogenetic embryos could be
produced by a variety of methods, inhibition of PB1 and PB2 extrusion (M1) is
superior to electrofusion of 2-cell stage diploid parthenogenetic embryos
derived from inhibition of PB2 (M2) or PB1 (M3) extrusion.
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Affiliation(s)
- Tao Lin
- Division of Animal & Dairy Science, Chungnam National University, Daejeon 34143, Korea
| | - Jae Eun Lee
- Division of Animal & Dairy Science, Chungnam National University, Daejeon 34143, Korea
| | - Hyeon Yeong Shin
- Division of Animal & Dairy Science, Chungnam National University, Daejeon 34143, Korea
| | - Joo Bin Lee
- Division of Animal & Dairy Science, Chungnam National University, Daejeon 34143, Korea
| | - So Yeon Kim
- Division of Animal & Dairy Science, Chungnam National University, Daejeon 34143, Korea
| | - Dong Il Jin
- Division of Animal & Dairy Science, Chungnam National University, Daejeon 34143, Korea
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6
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Wang X, Zhu X, Liang X, Xu H, Liao Y, Lu K, Lu S. Effects of resveratrol on in vitro maturation of porcine oocytes and subsequent early embryonic development following somatic cell nuclear transfer. Reprod Domest Anim 2019; 54:1195-1205. [PMID: 31228864 DOI: 10.1111/rda.13493] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Accepted: 06/17/2019] [Indexed: 12/20/2022]
Abstract
As a natural plant-derived antitoxin, resveratrol possesses several pharmacological activities. This study aimed to evaluate the effects of resveratrol addition on nuclear maturation, oocyte quality during in vitro maturation (IVM) of porcine oocytes and subsequent early embryonic development following somatic cell nuclear transfer (SCNT). Our experiments showed that the treatment of porcine oocytes with 5 µM resveratrol during IVM resulted in the highest rate of the first polar body extrusion. Treatment of oocytes with resveratrol had no influence on cytoskeletal dynamics, whereas it significantly increased glucose uptake ability compared to the control oocytes. Oocytes matured with 5 μM resveratrol displayed significantly lower intracellular reactive oxygen species (ROS) levels and higher relative mRNA expression levels of the genes encoding such antioxidant enzymes as catalase (CAT) and superoxide dismutase 1 (SOD1). In addition, resveratrol also prevented onset and progression of programmed cell death in porcine oocytes, which was confirmed by significant upregulation of the anti-apoptotic B-cell lymphoma 2 (BCL-2) gene and significant downregulation of the pro-apoptotic BCL2-associated X (BAX) gene. Furthermore, the blastocyst rates and the blastocyst cell numbers in cloned embryos derived from the oocytes that had matured in the presence of 5 μM resveratrol were significantly increased. In conclusion, supplementation of IVM medium with 5 μM resveratrol improves the quality of porcine oocytes by protecting them from oxidative damage and apoptosis, which leads to the production of meiotically matured oocytes exhibiting enhanced developmental potential following SCNT.
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Affiliation(s)
- Xuefang Wang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi High Education Key Laboratory for Animal Reproduction and Biotechnology, Faculty of Animal Science & Technology, Guangxi University, Nanning, China
| | - Xiangxing Zhu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi High Education Key Laboratory for Animal Reproduction and Biotechnology, Faculty of Animal Science & Technology, Guangxi University, Nanning, China.,School of Medical Engineering, Foshan University, Foshan, China
| | - Xingwei Liang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi High Education Key Laboratory for Animal Reproduction and Biotechnology, Faculty of Animal Science & Technology, Guangxi University, Nanning, China
| | - Huiyan Xu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi High Education Key Laboratory for Animal Reproduction and Biotechnology, Faculty of Animal Science & Technology, Guangxi University, Nanning, China
| | - Yuying Liao
- Guangxi Key Laboratory of Livestock Genetic Improvement, Guangxi Institute of Animal Sciences, Nanning, China
| | - Kehuan Lu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi High Education Key Laboratory for Animal Reproduction and Biotechnology, Faculty of Animal Science & Technology, Guangxi University, Nanning, China
| | - Shengsheng Lu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi High Education Key Laboratory for Animal Reproduction and Biotechnology, Faculty of Animal Science & Technology, Guangxi University, Nanning, China
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7
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Endoplasmic Reticulum (ER) Stress and Unfolded Protein Response (UPR) in Mammalian Oocyte Maturation and Preimplantation Embryo Development. Int J Mol Sci 2019; 20:ijms20020409. [PMID: 30669355 PMCID: PMC6359168 DOI: 10.3390/ijms20020409] [Citation(s) in RCA: 79] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 01/03/2019] [Accepted: 01/09/2019] [Indexed: 12/11/2022] Open
Abstract
Mammalian oocytes and early embryos derived from in vitro production are highly susceptible to a variety of cellular stresses. During oocyte maturation and preimplantation embryo development, functional proteins must be folded properly in the endoplasmic reticulum (ER) to maintain oocyte and embryo development. However, some adverse factors negatively impact ER functions and protein synthesis, resulting in the activation of ER stress and unfolded protein response (UPR) signaling pathways. ER stress and UPR signaling have been identified in mammalian oocytes and embryos produced in vitro, suggesting that modulation of ER stress and UPR signaling play very important roles in oocyte maturation and the development of preimplantation embryos. In this review, we briefly describe the current state of knowledge regarding ER stress, UPR signaling pathways, and their roles and mechanisms in mammalian (excluding human) oocyte maturation and preimplantation embryo development.
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8
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Diao YF, Lin T, Li X, Oqani RK, Lee JE, Kim SY, Jin DI. Dynamic changes of SETD2, a histone H3K36 methyltransferase, in porcine oocytes, IVF and SCNT embryos. PLoS One 2018; 13:e0191816. [PMID: 29447173 PMCID: PMC5813925 DOI: 10.1371/journal.pone.0191816] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Accepted: 01/11/2018] [Indexed: 01/12/2023] Open
Abstract
SETD2 (SET domain containing protein 2) acts as a histone H3 lysine 36 (H3K36)-specific methyltransferase and may play important roles in active gene transcription in human cells. However, its expression and role in porcine oocytes and preimplantation embryos are not well understood. Here, we used immunofluorescence and laser scanning confocal microscopy to examine SETD2 expression in porcine fetal fibroblasts, oocytes, and preimplantation embryos derived from in vitro fertilization (IVF), parthenogenetic activation (PA), and somatic cell nuclear transfer (SCNT). In porcine fetal fibroblasts, SETD2 expression was detected in interphase cells, but not in M (mitotic)-phase cells. The SETD2 signal was observed in non-surrounded nucleolus (NSN)-stage oocytes, but not in surrounded nucleolus (SN)-, metaphase I (MI)-, or metaphase II (MII)-stage oocytes. The SETD2 signal was detectable in sperm, and undetectable immediately after fertilization, detectable at the 2-cell stage, and peaked at the 4-cell stage of IVF embryos in which porcine embryonic genome is activated. Similar to the pattern found in IVF embryos, the SETD2 signal was absent from PA embryos at the 1-cell stage, but it was detected at the 2-cell stage and thereafter maintained to the blastocyst stage. Interestingly, unlike the IVF and PA embryos, the SETD2 signal was detected throughout the development of SCNT embryos, including at the 1-cell stage. These data suggest that SETD2 may be functional for embryonic gene transcription in porcine preimplantation embryos. It is further speculated that the aberrant expression of SETD2 at the 1-cell stage of porcine SCNT embryos may be a factor in the low efficiency of cloning in pig.
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Affiliation(s)
- Yun Fei Diao
- Institute of Special Animal & Plant Sciences, Chinese Academy of Agricultural Sciences, Changchun, China
| | - Tao Lin
- Department of Animal Science & Biotechnology, Research Center for Transgenic Cloned Pigs, Chungnam National University, Daejeon, Republic of Korea
| | - Xiaoxia Li
- Institute of Special Animal & Plant Sciences, Chinese Academy of Agricultural Sciences, Changchun, China
| | - Reza K. Oqani
- Department of Animal Science & Biotechnology, Research Center for Transgenic Cloned Pigs, Chungnam National University, Daejeon, Republic of Korea
| | - Jae Eun Lee
- Department of Animal Science & Biotechnology, Research Center for Transgenic Cloned Pigs, Chungnam National University, Daejeon, Republic of Korea
| | - So Yeon Kim
- Department of Animal Science & Biotechnology, Research Center for Transgenic Cloned Pigs, Chungnam National University, Daejeon, Republic of Korea
| | - Dong Il Jin
- Department of Animal Science & Biotechnology, Research Center for Transgenic Cloned Pigs, Chungnam National University, Daejeon, Republic of Korea
- * E-mail:
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9
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α-Solanine impairs oocyte maturation and quality by inducing autophagy and apoptosis and changing histone modifications in a pig model. Reprod Toxicol 2017; 75:96-109. [PMID: 29247839 DOI: 10.1016/j.reprotox.2017.12.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Revised: 08/17/2017] [Accepted: 12/12/2017] [Indexed: 11/22/2022]
Abstract
In this study, we used a pig model to investigate the effects of α-solanine (a natural toxin found mainly in potato sprouts) on oocyte maturation, quality and subsequent embryonic development. We found that α-solanine (10 μM) disturbed meiotic resumption and increased abnormal spindle formation and altered the cortical granule (CG) distribution compared with the untreated group. α-Solanine triggered autophagy and apoptosis by increasing the expressions of autophagy-related genes (LC3, ATG7, and LAMP2) and apoptotic related genes (BAX and CASP3). Exposure of porcine oocytes to α-solanine significantly increased the levels of H3K36me3 and H3K27me3. Moreover, α-solanine significantly reduced the cleavage and blastocyst formation rates, decreased the total and inner cell mass cells numbers, and increased apoptosis in these porcine embryos. Taken together, our data indicate that α-solanine toxically impairs oocyte maturation and quality by triggering autophagy/apoptosis and facilitating epigenetic modifications. Furthermore, α-solanine suppressed subsequent embryonic development and reduced embryo quality.
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10
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Li X, Wang YK, Song ZQ, Du ZQ, Yang CX. Dimethyl Sulfoxide Perturbs Cell Cycle Progression and Spindle Organization in Porcine Meiotic Oocytes. PLoS One 2016; 11:e0158074. [PMID: 27348312 PMCID: PMC4922549 DOI: 10.1371/journal.pone.0158074] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2016] [Accepted: 06/09/2016] [Indexed: 12/01/2022] Open
Abstract
Meiotic maturation of mammalian oocytes is a precisely orchestrated and complex process. Dimethyl sulfoxide (DMSO), a widely used solvent, drug, and cryoprotectant, is capable of disturbing asymmetric cytokinesis of oocyte meiosis in mice. However, in pigs, DMSO’s effect on oocyte meiosis still remains unknown. We aimed to evaluate if DMSO treatment will affect porcine oocyte meiosis and the underlying molecular changes as well. Interestingly, we did not observe the formation of the large first polar body and symmetric division for porcine oocytes treated with DMSO, contrary to findings reported in mice. 3% DMSO treatment could inhibit cumulus expansion, increase nuclear abnormality, disturb spindle organization, decrease reactive oxygen species level, and elevate mitochondrial membrane potential of porcine oocytes. There was no effect on germinal vesicle breakdown rate regardless of DMSO concentration. 3% DMSO treatment did not affect expression of genes involved in spindle organization (Bub1 and Mad2) and apoptosis (NF-κB, Pten, Bcl2, Caspase3 and Caspase9), however, it significantly decreased expression levels of pluripotency genes (Oct4, Sox2 and Lin28) in mature oocytes. Therefore, we demonstrated that disturbed cumulus expansion, chromosome alignment, spindle organization and pluripotency gene expression could be responsible for DMSO-induced porcine oocyte meiotic arrest and the lower capacity of subsequent embryo development. Our results provide new insights on DMSO’s effect on porcine oocyte meiosis and raise safety concerns over DMSO’s usage on female reproduction in both farm animals and humans.
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Affiliation(s)
- Xuan Li
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, Heilongjiang, China
| | - Yan-Kui Wang
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, Heilongjiang, China
| | - Zhi-Qiang Song
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, Heilongjiang, China
| | - Zhi-Qiang Du
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, Heilongjiang, China
- * E-mail: (CXY); (ZQD)
| | - Cai-Xia Yang
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, Heilongjiang, China
- * E-mail: (CXY); (ZQD)
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Ferré P, Bui TMT, Wakai T, Funahashi H. Effect of removing cumulus cells from porcine cumulus-oocyte complexes derived from small and medium follicles during IVM on the apoptotic status and meiotic progression of the oocytes. Theriogenology 2016; 86:1705-10. [PMID: 27329157 DOI: 10.1016/j.theriogenology.2016.05.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Revised: 05/11/2016] [Accepted: 05/20/2016] [Indexed: 12/21/2022]
Abstract
The present study was undertaken to examine the apoptotic status and meiotic progression of oocytes from small follicle (SF; 0.5-2 mm in diameter) and medium follicle (MF; 3-6 mm in diameter) when the oocytes were denuded before, during, and after IVM. Cumulus-oocyte complexes (COCs) were collected from SF or MF of prepubertal gilt ovaries. Before or 20 hours after the start of IVM culture, some oocytes were denuded and cultured for IVM. At the end of IVM, apoptotic status and meiotic progression of the oocytes were compared with oocytes matured in the presence of cumulus cells (CCs) by Annexin-V/PI assay and 4',6-Diamidino-2-phenylindole staining. Apoptotic status of the oocytes was only affected by time when the oocytes were denuded. In both oocytes from SF and MF, although the incidence of early and late apoptotic oocytes was significantly higher when the CCs were removed before IVM, the rate was significantly lower when CCs were removed 20 and 44 hours after the start of IVM. The incidence of mature oocytes was significantly affected by both the origin of COCs and time when oocytes were denuded from the COCs. Although the percentage of mature oocytes was higher in MF than SF, maturation rates were significantly higher when oocytes were denuded 20 hours, as compared with 0 and 44 hours after the start of IVM. However, the percentage of mature oocytes with a morphologically normal spindle was significantly higher when oocytes were denuded 44 hours, rather than 22 hours of IVM. In conclusion, removing CCs 20 hours after the start of IVM seems to promote meiotic progression of the oocytes to the metaphase-II stage even when the COCs were collected from SF, although factor(s) from or communication with CCs during IVM may need to obtain a morphologically normal spindle in mature oocytes.
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Affiliation(s)
- Pilar Ferré
- Department of Animal Science, Graduate School of Environmental and Life Science, Okayama University, Okayama, Japan
| | - Tra Mi Thi Bui
- Department of Animal Science, Graduate School of Environmental and Life Science, Okayama University, Okayama, Japan
| | - Takuya Wakai
- Department of Animal Science, Graduate School of Environmental and Life Science, Okayama University, Okayama, Japan
| | - Hiroaki Funahashi
- Department of Animal Science, Graduate School of Environmental and Life Science, Okayama University, Okayama, Japan.
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12
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Liu Y, Wang H, Lu J, Miao Y, Cao X, Zhang L, Wu X, Wu F, Ding B, Wang R, Luo M, Li W, Tan J. Rex Rabbit Somatic Cell Nuclear Transfer with In Vitro-Matured Oocytes. Cell Reprogram 2016; 18:187-94. [PMID: 27159389 DOI: 10.1089/cell.2015.0086] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Somatic cell nuclear transfer (SCNT) requires large numbers of matured oocytes. In vitro-matured (IVM) oocytes have been used in SCNT in many animals. We investigated the use of IVM oocytes in Rex rabbit SCNT using Rex rabbit ovaries obtained from a local abattoir. The meiotic ability of oocytes isolated from follicles of different diameters was studied. Rex rabbit SCNT was optimized for denucleation, activation, and donor cell synchronization. Rex rabbit oocytes grew to the largest diameter (110 μm) when the follicle diameter was 1.0 mm. Oocytes isolated from <0.5-mm follicles lacked the ability to resume meiosis. More than 90% of these oocytes remained in the germinal vesicle (GV) stage after in vitro culture (IVC) for 18 h. Oocytes isolated from >0.7-mm follicles acquired maturation ability. More than 90% of these oocytes matured after IVC for 18 h. The developmental potential of oocytes isolated from >1-mm follicles was greater than that of oocytes isolated from 0.7- to 1.0-mm follicles. The highest activation rates for IVM Rex rabbit oocytes were seen after treatment with 2.5 μM ionomycin for 5 min followed by 2 mM 6-dimethylaminopurine (6-DMAP) and 5 μg/mL cycloheximide (CHX) for 1 h. Ionomycin induced the chromatin of IVM oocytes to protrude from the oocyte surface, promoting denucleation. Fetal fibroblast cells (FFCs) and cumulus cells (CCs) were more suitable for Rex rabbit SCNT than skin fibroblast cells (SFCs) (blastocyst rate was 35.6 ± 2.2% and 38.0 ± 6.0% vs. 19.7 ± 3.1%). The best fusion condition was a 2DC interval for 1 sec, 1.6 kV/cm voltages, and 40 μsec duration in 0.28 M mannitol. In conclusion, the in vitro maturation of Rex rabbit oocytes and SCNT procedures were studied systematically and optimized in this study.
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Affiliation(s)
- Yong Liu
- 1 Key Laboratory of Embryo Development and Reproductive Regulation of Anhui Province, College of Biological and Food Engineering, Fuyang Teachers College , Fuyang City, Anhui Province 236037, China
| | - Huili Wang
- 2 Laboratory for Animal Reproduction and Embryology, College of Animal Science and Veterinary Medicine, Shandong Agricultural University , Tai'an City, Shandong Province 271018, China
| | - Jinhua Lu
- 2 Laboratory for Animal Reproduction and Embryology, College of Animal Science and Veterinary Medicine, Shandong Agricultural University , Tai'an City, Shandong Province 271018, China
| | - Yiliang Miao
- 2 Laboratory for Animal Reproduction and Embryology, College of Animal Science and Veterinary Medicine, Shandong Agricultural University , Tai'an City, Shandong Province 271018, China
| | - Xinyan Cao
- 2 Laboratory for Animal Reproduction and Embryology, College of Animal Science and Veterinary Medicine, Shandong Agricultural University , Tai'an City, Shandong Province 271018, China
| | - Ling Zhang
- 1 Key Laboratory of Embryo Development and Reproductive Regulation of Anhui Province, College of Biological and Food Engineering, Fuyang Teachers College , Fuyang City, Anhui Province 236037, China
| | - Xiaoqing Wu
- 1 Key Laboratory of Embryo Development and Reproductive Regulation of Anhui Province, College of Biological and Food Engineering, Fuyang Teachers College , Fuyang City, Anhui Province 236037, China
| | - Fengrui Wu
- 1 Key Laboratory of Embryo Development and Reproductive Regulation of Anhui Province, College of Biological and Food Engineering, Fuyang Teachers College , Fuyang City, Anhui Province 236037, China
| | - Biao Ding
- 1 Key Laboratory of Embryo Development and Reproductive Regulation of Anhui Province, College of Biological and Food Engineering, Fuyang Teachers College , Fuyang City, Anhui Province 236037, China
| | - Rong Wang
- 1 Key Laboratory of Embryo Development and Reproductive Regulation of Anhui Province, College of Biological and Food Engineering, Fuyang Teachers College , Fuyang City, Anhui Province 236037, China
| | - Mingjiu Luo
- 2 Laboratory for Animal Reproduction and Embryology, College of Animal Science and Veterinary Medicine, Shandong Agricultural University , Tai'an City, Shandong Province 271018, China
| | - Wenyong Li
- 1 Key Laboratory of Embryo Development and Reproductive Regulation of Anhui Province, College of Biological and Food Engineering, Fuyang Teachers College , Fuyang City, Anhui Province 236037, China
| | - Jinghe Tan
- 2 Laboratory for Animal Reproduction and Embryology, College of Animal Science and Veterinary Medicine, Shandong Agricultural University , Tai'an City, Shandong Province 271018, China
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Epidermal growth factor enhances the developmental competence of yak (Bos grunniens) preimplantation embryos by modulating the expression of survivin and HSP70. Livest Sci 2015. [DOI: 10.1016/j.livsci.2015.11.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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