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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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Men NT, Dang-Nguyen TQ, Somfai T, Nguyen HT, Noguchi J, Kaneko H, Kikuchi K. Effect of nucleocytoplasmic ratio on the in vitro porcine embryo development after in vitro fertilization or parthenogenetic activation. ZYGOTE 2021;:1-7. [PMID: 34612188 DOI: 10.1017/S0967199421000381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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
This study was conducted to examine whether the nuclear to cytoplasmic (N/C) ratio had any influence on the timing of embryo compaction and blastocoel formation, as well as formation rate and quality of blastocyst. First, we produced embryos with increased N/C ratio by removal of approximately one-third of the cytoplasm and with decreased N/C ratio by doubling the oocyte cytoplasm with an enucleated oocyte. The initiation of compaction and cavitation in reduced cytoplasm group was significantly earlier (P < 0.05) compared with the control and doubled cytoplasm groups. The rate of blastocysts in the reduced cytoplasm and doubled cytoplasm groups was significantly lower (P < 0.05) compared with the control group. Blastocyst quality in terms of total cell number in the reduced cytoplasm group was significantly lower (P < 0.05) compared with the doubled cytoplasm group, but not different from the control group. Next, we produced embryos with various N/C ratios by oocyte fusion combined with cytochalasin D treatment. The onset of compaction and cavitation in the 2N/2C group (decreased N/C ratio) was significantly delayed (P < 0.05) or had the tendency to be delayed (P = 0.064), respectively, compared with the control group (2N/1C). A significantly higher rate of blastocyst was observed in the 4N/2C group compared with the 1N/1C group (P < 0.05) but not different from the remaining groups. These results demonstrated that an increase in N/C ratio caused an earlier occurrence of morula compaction and blastocyst formation in both in vitro fertilization (IVF) and parthenogenetically activated pig embryos.
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Abstract
Exportin 6, which functions specifically in the nuclear export of actin family proteins, has been reported to be absent in immature Xenopus oocytes, which have a huge
nucleus containing a large amount of actin. In mammalian oocytes, however, the presence and the function of exportin 6 remain uninvestigated. In this study, we assessed the expression and
effects of exportin 6 on meiotic resumption in porcine oocytes after cloning porcine exportin 6 cDNA and carrying out overexpression and expression inhibition by mRNA and antisense RNA
injection, respectively. We found for the first time that exportin 6 was expressed in mammalian full-grown germinal-vesicle-stage oocytes and was involved in the nuclear export of actin. In
contrast, exportin 6 was absent from the growing oocytes, which are meiotically incompetent and maintain the germinal-vesicle structure in the long term; the regulatory mechanism appeared to
be active degradation. We examined the effects of exportin 6 on meiotic resumption of porcine oocytes and noted that its expression did not affect the onset time but increased the rate of
germinal vesicle breakdown at 24 h via regulation of the nuclear actin level, which directly influences the physical strength of the germinal-vesicle membrane. Our results suggest that
exportin 6 affects the nuclear transport of actin and meiotic resumption in mammalian oocytes.
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Affiliation(s)
- Asuka Onuma
- Department of Animal Resource Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan
| | - Yoshie A Fujioka
- Department of Animal Resource Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan
| | - Wataru Fujii
- Department of Animal Resource Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan
| | - Koji Sugiura
- Department of Animal Resource Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan
| | - Kunihiko Naito
- Department of Animal Resource Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan
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Hwang IS, Park MR, Kwak TU, Park SH, Lim JH, Kim SW, Hwang S. Effect of Cytochalasin B Treatment on the Improvement of Survival Rate in Vitrified Pig Oocyte. Dev Reprod 2018; 22:245-252. [PMID: 30324161 PMCID: PMC6182226 DOI: 10.12717/dr.2018.22.3.245] [Citation(s) in RCA: 3] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Revised: 08/16/2018] [Accepted: 09/03/2018] [Indexed: 11/18/2022]
Abstract
To improve survival rates of vitrified pig oocytes, the treatment of cytoskeletal
stabilizer on an appropriate time is one of the possible approaches. However,
the exact treatment timing and effect of cytoskeletal stabilizer such as
cytochalasin B (CB) is not well known during oocyte vitrification procedures.
Thus, the present study was conducted to determine optimal treatment timing of
CB during vitrification and warming procedures. In experiment 1, the survival
rates of the post-warming pig oocytes were analyzed by fluorescein diacetate
(FDA) assays with 4 classifications. In results, post-warming oocytes showed
significantly (p<0.05) decreased number of alive oocytes
(31.8% vs. 86.4%) compared to fresh control. In detail, the significant
difference (p<0.05) was found only in strong
fluorescence (18.2% vs. 70.5%) not in intermediate fluorescence groups (13.6%
vs. 15.9%). In experiment 2, CB was treated before (CB-Vitri) and after
(Vitri-CB) vitrification. In results, group of Vitri-CB showed significantly
(p<0.05) higher (91.6%) survival rates compared to
group of CB-Vitri (83.7%), significantly (p<0.05) and
comparable with group of Vitri Control (88.7%) by morphological inspection. In
FDA assay results, group of Vitri-CB showed significantly
(p<0.05) higher (44.2%) survival rates compared to
groups of CB-Vitri (36.7%) and Vitri Control (35.1%). In conclusion, the
increased survival rates of post-warming pig oocyte treated with Vitri-CB method
are firstly described here. The main finding of present study is that the CB
treatment during recovery could be helpful to refresh the post-warming pig
oocyte resulting its improved survival rates.
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Affiliation(s)
- In-Sul Hwang
- Animal Biotechnology Division, National Institute of Animal Science, Wanju 55365, Korea
| | - Mi-Ryung Park
- Animal Biotechnology Division, National Institute of Animal Science, Wanju 55365, Korea
| | - Tae-Uk Kwak
- Animal Biotechnology Division, National Institute of Animal Science, Wanju 55365, Korea
| | - Sang-Hyun Park
- Animal Biotechnology Division, National Institute of Animal Science, Wanju 55365, Korea
| | - Ji-Hyun Lim
- Animal Biotechnology Division, National Institute of Animal Science, Wanju 55365, Korea
| | - Sung Woo Kim
- Animal Genetics Resources Research Center, National Institute of Animal Science, Namwon 55717, Korea
| | - Seongsoo Hwang
- Animal Biotechnology Division, National Institute of Animal Science, Wanju 55365, Korea
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Yuan B, Liang S, Jin YX, Kwon JW, Zhang JB, Kim NH. Progesterone influences cytoplasmic maturation in porcine oocytes developing in vitro. PeerJ 2016; 4:e2454. [PMID: 27672508 PMCID: PMC5028735 DOI: 10.7717/peerj.2454] [Citation(s) in RCA: 10] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Accepted: 08/17/2016] [Indexed: 12/11/2022] Open
Abstract
Progesterone (P4), an ovarian steroid hormone, is an important regulator of female reproduction. In this study, we explored the influence of progesterone on porcine oocyte nuclear maturation and cytoplasmic maturation and development in vitro. We found that the presence of P4 during oocyte maturation did not inhibit polar body extrusions but significantly increased glutathione and decreased reactive oxygen species (ROS) levels relative to that in control groups. The incidence of parthenogenetically activated oocytes that could develop to the blastocyst stage was higher (p < 0.05) when oocytes were exposed to P4 as compared to that in the controls. Cell numbers were increased in the P4-treated groups. Further, the P4-specific inhibitor mifepristone (RU486) prevented porcine oocyte maturation, as represented by the reduced incidence (p < 0.05) of oocyte first polar body extrusions. RU486 affected maturation promoting factor (MPF) activity and maternal mRNA polyadenylation status. In general, these data show that P4 influences the cytoplasmic maturation of porcine oocytes, at least partially, by decreasing their polyadenylation, thereby altering maternal gene expression.
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Affiliation(s)
- Bao Yuan
- Department of Laboratory Animal, College of Animal Sciences, Jilin university, Changchun, Jilin, P.R.China.,Department of Animal Sciences, Molecular Embryology Laboratory, Chungbuk National University, Cheongju, Chungbuk, Korea
| | - Shuang Liang
- Department of Animal Sciences, Molecular Embryology Laboratory, Chungbuk National University, Cheongju, Chungbuk, Korea
| | - Yong-Xun Jin
- Department of Laboratory Animal, College of Animal Sciences, Jilin university, Changchun, Jilin, P.R.China.,Department of Animal Sciences, Molecular Embryology Laboratory, Chungbuk National University, Cheongju, Chungbuk, Korea
| | - Jeong-Woo Kwon
- Department of Animal Sciences, Molecular Embryology Laboratory, Chungbuk National University, Cheongju, Chungbuk, Korea
| | - Jia-Bao Zhang
- Department of Laboratory Animal, College of Animal Sciences, Jilin university, Changchun, Jilin, P.R.China
| | - Nam-Hyung Kim
- Department of Laboratory Animal, College of Animal Sciences, Jilin university, Changchun, Jilin, P.R.China.,Department of Animal Sciences, Molecular Embryology Laboratory, Chungbuk National University, Cheongju, Chungbuk, Korea
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