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Jung S, Sul H, Oh D, Jung YG, Lee J, Hyun SH. Slow freezing cryopreservation of Korean bovine blastocysts with an additional sucrose pre-equilibration step. Front Vet Sci 2024; 11:1400899. [PMID: 38659455 PMCID: PMC11039926 DOI: 10.3389/fvets.2024.1400899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Accepted: 03/29/2024] [Indexed: 04/26/2024] Open
Abstract
Introduction Embryo cryopreservation is a valuable technique used for preserving genetic resources for long periods. However, the survival rate of embryos is dependent on the method used. Therefore, in this study, we evaluated the efficiency of slow freezing method but with an additional dehydration step prior to freezing to overcome the formation of ice crystals. Methods Oocytes collected from the ovaries of native Korean cattle subjected to in vitro fertilization were cultured for 7 days until the formation of expanded blastocysts. Before freezing, the blastocysts were placed in four pre-equilibration media: a control medium with no addition of sucrose, and three experimental media with the addition of 0.1, 0.25, and 0.5 M sucrose, respectively. Then, the pre-equilibrated embryos were frozen. Embryo survival and hatching rates were evaluated morphologically at 24, 48, and 72 h after thawing. Immunofluorescence staining, terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL) assay, and gene expression analysis of the re-expanded blastocytes were examined 24 h after freeze-thawing. Results The survival rate was significantly higher in the 0.1 M group than in the control group (p < 0.05), and the hatching rate at 72 h was significantly higher in the 0.25 and 0.5 M groups than in the control group (p < 0.05). TUNEL-positive cells were significantly lower in the 0.25 M group than in the control group (12.5 ± 0.9 vs. 8.3 ± 0.8; p < 0.05). The gene expression of BCL2 associated X, heat shock protein 70 kDa, and aquaporin 3 in the 0.25 M group was significantly lower than that in the control group (p < 0.05). Conclusion Our study revealed that treatment with 0.25 M sucrose before slow freezing improved the viability of bovine embryos after freeze-thawing.
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Affiliation(s)
- Seungki Jung
- Veterinary Medical Center and College of Veterinary Medicine, Laboratory of Veterinary Embryology and Biotechnology (VETEMBIO), Chungbuk National University, Cheongju, Republic of Korea
- ET Biotech Co. Ltd., Jangsu, Republic of Korea
| | | | - Dongjin Oh
- Veterinary Medical Center and College of Veterinary Medicine, Laboratory of Veterinary Embryology and Biotechnology (VETEMBIO), Chungbuk National University, Cheongju, Republic of Korea
- Institute of Stem Cell and Regenerative Medicine (ISCRM), Chungbuk National University, Cheongju, Republic of Korea
| | | | - Joohyeong Lee
- Department of Companion Animal Industry, Semyung University, Jecheon, Republic of Korea
| | - Sang-Hwan Hyun
- Veterinary Medical Center and College of Veterinary Medicine, Laboratory of Veterinary Embryology and Biotechnology (VETEMBIO), Chungbuk National University, Cheongju, Republic of Korea
- Institute of Stem Cell and Regenerative Medicine (ISCRM), Chungbuk National University, Cheongju, Republic of Korea
- Graduate School of Veterinary Biosecurity and Protection, Chungbuk National University, Cheongju, Republic of Korea
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Mo L, Ma J, Xiong Y, Xiong X, Lan D, Li J, Yin S. Factors Influencing the Maturation and Developmental Competence of Yak ( Bos grunniens) Oocytes In Vitro. Genes (Basel) 2023; 14:1882. [PMID: 37895231 PMCID: PMC10606142 DOI: 10.3390/genes14101882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 09/17/2023] [Accepted: 09/25/2023] [Indexed: 10/29/2023] Open
Abstract
The yak (Bos grunniens) is a unique breed living on the Qinghai-Tibet Plateau and its surrounding areas, providing locals with a variety of vital means of living and production. However, the yak has poor sexual maturity and low fertility. High-quality mature oocytes are the basis of animal breeding technology. Recently, in vitro culturing of oocytes and embryo engineering technology have been applied to yak breeding. However, compared to those observed in vivo, the maturation rate and developmental capacity of in vitro oocytes are still low, which severely limits the application of in vitro fertilization and embryo production in yaks. This review summarizes the endogenous and exogenous factors affecting the in vitro maturation (IVM) and developmental ability of yak oocytes reported in recent years and provides a theoretical basis for obtaining high-quality oocytes for in vitro fertilization and embryo production in yaks.
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Affiliation(s)
- Luoyu Mo
- College of Animal and Veterinary Sciences, Southwest Minzu University, Chengdu 610041, China; (L.M.); (J.M.); (Y.X.); (X.X.); (D.L.); (J.L.)
| | - Jun Ma
- College of Animal and Veterinary Sciences, Southwest Minzu University, Chengdu 610041, China; (L.M.); (J.M.); (Y.X.); (X.X.); (D.L.); (J.L.)
| | - Yan Xiong
- College of Animal and Veterinary Sciences, Southwest Minzu University, Chengdu 610041, China; (L.M.); (J.M.); (Y.X.); (X.X.); (D.L.); (J.L.)
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Ministry of Education, Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization Key Laboratory of Sichuan Province, Chengdu 610041, China
- Key Laboratory of Animal Science of National Ethnic Affairs Commission of China, Southwest Minzu University, Chengdu 610041, China
| | - Xianrong Xiong
- College of Animal and Veterinary Sciences, Southwest Minzu University, Chengdu 610041, China; (L.M.); (J.M.); (Y.X.); (X.X.); (D.L.); (J.L.)
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Ministry of Education, Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization Key Laboratory of Sichuan Province, Chengdu 610041, China
- Key Laboratory of Animal Science of National Ethnic Affairs Commission of China, Southwest Minzu University, Chengdu 610041, China
| | - Daoliang Lan
- College of Animal and Veterinary Sciences, Southwest Minzu University, Chengdu 610041, China; (L.M.); (J.M.); (Y.X.); (X.X.); (D.L.); (J.L.)
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Ministry of Education, Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization Key Laboratory of Sichuan Province, Chengdu 610041, China
- Key Laboratory of Animal Science of National Ethnic Affairs Commission of China, Southwest Minzu University, Chengdu 610041, China
| | - Jian Li
- College of Animal and Veterinary Sciences, Southwest Minzu University, Chengdu 610041, China; (L.M.); (J.M.); (Y.X.); (X.X.); (D.L.); (J.L.)
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Ministry of Education, Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization Key Laboratory of Sichuan Province, Chengdu 610041, China
- Key Laboratory of Animal Science of National Ethnic Affairs Commission of China, Southwest Minzu University, Chengdu 610041, China
| | - Shi Yin
- College of Animal and Veterinary Sciences, Southwest Minzu University, Chengdu 610041, China; (L.M.); (J.M.); (Y.X.); (X.X.); (D.L.); (J.L.)
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Ministry of Education, Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization Key Laboratory of Sichuan Province, Chengdu 610041, China
- Key Laboratory of Animal Science of National Ethnic Affairs Commission of China, Southwest Minzu University, Chengdu 610041, China
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Effect of nucleocytoplasmic ratio on the in vitro porcine embryo development after in vitro fertilization or parthenogenetic activation. ZYGOTE 2021; 30:298-304. [PMID: 34612188 DOI: 10.1017/s0967199421000381] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [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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Yang L, Zhao Z, Cui M, Zhang L, Li Q. Melatonin Restores the Developmental Competence of Heat Stressed Porcine Oocytes, and Alters the Expression of Genes Related to Oocyte Maturation. Animals (Basel) 2021; 11:ani11041086. [PMID: 33920315 PMCID: PMC8069948 DOI: 10.3390/ani11041086] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 04/06/2021] [Accepted: 04/08/2021] [Indexed: 01/31/2023] Open
Abstract
Simple Summary Melatonin improves the quality and in vitro maturation (IVM) of oocytes under heat stress. Melatonin treatment counteracts the adverse effects induced by heat stress (HS), such as the poor survival rate and maturation rate, distribution of α-tubulin and F-actin, expression of NRF2 and GDF9 mRNA. However, HS and melatonin have similar effects on increasing expression of HSP70 and NRF2 mRNA. Furthermore, HS inhibits expression of GDF9 mRNA. Abstract Melatonin enhances the quality and in vitro maturation (IVM) of oocytes under heat stress (HS), but the mechanism of melatonin in reducing HS injury on oocytes is not fully understood. In this study, porcine cumulus-oocyte complexes (COCs) were randomly divided into three groups. The COCs of the control group were cultured at 38.5 °C for 42 h, and the COCs of the HS group were cultured at 41.5 °C for 4 h, and then transferred into 38.5 °C for 38 h. The COCs of the HS + melatonin group were cultured with 10−9 M melatonin under the same conditions as the HS group. The survival rate, maturation rate, distribution of α-tubulin and F-actin of the oocytes were assessed. In addition, the expression profiles for genes related to the oocyte maturation, including heat shock protein 70 (HSP70), nuclear factor erythroid 2-related factor 2 (NRF2), cyclin-dependent kinase 1 (CDK1), growth differentiation factor 9 (GDF9) were analyzed by real-time quantitative PCR. The results showed that HS decreased the survival rate and maturation rate, distribution of α-tubulin and F-actin, but melatonin treatment could partly counteract these adverse effects. In addition, HS increased expression of HSP70 and NRF2 mRNA, and melatonin treatment had a similar effect on HSP70 expression, but had a contrary effect on NRF2 expression. Furthermore, HS inhibited expression of CDK1 and GDF9 mRNA, but melatonin treatment could weaken the effect on GDF9 expression induced by HS. In summary, melatonin treatment could attenuate the unfavorable effects induced by HS to enhance developmental competence of porcine oocytes during IVM.
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Affiliation(s)
- Ling Yang
- School of Life Sciences and Food Engineering, Hebei University of Engineering, Handan 056038, China; (L.Y.); (Z.Z.); (L.Z.)
| | - Zimo Zhao
- School of Life Sciences and Food Engineering, Hebei University of Engineering, Handan 056038, China; (L.Y.); (Z.Z.); (L.Z.)
- Animal Husbandry and Veterinary Research Institute of Tianjin, Tianjin 300412, China;
| | - Maosheng Cui
- Animal Husbandry and Veterinary Research Institute of Tianjin, Tianjin 300412, China;
- Correspondence:
| | - Leying Zhang
- School of Life Sciences and Food Engineering, Hebei University of Engineering, Handan 056038, China; (L.Y.); (Z.Z.); (L.Z.)
| | - Qianjun Li
- Animal Husbandry and Veterinary Research Institute of Tianjin, Tianjin 300412, China;
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Doubling of the cytoplasm volume improves the developmental competence of porcine oocytes injected with freeze-dried somatic cells. Cryobiology 2020; 97:131-137. [PMID: 32986988 DOI: 10.1016/j.cryobiol.2020.09.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 09/23/2020] [Accepted: 09/24/2020] [Indexed: 11/24/2022]
Abstract
In the present study using pig cells, we examined the effect of the cryoprotectant trehalose on the DNA integrity of freeze-dried cells. We then investigated whether donor cell types and storage duration had impact on DNA integrity in freeze-dried cells or developmental competence of oocytes injected with freeze-dried somatic cells. We also examined whether double cytoplasm nuclear transfer (DCNT) would improve developmental competence of such oocytes. Furthermore, using a PCR-based method for sex identification, we determined whether the blastocysts obtained had actually been generated from the freeze-dried cells. It was found that, for a short storage duration at low temperature, trehalose had no beneficial effect on protection from DNA damage, and that donor cell type had no effect on the DNA integrity of freeze-dried somatic cells or the developmental competence of oocytes injected with them. We also confirmed that all of the blastocysts obtained following nuclear transfer were of freeze-dried somatic cell origin. Storage of freeze-dried somatic cells for up to 1 year at low temperature did not degrade DNA integrity in comparison with storage for 1 month, 1 week or 1 day. Following injection of freeze-dried cells, the proportion of oocytes that developed to blastocysts after storage for up to 1 year was similar to that after storage for 1 month, 1 week or 1 day. Moreover, DCNT significantly improved the developmental competence of oocytes treated in this way. In summary, using DCNT, we have demonstrated that freeze-dried porcine somatic cells subjected to long-term storage at 4 °C have nearly the same potential to develop to blastocysts as non-freeze-dried cells.
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In vitro Production of Porcine Embryos: Current Status and Possibilities – A Review. ANNALS OF ANIMAL SCIENCE 2020. [DOI: 10.2478/aoas-2020-0030] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Abstract
This paper presents the current possibilities, state of knowledge and prospects of in vitro production (IVP) of pig embryos, which consists of in vitro oocyte maturation, in vitro fertilization and in vitro embryo culture. In pigs, oocyte maturation is one of the most important stages in the embryo IVP process. It determines the oocyte’s fertilization ability as well as its embryonic development. Through many research studies of the proper selection of oocytes and appropriate maturation medium composition (especially the addition of various supplements), the in vitro maturation of pig oocytes has been significantly improved. Recent studies have demonstrated that modifications of the diluents and in vitro fertilization media can reduce polyspermy. Furthermore, several adjustments of the porcine culture media with the addition of some supplements have enhanced the embryo quality and developmental competence. These updates show the progress of IVP in pigs that has been achieved; however, many problems remain unsolved.
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Influence of oocyte selection, activation with a zinc chelator and inhibition of histone deacetylases on cloned porcine embryo and chemically activated oocytes development. ZYGOTE 2020; 28:286-290. [PMID: 32285760 DOI: 10.1017/s0967199419000856] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The aim of this study was to evaluate the effects of alternative protocols to improve oocyte selection, embryo activation and genomic reprogramming on in vitro development of porcine embryos cloned by somatic cell nuclear transfer (SCNT). In Experiment 1, in vitro-matured oocytes were selected by exposure to a hyperosmotic sucrose solution prior to micromanipulation. In Experiment 2, an alternative chemical activation protocol using a zinc chelator as an adjuvant (ionomycin + N,N,N',N'-tetrakis(2-pyridylmethyl)ethylenediamine (TPEN) + N-6-dimethylaminopurine (6-DMAP)) was compared with a standard protocol (ionomycin + 6-DMAP) for the activation of porcine oocytes or SCNT embryos. In Experiment 3, presumptive cloned zygotes were incubated after chemical activation in a histone deacetylase inhibitor (Scriptaid) for 15 h, with the evaluation of embryo yield and total cell number in day 7 blastocysts. In Experiment 1, cleavage rates tended to be higher in sucrose-treated oocytes than controls (123/199, 61.8% vs. 119/222, 53.6%, respectively); however, blastocyst rates were similar between groups. In Experiment 2, cleavage rates were higher in zygotes treated with TPEN than controls but no difference in blastocyst rates between groups occurred. For Experiment 3, the exposure to Scriptaid did not improve embryo development after cloning. Nevertheless, the total number of cells was higher in cloned zygotes treated with Scriptaid than SCNT controls. In conclusion, oocyte selection by sucrose as well as treatments with zinc chelator and an inhibitor of histone deacetylases did not significantly improve blastocyst yield in cloned and parthenotes. However, the histone deacetylases inhibitor produced a significant improvement in the blastocyst quality.
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Haraguchi S, Dang-Nguyen TQ, Wells D, Fuchimoto D, Fukuda T, Tokunaga T. Establishment of porcine nuclear transfer-derived embryonic stem cells using induced pluripotent stem cells as donor nuclei. J Reprod Dev 2020; 66:163-174. [PMID: 31983707 PMCID: PMC7175389 DOI: 10.1262/jrd.2019-137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We investigated whether sequential reprogramming via porcine induced pluripotent stem cells (piPSCs) or exposure to oocyte cytoplasm following nuclear transfer could generate nuclear transfer-derived ESCs (piPSCs-ntESCs). Nuclear transfer embryos were reconstructed with piPSCs possessing a ZsGreen fluorescent marker for expression of exogenous Nanog and Lin28. Reconstructed oocytes developed to morphologically normal 8-cell/morulae (35/93, 37.6%) and blastocysts (12/93, 12.9%). Although most green fluorescent protein-positive blastocysts showed efficient outgrowth (8/10, 80%), none formed primary colonies and all cultures degenerated. Conversely, 15% of fluorescent positive 8-cell/morula stage embryos showed outgrowth (6/40), with three forming primary colonies (7.5%). All three were expanded and maintained as piPSC-ntESC lines. These cell lines expressed stem cell marker genes and proteins. Despite inactivation of one X chromosome, all piPSC-ntESC lines formed teratomas comprising derivatives from all three embryonic germ layers. Strong SSEA1, 3, and 4 expression was detected at the 8-cell/morula stage in embryos reconstructed from both piPSCs and porcine embryonic fibroblasts (PEFs). SSEA3 was notably absent from IVF controls at pre-implantation embryo stages. Finally, we attempted to establish ntESCs from 8-cell/morulae reconstructed with PEFs using the same culture conditions as those for piPSC-ntESC derivation. Although eight primary colonies arose from 107 embryos (7.5%), they all degenerated after the first passage culture. Early and sustained expression of key reprogramming regulatory factors may be critical for pluripotent stem cell derivation to derive piPSC-ntESCs from 8-cell/morula stages, while the expression of SSEAs may be involved in the initial stem cell colony formation phases.
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Affiliation(s)
- Seiki Haraguchi
- Animal Biotechnology Unit, Institute of Agrobiological Sciences, NARO, Ibaraki 305-0901, Japan
| | - Thanh Quang Dang-Nguyen
- Reproductive Biology Unit, Institute of Agrobiological Sciences, NARO, Ibaraki 305-0901, Japan
| | - David Wells
- AgResearch, Ruakura Research Centre, Hamilton, New Zealand
| | - Daiichiro Fuchimoto
- Animal Biotechnology Unit, Institute of Agrobiological Sciences, NARO, Ibaraki 305-0901, Japan
| | - Tomokazu Fukuda
- Laboratory of Cell Engineering and Molecular Genetics, Iwate University, Iwate 020-8550, Japan
| | - Tomoyuki Tokunaga
- Animal Biotechnology Unit, Institute of Agrobiological Sciences, NARO, Ibaraki 305-0901, Japan
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Dang-Nguyen TQ, Wells D, Haraguchi S, Men NT, Nguyen HT, Noguchi J, Kaneko H, Kikuchi K. Combined refinements to somatic cell nuclear transfer methods improve porcine embryo development. J Reprod Dev 2020; 66:281-286. [PMID: 32173679 PMCID: PMC7297629 DOI: 10.1262/jrd.2019-156] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
The discovery of how to utilize CRISPR (clustered, regularly interspaced, short, palindromic repeats)-Cas (CRISPR-associated) systems for genome modification has accelerated
development of the field of genome editing, especially in large animals such as pigs. The low efficiency of somatic cell nuclear transfer (SCNT) is now becoming a major obstacle in
the production of genome-edited animals via cell-mediated approaches and improving efficacy of this technique is crucial. In this study, we propose a few simple modifications to a
zona-free SCNT protocol that are effective to produce numerous high-quality blastocysts. To refine the SCNT protocol we modified the following steps/factors: 1) culture medium for
SCNT embryos, 2) chemical treatment to prevent precocious activation of the manipulated/reconstructed oocytes and 3) donor cell serum starvation treatment. Although changes in each
of these steps only resulted in small improvements, the combination of all modifications altogether significantly enhanced developmental competence of SCNT embryos. Our modified
method yielded approximately three times greater blastocyst formation rates. Moreover, resulting blastocysts had roughly twice as many cells as compared to blastocysts produced by
the conventional SCNT method. With these significant in vitro improvements, our refined SCNT method is potentially suited for use in the production of genome
edited pigs.
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Affiliation(s)
- Thanh Quang Dang-Nguyen
- Institute of Agrobiological Sciences, National Agriculture and Food Research Organization (NARO), Ibaraki 305-8602, Japan
| | - David Wells
- AgResearch Ltd., Ruakura Research Centre, Hamilton, New Zealand
| | - Seiki Haraguchi
- Institute of Agrobiological Sciences, National Agriculture and Food Research Organization (NARO), Ibaraki 305-8602, Japan
| | - Nguyen Thi Men
- Institute of Agrobiological Sciences, National Agriculture and Food Research Organization (NARO), Ibaraki 305-8602, Japan
| | - Hiep Thi Nguyen
- Institute of Agrobiological Sciences, National Agriculture and Food Research Organization (NARO), Ibaraki 305-8602, Japan.,The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi 753-8515, Japan.,Institute of Biotechnology, Vietnam Academy of Science and Technology, Hanoi, Vietnam
| | - Junko Noguchi
- Institute of Agrobiological Sciences, National Agriculture and Food Research Organization (NARO), Ibaraki 305-8602, Japan
| | - Hiroyuki Kaneko
- Institute of Agrobiological Sciences, National Agriculture and Food Research Organization (NARO), Ibaraki 305-8602, Japan
| | - Kazuhiro Kikuchi
- Institute of Agrobiological Sciences, National Agriculture and Food Research Organization (NARO), Ibaraki 305-8602, Japan.,The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi 753-8515, Japan
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Chen Z, Zhang Z, Guo X, Memon K, Panhwar F, Wang M, Cao Y, Zhao G. Sensing Cell Membrane Biophysical Properties for Detection of High Quality Human Oocytes. ACS Sens 2019; 4:192-199. [PMID: 30584760 DOI: 10.1021/acssensors.8b01215] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Oocyte quality plays a crucial role in the early development and implantation of the embryos, and consequently has a profound impact on the accomplishment of assisted reproductive technology (ART). A simple and efficient method for detecting high-quality human oocytes is urgently needed. However, the clinically used morphological method is time-consuming, subjective, and inaccurate. To this end, we propose a practical and effective approach for detecting high-quality oocytes via on-chip measurement of the oocyte membrane permeability. We found that oocytes can be divided into two subpopulations (high-quality versus poor-quality oocytes) according to their membrane permeability differences, and as was further confirmed by subsequent in vitro fertilization (IVF) and development experiments (the blastocyst rates of high-quality and poor-quality oocytes were 60% and 0%, respectively). This approach shows great potentials in improving the success of ART, including both the fertilization and development rates, and thus it may have wide applications in the clinic.
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Affiliation(s)
- Zhongrong Chen
- Department of Electronic Science and Technology, University of Science and Technology of China, Hefei 230027, Anhui, China
| | - Zhiguo Zhang
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, Anhui, China
- Anhui Province Key Laboratory of Reproductive Health and Genetics, Anhui Provincial Engineering Technology Research Center for Biopreservation and Artificial Organs, Anhui Medical University, Hefei 230022, Anhui, China
| | - Xiaojie Guo
- Hefei Blood Center, Hefei 230031, Anhui, China
| | - Kashan Memon
- Department of Electronic Science and Technology, University of Science and Technology of China, Hefei 230027, Anhui, China
| | - Fazil Panhwar
- Department of Electronic Science and Technology, University of Science and Technology of China, Hefei 230027, Anhui, China
| | - Meng Wang
- Department of Electronic Science and Technology, University of Science and Technology of China, Hefei 230027, Anhui, China
| | - Yunxia Cao
- Reproductive Medicine Center, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, Anhui, China
- Anhui Province Key Laboratory of Reproductive Health and Genetics, Anhui Provincial Engineering Technology Research Center for Biopreservation and Artificial Organs, Anhui Medical University, Hefei 230022, Anhui, China
| | - Gang Zhao
- Department of Electronic Science and Technology, University of Science and Technology of China, Hefei 230027, Anhui, China
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Simple separation of good quality bovine oocytes using a microfluidic device. Sci Rep 2018; 8:14273. [PMID: 30250059 PMCID: PMC6155318 DOI: 10.1038/s41598-018-32687-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 09/13/2018] [Indexed: 12/02/2022] Open
Abstract
We fabricated a simple microfluidic device for separation of bovine oocytes based on the oocyte quality to improve the conception rate of in vitro fertilization (IVF) by using good quality oocytes. The microfluidic device separates oocytes based on sedimentation rate differences in a sucrose buffer, which is dependent on oocyte quality. The microfluidic device has a 700 µm width, 1 mm height, and 10 mm long separation channel. Oocytes were injected from the upper half of the separation channel, and they flowed while sinking. The outlets of the separation channel were divided into upper and lower chambers. Good quality oocytes settled faster than poor quality oocytes in sucrose buffer; therefore, good quality oocytes were collected from the lower outlet. We performed IVF after the microfluidic separation of oocytes. The developmental rate to blastocysts of oocytes collected from the lower outlet was significantly higher than those collected from the upper outlet (36.0% vs. 14.1%). This result was comparable to that in the BCB staining method performed as a comparison method (BCB+ : 35.7%, BCB−: 15.4%). These findings indicate that our microfluidic device could be applied to oocyte separation and contribute to improvement of in vitro embryo production system.
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Dang-Nguyen TQ, Nguyen HT, Somfai T, Wells D, Men NT, Viet-Linh N, Noguchi J, Kaneko H, Kikuchi K, Nagai T. Sucrose assists selection of high-quality oocytes in pigs. Anim Sci J 2018; 89:880-887. [PMID: 29671923 PMCID: PMC6001789 DOI: 10.1111/asj.13015] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Accepted: 02/05/2018] [Indexed: 11/28/2022]
Abstract
We investigated whether high‐quality in vitro matured (IVM) oocytes can be distinguished from poor ones based on the morphological changes after treatment with hyperosmotic medium containing 0.2 mol/L sucrose in pigs. We hypothesize that IVM oocytes maintaining round shape have higher quality than mis‐shapened oocytes following dehydration. Oocyte quality was verified by determining embryonic developmental competence using in vitro fertilization, nuclear transfer and parthenogenetic activation. In all cases, the round oocytes had greater (p < .05) developmental competence than that of mis‐shapened oocytes in terms of blastocyst rate and total cell number in blastocysts obtained after 6 days of in vitro culture. We also confirm that round aged oocytes are higher in quality than mis‐shapened aged oocytes. In an attempt to find out why high‐quality oocytes maintain a round shape whereas poorer oocytes become mis‐shapened following sucrose treatment, we examined the arrangement of actin microfilaments and microtubules. Abnormal organization of these cytoskeletal components was higher (p < .05) in mis‐shapened oocytes compared to round oocytes after 52 hr of IVM. In conclusion, sucrose treatment helps selection of high‐quality oocytes, including aged oocytes, in pigs. Abnormal cytoskeleton arrangements partly explain for low developmental competence of mis‐shapened oocytes.
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Affiliation(s)
- Thanh Quang Dang-Nguyen
- Institute of Agrobiological Sciences, National Agriculture and Food Research Organization (NARO), Tsukuba, Ibaraki, Japan
| | - Hiep Thi Nguyen
- Institute of Agrobiological Sciences, National Agriculture and Food Research Organization (NARO), Tsukuba, Ibaraki, Japan.,The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi City, Yamaguchi, Japan.,Institute of Biotechnology, Vietnam, Academy of Science and Technology, Hanoi, Vietnam
| | - Tamas Somfai
- Institute of Livestock and Grassland Science, NARO, Tsukuba, Ibaraki, Japan
| | - David Wells
- AgResearch Ltd., Ruakura Research Centre, Hamilton, New Zealand
| | - Nguyen Thi Men
- Institute of Agrobiological Sciences, National Agriculture and Food Research Organization (NARO), Tsukuba, Ibaraki, Japan
| | - Nguyen Viet-Linh
- Institute of Biotechnology, Vietnam, Academy of Science and Technology, Hanoi, Vietnam
| | - Junko Noguchi
- Institute of Agrobiological Sciences, National Agriculture and Food Research Organization (NARO), Tsukuba, Ibaraki, Japan
| | - Hiroyuki Kaneko
- Institute of Agrobiological Sciences, National Agriculture and Food Research Organization (NARO), Tsukuba, Ibaraki, Japan
| | - Kazuhiro Kikuchi
- Institute of Agrobiological Sciences, National Agriculture and Food Research Organization (NARO), Tsukuba, Ibaraki, Japan.,The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi City, Yamaguchi, Japan
| | - Takashi Nagai
- Department of Research Planning and Coordination, NARO, Tsukuba, Japan
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