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Hossein MS, Son YB, Jeong YI, Kang M, Lee S, Tinson A, Hwang WS. Case report: Spontaneous abortion of monoamniotic twins at the third trimester of pregnancy in Camelus dromedarius. Front Vet Sci 2023; 10:1273791. [PMID: 38111734 PMCID: PMC10725982 DOI: 10.3389/fvets.2023.1273791] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Accepted: 11/14/2023] [Indexed: 12/20/2023] Open
Abstract
Monoamniotic twins develop when a blastocyst spontaneously splits its progenitor cells, and each group of progenitor cells independently grows to become an individual. It is the rarest type of twin pregnancy and usually has significant developmental or congenital abnormalities, a higher rate of abortion, perinatal morbidity, and mortality. There is no information regarding monoamniotic twins in livestock species. Here, we reported a spontaneous abortion of monoamniotic twins in a dromedary camel at 278 days of gestation. Gonadorelin acetate (100 μg) was injected intramuscularly to induce ovulation in the recipient. A 7 days-old embryo produced by somatic cell nuclear transfer was transferred transcervically to the recipient. Early pregnancy was confirmed by an elevated level of serum progesterone followed by ultrasonography at 22 and 44 days after embryo transfer. A single sac was observed on 22 days while twins were evident 44 days after embryo transfer. Pregnancy was periodically monitored by the tail-up phenomenon. A ruptured fetal sac was observed on the ground having two fetuses. On autopsy, full-grown fetuses were found. Their bodies were separated. There was no congenital anomaly or any malformation in the fetuses. According to the reported chronology in human twins, we hypothesized that the blastocyst splitted before 13 days as it was monoamniotic and not conjoined. If the embryo splits within 4 to 8 days, it develops two amniotic sacs, and splitting after 13 days develops conjoined fetuses. To the authors' knowledge, this is the first reported case of monoamniotic twin abortion in dromedary camels. This report will increase awareness among practicing veterinarians and camel breeders about twin abortions.
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Affiliation(s)
| | - Young-Bum Son
- UAE Biotech Research Center, Abu Dhabi, United Arab Emirates
- Department of OBS/Theriogenology, College of Veterinary Medicine, Chonnam National University, Gwangju, Republic of Korea
| | - Yeon Ik Jeong
- UAE Biotech Research Center, Abu Dhabi, United Arab Emirates
| | - Mina Kang
- UAE Biotech Research Center, Abu Dhabi, United Arab Emirates
| | - Seejin Lee
- UAE Biotech Research Center, Abu Dhabi, United Arab Emirates
| | - Alex Tinson
- Hilli E.T. Cloning and Surgical Centre Presidential Camels and Camel Racing Affairs, Al-Ain, United Arab Emirates
| | - Woo Suk Hwang
- UAE Biotech Research Center, Abu Dhabi, United Arab Emirates
- Hilli E.T. Cloning and Surgical Centre Presidential Camels and Camel Racing Affairs, Al-Ain, United Arab Emirates
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Hossein MS, Son YB, Jeong YW, Jeong YI, Kang MN, Choi EJ, Park KB, Bae YR, Kim DY, Hwang WS. Production of transgenic first filial puppies expressing mutated human amyloid precursor protein gene. Front Vet Sci 2023; 10:1227202. [PMID: 37964915 PMCID: PMC10642565 DOI: 10.3389/fvets.2023.1227202] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 10/03/2023] [Indexed: 11/16/2023] Open
Abstract
Propagation of transgenic animals by germline transmission using assisted reproductive technologies such as in vitro fertilization (IVF) is the most efficient way to produce transgenic colonies for biomedical research. The objective of this study was to generate transgenic puppies from a founder dog expressing the mutated human amyloid precursor protein (mhAPP) gene. Experiment I assessed the characteristics of the semen prepared by freshly diluted, swim-up, and Percoll gradient methods using a computer-assisted semen analyzer (CASA). Motile and progressively motile sperm counts were higher in the Percoll gradient samples (p < 0.05) than in the swim-up and freshly diluted samples. In Experiment II, a total of 59, 70, and 65 presumptive zygotes produced by fresh, Percoll gradient, and swim-up methods, respectively, were transferred to surrogates (5 for each group); the Percoll gradient (27.27%) and swim-up samples (14.29%) showed the highest blastocyst formation rates, while fresh diluted semen did not produce any blastocyst. Experiment III examined the full-term developmental ability of embryos. Among the 5 surrogates in the Percoll gradient group, one (20.0%) became pregnant; it had 4 (6.15%) sacs and delivered 4 (6.15%; 2 males and 2 females) live puppies. Among the 4 puppies, 2 (50.0%) were found to transmit the transgene on their nail and toe under GFP fluorescence. Furthermore, the integration and expression of the mhAPP transgene were examined in the umbilical cords of all the IVF-derived puppies, and the presence of the transgene was only observed in the GFP-positive puppies. Thus, semen prepared by the Percoll method could generate transgenic puppies by male germline transmission using the IVF technique. Our result will help propagate transgenic dogs efficiently, which will foster human biomedical research.
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Affiliation(s)
| | - Young-Bum Son
- UAE Biotech Research Centre, Abu Dhabi, United Arab Emirates
- Department of Obstetrics, College of Veterinary Medicine, Chonnam National University, Gwangju, Republic of Korea
| | - Yeon Woo Jeong
- UAE Biotech Research Centre, Abu Dhabi, United Arab Emirates
- Department of Companion Animal and Animal Resources Science, Joongbu University, Geumsan-gun, Republic of Korea
| | - Yeon Ik Jeong
- UAE Biotech Research Centre, Abu Dhabi, United Arab Emirates
| | - Mi Na Kang
- UAE Biotech Research Centre, Abu Dhabi, United Arab Emirates
| | - Eun Ji Choi
- UAE Biotech Research Centre, Abu Dhabi, United Arab Emirates
| | - Kang Bae Park
- UAE Biotech Research Centre, Abu Dhabi, United Arab Emirates
| | - Yu Ra Bae
- UAE Biotech Research Centre, Abu Dhabi, United Arab Emirates
| | - Dae Young Kim
- Department of Life Science, College of Bio-nano Technology, Gachon University, Seongnam, Republic of Korea
| | - Woo Suk Hwang
- UAE Biotech Research Centre, Abu Dhabi, United Arab Emirates
- Department of Biology, North-Eastern Federal University, Yakutsk, Russia
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Mansour N, Lamghari F, Nasef M, Al Busaidi TM, Hossein MS, Jeong YI, Kang M, Kim H, Bae Y, Eum BH, Jeong YW, Hwang WS. Effect of the interval from GnRH administration after ovarian super-stimulation on the recovered oocytes, and effect of the transferred cloned blastocysts on the pregnancy rate and pregnancy loss in dromedary camel. Theriogenology 2023; 208:1-7. [PMID: 37290143 DOI: 10.1016/j.theriogenology.2023.05.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 05/05/2023] [Accepted: 05/10/2023] [Indexed: 06/10/2023]
Abstract
The present study was conducted to evaluate the number and maturity of the recovered oocytes after two intervals of in-vivo maturation. In addition to evaluating the effect of the developmental stage, as well as the number of cloned transferred blastocysts on the pregnancy rate and early pregnancy loss (EPL) in dromedary camel. The donor animals (n = 52) were super-stimulated using a single injection of 3000 IU of eCG followed by GnRH administration for oocyte maturation. Cumulus oocyte complexes (COCs) were collected by transvaginal ultrasound-guided aspiration (OPU) either 24-26 h or 18-20 h after GnRH administration. A fewer number of COCs with a lower percentage of oocyte maturity was observed at 24-26 h in comparison to 18-20 h. The effect of the cloned blastocysts' transferred number and developmental stage on the pregnancy rate and EPL was investigated. The total pregnancy rates at 10 days post-ET, 1 and 2 months were 21.9, 12.4, and 8.6%, respectively. Transfer of two or 3-4 embryos per surrogate was accompanied with a higher pregnancy rate at 1 and 2 months than a single embryo transfer. Rates of EPL were 43.5 and 60.1% at 1 and 2 months of pregnancy, respectively. The transfer of two embryos per surrogate was associated with a lower rate of EPL than ET of a single embryo at 1 and 2 months of pregnancy. Also, the ET of 3-4 embryos per surrogate showed a higher rate of EPL than the ET of two embryos at 2 months of pregnancy. ET of hatching (HG) blastocysts showed higher pregnancy rates and fewer EPL than ET of unhatched (UH) or fully hatched (HD) cloned blastocysts at 1 and 2 months of pregnancy. In conclusion, a high number of in-vivo matured oocytes can be recovered by ultrasound-guided transvaginal OPU from super-stimulated females using 3000 IU eCG and an interval of 18-20 h after GnRH administration. The transfer of two hatching cloned blastocytes per surrogate increases the pregnancy rate and decreases EPL in dromedary camels.
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Affiliation(s)
- Nabil Mansour
- Fujairah Research Centre (FRC), Al-Hilal Tower, 3003, P.O. Box 666, Fujairah, United Arab Emirates; Department of Theriogenology, Faculty of Veterinary Medicine, Kafrelsheikh University, Egypt.
| | - Fouad Lamghari
- Fujairah Research Centre (FRC), Al-Hilal Tower, 3003, P.O. Box 666, Fujairah, United Arab Emirates
| | - Mostafa Nasef
- Bulaida Farms, Al-Mayya Group, P.O. Box 666, Fujairah, United Arab Emirates
| | | | | | - Yeon Ik Jeong
- UAE Biotech Research Center, Abu Dhabi, 30310, United Arab Emirates
| | - Mina Kang
- UAE Biotech Research Center, Abu Dhabi, 30310, United Arab Emirates
| | - Huijeong Kim
- UAE Biotech Research Center, Abu Dhabi, 30310, United Arab Emirates
| | - Yura Bae
- UAE Biotech Research Center, Abu Dhabi, 30310, United Arab Emirates
| | - Bo Hyun Eum
- UAE Biotech Research Center, Abu Dhabi, 30310, United Arab Emirates
| | - Yeon Woo Jeong
- UAE Biotech Research Center, Abu Dhabi, 30310, United Arab Emirates; Department of Companion Animal and Animal Resources Science, Joongbu University, Geumsan-gun, 32713, Republic of Korea
| | - Woo Suk Hwang
- UAE Biotech Research Center, Abu Dhabi, 30310, United Arab Emirates; Department of Biology, North-Eastern Federal University, Yakutsk, 67707, Sakha Republic, Russia.
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Sharko F, Slobodova N, Boulygina E, Cheprasov M, Gladysheva-Azgari M, Tsygankova S, Rastorguev S, Novgorodov G, Boeskorov G, Grigorieva L, Hwang WS, Tikhonov A, Nedoluzhko A. Ancient DNA of the Don-Hares Assumes the Existence of Two Distinct Mitochondrial Clades in Northeast Asia. Genes (Basel) 2023; 14:genes14030700. [PMID: 36980972 PMCID: PMC10047931 DOI: 10.3390/genes14030700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 03/09/2023] [Accepted: 03/11/2023] [Indexed: 03/14/2023] Open
Abstract
Paleoclimatic changes during the Pleistocene–Holocene transition is suggested as a main factor that led to species extinction, including the woolly mammoth (Mammuthus primigenius), Steller’s sea cow (Hydrodamalis gigas) and the Don-hare (Lepus tanaiticus). These species inhabited the territory of Eurasia during the Holocene, but eventually went extinct. The Don-hare is an extinct species of the genus Lepus (Leporidae, Lagomorpha), which lived in the Late Pleistocene–Early Holocene in Eastern Europe and Northern Asia. For a long time, the Don-hare was considered a separate species, but at the same time, its species status was disputed, taking into account both morphological data and mitochondrial DNA. In this study, mitochondrial genomes of five Don-hares, whose remains were found on the territory of Northeastern Eurasia were reconstructed. Firstly, we confirm the phylogenetic proximity of the “young” specimens of Don-hare and mountain or white hare, and secondly, that samples older than 39 Kya form a completely distinct mitochondrial clade.
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Affiliation(s)
- Fedor Sharko
- Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia
- Kurchatov Center for Genomic Research, National Research Centre “Kurchatov Institute”, 123182 Moscow, Russia
| | - Natalia Slobodova
- Kurchatov Center for Genomic Research, National Research Centre “Kurchatov Institute”, 123182 Moscow, Russia
- Faculty of Biology and Biotechnology, HSE University, 101000 Moscow, Russia
| | - Eugenia Boulygina
- Kurchatov Center for Genomic Research, National Research Centre “Kurchatov Institute”, 123182 Moscow, Russia
| | - Maksim Cheprasov
- Lazarev Mammoth Museum, M.K. Ammosov North-Eastern Federal University, 677000 Yakutsk, Russia
- Federal Research Centre “The Yakut Scientific Centre of the Siberian Branch of the Russian Academy of Sciences”, 677980 Yakutsk, Russia
| | - Maria Gladysheva-Azgari
- Kurchatov Center for Genomic Research, National Research Centre “Kurchatov Institute”, 123182 Moscow, Russia
| | - Svetlana Tsygankova
- Kurchatov Center for Genomic Research, National Research Centre “Kurchatov Institute”, 123182 Moscow, Russia
| | - Sergey Rastorguev
- Laboratory of Experimental Embryology, Institute of Translational Medicine, Pirogov Russian National Research Medical University, 117997 Moscow, Russia
| | - Gavril Novgorodov
- Lazarev Mammoth Museum, M.K. Ammosov North-Eastern Federal University, 677000 Yakutsk, Russia
| | - Gennady Boeskorov
- Institute of Diamond and Precious Metals Geology, Siberian Branch of the Russian Academy of Sciences, 677007 Yakutsk, Russia
| | - Lena Grigorieva
- Center of Molecular Paleontology, M.K. Ammosov North-Eastern Federal University, 677000 Yakutsk, Russia
| | - Woo Suk Hwang
- UAE Biotech Research Center, Abu Dhabi 30310, United Arab Emirates
- Department of Biology, North-Eastern Federal University, 677000 Yakutsk, Russia
| | - Alexei Tikhonov
- Lazarev Mammoth Museum, M.K. Ammosov North-Eastern Federal University, 677000 Yakutsk, Russia
- Zoological Institute of the Russian Academy of Sciences, 190121 Saint Petersburg, Russia
| | - Artem Nedoluzhko
- Paleogenomics Laboratory, European University at Saint Petersburg, 191187 Saint Petersburg, Russia
- Correspondence:
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Olsson PO, Jeong YW, Jeong Y, Kang M, Park GB, Choi E, Kim S, Hossein MS, Son YB, Hwang WS. Insights from one thousand cloned dogs. Sci Rep 2022; 12:11209. [PMID: 35778582 PMCID: PMC9249891 DOI: 10.1038/s41598-022-15097-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Accepted: 05/10/2022] [Indexed: 11/26/2022] Open
Abstract
Animal cloning has been popularized for more than two decades, since the birth of Dolly the Sheep 25 years ago in 1996. There has been an apparent waning of interest in cloning, evident by a reduced number of reports. Over 1500 dogs, representing approximately 20% of the American Kennel Club’s recognized breeds, have now been cloned, making the dog (Canis familiaris) one of the most successfully cloned mammals. Dogs have a unique relationship with humans, dating to prehistory, and a high degree of genome homology to humans. A number of phenotypic variations, rarely recorded in natural reproduction have been observed in in these more than 1000 clones. These observations differ between donors and their clones, and between clones from the same donor, indicating a non-genetic effect. These differences cannot be fully explained by current understandings but point to epigenetic and cellular reprograming effects of somatic cell nuclear transfer. Notably, some phenotypic variations have been reversed through further cloning. Here we summarize these observations and elaborate on the cloning procedure.
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Affiliation(s)
- P Olof Olsson
- UAE Biotech Research Center, Lane 2128 Al Wathba, Al Wathba South, Abu Dhabi, UAE
| | - Yeon Woo Jeong
- Department of Companion Animal and Animal Resources Science, Joongbu University, Geumsan-gun, 32713, Republic of Korea
| | - Yeonik Jeong
- UAE Biotech Research Center, Lane 2128 Al Wathba, Al Wathba South, Abu Dhabi, UAE
| | - Mina Kang
- UAE Biotech Research Center, Lane 2128 Al Wathba, Al Wathba South, Abu Dhabi, UAE
| | - Gang Bae Park
- UAE Biotech Research Center, Lane 2128 Al Wathba, Al Wathba South, Abu Dhabi, UAE
| | - Eunji Choi
- UAE Biotech Research Center, Lane 2128 Al Wathba, Al Wathba South, Abu Dhabi, UAE
| | - Sun Kim
- UAE Biotech Research Center, Lane 2128 Al Wathba, Al Wathba South, Abu Dhabi, UAE
| | | | - Young-Bum Son
- UAE Biotech Research Center, Lane 2128 Al Wathba, Al Wathba South, Abu Dhabi, UAE
| | - Woo Suk Hwang
- UAE Biotech Research Center, Lane 2128 Al Wathba, Al Wathba South, Abu Dhabi, UAE. .,North Eastern Federal University, Republic of Sakha, Yakutia, Russia.
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Son YB, Hossein MS, Yu X, Jeong YI, Olsson PO, Hwang WS. Case Report: Spontaneous Fetal Demises at Third Trimester of Pregnancy Due to a Double Lopped Nuchal Cord in Camelus dromedarius. Front Vet Sci 2022; 9:872383. [PMID: 35685340 PMCID: PMC9171031 DOI: 10.3389/fvets.2022.872383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Accepted: 04/19/2022] [Indexed: 11/25/2022] Open
Abstract
The umbilical cord acts as the critical lifeline of the developing fetus by providing nutrients and oxygen to it. Umbilical cord abnormalities are considered the leading cause of stillbirth in humans, but information on stillbirths associated with umbilical cord abnormalities is very scant in the clinical practice of animals. Here, we described a case of fetal demise in camels indicated to be caused by fetal death from strangulation by its umbilical cord, which is commonly known as the nuchal cord. A pregnant camel at its 36 weeks of gestation spontaneously aborted a single fetus. The camel was 5 years old and nullipara. A 6-day-old cloned embryo was transferred transcervically to the recipient. Pregnancy was confirmed 50 days after embryo transfer by ultrasonography, and the pregnant camel was maintained under a standard nutritional plan. The neck of the aborted fetus was strangulated tightly by a double loop of the umbilical cord. There was no congenital anomaly or other malformation in the fetus. We concluded that the nuchal cord was tightly coiled around the neck of the fetus and interfered with the blood flow in the fetus by collapsing the umbilical vein and subsequently causing fetal death and abortion. To the authors' knowledge, this is the first reported case of a nuchal cord in camels.
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Affiliation(s)
- Young-Bum Son
- UAE Biotech Research Center, Abu Dhabi, United Arab Emirates
| | | | - Xianfeng Yu
- Jilin Provincial Key Laboratory of Animal Model College of Animal Science, Jilin University, Changchun, China
| | - Yeon Ik Jeong
- UAE Biotech Research Center, Abu Dhabi, United Arab Emirates
| | - P. Olof Olsson
- UAE Biotech Research Center, Abu Dhabi, United Arab Emirates
| | - Woo Suk Hwang
- UAE Biotech Research Center, Abu Dhabi, United Arab Emirates
- Department of Biology, North-Eastern Federal University, Yakutsk, Russia
- *Correspondence: Woo Suk Hwang
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Son YB, Jeong YI, Jeong YW, Hossein MS, Hwang WS. Impact of co-transfer of embryos produced by somatic cell nuclear transfer using two types of donor cells on pregnancy outcomes in dogs. Anim Biosci 2022; 35:1360-1366. [PMID: 35507850 PMCID: PMC9449398 DOI: 10.5713/ab.22.0043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Accepted: 04/06/2022] [Indexed: 12/03/2022] Open
Abstract
Objective The present study analyzed the influence of co-transferring embryos with high and low cloning efficiencies produced via somatic cell nuclear transfer (SCNT) on pregnancy outcomes in dogs. Methods Cloned dogs were produced by SCNT using donor cells derived from a Tibetan Mastiff (TM) and Toy Poodle (TP). The in vivo developmental capacity of cloned embryos was evaluated. The pregnancy and parturition rates were determined following single transfer of 284 fused oocytes into 21 surrogates and co-transfer of 47 fused oocytes into four surrogates. Results When cloned embryos produced using a single type of donor cell were transferred into surrogates, the pregnancy and live birth rates were significantly higher following transfer of embryos produced using TP donor cells than following transfer of embryos produced using TM donor cells. Next, pregnancy and live birth rates were compared following single and co-transfer of these cloned embryos. The pregnancy and live birth rates were similar upon co-transfer of embryos and single transfer of embryos produced using TP donor cells but were significantly lower upon single transfer of embryos produced using TM donor cells. Furthermore, the parturition rate for TM dogs and the percentage of these dogs that remained alive until weaning was significantly higher upon co-transfer than upon single transfer of embryos. However, there was no difference between the two embryo transfer methods for TP dogs. The mean birth weight of cloned TM dogs was significantly higher upon single transfer than upon co-transfer of embryos. However, the body weight of TM dogs did not significantly differ between the two embryo transfer methods after day 5. Conclusion For cloned embryos with a lower developmental competence, the parturition rate and percentage of dogs that remain alive until weaning are increased when they are co-transferred with cloned embryos with a greater developmental competence.
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Son YB, Jeong YI, Hossein MS, Yu X, Olsson PO, Kang M, Kim H, Bae Y, Tinson A, Singh KK, Rajesh S, Noura AS, Hwang WS. Influence of PMSG on Superstimulation and Embryo Development Following Somatic Cell Nuclear Transfer in Holstein Cows in the United Arab Emirates. Front Vet Sci 2022; 9:895325. [PMID: 35558897 PMCID: PMC9087592 DOI: 10.3389/fvets.2022.895325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2022] [Accepted: 04/04/2022] [Indexed: 11/29/2022] Open
Abstract
The present study investigated the effect of superstimulation to improve in vitro embryo production in the Gulf area, where the temperature is high. Holstein cows were classified into the control and superstimulation groups. Superstimulation was induced with a single intramuscular injection of pregnant mare serum gonadotropin (PMSG; 2500 IU) on day 14 of the estrus cycle (day 0; estrus). The development of follicles was evaluated by ultrasonography of the ovaries daily. At 40 h after the PMSG injection, oocytes were collected by the ovum pick-up (OPU) technique. OPU was performed at the same stage of the estrus cycle in the control group as in the superstimulation group. The number of follicles with a diameter of more than 6 mm and the number of retrieved cumulus-oocyte complexes were significantly higher in the superstimulation group than in the control group. Furthermore, the maturation rate was higher in the superstimulation group than in the control group. Cloned embryos were produced by somatic cell nuclear transfer using matured oocytes. The cleavage and blastocyst formation rates were significantly higher in the superstimulation group than in the control group. In conclusion, a single injection of PMSG can facilitate the efficient production of cloned cow embryos.
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Affiliation(s)
- Young-Bum Son
- UAE Biotech Research Center, Abu Dhabi, United Arab Emirates
- Abu Dhabi Biotech Research Foundation, Seoul, South Korea
| | - Yeon Ik Jeong
- UAE Biotech Research Center, Abu Dhabi, United Arab Emirates
- Abu Dhabi Biotech Research Foundation, Seoul, South Korea
| | | | - Xianfeng Yu
- UAE Biotech Research Center, Abu Dhabi, United Arab Emirates
- Jilin Provincial Key Laboratory of Animal Model, Jilin University, Changchun, China
| | - Per Olof Olsson
- UAE Biotech Research Center, Abu Dhabi, United Arab Emirates
| | - Mina Kang
- UAE Biotech Research Center, Abu Dhabi, United Arab Emirates
| | - Huijeong Kim
- UAE Biotech Research Center, Abu Dhabi, United Arab Emirates
| | - Yura Bae
- UAE Biotech Research Center, Abu Dhabi, United Arab Emirates
| | - Alex Tinson
- Hilli E.T. Cloning and Surgical Centre Presidential Camels and Camel Racing Affairs, Abu Dhabi, United Arab Emirates
| | - Kuhad Kuldip Singh
- Hilli E.T. Cloning and Surgical Centre Presidential Camels and Camel Racing Affairs, Abu Dhabi, United Arab Emirates
| | - Singh Rajesh
- Hilli E.T. Cloning and Surgical Centre Presidential Camels and Camel Racing Affairs, Abu Dhabi, United Arab Emirates
| | - Al Shamsi Noura
- Hilli E.T. Cloning and Surgical Centre Presidential Camels and Camel Racing Affairs, Abu Dhabi, United Arab Emirates
| | - Woo Suk Hwang
- UAE Biotech Research Center, Abu Dhabi, United Arab Emirates
- Abu Dhabi Biotech Research Foundation, Seoul, South Korea
- Department of Biology, North-Eastern Federal University, Yakutsk, Russia
- *Correspondence: Woo Suk Hwang
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Son YB, Jeong YI, Jeong YW, Yu X, Olsson PO, Cai L, Choi EJ, Hossein MS, Tinson A, Singh KK, Rajesh S, Noura AS, Hwang WS. Comparison of pregnancy outcomes following the transfer of early-developmental stage embryos and blastocysts produced by somatic cell nuclear transfer in Camelus dromedarius. Anim Reprod Sci 2021; 233:106842. [PMID: 34530180 DOI: 10.1016/j.anireprosci.2021.106842] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 04/14/2021] [Revised: 09/01/2021] [Accepted: 09/02/2021] [Indexed: 11/24/2022]
Abstract
The embryonic stage, site of embryo transfer in the reproductive tract of the surrogate, and embryo transfer method are important for the successful production of offspring. In the present study, there was comparison of pregnancy rates in camels following the surgical transfer of early-developmental stage embryos at Day 2 and transvaginal transfer of blastocysts at Day 7. Embryos were produced by somatic cell nuclear transfer using in vivo-matured oocytes and ear fibroblasts as donor cells. A total of 305 oocytes were collected from 27 donors, among which 275 oocytes were in metaphase II. In Group A, 110 oocytes were reconstructed, 78 fused oocytes were cultured for 2 days, and 37 early-developmental stage embryos were transferred into 13 surrogates. In Group B, 165 oocytes were utilized, 117 fused oocytes were cultured for 7 days, and 24 blastocysts were trans-vaginally transferred into 12 surrogates. Pregnancy was determined when there was an increase in serum progesterone concentrations and was confirmed using real-time ultrasonography. Microsatellite analysis was performed to confirm the parentage of offspring. Two live births occurred in Groups A and B (live birth rate of 15.4% and 16.7%, respectively). Results indicate both early-developmental stage embryos and blastocysts produced by somatic cell nuclear transfer using in vivo-matured oocytes can lead to live births in camel with similar efficiency. It, therefore, is recommended that trans-vaginal blastocyst transfer be utilized for camels considering the pregnancy and live birth rates, ease of the transfer procedure and comfort and safety of surrogates.
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Affiliation(s)
- Young-Bum Son
- UAE Biotech Research Center, P.O. Box 30310, Al Wathba South, Al Wathba, Abu Dhabi, United Arab Emirates
| | - Yeon Ik Jeong
- UAE Biotech Research Center, P.O. Box 30310, Al Wathba South, Al Wathba, Abu Dhabi, United Arab Emirates
| | - Yeon Woo Jeong
- UAE Biotech Research Center, P.O. Box 30310, Al Wathba South, Al Wathba, Abu Dhabi, United Arab Emirates
| | - Xianfeng Yu
- UAE Biotech Research Center, P.O. Box 30310, Al Wathba South, Al Wathba, Abu Dhabi, United Arab Emirates; Jilin Provincial Key Laboratory of Animal Model College of Animal Science, Jilin University, Changchun, China
| | - P Olof Olsson
- UAE Biotech Research Center, P.O. Box 30310, Al Wathba South, Al Wathba, Abu Dhabi, United Arab Emirates
| | - Lian Cai
- UAE Biotech Research Center, P.O. Box 30310, Al Wathba South, Al Wathba, Abu Dhabi, United Arab Emirates
| | - Eun Ji Choi
- UAE Biotech Research Center, P.O. Box 30310, Al Wathba South, Al Wathba, Abu Dhabi, United Arab Emirates
| | - Mohammad Shamim Hossein
- UAE Biotech Research Center, P.O. Box 30310, Al Wathba South, Al Wathba, Abu Dhabi, United Arab Emirates
| | - Alex Tinson
- Hilli E.T. Cloning and Surgical Centre, Presidential Camels and Camel Racing Affairs, 17292 Al-Cn, United Arab Emirates
| | - Kuhad Kuldip Singh
- Hilli E.T. Cloning and Surgical Centre, Presidential Camels and Camel Racing Affairs, 17292 Al-Cn, United Arab Emirates
| | - Singh Rajesh
- Hilli E.T. Cloning and Surgical Centre, Presidential Camels and Camel Racing Affairs, 17292 Al-Cn, United Arab Emirates
| | - Al Shamsi Noura
- Hilli E.T. Cloning and Surgical Centre, Presidential Camels and Camel Racing Affairs, 17292 Al-Cn, United Arab Emirates
| | - Woo Suk Hwang
- UAE Biotech Research Center, P.O. Box 30310, Al Wathba South, Al Wathba, Abu Dhabi, United Arab Emirates.
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Son YB, Jeong YI, Hossein MS, Olsson PO, Kim G, Jeong YW, Hwang WS. Comparative evaluation of three different formulas for predicting the parturition date of German Shepherds following somatic cell nuclear transfer. J Vet Med Sci 2021; 83:1448-1453. [PMID: 34373372 PMCID: PMC8498844 DOI: 10.1292/jvms.21-0154] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Several studies have reported methods to estimate the parturition date of dogs using ultrasonographic measurements. However, these prediction models were mainly determined using
ultrasonographic measurements of naturally pregnant small- and medium-sized dogs, and no such studies have been performed using dogs carrying cloned fetuses produced via somatic cell nuclear
transfer. The present study evaluated the abilities of three reference formulas (Luvoni and Grioni, Milani et al., and Groppetti et al.), all of which were
developed using data from naturally occurring pregnancies, to accurately predict the parturition date in surrogates carrying cloned German Shepherd (GS) fetuses. All three formulas were
based on the use of inner chorionic cavity diameter (ICC) measurements, obtained via ultrasonography. For evaluation, a total of 54 ICC measurements were collected from 14 pregnant bitches
carrying cloned GS fetuses. We found that the clinical accuracy of the breed-specific Groppetti et al. formula was highest among those of the three formulas tested, with 87%
and 100% of the estimated parturition dates (calculated based on the ICC measurements) being within 1 and 2 days, respectively, of the actual delivery date. By contrast, the Luvoni and
Grioni formula showed relatively low accuracy, and the Milani et al. formula showed higher accuracy than that reported previously for natural pregnancies.
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Affiliation(s)
| | | | | | | | - Gyeongmin Kim
- Department of Biological Sciences of Companion Animals and Plants, Kyungsung University
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Son YB, Jeong YI, Jeong YW, Hossein MS, Olsson PO, Tinson A, Singh KK, Lee SY, Hwang WS. Cell Source-Dependent In Vitro Chondrogenic Differentiation Potential of Mesenchymal Stem Cell Established from Bone Marrow and Synovial Fluid of Camelus dromedarius. Animals (Basel) 2021; 11:ani11071918. [PMID: 34203207 PMCID: PMC8300404 DOI: 10.3390/ani11071918] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2021] [Revised: 06/17/2021] [Accepted: 06/21/2021] [Indexed: 01/15/2023] Open
Abstract
Simple Summary This is the first study to demonstrate the establishment and subsequent analysis of attributes, including the chondrogenic capacity of mesenchymal stem cells (MSCs) from bone marrow (BM) and synovial fluid (SF) from the same donor Camelus dromedarius. MSCs of SF origin were notably more efficient in their chondrogenic capacity and represent a potential source for camel regenerative medicine addressing chondrocyte-related problems. Abstract Mesenchymal stem cells (MSCs) are promising multipotent cells with applications for cartilage tissue regeneration in stem cell-based therapies. In cartilage regeneration, both bone marrow (BM-MSCs) and synovial fluid (SF-MSCs) are valuable sources. However, the cellular characteristics and chondrocyte differentiation potential were not reported in either of the camel stem cells. The in vitro chondrocyte differentiation competence of MSCs, from (BM and SF) sources of the same Camelus dromedaries (camel) donor, was determined. Both MSCs were evaluated on pluripotent markers and proliferation capacity. After passage three, both MSCs showed fibroblast-like morphology. The proliferation capacity was significantly increased in SF-MSCs compared to BM-MSCs. Furthermore, SF-MSCs showed an enhanced expression of transcription factors than BM-MSCs. SF-MSCs exhibited lower differentiation potential toward adipocytes than BM-MSCs. However, the osteoblast differentiation potential was similar in MSCs from both sources. Chondrogenic pellets obtained from SF-MSCs revealed higher levels of chondrocyte-specific markers than those from BM-MSCs. Additionally, glycosaminoglycan (GAG) content was elevated in SF-MSCs related to BM-MSCs. This is, to our knowledge, the first study to establish BM-MSCs and SF-MSCs from the same donor and to demonstrate in vitro differentiation potential into chondrocytes in camels.
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Affiliation(s)
- Young-Bum Son
- UAE Biotech Research Center, Abu Dhabi 30310, United Arab Emirates; (Y.-B.S.); (Y.I.J.); (Y.W.J.); (M.S.H.); (P.O.O.)
| | - Yeon Ik Jeong
- UAE Biotech Research Center, Abu Dhabi 30310, United Arab Emirates; (Y.-B.S.); (Y.I.J.); (Y.W.J.); (M.S.H.); (P.O.O.)
| | - Yeon Woo Jeong
- UAE Biotech Research Center, Abu Dhabi 30310, United Arab Emirates; (Y.-B.S.); (Y.I.J.); (Y.W.J.); (M.S.H.); (P.O.O.)
| | - Mohammad Shamim Hossein
- UAE Biotech Research Center, Abu Dhabi 30310, United Arab Emirates; (Y.-B.S.); (Y.I.J.); (Y.W.J.); (M.S.H.); (P.O.O.)
| | - Per Olof Olsson
- UAE Biotech Research Center, Abu Dhabi 30310, United Arab Emirates; (Y.-B.S.); (Y.I.J.); (Y.W.J.); (M.S.H.); (P.O.O.)
| | - Alex Tinson
- Hilli E.T. Cloning and Surgical Centre Presidential Camels and Camel Racing Affairs, Al-Ain 17292, United Arab Emirates; (A.T.); (K.K.S.)
| | - Kuhad Kuldip Singh
- Hilli E.T. Cloning and Surgical Centre Presidential Camels and Camel Racing Affairs, Al-Ain 17292, United Arab Emirates; (A.T.); (K.K.S.)
| | - Sang-Yun Lee
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine and Research Institute of Life Science, Gyeongsang National University, Jinju 52828, Korea;
| | - Woo Suk Hwang
- UAE Biotech Research Center, Abu Dhabi 30310, United Arab Emirates; (Y.-B.S.); (Y.I.J.); (Y.W.J.); (M.S.H.); (P.O.O.)
- Correspondence:
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12
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Son YB, Jeong YI, Jeong YW, Olsson PO, Hossein MS, Cai L, Kim S, Choi EJ, Sakaguchi K, Tinson A, Singh KK, Rajesh S, Noura AS, Hwang WS. Development and pregnancy rates of Camelus dromedarius-cloned embryos derived from in vivo- and in vitro-matured oocytes. Anim Biosci 2021; 35:177-183. [PMID: 34289583 PMCID: PMC8738946 DOI: 10.5713/ab.21.0131] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Accepted: 05/28/2021] [Indexed: 11/27/2022] Open
Abstract
Objective The present study evaluated the efficiency of embryo development and pregnancy of somatic cell nuclear transfer (SCNT) embryos using different source-matured oocytes in Camelus dromedarius. Methods Camelus dromedarius embryos were produced by SCNT using in vivo- and in vitro- matured oocytes. In vitro embryo developmental capacity of reconstructed embryos was evaluated. To confirm the efficiency of pregnancy and live birth rates, a total of 72 blastocysts using in vitro- matured oocytes transferred into 45 surrogates and 95 blastocysts using in vivo- matured oocytes were transferred into 62 surrogates by transvaginal method. Results The collected oocytes derived from ovum pick up showed higher maturation potential into metaphase II oocytes than oocytes from the slaughterhouse. The competence of cleavage, and blastocyst were also significantly higher in in vivo- matured oocytes than in vitro- matured oocytes. After embryo transfer, 11 pregnant and 10 live births were confirmed in in vivo- matured oocytes group, and 2 pregnant and 1 live birth were confirmed in in vitro- matured oocytes group. Furthermore, blastocysts produced by in vivo-matured oocytes resulted in significantly higher early pregnancy and live birth rates than in vitro-matured oocytes. Conclusion In this study, SCNT embryos using in vivo- and in vitro-matured camel oocytes were successfully developed, and pregnancy was established in recipient camels. We also confirmed that in vivo-matured oocytes improved the development of embryos and the pregnancy capacity using the blastocyst embryo transfer method.
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Affiliation(s)
- Young-Bum Son
- UAE Biotech Research Center, 30310 Al Wathba, Abu Dhabi, United Arab Emirates
| | - Yeon Ik Jeong
- UAE Biotech Research Center, 30310 Al Wathba, Abu Dhabi, United Arab Emirates
| | - Yeon Woo Jeong
- UAE Biotech Research Center, 30310 Al Wathba, Abu Dhabi, United Arab Emirates
| | - Per Olof Olsson
- UAE Biotech Research Center, 30310 Al Wathba, Abu Dhabi, United Arab Emirates
| | | | - Lian Cai
- UAE Biotech Research Center, 30310 Al Wathba, Abu Dhabi, United Arab Emirates
| | - Sun Kim
- UAE Biotech Research Center, 30310 Al Wathba, Abu Dhabi, United Arab Emirates
| | - Eun Ji Choi
- UAE Biotech Research Center, 30310 Al Wathba, Abu Dhabi, United Arab Emirates
| | - Kenichiro Sakaguchi
- UAE Biotech Research Center, 30310 Al Wathba, Abu Dhabi, United Arab Emirates
| | - Alex Tinson
- Hilli E.T. Cloning and Surgical Centre Presidential Camels and Camel Racing Affairs, 17292 Al-Ain, United Arab Emirates
| | - Kuhad Kuldip Singh
- Hilli E.T. Cloning and Surgical Centre Presidential Camels and Camel Racing Affairs, 17292 Al-Ain, United Arab Emirates
| | - Singh Rajesh
- Hilli E.T. Cloning and Surgical Centre Presidential Camels and Camel Racing Affairs, 17292 Al-Ain, United Arab Emirates
| | - Al Shamsi Noura
- Hilli E.T. Cloning and Surgical Centre Presidential Camels and Camel Racing Affairs, 17292 Al-Ain, United Arab Emirates
| | - Woo Suk Hwang
- UAE Biotech Research Center, 30310 Al Wathba, Abu Dhabi, United Arab Emirates
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Son YB, Jeong YI, Jeong YW, Yu X, Cai L, Choi EJ, Hossein MS, Tinson A, Singh KK, Rajesh S, Noura AS, Hwang WS. Vitrification of camel skin tissue for use as a resource for somatic cell nuclear transfer in Camelus dromedarius. In Vitro Cell Dev Biol Anim 2021; 57:487-492. [PMID: 34014457 PMCID: PMC8205866 DOI: 10.1007/s11626-021-00590-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 05/02/2021] [Indexed: 10/27/2022]
Affiliation(s)
- Young-Bum Son
- UAE Biotech Research Center, 30310 Al Wathba, Abu Dhabi, United Arab Emirates
| | - Yeon Ik Jeong
- UAE Biotech Research Center, 30310 Al Wathba, Abu Dhabi, United Arab Emirates
| | - Yeon Woo Jeong
- UAE Biotech Research Center, 30310 Al Wathba, Abu Dhabi, United Arab Emirates
| | - Xianfeng Yu
- Jilin Provincial Key Laboratory of Animal Model, College of Animal Science, Jilin University, Changchun, China
| | - Lian Cai
- UAE Biotech Research Center, 30310 Al Wathba, Abu Dhabi, United Arab Emirates
| | - Eun Ji Choi
- UAE Biotech Research Center, 30310 Al Wathba, Abu Dhabi, United Arab Emirates
| | | | - Alex Tinson
- Hilli E.T. Cloning and Surgical Centre Presidential Camels and Camel Racing Affairs, 17292, Al-Ain, United Arab Emirates
| | - Kuhad Kuldip Singh
- Hilli E.T. Cloning and Surgical Centre Presidential Camels and Camel Racing Affairs, 17292, Al-Ain, United Arab Emirates
| | - Singh Rajesh
- Hilli E.T. Cloning and Surgical Centre Presidential Camels and Camel Racing Affairs, 17292, Al-Ain, United Arab Emirates
| | - Al Shamsi Noura
- Hilli E.T. Cloning and Surgical Centre Presidential Camels and Camel Racing Affairs, 17292, Al-Ain, United Arab Emirates
| | - Woo Suk Hwang
- UAE Biotech Research Center, 30310 Al Wathba, Abu Dhabi, United Arab Emirates.
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14
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Hwang KC, Choi YK, Jeong YI, Park KB, Choi EJ, Jeong YW, Hossein MS, Hyun SH, Jeung EB, Hwang WS. Demetylation of the sex-determining region Y gene promoter and incidence of disorder of sex development in cloned dog males. J Physiol Pharmacol 2020; 71. [PMID: 32991314 DOI: 10.26402/jpp.2020.3.05] [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] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Accepted: 06/10/2020] [Indexed: 11/03/2022]
Abstract
Canine cloning is occasionally accompanied by abnormal sexual development. Some male donor cells produce cloned pups with female external genitalia and complete male gonadal dysgenesis, which is classified as an XY disorder of sex development (XY DSD). In this study, we examine the potential of 5-aza-2'-deoxycytidine (5-aza-dC), a DNA methyltransferase inhibitor, to reduce the phenotypic abnormality XY DSD in somatic cell nuclear transfer (SCNT)- derived pups. We used a 9-year-old normal male German Shepherd dog as a cell donor. Donor cells were treated with 10 nM 5-aza-dC for 4 days before being used for SCNT. At the same stage of cell development, significantly lower levels of DNA methylation of the sex-determining region Y (SRY) promoter was observed in the treated donor cells compared to that in the untreated cells (95.2% versus 53.3% on day 4 for the control and treated groups, respectively). No significant differences were observed in the control or treatment groups concerning fusion rate, pregnancy rate (30 days or entire period), the number of pups, or the incidence of XY DSD. However, more XY DSD dogs were observed in the control group (31.25%) than in the treatment group (14.29%). Hypermethylation of the SRY promoter was observed in the XY DSD cloned pups in both the treatment (84.8%) and control groups (91.1 ± 1.4%) compared to the methylation level in the phenotypically normal male pups of the treatment (23.2 ± 20.9%) and control groups (39.1 ± 20.1%). These results suggest that 5-aza-dC treatment of donor cells can reduce the methylation level of the SRY promoter in donor cells, and thus, 5-aza-dC is advantageous for reducing the incidence of XY DSD in canine cloning.
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Affiliation(s)
- K C Hwang
- Abu Dhabi Biotech Research Foundation, Kyungin-ro, Guro-gu, Seoul, Republic of Korea
| | - Y K Choi
- Abu Dhabi Biotech Research Foundation, Kyungin-ro, Guro-gu, Seoul, Republic of Korea
| | - Y I Jeong
- Abu Dhabi Biotech Research Foundation, Kyungin-ro, Guro-gu, Seoul, Republic of Korea
| | - K B Park
- Abu Dhabi Biotech Research Foundation, Kyungin-ro, Guro-gu, Seoul, Republic of Korea
| | - E J Choi
- Abu Dhabi Biotech Research Foundation, Kyungin-ro, Guro-gu, Seoul, Republic of Korea
| | - Y W Jeong
- Abu Dhabi Biotech Research Foundation, Kyungin-ro, Guro-gu, Seoul, Republic of Korea
| | - M S Hossein
- Abu Dhabi Biotech Research Foundation, Kyungin-ro, Guro-gu, Seoul, Republic of Korea
| | - S H Hyun
- Abu Dhabi Biotech Research Foundation, Kyungin-ro, Guro-gu, Seoul, Republic of Korea.,Laboratory of Veterinary Embryology and Biotechnology, College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, Republic of Korea
| | - E-B Jeung
- Laboratory of Veterinary Biochemistry and Molecular Biology, College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, Republic of Korea
| | - W S Hwang
- Abu Dhabi Biotech Research Foundation, Kyungin-ro, Guro-gu, Seoul, Republic of Korea.
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15
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Eun K, Hong N, Jeong YW, Park MG, Hwang SU, Jeong YIK, Choi EJ, Olsson PO, Hwang WS, Hyun SH, Kim H. Transcriptional activities of human elongation factor-1α and cytomegalovirus promoter in transgenic dogs generated by somatic cell nuclear transfer. PLoS One 2020; 15:e0233784. [PMID: 32492024 PMCID: PMC7269240 DOI: 10.1371/journal.pone.0233784] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Accepted: 05/12/2020] [Indexed: 11/30/2022] Open
Abstract
Recent advances in somatic cell nuclear transfer (SCNT) in canines facilitate the production of canine transgenic models. Owing to the importance of stable and strong promoter activity in transgenic animals, we tested human elongation factor 1α (hEF1α) and cytomegalovirus (CMV) promoter sequences in SCNT transgenic dogs. After transfection, transgenic donor fibroblasts with the hEF1α-enhanced green fluorescence protein (EGFP) transgene were successfully isolated using fluorescence-activated cell sorting (FACS). We obtained four puppies, after SCNT, and identified three puppies as being transgenic using PCR analysis. Unexpectedly, EGFP regulated by hEF1α promoter was not observed at the organismal and cellular levels in these transgenic dogs. EGFP expression was rescued by the inhibition of DNA methyltransferases, implying that the hEF1α promoter is silenced by DNA methylation. Next, donor cells with CMV-EGFP transgene were successfully established and SCNT was performed. Three puppies of six born puppies were confirmed to be transgenic. Unlike hEF1α-regulated EGFP, CMV-regulated EGFP was strongly detectable at both the organismal and cellular levels in all transgenic dogs, even after 19 months. In conclusion, our study suggests that the CMV promoter is more suitable, than the hEF1α promoter, for stable transgene expression in SCNT-derived transgenic canine model.
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Affiliation(s)
- Kiyoung Eun
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seongbuk-gu, Seoul, Republic of Korea
- Institute of Animal Molecular Biotechnology, Korea University, Seongbuk-gu, Seoul, Republic of Korea
| | - Nayoung Hong
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seongbuk-gu, Seoul, Republic of Korea
- Institute of Animal Molecular Biotechnology, Korea University, Seongbuk-gu, Seoul, Republic of Korea
| | - Yeon Woo Jeong
- Sooam Biotech Research Foundation, Guro-gu, Seoul, Republic of Korea
| | - Min Gi Park
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seongbuk-gu, Seoul, Republic of Korea
- Institute of Animal Molecular Biotechnology, Korea University, Seongbuk-gu, Seoul, Republic of Korea
| | - Seon-Ung Hwang
- Laboratory of Veterinary Embryology and Biotechnology, College of Veterinary Medicine, Chungbuk National University, Seowon-gu, Cheongju, Republic of Korea
- Institute of Stem Cell & Regenerative Medicine, Chungbuk National University, Seowon-gu, Cheongju, Republic of Korea
| | - Yeon I. K. Jeong
- Sooam Biotech Research Foundation, Guro-gu, Seoul, Republic of Korea
| | - Eun Ji Choi
- Sooam Biotech Research Foundation, Guro-gu, Seoul, Republic of Korea
| | - P. Olof Olsson
- Sooam Biotech Research Foundation, Guro-gu, Seoul, Republic of Korea
| | - Woo Suk Hwang
- Sooam Biotech Research Foundation, Guro-gu, Seoul, Republic of Korea
| | - Sang-Hwan Hyun
- Laboratory of Veterinary Embryology and Biotechnology, College of Veterinary Medicine, Chungbuk National University, Seowon-gu, Cheongju, Republic of Korea
- Institute of Stem Cell & Regenerative Medicine, Chungbuk National University, Seowon-gu, Cheongju, Republic of Korea
- * E-mail: (SHH); (HK)
| | - Hyunggee Kim
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seongbuk-gu, Seoul, Republic of Korea
- Institute of Animal Molecular Biotechnology, Korea University, Seongbuk-gu, Seoul, Republic of Korea
- * E-mail: (SHH); (HK)
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Jeong Y, Olson OP, Lian C, Lee ES, Jeong YW, Hwang WS. Dog cloning from post-mortem tissue frozen without cryoprotectant. Cryobiology 2020; 97:226-230. [PMID: 32268132 DOI: 10.1016/j.cryobiol.2020.03.013] [Citation(s) in RCA: 3] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 03/05/2020] [Accepted: 03/29/2020] [Indexed: 11/28/2022]
Abstract
Successful reproductive cloning depends on obtaining intact donor nuclei from viable cells, ideally isolated by tissue biopsy of a living donor. However, owners and veterinarians often freeze deceased animals, which eventually causes damage to cellular micro-organelles due to the formation of intracellular water crystals. In the present study, we have reported the production of viable cloned puppies using donor nuclei of cells obtained from frozen carcasses. Five cases of deceased and frozen canine specimens were presented to be cloned. Skin fibroblast cell lines were successfully established for four specimens. Significant longer time was needed for the cell growth from frozen tissues (4 days) to reach 80% confluency compared to fresh tissue and frozen tissues frozen for 1- or 2-days. Similarly, SA-βgal positive cells (death cells) were significantly higher in frozen cells for 2- or 4- days compared to samples from fresh or frozen (1 day) sources. The cloning efficiency (CE) and the pregnancy rates (PR) of frozen cells were lower than those obtained from fresh or living donors (CE 2.4 ± 1.8% vs. 0.6 ± 0.3%, PR 21.7 ± 16.1% vs. 7.7 ± 5.3% for fresh vs. frozen, respectively). Here we demonstrate is the possibility to produce healthy offspring from cell lines obtained from frozen tissue collected post-mortem.
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Affiliation(s)
- Yeonik Jeong
- Sooam Biotech Research Foundation, 64 Kyunginro, Guro-gu, Seoul, 08359, Republic of Korea; Laboratory of Theriogenology, College of Veterinary Medicine, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Olof P Olson
- Sooam Biotech Research Foundation, 64 Kyunginro, Guro-gu, Seoul, 08359, Republic of Korea
| | - Cai Lian
- Sooam Biotech Research Foundation, 64 Kyunginro, Guro-gu, Seoul, 08359, Republic of Korea
| | - Eun Song Lee
- Laboratory of Theriogenology, College of Veterinary Medicine, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Yeon Woo Jeong
- Sooam Biotech Research Foundation, 64 Kyunginro, Guro-gu, Seoul, 08359, Republic of Korea.
| | - Woo Suk Hwang
- Sooam Biotech Research Foundation, 64 Kyunginro, Guro-gu, Seoul, 08359, Republic of Korea
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17
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Park KM, Wang JW, Yoo YM, Choi MJ, Hwang KC, Jeung EB, Jeong YW, Hwang WS. Sphingosine-1-phosphate (S1P) analog phytosphingosine-1-phosphate (P1P) improves the in vitro maturation efficiency of porcine oocytes via regulation of oxidative stress and apoptosis. Mol Reprod Dev 2019; 86:1705-1719. [PMID: 31490595 DOI: 10.1002/mrd.23264] [Citation(s) in RCA: 9] [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: 04/08/2019] [Accepted: 08/03/2019] [Indexed: 12/11/2022]
Abstract
Phytosphingosine-1-phosphate (P1P) is a signaling sphingolipid that regulates various physiological activities. However, little is known about the effect of P1P in the context of reproduction. Thus, we aimed to investigate the influence of P1P on oocyte maturation during porcine in vitro maturation (IVM). Here, we report the expression of S1PR1-3 among P1P receptors (S1PR1-4) in cumulus cells and oocytes. When P1P was administered at concentrations of 10, 50, 100, and 1,000 nM during IVM, the metaphase II rate was significantly increased in the 1,000 nM (1 μM) P1P treatment group. Maturation rate improvement by P1P supplementation was observed only in the presence of epidermal growth factor (EGF). Oocytes under the influence of P1P showed decreased intracellular reactive oxygen species levels but no significant differences in glutathione levels. In our molecular studies, P1P treatment upregulated gene expression involved in cumulus expansion (Has2 and EGF), antioxidant enzymes (SOD3 and Cat), and developmental competence (Oct4) while activating extracellular signal-regulated kinase1/2 and Akt signaling. P1P treatment also influenced oocyte survival by shifting the ratio of Bcl-2 to Bax while inactivating JNK signaling. We further demonstrated that oocytes matured with P1P displayed significantly higher developmental competence (cleavage and blastocyst [BL] formation rate) and greater BL quality (total cell number and the ratio of apoptotic cells) when activated via parthenogenetic activation (PA) and in vitro fertilization. Despite the low levels of endogenous P1P found in animals, exogenous P1P influenced animal reproduction, as shown by increased porcine oocyte maturation as well as preimplantation embryo development. This study and its findings are potentially relevant for both human and animal-assisted reproduction.
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Affiliation(s)
- Kyu-Mi Park
- Sooam Biotech Research Foundation, Guro-gu, Seoul, Republic of Korea
| | - Jae Woong Wang
- Sooam Biotech Research Foundation, Guro-gu, Seoul, Republic of Korea
| | - Yeong-Min Yoo
- Laboratory of Biochemistry and Molecular Biology, College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, Republic of Korea
| | | | - Kyu Chan Hwang
- Sooam Biotech Research Foundation, Guro-gu, Seoul, Republic of Korea
| | - Eui-Bae Jeung
- Laboratory of Biochemistry and Molecular Biology, College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, Republic of Korea
| | - Yeon Woo Jeong
- Sooam Biotech Research Foundation, Guro-gu, Seoul, Republic of Korea
| | - Woo Suk Hwang
- Sooam Biotech Research Foundation, Guro-gu, Seoul, Republic of Korea
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Kim JJ, Park KB, Choi EJ, Hyun SH, Kim NH, Jeong YW, Hwang WS. Corrigendum to "Relationship between time post-ovulation and progesterone on oocyte maturation and pregnancy in canine cloning" [Anim. Reprod. Sci. 185 (2017) 75-82]. Anim Reprod Sci 2017; 187:203. [PMID: 29126832 DOI: 10.1016/j.anireprosci.2017.10.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Joung Joo Kim
- Sooam Biotech Research Foundation, 64 Kyungin-ro, Guro-gu, Seoul, Republic of Korea
| | - Kang Bae Park
- Sooam Biotech Research Foundation, 64 Kyungin-ro, Guro-gu, Seoul, Republic of Korea
| | - Eun Ji Choi
- Sooam Biotech Research Foundation, 64 Kyungin-ro, Guro-gu, Seoul, Republic of Korea
| | - Sang Hwan Hyun
- Sooam Biotech Research Foundation, 64 Kyungin-ro, Guro-gu, Seoul, Republic of Korea; Laboratory of Veterinary Embryology and Biotechnology, College of Veterinary Medicine, Chungbuk National University, Cheongju, Republic of Korea
| | - Nam-Hyung Kim
- Department of Animal Sciences, Chungbuk National University, Cheongju, Republic of Korea
| | - Yeon Woo Jeong
- Sooam Biotech Research Foundation, 64 Kyungin-ro, Guro-gu, Seoul, Republic of Korea.
| | - Woo Suk Hwang
- Sooam Biotech Research Foundation, 64 Kyungin-ro, Guro-gu, Seoul, Republic of Korea
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Eun K, Hwang SU, Jeong YW, Seo S, Lee SY, Hwang WS, Hyun SH, Kim H. SV40 Large T Antigen Disrupts Embryogenesis of Canine and Porcine Somatic Cell Nuclear Transfer Embryo. Biol Proced Online 2017; 19:13. [PMID: 29075153 PMCID: PMC5648454 DOI: 10.1186/s12575-017-0061-6] [Citation(s) in RCA: 5] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Accepted: 09/01/2017] [Indexed: 01/17/2023] Open
Abstract
Background Somatic cell nuclear transfer (SCNT) is a useful biotechnological tool for transgenic animal production using genetically modified somatic cells (GMSCs). However, there are several limitations preventing successful transgenic animal generation by SCNT, such as obtaining proper somatic donor cells with a sufficiently long life span and proliferative capacity for generating GMSCs. Here, we established simian virus 40 large T antigen (SV40LT)-mediated lifespan-extended canine fibroblast cells (SV40LT-K9 cells) and evaluated their potential as nuclei donors for SCNT, based on cellular integrity and SCNT embryo development. Results SV40LT did not cause canine cell transformation, based on cell morphology and proliferation rate. No anchorage-independent growth in vitro and tumorigenicity in vivo were observed. After SCNT with SV40LT-K9 cells, embryos were transferred into surrogate dogs. All dogs failed to become pregnant. Most embryos did not proceed past the 8-cell stage and only one surrogate showed an implantation trace in its oviduct, indicating that the cells rarely developed into blastocysts. Because of the absence of an in vitro maturation method for canine embryos, we performed identical experiments using porcine fibroblast cells. Similarly, SV40LT did not transform porcine fibroblast cells (SV40LT-Pig cells). During in vitro development of SV40LT-Pig cell-driven SCNT embryos, their blastocyst formation rate was clearly lower than those of normal cells. Karyotyping analysis revealed that both SV40LT-K9 and SV40LT-Pig cells had aberrant chromosomal statuses. Conclusions Although lifespan-extended canine and porcine cells via SV40LT exhibit no apparent transforming changes, they are inappropriate for use as nuclei donors for SCNT because of their aneuploidy.
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Affiliation(s)
- Kiyoung Eun
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841 Republic of Korea
| | - Seon-Ung Hwang
- Laboratory of Veterinary Embryology and Biotechnology, College of Veterinary Medicine, Institute of Stem Cell & Regenerative Medicine, Chungbuk National University, 52 Naesudong-ro, Seowon-gu, Cheongju, 28644 Republic of Korea
| | - Yeon Woo Jeong
- Sooam Biotech Research Foundation, San 43-41 Oryu-dong, Guro-gu, Seoul, Republic of Korea
| | - Sunyoung Seo
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841 Republic of Korea
| | - Seon Yong Lee
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841 Republic of Korea
| | - Woo Suk Hwang
- Sooam Biotech Research Foundation, San 43-41 Oryu-dong, Guro-gu, Seoul, Republic of Korea
| | - Sang-Hwan Hyun
- Laboratory of Veterinary Embryology and Biotechnology, College of Veterinary Medicine, Institute of Stem Cell & Regenerative Medicine, Chungbuk National University, 52 Naesudong-ro, Seowon-gu, Cheongju, 28644 Republic of Korea
| | - Hyunggee Kim
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841 Republic of Korea.,Department of Medical Engineering, College of Medicine, Korea University, Seoul, Republic of Korea
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20
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Kim JJ, Park KB, Choi EJ, Hyun SH, Kim NH, Jeong YW, Hwang WS. Relationship between time post-ovulation and progesterone on oocyte maturation and pregnancy in canine cloning. Anim Reprod Sci 2017; 185:75-82. [PMID: 28843841 DOI: 10.1016/j.anireprosci.2017.08.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [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: 02/03/2017] [Revised: 08/07/2017] [Accepted: 08/09/2017] [Indexed: 11/24/2022]
Abstract
Canine oocytes ovulated at prophase complete meiosis and continue to develop in presence of a high progesterone concentration in the oviduct. Considering that meiotic competence of canine oocyte is accomplished in the oviductal environment, we postulate that hormonal milieu resulting from the circulating progesterone concentration may affect oocyte maturation and early development of embryos. From 237 oocyte donors, 2620 oocytes were collected and their meiotic status and morphology were determined. To determine optimal characteristics of the mature oocytes subjected to nuclear transfer, a proportion of the meiotic status of the oocytes were classified in reference to time post-ovulation as well as progesterone (P4) level. A high proportion of matured oocytes were collected from >126h (55.5%) post-ovulation or 40-50ngmL-1 (46.4%) group compared to the other groups. Of the oocyte donors that provided mature oocytes in vivo, there was no correlation between serum progesterone of donors and time post ovulation, however, time post-ovulation were significantly shorter for <30ng/mL group (P<0.05). Using mature oocytes, 1161 cloned embryos were reconstructed and transferred into 77 surrogates. In order to determine the relationship between pregnancy performance and serum progesterone level, embryos were transferred into surrogates showing various P4 serum levels. The highest pregnancy (31.8%) and live birth cloning efficacy (2.2%) rates were observed when the embryos were transferred into surrogates with circulating P4 levels were from 40 to 50ngmL-1. In conclusion, measurement of circulating progesterone of female dog could be a suitable an indicator of the optimal time to collect quality oocyte and to select surrogates for cloning.
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Affiliation(s)
- Joung Joo Kim
- Sooam Biotech Research Foundation, 64 Kyungin-ro, Guro-gu, Seoul, Republic of Korea
| | - Kang Bae Park
- Sooam Biotech Research Foundation, 64 Kyungin-ro, Guro-gu, Seoul, Republic of Korea
| | - Eun Ji Choi
- Sooam Biotech Research Foundation, 64 Kyungin-ro, Guro-gu, Seoul, Republic of Korea
| | - Sang Hwan Hyun
- Sooam Biotech Research Foundation, 64 Kyungin-ro, Guro-gu, Seoul, Republic of Korea; Laboratory of Veterinary Embryology and Biotechnology, College of Veterinary Medicine, Chungbuk National University, Cheongju, Republic of Korea
| | - Nam-Hyung Kim
- Department of Animal Sciences, Chungbuk National University, Cheongju, Republic of Korea
| | - Yeon Woo Jeong
- Sooam Biotech Research Foundation, 64 Kyungin-ro, Guro-gu, Seoul, Republic of Korea.
| | - Woo Suk Hwang
- Sooam Biotech Research Foundation, 64 Kyungin-ro, Guro-gu, Seoul, Republic of Korea
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21
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Adabavazeh Z, Hwang WS, Su YH. Effect of Adding Cerium on Microstructure and Morphology of Ce-Based Inclusions Formed in Low-Carbon Steel. Sci Rep 2017; 7:46503. [PMID: 28485376 PMCID: PMC5423036 DOI: 10.1038/srep46503] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Accepted: 03/15/2017] [Indexed: 11/12/2022] Open
Abstract
Intra-granular Acicular Ferrite (IAF), as one of the most well-known desirable microstructure of ferrite with a chaotic crystallographic orientation, can not only refine the microstructure and retard the propagation of cleavage crack but also provide excellent combination of strength and toughness in steel. The effect of adding cerium on microstructure and controlling proper cerium-based inclusions in order to improve properties in low-carbon commercial steel (SS400) were investigated. The type of inclusions can be controlled by changing S/O ratio and Ce content. Without Ce modification, MnS is a dominate inclusion. After adding Ce, the stable inclusion phases change from AlCeO3 to Ce2O2S. The optimum amount of cerium, 0.0235 wt.%, lead in proper grain refinement and formation of cerium oxide, oxy-sulfide and sulfide inclusions. Having a high amount of cerium results in increasing the number of inclusions significantly as a result it cannot be effective enough and the inclusions will act like barriers for others. It is found that the inclusions with a size of about 4∼7 μm can serve as heterogeneous nucleation sites for AF formation. Thermodynamic calculations have been applied to predict the inclusion formation in this molten steel as well, which show a good agreement with experimental one.
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Affiliation(s)
- Z Adabavazeh
- Department of Materials Science and Engineering, National Cheng Kung University, No. 1 Tainan, 701, Taiwan
| | - W S Hwang
- Department of Materials Science and Engineering, National Cheng Kung University, No. 1 Tainan, 701, Taiwan
| | - Y H Su
- Iron and Steel Research and Development Department, China Steel Corporation, Kaohsiung 812, Taiwan
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22
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Jeong YH, Lu H, Park CH, Li M, Luo H, Kim JJ, Liu S, Ko KH, Huang S, Hwang IS, Kang MN, Gong D, Park KB, Choi EJ, Park JH, Jeong YW, Moon C, Hyun SH, Kim NH, Jeung EB, Yang H, Hwang WS, Gao F. Stochastic anomaly of methylome but persistent SRY hypermethylation in disorder of sex development in canine somatic cell nuclear transfer. Sci Rep 2016; 6:31088. [PMID: 27501986 PMCID: PMC4977463 DOI: 10.1038/srep31088] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2016] [Accepted: 07/13/2016] [Indexed: 12/30/2022] Open
Abstract
Somatic cell nuclear transfer (SCNT) provides an excellent model for studying epigenomic reprogramming during mammalian development. We mapped the whole genome and whole methylome for potential anomalies of mutations or epimutations in SCNT-generated dogs with XY chromosomal sex but complete gonadal dysgenesis, which is classified as 78, XY disorder of sex development (DSD). Whole genome sequencing revealed no potential genomic variations that could explain the pathogenesis of DSD. However, extensive but stochastic anomalies of genome-wide DNA methylation were discovered in these SCNT DSD dogs. Persistent abnormal hypermethylation of the SRY gene was observed together with its down-regulated mRNA and protein expression. Failure of SRY expression due to hypermethylation was further correlated with silencing of a serial of testis determining genes, including SOX9, SF1, SOX8, AMH and DMRT1 in an early embryonic development stage at E34 in the XY(DSD) gonad, and high activation of the female specific genes, including FOXL2, RSPO1, CYP19A1, WNT4, ERα and ERβ, after one postnatal year in the ovotestis. Our results demonstrate that incomplete demethylation on the SRY gene is the driving cause of XY(DSD) in these XY DSD dogs, indicating a central role of epigenetic regulation in sex determination.
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Affiliation(s)
| | - Hanlin Lu
- BGI-Shenzhen, Shenzhen, China.,Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, China
| | - Chi-Hun Park
- Sooam Biotech Research Foundation, Seoul 152-904, Korea.,Animal Bioscience and Biotechnology Laboratory, United States Department of Agriculture, Beltsville, MD, 20705, USA.,Department of Animal and Avian Sciences, University of Maryland, College Park, MD, 20742, USA
| | | | | | - Joung Joo Kim
- Sooam Biotech Research Foundation, Seoul 152-904, Korea
| | | | - Kyeong Hee Ko
- Sooam Biotech Research Foundation, Seoul 152-904, Korea
| | | | - In Sung Hwang
- Sooam Biotech Research Foundation, Seoul 152-904, Korea
| | - Mi Na Kang
- Sooam Biotech Research Foundation, Seoul 152-904, Korea
| | - Desheng Gong
- BGI-Shenzhen, Shenzhen, China.,Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, China
| | - Kang Bae Park
- Sooam Biotech Research Foundation, Seoul 152-904, Korea
| | - Eun Ji Choi
- Sooam Biotech Research Foundation, Seoul 152-904, Korea
| | | | | | - Changjong Moon
- College of Veterinary Medicine, Chonnam National University, Gwangju 500-757, Korea
| | - Sang-Hwan Hyun
- Sooam Biotech Research Foundation, Seoul 152-904, Korea.,College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk 361-763, Korea
| | - Nam Hyung Kim
- College of Animal Sciences, Chungbuk National University, Cheongju, Chungbuk 361-763, Korea
| | - Eui-Bae Jeung
- College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk 361-763, Korea
| | | | - Woo Suk Hwang
- Sooam Biotech Research Foundation, Seoul 152-904, Korea
| | - Fei Gao
- BGI-Shenzhen, Shenzhen, China.,Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, China
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23
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Jeon Y, Yoon JD, Cai L, Hwang SU, Kim E, Lee E, Jeung EB, Hyun SH, Hwang WS. Zinc supplementation during in vitro maturation increases the production efficiency of cloned pigs. J Reprod Dev 2016; 62:635-638. [PMID: 27488694 PMCID: PMC5177983 DOI: 10.1262/jrd.2016-072] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Zinc supplementation (0.8 µg/ml) in in vitro maturation (IVM) medium significantly enhances oocyte quality. In this study, we compared the
development of somatic cell nuclear transfer (SCNT) embryos produced from conventional IVM (control) and zinc-supplemented IVM oocytes. A total of 1206 and 890
SCNT embryos were produced using control and zinc-supplemented oocytes, respectively, and then were transferred to 11 and 8 recipients, respectively. Five
control recipients and three zinc-supplemented recipients became pregnant. Two live piglets and eight mummies were born from two control recipients, and ten
live piglets and six stillborn piglets were born from three zinc-supplemented recipients. The production efficiency significantly increased in the
zinc-supplemented group (0.33% vs. 3.02%). This report suggests that zinc supplementation in IVM medium improved the production efficiency of
cloned pigs.
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Affiliation(s)
- Yubyeol Jeon
- Laboratory of Veterinary Embryology and Biotechnology (VETEMBIO), Veterinary Medical Center and College of Veterinary Medicine, Chungbuk National University, Cheongju 28644, Chungbuk, Republic of Korea
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24
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Jeong YW, Kim JJ, Kim HD, Hwang KC, Hyun SH, Kim NH, Jeung EB, Hwang WS. Preimplantation development of cloned canine embryos recovered by hysterectomy or surgical uterine flushing and subsequent pregnancy outcomes. Theriogenology 2015; 86:1865-1872.e1. [PMID: 27587271 DOI: 10.1016/j.theriogenology.2015.10.026] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Revised: 10/13/2015] [Accepted: 10/17/2015] [Indexed: 11/18/2022]
Abstract
Dog cloning offers a substantial potential because of the advancements in assisted reproductive technology and development of the human disease model in line with the transgenic technique. However, little is known about the development of the canine cloned embryo during the preimplantation period. The aim of this study was to investigate the most efficient method and time for collecting cloned canine preimplantation embryos and to ascertain the developmental timeline of cloned canine embryos. Two hundred cloned embryos were created and transferred into 11 surrogates. The preimplantation stage cloned embryos were then collected on Days 7, 8, and 9 using an ovariohysterectomy or the Foley balloon catheter method. The recovery rate of reconstructed embryos was 63.6% and 60.6% for the ovariohysterectomy and Foley balloon catheter methods, respectively. Although significant differences were observed in the early developmental stages (one-cell and 16-cell stages), no significant difference was observed in the blastocyst stage. Significantly higher blastocyst rate was observed when the embryos were collected on Day 8 (11.4%) than on Day 7 (0.0%; P < 0.05). At the proximal uterine horn on Day 7, no embryos at any stage were found, whereas on Days 8 and 9, blastocysts were found. We have observed a 63% initial pregnancy rate at 25 to 30 days after embryo transfer and a 50% full-term pregnancy rate, whereas 6.3% of the puppies were born, and 5.5% were born live among the total transferred embryos. Our results suggest that cloned embryos can develop to blastocysts by Day 8, and full-term pregnancy can be achieved after embryo transfer in canine.
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Affiliation(s)
- Yeon Woo Jeong
- Sooam Biotech Research Foundation, Seoul, Republic of Korea
| | - Joung Joo Kim
- Sooam Biotech Research Foundation, Seoul, Republic of Korea
| | - Hyun Duk Kim
- Sooam Biotech Research Foundation, Seoul, Republic of Korea
| | - Kyu Chan Hwang
- Sooam Biotech Research Foundation, Seoul, Republic of Korea
| | - Sang Hwan Hyun
- Sooam Biotech Research Foundation, Seoul, Republic of Korea; Laboratory of Veterinary Embryology and Biotechnology, College of Veterinary Medicine, Chungbuk National University, Cheongju, Republic of Korea
| | - Nam-Hyung Kim
- Department of Animal Sciences, Chungbuk National University, Cheongju, Republic of Korea
| | - Eui-Bae Jeung
- Laboratory of Veterinary Biochemistry and Molecular Biology, Chungbuk National University, Cheongju, Republic of Korea
| | - Woo Suk Hwang
- Sooam Biotech Research Foundation, Seoul, Republic of Korea.
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25
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Davranoglou LR, Hwang WS, Weirauch C. Neotropical Physoderinae revisited, with description of a new, sexually dimorphic species of Leptophysoderes Weirauch (Hemiptera: Reduviidae). Zootaxa 2015; 3963:89-99. [PMID: 26249394 DOI: 10.11646/zootaxa.3963.1.6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Indexed: 11/04/2022]
Abstract
The small reduviid subfamily Physoderinae has the greatest species diversity in the Oriental region and Madagascar. Only the two monotypic genera Cryptophysoderes Wygodzinsky and Maldonado and Leptophysoderes Weirauch are currently known from the Neotropical region. We here describe and document a new, sexually dimorphic species of Physoderinae, Leptophysoderes sarapiqui sp. nov. from Costa Rica. The generic diagnosis of Leptophysoderes is modified to accommodate the new species. Females and immatures of Leptophysoderes are documented for the first time.
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Affiliation(s)
- L R Davranoglou
- Department of Life Sciences, Imperial College London, South Kensington Campus, London SW7 2AZ, U.K.;
| | - W S Hwang
- Lee Kong Chian Natural History Museum and Department of Biological Sciences, National University of Singapore, Singapore 117546.;
| | - C Weirauch
- Department of Entomology, University of California, Riverside, USA.;
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26
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Jeong YI, Park CH, Kim HS, Jeong YW, Lee JY, Park SW, Lee SY, Hyun SH, Kim YW, Shin T, Hwang WS. Effects of Trichostatin A on In vitro Development of Porcine Embryos Derived from Somatic Cell Nuclear Transfer. Asian-Australas J Anim Sci 2014; 26:1680-8. [PMID: 25049758 PMCID: PMC4092892 DOI: 10.5713/ajas.2013.13029] [Citation(s) in RCA: 7] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2013] [Revised: 08/20/2013] [Accepted: 04/13/2013] [Indexed: 12/03/2022]
Abstract
Many different approaches have been developed to improve the efficiency of animal cloning by somatic cell nuclear transfer (SCNT), one of which is to modify histone acetylation levels using histone deacetylase inhibitors (HDACi) such as trichostatin A (TSA). In the present study, we examined the effect of TSA on in vitro development of porcine embryos derived from SCNT. We found that TSA treatment (50 nM) for 24 h following oocyte activation improved blastocyst formation rates (to 22.0%) compared with 8.9% in the non-treatment group and total cell number of the blastocysts for determining embryo quality also increased significantly (88.9→114.4). Changes in histone acetylation levels as a result of TSA treatment were examined using indirect immunofluorescence and confocal microscopy scanning. Results showed that the histone acetylation level in TSA-treated embryos was higher than that in controls at both acetylated histone H3 lysine 9 (AcH3K9) and acetylated histone H4 lysine 12 (AcH4K12). Next, we compared the expression patterns of seven genes (OCT4, ID1; the pluripotent genes, H19, NNAT, PEG1; the imprinting genes, cytokeratin 8 and 18; the trophoblast marker genes). The SCNT blastocysts both with and without TSA treatment showed lower levels of OCT4, ID1, cytokeratin 8 and 18 than those of the in vivo blastocysts. In the case of the imprinting genes H19 and NNAT, except PEG1, the SCNT blastocysts both with and without TSA treatment showed higher levels than those of the in vivo blastocysts. Although the gene expression patterns between cloned blastocysts and their in vivo counterparts were different regardless of TSA treatment, it appears that several genes in NT blastocysts after TSA treatment showed a slight tendency toward expression patterns of in vivo blastocysts. Our results suggest that TSA treatment may improve preimplantation porcine embryo development following SCNT.
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Affiliation(s)
- Yeon Ik Jeong
- Sooam Biotech Research Foundation, 64 Kyunginro, Guro-gu, Seoul 152-895, Korea
| | - Chi Hun Park
- Sooam Biotech Research Foundation, 64 Kyunginro, Guro-gu, Seoul 152-895, Korea
| | - Huen Suk Kim
- Sooam Biotech Research Foundation, 64 Kyunginro, Guro-gu, Seoul 152-895, Korea
| | - Yeon Woo Jeong
- Sooam Biotech Research Foundation, 64 Kyunginro, Guro-gu, Seoul 152-895, Korea
| | - Jong Yun Lee
- Sooam Biotech Research Foundation, 64 Kyunginro, Guro-gu, Seoul 152-895, Korea
| | - Sun Woo Park
- Sooam Biotech Research Foundation, 64 Kyunginro, Guro-gu, Seoul 152-895, Korea
| | - Se Yeong Lee
- Sooam Biotech Research Foundation, 64 Kyunginro, Guro-gu, Seoul 152-895, Korea
| | - Sang Hwan Hyun
- Sooam Biotech Research Foundation, 64 Kyunginro, Guro-gu, Seoul 152-895, Korea ; Laboratory of Veterinary Embryology and Biotechnology, College of Veterinary Medicine, Chungbuk National University, Cheongju 361-763, Korea
| | - Yeun Wook Kim
- Sooam Biotech Research Foundation, 64 Kyunginro, Guro-gu, Seoul 152-895, Korea
| | - Taeyoung Shin
- Sooam Biotech Research Foundation, 64 Kyunginro, Guro-gu, Seoul 152-895, Korea
| | - Woo Suk Hwang
- Sooam Biotech Research Foundation, 64 Kyunginro, Guro-gu, Seoul 152-895, Korea
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27
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Hwang I, Jeong YW, Kim JJ, Lee HJ, Kang M, Park KB, Park JH, Kim YW, Kim WT, Shin T, Hyun SH, Jeung EB, Hwang WS. Successful cloning of coyotes through interspecies somatic cell nuclear transfer using domestic dog oocytes. Reprod Fertil Dev 2014; 25:1142-8. [PMID: 23217630 DOI: 10.1071/rd12256] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2012] [Accepted: 10/23/2012] [Indexed: 11/23/2022] Open
Abstract
Interspecies somatic cell nuclear transfer (iSCNT) is an emerging assisted reproductive technology (ART) for preserving Nature's diversity. The scarcity of oocytes from some species makes utilisation of readily available oocytes inevitable. In the present study, we describe the successful cloning of coyotes (Canis latrans) through iSCNT using oocytes from domestic dogs (Canis lupus familiaris or dingo). Transfer of 320 interspecies-reconstructed embryos into 22 domestic dog recipients resulted in six pregnancies, from which eight viable offspring were delivered. Fusion rate and cloning efficiency during iSCNT cloning of coyotes were not significantly different from those observed during intraspecies cloning of domestic dogs. Using neonatal fibroblasts as donor cells significantly improved the cloning efficiency compared with cloning using adult fibroblast donor cells (P<0.05). The use of domestic dog oocytes in the cloning of coyotes in the present study holds promise for cloning other endangered species in the Canidae family using similar techniques. However, there are still limitations of the iSCNT technology, as demonstrated by births of morphologically abnormal coyotes and the clones' inheritance of maternal domestic dog mitochondrial DNA.
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Affiliation(s)
- Insung Hwang
- Sooam Biotech Research Foundation, 64 Kyungin-ro, Guro-gu, Seoul 152-895, Republic of Korea
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28
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Lee GS, Jeong YW, Kim JJ, Park SW, Ko KH, Kang M, Kim YK, Jung EM, Moon C, Hyun SH, Hwang KC, Kim NH, Shin T, Jeung EB, Hwang WS. A canine model of Alzheimer's disease generated by overexpressing a mutated human amyloid precursor protein. Int J Mol Med 2014; 33:1003-12. [PMID: 24481173 DOI: 10.3892/ijmm.2014.1636] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Accepted: 01/22/2014] [Indexed: 11/06/2022] Open
Abstract
Canines are considered the most authentic model for studying multifactorial human diseases, as these animals typically share a common environment with man. Somatic cell nuclear transfer (SCNT) technology along with genetic engineering of nuclear donor cells provides a unique opportunity for examining human diseases using transgenic canines. In the present study, we generated transgenic canines that overexpressed the human amyloid precursor protein (APP) gene containing well-characterized familial Alzheimer's disease (AD) mutations. We successfully obtained five out of six live puppies by SCNT. This was confirmed by observing the expression of green fluorescence protein in the body as a visual transgenic marker and the overexpression of the mutated APP gene in the brain. The transgenic canines developed AD-like symptoms, such as enlarged ventricles, an atrophied hippocampus, and β-amyloid plaques in the brain. Thus, the transgenic canines we created can serve as a novel animal model for studying human AD.
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Affiliation(s)
- Geun-Shik Lee
- College of Veterinary Medicine and Institute of Veterinary Science, Kangwon National University, Chucheon, Gangwon 200‑701, Republic of Korea
| | - Yeon Woo Jeong
- SooAm Biotech Research Foundation, Seoul 152-904, Republic of Korea
| | - Joung Joo Kim
- SooAm Biotech Research Foundation, Seoul 152-904, Republic of Korea
| | - Sun Woo Park
- SooAm Biotech Research Foundation, Seoul 152-904, Republic of Korea
| | - Kyeong Hee Ko
- SooAm Biotech Research Foundation, Seoul 152-904, Republic of Korea
| | - Mina Kang
- SooAm Biotech Research Foundation, Seoul 152-904, Republic of Korea
| | - Yu Kyung Kim
- SooAm Biotech Research Foundation, Seoul 152-904, Republic of Korea
| | - Eui-Man Jung
- Laboratory of Veterinary Biochemistry and Molecular Biology, College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk 361-763, Republic of Korea
| | - Changjong Moon
- Department of Veterinary Anatomy, College of Veterinary Medical Institute, Chonnam National University, Gwangju, Gyeonggi 500-757, Republic of Korea
| | - Sang Hwan Hyun
- Laboratory of Veterinary Embryology and Biotechnology, College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk 361-763, Republic of Korea
| | - Kyu-Chan Hwang
- SooAm Biotech Research Foundation, Seoul 152-904, Republic of Korea
| | - Nam-Hyung Kim
- Department of Animal Science, Chungbuk National University, Cheongju, Chungbuk 361-763, Republic of Korea
| | - Taeyoung Shin
- SooAm Biotech Research Foundation, Seoul 152-904, Republic of Korea
| | - Eui-Bae Jeung
- Laboratory of Veterinary Biochemistry and Molecular Biology, College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk 361-763, Republic of Korea
| | - Woo Suk Hwang
- SooAm Biotech Research Foundation, Seoul 152-904, Republic of Korea
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Park CH, Jeong YH, Jeong YI, Lee SY, Jeong YW, Shin T, Kim NH, Jeung EB, Hyun SH, Lee CK, Lee E, Hwang WS. X-linked gene transcription patterns in female and male in vivo, in vitro and cloned porcine individual blastocysts. PLoS One 2012; 7:e51398. [PMID: 23236494 PMCID: PMC3517569 DOI: 10.1371/journal.pone.0051398] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2012] [Accepted: 10/31/2012] [Indexed: 11/18/2022] Open
Abstract
To determine the presence of sexual dimorphic transcription and how in vitro culture environments influence X-linked gene transcription patterns in preimplantation embryos, we analyzed mRNA expression levels in in vivo-derived, in vitro-fertilized (IVF), and cloned porcine blastocysts. Our results clearly show that sex-biased expression occurred between female and male in vivo blastocysts in X-linked genes. The expression levels of XIST, G6PD, HPRT1, PGK1, and BEX1 were significantly higher in female than in male blastocysts, but ZXDA displayed higher levels in male than in female blastocysts. Although we found aberrant expression patterns for several genes in IVF and cloned blastocysts, similar sex-biased expression patterns (on average) were observed between the sexes. The transcript levels of BEX1 and XIST were upregulated and PGK1 was downregulated in both IVF and cloned blastocysts compared with in vivo counterparts. Moreover, a remarkable degree of expression heterogeneity was observed among individual cloned embryos (the level of heterogeneity was similar in both sexes) but only a small proportion of female IVF embryos exhibited variability, indicating that this phenomenon may be primarily caused by faulty reprogramming by the somatic cell nuclear transfer (SCNT) process rather than in vitro conditions. Aberrant expression patterns in cloned embryos of both sexes were not ameliorated by treatment with Scriptaid as a potent HDACi, although the blastocyst rate increased remarkably after this treatment. Taken together, these results indicate that female and male porcine blastocysts produced in vivo and in vitro transcriptional sexual dimorphisms in the selected X-linked genes and compensation of X-linked gene dosage may not occur at the blastocyst stage. Moreover, altered X-linked gene expression frequently occurred in porcine IVF and cloned embryos, indicating that X-linked gene regulation is susceptible to in vitro culture and the SCNT process, which may eventually lead to problems with embryonic or placental defects.
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Affiliation(s)
- Chi-Hun Park
- Sooam Biotech Research Foundation, Seoul, Republic of Korea
| | | | - Yeun-Ik Jeong
- Sooam Biotech Research Foundation, Seoul, Republic of Korea
| | - Se-Yeong Lee
- Sooam Biotech Research Foundation, Seoul, Republic of Korea
| | - Yeon-Woo Jeong
- Sooam Biotech Research Foundation, Seoul, Republic of Korea
| | - Taeyoung Shin
- Sooam Biotech Research Foundation, Seoul, Republic of Korea
| | - Nam-Hyung Kim
- Department of Animal Sciences, Chungbuk National University, Cheongju, Republic of Korea
| | - Eui-Bae Jeung
- College of Veterinary Medicine, Chungbuk National University, Cheongju, Republic of Korea
| | - Sang-Hwan Hyun
- College of Veterinary Medicine, Chungbuk National University, Cheongju, Republic of Korea
| | - Chang-Kyu Lee
- Department of Agricultural Biotechnology, Animal Biotechnology Major, and Research Institute for Agriculture and Life Science, Seoul National University, Seoul, Republic of Korea
| | - Eunsong Lee
- College of Veterinary Medicine and Institute of Veterinary Science, Kangwon National University, Chunchon, Republic of Korea
| | - Woo Suk Hwang
- Sooam Biotech Research Foundation, Seoul, Republic of Korea
- * E-mail:
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Tang PH, Chang K, Hwang WS, Yeo SHG, Ong CL. Fetal hypothalamic hamartoma with suprasellar arachnoid cyst. Ultrasound Obstet Gynecol 2012; 40:725-726. [PMID: 22371236 DOI: 10.1002/uog.11145] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Affiliation(s)
- P H Tang
- Department of Diagnostic and Interventional Imaging, KK Women's and Children's Hospital, 100 Bukit Timah Road, Singapore.
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31
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Jeong YH, Park CH, Jang GH, Hwang IS, Jeong YI, Jeong EJ, Jeong YW, Hyun SH, Kim YW, Shin T, Jeung EB, Hwang WS. Reduced Hyperacute Rejection by Triple Transgenic Expression of Human Complement Regulatory Factors (hDAF and hCD59) and H-Transferase. Biol Reprod 2012. [DOI: 10.1093/biolreprod/87.s1.562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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32
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Hwang I, Jeong YW, Kim JJ, Lee HJ, Kang M, Park KB, Park JH, Kim YW, Kim WT, Shin T, Hyun SH, Hwang WS. Successful Cloning of Coyotes Through Interspecies Somatic Cell Nuclear Transfer (iSCNT) Using Domestic Dog Oocytes. Biol Reprod 2012. [DOI: 10.1093/biolreprod/87.s1.56] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Park CH, Jeong YH, Lee SG, Jeong YI, Jeung EB, Hyun SH, Shin T, Hwang WS. Sexual Dimorphic Expression of X-linked Genes in Individual Female and Male In Vivo and Cloned Porcine Blastocysts. Biol Reprod 2012. [DOI: 10.1093/biolreprod/87.s1.201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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34
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Uh KJ, Jeong SH, Yang CJ, Jeung EB, Hyun SH, Shin T, Hwang WS. Analysis of Molecular Expression Patterns of Bovine Embryonic Stem-Like Cells Derived by Conventional ES Cell Culture Condition. Biol Reprod 2012. [DOI: 10.1093/biolreprod/87.s1.588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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35
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Jeon HY, Jeong YW, Kim YW, Jeong YI, Hossein SM, Yang H, Hyun SH, Jeung EB, Hwang WS. Senescence is accelerated through donor cell specificity in cloned pigs. Int J Mol Med 2012; 30:383-91. [PMID: 22614175 DOI: 10.3892/ijmm.2012.1003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2012] [Accepted: 04/27/2012] [Indexed: 11/05/2022] Open
Abstract
Animals cloned by somatic cell nuclear transfer (SCNT) sometimes have abnormalities that result in large offspring syndrome or early death during gestation due to respiratory and metabolic defects. We cloned pigs using two sources of donor cells and observed phenotypic anomalies in three pigs cloned from one type of cell, s-pig fetal fibroblasts. These animals had many wrinkles on their faces and bodies and looked older than age-matched normal pigs. We performed the present study to examine whether the wrinkled phenotype in the cloned pigs was due to senescence, a genetic problem with donor specificity, or epigenetic problems with reprogramming. To address this issue, we investigated biomarkers of senescence, including telomere length and the expression of senescence-associated β-galactosidase (SA-β-gal), glyceraldehyde phosphate dehydrogenase (GAPDH) and β-actin. We also assessed the methylation status of euchromatic PRE-1 repetitive sequences and centromeric satellite DNA, and measured the mRNA levels of six imprinted genes, Copg2, Mest, Igf2R, GNAS, SNRPN and Ube3a. The telomeres of the wrinkled cloned pigs were much shorter than those of the normal cloned pigs and age-matched normal pigs. In the wrinkled cloned pigs, SA-β-gal activity was detected and GAPDH and β-actin were repressed. The mRNA levels of Mest, GNAS and Ube3a were reduced in the wrinkled cloned pigs, although there was no difference between the normal cloned pigs and normal controls. This gene expression analysis indicates that the wrinkled abnormality of our pigs originates from genetic abnormalities in the donor cells used for SCNT.
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Affiliation(s)
- Hyun Yong Jeon
- Sooam Biotech Research Foundation, Guro-gu, Seoul 152-904, Republic of Korea
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Kim HS, Lee JY, Jeong EJ, Yang CJ, Hyun SH, Shin T, Hwang WS. Effects of repetitive ionomycin treatment on in vitro development of bovine somatic cell nuclear transfer embryos. J Reprod Dev 2011; 58:132-9. [PMID: 22134064 DOI: 10.1262/jrd.11-040h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
To artificially activate embryos in somatic cell nuclear transfer (SCNT), chemical treatment with ionomycin has been used to induce transient levels of Ca(2+) and initiate reprogramming of embryos. Ca(2+) oscillation occurs naturally several times after fertilization (several times with 15- to 30-min intervals). This indicates how essential additional Ca(2+) influx is for successful reprogramming of embryos. Hence, in this report, the experimental design was aimed at improving the developmental efficiency of cloned embryos by repetitive Ca(2+) transients rather than the commonly used ionomycin treatment (4 min). To determine optimal Ca(2+) inflow conditions, we performed three different repetitive ionomycin (10 µM) treatments in reconstructed embryos: Group 1 (4-min ionomycin treatment, once), Group 2 (30-sec treatment, 4 times, 15-min intervals) and Group 3 (1-min treatment, 4 times, 15-min intervals). Pronuclear formation rates were checked to assess the effects of repetitive ionomycin treatment on reprogramming of cloned embryos. Cleavage rates were investigated on day 2, and the formation rates of blastocysts (BLs) were examined on day 7 to demonstrate the positive effect of repeated ionomycin treatment. In Group 3, a significant increase in BL formation was observed [47/200 (23.50%), 44/197 (22.33%) and 69/195 (35.38%) in Groups 1, 2 and 3, respectively]. Culturing embryos with different ionomycin treatments caused no significant difference among the groups in terms of the total cell number of BLs (164.3, 158.5 and 145.1, respectively). Additionally, expression of the anti-apoptotic Bcl-2 gene and MnSOD increased significantly in Group 3, whereas the expression of the pro-apoptotic Bax decreased statistically. In conclusion, the present study demonstrated that repeated ionomycin treatment is an improved activation method that can increase the developmental competence of SCNT embryos by decreasing the incidence of apoptosis.
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Affiliation(s)
- Huen Suk Kim
- Sooam Biotech Research Foundation, Seoul 137-851, Republic of Korea
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Lee RM, Ong CP, Jacobsen AS, Chan MY, Hwang WS. Malignant peripheral nerve sheath tumor mimicking carotid body tumor--case report and review. J Pediatr Surg 2011; 46:554-8. [PMID: 21376209 DOI: 10.1016/j.jpedsurg.2010.11.029] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2010] [Revised: 10/10/2010] [Accepted: 11/10/2010] [Indexed: 10/18/2022]
Abstract
Malignant peripheral nerve sheath tumor is a rare neurogenic tumor that usually presents in geriatic patients. Typically, it is found in the trunk and extremities and rarely presents in the head and neck region. It may mimic a carotid body tumor when it presents in the neck. We report the first case of malignant peripheral nerve sheath tumor of the vagus nerve in an adolescent boy. He presented with an asymptomatic lateral neck lump that was thought to be a benign schwannoma on preoperative imaging. We describe the diagnostic dilemma and management difficulties in this patient and review the literature.
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Affiliation(s)
- R M Lee
- Department of Paediatric Surgery, Kandang Kerbau Women and Children's Hospital, Singapore.
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Yong MH, Hwang WS, Knight LA, Fung W, Chan MY, Seow WT, Chui CH. Comparing histopathological classification with MYCN, 1p36 and 17q status detected by fluorescence in situ hybridisation from 14 untreated primary neuroblastomas in Singapore. Singapore Med J 2009; 50:1090-1094. [PMID: 19960166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
INTRODUCTION Neuroblastoma is the most common extracranial solid tumour in children, accounting for about 5.3 percent of all childhood cancers in Singapore. Several genetic abnormalities have been reported as prognostic markers, including amplification of the MYCN gene, deletion of the short arm of chromosome 1 (1p) and gain of the long arm of chromosome 17 (17q). However, the correlation between tumour histology and these genetic parameters remains to be established in our local population. METHODS 14 untreated primary neuroblastoma tumours, diagnosed consecutively in our hospital between 2003 and 2007, were included for this study. Tumour tissues were classified histologically as favourable or unfavourable, according to the modification of World Heath Organization Classification of Tumours, by associating the degree of differentiation and mitotic-karyorrhectic index of the neuroblastoma to the age of the patient. Fluorescence in situ hybridisation analysis for MYCN, 1p status and 17q status were subsequently performed on tumour touch imprints. RESULTS Five tumours with favourable histology were all negative for the three genetic parameters being investigated. The other nine tumours showing unfavourable histology exhibited one or more of the three genetic parameters. All MYCN amplified tumours either had additional 1p deletion and/or 17q gain. CONCLUSION Our limited data suggests that 1p deletion and 17q gain are reliable independent parameters correlating with an unfavourable histology and poor clinical outcome. The use of 1p deletion and 17q gain studies, in addition to MYCN amplification studies, should be considered routinely in predicting prognosis in neuroblastomas.
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Affiliation(s)
- M H Yong
- Department of Cytogenetics, KK Women's and Children's Hospital, Singapore
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Hossein MS, Jeong YW, Park SW, Kim JJ, Lee E, Ko KH, Hyuk P, Hoon SS, Kim YW, Hyun SH, Shin T, Hwang WS. Birth of Beagle dogs by somatic cell nuclear transfer. Anim Reprod Sci 2009; 114:404-14. [DOI: 10.1016/j.anireprosci.2008.10.010] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2008] [Revised: 09/24/2008] [Accepted: 10/03/2008] [Indexed: 01/28/2023]
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Kim S, Park SW, Hossein MS, Jeong YW, Kim JJ, Lee E, Kim YW, Hyun SH, Shin T, Hwang WS. Production of cloned dogs by decreasing the interval between fusion and activation during somatic cell nuclear transfer. Mol Reprod Dev 2009; 76:483-9. [PMID: 18951374 DOI: 10.1002/mrd.20953] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
To improve the efficiency of somatic cell nuclear transfer (SCNT) in dogs, we evaluated whether or not the interval between fusion and activation affects the success rate of SCNT. Oocytes retrieved from outbred dogs were reconstructed with adult somatic cells from a male or female Golden Retriever. In total, 151 and 225 reconstructed oocytes were transferred to 9 and 14 naturally synchronized surrogates for male and female donor cells, respectively. Chromosomal morphology was evaluated in 12 oocytes held for an interval of 2 hr between fusion and activation and 14 oocytes held for an interval of 4 hr. Three hundred seventy-six and 288 embryos were transferred to 23 and 16 surrogates for the 2 and 4 hr interval groups, respectively. Both the male (two pregnant surrogates gave birth to three puppies) and female (one pregnant surrogate gave birth to one puppy) donor cells gave birth to live puppies (P > 0.05). In the 2 hr group, significantly more reconstructed oocytes showed condensed, metaphase-like chromosomes compared to the 4 hr group (P < 0.05). A significantly higher pregnancy rate and a greater number of live born puppies were observed in the 2 hr group (13.0% and 1.1%, respectively) compared to the 4 hr group (0%) (P < 0.05). In total, three surrogate dogs carried pregnancies to term and four puppies were born. These results demonstrate that decreasing the interval between fusion and activation increases the success rate of clone production and pregnancy. These results may increase the overall efficiency of SCNT in the canine family.
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Affiliation(s)
- Sue Kim
- SooAm Biotech Research Foundation, Wonsam-myeon, Cheoin-gu, Yongin-si, Gyeonggi-do, South Korea
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Hossein MS, Jeong YW, Park SW, Kim JJ, Lee E, Ko KH, Kim HS, Kim YW, Hyun SH, Shin T, Hawthorne L, Hwang WS. Cloning missy: obtaining multiple offspring of a specific canine genotype by somatic cell nuclear transfer. Cloning Stem Cells 2009; 11:123-30. [PMID: 19226214 DOI: 10.1089/clo.2008.0029] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The present study was undertaken to evaluate two activation methods for somatic cell nuclear transfer (SCNT), namely, fusion and simultaneous activation (FSA, fusion medium contains calcium), versus fusion followed by chemical activation (F+CA, fusion medium does not contain calcium), and to evaluate the effects of parity of recipient dogs on the success of SCNT. Oocytes retrieved from outbred dogs were reconstructed with adult somatic cells collected from an 11-year-old female dog named Missy. In the FSA method, oocytes were fused and activated at the same time using two DC pulses of 1.75 kV/cm for 15 microsec. In the F+CA method, oocytes were fused with two DC pulses of 1.75 kV/cm for 15 microsec, and then activated 1 h after fusion by 10 microM calcium ionophore for 4 m and cultured for 4 h in 1.9 mM 6-dimethylaminopurine for postactivation. Activation method had a significant impact on the production efficiency of cloned dogs. There was a significant difference in full-term pregnancy rate and percentage of live puppies between the two methods (6.3% and 38.5% for FSA and F+CA, respectively). In our study, four out of five live offspring produced by F+CA survived versus FSA, which did not result in any surviving puppies. Overall, as few as 14 dogs and 54 reconstructed embryos were needed to produce a cloned puppy. In addition, the parity of recipient bitches had no effect on the success of SCNT in canine species. Both the nullipara and multipara bitches produced live puppies following SCNT-ET.
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Hossein MS, Jeong YW, Kim S, Kim JJ, Park SW, Jeong CS, Hyun SH, Hwang WS. Protocol for the Recovery of In Vivo Matured Canine Oocytes Based on Once Daily Measurement of Serum Progesterone. Cloning and Stem Cells 2008; 10:403-8. [DOI: 10.1089/clo.2008.0001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
| | - Yeon Woo Jeong
- Sooam Biotech Research Foundation, Seoul, Republic of Korea
| | - Sue Kim
- Sooam Biotech Research Foundation, Seoul, Republic of Korea
| | - Jeong Joo Kim
- Sooam Biotech Research Foundation, Seoul, Republic of Korea
| | - Sun Woo Park
- Sooam Biotech Research Foundation, Seoul, Republic of Korea
| | | | - Sang Hwan Hyun
- Sooam Biotech Research Foundation, Seoul, Republic of Korea
- Laboratory of Veterinary Biotechnology, College of Veterinary Medicine, Chungbuk National University, Chungbuk, Republic of Korea
| | - Woo Suk Hwang
- Sooam Biotech Research Foundation, Seoul, Republic of Korea
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Abstract
Inkjet printing of a liquid suspension prepared by dispersing silver powders of size around 4 nm in deionized (DI) water at 30 wt% was investigated in this study. By comparing with the results of pure DI water, the effects of nanoparticles on droplet formation between the nozzle and the substrate were also studied. A bipolar pulse waveform was employed in driving the piezoelectric printhead with pulse voltage set as the primary variable of this study. Observations showed that a higher driving pulse voltage was required for the silver suspension to form droplets than DI water. The liquid column broke up at the nozzle orifice for DI water while the silver suspension broke up further away below the nozzle office. It was also observed that the droplet size of the silver suspension was smaller than that of DI water. For the silver suspension the liquid column formed was thinner and longer and the pinch-off time of the liquid column to form droplets was also longer. However, the characteristic adjustment time for droplet recombination was shorter for the silver suspension than for DI water.
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Affiliation(s)
- M H Tsai
- Department of Materials Science and Engineering, National Cheng Kung University, Tainan, Taiwan
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Lee E, Kim JH, Park SM, Jeong YI, Lee JY, Park SW, Choi J, Kim HS, Jeong YW, Kim S, Hyun SH, Hwang WS. The analysis of chromatin remodeling and the staining for DNA methylation and histone acetylation do not provide definitive indicators of the developmental ability of inter-species cloned embryos. Anim Reprod Sci 2008; 105:438-50. [DOI: 10.1016/j.anireprosci.2007.12.021] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2007] [Revised: 11/27/2007] [Accepted: 12/12/2007] [Indexed: 10/22/2022]
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Lee GS, Kim HS, Hwang WS, Hyun SH. Characterization of porcine growth differentiation factor-9 and its expression in oocyte maturation. Mol Reprod Dev 2008; 75:707-14. [DOI: 10.1002/mrd.20810] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Hossein MS, Kim MK, Jang G, Oh HJ, Koo O, Kim JJ, Kang SK, Lee BC, Hwang WS. Effects of thiol compounds on in vitro maturation of canine oocytes collected from different reproductive stages. Mol Reprod Dev 2007; 74:1213-20. [PMID: 17595010 DOI: 10.1002/mrd.20674] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Various thiol compounds are known to improve cytoplasmic and/or nuclear maturation of oocytes in vitro. The present study examined the effects of two thiol compounds, cysteine (0.1, 0.5, and 1.0 mM) and cysteamine (50, 100, and 200 microM), on cytoplasmic and nuclear maturation of canine oocytes. Oocytes collected from different reproductive stages were cultured in TCM-199 supplemented with 10% fetal bovine serum, 2.2 mg/ml sodium carbonate, 2.0 microg/ml estrogen, 0.5 microg/ml FSH, 0.03 IU/ml hCG, and 1% penicillin-streptomycin solution for 72 h. Data were analyzed by two-way ANOVA after arcscine transformation and protected by Bonferroni post hoc test. The effects of cysteine and cysteamine on canine IVM were varied depending on the reproductive stage of oocyte donor bitches. In the follicular stage, significantly more oocytes reached the metaphase II (M II) stage when cultured with 0.5 or 1.0 mM cysteine (16.7% and 16.9%, respectively) compared to the control (6.2%). In the follicular stage, cysteamine increased oocyte maturation rate upto the M II stage (15.1% to 17.0%) compared to the control (4.4%). Both the 0.5 mM cysteine and 100 microM cysteamine, alone or together, increased the intracellular GSH level of canine oocytes compared to the control. Irrespective of reproductive stage, no further beneficial effects on nuclear or cytoplasmic maturation were observed when 0.5 mM cysteine and 100 microM cysteamine were supplemented together. In conclusion, addition of 0.5 mM cysteine and 100 microM cysteamine to the maturation medium improved IVM of canine oocytes.
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Affiliation(s)
- Mohammad Shamim Hossein
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
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Jang G, Lee BC, Kang SK, Hwang WS. Effect of glycosaminoglycans on the preimplantation development of embryos derived from in vitro fertilization and somatic cell nuclear transfer. Reprod Fertil Dev 2007; 15:179-85. [PMID: 12921704 DOI: 10.1071/rd02054] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The purpose of this study was to evaluate the effect of glycosaminoglycans (GAGs) added to the culture medium on the developmental competence of bovine embryos derived from in vitro fertilization (IVF) and from somatic cell nuclear transfer (SCNT). In vitro-matured oocytes were either inseminated with 1 x 10(6) spermatozoa mL(-1) or enucleated and reconstructed with bovine adult ear fibroblasts by SCNT. The embryos were then cultured in modified synthetic oviduct fluid (mSOF) containing 8 mg mL(-1) bovine serum albumin (BSA) (control mSOF) or control mSOF supplemented with various GAGs (hyaluronic acid, heparin or chondroitin sulfate) in a dose-dependent manner (0.1, 0.5 or 1.0 mg mL(-1)). Developmental competence was evaluated by monitoring the numbers of 2-cell embryos, 8-16-cell embryos and blastocysts. The mean cell number of flattened blastocysts stained with 5 microM bisbenzimide on Day 8 was counted. The percentage of blastocyst formation (IVF and SCNT embryos) from cleaved embryos was significantly higher (P < 0.05) in control mSOF supplemented with 0.5 mg mL(-1) hyaluronic acid (45% and 47%), heparin (40% and 47%) or chondroitin sulfate (38% and 44%) compared with control mSOF (30-31% and 30-33%). When compared with the efficacy of 0.5 mg mL(-1) GAGs, no significant differences were observed in the developmental competence of both IVF and SCNT embryos. Supplementing control mSOF with 0.5 mg mL(-1) GAGs had no effect on the cell number of IVF embryos. In contrast, supplementing 0.5 mg mL(-1) of hyaluronic acid, heparin or chondroitin sulfate to control mSOF significantly (P < 0.05) increased the numbers of total cells (93-98 v. 88 cells) and trophectoderm (TE) cells (64-66 v. 55 cells), and decreased the inner cell mass (ICM) to TE cell ratio (48.2-49.8 v. 61.3) in SCNT blastocysts compared with embryos in control mSOF. In conclusion, supplementation of culture media with GAGs may improve the development of bovine IVM-IVF and SCNT embryos to the blastocyst stage. The GAGs increased the quality of blastocysts by increasing total cell numbers in the SCNT embryos.
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Affiliation(s)
- Goo Jang
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul, Korea
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Lee E, Jeong YI, Park SM, Lee JY, Kim JH, Park SW, Hossein MS, Jeong YW, Kim S, Hyun SH, Hwang WS. Beneficial effects of brain-derived neurotropic factor on in vitro maturation of porcine oocytes. Reproduction 2007; 134:405-14. [PMID: 17709559 DOI: 10.1530/rep-06-0288] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
In an effort to improve the quality ofin vitroproduced porcine embryos, we investigated the effect of brain-derived neurotropic factor (BDNF), a neurotropin family member, onin vitromaturation (IVM) of porcine oocytes. The expression of BDNF and truncated isoforms of its receptor, tyrosine kinase B (TrkB), and p75 common neurotropin receptor was detected in both follicular cells and metaphase-I stage oocytes by RT-PCR. However, mRNA of full-length TrkB was not found in oocytes although it was detected in follicular cells. The expression pattern of BDNF and TrkB was confirmed by immunohistochemistry. Supplementation with BDNF (30 ng/ml) during IVM significantly (P< 0.05) increased the first polar body extrusion and glutathione levels in oocytes, whereas the effect of BDNF on nuclear maturation was diminished when gonadotropin and epidermal growth factor (EGF) were added to the culture media. However, treatment with BDNF (30 ng/ml) along with EGF (10 ng/ml) in the presence of gonadotropin significantly (P< 0.05) increased the developmental competence of oocytes to the blastocyst stage after bothin vitrofertilization (IVF; 29.1% when compared with control, 15.6%) and somatic cell nuclear transfer (SCNT; 13.6% when compared with control, 3%). This appeared to reflect a stimulatory interaction between BDNF and EGF to enhance the cytoplasmic maturation of oocytes to support successful preimplantation development. In conclusion, BDNFenhanced nuclearand cytoplasmic maturation of oocytes by autocrine and/or paracrine signals. Also, when used together with EGF, BDNF increased the developmental potency of embryos after IVF and SCNT, demonstrating an improvedin vitroproduction protocol for porcine oocytes.
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Affiliation(s)
- Eugine Lee
- SooAm Biotech Research Foundation, Sooambuilding 1027-4, Bangbae3-dong, Seocho-gu, Seoul 137-851, South Korea
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Kim S, Kim JH, Lee EG, Jeong YW, Park SM, Hossein MS, Park SW, Lee JY, Jeong YI, Kim YW, Hyun SH, Hwang WS. ESTABLISHMENT OF PORCINE EMBRYONIC STEM CELLS DERIVED FROM CLONED BLASTOCYSTS RECONSTRUCTED WITH FETAL AND NEWBORN FIBROBLASTS OF HUMAN DECAY-ACCELERATING FACTOR (HDAF) TRANSGENIC PIGS. Biol Reprod 2007. [DOI: 10.1093/biolreprod/77.s1.113c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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