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Reactive oxygen species-mediated unfolded protein response pathways in preimplantation embryos
Ihsan Ali, Syed Zahid Ali Shah, Yi Jin, Zhong-Shu Li, Obaid Ullah, Nan-Zhu Fang 대한수의학회 Journal of Veterinary Science 9 Pages
대한수의학회 Journal of Veterinary Science 2017, 제 18권 제 1호 1 1-9 (9 pages)
ER is a multifunctional cellular organelle responsible for protein folding, modification, and cellular homeostasis. ER stress is activated by a variety of factors including ROS. Such stress leads to activation of the adaptive unfolded protein response (UPR), which restores homeostasis. However, chronic stress can exceed the toleration level of the ER, resulting in cellular apoptosis. In this review, we briefly describe the generation and impact of ROS in preimplantation embryo development, the... -
Factors affecting the success of resynchronization protocols with or without progesterone supplementation in dairy cows
Annette Forro , Georgios Tsousis, Nicola Beindorff, Ahmad Reza Sharifi, Christos Brozos, Heinrich Bollwein 대한수의학회 Journal of Veterinary Science 6 Pages
대한수의학회 Journal of Veterinary Science 2015, 제 16권 제 1호 16 121-126 (6 pages)
0 and 7 of these protocols as well as 4 and 5 days post-insemination. Progesterone supplementation raised the P4 levels on Day 7 (p ＜ 0.05), but had no overall effect on resynchronization rates (RRs) or pregnancy per artificial insemination (P/AI). However, cows with Body Condition Score (BCS) ＞ 3.5 had increased P/AI values while cows with BCS ＜ 2.75 had decreased P/AI rates after P4 supplementation. Primiparous cows had higher P4 values on Day 7 than pluriparous... -
Identification of abnormal gene expression in bovine transgenic somatic cell nuclear transfer embryos
Jongki Cho, Sungkeun Kang, Byeong Chun Lee* 대한수의학회 Journal of Veterinary Science 7 Pages
대한수의학회 Journal of Veterinary Science 2014, 제 15권 제 2호 8 225-231 (7 pages)
This study was conducted to investigate the expression of three genes related to early embryonic development in bovine transgenic cloned embryos. To accomplish this, development of bovine transgenic somatic cell nuclear transfer (SCNT) embryos was compared with non-transgenic embryos. Next, mRNA transcription of three specific genes (DNMT1, Hsp 70.1, and Mash2) related to early embryo development in transgenic SCNT embryos was compared between transgenic and non-transgenic SCNTs, parthenogenetic... -
Improved assessment of frozen/thawed mouse spermatozoa using fluorescence microscopy
Ann-Kathrin Diercks, Heinrich F. B?rgers, Anna Schwab, Johannes Schenkel* 대한수의학회 Journal of Veterinary Science 8 Pages
대한수의학회 Journal of Veterinary Science 2012, 제 13권 제 3호 14 315-322 (8 pages)
the same mouse line might be heterogeneous and the cryopreservation procedure might also be error-prone. However, only limited amounts of material are available for analysis. To improve the monitoring of frozen/thawed spermatozoa, commonly used in vitro fertilization (IVF) followed by embryo transfer were replaced with animal-free techniques. Major factors for assessing spermatozoa quality (i.e., density, viability, motility, and morphology) were evaluated by fluorescence microscopy. For this, a... -
Transmission electron microscopy for characterization of acrosomal damage after Percoll gradient centrifugation of cryopreserved bovine spermatozoa
Letícia Z. Oliveira*, Vera F. M. Hossepian de Lima, Marcelo A. Levenhagen, Ricarda M. dos Santos, Terezinha I. Assumpç 대한수의학회 Journal of Veterinary Science 6 Pages
대한수의학회 Journal of Veterinary Science 2011, 제 12권 제 3호 10 267-272 (6 pages)
acrosomal ultrastructure following discontinuous Percoll gradient centrifugation of cryopreserved bovine sperm. Semen was collected from six bulls of different breeds and three ejaculates per bull were evaluated. Frozen semen samples were thawed and the acrosomal region of sperm cells was evaluated by transmission electron microscopy (TEM) before (n = 18) and after (n = 18) Percoll centrifugation. The evaluation of 20 sperm heads from each of the 36 samples analyzed ensured that a large number... -
Cloned calves derived from somatic cell nuclear transfer embryos cultured in chemically defined medium or modified synthetic oviduct fluid
Goo Jang*, So Gun Hong, Byeong Chun Lee* 대한수의학회 Journal of Veterinary Science 7 Pages
대한수의학회 Journal of Veterinary Science 2011, 제 12권 제 1호 12 83-89 (7 pages)
oocytes matured in vitro were reconstructed with fetal fibroblasts, fused, and activated. The cloned embryos were cultured in modified synthetic oviduct fluid (mSOF) or a chemically defined medium (CDM) and developmental competence was monitored. After 7 days of culturing, the blastocysts were transferred into the uterine horn of estrus-synchronized recipients. SCNT embryos that were cultured in mSOF or CDM developed to the blastocysts stages at similar rates (26.6% vs. 22.5%, respectively). A... -
Microtubule distribution in somatic cell nuclear transfer bovine embryos following control of nuclear remodeling type
Dae-Jin Kwon, Yu-Mi Lee, In-Sun Hwang, Choon-Keun Park, Boo-Keun Yang, Hee-Tae Cheong 대한수의학회 Journal of Veterinary Science 9 Pages
대한수의학회 Journal of Veterinary Science 2010, 제 11권 제 2호 1 93-101 (9 pages)
min, 3 h, and 20 h of fusion using laser scanning confocal microscopy. The g-tubulin foci inherited from the donor centrosome were observed in most of the SCNT embryos at 15 min of fusion (91.3%) and most of them did not disappear until 3 h after fusion, regardless of treatment (82.9-87.2%). A significantly high proportion of embryos showing an abnormal chromosome or microtubule distribution was observed in the roscovitine- treated group (40.0%, p ＜ 0.05) compared to the caffeine- treated group... -
Production of cloned sei whale (Balaenoptera borealis) embryos by interspecies somatic cell nuclear transfer using enucleated pig oocytes
Eunsong Lee, Mohammad Musharraf Uddin Bhuiyan, Hiroyuki Watanabe, Kohji Matsuoka, Yoshihiro Fujise, Hajime Ishikawa, Yutaka Fuku 대한수의학회 Journal of Veterinary Science 8 Pages
대한수의학회 Journal of Veterinary Science 2009, 제 10권 제 4호 2 285-292 (8 pages)
stage. This developmental arrest was not overcome by increasing the osmolarity of the medium to 360 mOsm or by the addition of fetal bovine or fetal whale serum. Our results demonstrate that sei whale-porcine hybrid embryos may be produced by SCNT using subzonal injection and electrofusion. The pig oocytes partly supported the remodeling and reprogramming of the sei whale somatic cell nuclei, but they were unable to support the development of iSCNT whale embryos to the blastocyst stage. -
In vivo alternative testing with zebrafish in ecotoxicology
Seung-Hyeok Seok, Min-Won Baek, Hui-Young Lee, Dong-Jae Kim, Yi-Rang Na, Kyoung-Jin Noh, Sung-Hoon Park, Hyun-Kyoung Lee, Byoung 대한수의학회 Journal of Veterinary Science 8 Pages
대한수의학회 Journal of Veterinary Science 2008, 제 9권 제 4호 3 351-358 (8 pages)
toxicity levels with the well-known aryl hydrocarbon receptor (AhR)-binding toxicants: 3,3',4,4',5-pentachlorobiphenyl (PCB126), 2,3,7,8-tetrachlorodibenzo-p-dioxin, and 3-methylcholanthrene. These toxicants induced a concentration-dependent increase in morphological disruption, indicating toxicity at early life-stages. The transient transgenic zebrafish liver cell line was sensitive enough to these toxicants to express the CYP1A1 regulated enhanced green fluorescent protein. The findings of... -
Evaluation of the effect of a 3rd GnRH injection administered six days after the 2nd GnRH injection of Ovsynch on the reproductive performance of Japanese black cows
Abdurraouf Omar Gaja, Katsumi Hamana, Chikara Kubota, Toshiyuki Kojima 대한수의학회 Journal of Veterinary Science 8 Pages
대한수의학회 Journal of Veterinary Science 2008, 제 9권 제 3호 7 273-280 (8 pages)
on days 11, 12, 17 and 18 in the group 1 and from day 10 to 21 in the group 2. In Experiment 2, 41 cows were assigned to the same three groups described above and then artificially inseminated on day 1. The pregnancy rates on day 45 did not differ among groups. In conclusion, administration of GnRH analogue on day 6 following Ovsynch-based treatment did not improve the reproductive performance of Japanese black cows, even though the P4 concentration was higher in groups that received the GnRH.
