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http://dx.doi.org/10.12750/JET.2015.30.3.195

Effects of Permeable Cryoprotectants on Viability of Mammalian Embryo Model  

Kim, Hyun (Animal Genetic Resources Research Center, National Institute of Animal Science, RDA)
Cho, Sang-Rae (Hanwoo Research Station, National Institute of Animal Science, RDA)
Kim, Dong Kyo (Animal Genetic Resources Research Center, National Institute of Animal Science, RDA)
Choe, Changyong (Animal Genetic Resources Research Center, National Institute of Animal Science, RDA)
Seong, Hwan-Hoo (Animal Genetic Resources Research Center, National Institute of Animal Science, RDA)
Publication Information
Journal of Embryo Transfer / v.30, no.3, 2015 , pp. 195-200 More about this Journal
Abstract
The objective of this study was to evaluate the toxicities of permeable cryoprotectants and finally to establish the cryopreservation method of surplus embryos obtained during assisted reproductive technology (ART). Toxicities of permeable cryoprotectants, dimethyl sulfoxide (DMSO), ethylene glycol (EG), Glycerol, and 1,2-PROH were investigated using a murine embryo model. Female $F-{_1}$ mice were stimulated with gonadotropin, induced ovulation with hCG and mated. Two cell embryos were collected and cultured after exposure to among DMSO, EG, Glycerol, and 1,2-PROH. Embryo development was evaluated up to the blastocyst stage. The total cell count of blastocysts that were treated with DMSO and Glycerol at the 2-cell stage was significantly lower than that were treated with EG ($81.1{\pm}15.1$), 1,2-PROH ($88.0{\pm}21.1$) or the control ($99.9{\pm}21.3$) (p<0.001). On comparison of four cryoprotectant treated groups, the DMSO and Glycerol treated group showed a decreased cell count compared with the EG and 1,2-PROH treated group (p<0.05). Both DMSO ($14.7{\pm}1.3$), EG ($12.1{\pm}1.1$), Glycerol ($15.2{\pm}1.8$), and 1,2-PROH ($11.5{\pm}1.3$) treated groups showed higher apoptosis rates of cells in the blastocyst compared with the control ($6.5{\pm}0.7$, p<0.0001). In addition, the DMSO or Glycerol treated group showed more apoptotic cells than the EG or 1,2-PROH treated group (p<0.001). The potential toxicity of cryoprotectants was uncovered by prolonged exposure of murine embryos to among DMSO, EG, Glycerol, and 1,2-PROH at room temperature. When comparing four permeable cryoprotective agents, EG and 1,2-PROH appeared to be less toxic than DMSO and Glycerol at least in a murine embryo model.
Keywords
cryoprotectant; DMSO; EG; toxicity; embryo; apoptosis; Glycerol; 1,2-PROH;
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