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Effect of the Isolation Method of Mouse Inner Cell Mass, Types of Feeder Cells and Treatment Time of Mitomycin C on the Formation Rate of ICM Colony  

Jang, Ho-Jin (Department of Obstetrics and Gynecology, College of Medicine, Pusan National University)
Ko, Kyung-Rae (Clinic of Infertility, Pusan National University Hospital)
Kim, Mi-Kyung (Clinic of Infertility, Pusan National University Hospital)
Na, Yong-Jin (Department of Obstetrics and Gynecology, College of Medicine, Pusan National University)
Lee, Kyu-Sup (Department of Obstetrics and Gynecology, College of Medicine, Pusan National University)
Publication Information
Clinical and Experimental Reproductive Medicine / v.33, no.4, 2006 , pp. 265-272 More about this Journal
Abstract
Objective: This study was carried out to evaluate the effect of the isolation methods of inner cell mass from mouse blastocyst, types of feeder cells and treatment time of mitomycin C on the formation rate of ICM colony. Methods: The inner cells were isolated by conventional immunosurgery, partial trophoblast dissection with syringe needles and whole blastocyst co-culture method. Commercially available STO and primary cultured mouse embryonic fibroblast (pMEF) feeder cells were used, and mitomycin C was treated for 1, 2 or 3 hours, respectively. The formation rate of ICM colony was observed after isolation of ICM and culture of ICM on the feeder cells for 7 days. Result: The ICM colony formation rate on STO were significantly higher in partial trophoblast dissection group (58%) than that in immunosurgery (12%) or whole blastocyst culture (16%) group (p<0.05). The formation rate on pMEF feeder layer was higher in partial trophoblast dissection (88%) and whole blastocyst culture (82%) group than that in immunosurgery (16%) group (p<0.05). When mitomycin C treated to pMEF for 2 hours, the formation rate of 88% was significantly higher than those of other conditions. Conclusion: Above results showed that the efficient isolation method of ICM from blastocyst was the partial trophoblast dissection and the appropriate treatment time of mitomycin C was 2 hours. However, the subculture of ICM colony and characterization of stem cells should be carried out to confirm the efficacy of the partial trophoblast dissection method.
Keywords
ICM colony; Feeder layer; Isolation method; Mitomycin C;
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