| Developmental potential of aggregated mouse embryos and production of chimeras after freezing |
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Sang-tae Shin1, Choong-ho Jo2 |
1Department of Veterinary Medicine, College of Agriculture, Chungnam National University
2College of Veterinary Medicine, Seoul National University |
| 동결보존한 마우스 집합배의 생존성과 chimera의 생산에 관한 연구 |
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신상태1, 조충호2 |
1충남대학교 농과대학 수의학과
2서울대학교 수의과대학 |
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| Abstract |
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The present study was carried out to investigate the viability of frozen-thawed aggregated mouse embryos and to produce the chimeras. Different phenotypic embryos were obtained by mating ICR female mice with ICR or CBA male mice. The aggregated morulae were produced following aggregation of embryos at 4-, 8- and 12- to 16-cell stage. The desirable stage for the aggregation of the mouse embryos was 8- to 16-cell stage. The post-thawed in vitro survival rates of aggregated embryos in glycerol, DMSO and ethylene glycerol were 51.5, 78.6 and 69.4%, respectively. Although the higher survival was obtained in DMSO, there were no significant differences in the survival rates among the three cryoprotectants. A total of 155 frozen-thawed aggregated embryos were transferred to 11 recipient mice, 3 out of 7 offsprings were born to overt chimera. These experiments have proven that mouse chimeras can be obtained from frozen-thawed aggregated embryos. |
| Key Words:
chimera, aggregation, freezing, mouse, embryos |
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