Abstract:
:Two-cell mouse embryos were frozen by direct plunging into liquid nitrogen after a 3-min exposure to solutions containing 0.25 M sucrose with 1.5, 3, or 4.5 M dimethyl sulfoxide (Me2SO), and 0, 4, 8, 16, or 32 mg/ml bovine serum albumin (BSA). In the absence of BSA, significantly more embryos were lost or damaged during freezing and thawing. Increasing the BSA concentration from 4 to 32 mg/ml had no significant effect on subsequent embryo viability in vivo or in vitro. Blastocyst formation in vitro was greater than 90% in embryos exposed to the cryoprotective solutions only. Although development to blastocysts was not significantly different to nonfrozen controls in most groups frozen in 3 and 4.5 M Me2SO (up to 92% blastocysts), it was significantly reduced when embryos were frozen in 1.5 M Me2SO (up to 65% blastocysts). The development to fetuses of embryos frozen in 3 M Me2SO (64 to 74% fetuses) was not significantly different from nonfrozen controls (68 to 79% fetuses) or embryos frozen by a conventional slow cooling method (70%). Frozen thawed two-cell embryos developed into normal adults which were able to reproduce normally. We conclude that this freezing method can efficiently cryopreserve early cleavage stage mouse embryos.
journal_name
Cryobiologyjournal_title
Cryobiologyauthors
Shaw JM,Trounson AOdoi
10.1016/0011-2240(89)90066-7subject
Has Abstractpub_date
1989-10-01 00:00:00pages
413-21issue
5eissn
0011-2240issn
1090-2392pii
0011-2240(89)90066-7journal_volume
26pub_type
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