The survival of whole and bisected rabbit morulae after cryopreservation by the vitrification method.

The survival of whole and bisected rabbit morulae after cryopreservation by the vitrification method. Research Abstract Details 

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The survival of whole and bisected rabbit morulae after cryopreservation by the vitrification method. Abstract Text:

K Kobayashi,H Nagashima,H Yamakawa,Y Kato,S Ogawa,

The survival of whole and bisected rabbit morulae cryopreserved by the vitrification method was investigated. The embryos were loaded in a column of vitrification solution (VS, a mixture of 25% glycerol and 25% 1, 2-propanediol in PBS+16% calf serum), which was located between two columns of 1 M sucrose solution in a plastic straw. The embryos were frozen by being plunged into liquid nitrogen and thawed in a water bath at 20 degrees C. Two methods of loading embryos into straws were used: the single and double column vitrification solution methods. The embryonic survival rates between these two methods were compared. Seventy-one (86.6%) out of 82 morulae vitrified in double column straws developed into the blastocyst stage in vitro. Eleven (18.3%) live fetuses were obtained after the transfer of 60 frozen-thawed morulae to four recipients. By contrast, the survival rate (36.5%, 27 74 ) of embryos vitrified in the single column straws was significantly lower (P<0.05). The vitrification solution of the single column straws became opaque, indicating ice-crystal formation, upon thawing in 5 of 11 straws, which was assumed to have damaged the embryos. More than 80% (29 36 ) of the bisected morulae frozen and thawed in the double column straws developed to the blastocyst stage in vitro when cryoprotectant was diluted stepwise with 1 M and 0.25 M sucrose solution. When the cryoprotectant was removed by one-step dilution with 1 M sucrose solution, swelling in blastomeres was observed and the development rate of the recovered embryos decreased (45.8%, 11 24 ). These results indicate that the vitrification method employed in our experiment is not only efficient for the cryopreservation of rabbit morulae, but it can also be used for the preservation of bisected rabbit morulae, which had not been successful using previous methods.

The survival of whole and bisected rabbit morulae after cryopreservation by the vitrification method. Publishing Authors By Initials

K Kobayashi,H Nagashima,H Yamakawa,Y Kato,S Ogawa,

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The survival of whole and bisected rabbit morulae after cryopreservation by the vitrification method. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Theriogenology

VOLUME: 33

Page Numbers: 777-88

Journal Abbreviation: Theriogenology

ISSN: 0093-691X

DAY: 26

MONTH: Apr

YEAR: 1990

The survival of whole and bisected rabbit morulae after cryopreservation by the vitrification method. Information

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LANGUAGE: eng

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Grant and Affiliation Information for The survival of whole and bisected rabbit morulae after cryopreservation by the vitrification method.

AFFILIATION: Laboratory of Animal Reproduction, Ikuta-Campus Meiji University, 1-1-1 Higashimita, Tama-ku Kawasaki 214, Japan.

Country: United States

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MEDLINETA: Theriogenology

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