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Production of mouse by inter-strain inner cell mass replacement

Published online by Cambridge University Press:  19 May 2005

Yue-Liang Zheng
Affiliation:
State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, People's Republic of China. Graduate School of the Chinese Academy of Sciences, Beijing, People's Republic of China.
Man-Xi Jiang
Affiliation:
State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, People's Republic of China.
Ying-Chun OuYang
Affiliation:
State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, People's Republic of China.
Qing-Yuan Sun
Affiliation:
State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, People's Republic of China.
Da-Yuan Chen
Affiliation:
State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, People's Republic of China.

Abstract

The developmental ability of reconstructed blastocysts from C57BL/6 strain mouse inner cell masses (ICMs) and Kunming strain mouse trophoblasts was assessed. The procedure of ICM replacement was as follows: C57BL/6 ICMs were separated from the blastocysts using immunosurgery. A slit was made in the zona pellucida of a Kunming blastocyst to allow its ICM to extrude. The C57BL/6 ICM was injected into the Kunming blastocoele, and the extruded Kunming ICM was cut off. The reconstructed blastocysts were able to re-expand (77%) and hatch (27.3%) in vitro. A total of 64 reconstructed blastocysts and 124 Kunming blastocysts were co-transferred into the uteri of 11 pseudopregnant Kunming mice, and an ICM replacement offspring was born. The results indicate that reconstructed embryos obtained by inter-strain ICM replacement have the ability to develop to term. This technique may provide a method to solve the pregnancy failure in interspecific cloning.

Type
Research Article
Copyright
2005 Cambridge University Press

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