Establishment of customized mouse stem cell lines by sequential nuclear transfer.
Therapeutic cloning, whereby embryonic stem cells (ESCs) are derived from nuclear transfer (NT) embryos, may play a major role in the new era of regenerative medicine. In this study we established forty nuclear transfer-ESC (NT-ESC) lines that were derived from NT embryos of different donor cell types or passages. We found that NT-ESCs were capable of forming embryoid bodies. In addition, NT-ESCs expressed pluripotency stem cell markers in vitro and could differentiate into embryonic tissues in vivo. NT embryos from early passage R1 donor cells were able to form full term developed pups, whereas those from late passage R1 ES donor cells lost the potential for reprogramming that is essential for live birth. We subsequently established sequential NT-R1-ESC lines that were developed from NT blastocyst of late passage R1 ESC donors. However, these NT-R1-ESC lines, when used as nuclear transfer donors at their early passages, failed to result in live pups. This indicates that the therapeutic cloning process using sequential NT-ESCs may not rescue the developmental deficiencies that resided in previous donor generations.
Zhao
Chunli
C
State Key Laboratory of Reproductive Biology, Chinese Academy of Sciences, Beijing 100080, China.
Yao
Ruqiang
R
Hao
Jie
J
Ding
Chenhui
C
Fan
Yong
Y
Dai
Xiangpeng
X
Li
Wei
W
Hai
Tang
T
Liu
Zichuan
Z
Yu
Yang
Y
Wang
Yingying
Y
Hou
Xiaojun
X
Ji
Weizhi
W
Zhou
Qi
Q
Jouneau
Alice
A
Zeng
Fanyi
F
Wang
Liu
L
D000818:Animals; D002460:Cell Line; D002467:Cell Nucleus / Q000502:physiology*; D019976:Cloning, Organism; D053595:Embryonic Stem Cells / Q000166:cytology* / Q000502:physiology; D005260:Female; D051379:Mice; D008810:Mice, Inbred C57BL; D008811:Mice, Inbred DBA; D053652:Nuclear Transfer Techniques