Germline competency of parthenogenetic embryonic stem cells from immature oocytes of adult mouse ovary.
Parthenogenetic embryonic stem cells (pESCs) have been generated in several mammalian species from parthenogenetic embryos that would otherwise die around mid-gestation. However, previous reports suggest that pESCs derived from in vivo ovulated (IVO) mature oocytes show limited pluripotency, as evidenced by low chimera production, high tissue preference and especially deficiency in germline competence, a critical test for genetic integrity and pluripotency of ESCs. Here, we report efficient generation of germline-competent pESC lines (named as IVM pESCs) from parthenogenetic embryos developed from immature oocytes of adult mouse ovaries following in vitro maturation (IVM) and artificial activation. In contrast, pESCs derived from IVO oocytes show defective germline competence, consistent with previous reports. Further, IVM pESCs resemble more ESCs from fertilized embryos (fESCs) than do IVO pESCs on genome-wide DNA methylation and global protein profiles. In addition, IVM pESCs express higher levels of Blimp1, Lin28 and Stella, relative to fESCs, and in their embryoid bodies following differentiation. This may indicate differences in differentiation potentially to the germline. The mechanisms for acquisition of pluripotency and germline competency of IVM pESCs from immature oocytes remain to be determined.
School of Life Science, Sun Yat-Sen University, Guangzhou 510275, China.
Zhong
Z
Liu
Zhe
Z
Hu
Xinghua
X
Pan
Minshu
M
Li
Taiwo A
TA
Togun
David
D
Tuck
Mattia
M
Pelizzola
Junjiu
J
Huang
Xiaoying
X
Ye
Yu
Y
Yin
Mengyuan
M
Liu
Chao
C
Li
Zhisheng
Z
Chen
Fang
F
Wang
Lingjun
L
Zhou
Lingyi
L
Chen
David L
DL
Keefe
Lin
L
Liu
D000818:Animals; D000943:Antigens, Differentiation / Q000096:biosynthesis*; D053595:Embryonic Stem Cells / Q000166:cytology / Q000378:metabolism; D005260:Female; D051379:Mice; D009865:Oocytes / Q000166:cytology / Q000378:metabolism; D010053:Ovary / Q000166:cytology / Q000378:metabolism; D010312:Parthenogenesis; D039904:Pluripotent Stem Cells / Q000166:cytology / Q000378:metabolism
D000943:Antigens, Differentiation
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