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Journal of Zhejiang University SCIENCE B 2007 Vol.8 No.8 P.533~539

http://doi.org/10.1631/jzus.2007.B0533


Cumulus-specific genes are transcriptionally silent following somatic cell nuclear transfer in a mouse model


Author(s):  TONG Guo-qing, HENG Boon-chin, NG Soon-chye

Affiliation(s):  Nuclear Reprogramming and Stem Cell Laboratory, Department of Obstetrics and Gynecology, Yong Loo Lin School of Medicine, National University of Singapore, 119074 Singapore; more

Corresponding email(s):   denhenga@nus.edu.sg

Key Words:  Somatic cell nuclear transfer (SCNT), Nuclear reprogramming, Embryo, Development


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TONG Guo-qing, HENG Boon-chin, NG Soon-chye. Cumulus-specific genes are transcriptionally silent following somatic cell nuclear transfer in a mouse model[J]. Journal of Zhejiang University Science B, 2007, 8(8): 533~539.

@article{title="Cumulus-specific genes are transcriptionally silent following somatic cell nuclear transfer in a mouse model",
author="TONG Guo-qing, HENG Boon-chin, NG Soon-chye",
journal="Journal of Zhejiang University Science B",
volume="8",
number="8",
pages="533~539",
year="2007",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.2007.B0533"
}

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%T Cumulus-specific genes are transcriptionally silent following somatic cell nuclear transfer in a mouse model
%A TONG Guo-qing
%A HENG Boon-chin
%A NG Soon-chye
%J Journal of Zhejiang University SCIENCE B
%V 8
%N 8
%P 533~539
%@ 1673-1581
%D 2007
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2007.B0533

TY - JOUR
T1 - Cumulus-specific genes are transcriptionally silent following somatic cell nuclear transfer in a mouse model
A1 - TONG Guo-qing
A1 - HENG Boon-chin
A1 - NG Soon-chye
J0 - Journal of Zhejiang University Science B
VL - 8
IS - 8
SP - 533
EP - 539
%@ 1673-1581
Y1 - 2007
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.2007.B0533


Abstract: 
This study investigated whether four cumulus-specific genes: follicular stimulating hormone receptor (FSHr), hyaluronan synthase 2 (Has2), prostaglandin synthase 2 (Ptgs2) and steroidogenic acute regulator protein (Star), were correctly reprogrammed to be transcriptionally silent following somatic cell nuclear transfer (SCNT) in a murine model. Cumulus cells of C57×CBA F1 female mouse were injected into enucleated oocytes, followed by activation in 10 µmol/L strontium chloride for 5 h and subsequent in vitro culture up to the blastocyst stage. Expression of cumulus-specific genes in SCNT-derived embryos at 2-cell, 4-cell and day 4.5 blastocyst stages was compared with corresponding in vivo fertilized embryos by real-time PCR. It was demonstrated that immediately after the first cell cycle, SCNT-derived 2-cell stage embryos did not express all four cumulus-specific genes, which continually remained silent at the 4-cell and blastocyst stages. It is therefore concluded that all four cumulus-specific genes were correctly reprogrammed to be silent following nuclear transfer with cumulus donor cells in the mouse model. This would imply that the poor preimplantation developmental competence of SCNT embryos derived from cumulus cells is due to incomplete reprogramming of other embryonic genes, rather than cumulus-specific genes.

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Open peer comments: Debate/Discuss/Question/Opinion

<1>

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