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1083-351X292412017Oct13The Journal of biological chemistryJ Biol ChemThe transcription factor Gbx2 induces expression of Kruppel-like factor 4 to maintain and induce naïve pluripotency of embryonic stem cells.171211712817121-1712810.1074/jbc.M117.803254The transcription factor Gbx2 (gastrulation brain homeobox 2) is a direct target of the LIF/STAT3 signaling pathway, maintains mouse embryonic stem cell (mESC) self-renewal, and facilitates mouse epiblast stem cell (mEpiSC) reprogramming to naïve pluripotency. However, the mechanism by which Gbx2 mediates its effects on pluripotency remains unknown. Here, using an RNA-Seq approach, we identified Klf4 (Kruppel-like factor 4) as a direct target of Gbx2. Functional studies indicated that Klf4 mediates the self-renewal-promoting effects of Gbx2, because knockdown of Klf4 expression abrogated the ability of Gbx2 to maintain the undifferentiated state of mESCs. We also found that Gbx2 largely depends on Klf4 to reprogram mEpiSCs to a mESC-like state. In summary, our study has uncovered a mechanism by which Gbx2 maintains and induces naïve pluripotency. These findings expand our understanding of the pluripotency control network and may inform the development of culture conditions for improved ESC maintenance and differentiation.© 2017 by The American Society for Biochemistry and Molecular Biology, Inc.WangManmanMFrom the Center for Stem Cell and Translational Medicine, School of Life Sciences, Anhui University, Hefei 230601, China and.TangLingLFrom the Center for Stem Cell and Translational Medicine, School of Life Sciences, Anhui University, Hefei 230601, China and.LiuDahaiDFrom the Center for Stem Cell and Translational Medicine, School of Life Sciences, Anhui University, Hefei 230601, China and.YingQi-LongQLthe Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research at USC, Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California 90033.YeShoudongSFrom the Center for Stem Cell and Translational Medicine, School of Life Sciences, Anhui University, Hefei 230601, China and shdye@126.com.engJournal Article20170828
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