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Published on: May 30, 2012
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Nanog positively regulates Zfp57 expression in mouse embryonic stem cells
Yukari Yamaguchi1, Hiroyuki Takamura1, Yuhki Tada2
1Department of Gastroenterologic Surgery, Graduate School of Medical Sciences, Kanazawa University, Ishikawa, Japan.
Biochemical and Biophysical Research Communications
|December 3, 2014
Summary
Nanog transcription factor positively regulates Zinc finger protein 57 (Zfp57) expression in embryonic stem cells and human tumor cells. This Nanog/Zfp57 pathway is crucial for anchorage-independent growth.
Area of Science:
- Stem cell biology
- Molecular biology
- Cancer research
Background:
- Embryonic stem (ES) cell self-renewal is maintained by core transcription factors like Oct3/4, STAT3, and Nanog.
- Zinc finger protein 57 (Zfp57) is expressed in self-renewing ES cells and downregulated during differentiation, suggesting regulation by core factors.
Purpose of the Study:
- To investigate the regulatory relationship between Nanog and Zfp57 expression.
- To elucidate the role of the Nanog/Zfp57 pathway in ES cell growth.
Main Methods:
- Gene expression analysis (overexpression and knockdown of Nanog).
- Promoter region analysis to identify Nanog-responsive elements.
- Soft agar assays to assess anchorage-independent growth.
Main Results:
- Nanog overexpression upregulated Zfp57, while Nanog knockdown reduced Zfp57 levels.
- A Nanog-responsive region was identified in the Zfp57 promoter.
- Nanog promoted ES cell anchorage-independent growth, a process suppressed by Zfp57 knockdown.
- NANOG also upregulated ZFP57 in human tumor cell lines.
Conclusions:
- Nanog acts as an upstream regulator of Zfp57 expression.
- The Nanog/Zfp57 pathway plays a significant role in the anchorage-independent growth of ES cells.
- Nanog positively regulates Zfp57 expression across different cell types, including tumor cells.
