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Related Concept Videos

Maintenance of the ES Cell State01:14

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The cells of the blastocyst inner cell mass only remain pluripotent for a short time. This state of pluripotency and self-renewal can be maintained in embryonic stem (ES) cell culture by adding specific chemicals or growth factors to ensure the cells can continue dividing and later differentiate into different cell types. In some cases, the cells are grown on a feeder layer of differentiated cells, which provides the growth factors and extracellular matrix components necessary for stem cell...
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Embryonic stem (ES) cells were first discovered in mice in 1981 by Martin Evans. In 1998, James Thomson identified a method to isolate embryonic stem cells from humans. Human embryonic stem cells (hESCs) are obtained from 3-5 day old embryos that remain unused after an in vitro fertilization procedure.
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Related Experiment Video

Updated: May 4, 2026

Oct4GiP Reporter Assay to Study Genes that Regulate Mouse Embryonic Stem Cell Maintenance and Self-renewal
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Patz1 regulates embryonic stem cell identity.

Jin Rong Ow1, Hui Ma, Angela Jean

  • 11 Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore , Singapore, Singapore .

Stem Cells and Development
|January 2, 2014
PubMed
Summary

Patz1 is a crucial regulator of embryonic stem cell (ESC) pluripotency. This zinc finger protein directly controls key genes like Pou5f1 and Nanog, maintaining pluripotency by repressing developmental genes.

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Area of Science:

  • Developmental Biology
  • Stem Cell Biology
  • Molecular Genetics

Background:

  • Embryonic stem cells (ESCs) are pluripotent, with pluripotency maintained by a transcriptional network involving master regulators Oct4 and Nanog.
  • Zinc finger transcription factors play significant roles in this network, but the function of Patz1 in pluripotency remains understudied.

Purpose of the Study:

  • To investigate the role of Patz1, a zinc finger protein, in regulating pluripotency in ESCs.
  • To elucidate the molecular mechanisms by which Patz1 influences ESC gene expression and developmental potential.

Main Methods:

  • RNA interference (RNAi) for Patz1 knockdown.
  • Chromatin immunoprecipitation (ChIP) and reporter assays to determine direct gene regulation.
  • Global transcriptome analysis (RNA sequencing) to assess gene expression changes.
  • ChIP sequencing to identify Patz1 binding sites genome-wide.
  • Gene ontology analysis and embryoid body assays to evaluate developmental gene regulation.

Main Results:

  • Patz1 directly regulates the expression of Pou5f1 (Oct4) and Nanog, key pluripotency factors.
  • Patz1 knockdown leads to upregulation of apoptotic genes and downregulation of cell cycle and metabolism genes.
  • Patz1 binds to over 5,000 genomic sites, with associated genes enriched near developmental genes.
  • Patz1 appears to repress developmental genes, as suggested by embryoid body assays.

Conclusions:

  • Patz1 is an important regulator of ESC pluripotency.
  • Patz1 directly controls master pluripotency genes and influences global gene expression patterns.
  • Patz1 plays a role in repressing developmental genes, contributing to the maintenance of the pluripotent state.