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Related Concept Videos

Epigenetic Regulation01:37

Epigenetic Regulation

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Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
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Methods of Nuclear Reprogramming01:24

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Nuclear reprogramming is a process of transforming one cell type into an unrelated cell type by epigenetic changes that alter the cell’s original gene expression pattern. Such epigenetic changes force cells to express a different set of genes, which play a significant role in inducing transformation into other cell types. Nuclear reprogramming offers applications in reproductive cloning for livestock propagation and regenerative medicine — developing patient-specific cells for...
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Reprogramming alters the gene expression in somatic cells, transforming them into induced pluripotent stem (iPS) cells over several generations. Scientists can reprogram cells by introducing genes for four transcription factors—Oct4, Sox2, Klf4, and c-Myc (OSKM) by viral or non-viral methods. These factors are also known as Yamanaka factors after Shinya Yamanaka, who first generated iPS cells using mouse skin cells. Yamanaka was awarded the Nobel Prize in Physiology or Medicine in 2012...
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Chromatin Modification in iPS Cells01:32

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Chromatin modification alters gene expression; therefore, scientists can add histone-modifying enzymes, histone variants, and chromatin remodeling complexes to somatic cells to aid reprogramming into pluripotent stem (iPS) cells.
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Combinatorial Gene Control02:33

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Combinatorial gene control is the synergistic action of several transcriptional factors to regulate the expression of a single gene. The absence of one or more of these factors may lead to a significant difference in the level of gene expression or repression.
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Role Of Notch Signalling In Intestinal Stem Cell Renewal01:12

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Related Experiment Video

Updated: May 22, 2025

HOX Loci Focused CRISPR/sgRNA Library Screening Identifying Critical CTCF Boundaries
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FOXO4-SP6 axis controls surface epithelium commitment by mediating epigenomic remodeling.

Jiafeng Liu1, Huaxing Huang1, Fengjiao An1

  • 1State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China.

Stem Cell Reports
|March 14, 2025
PubMed
Summary

Researchers identified FOXO4 and SP6 as key regulators of surface epithelium (SE) development. This FOXO4-SP6 axis is crucial for SE fate determination and appendage formation, offering insights into ectodermal dysplasia.

Keywords:
FOXO4KRT8 reporter systemSP6super-enhancersurface epithelium

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Area of Science:

  • Developmental biology
  • Molecular genetics
  • Epithelial biology

Background:

  • Proper development of surface epithelium (SE) is essential for ectodermal appendages.
  • Molecular mechanisms of SE commitment are not well understood.

Purpose of the Study:

  • To identify novel regulators of surface epithelium (SE) commitment.
  • To elucidate the molecular mechanisms governing SE fate determination.

Main Methods:

  • Development of a KRT8 reporter system.
  • Identification of FOXO4 and SP6 as key regulators.
  • Analysis of chromatin accessibility and histone modifications (H3K4me3, H3K27ac).

Main Results:

  • FOXO4 and SP6 were identified as essential regulators of SE commitment.
  • The FOXO4-SP6 axis critically governs SE fate.
  • FOXO4 influences SE initiation via chromatin accessibility and H3K4me3 deposition.
  • SP6, as a FOXO4 effector, activates SE-specific genes by modulating H3K27ac in super-enhancers.

Conclusions:

  • The FOXO4-SP6 axis plays a vital role in surface epithelium (SE) development.
  • Understanding SE fate decisions is enhanced by this study.
  • Provides a foundation for therapeutic strategies for ectodermal dysplasia.