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Updated: Jul 4, 2025
07:53
Application of RNAi and Heat-shock-induced Transcription Factor Expression to Reprogram Germ Cells to Neurons in C. elegans
Published on: January 1, 2018
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Canalizing cell fate by transcriptional repression
Bryce Lim1,2,3, Katrin Domsch4, Moritz Mall5,6,7
1Cell Fate Engineering and Disease Modeling Group, German Cancer Research Center (DKFZ) and DKFZ-ZMBH Alliance, 69120, Heidelberg, Germany.
Molecular Systems Biology
|February 1, 2024
Summary
Sequence-specific transcription factors (TFs) maintain cell identity by repressing alternative cell fates. These TFs recruit repressive complexes to control gene expression and ensure developmental stability.
Area of Science:
- Cellular and Molecular Biology
- Developmental Biology
- Gene Regulation
Background:
- Cellular identity is vital for multicellular development, requiring precise gene expression control.
- While gene activation is well-studied, mechanisms of transcriptional repression in cell fate decisions remain less understood.
Purpose of the Study:
- To provide an overview of repressive mechanisms in cell fate regulation.
- To highlight the role of transcription factors (TFs) in suppressing alternative cell fates.
Main Methods:
- Review of existing literature on transcriptional repression and cell fate.
- Analysis of the molecular machinery involved in recruiting repressive complexes.
- Discussion of TF-mediated chromatin accessibility modulation.
Main Results:
- Sequence-specific TFs are crucial for suppressing alternative cell fates.
- TF depletion leads to increased cellular plasticity and unwanted gene expression.
- TFs recruit cell type-specific repressive complexes to cis-regulatory elements.
Conclusions:
- Repressive complexes modulated by TFs control chromatin accessibility to suppress alternative developmental programs.
- The dynamic nature of these complexes allows for stable maintenance of cell fates throughout development.
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