A LncRNA-MAF:MAFB transcription factor network regulates epidermal differentiation
Vanessa Lopez-Pajares1, Kun Qu1, Jiajing Zhang1
1Program in Epithelial Biology, Stanford University, Stanford, CA 94305, USA.
Developmental Cell
|March 26, 2015
Summary
Transcription factors MAF and MAFB are crucial for epidermal progenitor differentiation. They regulate genes and are controlled by lncRNAs ANCR and TINCR, forming a key differentiation network.
Area of Science:
- Molecular Biology
- Genomics
- Developmental Biology
Background:
- Progenitor differentiation involves complex genomic expression changes.
- The specific genes and transcription factors (TFs) governing epidermal differentiation remain incompletely understood.
Purpose of the Study:
- To identify key transcription factors and regulatory networks controlling epidermal progenitor differentiation.
- To elucidate the roles of specific TFs and lncRNAs in epidermal regeneration.
Main Methods:
- Kinetic transcriptome analysis during epidermal regeneration.
- Module mapping of 1,046 transcription factors.
- ChIP-seq analysis to identify TF binding sites.
- Integrative analysis of lncRNAs and TFs.
Main Results:
- Identified distinct gene sets for progenitor, early, and late differentiation stages.
- MAF and MAFB were identified as necessary and sufficient TFs for progenitor differentiation.
- MAF:MAFB regulates 393 genes, with ANCR and TINCR lncRNAs acting as upstream regulators.
- MAF:MAFB directly binds to and regulates key epidermal TFs (GRHL3, ZNF750, KLF4, PRDM1), which act downstream.
Conclusions:
- A lncRNA-TF regulatory network, orchestrated by MAF:MAFB, is essential for epidermal progenitor differentiation.
- MAF:MAFB controls downstream TFs, establishing a hierarchical regulatory cascade.
- This study defines a novel regulatory mechanism critical for epidermal development and regeneration.
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