Rheostats, not switches: Nuclear receptor dosage tunes somatic-to-iPSC reprogramming
1Department of Biochemistry and Molecular Genetics, University of Illinois Chicago, MBRB 2370, 900 S Ashland Av, Chicago, IL 60607, USA.
Stem Cell Reports
|April 3, 2026
Summary
Rora
Area of Science:
- Molecular Biology
- Stem Cell Research
- Epigenetics
Background:
- Nuclear receptors are key regulators of gene expression.
- Ligand binding, chromatin state, and receptor levels influence transcription factor activity.
- Cell fate conversion requires precise control of gene regulatory networks.
Purpose of the Study:
- To investigate the role of Rora in OKS-mediated induced pluripotent stem cell (iPSC) generation.
- To determine the impact of Rora expression levels on reprogramming efficiency.
- To elucidate the connection between Rora dosage and signaling pathways involved in cell fate changes.
Main Methods:
- Utilized quantitative analysis of Rora expression during OKS-mediated reprogramming.
- Assessed iPSC formation efficiency across a range of Rora expression levels.
- Analyzed downstream effects on immune and WNT signaling pathways.
Main Results:
- Rora exhibits a dose-dependent effect on reprogramming.
- Moderate Rora expression significantly enhances iPSC formation.
- High Rora levels inhibit the reprogramming process, impacting immune and WNT signaling.
Conclusions:
- Quantitative control of Rora is critical for efficient cell fate conversion.
- Rora's dual role highlights its importance in balancing pluripotency induction with cellular signaling.
- Findings provide insights into optimizing reprogramming strategies for regenerative medicine.
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