Nr2f-dependent allocation of ventricular cardiomyocyte and pharyngeal muscle progenitors
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View abstract on PubMed
Summary
This summary is machine-generated.Retinoic acid signaling regulates progenitor cell fate decisions. Nr2f1a and Nr2f2 transcription factors restrict cardiac muscle development and promote pharyngeal muscle formation, impacting congenital heart and craniofacial defects.
Area Of Science
- Developmental biology
- Molecular genetics
- Cardiovascular research
Background
- Congenital syndromes often present with shared cardiac and craniofacial muscle defects.
- The precise mechanisms governing the antagonistic lineage decisions between cardiac and pharyngeal muscle progenitors remain unclear.
- Understanding these mechanisms is crucial for deciphering developmental syndromes and congenital heart defects.
Purpose Of The Study
- To elucidate the molecular mechanisms controlling lineage allocation between cardiac and pharyngeal muscle progenitors.
- To investigate the role of retinoic acid signaling and Nr2f transcription factors in this process.
- To provide insights into the etiology of developmental syndromes affecting the heart and face.
Main Methods
- Utilized zebrafish (Danio rerio) as a model organism.
- Generated and analyzed nr2f1a and nr2f2 mutant zebrafish lines.
- Employed Cre-mediated genetic lineage tracing to track progenitor cell fate.
- Investigated the role of retinoic acid (RA) signaling pathways.
Main Results
- Identified retinoic acid (RA) signaling as a direct promoter of Nr2f1a expression in the anterior lateral plate mesoderm.
- Demonstrated redundant roles for Nr2f1a and Nr2f2 in restricting ventricular cardiomyocyte (CM) number and promoting posterior pharyngeal muscle (PM) development.
- Showed that in nr2f1a; nr2f2 double mutants, tcf21+ progenitors preferentially differentiate into ventricular CMs over posterior PMs.
Conclusions
- Nr2f1a and Nr2f2 are key regulators of antagonistic lineage choices between cardiac and pharyngeal muscle progenitors.
- RA signaling, through Nr2f1a, plays a critical role in directing progenitor cell fate.
- These findings offer molecular insights into developmental syndromes with heart and craniofacial defects and the variability of congenital heart defects linked to NR2F mutations.
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