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The Influences of RARγ on the Behavior of Normal and Cancer Stem Cells
1Department of Biomedical Sciences, College of Medicine and Health, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK.
International Journal of Molecular Sciences
|February 13, 2026
Summary
Retinoic acid receptor gamma (RARγ) is crucial for stem cell behavior and organ development. Its dysregulation contributes to various cancers, highlighting its potential as a therapeutic target.
Area of Science:
- Developmental Biology
- Cancer Biology
- Stem Cell Biology
Background:
- Retinoic acid receptor gamma (RARγ) mRNA expression is spatially and temporally regulated during mouse embryogenesis.
- RARγ is predominantly found in stem and progenitor cells, suggesting a role in organ formation.
Purpose of the Study:
- To investigate the multifaceted roles of RARγ in stem cell maintenance, pluripotency, and cancer development.
- To elucidate the signaling pathways regulated by RARγ.
Main Methods:
- Analysis of RARγ mRNA expression during embryogenesis.
- Studies on RARγ agonism and antagonism in hematopoietic stem cells, zebrafish development, and chondrogenesis.
- Investigation of RARγ's role in induced pluripotent stem cell generation.
- Assessment of RARγ's oncogenic potential in various cancer types.
- Examination of RARγ's interaction with Wnt/β-catenin, Notch, and TGFβ/Smad3 signaling pathways.
Main Results:
- RARγ agonism maintains hematopoietic stem cells but blocks their development.
- RARγ expression enhances induced pluripotent stem cell generation.
- RARγ is oncogenic in multiple cancers, promoting cancer cell proliferation.
- Antagonism or inhibition of RARγ or all-trans retinoic acid synthesis leads to cancer cell death, including cancer stem cells.
- RARγ regulates Wnt/β-catenin and Notch signaling and acts as a co-factor for Smad3.
Conclusions:
- RARγ plays a critical role in controlling stem and progenitor cell behavior.
- RARγ is implicated in both normal development and oncogenesis.
- Targeting RARγ pathways offers potential therapeutic strategies for cancer treatment.
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