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Isolation and Enrichment of Human Lung Epithelial Progenitor Cells for Organoid Culture
Published on: July 21, 2020
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β-Catenin maintains lung epithelial progenitors after lung specification
Edwin J Ostrin1,2, Danielle R Little3, Kamryn N Gerner-Mauro1
1Department of Pulmonary Medicine, the University of Texas MD Anderson Cancer Center, Houston, Texas 77030, USA.
Development (Cambridge, England)
|February 15, 2018
Summary
Beta-catenin (CTNNB1) is crucial for maintaining lung progenitors by regulating key genes and suppressing gastrointestinal development. This finding clarifies progenitor maintenance mechanisms in lung development.
Area of Science:
- Developmental Biology
- Cell Biology
- Molecular Biology
Background:
- Lung epithelium development relies on SRY box 9 (SOX9)-expressing progenitors.
- Mechanisms maintaining these lung progenitors post-specification are not fully understood.
Purpose of the Study:
- To investigate the role of beta-catenin (CTNNB1) in maintaining lung epithelial progenitors.
- To elucidate how CTNNB1 regulates progenitor gene expression and differentiation.
Main Methods:
- Utilized inducible, progenitor-specific genetic mosaic mouse models.
- Performed in silico screening and TRAP-RNAseq to identify progenitor gene signatures.
- Analyzed gene expression and protein interactions through genetic epistasis.
Main Results:
- Beta-catenin (CTNNB1) maintains lung progenitors by promoting progenitor genes and suppressing gastrointestinal genes.
- CTNNB1 regulates NK2 homeobox 1 (NKX2.1) and SRY box 2 (SOX2) expression in a stage-dependent manner.
- CTNNB1 is essential for fibroblast growth factor (FGF)/Kirsten rat sarcoma viral oncogene homolog (KRAS)-mediated progenitor promotion.
Conclusions:
- Beta-catenin (CTNNB1) plays a critical role in maintaining lung progenitor identity and function.
- Wnt signaling, via CTNNB1, is vital for lung progenitor gene expression and suppressing alternative cell fates.
- Findings provide insights into the molecular regulation of lung development and progenitor maintenance.
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