Journal article
Lef-1 controls cell cycle progression in airway basal cells to regulate proliferation and differentiation
Stem cells (Dayton, Ohio), Vol.39(9), pp.1221-1235
09/01/2021
DOI: 10.1002/stem.3386
PMCID: PMC8785221
PMID: 33932322
Abstract
The mammalian airways are lined by a continuous epithelial layer that is maintained by diverse populations of resident multipotent stem cells. These stem cells are responsible for replenishing the epithelium both at homeostasis and following injury, making them promising targets for stem cell and genetic-based therapies for a variety of respiratory diseases. However, the mechanisms that regulate when and how these stem cells proliferate, migrate, and differentiate remains incompletely understood. Here, we find that the high mobility group (HMG) domain transcription factor Lef-1 regulates proliferation and differentiation of mouse tracheal basal cells. We demonstrate that conditional deletion of Lef-1 stalls basal cell proliferation at the G1/S transition of the cell cycle, and that Lef-1 knockout cells are unable to maintain luminal tracheal cell types in long-term air-liquid interface culture. RNA sequencing analysis revealed that Lef-1 knockout (Lef-1KO) results in downregulation of key DNA damage response and cell cycle progression genes, including the kinase Chek1. Furthermore, chemical inhibition of Chek1 is sufficient to stall basal cell self-renewal in a similar fashion as Lef-1 deletion. Notably, the cell cycle block imposed by Lef-1KO in vitro is transient and basal cells eventually compensate to proliferate normally in a Chek1-independent manner. Finally, Lef-1KO cells were unable to fully regenerate tracheal epithelium following injury in vivo. These findings reveal that Lef-1 is essential for proper basal cell function. Thus, modulating Lef-1 function in airway basal cells may have applications in regenerative medicine.
Details
- Title: Subtitle
- Lef-1 controls cell cycle progression in airway basal cells to regulate proliferation and differentiation
- Creators
- Chandler W. Jensen-Cody - Roy J. and Lucille A. Carver College of MedicineAdrianne K. Crooke - Roy J. and Lucille A. Carver College of MedicinePavana G. Rotti - Roy J. and Lucille A. Carver College of MedicineVitaly Ievlev - Roy J. and Lucille A. Carver College of MedicineWeam Shahin - Roy J. and Lucille A. Carver College of MedicineSoo-Yeun Park - Roy J. and Lucille A. Carver College of MedicineThomas J. Lynch - Roy J. and Lucille A. Carver College of MedicineJohn F. Engelhardt - Roy J. and Lucille A. Carver College of Medicine
- Resource Type
- Journal article
- Publication Details
- Stem cells (Dayton, Ohio), Vol.39(9), pp.1221-1235
- DOI
- 10.1002/stem.3386
- PMID
- 33932322
- PMCID
- PMC8785221
- NLM abbreviation
- Stem Cells
- ISSN
- 1066-5099
- eISSN
- 1549-4918
- Publisher
- Wiley
- Number of pages
- 15
- Grant note
- HL152960 / National Heart, Lung, and Blood Institute; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Heart Lung & Blood Institute (NHLBI) DK047967; DK054759 / National Institute of Diabetes and Digestive and Kidney Diseases; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Institute of Diabetes & Digestive & Kidney Diseases (NIDDK) ENGELH20XX2 / Cystic Fibrosis Foundation Therapeutics; Italian Cystic Fibrosis Research Foundation
- Language
- English
- Date published
- 09/01/2021
- Academic Unit
- Roy J. Carver Department of Biomedical Engineering; Anatomy and Cell Biology; Radiation Oncology; Cardiothoracic Surgery; Internal Medicine
- Record Identifier
- 9984284327802771
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