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Updated: Nov 4, 2025

Generation of Integration-free Human Induced Pluripotent Stem Cells Using Hair-derived Keratinocytes
Published on: August 20, 2015
Reprogramming oral epithelial keratinocytes into a pluripotent phenotype for tissue regeneration.
Fayrouz Bazina1,2, Sabine M Brouxhon3, Stephanos Kyrkanides4
1Ph.D. Program in Oral Biology and Pathology, School of Dental Medicine, Stony Brook University, Stony Brook, New York, USA.
Researchers reprogrammed adult oral keratinocytes into pluripotent stem cells using TGF-β1. This breakthrough offers a potential source for regenerative dentistry applications.
Area of Science:
- Stem Cell Biology
- Regenerative Medicine
- Oral Biology
Background:
- Adult somatic cells are typically difficult to reprogram into pluripotent states.
- Regenerative dentistry requires a consistent supply of pluripotent stem cells.
- Oral epithelial keratinocytes present a potential source for cell reprogramming.
Purpose of the Study:
- To reprogram adult somatic oral epithelial keratinocytes into pluripotent cells.
- To investigate the potential of these reprogrammed cells for regenerative dentistry.
Main Methods:
- Utilized an immortalized murine oral keratinocyte cell (IMOK) line.
- Administered chronic transforming growth factor-beta 1 (TGF-β1) treatment in vitro.
- Assessed the expression of pluripotency markers (Oct4, Nanog, Sox2, Nestin) and related genes.
- Investigated the role of TGF-β1 receptor signaling using SB431542.
Main Results:
- TGF-β1 treatment induced the expression of key stem cell factors (Oct4, Nanog, Sox2, Nestin) in oral keratinocytes.
- The TGF-β1-induced pluripotency was dependent on TGF-β1 receptor signaling, as shown by inhibition with SB431542.
- Oral epithelial keratinocytes acquired phenotypic characteristics of pluripotent stem cells.
Conclusions:
- Adult oral epithelial keratinocytes can be reprogrammed into pluripotent stem cells.
- Chronic TGF-β1 treatment facilitates this reprogramming process.
- This method offers a facile approach to generating an unlimited supply of pluripotent stem cells for regenerative dentistry.
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