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Updated: Aug 26, 2025

Isolation of Mouse Salivary Gland Stem Cells
Published on: February 8, 2011
IFT140+/K14+ cells function as stem/progenitor cells in salivary glands
Xueming Zhang1, Ji Zhou2, Xinyu Wang2
1Department of Oral and Maxillofacial Surgery, Stomatological Hospital and Dental School of Tongji University, Shanghai Engineering Research Center of Tooth Restoration and Regeneration, No. 399, YanChang Middle Road, Shanghai, China.
Researchers identified IFT140+/K14+ as a novel marker for salivary gland stem cells. This finding is crucial for understanding salivary gland development and regeneration after injury.
Area of Science:
- Cell Biology
- Developmental Biology
- Regenerative Medicine
Background:
- Salivary gland stem/progenitor cells are vital for gland development, maintenance, and repair.
- Keratin-14 positive (K14+) cells are recognized salivary stem cells, but K14 is also in differentiated cells, necessitating better markers.
- Intraflagellar transport (IFT) protein IFT140 is involved in signaling and stem cell function.
Purpose of the Study:
- To identify more accurate molecular markers for salivary gland stem/progenitor cells.
- To investigate the role of IFT140 in salivary gland stem/progenitor cell function and regeneration.
Main Methods:
- Immunohistochemical analysis of IFT140 expression in murine submandibular glands during development and regeneration.
- Assessment of self-renewal and differentiation potential of IFT140+/K14+ cells in vivo.
- Conditional deletion of Ift140 in K14+ cells to evaluate its role in development and regeneration.
Main Results:
- IFT140 was highly expressed in K14+ stem/progenitor cells during development and early regeneration.
- IFT140+/K14+ cells demonstrated self-renewal and differentiation into granular duct cells.
- Deletion of Ift140 impaired salivary gland development, epithelial function, and regeneration.
- IFT140 modulates ciliary membrane trafficking, influencing stem/progenitor cell function.
Conclusions:
- IFT140+/K14+ serves as a reliable marker for salivary gland stem/progenitor cells.
- IFT140 and primary cilia are essential for regulating salivary stem/progenitor cell differentiation and gland regeneration.
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