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Distinct SOX9 levels differentially mark stem/progenitor populations and enteroendocrine cells of the small intestine epithelium

Open access
Formeister, Eric J., Sionas, Ayn L., Lorance, David K., Barkley, Carey L., Lee, Ginny H., Magness, Scott T.·2009·American Journal of Physiology-Gastrointestinal and Liver Physiology

Abstract

SOX transcription factors have the capacity to modulate stem/progenitor cell proliferation and differentiation in a dose-dependent manner. SOX9 is expressed in the small intestine epithelial stem cell zone. Therefore, we hypothesized that differential levels of SOX9 may exist, influencing proliferation and/or differentiation of the small intestine epithelium. Sox9 expression levels in the small intestine were investigated using a Sox9 enhanced green fluorescent protein ( Sox9 EGFP) transgenic mouse. Sox9 EGFP levels correlate with endogenous SOX9 levels, which are expressed at two steady-state levels, termed Sox9 EGFPLO and Sox9 EGFPHI. Crypt-based columnar cells are Sox9 EGFPLO and demonstrate enriched expression of the stem cell marker, Lgr5. Sox9 EGFPHI cells express chromogranin A and substance P but do not express Ki67 and neurogenin3, indicating that Sox9 EGFPHI cells are postmitotic enteroendocrine cells. Overexpression of SOX9 in a crypt cell line stopped proliferation and induced morphological changes. These data support a bimodal role for SOX9 in the intestinal epithelium, where low SOX9 expression supports proliferative capacity, and high SOX9 expression suppresses proliferation.

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Metadata

Authors
Formeister, E. J., Sionas, A. L., Lorance, D. K., Barkley, C. L., Lee, G. H., & Magness, S. T.
Venue
American Journal of Physiology-Gastrointestinal and Liver Physiology
Published
2009-05
Volume
296
Issue
5
Pages
G1108-G1118
ISSN
  • 0193-1857 (ISSN-L)
  • 1522-1547
OpenAlex
W2171560127
Cited by
232
References
2
FWCI
6.06
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Distinct SOX9 levels differentially mark stem/progenitor populations and enteroendocrine cells of the small intestine epithelium. https://app.cochat.ai/papers/10.1152/ajpgi.00004.2009
The paper
Formeister, E. J., Sionas, A. L., Lorance, D. K., Barkley, C. L., Lee, G. H., & Magness, S. T. (2009). Distinct SOX9 levels differentially mark stem/progenitor populations and enteroendocrine cells of the small intestine epithelium. American Journal of Physiology-Gastrointestinal and Liver Physiology. https://doi.org/10.1152/ajpgi.00004.2009

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