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Updated: May 28, 2026
07:33
A Novel Culture Model for Human Pluripotent Stem Cell Propagation on Gelatin in Placenta-conditioned Media
Published on: August 3, 2015
TGF-β and stem cell factor regulate cell proliferation in the proximal stem cell niche
Sarah Salm1, Patricia E Burger, Elaine Lynette Wilson
1Department of Cell Biology, New York University School of Medicine, New York, New York 10016, USA.
The Prostate
|October 26, 2011
Summary
Stem cell factor (SCF) promotes prostate stem cell proliferation, while transforming growth factor beta (TGF-β) inhibits it. Their opposing actions regulate prostate stem cell niche dynamics.
Area of Science:
- Stem cell biology
- Prostate cancer research
- Cell signaling pathways
Background:
- Stem cells reside in specialized microenvironments called niches that control their behavior.
- Murine prostate stem cells are found in the proximal ductal region.
- Cytokines like TGF-β and SCF are key regulators within stem cell niches.
Purpose of the Study:
- To investigate the role of TGF-β and SCF in regulating murine prostate stem cells.
- To understand how these factors influence cell proliferation and differentiation within the stem cell niche.
Main Methods:
- Murine prostate cells from proximal and distal regions were cultured with or without TGF-β and SCF.
- Cell growth was assessed on collagen-coated surfaces and within collagen gels.
- Prostatic duct formation, size, complexity, and cell phenotype were analyzed using immunohistochemistry.
Main Results:
- Endogenous TGF-β inhibited proliferation and promoted differentiation towards a luminal phenotype in proximal cells.
- TGF-β also reduced duct formation capacity, favoring a luminal phenotype in prostatic ducts.
- SCF addition enhanced proximal cell proliferation and duct formation; removing TGF-β further boosted proliferation.
Conclusions:
- SCF and endogenous TGF-β exert opposing effects on prostate stem cell proliferation and differentiation.
- These factors play a crucial role in regulating the basal/luminal cell composition within the prostate stem cell niche.
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