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Updated: Jul 17, 2026
07:33
In vitro Organoid Culture of Primary Mouse Colon Tumors
Published on: May 17, 2013
Short-chain fatty acids induce cell cycle inhibitors in colonocytes
1Department of Pathology, State University of New York Health Science Center-Syracuse, Syracuse, New York 13210, USA.
Gastroenterology
|May 30, 1998
Summary
Short-chain fatty acids (SCFAs) from wheat bran fiber effectively inhibit colon cancer cell growth by inducing cell cycle inhibitors. This effect is not mediated by TGF-beta1, highlighting SCFAs as key protective compounds.
Area of Science:
- Gastroenterology
- Oncology
- Molecular Biology
Background:
- Dietary fibers like pectin, wheat bran, and oat bran yield short-chain organic acids (SCFAs) in the colon.
- SCFAs are hypothesized to protect against colon cancer by inducing transforming growth factor (TGF)-beta1, which inhibits cell growth via cyclin-directed kinase (cdk) inhibitors.
Purpose of the Study:
- To investigate the role of SCFAs from dietary fibers in colon cancer prevention.
- To determine if SCFA-induced inhibition of colon cancer cell growth is mediated by TGF-beta1 and cdk inhibitors.
Main Methods:
- U4 human colon carcinoma cells were used to model normal colonocytes.
- Cells were treated with SCFA mixtures mimicking digestion products of wheat bran, oat bran, pectin, and cellulose.
- Immunoprecipitation and Western blotting assessed cdk/cyclin complex composition and kinase activity.
Main Results:
- SCFA mixtures rapidly and significantly induced cdk inhibitors (p21cip1 and p27kip1) more than TGF-beta1.
- Wheat bran-derived SCFA mixtures were most effective in inhibiting cell growth and inducing cdk inhibitors, followed by oat bran and pectin.
- Cellular response was independent of TGF-beta1 induction.
Conclusions:
- SCFA induction of cdk inhibitors is not mediated by TGF-beta1.
- Wheat bran fiber-derived SCFA mixtures demonstrate the highest efficacy in inhibiting colon cancer cell growth through cdk inhibitor induction.
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