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Updated: Jul 14, 2026

In vitro Organoid Culture of Primary Mouse Colon Tumors
Published on: May 17, 2013
Beclin 1 gene inhibits tumor growth in colon cancer cell lines
Kenji Koneri1, Takanori Goi, Yasuo Hirono
1Department of Gastroenterological Surgery, Faculty of Medicine, University of Fukui, Yoshida-gun, Fukui 910-1193, Japan.
Background:
The Beclin 1 gene binds to the apoptosis-inhibiting protein Bcl-2. The expression and function of the Beclin 1 gene in four colorectal cancer cell lines (HT29, DLD-1, SW480, SW620) was investigated.
Materials And Methods:
The expression of Beclin 1 mRNA was examined by reverse transcription-polymerase chain reaction (RT-PCR), the cell growth rate of a stable cell line established after transfection of the Beclin 1 gene into low Beclin 1-expressing HT29 colon cancer cells. In addition, changes in cell cycle were investigated by flow cytometry, and the expression levels of cell cycle related proteins in the Beclin 1 transfected colon cancer cell line were assessed.
Results:
The expression level of Beclin 1 mRNA in the colon cancer cell lines was variable. Transfection of the low Beclin 1 gene-expressing colon cancer cell line with the Beclin 1 gene resulted in cell growth inhibition. The cell cycle analysis showed that the percentage of GJ-phase cells was significantly higher in Beclin 1 transfectants than in mock transfected cells. The expression levels of cyclin E and phosphorylated Rb were decreased.
Conclusion:
These results indicate that Beclin 1 can inhibit the growth of colorectal cancer cells.
Insights
Beclin 1 gene expression varies in colorectal cancer cells. Introducing Beclin 1 into cancer cells inhibits their growth and alters cell cycle progression, suggesting a role in cancer therapy.
Area of Science:
- Molecular biology
- Cancer research
- Cell biology
Background:
- Beclin 1 gene interacts with Bcl-2, an apoptosis inhibitor.
- Investigated Beclin 1 expression and function in colorectal cancer cell lines.
Purpose of the Study:
- To examine Beclin 1 gene expression and function in colorectal cancer.
- To determine the effect of Beclin 1 on cancer cell growth and cell cycle.
Main Methods:
- Reverse transcription-polymerase chain reaction (RT-PCR) for mRNA expression.
- Cell transfection and growth rate assessment.
- Flow cytometry for cell cycle analysis and protein expression.
Main Results:
- Variable Beclin 1 mRNA expression observed across cell lines.
- Beclin 1 gene transfection inhibited colon cancer cell growth.
- Increased G1-phase cells and decreased cyclin E and phosphorylated Rb in transfectants.
Conclusions:
- Beclin 1 demonstrates potential as a growth inhibitor for colorectal cancer cells.
- Modulating Beclin 1 may offer a therapeutic strategy for colorectal cancer.
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