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Updated: Mar 6, 2026

In vitro Organoid Culture of Primary Mouse Colon Tumors
Published on: May 17, 2013
Exendin-4 does not modify growth or apoptosis of human colon cancer cells
He Wenjing1,2, Yu Shuang1, Li Weisong3
1a Department of Endocrinology , The First Affiliated Hospital of Sun Yat-sen University , Guangzhou , China.
Aim:
Glucagon-like peptide-1 (GLP-1) receptor agonists are a kind of very popular antidiabetes drugs. They promote cell proliferation and survival through activation of signaling pathways in human islet cells involving phosphate idylinositol 3 kinase (PI3K) and extracellular regulated kinases 1 and 2 (ERK1/2), which are frequently activated in human colon cancer cells. Then, it is possible that taking GLP-1 receptor (GLP-1R) agonists persistently would induce proliferation of β cells as well as colon cancer cells. So, clarifying the effects and mechanisms of GLP-1R agonists on colon cancer cells has important clinical implications.
Materials And Methods:
We investigated GLP-1R expression in human colon cancer tissue samples with immunohistochemisty analysis and explored the effects of exendin-4, a GLP-1 receptor agonist, on colon cancer cells in vitro and in vivo.
Results:
The results showed lack of GLP-1R expression in both human colon cancer tissues and colon cancer cell lines. Exendin-4 did not enhance the proliferation and migration of colon cancer cell lines in vitro, and nor did it inhibit apoptosis induced by cytotoxic agents such as 5-fluorouracil (5-FU) or irinotecan. In addition, exendin-4 did not promote the propagation of colon cancer cells in vivo.
Conclusion:
Our study suggests that GLP-1R agonists do not modify the growth or survival of human colon cancer cells and may be safe for diabetic patients with colon cancer.
Insights
Glucagon-like peptide-1 (GLP-1) receptor agonists do not affect colon cancer cell growth or survival. These findings suggest GLP-1 receptor agonists may be safe for diabetic patients with colon cancer.
Area of Science:
- Oncology
- Endocrinology
- Pharmacology
Background:
- Glucagon-like peptide-1 (GLP-1) receptor agonists are widely used antidiabetes medications.
- These drugs activate signaling pathways (PI3K, ERK1/2) that can also promote cancer cell growth.
- The potential impact of GLP-1 receptor agonists on colon cancer warrants investigation due to these shared pathways.
Purpose of the Study:
- To determine if GLP-1 receptor agonists influence the growth and survival of human colon cancer cells.
- To investigate the expression of the GLP-1 receptor in colon cancer tissues and cell lines.
Main Methods:
- Immunohistochemistry was used to assess GLP-1 receptor expression in human colon cancer samples.
- Exendin-4, a GLP-1 receptor agonist, was tested on colon cancer cell lines in vitro for effects on proliferation, migration, and apoptosis.
- The in vivo effects of exendin-4 on colon cancer cell propagation were evaluated.
Main Results:
- No expression of the GLP-1 receptor was detected in human colon cancer tissues or cell lines.
- Exendin-4 did not enhance the proliferation or migration of colon cancer cells in vitro.
- Exendin-4 did not protect colon cancer cells from apoptosis induced by chemotherapy agents (5-FU, irinotecan) and did not promote tumor growth in vivo.
Conclusions:
- GLP-1 receptor agonists do not appear to influence the growth or survival of human colon cancer cells.
- These findings suggest that GLP-1 receptor agonists could be safely used in diabetic patients diagnosed with colon cancer.
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