Related Experiment Video
Updated: Jun 15, 2026
Discovery of Driver Genes in Colorectal HT29-derived Cancer Stem-Like Tumorspheres
Published on: July 22, 2020
Study of 5HT3 and HT4 receptor expression in HT29 cell line and human colon adenocarcinoma tissues
Ramin Ataee1, Soheila Ajdary, Mehdi Rezayat
1Department of Pharmacology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran.
Background:
Serotonin (5HT) has been shown to be a mitogenic factor in several carcinomas. Its mitogenic effect is elicited through a wide range of 5HT receptor subtypes. In this study, the effects of 5HT, 5HT3 (1-phenylbiguanide hydrochloride) and 5HT4 (cisapride) agonists in promoting the growth of the HT29 cell line and the growth-inhibition effect of the 5HT3 receptor antagonist (Y-25130 hydrochloride) and 5HT4 receptor antagonist (RS 23597-190) were investigated. The expressions of 5HT3 and 5HT4 receptors in human colon cancer tissues and the HT29 cell line were studied.
Methods:
The growth-promoting and growth-inhibition effects of 5-HT, 5HT3 and 5HT4 agonists and antagonists on the HT29 cell line were studied using MTT assay. Receptor expression has been demonstrated by western blotting.
Results:
The results showed that 5HT, 5HT3, and 5HT4 agonists caused significant proliferation of HT29 cells. 5HT3 and 5HT4 receptor antagonists had an inhibitory effect on the growth of these cells. Western blot analysis gave bands from colon tissue extracts and the HT29 cell line.
Conclusion:
The results indicate which 5HT3 and 5HT4 receptors are significantly expressed in both colon cancer tissue and the HT29 cell line. Expression for the 5HT3 receptor is more potent. Furthermore, 5HT plays a mitogenic role in colon cancer cells and antagonists of 5HT3, and 5HT4 receptors can inhibit cancer cell growth.
Insights
Serotonin (5HT) promotes colon cancer cell growth via 5HT3 and 5HT4 receptors. Blocking these serotonin receptors inhibits cancer cell proliferation, suggesting therapeutic potential.
Area of Science:
- Oncology
- Molecular Biology
- Pharmacology
Background:
- Serotonin (5HT) acts as a mitogenic factor in various carcinomas.
- Its effects are mediated through diverse 5HT receptor subtypes.
- This study investigates the role of 5HT3 and 5HT4 receptors in colon cancer.
Purpose of the Study:
- To investigate the effects of 5HT, 5HT3 and 5HT4 agonists on HT29 colon cancer cell line proliferation.
- To evaluate the growth-inhibitory effects of 5HT3 and 5HT4 receptor antagonists.
- To determine the expression of 5HT3 and 5HT4 receptors in colon cancer tissues and cell lines.
Main Methods:
- MTT assay was used to assess cell proliferation and growth inhibition.
- Western blotting was employed to detect receptor expression.
- Experiments utilized 5HT, specific agonists (1-phenylbiguanide hydrochloride for 5HT3, cisapride for 5HT4), and antagonists (Y-25130 hydrochloride for 5HT3, RS 23597-190 for 5HT4).
Main Results:
- 5HT, 5HT3, and 5HT4 agonists significantly increased HT29 cell proliferation.
- 5HT3 and 5HT4 receptor antagonists demonstrated a notable inhibitory effect on cancer cell growth.
- Western blot analysis confirmed the presence of 5HT3 and 5HT4 receptors in both colon cancer tissue and the HT29 cell line.
Conclusions:
- 5HT3 and 5HT4 receptors are significantly expressed in colon cancer, with 5HT3 showing more potent expression.
- Serotonin plays a mitogenic role in colon cancer cell growth.
- Antagonists targeting 5HT3 and 5HT4 receptors can effectively inhibit colon cancer cell proliferation, indicating potential therapeutic strategies.
