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Tumor cell growth suppression by tannic acid
H Kamei1, T Koide, Y Hashimoto
1Department of Surgery, Aichi-Gakuin University Hospital, Nagoya, Japan. kamei@dpc.aichi-gakuin.ac.jp
Abstract:
Tannic acid was cultured together with tumor cells that had originated from human malignant tumors (HCT-15 & AGS). Significant suppression of tumor growth was observed. The 50% suppression was observed at the concentration between 50 micrograms/ml and 12.5 micrograms/ml. When tannic acid was injected into HCT-15 cells by electroporation at 1180 mu p and 200 ohm, the suppression rate was 34.3% at the concentration of 50 micrograms/ml in HBS solution. The suppression rate of cells only in contact with tannic acid solution for one hour under the same conditions as used for electroporation, was 26.1%. Histographic findings suggested that tannic acid almost completely blocked the S phase of the cell cycle.
Insights
Tannic acid demonstrated significant tumor growth suppression in human malignant tumor cells (HCT-15 & AGS). This natural compound also effectively blocked the S phase of the cell cycle, indicating potential anti-cancer properties.
Area of Science:
- Oncology
- Cell Biology
- Natural Product Chemistry
Background:
- Malignant tumors pose a significant global health challenge, necessitating novel therapeutic strategies.
- Natural compounds are increasingly investigated for their potential anti-cancer activities.
- Tannic acid, a plant-derived polyphenol, has shown various biological effects, including antioxidant and anti-inflammatory properties.
Purpose of the Study:
- To investigate the anti-proliferative effects of tannic acid on human malignant tumor cell lines.
- To determine the efficacy of tannic acid in suppressing tumor cell growth in vitro.
- To elucidate the mechanism of action of tannic acid on the cell cycle.
Main Methods:
- Human malignant tumor cell lines (HCT-15 and AGS) were cultured with varying concentrations of tannic acid.
- Electroporation was used to deliver tannic acid into HCT-15 cells.
- Cell cycle progression was analyzed using histographic methods.
Main Results:
- Tannic acid significantly suppressed the growth of HCT-15 and AGS tumor cells.
- A 50% growth suppression was observed at tannic acid concentrations between 12.5 and 50 micrograms/ml.
- Electroporation enhanced tannic acid's suppressive effect, with a 34.3% suppression rate at 50 micrograms/ml.
- Tannic acid treatment resulted in a near-complete blockade of the S phase in the cell cycle.
Conclusions:
- Tannic acid exhibits potent in vitro anti-tumor activity against human malignant tumor cells.
- The anti-proliferative effect of tannic acid is associated with cell cycle arrest, specifically at the S phase.
- Tannic acid represents a promising natural compound for further investigation as a potential anti-cancer therapeutic agent.
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