Role of phenolic compounds in nitric oxide synthase activity in colon and breast adenocarcinoma
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Updated: Jun 8, 2026

Transfer of Manipulated Tumor-associated Neutrophils into Tumor-Bearing Mice to Study their Angiogenic Potential In Vivo
Published on: July 20, 2019
Didem Turgut Cosan1, Banu Bayram, Ahu Soyocak
1Department of Medical Biology, Medical Faculty, Eskişehir Osmangazi University, Eskişehir, Turkey. dcosan@gmail.com
Abstract:
Cancer chemopreventive agents are designed to reduce the incidence of tumorigenesis by intervening at one or more stages of carcinogenesis. This study aimed to determine the effects of resveratrol (RES) and tannic acid (TA), which are chemopreventive agents, on the nitric oxide synthase (NOS) levels that are effective for development of cancer in colon and breast cancer cell lines. The CaCo-2 (human colon carcinoma cell line) and MCF-7 (Michigan Cancer Foundation-7; human breast adenocarcinoma cell line) cells were grown in the laboratory. RES and TA were used to treat CaCo-2 and MCF-7 cells. Nitric Oxide Synthase Assay Kit was used to determine the NOS enzyme activity of CaCo-2 and MCF-7. Statistical differences between control and RES- and TA-treated cells were calculated using the Student's t-test for double comparison. It was observed that NO activity was generally decreased in CaCo-2 and MCF-7 cells, in which RES and TA were applied. Results suggest that the phenolic compounds RES and TA have different effects on NOS enzyme activity of the colon and breast cancer cells.
Insights
Resveratrol (RES) and tannic acid (TA) show potential as cancer chemopreventive agents by decreasing nitric oxide synthase (NOS) activity in colon and breast cancer cells.
Area of Science:
- Oncology
- Biochemistry
- Molecular Biology
Background:
- Cancer chemoprevention strategies aim to inhibit tumorigenesis.
- Nitric oxide synthase (NOS) plays a role in cancer development.
- Resveratrol (RES) and tannic acid (TA) are studied for their chemopreventive properties.
Purpose of the Study:
- To investigate the effects of RES and TA on NOS levels.
- To determine the impact of these agents on colon and breast cancer cell lines.
Main Methods:
- Utilized CaCo-2 (colon) and MCF-7 (breast) cancer cell lines.
- Treated cells with RES and TA.
- Measured nitric oxide synthase (NOS) enzyme activity using a specific assay kit.
- Analyzed data using Student's t-test.
Main Results:
- A general decrease in nitric oxide (NO) activity was observed in both CaCo-2 and MCF-7 cells treated with RES and TA.
- RES and TA demonstrated varying effects on NOS enzyme activity across the different cancer cell types.
Conclusions:
- The phenolic compounds RES and TA may modulate NOS activity in cancer cells.
- These findings suggest a potential role for RES and TA in colon and breast cancer chemoprevention through their influence on NOS.
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