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[An experimental study of anticancer agent sensitivity test in human gastric cancer cell lines by flow cytometry]
1First Department of Surgery, Niigata University School of Medicine, Japan.
Abstract:
The purpose of this study is to assess the lethal and kinetic effects of CDDP, ADM, MMC and 5FU on human gastric cancer cell lines, MKN28, MKN45 and KATO III. The lethal effect was examined by growth inhibition test and colony forming test. The DNA content and DNA synthesis rate of individual cells were simultaneously measured by DNA/BrdU double staining method. In growth inhibition test, MKN45 was sensitive to CDDP, and all cell lines were sensitive to ADM, MMC and 5FU. On the other hand, in colony forming test, these cell lines were sensitive to all drugs. In the cell kinetics, CDDP, ADM and MMC yielded a significant increase of G2 phase fraction at 24, 48 and 72 hours, and caused a significant decrease of BrdU labeling index at 48 hours. The changes of G2 phase fraction and BrdU labeling index were correlated well to the lethal effect of CDDP, ADM and MMC. However, 5FU did not cause these changes to the cell lines employed in the cell kinetic study. Therefore, it was suggested that these results of the cell kinetics might be applied to anticancer agent sensitivity test by selecting adequate anticancer drugs.
Insights
This study evaluated chemotherapy drugs, including cisplatin (CDDP), Adriamycin (ADM), mitomycin C (MMC), and 5-fluorouracil (5FU), against gastric cancer cells. Cell cycle changes and DNA synthesis inhibition correlated with the lethal effects of CDDP, ADM, and MMC.
Area of Science:
- Oncology
- Molecular Biology
- Cell Biology
Context:
- Gastric cancer remains a significant global health challenge.
- Developing effective chemotherapy regimens is crucial for improving patient outcomes.
- Understanding drug-induced cellular responses is key to optimizing cancer treatment.
Purpose:
- To investigate the cytotoxic and cell kinetic effects of cisplatin (CDDP), Adriamycin (ADM), mitomycin C (MMC), and 5-fluorouracil (5FU) on human gastric cancer cell lines (MKN28, MKN45, KATO III).
- To correlate changes in cell cycle distribution and DNA synthesis with drug-induced lethality.
Summary:
- Growth inhibition and colony formation assays revealed varying sensitivities of gastric cancer cell lines to CDDP, ADM, MMC, and 5FU.
- CDDP, ADM, and MMC induced significant G2 phase arrest and reduced DNA synthesis, correlating with their lethal effects.
- 5-Fluorouracil (5FU) did not elicit comparable cell kinetic alterations, suggesting a different mechanism of action or lower efficacy in this context.
Impact:
- The findings suggest that cell kinetic parameters, specifically G2 phase fraction and BrdU labeling index, can serve as predictive markers for anticancer drug sensitivity.
- This research provides a basis for developing more personalized and effective chemotherapy strategies for gastric cancer by selecting drugs based on predicted cellular response.