• Biomedical Science Letters
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• v.12 no.4
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• pp.451-455
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• 2006

It is demonstrated that inorganic mercury has cytotoxic effect on glial cells. Recently, oxygen radicals is involved in methylmercuric chloride (MMC)-induced cytotoxicity. But, the toxic mechanism of MMC is left unknown. The purpose of this study was to examine the cytotoxicity of MMC on $C_6$ glioma cells. The cytotoxicy was measured by cell viability using XTT assay in $C_6$ glioma cells. Colorimetric assay is regarded as a very sensitive screening method for the determination of the cell viability on various agents. In this study, MMC decreased cell viability according to the dose- and time dependent manners after $C_6$ glioma cells were grown with various concentrations of MMC for 48 hours. In the protective effect of allopurinol on MMC-induced cytotoxicity, allopurinol was effective in the prevention of MMC-induced cytotoxicity in these cultures. These results suggest that MMC has highly cytotoxic effect on $C_6$ glioma cells by the decrease of cell viavility, and free radical scavenger such as allopurinol was effective on organic mercury-induced cytotoxicity in these cultures.

• Korean Journal of Pharmacognosy
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• v.26 no.4
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• pp.323-326
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• 1995

Through bioassay-guided separation of the chemical constituents from the heartwood of Dalbergia odorifera, an 2'-O-methoxyisoliquiritigenin(1) was isolated as cytotoxic principle. 1 showed potent cytotoxic activity against the three kinds of human cancer cell lines (A-549, SK-MEL-2 and SK-OV-3) with similar activity to 5-Fluorouracil.

• Asian Pacific Journal of Cancer Prevention
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• v.14 no.8
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• pp.4651-4654
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• 2013

Choroquine (CQ) and valproic acid (VPA) have been extensively studied for biological effects. Here, we focused on efficacy of combined CQ and VPA on osteosarcoma cell lines. Viability of osteosarcoma cell lines (U20S and HOS) was analyzed by MTT assay. Apoptotic assays and colony formation assays were also applied. ROS generation and Western Blotting were performed to determine the mechanism of CQ and VPA combination in the process of apoptosis. The viability of different osteosarcoma cell lines significantly decreased after CQ and VPA combination treatment compared with either drug used alone, and apoptosis was increased significantly. ROS generation was triggered leading to expression of apoptosis related genes being increased and of antiapoptotic related genes being decreased. From our data shown here, CQ and VPA combination treatment in vitro enhanced cytotoxicy to osteosarcoma cells.

• The Korea Journal of Herbology
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• v.21 no.4
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• pp.143-148
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• 2006

Objectives : It is demonstrated that oxygen free radicals have cytotoxic effect on NIH3T3 fibroblast cells. Recently, many of herb extracts have an effect of antioxidant in oxygen free radical-induced cytotoxicity. But, the toxic mechanism of oxygen free radical is left unknown. The purpose of this study was to examine the cytotoxicity of hydrogen peroxide ($H_2O_2$) and antioxidant effect of Citri reticulatae pericarpium (CRP) on NIH3T3 fibroblasts. Methods : The cytotoxicy was measured by cell viability by XTT assay in NIH3T3 fibroblasts. XTT assay is regarded as a very sensitive screening method for the determination of the cell viability on various chemicals. Results : In this study, H2O2 decreased cell viability according to the dose- and time dependent manners after NIH3T3 fibroblasts were treated with various concentrations of H2O2 for 4 hours. And also, CRP showed the effect of antioxidant on $H_2O_2-induced $ cytotoxicity in cultured NIH3T3 fibroblasts. Conclusion : These results suggest that $H_2O_2$ has highly cytotoxic effect on cultured NIH3T3 fibroblasts by the decrease of cell viavility, and the herb extract such as CRP was showed the effect of antioxidant on $H_2O_2-induced$ cytotoxicity in these cultures.

• Biomedical Science Letters
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• v.12 no.4
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• pp.457-461
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• 2006

It is demonstrated that phenolic compound has cytotoxic effect on cancer cells. Recently, ferulic acid is involved in anticancer activity by showing the decrease of cell viability in cancer cells. But, the anticancer mechanism of ferulic acid is left unknown. The purpose of this study was to examine the anticancer activity of ferulic acid on NIH3T3 fibroblasts and human skin melanoma cells (SK-MEL-3). The anticancer activity was measured by determining the cytotoxicy of ferulic acid on these cells. The cytotoxicity was measured by cell viability via XTT assay in these cells. In this study, ferulic acid decreased cell viability according to the dose-dependent manners after human skin melanoma cells were treated with various concentrations of ferulic acid for 48 hours. especially, ferulic acid remarkably decreased cell viability at a concentration of $120{\mu}M$ compared with control in human skin melanoma cells. While, ferulic acid did not show the significant decrease of cell viability at concentrations of $30{\sim}120{\mu}M$ in NIH3T3 fibroblasts. These results suggest that ferulic acid showed anticancer activity in cancer cells such as human skin melanoma cells by the decrease of cell viability significantly.

• Biomedical Science Letters
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• v.12 no.3
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• pp.275-279
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• 2006

It is demonstrated that cadmium has cytotoxic effect on glial cells, oxygen radicals are involved in cadmium-induced cytotoxicity. However, the toxic mechanism of cadmium is left unknown so far. The purpose of this study was to examine the cytotoxicity of $CdCl_2$ on $C_6$ glioma cells. The cytotoxicy was measured by cell viability via XTT assay in $C_6$ glioma cells. Colorimetric assay such as XTT assay is regarded as a very sensitive screening method for the determination of the cell viability on a lots of chemicals. In this study, $CdCl_2$ decreased cell viability according to the dose- and time dependent manners after $C_6$ glioma cells were treated with various concentrations of $CdCl_2$ for 48 hours. $IC_{90}\;and\;IC_{50}$ values for XTT assay was determined at $5{\mu}M\;and\;55{\mu}M$ of $CdCl_2$, respectively. These results suggest that $CdCl_2$ has highly cytotoxic effect on $C_6$glioma cells by the decrease of cell viability.