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Synergistic Effects of Ionizing Radiation and Mercury Chloride on Cell Viability in Fish Hepatoma Cells  

Han, Min (Korea Atomic Energy Research Institute, Advanced Radiation Technology Institute)
Hyun, Kyung-Man (Korea Atomic Energy Research Institute, Advanced Radiation Technology Institute)
Nili, Mohammad (Dawnesh Radiation Research Institute)
Hwang, In-Young (Department of Environmental Science and Engineering, Inje University)
Kim, Jin-Kyu (Korea Atomic Energy Research Institute, Advanced Radiation Technology Institute)
Publication Information
Korean Journal of Environmental Biology / v.27, no.2, 2009 , pp. 140-145 More about this Journal
Abstract
All organisms are being exposed to harmful factors present in the environmental. The combined action of various factors is a distinguishing feature of modern life. An interaction between two chemicals is considered as synergistic when the effect produced is greater than the sum of the two single responses. The biological effects due to the combined action of ionizing radiation with the other factor are hard to estimate and predict in advance. In the current study, we investigated the synergistic effects between ionizing and $HgCl_2$ using fish hepatoma cells (PLHC-1 cells). The results showed a dramatic decrease of cell viability after simultaneous treatment of PLHC-1 cells with ionizing radiation and $HgCl_2$. Neiither of the two had any cytotoxic effect when treated alone. The cytotoxicity of ionizing radiation was enhanced in the presence of $HgCl_2$. The synergistic effects were observed after exposure of the PLHC-1 cells to ionizing radiation combined with $HgCl_2$. The synergistic interaction was due to an increase of irreversibly damaged cells after the combined exposure. Analysis of the extent of synergistic interaction enables to make quantitative estimation of irreversibly damaged cells after the combined exposure. The present study suggests that PLHC-1 cells can serve as rapid screening tools for detecting the toxicity of harmful factors.
Keywords
radiation; mercury chloride; fish hepatoma cells; synergistic interaction;
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