The effects of ultrasound and arsenic trioxide on neurogliocytoma cells and secondary activation of macrophages

文献类型： 外文期刊

第一作者： Xu, Yonggang

作者： Xu, Yonggang;Liu, Xiaoqian;Wang, Zhi;Yue, Wu;Wang, Jie;Zhang, Yafang;Ma, Jing

作者机构：

关键词： neurogliocytoma;macrophage;cell death;ultrasound

期刊名称：TUMORI （ 影响因子：2.098； 五年影响因子：1.722 ）

ISSN： 0300-8916

年卷期： 2009 年 95 卷 6 期

页码：

收录情况： SCI

摘要： Aims and background. As a new technique for clinical therapeutics, ultrasound has synergistic effects on traditional chemotherapy. Arsenic trioxide (AS(2)O(3)), an apoptosis-inducing drug, has successfully been used in the treatment of some tumor types in recent years. Macrophages have both positive and negative effects on the occurrence and development of tumors. The aim of this study was to observe the effects of ultrasound and AS(2)O(3) on a glioma cell line and the secondary activation of macrophages by cell death, in order to provide a theoretical basis for the clinical application of AS(2)O(3) and ultrasound in glioma treatment. Methods. Different AS(2)O(3) concentrations were used solely or combined with ultrasound in rat glioma C6 cells to induce cell death. The degree of C6 cell death was determined by Annexin V-FITC and PI double staining. The intracellular arsenium concentration and the release of lactate dehydrogenase (LDH) from C6 cells were also measured. The supernatant of C6 cells was then used to stimulate macrophages. Finally, the activation of NF-kappa B and the secretion of TNF-alpha and TGF-beta 1 by macrophages were determined. Results. The cell death increase in the group where ultrasound was used together with AS(2)O(3) was significantly higher than that obtained by either ultrasound or AS(2)O(3). The increase was also significantly higher than the sum of the increases in the ultrasound and the AS(2)O(3) only groups. At the same AS(2)O(3) concentration, additional treatment with ultrasound can significantly increase the intracellular arsenium concentration. The release of LDH from C6 cells showed a close, direct correlation with late apoptosis and necrosis, but did not exhibit an obvious correlation with early apoptosis. The activation of NF-kappa B and the secretion of TNF-alpha. and TGF-beta 1 in macrophages also showed a close direct correlation with late apoptosis and necrosis. Conclusions. This in vitro study demonstrates that ultrasound may synergistically enhance the cell-killing effect by promoting AS(2)O(3) to enter the C6 cells. Macrophages may be activated by killed C6 cells, especially by necrotic C6 cells.

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