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首页> 外文期刊>Journal of Photochemistry and Photobiology, B. Biology: Official Journal of the European Society for Photobiology >Involvement of reactive oxygen species and calcium in photo-induced membrane damage in HeLa cells by a bis-methanophosphonate fullerene
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Involvement of reactive oxygen species and calcium in photo-induced membrane damage in HeLa cells by a bis-methanophosphonate fullerene

机译:双-甲基膦酸酯富勒烯对活性氧和钙参与HeLa细胞光诱导的膜损伤的影响

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摘要

Photo-excited bioactivities of fullerene derivatives are attracting much attention. In this report, a bis-methanophosphonate fullerene (BMPF) and the other two fullerene derivatives, a bis-malonic acid fullerene (BMAF) and a fullerol were incubated with HeLa cells and irradiated with a green light emitted from a mercury lamp on a fluorescent microscopy. By using DNA fluorescent probe propidium iodide staining method, damage towards cell membrane could be detected when cells were treated by irradiation altogether with BMPF or BMAF at a low concentration (4 μM), and the damage was dose-dependent. The activity of BMPF was much higher than that of BMAF, while fullerol had no effects under the same condition. It was also revealed that different kinds of reactive oxygen species (ROS) correlated to BMPF and BMAF. Additionally, presence of extracellular calcium could promote the activities of both derivatives, while removal of extracellular calcium could not abort their membrane-damaged activities. These results indicated that ROS and calcium were involved in the photosensitization of fullerene derivatives, and BMPF was a superior photosensitizer which would find potential application in biomedical field.
机译:富勒烯衍生物的光激发生物活性引起了人们的广泛关注。在本报告中,将双-甲基膦酸酯富勒烯(BMPF)和其他两种富勒烯衍生物,双丙二酸富勒烯(BMAF)和富勒醇与HeLa细胞一起孵育,并用汞灯发出的绿光照射荧光灯显微镜检查。通过使用DNA荧光探针碘化丙啶染色方法,当用低浓度(4μM)的BMPF或BMAF一起照射细胞时,可以检测到对细胞膜的损伤,并且损伤是剂量依赖性的。 BMPF的活性远高于BMAF,而富勒醇在相同条件下无作用。还揭示了不同种类的活性氧(ROS)与BMPF和BMAF相关。另外,细胞外钙的存在可以促进两种衍生物的活性,而细胞外钙的去除不能中止其膜破坏的活性。这些结果表明ROS和钙参与了富勒烯衍生物的光敏化,并且BMPF是一种优异的光敏剂,将在生物医学领域中找到潜在的应用。

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