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Biological effects induced by low energy X-Rays Effects of nanoparticles

机译:低能X射线诱导的生物效应纳米粒子的效应

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Samples of plasmid DNA were irradiated with pulsed 18.9 nm radiation originating from a Mo X-ray laser (XRL) pumped in GRIP configuration at the LASERIX facility. Up to 21 000 pulses were delivered with a repetition rate of 10 Hz and average pulse energy of 200 nJ. Radiosensitization by two different platinum compounds (platinum terpyridine chloride (PtTC) and platinum nanoparticles) were investigated. SSB and DSB yields were measured using agarose gel electrophoresis. The occurrence of single and double strand breaks not present in controls having undergone the same treatment except for the XRL irradiation can be seen as a clear effect of the XRL irradiation. This confirms the role of direct effects in DNA damages as previously seen with low energy ions and electrons (1) (2). In addition we demonstrate a DNA breaks enhancement in the presence of platinum. No difference of enhancement was seen between these two radiosensitizers.
机译:质粒DNA样品用18.9 nm的脉冲辐射辐照,该辐射源自在LASERIX设施中以GRIP配置泵浦的Mo X射线激光(XRL)。以10 Hz的重复频率和200 nJ的平均脉冲能量输送了多达21000个脉冲。研究了两种不同的铂化合物(氯化三氯吡啶吡啶(PtTC)和铂纳米颗粒)的放射增敏作用。使用琼脂糖凝胶电泳测量SSB和DSB产量。除XRL辐照外,在经过相同处理的对照中不存在单链和双链断裂的现象,可以看作是XRL辐照的明显效果。这证实了直接作用在DNA损伤中的作用,如先前在低能离子和电子中所见(1)(2)。另外,我们证明了在铂存在下DNA断裂的增强。在这两种放射增敏剂之间没有看到增强的差异。

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