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Effects of acute low doses of Gamma-radiation on erythrocytes membrane

机译:急性低剂量γ射线对红细胞膜的影响

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It is believed that any dose of ionizing radiation may damage cells and that the mutated cells could develop into cancer cells. Additionally, results of research performed over the past century on the effects of low doses of ionizing radiation on biological organisms show beneficial health effects, called hormesis. Much less is known about the cellular response to low doses of ionizing radiation, such as those typical for medical diagnostic procedures, normal occupational exposures or cosmic-ray exposures at flight altitudes. Extrapolating from the effects observed at higher doses to predict changes in cells after low-dose exposure is problematic. We examined the biological effects of low doses (0.01-0.3 Gy) of γ-radiation on the membrane characteristics of erythrocytes of albino rats and carried out osmotic fragility tests and Fourier transform infrared spectroscopy (FTIR). Our results indicate that the lowest three doses in the investigated radiation range, i.e., 0.01, 0.025 and 0.05 Gy, resulted in positive effects on the erythrocyte membranes, while a dose of 0.1 Gy appeared to represent the limiting threshold dose of those positive effects. Doses higher than 0.1 Gy were associated with the denaturation of erythrocyte proteins.
机译:据信任何剂量的电离辐射都可能损害细胞,并且突变的细胞可能发展成癌细胞。另外,在过去的一个世纪中,有关低剂量电离辐射对生物体的影响的研究结果显示出有益的健康效应,即兴奋剂。关于细胞对低剂量电离辐射的反应知之甚少,例如医学诊断程序,正常职业暴露或飞行高度下的宇宙射线暴露所常见的辐射。从高剂量观察到的效应推断来预测低剂量暴露后细胞的变化是有问题的。我们检查了低剂量(0.01-0.3 Gy)的γ射线对白化病大鼠红细胞膜特性的生物学影响,并进行了渗透脆性测试和傅里叶变换红外光谱(FTIR)。我们的结果表明,在所研究的辐射范围内,最低的三个剂量(即0.01、0.025和0.05 Gy)对红细胞膜产生积极影响,而0.1 Gy的剂量似乎代表了这些积极影响的极限阈值剂量。高于0.1 Gy的剂量与红细胞蛋白的变性有关。

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