首页>
外文OA文献
>Polimorfizmi u genima za popravak DNA: poveznica s biomarkerima mikronukleus-testa u medicinskih radnika kronično izloženih niskim dozama ionizirajućeg zračenja
【2h】
Polimorfizmi u genima za popravak DNA: poveznica s biomarkerima mikronukleus-testa u medicinskih radnika kronično izloženih niskim dozama ionizirajućeg zračenja
Individual sensitivity to ionising radiation (IR) is the result of interaction between exposure, DNA damage, and its repair, which is why polymorphisms in DNA repair genes could play an important role. We examined the association between DNA damage, expressed as micronuclei (MNi), nuclear buds (NBs), and nucleoplasmic bridges (NPBs) and single nucleotide polymorphisms in selected DNA repair genes (APE1, hOGG1, XRCC1, XRCC3, XPD, PARP1, MGMT genes; representative of the different DNA repair pathways operating in mammals) in 77 hospital workers chronically exposed to low doses of IR, and 70 matched controls. A significantly higher MNi frequency was found in the exposed group (16.2±10.4 vs. 11.5±9.4; P=0.003) and the effect appeared to be independent from the principal confounding factor. Exposed individuals with hOGG1, XRCC1, PARP1, and MGMT wild-type alleles or APEX1, as well as XPD (rs13181) heterozygous showed a significantly higher MNi frequency than controls with the same genotypes. Genetic polymorphism analysis and cytogenetic dosimetry have proven to be a powerful tool complementary to physical dosimetry in regular health surveillance programmes.
展开▼
机译:个体对电离辐射(IR)的敏感性是暴露,DNA损伤及其修复之间相互作用的结果,这就是DNA修复基因中的多态性可能起重要作用的原因。我们检查了DNA损伤之间的关联,表达为选定的DNA修复基因(APE1,hOGG1,XRCC1,XRCC3,XPD,PARP1,MGMT)中的微核(MNi),核芽(NBs)和核质桥(NPB)和单核苷酸多态性基因;代表长期在低剂量IR下暴露的77名医院工作人员的哺乳动物的不同DNA修复途径的代表,以及70个匹配的对照组。在暴露组中发现MNi频率显着更高(16.2±10.4 vs. 11.5±9.4; P = 0.003),并且该作用似乎与主要混杂因素无关。具有hOGG1,XRCC1,PARP1和MGMT野生型等位基因或APEX1以及XPD(rs13181)杂合子的暴露个体显示出比具有相同基因型的对照显着更高的MNi频率。在常规的健康监测计划中,遗传多态性分析和细胞遗传学剂量测定已被证明是对物理剂量测定的补充的有力工具。
展开▼