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微核测试法(Micronucleus test)能否用来评价放射线职业人员所受的慢性辐射损伤,至今文献报道结果尚不一致。本实验以~(60)Coγ线对狗进行了持续三年的低剂量率全身照射,动态观察了实验狗淋巴细胞的微核率-剂量和剂量率效应,以及微核率与染色体无着丝粒断片率之间的关系,并对停照后微核率的恢复过程作了长达三年的观察,以期对M.t作为慢性辐射损伤“生物剂量计”的可能性作一初步讨论。材料和方法动物分组:江浙地区健康雄性狗30条,年龄2~3岁,体重11.6~14.9kg,随机分
Whether the Micronucleus test can be used to evaluate chronic radiation injury suffered by radiation professionals has not been reported in the literature yet. In this study, the dog was subjected to a low-dose-rate systemic irradiation for 3 years with ~(60)Co gamma rays. The micronuclear rate, dose and dose rate effects of lymphocytes in experimental dogs were dynamically observed, and the micronucleus rate and chromosomes were not mediated. The relationship between the fragmentation rate and the recovery process of the micronuclear rate after a stop-motion was observed for a period of up to three years in order to make a preliminary discussion on the possibility of Mt acting as a “biodosimeter” for chronic radiation damage. Materials and Methods Animal grouping: 30 healthy male dogs in Jiangsu and Zhejiang Provinces, aged 2 to 3 years, weight 11.6 to 14.9 kg, randomized