[Morphometric and cytogenetic studies of the follicular epithelium thyroid of small mammals under chronic exposure to small doses].

O V Raskosha, O V Ermakova, A V Pavlov, T V Korableva
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Abstract

We have detected the genotoxic effect (increase of micronuclei) after chronic exposure to low-level ionizing radiation of the thyroid follicular epithelium of the voles living for many generations in the radioactive territory. At the same time, we also discovered the stimulating effect of chronic low-level ionizing radiation on the activity of morphogenetic processes in the thyroid parenchyma of the animals from natural populations (increased micro-follicles). These data were confirmed by the experiments; chronic irradiation of the thyroid gland of rats at the doses of 5 and 50 cGy revealed an increased induction of micronuclei and the increase in the number of small follicles. An increased proliferative potential of thyroid may be regarded as a non-specific adaptive response to chronicbody exposure to ionizing radiation.

[小剂量慢性照射下小型哺乳动物甲状腺滤泡上皮的形态计量学和细胞遗传学研究]。
我们已经检测到遗传毒性效应(微核增加)后长期暴露于低水平电离辐射的田鼠甲状腺滤泡上皮生活在放射性领土的许多代。同时,我们还发现慢性低水平电离辐射对自然种群动物甲状腺实质形态发生过程活性的刺激作用(微滤泡增加)。实验证实了这些数据;5和50 cGy剂量慢性照射大鼠甲状腺显示微核诱导增加和小卵泡数量增加。甲状腺增生潜力的增加可能被认为是慢性暴露于电离辐射的非特异性适应性反应。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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