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首页> 外文期刊>Toxicology: An International Journal Concerned with the Effects of Chemicals on Living Systems >Tissue distribution of (3)S-labelled perfluorooctane sulfonate in adult mice after oral exposure to a low environmentally relevant dose or a high experimental dose.
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Tissue distribution of (3)S-labelled perfluorooctane sulfonate in adult mice after oral exposure to a low environmentally relevant dose or a high experimental dose.

机译:口服低环境相关剂量或高实验剂量后,成年小鼠中(3)S标记的全氟辛烷磺酸的组织分布。

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摘要

The widespread environmental pollutant perfluorooctane sulfonate (PFOS), detected in most animal species including the general human population, exerts several effects on experimental animals, e.g., hepatotoxicity, immunotoxicity and developmental toxicity. However, detailed information on the tissue distribution of PFOS in mammals is scarce and, in particular, the lack of available information regarding environmentally relevant exposure levels limits our understanding of how mammals (including humans) may be affected. Accordingly, we characterized the tissue distribution of this compound in mice, an important experimental animal for studying PFOS toxicity. Following dietary exposure of adult male C57/BL6 mice for 1-5 days to an environmentally relevant (0.031 mg/kg/day) or a 750-fold higher experimentally relevant dose (23 mg/kg/day) of (3)S-PFOS, most of the radioactivity administered was recovered in liver, bone (bone marrow), blood, skin and muscle, with the highest levels detected in liver, lung, blood, kidney and bone (bone marrow). Following high daily dose exposure, PFOS exhibited a different distribution profile than with low daily dose exposure, which indicated a shift in distribution from the blood to the tissues with increasing dose. Both scintillation counting (with correction for the blood present in the tissues) and whole-body autoradiography revealed the presence of PFOS in all 19 tissues examined, with identification of thymus as a novel site for localization for PFOS and bone (bone marrow), skin and muscle as significant body compartments for PFOS. These findings demonstrate that PFOS leaves the bloodstream and enters most tissues in a dose-dependent manner.
机译:在包括普通人类在内的大多数动物物种中检测到的广泛的环境污染物全氟辛烷磺酸盐(PFOS)对实验动物具有多种影响,例如肝毒性,免疫毒性和发育毒性。但是,关于全氟辛烷磺酸在哺乳动物中的组织分布的详细信息很少,尤其是缺乏与环境有关的接触水平的可用信息,这限制了我们对哺乳动物(包括人类)可能受到影响的理解。因此,我们表征了该化合物在小鼠中的组织分布,小鼠是研究PFOS毒性的重要实验动物。在成年雄性C57 / BL6小鼠的饮食中,与(3)S-的环境相关(0.031 mg / kg /天)或实验相关剂量(23 mg / kg /天)相比,暴露了1-5天(实验相关剂量高了750倍)全氟辛烷磺酸所给予的大部分放射性是在肝脏,骨骼(骨髓),血液,皮肤和肌肉中恢复的,在肝脏,肺,血液,肾脏和骨骼(骨髓)中检出的水平最高。每日高剂量暴露后,全氟辛烷磺酸显示出与低每日剂量暴露不同的分布曲线,这表明随着剂量增加,从血液到组织的分布发生变化。闪烁计数(对组织中存在的血液进行校正)和全身放射自显影均显示在所检查的所有19个组织中都存在PFOS,并将胸腺鉴定为定位PFOS和骨骼(骨髓),皮肤的新部位和肌肉是PFOS的重要身体部位。这些发现表明,全氟辛烷磺酸以剂量依赖的方式离开血流并进入大多数组织。

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