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不同毒性等级的化学品对线虫感知行为的影响 被引量:3

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摘要 目的本研究测定并评价化学品作用于模式生物线虫后对其感知行为的毒性影响,为今后将模式生物线虫应用于化学品毒性研究和评价奠定基础。方法以GHSⅢ到Ⅵ毒性等级的化学品为研究对象,每等级中选取3~8个化学品,对秀丽隐杆线虫(Nematode Caenorhabditisel egans,以下简称线虫)进行6h亚急性染毒,采用趋避指数和趋向指数,测定并评价化学品作用于模式生物线虫后对其感知行为的毒性影响,分析亚急性染毒条件下上述指数测定值的变化与化学品GHS毒性分级间的联系,以及与本课题组前期研究获得的线虫急性毒性指标(24hLC50)之间的内在关联性,探讨以上述指数作为化学品非致死性评价初始检测指标的可行性,并据此提出今后化学品的线虫亚急性毒性检测的推荐染毒剂量范围。结果化学品作用于线虫的趋避指数和趋向指数与其GHS分级、24hLC50有一定关联:GHS级别越高,出现趋避阳性的概率越低,且趋避阳性的最高剂量值也越大;GHS级别越高,出现趋向阳性的概率越高,且趋向阳性的最高剂量值越大。结论线虫趋避指数和趋向指数与化学品毒性大小有一定的关联性,推荐将这两个指数作为研究化学品的线虫亚急性毒性检测的初始检测指标。基于本实验结果推荐今后线虫的亚急性毒性实验的最高染毒剂量为其24hLC50的1/12~1/2。
出处 《毒理学杂志》 CAS CSCD 北大核心 2014年第1期47-53,共7页 Journal of Toxicology
基金 国家自然科学基金(81273108) 首都卫生发展科研专项(首发2011-1013-03) 北京市卫生系统高层次卫生技术人才培养项目(2011) 市委组织部人才项目(2013)
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参考文献12

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共引文献36

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