...
首页> 外文期刊>Food and Chemical Toxicology: An International Journal Published for the British Industrial Biological Research >Role of toxicokinetics and alternative testing strategies in pyrrolizidine alkaloid toxicity and risk assessment; state-of-the-art and future perspectives
【24h】

Role of toxicokinetics and alternative testing strategies in pyrrolizidine alkaloid toxicity and risk assessment; state-of-the-art and future perspectives

机译:毒物动力学和替代测试策略在吡咯烷生物碱毒性和风险评估中的作用; 最先进的和未来的观点

获取原文
获取原文并翻译 | 示例
           

摘要

Toxicokinetics influences the toxicity of chemicals. This also holds for 1,2-unsaturated pyrrolizidine alkaloids (PM), which need bioactivation to become toxic. Given that only for a limited number of 1,2-unsaturated PAs in vivo toxicity data are available, alternative testing strategies including read-across and quantitative in vitro to in vivo extrapolation (QIVIVE) are important. This paper presents how physiologically-based kinetic (PBK) models for the PAs lasiocarpine and riddelliine were developed for rat and human, and used for conversion of in vitro data for toxicity in primary hepatocytes to quantitatively predict in vivo acute liver toxicity for both rat and human. Marked differences in toxicokinetics were observed between the two model PM influencing the predicted in vivo toxicity. In a next step, in vitro toxicokinetic data that predicted relative bioactivation of the PM, were shown to provide a possible basis for read-across from the BMDL10 for tumor formation by riddelliine of 237 mu g/kg bw per day to other PM for which tumor data are lacking. It is concluded that when comparing toxicity of different PM, or when extrapolating in vitro toxicity data for PM to the in vivo situation, differences in toxicokinetics should be taken into account, while future challenges are also discussed.
机译:毒物管制性影响化学品的毒性。这也适用于1,2-不饱和吡咯烷生物碱(PM),其需要生物活化以变得有毒。鉴于仅在体内毒性数据中仅用于有限数量的1,2-不饱和PAS,可用的替代测试策略包括在体内外推体外的读数和定量的校正(Qivive)是重要的。本文介绍了对大鼠和人类开发了PAS Lasiocarpine和Riddelliine的基于物理学的动力学(PBK)模型,并用于转化原发性肝细胞中的体外数据,以定量预测大鼠的体内急性肝毒性。人类。在两种模型PM之间观察到毒物动量的显着差异,影响预测的体内毒性。在下一步中,显示预测PM的相对生物活化的体外毒性数据,显示为通过每天237μg/ kg bw的raddelliine从BMDL10中读取肿瘤形成的读取的可能依据缺乏肿瘤数据。得出结论是,当比较不同PM的毒性,或者在将PM的体外毒性数据推断到体内情况时,应考虑到未来的挑战,应考虑到毒性的毒性数据的毒性数据。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号