中国科学技术大学学报 ›› 2014, Vol. 44 ›› Issue (8): 648-654.DOI: 10.3969/j.issn.0253-2778.2014.08.003

• 原创论文 • 上一篇    下一篇

氧化锌与氯化镉在老鼠体内的协同毒性

高 上   

  1. 中国科学技术大学化学系,安徽合肥 230026
  • 收稿日期:2014-05-30 修回日期:2014-06-17 出版日期:2014-08-31 发布日期:2014-08-31
  • 作者简介:GAO Shang, male, born in 1990, master. Research field: bioinorganic chemistry. E-mail: gaos@mail.ustc.edu.cn

Synergistic toxicity of bulk zinc oxide and cadmium chloride in mice

GAO Shang   

  1. Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
  • Received:2014-05-30 Revised:2014-06-17 Online:2014-08-31 Published:2014-08-31
  • Contact: XU Xiaolong

摘要: 随着氧化锌的广泛应用和镉的广泛污染, 人类同时暴露于这两种污染物的概率大大增加. 研究了氧化锌与氯化镉对小鼠的协同毒性. 实验分为4组:①对照组;②氯化镉组;③氧化锌组;④同时注射氧化锌和氯化镉组. 实验结果表明,氧化锌对小鼠毒性很小,相反,氯化镉对小鼠肝产生严重的功能和病理损伤.虽然小鼠在同时暴露于氧化锌和氯化镉时,锌和镉在肝中有正的协同聚集作用, 但氧化锌能显著抑制氯化镉造成的肝损伤. 氧化锌诱导的金属硫蛋白合成以及氧化锌对镉引起锌稳态失衡的抑制,在氧化锌抑制氯化镉毒性的作用中发挥重要作用.

关键词: 重金属, 组织病理学, 协同毒性, 腹腔注射

Abstract: The wide applications of zinc oxide (ZnO) and ubiquitous cadmium (Cd) pollution have increased the risk of humans co-exposure to ZnO and Cd. The synergistic toxicity of bulk ZnO and CdCl2 in mice was investigated. Mice were randomly divided into four groups: a control group and three experimental groups (bulk ZnO, CdCl2, bulk ZnO+CdCl2). Bulk ZnO shows low toxicity in mice. In contrast, CdCl2 causes siginificant damage in the liver indicated by severe liver dysfunction and histopathological abnormalities. Although co-exposure to bulk ZnO and CdCl2 has positive synergistic effects on the uptakes of Zn and Cd in the liver, bulk ZnO can significantly alleviate CdCl2-induced damage in the liver. The bulk ZnO-induced metallothionein synthesis and the inhibition of Cd-induced deprivation of tissue Zn by bulk ZnO might play two key roles in the protective effect of bulk ZnO on CdCl2-induced damage in the liver.

Key words: heavy metal, histopathology, synergistic toxicity, intraperitoneal injection