• 刘旺,梁雪芳,李霞,杨慧婷,郭伟.2,4-二叔丁基苯酚对斑马鱼早期发育阶段的神经毒性[J].环境科学学报,2021,41(7):2913-2921

  • 2,4-二叔丁基苯酚对斑马鱼早期发育阶段的神经毒性
  • Neurotoxicity of 2,4-di-tert-butylphenol on the early-staged zebrafish
  • 基金项目:国家自然科学基金(No.21866024);内蒙古自治区自然科学基金(No.2020MS02003);内蒙古大学校级大学生创新创业训练计划项目(No.202017400)
  • 作者
  • 单位
  • 刘旺
  • 内蒙古大学生态与环境学院, 内蒙古自治区环境污染控制与废物资源化重点实验室, 呼和浩特 010021
  • 梁雪芳
  • 内蒙古大学生态与环境学院, 内蒙古自治区环境污染控制与废物资源化重点实验室, 呼和浩特 010021
  • 李霞
  • 内蒙古大学生态与环境学院, 内蒙古自治区环境污染控制与废物资源化重点实验室, 呼和浩特 010021
  • 杨慧婷
  • 内蒙古大学生态与环境学院, 内蒙古自治区环境污染控制与废物资源化重点实验室, 呼和浩特 010021
  • 郭伟
  • 内蒙古大学生态与环境学院, 内蒙古自治区环境污染控制与废物资源化重点实验室, 呼和浩特 010021
  • 摘要:2,4-二叔丁基苯酚(2,4-di-tert-butylphenol,2,4-DTBP)作为一种合成酚类抗氧化剂(Synthetic Phenolic Antioxidants,SPAs)被广泛应用于塑料、橡胶、食品等工业产品中,近年来在水体、空气、生物体中被不同程度检出.然而目前有关2,4-DTBP的毒理学研究十分有限,尤其是对鱼类早期发育阶段的神经毒性效应尚未可知.因此,本文以斑马鱼为研究对象,在涵盖环境相关浓度水平上(0.01、0.1和1 μmol·L-1,即2.06、20.6和206 μg·L-1),从运动活性、焦虑行为及多巴胺和5-羟色胺神经信号通路的基因转录水平探讨2,4-DTBP对斑马鱼早期发育阶段的神经毒性效应及其作用机制.结果发现,0.01和0.1 μmol·L-1 2,4-DTBP暴露引起仔鱼在暗周期过度活跃,1 μmol·L-1 2,4-DTBP暴露引起仔鱼在光周期异常平静及焦虑行为,斑马鱼的行为异常可能与5ht1abdrd1的过度表达有关.研究表明,2,4-DTBP可能对斑马鱼早期发育阶段具有神经毒性,且不同剂量下的作用机制不同.
  • Abstract:2,4-RRdi-RRtert-RRbutylphenol, a typical synthetic phenolic antioxidant, has been widely used in industrial products such as plastics, rubber, and food. In recent years, 2,4-DTBP has been detected in water, air, and organisms. However, the neurotoxicity of 2,4-DTBP and the underlying mechanisms were not well documented. In this study, zebrafish embryos were exposed to 0.01, 0.1, and 1 μmol·L-1 (equal 2.06, 20.6, and 206 μg·L-1) 2,4-DTBP for 6 days. After exposure, locomotion behavior in dark photokinesis test and light-dark preference test, as well as the expression of genes related to dopamine signaling and serotonin signaling were performed to investigate the toxic effects of 2,4-DTBP in zebrafish larvae. Results showed that 0.01 and 0.1 μmol·L-1 2,4-DTBP could induce hyperactivity of zebrafish larvae in dark period in dark photokinesis test, which may be related to the over-expression of 5ht1ab and drd1. However, 1 μmol·L-1 2,4-DTBP could cause slightly anxiety-like activity in larvae in light-dark preference test, which might be induced by the up-regulation of drd1. In summary, 2,4-DTBP might cause neurotoxicity in early-staged zebrafish, while the toxic mechanism is dose-dependent.

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