As a class of replacements for the commercial PentaBDE mixture, Tris(1,3-dichloro-2-propyl) phosphate (TDCPP) has been frequently detected in foam used in furniture and baby products,and thus humans are the most likely to be chronic exposed. Limited information is currently available about the toxic effects and mechanisms of TDCPP, the prenatal transfer effects and toxicity to the offspring are still unclear. In this study, adult zebrafish are exposed to different concentrations of TDCPP via water for two months,the residue of TDCPP are detected in both adults and F1 eggs, and the parent pass-through effect of the chemical will be identified. Furthermore, by observing locomotion activity in the larvae, detecting gene transcriptions and protein levels of central nervous system development, measuring the acetylcholinesterase(AChE) activity, we will study effects and mechanism of developmental neurotoxicity in the offspring. This study will provide the information for prenatal transfer of TDCPP and explore the adverse effects and molecular mechanism on neurodevelopment in zebrafish offspring, and will provide new research idea when studying developmental toxicity of other organophosphorus flame retardants.
磷酸三(1,3-二氯异丙基)酯(tris(1,3-dichloro-2-propyl) phosphate, TDCPP)作为多溴联苯醚(PBDEs)的主要替代品之一,大量存在于软垫家具和婴儿产品中,导致人群长期处于其慢性暴露环境中。我们选用斑马鱼成鱼进行TDCPP长期暴露,分析该化合物在母体和子代中的蓄积特征,研究其通过母体传递至子代的过程和效应。同时,我们将研究母体传递效应对子代幼鱼运动行为的影响,检测子代幼鱼(受精后96小时(96hpf))中枢神经系统发育相关基因和蛋白的表达量变化,神经递质乙酰胆碱酯酶(AChE)的活性,评价TDCPP母体暴露对子代神经发育的影响,并揭示其分子机理。本项目系统研究了TDCPP的母体传递效应及其对子代神经发育的毒性效应和机制,为全面评价TDCPP的生态健康风险提供理论依据,并为其他有机磷阻燃剂污染物的毒性评价提供新的思路。
磷酸三(1,3-二氯异丙基)酯(tris(1,3-dichloro-2-propyl) phosphate, TDCIPP)作为多溴联苯醚(PBDEs)的主要替代品之一,大量存在于软垫家具和婴儿产品中, 导致人群长期处于其慢性暴露环境中。本课题以斑马鱼为研究模型,首先进行了环境剂量TDCIPP的长期暴露实验,评价了TDCIPP的母体传递效应及其对子代运动行为和神经发育的影响,研究发现环境剂量TDCIPP会在母代斑马鱼体内蓄积并传递至子代胚胎,抑制中枢神经发育相关基因的表达,并抑制子代幼鱼的运动行为。在长期暴露的过程中,我们发现环境剂量TDCIPP暴露能够引起斑马鱼母代和子代的生长发育毒性,其毒性机制可能与生长轴上关键基因的表达受抑制有关。最后,为了深入研究TDCIPP对斑马鱼运动行为的影响机制,我们结合转基因斑马鱼和野生型斑马鱼进行了进一步的研究。通过使用显微镜成像技术,我们发现TDCIPP会抑制转神经细胞斑马鱼绿色荧光的表达,表明TDCIPP会减少神经元细胞的数量;基因和蛋白表达结果分析表明TDCIPP通过抑制运动神经元分化和轴突生长而影响运动神经元的功能,神经递质含量和活性测定结果表明TDCIPP会降低乙酰胆碱含量,抑制乙酰胆碱酯酶活性,这些可能是斑马鱼游泳运动行为受TDCIPP显著性抑制的原因。上述部分研究结果发表在环境毒理学国际核心杂志《Environmental pollution 》(1篇)和《Environmental Sciences & Technology》(1篇)上,为全面评价TDCIPP的生态健康风险提供理论依据,并为其他有机磷阻燃剂污染物的毒性评价提供新的思路。
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数据更新时间:2023-05-31
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