暴露于具有环境代表性的聚二乙烯 (PBDE) 混合物会改变斑马鱼的神经肌肉发育
Alec McDermott1, Cécilia Bernier1, Vanessa Piché1
1INRS - Centre Armand Frappier Santé Biotechnologie, 531 Boulevard des Prairies, Laval, QC H7V 1B7, Canada.
Neurotoxicology
|November 3, 2024
概括
聚二乙烯 (PBDE) 通过诱导神经元死亡,导致斑马鱼的神经发育缺陷. 这导致运动障碍和形态变化,突出表现为PBDE.
科学领域:
- 环境毒理学环境毒理学
- 神经科学是一个神经科学.
- 发展生物学 发展生物学
背景情况:
- 聚二乙烯 (PBDE) 是消费品中广泛使用的制阻燃剂 (BFR).
- 鉴于PBDE被认为是内分泌干扰物和神经发育毒素,人们对环境污染和生物积累感到担忧.
- 了解PBDE对发展中生物的毒理影响对于风险评估至关重要.
研究的目的:
- 为了研究PBDE混合物暴露在斑马鱼 (Danio rerio) 胚胎和幼虫中的神经发育和形态影响.
- 评估PBDE对运动行为,神经网络密度和神经肌肉结合发展的影响.
- 在脊椎动物模型中阐明PBDE诱导的神经毒性的细胞机制.
主要方法:
- 斑马鱼胚胎/幼虫在受精后1至6天内暴露在一个度范围 (1.5300 pM) 的PBDE混合物中.
- 评估化率,死亡率,一般形态和运动行为.
- 利用免疫染 (乙化α-tubulin,SV2,-BTX,切割caspase-3) 和成像分析神经和神经肌肉结构和细胞死亡.
主要成果:
- 在较高的PBDE度下观察到延迟化和增加死亡率.
- 幼虫表现出一种上升的表型和减少的运动能力,这表明了运动缺陷.
- 暴露于PBDE导致了剂量依赖的神经元损失,神经肌肉结形成受损,细胞死亡增加.
结论:
- 暴露于PBDE显著破坏斑马鱼的神经肌肉系统,导致神经元死亡和随后的形态和运动缺陷.
- 这些发现强调了PBDE的神经毒性潜力,并强调了斑马鱼作为毒理学研究模型的实用性.
- 这些结果强调了与PBDE污染相关的环境和健康风险.
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