暴露于甲硫酸盐导致斑马鱼在生命早期出现多种发育异常
Chuxin Song1, Siyi Chen2, Zeyu Bi2
1College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China.
Environmental research
|November 27, 2024
概括
早期暴露于硫酸 (PFHxS) 导致斑马鱼的发育毒性,影响心血管和神经系统. 这种持久性有机污染物也可能导致代谢和淋巴腺疾病.
科学领域:
- 环境毒理学环境毒理学
- 发育生物学是发展生物学.
- 斑马鱼模型的模型
背景情况:
- perfluorohexane sulfonate (PFHxS) 是一个新列出的持久性有机污染物,在环境中持续数十年.
- 关于发育性毒性和早期PFHxS暴露的机制的研究有限.
- 了解PFHxS的毒性至关重要,因为它在环境中持久存在,并可能对人类健康造成风险.
研究的目的:
- 在生命早期暴露后,研究斑马鱼中 perfluorohexane sulfonate (PFHxS) 的发育毒性.
- 使用转基因斑马鱼模型阐明PFHxS诱导的发育影响的潜在机制.
- 评估PFHxS对心血管,神经,代谢和性腺系统的影响.
主要方法:
- 使用野生类型和转基因斑马鱼 (心脏CZ40,肝/胰腺CZ16) 进行暴露研究.
- 分析了包括心率,血流和游泳行为在内的表型指标,从受精后24小时 (hpf) 到受精后7天 (dpf).
- 进行基因表达分析以调查分子机制和潜在的雌激素效应.
主要成果:
- PFHxS表现出较低的急性毒性 (LC50>500μM在120hpf),明显低于PFOS.
- 低剂量PFHxS暴露会影响斑马鱼幼虫的心率,血流和游泳行为.
- 转基因斑马鱼的数据证实了心血管系统的破坏,并暗示了潜在的代谢障碍和性腺发育影响.
结论:
- 早期接触PFHxS会导致斑马鱼显著的发育毒性,影响多个器官系统.
- PFHxS对水生环境和潜在的人类健康构成风险,特别是在早期发展阶段.
- 需要进一步的研究,以充分了解PFHxS暴露的长期后果和机制.
相关概念视频
02:27Background and Environment Affect Phenotype
Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
01:20Inborn Errors of Metabolism
Phenylketonuria (PKU) is a protein metabolism disorder characterized by high blood levels of the amino acid phenylalanine. This results from a mutation in the gene responsible for phenylalanine hydroxylase, an enzyme that converts phenylalanine into tyrosine. When this enzyme is deficient, phenylalanine builds up in the blood, leading to symptoms such as vomiting, rashes, seizures, growth deficiency, and severe mental retardation. An early diagnosis and a diet restricting phenylalanine intake...
01:19Acid Mine Drainage
Mining activities that disturb sulfide-rich rocks, particularly those containing pyrite (FeS₂), initiate a cascade of geochemical and microbiological processes with serious environmental implications. When exposed to air and water, pyrite undergoes oxidation, releasing sulfate, ultimately forming sulfuric acid and mobilizing heavy metals into surrounding water systems. This phenomenon, known as acid mine drainage (AMD), results in low pH waters laden with toxic elements that threaten aquatic...