相关实验视频
Updated: Aug 12, 2026

09:28
Automated High-throughput Behavioral Analyses in Zebrafish Larvae
Published on: July 4, 2013
15.8K
斑马鱼的发育性暴露导致的脂质和神经行为变化
Wagner Antonio Tamagno1, Christina R Ferreira2, Chongli Yuan3
1School of Health Sciences, Purdue University, West Lafayette, IN, United States of America; Institute for a Sustainable Future, Purdue University, West Lafayette, IN, United States of America.
Journal of hazardous materials
|January 15, 2026
概括
即使是低度也会损害斑马鱼的神经发育,导致认知缺陷和行为变化. 这些发现表明,在发育过程中暴露于Pb会造成目前安全限值以下的风险.
科学领域:
- 环境毒理学环境毒理学
- 发育神经科学的发展神经科学.
- 斑马鱼模型系统模型系统
背景情况:
- 在发育过程中暴露于 (Pb) 是一个重要的公共卫生问题,没有建立的神经毒性安全门.
- 早期接触环境毒素可能会对认知和行为功能产生持久的影响.
研究的目的:
- 研究斑马鱼 (Danio rerio) 低度胚胎 (Pb) 暴露对神经发育的影响.
- 评估发育性Pb暴露后的认知,行为,生化和脂质学变化.
主要方法:
- 斑马鱼胚胎在受精后1至72小时内暴露在环境相关的Pb度 (0.01,0.1,1ppb) 中.
- 评估神经发育结果,包括认知表现,行为,氧化应激生物标志物和脂质组概况在72和120 hpf.
主要成果:
- 暴露于Pb的幼虫表现出显著的认知障碍,焦虑症类似的行为,并破坏了决策.
- 生物化学分析显示,雌激醇发生变化,抗氧化酶活性受损,氧化应激增加和脂质过氧化.
- 脂质学分析显示,三糖醇 (TG),胆固醇 (CE),斯芬戈米林 (SM),酸胆 (PC) 和酸乙烯胺 (PE) 的显著变化.
结论:
- 低水平的胚胎Pb暴露会损害神经发育,改变脂质代谢,并破坏斑马鱼的氧化平衡.
- 研究结果表明,当度低于当前公认的暴露限值时,会出现不良影响,这突显了对发育神经毒性的担忧.
- 发育中的大脑对Pb的高度敏感性需要进一步研究长期的认知和神经发育后果.
相关概念视频
Amyloid Fibrils
Amyloid fibrils are aggregates of misfolded proteins. Under most circumstances, misfolded proteins are either refolded by chaperone proteins or degraded by the proteasome. However, in the case of a mutation or a disease, these proteins can accumulate to form large clusters and often further assemble to form elongated fibers, called fibrils.
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining, normally used to...
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining, normally used to...
Gut-Brain Axis
The gut–brain axis is a bidirectional communication system that connects the gastrointestinal tract and the brain. This interaction is mediated through multiple pathways, including the vagus nerve, hormonal signals, immune responses, and chemical messengers produced by gut microbes.Microbial Contributions to Brain FunctionGut microbiota contributes significantly to brain function by producing neuroactive compounds. These include neuroactive compounds that influence neurotransmitters such as...
Alzheimer Disease ll: Pathophysiology
Alzheimer disease involves structural changes in the brain that begin long before symptoms appear. The most distinctive features are extracellular neuritic plaques and intracellular neurofibrillary tangles.Neuritic plaques form in the cerebral cortex and around blood vessels. These plaques contain a dense core of beta-amyloid (Aβ)—a toxic protein fragment that clumps outside neurons. The core is surrounded by damaged neuronal extensions, as well as reactive astrocytes and microglia. Abnormal...

