化PAH和替代型氨酸的发育毒性:结构细微差别导致多种毒性和AHR激活
Mackenzie L Morshead1, Lisa Truong1, Michael T Simonich1
1Department of Environmental and Molecular Toxicology and the Oregon State University Superfund Center, Oregon State University, ALS 1007, Corvallis, OR, 97331, USA.
这项研究选了斑马鱼中的104种基化多环芳 (PAH),发现替代类型和位置显著影响PAH毒性和基碳水化合物受体 (AHR) 激活. Cyp1a诱导并不总是毒性的可靠指标.
科学领域:
- 环境毒理学环境毒理学
- 化学生物学 化学生物学
- 药理学 药理学是指药理学的学科.
背景情况:
- 多环芳 (PAH) 是复杂混合物中发现的环境污染物.
- 了解替代PAH的毒性至关重要,因为它们的丰富性和更高生物活性的潜力.
- 基碳化合物受体 (AHR) 途径是PAH毒性的关键媒介.
研究的目的:
- 用斑马鱼模型研究104种基化PAH的结构-活性关系.
- 评估通过cyp1a诱导表示的AHR激活在PAH诱导毒性的作用.
- 为了区分化与极性衍生物的毒理学概况.
主要方法:
- 在生命早期斑马鱼胚胎中对104种基化PAH进行高通量查.
- 暴露于PAHs的度在0.1至100μM之间.
- 评估形态和行为变化,并使用光记者线诱导cyp1a.
主要成果:
- 33.7%的选的基化PAHs引起了形态或行为影响,其中65%也诱导cyp1a.
- 30%的化学物质诱导cyp1a,而不会引起可观察到的毒性.
- 极地是比基化衍生物更强大的毒剂,它们的毒性是AHR独立的,尽管在50%的病例中诱导了cyp1a.
结论:
- PAH的毒性高度依赖于基/极性替代的类型,位置和程度.
- 通过cyp1a诱导表示的烯碳化合物受体 (AHR) 激活并不总是与观察到的PAH毒性或AHR依赖性相关.
- 极地氨酸代表了严重的毒理问题,其毒性机制可能独立于AHR信号.
更多相关视频
07:08Long-term Behavioral and Reproductive Consequences of Embryonic Exposure to Low-dose Toxicants
Published on: March 6, 2018
09:33Formation of Covalent DNA Adducts by Enzymatically Activated Carcinogens and Drugs In Vitro and Their Determination by 32P-postlabeling
Published on: March 20, 2018
相关概念视频
Phase I Reactions: Oxidation of Aliphatic and Aromatic Carbon-Containing Systems
Oxidation reactions are fundamental in aromatic carbon-containing systems. An example is the hydroxylation of phenobarbital, a process that transforms it into...
Physical Properties of Amines
Toxic Reactions: Overview
Toxicity falls into two primary categories: local and systemic.
Local toxicity appears at the exposure site, such as protein denaturation caused by caustic substances.
In contrast, systemic toxicity requires the toxic agent's absorption and distribution,...
Types of Toxins
Air pollutants, primarily gases, pose significant threats to respiratory health, leading to conditions like hypoxia, lung cancer, and in extreme cases, death.
Environmental pollutants like...
Mutagenicity and Carcinogenicity
Anticholinesterase Agents: Poisoning and Treatment
Irreversible agents form a strong bond with the cholinesterase enzyme, making it inactive. The breakdown of the phosphorylated enzyme is...
