![Chemical-Induced Skin Carcinogenesis Model Using Dimethylbenz[a]Anthracene and 12-O-Tetradecanoyl Phorbol-13-Acetate DMBA-TPA](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F60445.jpg&w=3840&q=50)
专家小组对1,4-二氧化的瘤作用模式的评估及其对人类风险评估的影响
C R Kirman1, J S Bus2, S Gupta3
1SciPinion, Bozeman, MT, USA.
Regulatory toxicology and pharmacology : RTP
|September 27, 2025
概括
专家们评估了对动物瘤1,4-二氧化 (1,4-DX) 的作用模式. 他们发现了非遗传毒性机制的有力证据,支持风险评估中的非线性推断.
科学领域:
- 毒理学 毒理学 毒理学
- 风险评估 风险评估
- 致癌的发生是致癌的产生.
背景情况:
- 作用方式 (MOA) 对于风险评估决策至关重要,特别是低剂量推断.
- 1,4-二氧化 (1,4-DX) 动物瘤需要MOA评估来准确评估人类健康风险.
研究的目的:
- 评估1,4-DX动物瘤的MOA和人类相关性.
- 为了支持对1,4-DX的MOA依赖的风险评估决策.
主要方法:
- 一个独立的专家小组审查了动物肝脏,鼻腔和腹腔瘤中1,4-DXMOA的证据.
- 对不同拟议的MOA,包括直接的基因毒性和间接的非基因毒性途径,分配了信心等级.
主要成果:
- 对于肝脏瘤,最有力的证据支持间接的基因毒性MOA,包括CYP2E1的代谢和,氧化应激和再生增殖.
- 非基因毒性MOA被认为是可信的鼻腔和腹腔瘤.
- 专家对非遗传毒性MOA (+2.5至+3.3) 的信心明显高于对直接遗传毒性MOA的信心 (-3.8至-4.5).
结论:
- 这些发现支持在人类健康风险评估中对1,4-DX动物瘤使用非线性推断方法.
- 对CYP2E1的代谢和被确定为1,4-DX肝脏瘤的MOA早期关键事件.
更多相关视频
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
14.3K
06:47One-step Protocol for Evaluation of the Mode of Radiation-induced Clonogenic Cell Death by Fluorescence Microscopy
Published on: October 23, 2017
11.9K
相关概念视频
01:25Mutagenicity and Carcinogenicity
1.9K
Mutagenicity and carcinogenicity refer to the ability of drugs to cause genetic defects and induce cancer, respectively. The International Agency for Research on Cancer (IARC) classifies agents into four groups based on their carcinogenic potential. Group 1 agents are known human carcinogens; group 2A agents are probably carcinogenic to humans; group 3 agents lack data to support their role in carcinogenesis; and group 4 includes agents for which data support that they are not likely to be...
1.9K
01:36Types of Toxins
3.2K
Humans continually engage with an environment rich in potentially harmful chemicals. These are introduced to our bodies through inhalation, ingestion, or skin contact. These chemicals exist in various forms, such as air and environmental pollutants, agricultural chemicals, organic solvents, and heavy metals.
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...
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...
3.2K