相关实验视频
Updated: Jul 11, 2026

05:44
In vitro Cell Culture Model for Toxic Inhaled Chemical Testing
Published on: May 8, 2014
暴露于氧除草剂和类醇的工人癌症死亡率
R Saracci1, M Kogevinas, P A Bertazzi
1Unit of Analytical Epidemiology, International Agency for Research on Cancer, Lyon, France.
Lancet (London, England)
|October 26, 1991
概括
职业接触氧除草剂可能会增加癌症风险,特别是喷雾器中的软组织肉瘤. 需要进一步的研究来证实二氧化污染的关联和作用.
科学领域:
- 职业健康 职业健康 职业健康
- 流行病学 流行病学
- 毒理学 毒理学 毒理学
背景情况:
- 之前的研究表明,职业接触氧除草剂和增加癌症风险之间存在联系,包括软组织肉瘤和非霍奇金淋巴瘤.
- 这些除草剂被2,3,7,8-四二二氧化 (TCDD) 污染是一个潜在的问题.
研究的目的:
- 调查暴露于氧草杀虫剂的国际劳动者队列中的癌症死亡率.
- 评估职业除草剂暴露与特定癌症类型之间的关联,考虑潜在的TCDD污染.
主要方法:
- 一项历史上的队列研究,涉及来自10个国家的18910名生产工人和喷雾员.
- 通过问卷,记录和工作史来评估暴露;使用特定原因的国家死亡率进行死亡率分析以进行比较.
主要成果:
- 没有过度的全因死亡率,整体瘤,常见的上皮癌或淋巴瘤.
- 软组织肉瘤 (SMR196) 的统计学上非显著的两倍过度风险.
- 暴露后10-19年观察到软组织肉瘤的显著六倍过剩风险 (SMR 606),喷雾者中增加了九倍 (SMR 882). 根据小数量的数据,丸癌,甲状腺癌,内分泌癌和鼻癌的风险增加也被注意到.
结论:
- 在喷雾器中观察到的软组织瘤的过量与氧草药的潜在因果作用相一致.
- 过多的风险似乎与TCDD污染的除草剂没有具体联系,因此需要进一步调查其他暴露因素.
相关概念视频
Autoxidation of Ethers to Peroxides and Hydroperoxides
Ethers represent a class of chemical compounds that become more dangerous with prolonged storage because they tend to form explosive peroxides when standing in the air. Autoxidation is the spontaneous oxidation of a compound in air. In the presence of oxygen, ethers slowly oxidize to form hydroperoxides and dialkyl peroxides.
Effects of Chemicals: Overview
Drugs, encompassing various chemical compounds from natural sources, lab synthesis, or genetic engineering, elicit different biological responses in living organisms. Some of these responses are desirable or therapeutic, while others are undesirable. The primary goal of administering a drug is to achieve a therapeutic effect, that is, to address a specific disease or health condition. Any concurrent effects outside of this therapeutic outcome are considered undesirable. These undesirable...
Types of Toxins
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...
Toxic Reactions: Overview
When toxic substances penetrate the human body, they disseminate to various tissues, undergoing metabolic changes. This process yields reactive metabolites that may covalently bind with specific target molecules, resulting in toxicity.
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,...
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,...
Toxicity Testing in Animals
Toxicity tests in animals are grounded on two main assumptions: first, the effects observed in laboratory animals can be extrapolated to humans, especially when adjusted for body surface area; second, high-dose exposure in animals is essential to identify potential human hazards from lower doses. This is based on the quantal dose-response concept, which faces the challenge of extrapolating results from relatively few test animals to much larger human populations. For example, a 0.01% incidence...
Microbial Bioremediation of Pesticides
Pesticides often feature structurally complex chemical architectures, incorporating halogen groups and multiple aromatic rings. These characteristics confer high chemical stability, rendering many pesticides resistant to natural degradation processes. This resistance poses significant environmental concerns, as persistent pesticide residues can accumulate in ecosystems and affect non-target organisms.Despite the inherent stability of many pesticides, certain microorganisms possess the metabolic...

