一种系统毒理学方法涉及转录后调节网络在PFAS暴露后的生殖缺陷中
Abigail P Bline1, Hui Jiang2, Max Levenson1
1Molecular Toxicology Interdepartmental Program, UCLA, Los Angeles, CA. 90095.
概括
和多醇基物质 (PFAS) 通过破坏细胞液态结构,损害胚胎细胞的发育和功能. 这项对C. elegans的研究揭示了这些持久性环境化学物质的生殖毒性机制.
科学领域:
- 环境毒理学环境毒理学
- 发展生物学 发展生物学
- 分子毒理学 分子毒理学
背景情况:
- 和多醇基物质 (PFAS) 是持久性环境污染物,毒理学数据有限,特别是关于生殖细胞发育和未来生育能力的数据.
- 了解PFAS的生殖毒性至关重要,因为它们在环境和消费品中广泛存在.
研究的目的:
- 在生殖细胞发育过程中,比较遗留PFAS (PFOS) 和化以太类似物 (6:2 Cl-PFESA) 的生殖毒性.
- 通过使用Caenorhabditis elegans.来研究PFAS诱导的生殖毒性背后的分子机制.
主要方法:
- 对PFOS和6:2 Cl-PFESA对C. elegans生殖细胞数量,细胞亡和介质性进展的影响进行比较分析.
- 评估发育暴露成人的后代的胚胎死亡率.
- RNA测序 (mRNA和小RNA) 用于识别生殖系调节网络中的分子扰动.
主要成果:
- 暴露于PFOS和6:2Cl-PFESA都减少了生殖细胞数量,增加了生殖细胞线的亡,并引起了介质缺陷.
- 发育性暴露导致后代胚胎死亡率增加.
- 暴露于PFAS破坏了非编码RNA介导的生殖系调节和P颗粒,影响了RNA-蛋白质类液态凝结物.
- 在PFAS和突变突变突变突变突变之间观察到显著的基因环境相互作用,加剧了胚胎死亡率.
结论:
- 暴露于PFAS会对生殖细胞的发育和功能产生负面影响,导致生殖毒性.
- 类似液体的细胞凝聚物 (P颗粒,突触体复合物) 的破坏是PFAS生殖毒性的关键机制.
- PFAS的物理化学特性可能有助于其多样化的生物效应,突出显示需要进一步进行毒理学评估.
更多相关视频
04:39A Modified QuEChERS-HPLC Method for Detection of Polycyclic Aromatic Hydrocarbons in Zebrafish Embryos Exposed to Fine Particulate Matter
Published on: June 13, 2025
266
07:06Investigating Long-Distance Transport of Perfluoroalkyl Acids in Wheat via a Split-Root Exposure Technique
Published on: September 28, 2022
1.7K
相关概念视频
01:07Teratogenicity
2.8K
The ability of a drug to produce structural deformations and functional abnormalities in the developing embryo or the fetus is called teratogenicity, and the drug producing this effect is known as a teratogen. Teratogenic effects include stillbirth, miscarriage, intrauterine growth restriction, and neurocognitive delay. A teratogen may affect the embryo at different stages of development, which is important in determining the type and extent of the damage. During blastocyst formation, the early...
2.8K
01:26Toxic Reactions: Overview
1.2K
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,...
1.2K
01:36Types of Toxins
2.0K
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...
2.0K
01:25Mutagenicity and Carcinogenicity
1.4K
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...
1.4K