相关实验视频
Updated: Feb 5, 2026
09:43
Methods to Test Endocrine Disruption in Drosophila melanogaster
Published on: July 3, 2019
10.3K
化学类子混合物查揭示了个性化人类血液POP混合物内分泌干扰的驱动因素
Denise Strand1, Paula Pierozan1, Luã Reis1
1Science for Life Laboratory, Department of Environmental Science, Stockholm University, Stockholm 114 18, Sweden.
Environmental science & technology
|February 3, 2026
概括
在复杂的环境化学混合物中识别有毒驱动因素是很困难的. perfluoroalkyl物质 (PFAS) 和有机农药 (OCP) 在人类血液样本中显著影响了的合成,这表明它们是毒性的关键驱动因素.
科学领域:
- 环境毒理学环境毒理学
- 内分泌干扰 干扰内分泌系统
- 人类健康风险评估评估 人类健康风险评估
背景情况:
- 环境化学混合物会在人体血液中引起相互作用性毒性.
- 在复杂的混合物中识别特定的毒性驱动因素仍然是一个重大挑战.
- 以前的研究表明,持久性有机污染物 (POPs) 的个性化混合物 (PMs) 对H295R细胞活力和类固醇生成具有独特的个体间影响.
研究的目的:
- 调查不同化学品类对个性化混合物 (PMs) 观察到的毒性的具体贡献.
- 在人类血液样本中识别主要的毒性驱动因子,这些毒性驱动因子对类固醇生成产生影响.
- 探索复杂混合物中不同化学品类之间的潜在对抗性相互作用.
主要方法:
- 测试含有 perfluoroalkyl 物质 (PFAS),有机农药 (OCP),多二 (PCB) 和多二乙烯 (PBDE) 的子混合物.
- 利用H295R细胞系来评估对类固醇生成 (和雌醇合成) 的影响.
- 扩展了测试,包括氧化应激分析和RT-qPCR用于基因表达 (CYP11A1).
主要成果:
- 低度和中度的PFAS和OCP亚混合物显著影响了丸激素合成,表明它们可能是主要的驱动因素.
- 一些亚混合物独特地改变了雌激醇和的水平,这表明化学类之间的对抗性相互作用.
- 在高度下观察到CYP11A1基因表达的下调,这表明抑制丸激素合成的反机制.
结论:
- PFAS和OCP可能是个性化混合物中对丸激素合成观察到的影响的关键驱动因素.
- 化学品类之间可能会发生敌对的相互作用,影响混合物的整体毒性.
- 涉及CYP11A1的反机制可能有助于在高化学度下抑制的合成.
相关概念视频
01:08Chemical Signaling in the Endocrine System
7.3K
A signaling cascade is a series of events that facilitates the transmission of information within or between cells, culminating in a targeted response in the recipient cell. As chemical messengers, hormones are pivotal in initiating and modulating these intricate signaling cascades based on their solubility.
Lipid-soluble hormones, such as steroid hormones, demonstrate an intracellular action. These hormones traverse cell membranes due to their lipid nature. Once inside the target cell, they...
Lipid-soluble hormones, such as steroid hormones, demonstrate an intracellular action. These hormones traverse cell membranes due to their lipid nature. Once inside the target cell, they...
7.3K
01:45Endocrine Signaling
68.1K
Endocrine cells produce hormones to communicate with remote target cells found in other organs. The hormone reaches these distant areas using the circulatory system. This exposes the whole organism to the hormone but only those cells expressing hormone receptors or target cells are affected. Thus, endocrine signaling induces slow responses from its target cells but these effects also last longer.
68.1K
03:27Mixtures of Acids
21.8K
The pH of a solution containing an acid can be determined using its acid dissociation constant and its initial concentration. If a solution contains two different acids, then its pH can be determined using one of several methods depending upon the relative strength of the acids and their dissociation constants.
A Mixture of a Strong Acid and a Weak Acid
In a mixture of a strong acid and a weak acid, the strong acid dissociates completely and becomes a source of almost all the hydronium ions...
A Mixture of a Strong Acid and a Weak Acid
In a mixture of a strong acid and a weak acid, the strong acid dissociates completely and becomes a source of almost all the hydronium ions...
21.8K
01:19Mixtures of Acids
1.1K
The pH of a solution containing an acid can be determined using its acid dissociation constant and initial concentration. If a solution contains two different acids, then its pH can be determined using one of several methods depending on the relative strength of the acids and their dissociation constants.
In a strong and weak acid mixture, the strong acid dissociates completely and becomes a source of almost all the hydronium ions present in the solution. In contrast, the weak acid shows...
In a strong and weak acid mixture, the strong acid dissociates completely and becomes a source of almost all the hydronium ions present in the solution. In contrast, the weak acid shows...
1.1K
00:46What is the Endocrine System?
420.7K
The endocrine system sends hormones—chemical signals—through the bloodstream to target cells—the cells the hormones selectively affect. These signals are produced in endocrine cells, secreted into the extracellular fluid, and then diffuse into the blood. Eventually, they diffuse out of the blood and bind to target cells which have specialized receptors to recognize the hormones.
420.7K
01:29The Endocrine System
1.4K
The endocrine system is an extensive network of glands – organs or tissues in the body that create chemicals that control many bodily functions, that secrete hormones, which are chemical messengers that play essential roles in regulating various bodily functions. These hormones are secreted into the bloodstream and travel throughout the body. They require specific receptors to convey signals to cells possessing these corresponding receptors. This complex signaling mechanism ensures that...
1.4K