在冰下面有什么? 加多如何影响Cyclops abyssorum在阿尔卑斯山的冬天
Alice Gabetti1, Camilla Mossotto2, Francesca Provenza3
1Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Torino 10154, Italy.
Environmental toxicology and pharmacology
|December 17, 2025
概括
来自医疗对比剂的加多 (Gd) 在阿尔卑斯山足动物中引起氧化应激. 这项研究强调了脆弱的淡水生态系统中适应寒冷的动物浮游生物的风险.
科学领域:
- 环境毒理学环境毒理学
- 生态毒理学 生态毒理学
- 淡水生态学 淡水生态
背景情况:
- 医学对比剂中人类产生的加多 (Gd) 释放量正在增加.
- 包括脆弱的高山湖泊在内的淡水生态系统中的二氧化碳污染是一个越来越令人担忧的问题.
- 阿尔卑斯山的湖泊由于极端条件而容易受到像Gd这样的污染物的影响.
研究的目的:
- 为了研究加多 (Gd) 对阿尔卑斯山脚动物Cyclops abyssorum的亚致命作用.
- 在与高山环境相关的模拟冬季条件下评估Gd诱导的氧化应激.
- 评估Gd对非模型动物浮游生物物种的生态毒理影响.
主要方法:
- 对Cyclops abyssorum暴露在环境相关的Gd度 (1-150μg/L) 中14天.
- 模拟冬季条件 (4°C,黑暗) 以模仿高山湖泊环境.
- 测量氧化应激生物标志物,包括谷氨过氧化酶,甲,超氧化物脱酶和谷氨S转移酶.
主要成果:
- 增加的谷氨过氧化酶活性和马隆迪阿尔海德水平与增加的Gd度,表明氧化应激和脂质过氧化.
- 超氧化物脱酶和谷氨S转移酶的非线性反应表明有生理值或酶抑制.
- 基于值的综合生物标志物响应 (IBR-T) 指数显示,在中等和高Gd暴露时,压力增加.
结论:
- 加多会在像Cyclops abyssorum这样适应寒冷的动物浮游生物中引发显著的氧化应激.
- 评估高山湖中的污染物风险需要考虑非模型物种和现实的暴露场景.
- 这些发现强调了医疗对比剂对敏感的淡水生态系统的潜在生态毒理影响.
相关概念视频
Global Climate Change
Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
Frost Action on Concrete
Concrete structures in cold climates, such as those along roadsides, can retain moisture. This moisture makes them susceptible to frost-related damage when temperatures fall below freezing. Adding moisture worsens the damage during temperature fluctuations, leading to repeated freezing and thawing. De-icing salts, spread over these structures to melt ice, add to the freeze-thaw cycle, and draw even more moisture into the concrete.
This freeze-thaw cycle primarily causes surface scaling, where...
This freeze-thaw cycle primarily causes surface scaling, where...


