变革性的纳米生物塑料效应:在水生生物模型中塑料银纳米颗粒的毒理影响
Lucas G Queiroz1, Leandro A Faustino1, Paulo F M de Oliveira1
1Instituto de Química, Universidade de São Paulo, Prof. Lineu Prestes Avenue 748, 05508-900 São Paulo, SP, Brazil.
The Science of the total environment
|September 29, 2024
概括
光激发的银纳米粒子 (AgNPs) 对Daphnia similis的毒性增加,影响了生存和生理学. 这突显了等离子纳米材料的环境风险,但也表明了基于光的疗法的潜力.
科学领域:
- 环境科学 环境科学
- 纳米技术纳米技术
- 生态毒理学 生态毒理学
背景情况:
- 银纳米粒子 (AgNPs) 具有独特的局部表面等离子体共振 (LSPR) 特性.
- AgNP越来越多地用于各种应用,导致环境释放到水生系统.
- 了解AgNP在自然光等环境条件下的生态毒性至关重要.
研究的目的:
- 在LSPR条件下调查AgNPs对达芬尼亚的毒性影响,以模拟LSPR条件下的生存和生理.
- 为了比较球形和三角形AgNP与不同LSPR频段的毒性.
- 评估光诱导等离子体激发对AgNP毒性的影响.
主要方法:
- 达芬尼亚仿真菌暴露于不同度的球形和三角形AgNP.
- 在五种不同的光条件下进行化,包括黑暗和诱导LSPR的条件.
- 对氧化应激和脂质储存的生存率和酶生物标志物的评估.
主要成果:
- 在LSPR条件下AgNPs显著增加了相比黑暗条件 (2.6x为球形,1.7x为三角形) 的达芬尼亚死亡率.
- 在LSPR下进行的血治疗诱导了生理反应,对两种AgNP形状的酶活性显著降低.
- 球形AgNP的LC50值低于三角AgNP,表明毒性更高.
结论:
- 激发LSPR的AgNP可以增强毒性,并诱导与氧化应激和水生生物的生存相关的生物反应.
- 塑活性纳米材料对环境的污染,由于光增强毒性,造成潜在的风险.
- 这些发现表明,尽管存在环境问题,但使用AgNP的基于光的疗法仍然具有潜在的应用.
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