基于煤炭的碳点纳米材料的制备和生物毒性
Zhenzhou Tian1, Jinyao Li1, Yanming Miao1
1School of Life Science, Shanxi Normal University, Taiyuan 030006, China.
Nanomaterials (Basel, Switzerland)
|December 22, 2023
概括
基于煤的碳点 (C-CDs) 对生物体表现出多种影响. 虽然低度可能有利于小麦,但高剂量和紫外线暴露会增加C-CD毒性,特别是通过单点氧生成.
科学领域:
- 纳米材料科学 科学 纳米材料科学
- 环境毒理学环境毒理学
- 生物化学 生物化学
背景情况:
- 基于煤炭的碳点 (C-CDs) 由于可获得的来源和较低的生产成本,越来越多地进行研究.
- 对C-CDs的生物毒性有全面的了解,对于它们的安全应用至关重要.
- 目前关于C-CDs在各种生物体中的毒性水平和机制的知识仍然有限.
研究的目的:
- 系统地研究C-CD纳米材料对植物,细菌和动物细胞的生物毒性作用.
- 探索C-CD毒性的潜在机制,包括它们的光催化氧化特性.
- 通过评估它们在不同生物系统中的影响,为安全使用C-CDs奠定基础.
主要方法:
- 暴露小麦 (植物细胞),黄金菌 (细菌细胞) 和HeLa细胞 (动物细胞) 在不同度的C-CDs.
- 评估小麦的生长指标和细菌和动物细胞的活力.
- 在紫外线 (365nm) 照射下调查C-CDs的光催化活性,并分析反应性氧物种的产生,特别是单片氧 (O2).
主要成果:
- 低度的C-CD促进了小麦的生长,而高度则表现出显著的抑制作用.
- 在C-CD中,对*S. aureus*有度依赖和与光相关的毒性.
- 在1-5000μg/mL C-CDs时,HeLa细胞显示出最小的毒性,但紫外线照射通过单点氧生成诱导了毒性.
结论:
- C-CDs表现出剂量依赖的和特定于环境的生物效应.
- 紫外线下的光催化活性通过产生单片氧显著增强了C-CD毒性.
- 了解这些毒性机制对于安全开发和应用以煤为基础的碳点至关重要.
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