使用蚊子作为测试模型对氧化纳米颗粒的基因毒性评估
Kanwaljit Kaur Ahluwalia1, Kritika Thakur1, Amrik Singh Ahluwalia2
1Department of Zoology, Akal College of Basic Sciences, Eternal University, Baru Sahib, Himachal Pradesh 173101, India.
Toxics
|November 24, 2023
概括
氧化纳米颗粒 (ZnO NPs) 在蚊子 (Culex quinquefaciatus) 中引起显著的遗传损伤,影响染色体和精子. 这种基因毒性会影响生殖和胚胎发育,这表明ZnO NP对环境并不完全安全.
科学领域:
- 环境毒理学环境毒理学
- 纳米粒子安全性评估评估
- 遗传学和分子生物学 遗传学和分子生物学
背景情况:
- 氧化物纳米颗粒 (ZnO NPs) 的广泛使用引发了对环境释放的担忧.
- 对于纳米颗粒的毒理和环境影响,公众存在担忧.
- 有限的数据存在于动物模型中纳米颗粒的基因毒性.
研究的目的:
- 为了评估氧化纳米颗粒 (ZnO NPs) 的基因毒性.
- 评估 ZnO NPs 对蚊子 Culex quinquefaciatus 的遗传物质的影响.
主要方法:
- 通过Probit分析确定了Culex quinquefaciatus幼虫的ZnO NP的LD20.
- 暴露于ZnO NPs的第四阶级幼虫,并分析了成年性腺体的染色体异常.
- 评估精子头部异常,生殖潜力,胚胎发育和主要致命突变.
主要成果:
- 在暴露于ZnO NP的蚊子中观察到统计学上显著的染色体异常 (结构和数值).
- 精子头形状的异常,卵尺寸的减少,以及每的卵数量减少.
- 未化卵的频率增加表明存在主导致命突变,与对照组有显著的统计差异 (p < 0.05).
结论:
- 在Culex quinquefaciatus中,ZnO NPs具有基因毒性潜力,诱导染色体损伤并影响生殖健康.
- 在多项测试中观察到的异常表明,ZnO NPs不能被认为是绝对安全的.
- 强调迫切需要针对纳米颗粒污染的环境保护战略.
相关概念视频
01:16In-vitro Mutagenesis
To learn more about the function of a gene, researchers can observe what happens when the gene is inactivated or “knocked out,” by creating genetically engineered knockout animals. Knockout mice have been particularly useful as models for human diseases such as cancer, Parkinson’s disease, and diabetes.
01:16In vitro Mutagenesis
To learn more about the function of a gene, researchers can observe what happens when the gene is inactivated or “knocked out,” by creating genetically engineered knockout animals. Knockout mice have been particularly useful as models for human diseases such as cancer, Parkinson’s disease, and diabetes.