在多壁碳纳米管 (MWCNTs) 应力下对Daphnia magna的毒性和转录组测序分析
Jiaqi Shen1, Zhenyang Zhang1, Xudong Zheng2
1School of Animal Science and Technology, Henan University of Science and Technology, Luoyang, 471003, China.
概括
暴露于多壁碳纳米管 (MWCNTs) 引起了大夫尼亚大的氧化应激和消化问题. 这些发现凸显了动力电池行业MWCNT的环境风险.
科学领域:
- 环境毒理学环境毒理学
- 生态毒理学 生态毒理学
- 纳米材料的安全性
背景情况:
- 扩张的动力电池行业引发了人们对碳纳米管 (CNTs) 潜在的环境污染的担忧.
- 了解多壁碳纳米管 (MWCNTs) 的生态毒性对于评估环境风险至关重要.
- 大 (Daphnia magna) 作为评估水生生态系统健康状况的重要模型生物.
研究的目的:
- 调查MWCNTs对大方氏菌的抗氧化能力,消化功能和转录组的毒性影响.
- 为了确定MWCNTs在这个水生模型生物体中的剂量依赖性毒性.
- 阐明了MWCNT诱导的多夫尼亚大的毒性背后的分子机制.
主要方法:
- 大夫尼亚大被暴露在不同度的MWCNT (0,0.53和5.3毫克/升) 中48小时.
- 通过含量和酶活性 (超氧化物脱酶,酶,谷氨) 评估抗氧化能力.
- 测量了消化酶活动 (脂酶,素,氨酶) 并进行了KEGG转录组分析.
主要成果:
- 暴露在5.3mg/L的MWCNT引起了显著的氧化应激,由增加的甲基和减少的抗氧化酶活动表明.
- 在最高MWCNT度下,消化酶活动 (脂酶,素,氨酶) 显著降低.
- MWCNTs破坏了异生代谢 (cytochrome P450) 和脂肪酸延长通路;较高度也影响了蛋白质的消化和吸收.
结论:
- MWCNTs诱导氧化损伤,并损害大夫尼亚大的排毒功能.
- 蛋白质和脂质代谢的干扰是水生生物中MWCNT毒性的关键机制.
- 该研究强调了MWCNTs的潜在生态危害,需要谨慎的环境管理.
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