暴露于后斑马鱼眼中的氧化应激和多化
Anna Rita Bianchi1, Valeria Guerretti1, Alessandra La Pietra1
1Department of Biology, University of Naples Federico II, Via Cinthia, 21, 80126 Naples, Italy.
Biomolecules
|August 28, 2025
概括
暴露会导致斑马鱼眼中的氧化应激和DNA损伤. 随着时间的推移,眼细胞适应毒性,可能是预防细胞死亡的生存机制.
科学领域:
- 环境毒理学
- 水生毒理学
- 分子生物学
背景情况:
- 是一种常见的环境污染物.
- 在水生生物中诱导氧化应激和遗传毒性.
- 对视觉系统的分子作用尚不清楚.
研究的目的:
- 研究对斑马鱼眼组织的氧化和遗传毒性作用.
- 评估抗氧化剂和DNA修复酶对暴露的作用.
- 了解眼睛中毒性的细胞适应机制.
主要方法:
- 成年斑马鱼在10,15和20天内暴露在11mg/L的中.
- 测量了眼睛上游剂中超氧化物脱酶 (SOD) 和酶 (CAT) 的活性.
- 在眼组织同质体中评估了多 (ADP-ribose) 聚合酶 (PARP) 和多 (ADP-ribose) 糖酶 (PARG) 的活性.
- 使用薄层染色法证实PARG在PAR循环中的作用.
主要成果:
- 暴露增加了活性氧物种 (ROS) 和诱导氧化应激.
- 抗氧化酶 (SOD,CAT) 和DNA修复酶 (PARP,PARG) 的活性发生变化.
- 在短时间暴露期间PARP活性显著增加表明氧化DNA损伤.
- 随着更长的暴露时间,PARP活性恢复到基线,这表明细胞适应.
- PARG证实其在聚 (ADP- 核糖) (PAR) 分解中的作用.
结论:
- 斑马鱼的眼细胞对暴露有氧化和基因毒性反应.
- 酶活性变化表明细胞试图抵消引起的损伤.
- 适应毒性可能涉及降低PARP活性作为生存策略.
- 聚 (ADP- 核糖) 循环是动态调节的,可以防止帕尔塔纳托斯 (编程性亡).
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