暴露场景对咖啡因敏感性的影响
Niedja Santos1, Miguel Oliveira2, Inês Domingues2
1Centre for Environmental and Marine Studies (CESAM), Department of Biology, University of Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal. santos.niedja@ua.pt.
Environmental science and pollution research international
|November 17, 2023
概括
咖啡因 (CAF) 在化后对鱼幼虫更有毒,因为保护性胆会限制化学物质的吸收. 化胚胎更敏感,这表明它们在毒性测试中用于更短,更具成本效益的研究.
科学领域:
- 环境毒理学环境毒理学
- 发展生物学 发展生物学
- 药理学 药理学是指药理学的学科.
背景情况:
- 鱼胚胎的胆管作为一个屏障,影响化学物质的吸收和毒性评估.
- 了解脱化对化学敏感性的影响对于准确的生态毒理学评估至关重要.
研究的目的:
- 评估咖啡因 (CAF) 在不同暴露场景下对鱼类胚胎和幼虫的影响,考虑到胆的存在或不存在.
- 为了确定鱼类对CAF暴露的阶段敏感性,并评估净化后的恢复.
主要方法:
- 鱼类胚胎在不同发育阶段 (与胆管,化胚胎/幼虫) 暴露于不同度的CAF (0-100 mg.L-1).
- 评估的终点包括心率,能量储备 (碳水化合物),行为 (移动的总距离,不规则的运动) 和乙胆酶 (AChE) 活性.
- 暴露后进行了为期10天的净化期,随后进行了行为和ACHE活动评估.
主要成果:
- 咖啡因暴露会影响心率和减少碳水化合物储备,以剂量依赖的方式.
- CAF抑制了ACHE活动并改变了鱼类的行为,化胚胎 (2dE) 显示出更高的灵敏度.
- 在净化后观察到行为恢复,但在某些场景中,ACHE抑制仍然存在.
结论:
- 胆显著影响CAF的毒性;脱胆的胚胎/幼虫表现出增加的敏感性.
- 化胚胎对CAF更敏感,支持在效率和成本效益方面的毒性测试中使用它们.
- 建议使用化胚胎进行毒性测试,以评估具有有限胆管透性的物质,如纳米材料.
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