吸入的microcystin-LR可能会通过肝脏拥堵诱导急性肝功能衰竭
Wonkyun Jung1, Mi-Jin Yang2, Su-Hyeon Jo1
1Department of Biomedical Science, College of Medicine, Kyung Hee University, Seoul, Republic of Korea; Medical Research Center for Bioreaction to Reactive Oxygen Species and Biomedical Science Institute, Core Research Institute, Kyung Hee University, Seoul, Republic of Korea.
Ecotoxicology and environmental safety
|November 9, 2025
概括
吸入的微囊素-氨酸-氨酸 (MC-LR) 毒素来自蓝色细菌的开花是一个日益增长的公共卫生风险. 研究表明,MC-LR在小鼠中引起肝毒性和潜在死亡,可接受的吸入剂量可能低于10μg/kg.
科学领域:
- 环境健康 环境健康
- 毒理学 毒理学 毒理学
- 公共卫生 公共卫生
背景情况:
- 气候变化正在增加蓝藻细菌的繁殖,导致环境对微素-氨酸-氨酸 (MC-LR) 的暴露越来越大.
- MC-LR是一种由蓝菌产生的强毒素,由于人类潜在的暴露途径,它对公众健康造成了重大关注.
研究的目的:
- 在小鼠模型中研究吸入微囊素-氨酸-氨酸 (MC-LR) 的健康影响和毒性.
- 确定MC-LR在通气道上皮质及其目标器官的转移潜力.
- 为了确定MC-LR的潜在可接受的吸入剂量.
主要方法:
- 对雄性和雌性小鼠,MC-LR被注射入鼻,剂量各不相同.
- 监测老鼠的死亡率,临床症状和病理变化.
- 分析了肺和肝组织的炎症,MC-LR的存在和基因表达变化.
- 用一个3D人体气道模型来评估MC-LR转位.
主要成果:
- 吸入的MC-LR在小鼠中引起了剂量依赖的死亡率,雌性显示出更高的敏感性.
- 在受影响的小鼠中观察到严重的肝堵塞和肝毒性.
- 在暴露后2小时内,在肝脏组织中检测到MC-LR,并在呼吸道上皮上转移.
- 肝脏基因表达发生显著变化,包括ATF3和NR4A1的上调和miR-122的下调.
结论:
- 吸入的MC-LR诱导肝脏特异性毒性,主要通过肝脏拥堵.
- 建议MC-LR可接受的吸入剂量低于10μg/kg.
- 由于水污染的增加,对长期暴露于MC-LR环境度的进一步研究是有必要的.
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