微囊藻毒素
微囊藻毒素
神经毒性
血脑屏障
星形胶质细胞
炎症
神经炎症
蓝毒素
化学
毒素
基质金属蛋白酶
药理学
小胶质细胞
蓝藻
生物
中枢神经系统
免疫学
毒性
细菌
生物化学
内分泌学
有机化学
遗传学
作者
Jing Wang,Changliang Zhang,Jing Zhu,Jie Ding,Yabing Chen,Xiaodong Han
标识
DOI:10.1016/j.scitotenv.2019.06.387
摘要
Microcystin-leucine-arginine (MC-LR), which produced by toxic cyanobacteria and widely present in eutrophic waters, has been shown to have potent acute hepatotoxicity. MC-LR has been revealed to inflict damage to brain, while the neurotoxicity of chronic exposure to MC-LR and mechanisms underlying it are still confusing. Here, the mice were exposed to MC-LR dissolved in drinking water at dose of 1, 7.5, 15, and 30 μg/L for consecutive 180 days. MC-LR accumulated in mouse brains and impaired the blood-brain barrier by inducing the expression of matrix metalloproteinase-8 (MMP-8), which was regulated by NF-κB, c-Fos and c-Jun. Furthermore, MC-LR exposure induced microglial and astrocyte activation and resultant neuroinflammatory response. This study highlights the risks to human health of the current microcystin exposure.
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