Probiotic Lactobacillus rhamnosus alleviates the neurotoxicity of microcystin-LR in zebrafish (Danio rerio) through the gut-brain axis

文献类型： 外文期刊

第一作者： Luan, Ning

作者： Luan, Ning;Zuo, Junli;Niu, Qianping;Liu, Haoling;Wang, Guoao;Ma, Xufa;Qin, Jianhui;Li, Guangyu;Yan, Wei;Hung, Tien-Chieh;Wu, Qin;Deng, Ping

作者机构：

关键词： MCLR; Probiotic; Neurotransmitter; Gut-brain axis; HPI axis

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：9.8； 五年影响因子：9.6 ）

ISSN： 0048-9697

年卷期： 2024 年 908 卷

页码：

收录情况： SCI

摘要： Microcystin-LR (MCLR) is one of the most toxic cyanobacterial toxins and is harmful to the central nervous system of fish. Probiotic additives can improve neuroendocrine function in fish. Although both MCLR and probiotics aim at the nervous system, whether they interact with each other and the mechanisms remain un-explored. In the present study, 4-month-old zebrafish were exposed to 0, 2.2, and 22 mu g/L of MCLR for 28 days with or without the probiotic L. rhamnosus. We found that MCLR exposure could inhibit the swimming speed of zebrafish, while the presence of L. rhamnosus mitigated this abnormality. To elucidate the mechanism of how L. rhamnosus alleviates MCLR-induced neurotoxicity, we examined the bioaccumulation of MCLR, changes in neurotransmitters, immune biochemical indicators, and hormone content of the hypothalamic-pituitary-interrenal (HPI) axis in zebrafish along the gut-brain axis. Our results showed L. rhamnosus could reverse the abnormal swimming behavior and eventually alleviate neurotoxicity in zebrafish by modulating intestinal and brain neural signaling, neuroinflammation, and HPI axis responses. This study provides implications for the application of probiotics in the aquaculture industry.

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