Toxicity in Takifugu rubripes exposed to acute ammonia: Effects on immune responses, brain neurotransmitter levels, and thyroid endocrine hormones
文献类型： 外文期刊
作者： Gao, Xiaoqiang 1 ; Wang, Xi 1 ; Wang, Xinyi 1 ; Fang, Yingying 1 ; Cao, Shuquan 1 ; Huang, Bin 1 ; Chen, Haibin 3 ; Xing, Rui 3 ; Liu, Baoliang 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Key Lab Sustainable Dev Marine Fisheries, Qingdao Key Lab Marine Fish Breeding & Biotechnol, Yellow Sea Fisheries Res Inst,Minist Educ, Qingdao 266071, Peoples R China
2.Ocean Univ, Coll Fisheries & Life Sci, Shanghai 201306, Peoples R China
3.Yuhai Hongqi Ocean Engn Co LTD, Rizhao 276800, Peoples R China
关键词： Ammonia exposure; Oxidative stress; Immunosuppression; Thyroid hormone; Brain monoamines; Takifugu rubripes
期刊名称：ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY （ 影响因子：7.129； 五年影响因子：7.284 ）
ISSN： 0147-6513
年卷期： 2022 年 244 卷
页码：
收录情况： SCI
摘要： Exposure to ammonia can cause convulsions, coma, and death. In this study, we investigate the effects of ammonia exposure on immunoregulatory and neuroendocrine changes in Takifugu rubripes. Fish were sampled at 0, 12, 24, 48, and 96 h following exposure to different ammonia concentrations (0, 5, 50, 100, and 150 mg/L). Our results showed that exposure to ammonia significantly reduced the concentrations of C3, C4, IgM, and LZM whereas the heat shock protein 70 and 90 levels significantly increased. In addition, the transcription levels of Mn-SOD, CAT, GRx, and GR in the liver were significantly upregulated following exposure to low ammonia concertation, however, downregulated with increased exposure time. These findings suggest that ammonia poisoning causes oxidative damage and suppresses plasma immunity. Ammonia exposure also resulted in the elevation and depletion of the T3 and T4 levels, respectively. Furthermore, ammonia stress induced an increase in the corticotrophin-releasing hormone, adrenocorticotropic hormone, and cortisol levels, and a decrease in dopamine, noradrenaline, and 5-hydroxytryptamine levels in the brain, illustrating that ammonia poisoning can disrupt the endocrine and neurotransmitter systems. Our results provide insights into the mechanisms underlying the neurotoxic effects of ammonia exposure, which helps to assess the ecological and environmental health risks of this contaminant in marine fish.
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