Ammonia toxicity in the yellow catfish (Pelteobagrus fulvidraco): The mechanistic insight from physiological detoxification to poisoning

被引:95
作者
Li, Ming [1 ]
Zhang, Muzi [1 ]
Qian, Yunxia [1 ]
Shi, Ge [2 ]
Wang, Rixin [1 ]
机构
[1] Ningbo Univ, Sch Marine Sci, Ningbo 315211, Peoples R China
[2] Zhejiang Ocean Univ, Coll Marine Sci, Zhoushan 16000, Peoples R China
基金
中国国家自然科学基金;
关键词
Ammonia; Detoxification; Poisoning; Oxidative stress; Pelteobagrus fulvidraco; OXIDATIVE STRESS; IMMUNE-RESPONSE; EXPOSURE; APOPTOSIS; GLUTAMINE; METABOLISM; TAURINE; BRAIN; UREA;
D O I
10.1016/j.fsi.2020.04.042
中图分类号
S9 [水产、渔业];
学科分类号
0908 ;
摘要
Ammonia is toxic to fishes. Different fish have different defense strategies against ammonia, so the mechanism of ammonia poisoning is different. In this study, yellow catfish were exposed to three levels of ammonia (0, 5.70 and 57.00 mg L-1) for 96 h. The results showed that ammonia poisoning could lead to free amino acid imbalance (ornithine and citrulline contents declined; arginine content elevated), urea cycle enzymes deficiency (carbamyl phosphate synthetase and arginase contents declined), oxidative stress (superoxide dismutase, catalase and glutathione peroxidase activities declined), immunosuppression (lysozyme activity, 50% hemolytic complement and total immunoglobulin contents and phagocytic index declined) and cytokines release (TNF, IL 1 and IL 8 contents elevated). In addition, ammonia poisoning could induce up-regulation of antioxidant enzymes (Cu/Zn-SOD, Mn-SOD, CAT and GPx), cytokines (TNF alpha, IL 1 and IL 8) and apoptosis (p53, Bax, cytochrome c, Caspase 3 and Caspase 9) genes transcription. This study suggesting that the urea cycle and glutamine synthesis both were involved in the ammonia detoxification of yellow catfish, and the immunosuppression, inflammation and apoptotic induced by ammonia poisoning in yellow catfish are related to oxidative stress.
引用
收藏
页码:195 / 202
页数:8
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