共 74 条
Environmentally relevant concentrations of fenvalerate induces immunotoxicity and reduces pathogen resistance in Chinese rare minnow (Gobiocypris rarus)
被引:7
作者:
Zhang, Le
[1
,2
,3
]
Hong, Xiangsheng
[1
,2
]
Yan, Saihong
[1
,2
]
Zha, Jinmiao
[1
,2
,3
]
机构:
[1] Chinese Acad Sci, Res Ctr Eco Environm Sci, Key Lab Drinking Water Sci & Technol, Beijing 100085, Peoples R China
[2] Chinese Acad Sci, Beijing Key Lab Ind Wastewater Treatment & Reuse, Res Ctr Eco Environm Sci, Beijing 100085, Peoples R China
[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
基金:
中国国家自然科学基金;
关键词:
Pyrethroids;
Fish;
Histopathology;
Immune;
Resistance;
FRESH-WATER FISH;
ZEBRAFISH DANIO-RERIO;
TROUT ONCORHYNCHUS-MYKISS;
ALTERS INNATE IMMUNITY;
NILE TILAPIA;
PSEUDOMONAS-FLUORESCENS;
DISEASE SUSCEPTIBILITY;
AEROMONAS-HYDROPHILA;
OXIDATIVE STRESS;
DIETARY EXPOSURE;
D O I:
10.1016/j.scitotenv.2022.156347
中图分类号:
X [环境科学、安全科学];
学科分类号:
08 ;
0830 ;
摘要:
Fenvalerate is a broadly used type II pyrethroid with a potential toxic effect in fish. However, information on the immunotoxicity of fenvalerate in fish is scarce. Here, to discover the immunotoxicity of fenvalerate and its underlying mechanismin fish, adult Chinese rareminnowwas exposed to fenvalerate at 0, 0.3, 1, and 3 mu g/L for 28 days and then subjected to Pseudomonas fluorescens (P. fluorescens) challenge. Fenvalerate induced significant pathological changes, with disintegration of cell boundaries in the intestine, epithelial hyperplasia in gills, and vacuolation of hepatocytes at 3 mu g/L treatment. Additionally, the pathological characteristics were more serious during P. fluorescens infection after fenvalerate exposure. A significant increase in neutrophil counts was observed after 3 mu g/L fenvalerate exposure for 28 days (p < 0.05), whereas significantly increasedmonocyte and neutrophil counts and greatly decreased lymphocyte counts were detected at 24 h post-injection (hpi) with P. fluorescens (p < 0.05). Furthermore, obvious decreases in LYS, IgM, ALP, and C3 levels were detected in plasma after 3 mu g/L fenvalerate exposure for 28 days, which was consistent with the results at 24 and 48 hpi. Notably, fish exposed to fenvalerate suppressed the transcription of TLRNF-.B signaling pathway-relevant genes in response to P. fluorescens, accompanied by high mortalities and bacterial loads. Therefore, our results demonstrate that fenvalerate at environmentally relevant concentrations caused immunotoxicity in fish. This study highlights the importance of considering the combined effects of chemicals and pathogens to refine our ability to predict the effects of environmental contaminants on aquatic organisms.
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页数:9
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