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Immune response induced by major environmental pollutants through altering neutrophils in zebrafish larvae

文献类型： 外文期刊

作者： Xu, Hongyan 1 ; Zhang, Xiaoyan 2 ; Li, Hankun 2 ; Li, Caixia 2 ; Huo, Xiao-Jing 2 ; Hou, Li-Ping 4 ; Gong, Zhiyuan 2 ;

作者机构： 1.Chinese Acad Fishery Sci, Pearl River Fisheries Res Inst, Minist Agr, Key Lab Trop & Subtrop Fishery Resource Applicat, 1 Xingyu Rd, Guangzhou 510380, Guangdong, Peoples R China

2.Natl Univ Singapore, Dept Biol Sci, Singapore, Singapore

3.Yunnan Univ, Sch Life Sci, 2 North Cuihu Rd, Kunming 650091, Yunnan, Peoples R China

4.Guangzhou Univ, Sch Life Sci, Guangzhou 510655, Guangdong, Peoples R China

关键词： Immunotoxicity; Neutrophils quantification; Transgenic zebrafish; Organic chemicals; Metals

期刊名称：AQUATIC TOXICOLOGY （ 影响因子：4.964； 五年影响因子：5.071 ）

ISSN： 0166-445X

年卷期： 2018 年 201 卷

页码：

收录情况： SCI

摘要： Environmental pollutants may cause adverse effects on the immune system of aquatic organisms. However, the cellular effects of pollutants on fish immune system are largely unknown. Here, we exploited the transgenic zebrafish Tg(lysC:DsRed2) larva as a preliminary screening system to evaluate the potential inflammatory effects of environmental pollutants. Tg(lysC:DsRED2) larvae aged 7-day-postfertilization (7 dpf) were treated with selected environmental chemicals for 24 h (24 h) and the number of neutrophils were quantified using both image analysis and fluorescence activated cell sorting (FACS). We found that the numbers of neutrophils in the Tg (lysC:DsRED2) larvae were significantly increased by most of the organic chemicals tested, including E2 (17 beta-estradiol), BPA (Bisphenol-A), NDEA (N-nitrosodiethylamine), 4-NP (4-Nitrophenol) and Lindane (gamma-hexachlorocyclohexane). Neutrophil numbers were also increased by all the metals tested (Na2HAsO4 center dot 7H20, Pb (NO3)2, HgCl2, CdCl, CuSO4 center dot 5H(2)O, ZnSO4, and K2Cr2O7). The only exception was TCDD (2,3,7,8-tetra-chlorodibenzo-p-dioxin), which significantly reduced the number of neutrophils after exposure. Additionally, the transcription of genes (lyz, mpo, tnf alpha and il8) related to fish immune system were significantly modulated upon exposure to some of the selected chemicals such as E2, TCDD, Cu and Cd. This study revealed that representatives of major categories of environmental pollutants could cause an acute inflammatory response in zebrafish larvae as shown by alterations in the neutrophils, which may imply a common immunotoxicity mechanism for most environmental pollutants. This study has also demonstrated that Tgayz:DsRed2) transgenic zebrafish is an excellent tool for screening environmental chemicals with potential inflammatory effects through FACS-facilitated neutrophil counting.

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