Biotransformation of inorganic arsenic in a marine herbivorous fish Siganus fuscescens after dietborne exposure

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	Biotransformation of inorganic arsenic in a marine herbivorous fish Siganus fuscescens after dietborne exposure
	Zhang, Wei; Chen, Lizhao; Zhou, Yanyan; Wu, Yun; Zhang, Li
刊名	CHEMOSPHERE
	2016
卷号	147 页码:297-304
关键词	Arsenic Speciation Biotransformation Marine fish Herbivorous
通讯作者	Zhang, L (reprint author), Chinese Acad Sci, Key Lab Trop Marine Bioresources & Ecol, Guangdong Prov Key Lab Appl Marine Biol, South China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China.
中文摘要	Arsenic (As) is well known to be biodiminished along marine food chains. The marine herbivorous fish at a lower trophic level are expected to accumulate more As. However, little is known about how marine herbivorous fish biotransform the potential high As bioaccumulation. Therefore, the present study quantified the biotransformation of two inorganic As species (As(III) and As(V)) in a marine herbivorous fish Siganus fuscescens following dietborne exposure. The fish were fed on As contaminated artificial diets at nominal concentrations of 400 and 1500 mu g As(III) or As(V) g(-1) (dry weight) for 21 d and 42 d. After exposure, As concentrations in intestine, liver, and muscle tissues of rabbitfish increased significantly and were proportional to the inorganic As exposure concentrations. The present study demonstrated that both inorganic As(III) and As(V) in the dietborne phases were able to be biotransformed to the less toxic arsenobetaine (AsB) (63.3-913% in liver; 79.0%-95.2% in muscle). The processes of As biotransformation in rabbitfish could include oxidation of As(III) to As(V), reduction of As(V) to As(III), methylation to monomethylarsonic acid (MMA) and dimethylarsinic acid (DMA), and subsequent conversion to AsB. These results also demonstrated that AsB synthesis processes were diverse facing different inorganic As species in different tissues. In summary, the present study elucidated that marine herbivorous fish had high ability to biotransform inorganic As to the organic forms (mainly AsB), resulting in high As bioaccumulation. Therefore, marine herbivorous fish could detoxify inorganic As in the natural environment. (C) 2015 Elsevier Ltd. All rights reserved.
学科主题	Environmental Sciences & Ecology
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/15493]
专题	南海海洋研究所_中科院海洋生物资源可持续利用重点实验室
推荐引用方式 GB/T 7714	Zhang, Wei,Chen, Lizhao,Zhou, Yanyan,et al. Biotransformation of inorganic arsenic in a marine herbivorous fish Siganus fuscescens after dietborne exposure[J]. CHEMOSPHERE,2016,147:297-304.
APA	Zhang, Wei,Chen, Lizhao,Zhou, Yanyan,Wu, Yun,&Zhang, Li.(2016).Biotransformation of inorganic arsenic in a marine herbivorous fish Siganus fuscescens after dietborne exposure.CHEMOSPHERE,147,297-304.
MLA	Zhang, Wei,et al."Biotransformation of inorganic arsenic in a marine herbivorous fish Siganus fuscescens after dietborne exposure".CHEMOSPHERE 147(2016):297-304.