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The role of intestinal microbiota of the marine fish (Acanthopagrus latus) in mercury biotransformation

文献类型： 外文期刊

作者： Yang, Tao-Tao 1 ; Liu, Yong 2 ; Tan, Sha 3 ; Wang, Wen-Xiong 5 ; Wang, Xun 1 ;

作者机构： 1.South China Agr Univ, Coll Marine Sci, Joint Lab Guangdong Prov & Hong Kong Reg Marine B, Guangzhou 510642, Peoples R China

2.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Key Lab South China Sea Fishery Resources Exploit, Minist Agr & Rural Affairs, Guangzhou 510300, Peoples R China

3.Sun Yat Sen Univ, Sch Life Sci, State Key Lab Biocontrol, Guangzhou 510275, Peoples R China

4.Sun Yat Sen Univ, Sch Life Sci, Guangdong Prov Key Lab Plant Resource, Guangzhou 510275, Peoples R China

5.City Univ Hong Kong, Sch Energy & Environm, State Key Lab Marine Pollut, Kowloon, Hong Kong, Peoples R China

6.City Univ Hong Kong, Res Ctr Oceans & Human Hlth, Shenzhen Res Inst, Shenzhen 518057, Peoples R China

关键词： Mercury; Fish; Methylation; Demethylation; Intestinal microbiota

期刊名称：ENVIRONMENTAL POLLUTION （ 影响因子：6.792； 五年影响因子：6.939 ）

ISSN： 0269-7491

年卷期： 2021 年 277 卷

页码：

收录情况： SCI

摘要： Both inorganic (IHg) and organic (MeHg) forms of Hg can be converted into each other by methylation or demethylation, leading to changes of Hg speciation and distribution in fish. However, Hg biotransformation in fish is not thoroughly understood and the key factors in this process are unclear. The present study investigated the in vivo Hg transformation in a marine fish (Acanthopagrus latus) and explored the roles of intestinal microbiota in Hg biotransformation. We first demonstrated that Hg methylation or demethylation occurred in the fish gut under dietary IHg or MeHg exposure, respectively. The demethylation was observed to be faster than methylation, suggesting that demethylation could significantly influence the Hg speciation in fish. This study also strongly suggested that intestinal microbiota played a predominant role in Hg biotransformation and thus significantly affected the overall Hg accumulation and distribution in fish body. The richness of Hg methylators or demethylators was elevated under IHg or MeHg treatment, respectively. Furthermore, the intestinal microbiota composition was also altered by Hg exposure. This study highlights the importance of intestinal microbiota in Hg biotransformation in fish body, and suggests that modulating the gut microbiome could be a possible solution to minimize Hg contamination in fish. (C) 2021 Elsevier Ltd. All rights reserved.

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