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Transcriptomic analysis reveals the genes involved in tetrodotoxin (TTX) accumulation, translocation, and detoxification in the pufferfish Takifugu rubripes

文献类型： 外文期刊

作者： Zhang, Hanyuan 1 ; Li, Peizhen 1 ; Wu, Biyin 1 ; Hou, Jilun 2 ; Ren, Jiangong 2 ; Zhu, Youxiu 1 ; Xu, Jian 1 ; Si, Fei 2 ; Sun, Zhaohui 2 ; Liu, Xia 2 ;

作者机构： 1.Chinese Acad Fishery Sci, Key Lab Aquat Genom, Beijing Key Lab Fishery Biotechnol, Minist Agr & Rural Affairs, Beijing 100141, Peoples R China

2.Chinese Acad Fishery Sci, Beidaihe Cent Expt Stn, Qinhuangdao 066100, Hebei, Peoples R China

关键词： Tetrodotoxin (TTX); Pufferfish; Takifugu rubripes; Differentially expressed genes (DEGs); Gene regulation

期刊名称：CHEMOSPHERE （ 影响因子：8.943； 五年影响因子：8.52 ）

ISSN： 0045-6535

年卷期： 2022 年 303 卷

页码：

收录情况： SCI

摘要： Tetrodotoxin (TTX) is a potent marine neurotoxin that exists in a variety of aquatic and terrestrial organisms. Pufferfish in different habitats show great variation in their TTX contents. Exploring the genes involved in TTX metabolism could contribute to our understanding of the molecular mechanisms underlying TTX accumulation, translocation, and detoxification in pufferfish. In this study, transcriptomic analysis was used to identify the functional genes related to TTX metabolism in the blood, liver, and muscle of the toxic and non-toxic tiger puffer (Takifugu rubripes). A total of 6101 differentially expressed genes (DEGs) were obtained after transcriptomic analysis; of these, 2401 were identified in the blood, 2262 in the liver, and 1438 in the muscle. After enrichment analysis, fourteen genes encoding glutathione S-transferases (GSTs), glutathione peroxidase (GPx), thioredoxins (TXNs), superoxide dismutase (SOD), ATP-binding cassettes (ABCs), apolipoproteins (APOs), inhibitors of apoptosis protein (IAP), and solute carrier (SLC), which are mainly antioxidant enzymes, membrane transporters, or anti-apoptotic factors, were revealed in the blood. Thirty-six genes encoding SLCs, ABCs, long-chain-fatty-acid-CoA ligases (ACSLs), interleukin 6 cytokine family signal transducer (IL6ST), endoplasmic reticulum (ER), and heat shock protein family A (Hsp70) were involved in transmembrane transporter activity and innate immune response. Notably, a large number of slc genes were found to play critical and diverse roles in TTX accumulation and translocation in the liver of T. rubripes. Nine genes from the slc, hsp70, complement C5 (c5), acsl, er, and serpin peptidase inhibitor (serpin) gene families were found to participate in the regulation of protein processing and anti-apoptosis. These results reflect the diverse functions of genes closely related to TTX accumulation, translocation, and detoxification in T. rubripes.

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