The role of Mu-type glutathione S-transferase in the mud crab (Scylla paramamosain) during ammonia stress
文献类型： 外文期刊
作者： Cheng, Chang-Hong 1 ; Ma, Hong-Ling 1 ; Deng, Yi-Qin 1 ; Feng, Juan 1 ; Chen, Xiao-Long 1 ; Guo, Zhi-Xun 1 ;
作者机构： 1.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Key Lab South China Sea Fishery Resources Exploit, Key Lab Aquat Prod Proc,Minist Agr, Guangzhou 510300, Guangdong, Peoples R China
关键词： Scylla paramamosain; Ammonia stress; Oxidative stress; Glutathione S-transferase
期刊名称：COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY C-TOXICOLOGY & PHARMACOLOGY （ 影响因子：3.228； 五年影响因子：3.289 ）
ISSN： 1532-0456
年卷期： 2020 年 227 卷
页码：
收录情况： SCI
摘要： Glutathione S-transferase (GST) plays important roles in cellular detoxification and antioxidant defense. A Mu-type glutathione S-transferase (designated as SpMu-GST) was obtained from the mud crab Scylla paramamosain. The open reading frame of SpMu-GST was comprised a 690 bp, which encoded a putative protein of 229 amino acids. Quantitative real-time PCR (qRT-PCR) revealed that the SpMu-GST mRNA was expressed in all examined tissues, with highest expression in hepatopancreas. During ammonia exposure, the SpMu-GST transcriptions in hepatopancreas and gill were significantly up-regulated at early exposure time. Moreover, RNA interference (RNAi) experiment was designed to understand the roles of SpMu-GST under ammonia exposure. Ammonia exposure reduced the levels of glutathione S-transferase (GST), superoxide dismutase (SOD), catalase (CAT) and total antioxidative capacity (T-AOC), and increased the formation of malondialdehyde (MDA). After knockdown of the SpMu-GST level, GST activity and T-AOC were significantly decreased at some exposure time after ammonia exposure. However, the mortality of mud crabs and malondialdehyde (MDA) contents significantly increased under ammonia exposure. These results further suggested that SpMu-GST played a critical role in mud crab antioxidant defenses in response to environmental stress.
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