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Glutaredoxin 2 in the mud crab Scylla paramamosain: Identification and functional characterization under hypoxia and pathogen challenge

文献类型: 外文期刊

作者: Jie, Yu-Kun 1 ; Ma, Hong-Ling 1 ; Jiang, Jian-Jun 1 ; Cheng, Chang-Hong 1 ; Deng, Yi-Qin 1 ; Liu, Guang-Xin 1 ; Fan, Si-Gang 1 ; Guo, Zhi-Xun 1 ;

作者机构: 1.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Minist Agr & Rural Affairs, Key Lab South China Sea Fishery Resources Exploita, Guangzhou 510300, Guangdong, Peoples R China

2.Shanghai Ocean Univ, Natl Demonstrat Ctr Expt Fisheries Sci Educ, Shanghai Engn Res Ctr Aquaculture, Shanghai 201306, Peoples R China

关键词: Glutaredoxin 2; Scylla paramamosain; Pathogen challenge; Hypoxia; Reactive oxygen species

期刊名称:DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY ( 影响因子:2.9; 五年影响因子:3.1 )

ISSN: 0145-305X

年卷期: 2023 年 143 卷

页码:

收录情况: SCI

摘要: Glutaredoxin (Grx) is a glutathione-dependent oxidoreductase that plays a key role in antioxidant defense. In this study, a novel Grx2 gene (SpGrx2) was identified from the mud crab Scylla paramamosain, which consists of a 196 bp 5 & PRIME; untranslated region, a 357 bp open reading frame, and a 964 bp 3 & PRIME; untranslated region. The putative SpGrx2 protein has a typical single Grx domain with the active center sequence C-P-Y-C. The expression analysis revealed that the SpGrx2 mRNA was most abundant in the gill, followed by the stomach and hemocytes. Both mud crab dicistrovirus-1 and Vibrio parahaemolyticus infection as well as hypoxia could differentially induce the expression of SpGrx2. Furthermore, silencing SpGrx2 in vivo affected the expression of a series of antioxidant -related genes after hypoxia treatment. Additionally, SpGrx2 overexpression significantly increased the total antioxidant capacity of Drosophila Schneider 2 cells after hypoxia, resulting in a reduction of reactive oxygen species and malondialdehyde content. The subcellular localization results indicated that SpGrx2 was localized in both the cytoplasm and the nucleus of Drosophila Schneider 2 cells. These results indicate that SpGrx2 plays a crucial role as an antioxidant enzyme in the defense system of mud crabs against hypoxia and pathogen challenge.

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