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Protective role of medium-concentration selenium nanoparticles against high salinity-induced oxidative stress in Crassostrea hongkongensis gills and hepatopancreas

文献类型： 外文期刊

作者： Lu, Yuchen 1 ; Li, Hongyan 2 ; Lu, Jie 2 ; Yao, Tuo 2 ; Fu, Shengli 2 ; Wang, Qingheng 1 ; Ye, Lingtong 5 ;

作者机构： 1.Guangdong Ocean Univ, Coll Fisheries, Zhanjiang 524088, Guangdong, Peoples R China

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

3.Dalian Ocean Univ, Coll Fisheries & Life Sci, Dalian 116023, Peoples R China

4.Sanya Trop Fisheries Res Inst, Sanya 572426, Peoples R China

5.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Key Lab Aquat Prod Proc, Minist Agr & Rural Affairs, Guangzhou 510300, Peoples R China

关键词： Nano-selenium; Crassostrea hongkongensis; High salinity stress; Antioxidant defense; Metabolic regulation; Tissue-specific response

期刊名称：MARINE POLLUTION BULLETIN （ 影响因子：4.9； 五年影响因子：5.6 ）

ISSN： 0025-326X

年卷期： 2025 年 215 卷

页码：

收录情况： SCI

摘要： This study investigated the effects of selenium nanoparticles (Se NPs) on the physiological responses of Crassostrea hongkongensis during high salinity exposure, which threatens this commercially important species. Oysters were pretreated with Se NPs (0, 0.4, 4, and 40 mu g/L) for 14 days, followed by high salinity (30 psu) exposure for 7 days. Antioxidant, metabolic, and immune parameters were analyzed in gill and hepatopancreas tissues. Results revealed tissue-specific responses to Se NPs under salinity stress, with medium concentrations (4 mu g/L) showing significant protective effects. In gills, medium Se NPs enhanced selenium-dependent antioxidant systems (glutathione peroxidase, GSH-PX and glutathione S-transferase, GST) and regulated metabolic enzymes (acid phosphatase, ACP; alanine aminotransferase, ALT; aspartate aminotransferase, AST). The hepatopancreas demonstrated increased antioxidant capacity (decreased malondialdehyde, MDA; increased superoxide dismutase, SOD) and metabolic adaptations (increased ALT). High Se NPs concentrations (40 mu g/L) exacerbated physiological stress. These findings advance our understanding of nanomaterial-environment interactions with aquaculture implications.

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