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Toxic effects of microplastics and nitrite exposure on intestinal histology, digestion, immunity, and microbial community of shrimp Litopenaeus vannamei

文献类型： 外文期刊

作者： Xing, Yi-fu 1 ; Zhu, Xuan-yi 1 ; Huang, Jian-hua 3 ; Nan, Yu-xiu 1 ; Duan, Ya-fei 1 ; Zhang, Jia-song 1 ;

作者机构： 1.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Key Lab South China Sea Fishery Resources Exploita, Guangdong Prov Key Lab Fishery Ecol & Environm, Guangzhou 510300, Peoples R China

2.Sanya Trop Fisheries Res Inst, Key Lab Efficient Utilizat & Proc Marine Fishery R, Sanya 572000, Peoples R China

3.Chinese Acad Fishery Sci, Shenzhen Base South China Sea Fisheries Res Inst, Shenzhen 518116, Peoples R China

关键词： Litopenaeus vannamei; Shrimp; Nitrite; Microplastics; Intestinal health; Physiological function

期刊名称：MARINE POLLUTION BULLETIN （ 影响因子：5.8； 五年影响因子：6.5 ）

ISSN： 0025-326X

年卷期： 2024 年 200 卷

页码：

收录情况： SCI

摘要： Nitrite and microplastics (MPs) are environmental pollutants that threaten intestinal integrity and affect immune function of shrimp. In this study, the shrimp Litopenaeus vannamei were exposed to the individual and combined stress of nitrite and microplastics for 14 days, and the changes of intestinal histology and physiological functions were investigated. After single and combined stress, affectations occurred in intestinal tissue; the antioxidant enzyme activities (MDA, H2O2, CAT increased) and gene expression levels (CAT, SOD, GPx, HSP70 up -regulated) changed. The expression levels of detoxification genes (CYP450, UGT down -regulated, GST up -regulated), apoptosis genes (CASP-3 up -regulated) and endoplasmic reticulum stress genes (Bip, GRP94 down -regulated) changed. Furthermore, the stress also increased intestinal microbial diversity, causing bacterial composition variation, especially beneficial bacteria and pathogenic bacteria. These results suggested that nitrite and microplastics stress had adverse effects on the intestinal health of L. vannamei by affecting intestinal tissue morphology, immune response and microbial community.

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