文献类型： 外文期刊
作者： Zhang, Xu 1 ; Xue, Mingyang 3 ; Liu, Lei 1 ; Wang, Huan 1 ; Qiu, Tianxiu 1 ; Zhou, Yan 1 ; Shan, Lipeng 1 ; Wang, Zixuan 1 ; Liu, Guanglu 4 ; Hu, Yang 1 ; Chen, Jiong 1 ;
作者机构： 1.Ningbo Univ, State Key Lab Managing Biot & Chem Threats Qual &, Ningbo 315211, Peoples R China
2.Ningbo Univ, Sch Marine Sci, Lab Biochem & Mol Biol, Meishan Campus, Ningbo 315832, Peoples R China
3.Chinese Acad Fishery Sci, Yangtze River Fisheries Res Inst, Wuhan 430223, Peoples R China
4.Zhoukou Normal Univ, Sch Chem & Chem Engn, Zhoukou 466001, Peoples R China
关键词： Rhein; Immunomodulator; Largemouth bass; Apoptosis; Micropterus salmoides rhabdovirus; Antiviral
期刊名称：FISH & SHELLFISH IMMUNOLOGY （ 影响因子：4.7； 五年影响因子：4.7 ）
ISSN： 1050-4648
年卷期： 2024 年 144 卷
页码：
收录情况： SCI
摘要： Micropterus salmoides rhabdovirus (MSRV) is a significant viral pathogen in largemouth bass aquaculture, causing substantial annual economic losses. However, effective prevention methods remain elusive for various reasons. Medicinal plant extracts have emerged as valuable tools in preventing and managing aquatic animal diseases. Thus, the search for immunomodulators with straightforward, safe structures in plant extracts is imperative to ensure the continued health and growth of the largemouth bass industry. In our research, we employed epithelioma papulosum cyprinid (EPC) cells and largemouth bass as models to assess the anti-MSRV properties and immunomodulatory effects of ten plant-derived bioactive compounds. Among them, rhein demonstrated noteworthy potential, exhibiting a 75 % reduction in viral replication in vitro at a concentration of 50 mg/L. Furthermore, rhein pre-treatment significantly inhibited MSRV genome replication in EPC cells, with the highest inhibition rate reaching 64.8 % after 24 h, underscoring rhein's preventive impact against MSRV. Likewise, rhein displayed remarkable therapeutic effects on EPC cells during the early stages of MSRV infection, achieving a maximum inhibition rate of 85.6 % in viral replication. Subsequent investigations unveiled that rhein, with its consistent activity, effectively mitigated cytopathic effects (CPE) and nuclear damage induced by MSRV infection. Moreover, it restrained mitochondrial membrane depolarization and reduced the apoptosis rate by 38.8 %. In vivo experiments reinforced these findings, demonstrating that intraperitoneal injection of rhein enhanced the expression levels of immune related genes in multiple organs, hindered virus replication, and curtailed the mortality rate of MSRV-infected largemouth bass by 29 %. Collectively, our study endorses the utility of rhein as an immunomodulator to combat MSRV infections in largemouth bass. This not only underscores the potential of rhein as a broad-spectrum antiviral and means to bolster the immune response but also highlights the role of apoptosis as an immunological marker, making it an invaluable addition to the armamentarium against aquatic viral pathogens.
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