MiR-130c-5p靶向乌鳢水泡病毒g基因抑制病毒增殖
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Q 786;S 942.5

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中国水产科学研究院珠江研究所重点实验室开放课题(20220103);武汉海关科研项目(2023WK11);国家自然科学基金(32303068)


MiR-130c-5p targets the snakehead vesicular virus g gene to inhibit viral proliferation
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Open Project of Key Laboratory of Pearl River Research Institute, Chinese Academy of Fisheries Sciences; Scientific Research Program of Wuhan Customs; National Natural Science Foundation of China

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    摘要:

    为了研究miR-130c-5p在乌鳢水泡病毒(snakehead vesiculovirus, SHVV)感染中潜在靶基因g的靶向关系以及对病毒复制的影响,本研究以斑点叉尾鮰卵巢(channel catfish ovary, CCO)为实验材料,通过实时荧光定量PCR (quantitative real-time PCR, qRT-PCR)和免疫印迹(Western blot)技术测定SHVV不同感染时间和感染剂量条件下,病毒基因水平和蛋白水平以及miR-130c-5p变化情况。此外,将SHVV的g基因上miR-130c-5p对应的靶序列克隆到质粒pmirGLO,构建质粒pmirGLO-G用于双荧光素酶报告实验进行靶基因验证。结果显示,随着SHVV感染时间及剂量的不断增加,miR-130c-5p和g基因的表达水平都显著上调。进一步实验证明,miR-130c-5p类似物和pmirGLO-G质粒共转染可显著抑制荧光素酶活性强度,而转染miR-130c-5p抑制剂则明显上调了pmirGLO-G报告载体的荧光信号。此外,miR-130c-5p的过表达显著降低了病毒g基因的mRNA及蛋白表达,而抑制miR-130c-5p的表达则上调了g基因的mRNA及蛋白的表达水平。研究结果表明,miR-130c-5p通过靶向SHVV的g基因,引起G蛋白的降解,从而抑制SHVV的增殖。本研究结果为理解microRNA调控SHVV的致病机制提供了重要基础,为抗SHVV疫苗等药物的研发提供了理论支持。

    Abstract:

    In order to investigate the targeting relationship of miR-130c-5p to the potential target gene g in snakehead vesiculovirus (SHVV) infection and its effect on viral replication, the changes of viral gene and protein levels and miR-130c-5p in SHVV were determined in this study by quantitative real-time PCR (qRT-PCR) and Western blot techniques using channel catfish ovary (CCO) as experimental materials. In addition, the target sequence corresponding to miR-130c-5p on the g gene of SHVV was cloned into the plasmid pmirGLO, and the plasmid pmirGLO-G was constructed for dual luciferase reporter assay for target gene verification. The results showed that the expression levels of miR-130c-5p and g genes were significantly up-regulated with the increasing time and dose of SHVV infection. Further experiments showed that co-transfection of miR-130c-5p mimic and pmirGLO-G plasmid significantly inhibited luciferase activity, while transfection of miR-130c-5p inhibitor significantly up-regulated the fluorescence signal of pmirGLO-G reporter vector. In addition, overexpression of miR-130c-5p significantly reduced the mRNA and protein expression of the viral g gene, while inhibition of miR-130c-5p up-regulated the mRNA and protein expression levels of the g gene. The results showed that miR-130c-5p inhibited the proliferation of SHVV by targeting the g gene of SHVV and causing the degradation of G protein. The results of this study provide an important basis for understanding the pathogenic mechanism of microRNA regulation of SHVVV, and provide theoretical support for the development of anti-SHVV vaccines and other drugs.

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季艳,周旋,于永耀,刘晓丹,张驰,林强. MiR-130c-5p靶向乌鳢水泡病毒g基因抑制病毒增殖[J].水产学报,2024,48(5):059402

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  • 收稿日期:2024-01-06
  • 最后修改日期:2024-04-06
  • 录用日期:2024-04-10
  • 在线发布日期: 2024-05-22
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