畜牧兽医学报 ›› 2018, Vol. 49 ›› Issue (11): 2521-2528.doi: 10.11843/j.issn.0366-6964.2018.11.025

• 研究简报 • 上一篇    下一篇

禽流感病毒H9N2与新城疫病毒在鸡成纤维细胞中共感染对病毒复制的影响

谢军1,3,4,5, 孙英杰2, 周昌娈2, 朱善元5, 丁铲2*, 柏家林1,3,4*   

  1. 1. 西北民族大学生物工程与技术国家民委重点实验室, 兰州 730030;
    2. 中国农业科学院上海兽医研究所, 上海 200241;
    3. 西北民族大学, 甘肃省动物细胞工程技术研究中心, 兰州 730030;
    4. 西北民族大学生命科学与工程学院, 兰州 730030;
    5. 江苏农牧科技职业学院江苏省兽用生物制药高技术研究重点实验室, 泰州 225300
  • 收稿日期:2018-01-23 出版日期:2018-11-23 发布日期:2019-01-23
  • 通讯作者: 柏家林,E-mail:jlbai@xbmu.edu.cn;丁铲,E-mail:shoveldeen@shvri.ac.cn
  • 作者简介:谢军(1990-),男,江苏泰州人,硕士,主要从事动物分子病毒学研究,E-mail:xjjstz2018@163.com
  • 基金资助:

    国家自然科学基金重点项目(31530074);国家自然科学基金面上项目(31372421);国家自然科学基金青年基金(31400144)

The Effect of Co-infection of H9N2 Subtype Avian Influenza Virus and Newcastle Disease Virus on Virus Replication in the DF-1 of Chicken Embryo Fibroblasts

XIE Jun1,3,4,5, SUN Ying-jie2, ZHOU Chang-luan2, ZHU Shan-yuan5, DING Chan2*, BAI Jia-lin1,3,4*   

  1. 1. Key Lab of Bioengineering of the State Ethnic Affairs Commission, Northwest Minzu University, Lanzhou 730030, China;
    2. Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China;
    3. Gansu Engineering Research Center for Animal Cell, Northwest Minzu University, Lanzhou 730030, China;
    4. Faculty of Life Science and Engineering, Northwest Minzu University, Lanzhou 730030, China;
    5. Jiangsu Key Laboratory of Veterinary Biotechnologic Drug, Jiangsu Agri-animal Husbandry Vocational College, Taizhou 225300, China
  • Received:2018-01-23 Online:2018-11-23 Published:2019-01-23

摘要:

临床上禽流感病毒(avian influenza virus,AIV)与新城疫病毒(Newcastle disease virus,NDV)共同感染情况经常发生。为研究AIV与NDV在鸡成纤维细胞DF-1中的共感染对病毒复制的相互影响,首先对NDV和H9N2亚型AIV单独感染DF-1细胞时病毒的复制情况进行了分析,设定以NDV和AIV共感染细胞后12和24 h作为样品采集点,通过Western blot、间接免疫荧光和实时荧光定量PCR检测了两种病毒共感染与单独感染对病毒NP蛋白表达的相互影响。结果显示:Western blot分析表明共感染12和24 h,NDV NP蛋白的表达分别下调了70.6%(P<0.001)和45.7%(P<0.001),AIV NP蛋白的表达分别下调了61.5%(P<0.001)和82.8%(P<0.001);免疫荧光分析显示共感染组细胞中NDV和AIV的NP蛋白丰度在感染12 h时间点分别下调81.1%(P<0.001)和65.5%(P<0.001),24 h时则分别下调41.2%(P<0.05)和47.4%(P<0.001);qPCR结果也证实共感染12和24 h组NDV NP的mRNA表达水平分别下调了64.3%(P<0.001)和64.4%(P<0.05),AIV NP的mRNA表达水平分别下调了61.5%(P<0.001)和63.0%(P<0.001)。本研究证明AIV与NDV共感染在细胞水平上可引起病毒复制的相互抑制,为研究NDV和AIV共感染机制在细胞水平上奠定了基础。

关键词: 禽流感病毒, 新城疫病毒, 鸡成纤维细胞DF-1, 共感染, 病毒复制

Abstract:

The co-infection of avian influenza virus (AIV) and Newcastle disease virus (NDV) in Chickens is common clinical incident. To study the effect of co-infection of AIV (H9N2) and NDV (Herts/33) on virus replication in the DF-1 of chicken embryo fibroblasts, the replication of AIV and NDV in the DF-1 was first analyzed respectively and post-infection 12 and 24 h were selected as sample collecting time. The Western blot, immunofluorescence assay and real-time fluorescence quantitative PCR (qPCR) were conducted to compare the replication of AIV and NDV between co-infection and individual infection groups. Compared with the single virus infection group, the intensity band ratio of NDV NP in Western blot analysis in 12 and 24 h post-infection were down-regulated by 70.6% (P<0.001) and 45.7% (P<0.001),while AIV NP was down-regulated by 61.5% (P<0.001) and 82.8% (P<0.001), respectively. The optical intensity band ratio of AIV NP and NDV NP were decreased by 81.1% (P<0.001) and 65.5% (P<0.001) in 12 h post-infection, 41.2% (P<0.05) and 47.4% (P<0.001) in 24 h post-infection. The relative mRNA expression of NDV NP in co-infection in 12 and 24 h post-infection was descended by 64.3% (P<0.001) and 64.4% (P<0.05), while AIV NP was 61.5% (P<0.001) and 63.0% (P<0.001), respectively. These findings indicate that co-infection of AIV and NDV is able to inhibit their replication at cellular level, laying the foundation of further study the mechanism of common infection of AIV and NDV.

Key words: avian influenza virus, Newcastle disease virus, chicken fibroblast DF-1, co-infection, virus replication

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