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H9N2亚型禽流感病毒感染TC-1细胞诱导的免疫反应
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摘要
为了更好地了解宿主机体对禽流感病毒感染后的免疫反应,本实验以TC-1细胞为模型,感染H9N2亚型禽流感病毒。通过荧光定量PCR(qRT-PCR)和酶联免疫吸附试验(ELISA)的方法检测了3种模式识别受体(TLR-3、RIG-I和MDA-5)和5种炎性细胞因子(IL-6、RANTES、IP-10、TNF-α和IFN-β)。结果显示:3种模式识别受体中MDA-5上调最为明显,5种炎性因子中RANTES和IP-10上调最为明显;而IL-6、TNF-α和IFN-β上调相对较平缓。本研究的结果表明:在病毒感染的过程中MDA-5的反应较TLR-3和RIG-I更为强烈,而在炎性反应的过程中RANTES和IP-10的反应更加剧烈,IL-6、TNF-α和IFN-β的反应则相对较温和一些。本研究在一定程度上反映了机体对流感病毒的免疫反应机制,为在生产中疫苗的使用具有一定的指导意义。
In order to know more about the immune response of the host organism to the infection of avian influenza virus,TC-1 cells were set as a model,which infected by H9N2 subtype AIV.3 kinds of pattern recognition receptors(TLR-3,RIG-I and MDA-5) and 5 kinds of inflammatory cytokines(IL-6,RANTES,IP-10,TNF-α and IFN-β) were detected by quantitative real-time polymerase chain reaction(qRT-PCR) and enzyme-linked immunosorbent assay(ELISA) methods.The results showed that:there were obvious up-regulation in MDA-5,RANTES and IP-10 among the 3 kinds of pattern recognition receptors and 5 kinds of inflammatory cytokines,while IL-6,TNF-α and IFN-β were just mild increase.The results of this study indicated that:MDA-5 played more important role in the identification of the virus TLR-3 and RIG-I,meanwhile,IP-10 and RANTES activated more intense reaction in the inflammatory reaction,the response of IL-6,TNF-αand IFN-β were relatively modest.To a certain extent,this study reflects the mechanism of the host immune response to influenza virus,and it has a certain guiding significance for the use of the vaccine in the production.
引文
[1]Alexander D J.A review of avian influenza in different bird species[J].Vet Microbiol,2000,74:3-13.
    [2]Peiris J S,Guan Y,Markwell D,et al.Cocirculation of avian H9N2 and contemporary"human"H3N2 influenza A viruses in pigs in southeastern China:potential for genetic reassortment?[J]J Virol,2001,75:9679-9686.

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