鸭源H7N9亚型禽流感病毒感染SPF鸡转录组学分析

目的 为了分析鸭源H7N9亚型禽流感病毒感染SPF鸡后宿主基因表达水平的变化。方法 以鸭源H7N9亚型禽流感病毒感染SPF鸡,收集肺脏进行高通量测序。结果 与对照组相比,感染组得到差异表达基因740个,其中上调基因有602个,下调基因有138个。GO条目分析发现,差异基因主要涉及免疫应答反应和炎症反应等。经KEGG 数据库比对注释及富集分析显示有7个通路富集显著,其中Toll-like信号通路有11个基因表达上调,分别为IL-6、TLR4、PIK3、IRF7、MD-2、IRF5、MYD88、CD86、STAT1、TLR2和CCL4,NOD-like受体信号通路有7个基因表达上调,分别为IRF7、CTSB、P2RX7、CYBB、PSTPIP1、HSP90AA1和NAMPT。结论 鸭源H7N9亚型病毒感染SPF鸡后,免疫相关基因表达明显增强。在Toll-like信号通路中, TLR4在MD-2的协助下被激活,随后依赖MYD88途径激活下游的IRF5,继而引起CCL4、IL-6显著表达。同时NLRP3炎症体在H7N9亚型病毒感染过程中也发挥着重要作用。

Transcriptomic expression profiles of SPF chicken infected with duck-origin H7N9 subtype avian influenza virus

To investigate the expression changes of host genes of SPF chickens infected with duck-origin H7N9 subtype avian influenza virus. The lungs of SPF chickens infected with duck-origin H7N9 subtype avian influenza virus were collected for high-throughput sequencing. Compared with the control group, 740 genes were differentially expressed in the infection group, including 602 up-regulated genes and 138 down-regulated genes. The analysis of the GO items showed that the differentially expressed genes were mainly involved in immune responses and inflammatory responses. KEGG database comparative annotation and enrichment analysis showed that there were 7 pathways with significant enrichment, among which 11 genes were up-regulated in Toll-like pathway, namely IL-6, TLR4, Pik3, IRF7, MD-2, IRF5, MYD88, CD86, STAT1, TLR2, and CCL4. There were 7 up-regulated genes in NOD-like receptor signaling pathway, which were IRF7, CTSB, P2RX7, CYBB, PSTPIP1, HSP90AA1, and NAMPT. In Toll-like signaling pathway,TLR4 was activated by MD-2 after viral infection, and then activated downstream IRF5. At the same time, the NLRP3 inflamator also played an important role in the process of H7N9 virus infection.