畜牧兽医学报 ›› 2025, Vol. 56 ›› Issue (7): 3378-3389.doi: 10.11843/j.issn.0366-6964.2025.07.030

• 预防兽医 • 上一篇    下一篇

羊布鲁菌外膜囊泡蛋白质组学分析及免疫原性评价

刘雨欣1(), 陈思1(), 高阳1, 顾德媛1, 彭海涛1, 张东1, 张如1, 许会会1, 刘亚乔2,*(), 杨艳玲1,*()   

  1. 1. 中国农业科学院特产研究所, 长春 130000
    2. 中华人民共和国大窑湾海关, 大连 116600
  • 收稿日期:2024-08-28 出版日期:2025-07-23 发布日期:2025-07-25
  • 通讯作者: 刘亚乔,杨艳玲 E-mail:2867366057@qq.com;chensi_1024@163.com;chang375479555@126.com;m18043213639@163.com
  • 作者简介:刘雨欣(2000-),女,河南邓州人,硕士生,主要从事预防兽医学研究,E-mail: 2867366057@qq.com
    陈思(1988-),辽宁抚顺人,博士,主要从事预防兽医学研究,E-mail:chensi_1024@163.com
  • 基金资助:
    “十四五”重点研发计划(2023YFD1800700;2023YFD1800703);中国农业科学院科技创新工程(CAAS-ZDRW202410);吉林省肉牛专项(YDZJ202203CGZH051)

Proteomic Analysis and Immunogenicity Evaluation of Outer Membrane Vesicles of Brucella melitensis

LIU Yuxin1(), CHEN Si1(), GAO Yang1, GU Deyuan1, PENG Haitao1, ZHANG Dong1, ZHANG Ru1, XU Huihui1, LIU Yaqiao2,*(), YANG Yanling1,*()   

  1. 1. Institute of Special Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Changchun 130000, China
    2. Dayaowan Customs District of P. R. China, Dalian 116600, China
  • Received:2024-08-28 Online:2025-07-23 Published:2025-07-25
  • Contact: LIU Yaqiao, YANG Yanling E-mail:2867366057@qq.com;chensi_1024@163.com;chang375479555@126.com;m18043213639@163.com

摘要:

旨在提取羊布鲁菌生物3型外膜囊泡(outer membrane vesicles, OMVs)并分析其蛋白组成成分,制备OMVs亚单位疫苗,评价OMVs疫苗的免疫原性。本研究利用差速离心法提取了OMVs,通过SDS-PAGE、透射电镜和ZeTA纳米粒径对OMVs进行鉴定;利用Label free液相质谱技术鉴定OMVs蛋白质组成成分,并进行GO聚类分析和KEGG富集分析;OMVs亚单位疫苗免疫小鼠后,对小鼠脾脏进行病理检测和T细胞亚群分类检测;对小鼠血清进行IL-2、IFN-γ、TNF-α、IL-4、IL-6、IL-10、IL-17A炎性细胞因子水平检测和IgG 1、IgG 2a和IgG 2b免疫球蛋白含量检测,评价OMVs免疫后小鼠的病理变化和细胞免疫水平。结果显示:成功提取了OMVs,其粒径大小为20~200 nm,相对分子质量在10~130 ku之间。蛋白质组学鉴定结果显示,OMVs中含有1 612种蛋白质,其中包括Omp2b、Omp25、Omp31、Omp19和Bp26等多种外膜蛋白,以及脂蛋白和ABC转运体相关蛋白质。OMVs亚单位疫苗免疫小鼠后,小鼠脾脏未见明显的淋巴细胞排列疏松及坏死;诱导小鼠产生高水平IgG免疫球蛋白含量;同时诱导小鼠血清中IFN-γ、IL-2、IL-6、IL-17A和TNF-α炎性细胞因子表达量上升,IL-10和IL-4炎性细胞因子表达量下降;CD4+/CD8+T细胞比值增加。本研究证明OMVs中含有多个有效的免疫原性抗原,能诱导小鼠产生较好的细胞免疫水平,为明确布鲁菌OMVs蛋白成分和布鲁菌亚单位疫苗研发奠定了理论基础。

关键词: 布鲁菌, 外膜囊泡, 蛋白质组学, 免疫原性

Abstract:

This study aims to extract Brucella melitensis biotype 3 outer membrane vesicles (OMVs), analyze their protein components, and prepare an OMV subunit vaccine to evaluate its immunogenicity. OMVs were extracted using differential centrifugation, and characterized by SDS-PAGE, transmission electron microscopy, and ZeTA nanoparticle size analysis. The protein components of the OMVs were identified using label-free liquid chromatography-mass spectrometry (LC-MS), followed by Gene Ontology (GO) clustering and KEGG pathway enrichment analysis. After immunizing mice with the OMV subunit vaccine, histopathological analysis of mouse spleens and T cell subpopulation classification were performed. Inflammatory cytokine levels, including IL-2, IFN-γ, TNF-α, IL-4, IL-6, IL-10, and IL-17A, as well as immunoglobulin levels (IgG1, IgG2a, and IgG2b) in mouse serum samples, were measured to assess the pathological changes and cellular immune response post-immunization. Results were as follows: OMVs were successfully extracted with particle sizes ranging from 20 to 200 nm and molecular weights between 10 to 130 ku. Proteomic analysis identified 1 612 proteins in OMVs, including several outer membrane proteins such as Omp2b, Omp25, Omp31, Omp19, and Bp26, as well as lipoproteins and proteins related to ABC transporters. After immunization with the OMV subunit vaccine, no significant lymphocyte disorganization or necrosis was observed in mouse spleens. The vaccine induced high levels of IgG immunoglobulin and elevated the expression of inflammatory cytokines IFN-γ, IL-2, IL-6, IL-17A, and TNF-α, while reducing IL-10 and IL-4 levels. The CD4+/CD8+T cell ratio also increased. The study demonstrates that OMVs contain several effective immunogenic antigens capable of inducing strong cellular immune responses in mice. This lays the theoretical foundation for identifying the protein components of OMVs and developing Brucella subunit vaccines.

Key words: Brucella, outer membrane vesicles, proteomics, immunogenicity

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