Outer Membrane Vesicles Coating Nano-Glycyrrhizic Acid Confers Protection Against Borderella bronchiseptica Through Th1/Th2/Th17 Responses
文献类型: 外文期刊
作者: Huang, Yee 1 ; Nan, Li 1 ; Xiao, Chenwen 1 ; Dong, Jie 1 ; Li, Ke 1 ; Cheng, Jvfen 1 ; Ji, Quanan 1 ; Wei, Qiang 1 ; Bao, Guolian 1 ; Liu, Yan 1 ;
作者机构: 1.Zhejiang Acad Agr Sci, Inst Anim Husb & Vet Med, Hangzhou 310021, Peoples R China
关键词: outer membrane vesicles; glycyrrhizic acid nanoparticle; macrophage; protective immune response; anti-bacterial infection
期刊名称:INTERNATIONAL JOURNAL OF NANOMEDICINE ( 影响因子:7.033; 五年影响因子:7.419 )
ISSN: 1178-2013
年卷期: 2022 年 17 卷
页码:
收录情况: SCI
摘要: Purpose: Outer membrane vesicles (OMVs) are spherical nano-sized proteolipids secreted by numerous pathogenic Gram-negative bacteria. Due to the immunostimulatory properties and protective efficacy, OMVs have received increasing attention as a candidate for the vaccine to prevent and treat bacterial infections. However, the immune response remains elusive due to the low structural stability and poor size homogeneity of the vesicles. In this study, OMVs were used to coat self-assembled glycyrrhizic acid nanoparticles (GANs) and obtain a stable OMV vaccine. The immunoprotective effects and anti-infection efficacy were evaluated in vivo and in vitro. Methods: The OMVs were prepared by ultrafiltration method and fused with GAN through mechanical extrusion. The characteristics, including morphology, hydrodynamic size, zeta potential, and stability were evaluated. The in vitro immunological function of GANOMV on the macrophages and in vivo immune efficacy and anti-infection effect were examined and compared. Results: The results showed that the GAN-OMV were homogenous with a size of 130 nm and a stable core-shell structure. Micropinocytosis-dependent and clathrin-mediated endocytotic pathways effectively internalized the GAN-OMV into the macrophages and promoted cell proliferation, cytokine secretion, and M1 polarization. Furthermore, subcutaneous GAN-OMV vaccination contributed to significantly higher Borderella bronchiseptica (Bb)-specific antibody production and lymphocyte proliferation. The splenic lymphocytes of mice immunized with GAN-OMVs displayed a higher ratio of CD4+/CD8+ T cells and CD19+ B cells and produced significantly higher levels of Th1/Th2/Th17 cytokines. GAN-OMV also effectively prevented Bb reinfection. Conclusion: In this study, GAN-OMV was developed successfully to stimulate Th1/Th2/Th17 immune responses against Bb and provide a promising strategy for novel vaccine development against the microbial pathogen.
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