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Effects of Mycoplasma hyopneumoniae on porcine nasal cavity dendritic cells

文献类型： 外文期刊

作者： Shen, Yumeng 1 ; Hu, Weiwei 1 ; Wei, Yanna 2 ; Feng, Zhixin 2 ; Yang, Qian 1 ;

作者机构： 1.Nanjing Agr Univ, Vet Coll, Weigang 1, Nanjing 210095, Jiangsu, Peoples R China

2.Jiangsu Acad Agr Sci, Natl Ctr Engn Res Vet Bioprod, Inst Vet Med, Key Lab Vet Biol Engn & Technol,Minist Agr, Nanjing 210014, Jiangsu, Peoples R China

关键词： Mycoplasma hyopneumoniae;Dendritic cells;Nasal cavity

期刊名称：VETERINARY MICROBIOLOGY （ 影响因子：3.293； 五年影响因子：3.599 ）

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收录情况： SCI

摘要： Mycoplasma hyopneumoniae (Mhp) is the primary etiological agent responsible for swine enzootic pneumonia (EP), a disease that cause tremendous economic losses all over the swine industry. Dendritic cells (DCs), the most effective antigen-presenting cells, are widely distributed beneath respiratory epithelium. DCs uptake and present antigens to T cells, to initiate protective immune responses or generate immune-mediated pathology in different infections. In this study, we investigated the changes in the different DCs subpopulations, T cells and SIgA positive cells counts in porcine nasal cavity after long time Mhp infection. We further evaluated the role of porcine DCs in Mhp exposure. Our results showed that the number of SLA-II-DR(+)SWC3a(+)DCs, SLA-II-DR(+)CD11b(+) DCs, T cells, SIgA positive cells in nasal cavity were decreased after Mhp 28 days infection in vivo experiment. The antigen presenting ability of DCs were inhibited by Mhp exposure. DCs couldn't activate T-cell proliferation by down-regulating the antigen presenting molecule CD1a expression and promoting high level of IL-10 production. Further more, the expression levels of IL-12 and IFN-gamma in DCs were decreased, suggesting that DCs favour for Th2 immune response development after Mhp exposure in vitro. Taken together, Mhp infection impairs the immune function which allows the persistence of Mhp and cause predispose pigs to secondary infections. The decline of DCs presentation ability is the reason why dysfunction and persistence in Mhp infection. These findings are benefit for exploring the pathogenic mechanisms of Mhp in pigs. (C) 2016 Elsevier B.V. All rights reserved.

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