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Immunogenicity of Whole Mycobacterium intracellulare Proteins and Fingding on the Cross-Reactive Proteins between M. intracellulare and M. tuberculosis

摘要Objectives To evaluate the immunogenicity of Mycobacterium intracellulare proteins and determine the cross-reactive proteins between M. intracellulare and M. tuberculosis. Methods Protein extracts from M. intracellulare were used to immunize BALB/c mice. The antigens were evaluated using cellular and humoral immunoassays. The common genes between M. intracellular and M. tuberculosis were identified using genome-wide comparative analysis, and cross-reactive proteins were screened using immunoproteome microarrays. Results Immunization with M. intracellulare proteins induced significantly higher levels of the cytokines interferon-γ (IFN-γ), interleukin-2 (IL-2), interleukin-12 (IL-12), interleukin-6 (IL-6) and immunoglobulins IgG, IgG1, IgM, and IgG2a in mouse serum. Bone marrow-derived macrophages isolated from mice immunized with M. intracellulare antigens displayed significantly lower bacillary loads than those isolated from mice immunized with adjuvants. Whole-genome sequence analysis revealed 396 common genes between M. intracellulare and M. tuberculosis. Microchip hybridization with M. tuberculosis proteins revealed the presence of 478 proteins in the serum of mice immunized with M. intracellulare protein extracts. Sixty common antigens were found using both microchip and genomic comparative analyses. Conclusion This is the advanced study to investigate the immunogenicity of M. intracellulare proteins and the cross-reactive proteins between M. intracellulare and M. tuberculosis. The results revealed the presence of a number of cross-reactive proteins between M. intracellulare and M. tuberculosis. Therefore, this study provides a new way of identifying immunogenic proteins for use in tuberculosis vaccines against both M. intracellulare and M. tuberculosis in future.

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作者 XIAO Shi Qi [1] XU Da [2] DUAN Hong Yang [2] FAN Xue Ting [2] LI Gui Lian [2] ZHANG Wen [2] LI Ma Chao [2] HAN Na [2] LI Xin Yao [2] LI Na [2] ZHAO Li lan [3] ZHAO Xiu Qin [2] WAN Kang Lin [2] LIU Hai Can [2] FENG Wen Hai [4] 学术成果认领
作者单位 State Key Laboratory of Agrobiotechnology,Department of Microbiology and Immunology,College of Biological Sciences,China Agricultural University,Beijing 100193,China;State Key Laboratory for Infectious Disease Prevention and Control,National Institute for Communicable Disease Control and Prevention,Chinese Center for Disease Control and Prevention,Beijing 102206,China [1] State Key Laboratory for Infectious Disease Prevention and Control,National Institute for Communicable Disease Control and Prevention,Chinese Center for Disease Control and Prevention,Beijing 102206,China [2] State Key Laboratory for Infectious Disease Prevention and Control,National Institute for Communicable Disease Control and Prevention,Chinese Center for Disease Control and Prevention,Beijing 102206,China;Department of Stomatology,The Second Xiangya Hospital of Central South University,Changsha 410000,Hunan,China [3] State Key Laboratory of Agrobiotechnology,Department of Microbiology and Immunology,College of Biological Sciences,China Agricultural University,Beijing 100193,China [4]
栏目名称 Original Articles
DOI 10.3967/bes2021.073
发布时间 2021-08-20
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生物医学与环境科学(英文版)

生物医学与环境科学(英文版)

2021年34卷7期

528-539,中插2-中插15页

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