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Zhao J, Matsuba T, Zhang X, Leano S, Nakajima C, Chagan-Yasutan H, Telan EF, Suzuki Y, Hattori T. Comparison of antibody responses against Mycobacterium tuberculosis antigen Rv0679c in tuberculosis patients from the endemic and non-endemic regions of the Beijing genotype: a case control study. BMC Infect Dis 2017; 17:344. [PMID: 28506215 PMCID: PMC5433171 DOI: 10.1186/s12879-017-2442-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Accepted: 05/04/2017] [Indexed: 11/10/2022] Open
Abstract
Background Strains of the Beijing genotype of Mycobacterium tuberculosis (MTB) are reportedly associated with the virulence of tuberculosis (TB) infection, unfavorable outcomes of anti-TB treatment, and the global TB pandemic. Rv0679c, a hypothetical membrane protein related to host cell invasion, has a Beijing genotype-specific mutation at residue 142 (Asn142Lys). Antigenicity differences between Rv0679c-Asn142 (N-type) and Rv0679c-Lys142 (K-type) have been previously observed in mice antigen-antibody responses. However, the immune response to Rv0679c in humans remains unknown. Therefore, we aimed to investigate the anti-Rv0679c immune response in TB patients from the endemic and non-endemic regions of the Beijing MTB genotype. Methods We analyzed the Rv0679c-specific antibody responses in 84 subjects from the endemic region of the Beijing genotype MTB in China, including 45 pulmonary TB patients (C-PTB) and 39 healthy controls (C-HC), and 81 subjects from the Philippines (the endemic region of the non-Beijing genotype), including 51 pulmonary TB patients (P-PTB) and 30 healthy controls (P-HC). Anti-tuberculous-glycolipid (TBGL) antigen was used as the control antibody. Results TBGL IgG titers were higher in both C-PTB and P-PTB than those in their corresponding HC (C-PTB median 4.2, P-PTB median 11.2; C-PTB vs. P-PTB, p > 0.05), suggesting immune response comparability in PTB from two different countries. C-PTB showed a higher response compared to C-HC for anti-K-type IgG (53.3%) than anti-N-type IgG (6.67%); this response was not observed in P-PTB (both N-type and K-type 9.80%). Conclusion Dimorphic antigen Rv0679c was found to be associated with distinct immune response patterns, indicating the role of Beijing/non-Beijing genotype of MTB in stimulating specific responses in TB patients from the endemic region of Beijing MTB. Meanwhile, reactions to Rv0679c in patients and HC from non-endemic regions of the Beijing MTB may be caused by the response to the common epitope of Rv0679c N/K-type.
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Affiliation(s)
- Jingge Zhao
- Laboratory of Disaster Medicine, International Research Institute of Disaster Science, Tohoku University, Sendai, Miyagi, 980-8574, Japan
| | - Takashi Matsuba
- Division of Bacteriology, Department of Microbiology and Immunology, Faculty of Medicine, Tottori University, Yonago, Tottori, 683-8503, Japan
| | - Xiaoyan Zhang
- Shanghai Public Health Clinical Center, Fudan Univeristy, Shanghai, 201508, China
| | - Susan Leano
- STD AIDS Cooperative Central Laboratory, San Lazaro Hospital, Quiricada Street, 1003, Manila, Philippines
| | - Chie Nakajima
- Division of Global Epidemiology, Hokkaido University Research Center for Zoonosis Control, Sapporo, Hokkaido, 001-0020, Japan.,The Global Station for Zoonosis Control, Hokkaido University Global Institution for Collaborative Research and Education, Sapporo, Hokkaido, 001-0020, Japan
| | - Haorile Chagan-Yasutan
- Laboratory of Disaster Medicine, International Research Institute of Disaster Science, Tohoku University, Sendai, Miyagi, 980-8574, Japan
| | - Elizabeth Freda Telan
- STD AIDS Cooperative Central Laboratory, San Lazaro Hospital, Quiricada Street, 1003, Manila, Philippines
| | - Yasuhiko Suzuki
- Division of Global Epidemiology, Hokkaido University Research Center for Zoonosis Control, Sapporo, Hokkaido, 001-0020, Japan.,The Global Station for Zoonosis Control, Hokkaido University Global Institution for Collaborative Research and Education, Sapporo, Hokkaido, 001-0020, Japan
| | - Toshio Hattori
- Graduate School of Health Science Studies, Kibi International University, 8 Igamachi, Takahashi, 716-8508, Japan.
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