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Assefa M, Girmay G. Mycobacterium tuberculosis Biofilms: Immune Responses, Role in TB Pathology, and Potential Treatment. Immunotargets Ther 2024; 13:335-342. [PMID: 38974843 PMCID: PMC11227863 DOI: 10.2147/itt.s455744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Accepted: 06/28/2024] [Indexed: 07/09/2024] Open
Abstract
Tuberculosis (TB) is a major public health problem worldwide, and the burden of drug-resistant TB is rapidly increasing. Although there are literatures about the Mtb biofilms, their impact on immune responses has not yet been summarized. This review article provides recent knowledge on Mycobacterium tuberculosis (Mtb) biofilm-immunity interactions, their importance in pulmonary TB pathology, and immune-based therapy targeting Mtb biofilms. Pellicle/biofilm formation in Mtb contributes to drug resistance, persistence, chronicity, surface attachment, transfer of resistance genes, and modulation of the immune response, including reduced complement activation, changes in the expression of antigenic proteins, enhanced activation of T-lymphocytes, elevated local IFNγ+ T cells, and strong antibody production. The combination of anti-TB drugs and anti-biofilm agents has recently become an effective strategy to improve TB treatment. Additionally, immune-targeted therapy and biofilm-based vaccines are crucial for TB prevention.
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Affiliation(s)
- Muluneh Assefa
- Department of Medical Microbiology, School of Biomedical and Laboratory Sciences, College of Medicine and Health Sciences, University of Gondar, Gondar, Ethiopia
| | - Getu Girmay
- Department of Immunology and Molecular Biology, School of Biomedical and Laboratory Sciences, College of Medicine and Health Sciences, University of Gondar, Gondar, Ethiopia
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Weng S, Li Q, Zhang T, Lin T, He Y, Yang G, Wang H, Xu Y. Enhanced Glycosylation Caused by Overexpression of Rv1002c in a Recombinant BCG Promotes Immune Response and Protects against Mycobacterium tuberculosis Infection. Vaccines (Basel) 2024; 12:622. [PMID: 38932351 PMCID: PMC11209282 DOI: 10.3390/vaccines12060622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Revised: 05/18/2024] [Accepted: 05/21/2024] [Indexed: 06/28/2024] Open
Abstract
Tuberculosis (TB) is a major global health threat despite its virtual elimination in developed countries. Issues such as drug accessibility, emergence of multidrug-resistant strains, and limitations of the current BCG vaccine highlight the urgent need for more effective TB control measures. This study constructed BCG strains overexpressing Rv1002c and found that the rBCG-Rv1002c strain secreted more glycosylated proteins, significantly enhancing macrophage activation and immune protection against Mycobacterium tuberculosis (M. tb). These results indicate that Rv1002c overexpression promotes elevated levels of O-glycosylation in BCG bacteriophages, enhancing their phagocytic and antigenic presentation functions. Moreover, rBCG-Rv1002c significantly upregulated immune regulatory molecules on the macrophage surface, activated the NF-κB pathway, and facilitated the release of large amounts of NO and H2O2, thereby enhancing bacterial control. In mice, rBCG-Rv1002c immunization induced greater innate and adaptive immune responses, including increased production of multifunctional and long-term memory T cells. Furthermore, rBCG-Rv1002c-immunized mice exhibited reduced lung bacterial load and histological damage upon M. tb infection. This result shows that it has the potential to be an excellent candidate for a preventive vaccine against TB.
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Affiliation(s)
- Shufeng Weng
- Department of Infectious Diseases, National Medical Center for Infectious Diseases, State Key Laboratory of Genetic Engineering, Shanghai Key Laboratory of Infectious Diseases and Biosafety Emergency Response, School of Life Sciences, Huashan Hospital, Fudan University, Shanghai 200437, China; (S.W.); (Q.L.); (T.Z.); (T.L.); (Y.H.); (G.Y.); (H.W.)
- Shanghai Sci-Tech Inno Center for Infection & Immunity, Shanghai 200052, China
| | - Qingchun Li
- Department of Infectious Diseases, National Medical Center for Infectious Diseases, State Key Laboratory of Genetic Engineering, Shanghai Key Laboratory of Infectious Diseases and Biosafety Emergency Response, School of Life Sciences, Huashan Hospital, Fudan University, Shanghai 200437, China; (S.W.); (Q.L.); (T.Z.); (T.L.); (Y.H.); (G.Y.); (H.W.)
| | - Tianran Zhang
- Department of Infectious Diseases, National Medical Center for Infectious Diseases, State Key Laboratory of Genetic Engineering, Shanghai Key Laboratory of Infectious Diseases and Biosafety Emergency Response, School of Life Sciences, Huashan Hospital, Fudan University, Shanghai 200437, China; (S.W.); (Q.L.); (T.Z.); (T.L.); (Y.H.); (G.Y.); (H.W.)
| | - Taiyue Lin
- Department of Infectious Diseases, National Medical Center for Infectious Diseases, State Key Laboratory of Genetic Engineering, Shanghai Key Laboratory of Infectious Diseases and Biosafety Emergency Response, School of Life Sciences, Huashan Hospital, Fudan University, Shanghai 200437, China; (S.W.); (Q.L.); (T.Z.); (T.L.); (Y.H.); (G.Y.); (H.W.)
| | - Yumo He
- Department of Infectious Diseases, National Medical Center for Infectious Diseases, State Key Laboratory of Genetic Engineering, Shanghai Key Laboratory of Infectious Diseases and Biosafety Emergency Response, School of Life Sciences, Huashan Hospital, Fudan University, Shanghai 200437, China; (S.W.); (Q.L.); (T.Z.); (T.L.); (Y.H.); (G.Y.); (H.W.)
| | - Guang Yang
- Department of Infectious Diseases, National Medical Center for Infectious Diseases, State Key Laboratory of Genetic Engineering, Shanghai Key Laboratory of Infectious Diseases and Biosafety Emergency Response, School of Life Sciences, Huashan Hospital, Fudan University, Shanghai 200437, China; (S.W.); (Q.L.); (T.Z.); (T.L.); (Y.H.); (G.Y.); (H.W.)
| | - Honghai Wang
- Department of Infectious Diseases, National Medical Center for Infectious Diseases, State Key Laboratory of Genetic Engineering, Shanghai Key Laboratory of Infectious Diseases and Biosafety Emergency Response, School of Life Sciences, Huashan Hospital, Fudan University, Shanghai 200437, China; (S.W.); (Q.L.); (T.Z.); (T.L.); (Y.H.); (G.Y.); (H.W.)
| | - Ying Xu
- Department of Infectious Diseases, National Medical Center for Infectious Diseases, State Key Laboratory of Genetic Engineering, Shanghai Key Laboratory of Infectious Diseases and Biosafety Emergency Response, School of Life Sciences, Huashan Hospital, Fudan University, Shanghai 200437, China; (S.W.); (Q.L.); (T.Z.); (T.L.); (Y.H.); (G.Y.); (H.W.)
- Shanghai Sci-Tech Inno Center for Infection & Immunity, Shanghai 200052, China
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Defining the Genes Required for Survival of Mycobacterium bovis in the Bovine Host Offers Novel Insights into the Genetic Basis of Survival of Pathogenic Mycobacteria. mBio 2022; 13:e0067222. [PMID: 35862770 PMCID: PMC9426507 DOI: 10.1128/mbio.00672-22] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
This is the first report of the genetic requirements of an animal-adapted member of the
Mycobacterium tuberculosis
complex (MTBC) in a natural host.
M. bovis
has devastating impacts on cattle, and bovine tuberculosis is a considerable economic, animal welfare, and public health concern. The data highlight the importance of mycobacterial cholesterol catabolism and identify several new virulence factors.
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