Mycobacterium tuberculosis surface antigens (Mtb surface antigens)

Mycobacterium tuberculosis (Mtb) surface antigens are a diverse group of molecules, including proteins, glycolipids, and polysaccharides, located on the outer envelope of the bacterium [1]. These antigens, such as Lipoarabinomannan (LAM) and the Antigen 85 complex, play critical roles in the pathogen's interaction with the host immune system, facilitating adhesion, entry into macrophages, and evasion of host defenses [2][3]. They are primary targets for the development of vaccines, such as the Bacillus Calmette-Guérin (BCG) vaccine and the M72/AS01E candidate, which aim to induce protective T-cell and B-cell responses [4]. Additionally, surface antigens serve as essential biomarkers for diagnostic assays, most notably the urine LAM test used for rapid tuberculosis detection in HIV-positive individuals [5]. Targeting these surface components with therapeutic antibodies or small molecules aims to neutralize the bacteria or enhance host-mediated clearance [6]. However, the waxy, impermeable nature of the mycobacterial cell wall and the high degree of antigenic variation present significant challenges for therapeutic intervention and long-term immunity [1][6]. References: [1] Brennan, P. J. (2003). Tuberculosis, 83(1-3), 91-97. [2] Ernst, J. D. (2012). Nature Reviews Immunology, 12(8), 581-591. [3] Vergne, I., et al. (2004). Annual Review of Cell and Developmental Biology, 20, 367-394. [4] Tait, D. R., et al. (2019). New England Journal of Medicine, 381(25), 2429-2439. [5] Lawn, S. D., et al. (2012). Lancet Infectious Diseases, 12(3), 201-209. [6] Gengenbacher, M., & Kaufmann, S. H. (2012). FEMS Microbiology Reviews, 36(3), 514-532.

Other names

Mtb cell wall antigensMtb envelope proteinsMycobacterial surface proteinsMtb surface-exposed proteins

Induction of protective immune responses, neutralization of bacterial entry, and diagnostic identification of mycobacterial components.