alexa Restraining mycobacteria: role of granulomas in mycobacterial infections.
Infectious Diseases

Infectious Diseases

Journal of Infectious Diseases & Preventive Medicine

Author(s): Saunders BM, Cooper AM, Saunders BM, Cooper AM

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Abstract The generation of prolonged immunity to Mycobacterium tuberculosis requires not only an antigen-specific IFN-gamma-producing T cell response, including both CD4 and CD8 T cells, but also the generation of protective granulomatous lesions, whereby the close apposition of activated T cells and macrophages acts to contain bacterial growth. The importance of the granulomatous lesion in controlling this immune response and in limiting both tissue damage and bacterial dissemination has been considered a secondary event but, as the present review illustrates, is no less important in surviving mycobacterial infection than an antigen-specific T-cell response. The formation of a protective granuloma involves the orchestrated production of a host of chemokines and cytokines, the upregulation of their receptors along with upregulation of addressins, selectins and integrins to coordinate the recruitment, migration and retention of cells to and within the granuloma. In the present review, the principal components of the protective response are outlined and the role of granuloma formation and maintenance in mediating prolonged containment of mycobacteria within the lung is addressed. This article was published in Immunol Cell Biol and referenced in Journal of Infectious Diseases & Preventive Medicine

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