Mycobacterium tuberculosisInhibits Maturation of Human Monocyte‐Derived Dendritic Cells In Vitro
Open Access
- 15 July 2003
- journal article
- Published by Oxford University Press (OUP) in The Journal of Infectious Diseases
- Vol. 188 (2) , 257-266
- https://doi.org/10.1086/376451
Abstract
To induce effector immunity, dendritic cells (DCs) must differentiate into fully mature cells. We show that, after human monocyte-derived DCs were infected with virulent Mycobacterium tuberculosis, up-regulation of cellular-surface maturation markers was minimal and reversible. In the presence of a potent stimulus for maturation (tumor necrosis factor [TNF]-α, interleukin [IL]-1β, and prostaglandin E2 [PGE2]), M. tuberculosis inhibited phenotypic DC maturation. M. tuberculosis-infected DCs had an impaired ability to induce allogeneic lymphoproliferation and activated autologous memory CD4+ and CD8+ T cells optimally only in the presence of TNF-α, IL-1β, and PGE2. Thus, virulent M. tuberculosisinhibits phenotypic and functional maturation of human monocyte-derived DCs. This mechanism, which has been described elsewhere for various viruses and for the virulent mycobacterium M. leprae, may be a novel mechanism that this pathogen uses to evade the host's immune response.Keywords
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