NDLI: Bordetella pertussis-Infected Human Monocyte-Derived Dendritic Cells Undergo Maturation and Induce Th1 Polarization and Interleukin-23 Expression

Content Provider	PubMed Central
Author	Fedele, Giorgio Stefanelli, Paola Spensieri, Fabiana Fazio, Cecilia Mastrantonio, Paola Ausiello, Clara M.
Copyright Year	2005
Abstract	Bordetella pertussis, the causative agent of whooping cough, is internalized by several cell types, including epithelial cells, monocytes, and neutrophils. Although its ability to survive intracellularly is still debated, it has been proven that cell-mediated immunity (CMI) plays a pivotal role in protection. In this study we aimed to clarify the interaction of B. pertussis with human monocyte-derived dendritic cells (MDDC), evaluating the ability of the bacterium to enter MDDC, to survive intracellularly, to interfere with the maturation process and functional activities, and to influence the host immune responses. The results obtained showed that B. pertussis had a low capability to be internalized by—and to survive in—MDDC. Upon contact with the bacteria, immature MDDC were induced to undergo phenotypic maturation and acquired antigen-presenting-cell functions. Despite the high levels of interleukin-10 (IL-10) and the barely detectable levels of IL-12 induced by B. pertussis, the bacterium induced maturation of MDDC and T helper 1 (Th1) polarized effector cells. Gene expression analysis of the IL-12 cytokine family clearly demonstrated that B. pertussis induced high levels of the p40 and p19 subunits of IL-23 yet failed to induce the expression of the p35 subunit of IL-12. Overall our findings show that B. pertussis, even if it survives only briefly in MDDC, promotes the synthesis of IL-23, a newly discovered Th1 polarizing cytokine. A Th1-oriented immune response is thus allowed, relevant in the induction of an adequate CMI response, and typical of protection induced by natural infection or vaccination with whole-cell vaccines.
Related Links	http://dx.doi.org/10.1128/iai.73.3.1590-1597.2005
Ending Page	1597
Page Count	8
Starting Page	1590
File Format	PDF
ISSN	00199567
e-ISSN	10985522
Journal	Infection and Immunity
Issue Number	3
Volume Number	73
Language	English
Publisher	American Society for Microbiology
Publisher Date	2005-03-01
Access Restriction	Open
Rights Holder	American Society for Microbiology
Subject Keyword	Immunology Microbiology Parasitology Infectious Diseases Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Infectious Diseases Parasitology Immunology Microbiology

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