Entry and survival of Salmonella typhimurium in dendritic cells and presentation of recombinant antigens do not require macrophage-specific virulence factors

Details

Serval ID
serval:BIB_9AA457B8887B
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Entry and survival of Salmonella typhimurium in dendritic cells and presentation of recombinant antigens do not require macrophage-specific virulence factors
Journal
Proceedings of the National Academy of Sciences of the United States of America
Author(s)
Niedergang  F., Sirard  J. C., Blanc  C. T., Kraehenbuhl  J. P.
ISSN
0027-8424 (Print)
Publication state
Published
Issued date
12/2000
Volume
97
Number
26
Pages
14650-5
Notes
Journal Article
Research Support, Non-U.S. Gov't --- Old month value: Dec 19
Abstract
Macrophages have long been regarded as the main target encountered by Salmonella typhimurium, a Gram-negative facultative intracellular pathogen that invades the intestinal mucosa. S. typhimurium, however, are first internalized by dendritic cells. To gain new insights into the interactions between Salmonella and the dendritic cells, we compared the fate of wild-type S. typhimurium and the virulence-attenuated PhoP constitutive (PhoP(c)) strain. The PhoP(c) strain is impaired for entry and survival in mammalian cells and is poorly processed by macrophages for antigen presentation on MHC class II molecules. Here, we show that bone marrow-derived dendritic cells can similarly process and present a foreign antigen expressed by the invasive wild-type and the attenuated PhoP(c) S. typhimurium. This property correlates with equivalent entry and survival efficiencies of both strains in dendritic cells. In addition, Salmonella strains mutated in mgtCB, sseC, and orfL genes required for macrophage survival showed no defect in survival in dendritic cells. Together, these results indicate that uptake of Salmonella by dendritic cells and subsequent antigen processing and presentation do not depend on virulence factors important in macrophages.
Keywords
Adenosine Triphosphatases/immunology Animals Antigen Presentation/*immunology Bacterial Proteins/immunology CD4-Positive T-Lymphocytes/immunology Carrier Proteins/immunology *Cation Transport Proteins Dendritic Cells/classification/*immunology/microbiology Female Immunophenotyping Macrophages/*immunology/microbiology Mice Mice, Inbred BALB C Mice, Transgenic Ovalbumin/immunology Phagocytosis/immunology Salmonella typhimurium/*immunology/pathogenicity/physiology
Pubmed
Web of science
Create date
25/01/2008 16:06
Last modification date
20/08/2019 16:01
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