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The Campylobacter jejuni NCTC11168 capsule prevents excessive cytokine production by dendritic cells.
MedLine Citation:
PMID:  21863342     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Campylobacter jejuni is the leading cause of human bacterial gastroenteritis worldwide, mainly caused by handling and consumption of contaminated poultry. However, the immune response to infection is poorly understood. Here, the impact of the C. jejuni capsule, flagella and the N-linked glycosylation system on cytokine production by dendritic cells was investigated. Bone marrow-derived murine dendritic cells (BMDCs) infected with C. jejuni lacking the N-linked glycosylation system produced similar amounts of cytokines compared to cells infected with C. jejuni 11168H wild-type (WT) cultures. C. jejuni flagellin FlaA mutants elicited reduced IL-6 and IL-10 production in BMDCs compared to C. jejuni WT and this reduction was more pronounced in TLR4(-/-) BMDCs. An acapsular C. jejuni mutant as well as a mutant lacking the O-methyl phosphoramidate modification of the capsule elicited a higher cytokine response in BMDCs. Experiments with TLR4(-/-) BMDCs revealed that this increased cytokine production was not solely dependent on signalling through TLR4. Therefore, the C. jejuni capsule is important to prevent excessive cytokine production by BMDCs and even minor changes in capsule composition such as the lack of the O-methyl phosphoramidate modification can lead to increased cytokine production.
Authors:
Anna Rose; Emily Kay; Brendan W Wren; Margaret J Dallman
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-8-24
Journal Detail:
Title:  Medical microbiology and immunology     Volume:  -     ISSN:  1432-1831     ISO Abbreviation:  -     Publication Date:  2011 Aug 
Date Detail:
Created Date:  2011-8-24     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0314524     Medline TA:  Med Microbiol Immunol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Division of Cell and Molecular Biology, Imperial College, London, UK.
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