NDLI: Yersinia enterocolitica Induces Apoptosis and Inhibits Surface Molecule Expression and Cytokine Production in Murine Dendritic Cells

Content Provider	PubMed Central
Author	Erfurth, Stella E. Gröbner, Sabine Kramer, Uwe Gunst, Dani S. J. Soldanova, Irena Schaller, Martin Autenrieth, Ingo B. Borgmann, Stefan
Copyright Year	2004
Abstract	Yersinia enterocolitica evades innate immunity by expression of a variety of pathogenicity factors. Therefore, adaptive immunity including CD4+ T cells plays an important role in defense against Y. enterocolitica. We investigated whether Y. enterocolitica might target dendritic cells (DC) involved in adaptive T-cell responses. For this purpose, murine DC were infected with Y. enterocolitica wild-type and mutant strains prior to incubation with ovalbumin (OVA) as antigen and 5-(6)-carboxyfluorescein diacetate N-succinimidyl ester-labeled OVA-specific T cells from DO11.10 mice. While T-cell proliferation was partially affected by infection of DC with plasmid-cured and YopP-deficient Yersinia mutant strains, no T-cell proliferation occurred after infection of DC with wild-type Y. enterocolitica. Infection of DC with Y. enterocolitica wild type resulted in decreased up-regulation of major histocompatibility complex class II, CD54 (intercellular adhesion molecule 1), CD 80, and CD86 expression. Experiments with plasmid-cured Y. enterocolitica or a YopP-deficient mutant strain revealed that YopP accounts for inhibition of surface molecule expression. Wild-type Y. enterocolitica suppressed the release of KC, tumor necrosis factor alpha, interleukin-10 (IL-10), and IL-12 by DC, while infection of DC with plasmid-cured Y. enterocolitica or with the YopP-deficient mutant resulted in the production of these cytokines. Moreover, infection with wild-type Y. enterocolitica induced apoptosis in DC mediated by YopP. Apoptosis occurred despite translocation of NF-κB to the nucleus, as demonstrated by electromobility shift assays. Together, these data demonstrate that Y. enterocolitica targets functions of murine DC that are required for T-cell activation. This might contribute to evasion of adaptive immune responses by Y. enterocolitica.
Related Links	http://dx.doi.org/10.1128/iai.72.12.7045-7054.2004
Ending Page	7054
Page Count	10
Starting Page	7045
File Format	PDF
ISSN	00199567
e-ISSN	10985522
Journal	Infection and Immunity
Issue Number	12
Volume Number	72
Language	English
Publisher	American Society for Microbiology
Publisher Date	2004-12-01
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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