NDLI: Gene Expression and Production of Tumor Necrosis Factor Alpha, Interleukin-1β (IL-1β), IL-8, Macrophage Inflammatory Protein 1α (MIP-1α), MIP-1β, and Gamma Interferon-Inducible Protein 10 by Human Neutrophils Stimulated with Group B Meningococcal Outer Membrane Vesicles

Content Provider	PubMed Central
Author	Lapinet, José A. Scapini, Patrizia Calzetti, Federica Pérez, Oliver Cassatella, Marco A.
Editor	Kaufmann, S. H. E.
Copyright Year	2000
Abstract	Accumulation of polymorphonuclear neutrophils (PMN) into the subarachnoidal space is one of the hallmarks of Neisseria meningitidis infection. In this study, we evaluated the ability of outer membrane vesicles (OMV) from N. meningitidis B to stimulate cytokine production by neutrophils. We found that PMN stimulated in vitro by OMV produce proinflammatory cytokines and chemokines including tumor necrosis factor alpha (TNF-α), interleukin-1β (IL-1β), IL-8, macrophage inflammatory protein 1α (MIP-1α), and MIP-1β. A considerable induction of gamma interferon (IFN-γ)-inducible protein 10 (IP-10) mRNA transcripts, as well as extracellular IP-10 release, was also observed when neutrophils were stimulated by OMV in combination with IFN-γ. Furthermore, PMN stimulated by OMV in the presence of IFN-γ demonstrated an enhanced capacity to release TNF-α, IL-1β, IL-8, and MIP-1β compared to stimulation with OMV alone. In line with its downregulatory effects on neutrophil-derived proinflammatory cytokines, IL-10 potently inhibited TNF-α, IL-1β, IL-8, and MIP-1β production triggered by OMV. Finally, a neutralizing anti-TNF-α monoclonal antibody (MAb) did not influence the release of IL-8 and MIP-1β induced by OMV, therefore excluding a role for endogenous TNF-α in mediating the induction of chemokine release by OMV. In contrast, the ability of lipopolysaccharide from N. meningitidis B to induce the production of IL-8 and MIP-1β was significantly inhibited by anti-TNF-α MAb. Our results establish that, in response to OMV, neutrophils produce a proinflammatory profile of cytokines and chemokines which may not only play a role in the pathogenesis of meningitis but may also contribute to the development of protective immunity to serogroup B meningococci.
Starting Page	6917
File Format	PDF
ISSN	10985522
e-ISSN	10985522
Journal	Infection and Immunity
Issue Number	12
Volume Number	68
Language	English
Publisher	American Society for Microbiology
Publisher Date	2000-12-01
Access Restriction	Open
Rights Holder	American Society for Microbiology
Subject Keyword	Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Infectious Diseases Parasitology Immunology Microbiology

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