NDLI: Pneumolysin-Dependent and -Independent Gene Expression Identified by cDNA Microarray Analysis of THP-1 Human Mononuclear Cells Stimulated by Streptococcus pneumoniae

Content Provider	PubMed Central
Author	Rogers, P. David Thornton, Justin Barker, Katherine S. Mcdaniel, D. Olga Sacks, Gordon S. Swiatlo, Edwin Mcdaniel, Larry S.
Copyright Year	2003
Abstract	Pneumolysin is an important virulence factor of Streptococcus pneumoniae, interacting with the membranes of host cells to elicit a multitude of inflammatory responses. We used cDNA microarrays to identify genes which are responsive to S. pneumoniae in a pneumolysin-dependent and -independent fashion. The THP-1 human monocytic cell line was coincubated for 3 h with medium alone, with the virulent type 2 S. pneumoniae strain D39, or with the isogenic strain PLN, which does not express pneumolysin. RNA was isolated from the monocytes and hybridized on cDNA microarrays. Of 4,133 genes evaluated, 142 were found to be responsive in a pneumolysin-dependent fashion, whereas 40 were found to be responsive independent of pneumolysin. Genes that were up-regulated in cells exposed to D39 relative to those exposed to PLN included genes encoding proteins such as mannose binding lectin 1, lysozyme, α-1 catenin, cadherin 17, caspases 4 and 6, macrophage inflammatory protein 1β (MIP-1β), interleukin 8 (IL-8), monocyte chemotactic protein 3 (MCP-3), IL-2 receptor β (IL-2Rβ), IL-15 receptor α (IL-15Rα), interferon receptor 2, and prostaglandin E synthase. Down-regulated genes included those encoding complement component receptor 2/CD21, platelet-activating factor acetylhydrolase, and oxidized low-density lipoprotein receptor 1 (OLR1). Pneumolysin-independent responses included down-regulation of the genes encoding CD68, CD53, CD24, transforming growth factor β2, and signal transducers and activators of transcription 1. These results demonstrate the striking effects of pneumolysin on the host cell upon exposure to S. pneumoniae.
Related Links	http://dx.doi.org/10.1128/iai.71.4.2087-2094.2003
Ending Page	2094
Page Count	8
Starting Page	2087
File Format	PDF
ISSN	00199567
e-ISSN	10985522
Journal	Infection and Immunity
Issue Number	4
Volume Number	71
Language	English
Publisher	American Society for Microbiology
Publisher Date	2003-04-01
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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