Journal article
Role of T Cells and Gamma Interferon during Induction of Hypersensitivity to Lipopolysaccharide by Toxic Shock Syndrome Toxin 1 in Mice
Infection and immunity, Vol.69(3), pp.1256-1264
03/2001
DOI: 10.1128/IAI.69.3.1256-1264.2001
PMCID: PMC98015
PMID: 11179286
Abstract
The superantigenic function of toxic shock syndrome toxin 1 (TSST-1) is generally regarded as an important determinant of its lethal effects in humans or experimental animals. This study examined the role of superantigenicity in a BALB/c mouse model of lethal TSST-1-induced hypersensitivity to lipopolysaccharide (LPS). In this model, TSST-1 greatly potentiated both LPS-induced lethality, as well as LPS-induced serum tumor necrosis factor alpha (TNF-α) activity. Although BALB/c-SCID mice were resistant to these LPS enhancement effects of TSST-1, BALB/c-SCID mice reconstituted with T cells were completely susceptible to the enhancement effect of TSST-1 on LPS-induced serum TNF-α. Mice pretreated with cyclosporine (Cs) or neutralizing antibodies against gamma interferon (IFN-γ) did not develop lethal LPS hypersensitivity when injected with TSST-1, and these agents reduced the enhancement effect of TSST-1 on LPS-induced serum TNF-α by 99 and 85%, respectively. Cs pretreatment also completely inhibited the known capacity of TSST-1 to amplify LPS-induced levels of IFN-γ in serum. In contrast, mice given Cs after a priming injection of TSST-1, but before LPS, still exhibited lethal hypersensitivity to LPS. Cs given after TSST-1 also did not inhibit enhancement of LPS-induced serum TNF-α by TSST-1 but inhibited the enhancement effect of TSST-1 on LPS-induced serum IFN-γ by 50%. These experiments support the theory that TSST-1-induced hypersensitivity to LPS is mediated primarily by IFN-γ derived from superantigen-activated T cells.
Details
- Title: Subtitle
- Role of T Cells and Gamma Interferon during Induction of Hypersensitivity to Lipopolysaccharide by Toxic Shock Syndrome Toxin 1 in Mice
- Creators
- Martin M Dinges - Department of Microbiology, University of Minnesota Medical School, Minneapolis, Minnesota 55455Patrick M Schlievert - Department of Microbiology, University of Minnesota Medical School, Minneapolis, Minnesota 55455
- Resource Type
- Journal article
- Publication Details
- Infection and immunity, Vol.69(3), pp.1256-1264
- DOI
- 10.1128/IAI.69.3.1256-1264.2001
- PMID
- 11179286
- PMCID
- PMC98015
- NLM abbreviation
- Infect Immun
- ISSN
- 0019-9567
- eISSN
- 1098-5522
- Publisher
- American Society for Microbiology
- Language
- English
- Date published
- 03/2001
- Academic Unit
- Microbiology and Immunology; Internal Medicine
- Record Identifier
- 9984001219502771
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