Scriba, Thomas J., Sierro, Sophie, Brown, Eric L., Phillips, Rodney E., Sewell, Andrew K.  ORCID: https://orcid.org/0000-0003-3194-3135 and Massey, Ruth C.
2008.
The staphyloccous aureus eap protein activates expression of proinflammatory cytokines.
Infection and Immunity
76
(5)
, pp. 2164-2168.
10.1128/IAI.01699-07
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Abstract
The extracellular adhesion protein (Eap) secreted by the major human pathogen Staphylococcus aureus is known to have several effects on human immunity. We have recently added to knowledge of these roles by demonstrating that Eap enhances interactions between major histocompatibility complex molecules and human leukocytes. Several studies have indicated that Eap can induce cytokine production by human peripheral blood mononuclear cells (PBMCs). To date, there has been no rigorous attempt to identify the breadth of cytokines produced by Eap stimulation or to identify the cell subsets that respond. Here, we demonstrate that Eap induces the secretion of the proinflammatory cytokines interleukin 6 (IL-6) and tumor necrosis factor alpha (TNF-α) by CD14+ leukocytes (monocytes and macrophages) within direct ex vivo PBMC populations (note that granulocytes are also CD14+ but are largely depleted from PBMC preparations). Anti-intercellular adhesion molecule 1 (CD54) antibodies inhibited this induction and implicated a role for this known Eap binding protein in cellular activation. IL-6 and TNF-α secretion by murine cells exposed to Eap was also observed. The activation of CD14+ cells by Eap suggests that it could play a significant role in both septic shock and fever, two of the major pathological features of S. aureus infections.
| Item Type: | Article |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Medicine Systems Immunity Research Institute (SIURI) |
| Subjects: | Q Science > QR Microbiology > QR180 Immunology |
| Additional Information: | Pdf uploaded in accordance with publisher's policy at http://www.sherpa.ac.uk/romeo/issn/0019-9567/ (accessed 24/02/2014) |
| Publisher: | American Society for Microbiology |
| ISSN: | 0019-9567 |
| Date of First Compliant Deposit: | 30 March 2016 |
| Last Modified: | 10 May 2023 01:12 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/27410 |
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