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The Impact of Staphylococcus aureus-Associated Molecular Patterns on Staphylococcal Superantigen-Induced Toxic Shock Syndrome and Pneumonia
Joint Authors
Karau, Melissa J.
Tilahun, Ashenafi Y.
Ballard, Alessandro
Gunaratna, Miluka P.
Thapa, Anusa
David, Chella S.
Rajagopalan, Govindarajan
Patel, Robin
Source
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-13, 13 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-06-12
Country of Publication
Egypt
No. of Pages
13
Main Subjects
Abstract EN
Staphylococcus aureus is capable of causing a spectrum of human illnesses.
During serious S.
aureus infections, the staphylococcal pathogen-associated molecular patterns (PAMPs) such as peptidoglycan, lipoteichoic acid, and lipoproteins and even intact S.
aureus, are believed to act in conjunction with the staphylococcal superantigens (SSAg) to activate the innate and adaptive immune system, respectively, and cause immunopathology.
However, recent studies have shown that staphylococcal PAMPs could suppress inflammation by several mechanisms and protect from staphylococcal toxic shock syndrome, a life-threatening systemic disease caused by toxigenic S.
aureus.
Given the contradictory pro- and anti-inflammatory roles of staphylococcal PAMPs, we examined the effects of S.
aureus-derived molecular patterns on immune responses driven by SSAg in vivo using HLA-DR3 and HLA-DQ8 transgenic mice.
Our study showed that neither S.
aureus-derived peptidoglycans (PGN), lipoteichoic acid (LTA), nor heat-killed Staphylococcus aureus (HKSA) inhibited SSAg-induced T cell proliferation in vitro.
They failed to antagonize the immunostimulatory effects of SSAg in vivo as determined by their inability to attenuate systemic cytokine/chemokine response and reduce SSAg-induced T cell expansion.
These staphylococcal PAMPs also failed to protect HLA-DR3 as well as HLA-DQ8 transgenic mice from either SSAg-induced toxic shock or pneumonia induced by a SSAg-producing strain of S.
aureus.
American Psychological Association (APA)
Tilahun, Ashenafi Y.& Karau, Melissa J.& Ballard, Alessandro& Gunaratna, Miluka P.& Thapa, Anusa& David, Chella S.…[et al.]. 2014. The Impact of Staphylococcus aureus-Associated Molecular Patterns on Staphylococcal Superantigen-Induced Toxic Shock Syndrome and Pneumonia. Mediators of Inflammation،Vol. 2014, no. 2014, pp.1-13.
https://search.emarefa.net/detail/BIM-1043579
Modern Language Association (MLA)
Tilahun, Ashenafi Y.…[et al.]. The Impact of Staphylococcus aureus-Associated Molecular Patterns on Staphylococcal Superantigen-Induced Toxic Shock Syndrome and Pneumonia. Mediators of Inflammation No. 2014 (2014), pp.1-13.
https://search.emarefa.net/detail/BIM-1043579
American Medical Association (AMA)
Tilahun, Ashenafi Y.& Karau, Melissa J.& Ballard, Alessandro& Gunaratna, Miluka P.& Thapa, Anusa& David, Chella S.…[et al.]. The Impact of Staphylococcus aureus-Associated Molecular Patterns on Staphylococcal Superantigen-Induced Toxic Shock Syndrome and Pneumonia. Mediators of Inflammation. 2014. Vol. 2014, no. 2014, pp.1-13.
https://search.emarefa.net/detail/BIM-1043579
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1043579