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Immunomodulatory ef...
Immunomodulatory effects exerted by extracellular vesicles from Staphylococcus epidermidis and Staphylococcus aureus isolated from bone-anchored prostheses
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- Zaborowska, Magdalena, 1984 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för kliniska vetenskaper, Avdelningen för biomaterialvetenskap,CARe - Centrum för antibiotikaresistensforskning,Institute of Clinical Sciences, Department of Biomaterials,Centre for antibiotic resistance research, CARe
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- Vazirisani, Forugh, 1967 (author)
- Gothenburg University,Göteborgs universitet,CARe - Centrum för antibiotikaresistensforskning,Institutionen för kliniska vetenskaper, Avdelningen för biomaterialvetenskap,Centre for antibiotic resistance research, CARe,Institute of Clinical Sciences, Department of Biomaterials
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- Shah, Furqan A. (author)
- Gothenburg University,Göteborgs universitet,Institutionen för kliniska vetenskaper, Avdelningen för biomaterialvetenskap,Institute of Clinical Sciences, Department of Biomaterials
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- Firdaus, Rininta (author)
- Gothenburg University,Göteborgs universitet,CARe - Centrum för antibiotikaresistensforskning,Institutionen för kliniska vetenskaper, Avdelningen för biomaterialvetenskap,Centre for antibiotic resistance research, CARe,Institute of Clinical Sciences, Department of Biomaterials
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- Omar, Omar (author)
- Gothenburg University,Göteborgs universitet,Institutionen för kliniska vetenskaper, Avdelningen för biomaterialvetenskap,Institute of Clinical Sciences, Department of Biomaterials
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- Ekström, Karin, 1978 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för kliniska vetenskaper, Avdelningen för biomaterialvetenskap,Institute of Clinical Sciences, Department of Biomaterials
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- Trobos, Margarita, 1980 (author)
- Gothenburg University,Göteborgs universitet,CARe - Centrum för antibiotikaresistensforskning,Institutionen för kliniska vetenskaper, Avdelningen för biomaterialvetenskap,Centre for antibiotic resistance research, CARe,Institute of Clinical Sciences, Department of Biomaterials
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- Thomsen, Peter, 1953 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för kliniska vetenskaper, Avdelningen för biomaterialvetenskap,Institute of Clinical Sciences, Department of Biomaterials
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(creator_code:org_t)
- Elsevier BV, 2021
- 2021
- English.
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In: Biomaterials. - : Elsevier BV. - 0142-9612. ; 278
- Related links:
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https://doi.org/10.1...
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Abstract
Subject headings
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- Staphylococcus aureus and Staphylococcus epidermidis are the bacteria that most frequently cause osteomyelitis. This study aimed to determine whether staphylococci isolated from osteomyelitis associated with septic loosening of orthopedic prostheses release extracellular vesicles (EVs) and, if so, to determine tentative immunomodulatory effects on the human monocytic cell line THP-1. EVs were isolated from bacterial cultures using filtration and ultracentrifugation and characterized by scanning electron microscopy, nanoparticle tracking analysis and Western Blot. The cytotoxic effect of EVs was analyzed by Nucleo Counter and lactate dehydrogenase (LDH) analyses. Confocal laser scanning microscopy was employed to visualize the uptake of EVs by THP-1 cells. Activation of the transcription factor nuclear factor-kappa B (NF-kappa B) was determined in THP1-Blue T NF-kappa B cells, and the gene expression and secretion of cytokines were determined by quantitative polymerase chain reaction and enzyme-linked immunosorbent assay, respectively. All investigated strains, irrespective of their biofilm formation ability, were able to secrete EVs in vitro. The S. aureus strains produced significantly more EVs than the S. epidermidis strains. Both S. aureus-derived EVs and S. epidermidis-derived EVs were internalized by THP-1 cells, upregulated Toll-like receptor 3 (TLR3) gene expression, activated NF-kappa B, and promoted the gene expression and secretion of interleukin (IL)-8, monocyte chemoattractant protein (MCP)-1, matrix metallopeptidase (MMP)-9 and IL-10. Whereas EVs from both staphylococcal species upregulated the proapoptotic DNA damage-inducible transcript 4 (DDIT4) gene and downregulated the antiapoptotic B-cell lymphoma 2 (Bcl-2) gene, cytolysis was preferentially induced in S. aureus EV-stimulated cells, possibly related to the expression of cytolytic proteins predominantly in S. aureus EVs. In conclusion, staphylococcal EVs possess potent cytolytic and immunomodulatory properties.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine (hsv//eng)
Keyword
- Chemokines
- Cytokines
- Cytotoxicity
- Biomaterial-associated infection
- Extracellular vesicles
- Monocyte
- Macrophage
- Inflammation
- Staphylococci
- THP-1
- gram-positive bacteria
- mammalian target
- gene-expression
- infections
- brain
- inflammation
- activation
- biofilms
- rtp801
- death
- Engineering
- Materials Science
Publication and Content Type
- ref (subject category)
- art (subject category)
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Zaborowska, Magd ...
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Vazirisani, Foru ...
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Shah, Furqan A.
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Firdaus, Rininta
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Omar, Omar
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Ekström, Karin, ...
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Trobos, Margarit ...
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Thomsen, Peter, ...
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- About the subject
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- MEDICAL AND HEALTH SCIENCES
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MEDICAL AND HEAL ...
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and Clinical Medicin ...
- Articles in the publication
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Biomaterials
- By the university
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University of Gothenburg