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IL-17 producing mast cells contribute to synovial inflammation in non-psoriatic and psoriatic spondyloarthritis
- Source :
- Journal of Translational Medicine, Vol 9, Iss Suppl 2, p P47 (2011), Journal of Translational Medicine
- Publication Year :
- 2011
- Publisher :
- BMC, 2011.
-
Abstract
- Results In comparison with RA, synovial infiltration with C-kit positive mast cells was strongly and specifically increased in SpA, independently of the subtype (non-psoriatic versus psoriatic) and disease duration. Staining of mast cell granules with tryptase and toluidine blue as well as analysis of synovial fluid levels of histamine and tryptase did not indicate increased degranulation in SpA synovitis. Mast cells expressed significantly more IL-17 in SpA than RA synovitis and constituted the major IL-17 expressing cell population in SpA synovitis. Targeting mast cells with the c-kit inhibitor imatinib mesylate in ex vivo tissue cultures led to a significant decrease in the production of IL-17 as well as other pro-inflammatory cytokines. To confirm that mast cell infiltration is not a merely secondary, inflammationdependent feature of SpA, we assessed the impact of TNF blockade on mast cell infiltration in vivo. Analysis of paired synovial biopsies before and after treatment revealed that neither the number of mast cells nor the expression of IL-17 by mast cells was affected by effective TNF blockade in SpA.
- Subjects :
- Veterinary medicine
lcsh:Medicine
Tryptase
Inflammation
General Biochemistry, Genetics and Molecular Biology
chemistry.chemical_compound
Synovitis
medicine
Synovial fluid
Medicine(all)
biology
Biochemistry, Genetics and Molecular Biology(all)
business.industry
lcsh:R
Degranulation
General Medicine
medicine.disease
Mast cell
Imatinib mesylate
medicine.anatomical_structure
chemistry
Poster Presentation
Immunology
biology.protein
medicine.symptom
business
Histamine
Subjects
Details
- Language :
- English
- ISSN :
- 14795876
- Volume :
- 9
- Database :
- OpenAIRE
- Journal :
- Journal of Translational Medicine
- Accession number :
- edsair.doi.dedup.....a5a541bc4e2b286e564276cac8527f31