Characterization of fibroblast-like synoviocytes from the synovial fluid of patients affected by juvenile idiopathic arthritis
Authors' conclusion
FLSs from the SF of JIA patients display a phenotype that has pro-inflammatory, rather than tissue-disruptive, activity; this is similar to what is observed in cells from the sublining region of the SM in adult arthritis patients. In addition, they show chondrogenic ability, indicating the potential for SF-FLSs as an in vitro model for chondrocytes.
Study context
- Population
- Patients with Juvenile Idiopathic Arthritis (JIA) with active disease undergoing therapeutic arthrocentesis; FLSs isolated from synovial fluid
- Outcome
- Phenotypic and functional characteristics of SF-FLSs
Methodological detailsSurface markers by cytofluorimetry; cytokine and MMP gene expression by quantitative RT-PCR (qRT-PCR); chondrogenic properties by Alcian-Blue staining
- Surface markers by cytofluorimetry; cytokine and MMP gene expression by qRT-PCR; chondrogenic properties by Alcian-Blue staining
Main finding
As reported in the abstract
- SF-FLSs display a CD45-,CD34-,CD90+,PDPN+ phenotype
- Significant increase in expression of genes coding for pro-inflammatory cytokines, but not MMPs, when treated with TNF-α
- SF-FLSs express the chondrogenic genes BMP4 and Aggrecan (AGG)
- Ability to differentiate towards a chondrocyte-like phenotype when cultured in TGF-β-enriched medium
Original publication
Characterization of fibroblast-like synoviocytes from the synovial fluid of patients affected by juvenile idiopathic arthritis. Rheumatology (Oxford). Published 23 May 2025. doi:10.
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