IL-40 is up-regulated in the synovial fluid and cartilage of osteoarthritis patients and contributes to the alteration of chondrocytes phenotype in vitro

Autor: L. Andrés Cerezo, A. Navrátilová, M. Kuklová, A. Prokopcová, J. Baloun, T. Kropáčková, D. Veigl, S. Popelka, P. Fulín, R. Ballay, K. Pavelka, J. Vencovský, L. Šenolt
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Arthritis Research & Therapy, Vol 26, Iss 1, Pp 1-7 (2024)
Druh dokumentu: article
ISSN: 1478-6362
DOI: 10.1186/s13075-024-03372-z
Popis: Abstract Introduction IL-40 is a novel cytokine associated with autoimmune connective tissue disorders such as rheumatoid arthritis (RA) or Sjögren syndrome. We have previously shown an accumulation of IL-40 in the RA joint and its expression by immune cells and fibroblasts. Therefore, we aimed to assess the role of IL-40 in association with hyaline cartilage and chondrocyte activity. Methods Immunohistochemistry was employed to detect IL-40 in paired samples of loaded and unloaded regions of osteoarthritis (OA) cartilage (n=5). Synovial fluid IL-40 was analysed by ELISA in OA (n=31) and control individuals after knee injury (n=34). The impact of IL-40 on chondrocytes was tested in vitro. Results IL-40 was found in chondrocytes of the superficial zone of the OA cartilage, both in loaded and unloaded explants. Additionally, only biopsies from loaded explants showed significant IL-40 positivity in transitional zone chondrocytes. Levels of IL-40 were significantly elevated in the synovial fluid from OA patients compared to controls (p
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