1, 25(OH)2D3 and calcipotriol, its hypocalcemic analog, exert a long-lasting anti-inflammatory and anti-proliferative effect in synoviocytes cultured from patients with rheumatoid arthritis and osteoarthritis. Issue 173 (October 2017)

• Record Type: Journal Article
• Authors: Huhtakangas, Johanna A.; Veijola, Johanna; Turunen, Sanna; Karjalainen, Anna; Valkealahti, Maarit; Nousiainen, Tomi; Yli-Luukko, Susanna; Vuolteenaho, Olli; Lehenkari, Petri
• Is Part Of: Journal of steroid biochemistry and molecular biology. Issue 173(2017)
• Page Start: 13
• Page End: 22
• Publication Date: 2017-10
• Subjects: Rheumatoid arthritis -- Osteoarthritis -- 1, 25(OH)2D3 -- Calcipotriol -- Cytokines -- Synovial stromal cells -- Apoptosis; RA rheumatoid arthritis -- OA osteoarthritis -- SSC synovial stromal cells -- MTT (3, (4, 5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide); Steroid hormones -- Periodicals; Biochemistry -- Periodicals; Hormones -- Periodicals; Molecular Biology -- Periodicals; Hormones stéroïdes -- Périodiques; Steroid hormones; Periodicals; 572.579
• DOI: 10.1016/j.jsbmb.2017.01.017
• Languages: English
• ISSNs: 0960-0760

Abstract

Highlights: Inflammatory cytokines secreted by synovial stromal cells of patients with rheumatoid arthritis or osteoarthritis may play a role in disease pathogenesis. 1, 25(OH)2 D3 and calcipotriol, its hypocalcemic analog, are strong negative regulators of cell proliferation and cytokine secretion in synovial stromal cells. This in-vitro study suggests a potential advantageous effect of calcipotriol in treatment of arthritis, but it should be further addressed in a separate in vivo study. Abstract: Objectives: We investigated the effects of 1, 25-dihydroxy vitamin D3 (1, 25(OH)2 D3 ), i.e. biologically active vitamin D and calcipotriol, a vitamin D analog, on growth and secretion of inflammatory mediators in synovial stromal cells (SSC) of patients with rheumatoid arthritis (RA) or osteoarthritis (OA). Methods: Synovial stromal cells (SSC) isolated during knee prosthesis surgery from four patients with RA and four with OA were exposed to 1, 25(OH)2 D3 or calcipotriol with or without stimulation of cells with IL-1β or TNF-α. The proliferation of cells was studied by MTT assay. Levels of cytokines were analyzed by a magnetic bead–based multiplex assay (a panel of 27 important cytokines and IL-6 alone) and RT-PCR was used to validate the concentrations of the key cytokines secreted by SSC. The vitamin D receptor (VDR) was visualized by immunofluorescence in SSC and by immunohistochemistry in the synovial tissues of three RA and three OA patients. Results: We detected intense staining for VDR in the synovial lining and vascular endothelium in tissue sections from all our RA and OA patients. Both 1, 25(OH)2 D3 and calcipotriol inhibited SSC proliferation for a prolonged time (up to 23 days with calcipotriol), but dexamethasone tended to increase SSC proliferation in a 4-day culture. 1, 25(OH)2 D3, calcipotriol and dexamethasone reduced the secretion of most inflammatory factors. Calcipotriol and dexamethasone additively reduced the secretions of IL-6, IFN-γ, basic FGF and VEGF in TNF-α stimulated SSC. The level of IL-6 was still diminished at 10 days after exposure, emphasizing the long-term impact of calcipotriol on SSC. Conclusions: Exposure for 24–48 h to 1, 25(OH)2 D3 or calcipotriol causes a long-lasting inhibition of cell proliferation and cytokine production in SSC in vitro .