Journal
OSTEOARTHRITIS AND CARTILAGE
Volume 26, Issue 8, Pages 1127-1135Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.joca.2018.05.005
Keywords
Osteoarthritis; Cytokines; DMOAD; Cartilage; Pain
Categories
Funding
- Dutch Arthritis Association [NR 12-2-202]
- Life Sciences and Health The Netherlands [LSH IMPULSE (40-43100-98007)]
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Objective: Effective disease-modifying drugs for osteoarthritis (DMOAD) should preferably have chondroprotective, anti-inflammatory, and analgesic activity combined in a single molecule. We developed a fusion protein of IL4 and IL10 (IL4-10 FP), in which the biological activity of both cytokines is preserved. The present study evaluates the chondroprotective, anti-inflammatory, and analgesic activity of IL4-10 FP in in vitro and in vivo models of osteoarthritis. Methods: Human osteoarthritic cartilage tissue and synovial tissue were cultured with IL4-10 FP. Cartilage proteoglycan turnover and release of pro-inflammatory, catabolic, and pain mediators by cartilage and synovial tissue were measured. The analgesic effect of intra-articularly injected IL4-10 FP was evaluated in a canine model of osteoarthritis by force-plate analysis. Results: IL4-10 FP increased synthesis (P = 0.018) and decreased release (P = 0.018) of proteoglycans by osteoarthritic cartilage. Release of pro-inflammatory IL6 and IL8 by cartilage and synovial tissue was reduced in the presence of IL4-10 FP (all P < 0.05). The release of MMP3 by osteoarthritic cartilage and synovial tissue was decreased (P = 0.018 and 0.028) whereas TIMP1 production was not significantly changed. Furthermore, IL4-10 FP protected cartilage against destructive properties of synovial tissue mediators shown by the increased cartilage proteoglycan synthesis (P = 0.0235) and reduced proteoglycan release (P = 0.0163). Finally, intra-articular injection of IL4-10 FP improved the deficient joint loading in dogs with experimentally induced osteoarthritis. Conclusion: The results of current preliminary study suggest that IL4-10 FP has DMOAD potentials since it shows chondroprotective and anti-inflammatory effects in vitro, as well as potentially analgesic effect in a canine in vivo model of osteoarthritis. (c) 2018 Osteoarthritis Research Society International. Published by Elsevier Ltd. All rights reserved.
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