Role of Sinomenine on Complete Freund's Adjuvant‐Induced Arthritis in Rats

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Abstract
The investigation was undertaken to evaluate the effect of sinomenine (Sin) on experimental adjuvant arthritis rats stimulated by Freund's complete adjuvant and explore the corresponding potential molecular mechanism. The content of proinflammatory cytokines such as tumor necrosis factor‐alpha, interleukin‐1 beta and interleukin‐6 were detected. Besides, canonical nuclear factor kappa B (NF‐κB) pathway was also assessed to evaluate the antiarthritic potential of sinomenine. Pathological sections of rat paws showed sinomenine and diclofenac sodium significantly alleviated articular cartilage lesion, cellular infiltration, epithelial cell degeneration, synovial tissue vasodilation and congestion. The phosphorylations of inhibitor of kappaB alpha and NF‐κB subunit p65 were downregulated with the treatment of sinomenine in dose dependent manners, as well as proinflammatory cytokines. Therefore, it was assumed that sinomenine might be a new therapeutic candidate to treat arthritis. © 2016 IUBMB Life, 68(6):429–435, 2016

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