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31 May 2018 : Animal Research  

Protective Effects of Sinomenine Against Ankylosing Spondylitis and the Underlying Molecular Mechanisms

Bo Dong1ABCDEFG*

DOI: 10.12659/MSM.907589

Med Sci Monit 2018; 24: ANS3631-3636

Abstract

BACKGROUND: This study aimed to investigate the effect and underlying molecular mechanism of sinomenine (SIN) on ankylosing spondylitis (AS).

MATERIAL AND METHODS: To study the potential role of SIN in the pathogenesis of AS, an AS mouse model was established and mice were treated with different concentrations of SIN (10, 30, and 50 mg/kg, administered intraperitoneally). Markers of inflammation and oxidative stress were determined by ELISA assay. Western blot analysis and qRT-PCR were used to quantify the levels of related proteins and gene mRNA expression.

RESULTS: The results suggest that AS mice has higher levels of TNF-α, IL-1β, and IL-6 (p<0.01 for all), and lower levels of superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GSH-PX) (p<0.01 for all). SIN treatment reduced the level of TNF-α, IL-1β, and IL-6 in a dose-dependent manner, and the levels of SOD, CAT, and GSH-PX were dose-dependently increased (p<0.05 for all). The results also revealed that NF-κBp65 expression decreased, while the level of IkB increased, in a dose-dependent manner, after SIN treatment in AS mice (p<0.05 for all). The level of p-p38 was dose-dependently reduced in AS mice by SIN treatment (p<0.05). Moreover, SIN inhibited Cox-2 expression in AS mice in a dose-dependent manner (p<0.05).

CONCLUSIONS: SIN has a beneficial role in AS through suppressing inflammatory mediators and by down-regulating oxidative stress via inhibiting the MAPKp38/NF-kB pathway and Cox-2 expression.

Keywords: NF-kappa B, Oxidative Stress, p38 Mitogen-Activated Protein Kinases, Sinomenium, Spondylitis, Ankylosing

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750