Effect of an herbal mixture of Cinnamon Cortex, Persicae Semen, and Natril Sulfas on collagen-induced arthritis and lipopolysaccharides-induced nuclear factor-κ B signaling.
Từ khóa
trừu tượng
OBJECTIVE
To investigate the anti-arthritic and anti-inflammatory effects of the mixture of three herbal agents, Cinnamon Cortex, Persica Semen, and Natril Sulfas (CPN), the major ingredients of Taoren Chengqi Decoction ().
METHODS
Collagen-induced arthritis (CIA) was induced by immunization with bovine type II collagen on day 1 and 21. DBA/1J mice were orally administered the water extract of CPN (100 and 500 mg/kg) and indomethacin (1 mg/kg) or vehicle (water) 3 times per week for 6 weeks. Arthritic symptoms were recorded on day 29, 31, 33, 36 and 38. On sacrififi ce, serum was obtained for inflammatory markers and anti-collagen antibodies as well as arthritic joints were obtained for histologic analysis. For the evaluation of in vitro anti-inflammatory mechanism of CPN, peritoneal macrophages were isolated from thioglycollate injected C57BL/6 mice and stimulated with lipopolysaccharides (LPS) for 15 min in the presence of CPN extract. Levels of inhibitor of NF-κB α isoform (IκBα), phospho-p38, phospho-C-Jun N-terminal kinases (JNK) and phospho-extracellular signal-regulated kinase 1/2 (ERK1/2) were detected by Western blot.
RESULTS
Compared with mice in CIA group, oral administration of CPN signififi cantly reduced the clinical scores (P<0.05), histological analysis revealed the protective effect of CPN on inflamed joints. Serum levels of the pro-inflammatory markers tumor necrosis factor-α, interleukin-6 and prostaglandin E2, but not anti-collagen antibodies, were significantly reduced (P<0.05). CPN did not affect the activation of p38, JNK and ERK1/2 but inhibited LPS-induced IκBα degradation, a required event prior to the translocation of NF-κB to the nucleus.
CONCLUSIONS
The ameliorating effect of CPN on arthritis progression seems to be mediated by its anti-inflammatory effect, without affecting antibody response. As a supplementary agent, CPN could be benefifi cial for treatment of CIA.
