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01.06.2014 | Original Research Paper | Ausgabe 6/2014

Inflammation Research 6/2014

Swertiamarin ameliorates inflammation and osteoclastogenesis intermediates in IL-1β induced rat fibroblast-like synoviocytes

Zeitschrift:
Inflammation Research > Ausgabe 6/2014
Autoren:
S. Saravanan, V. I. Hairul Islam, K. Thirugnanasambantham, N. Pazhanivel, N. Raghuraman, M. Gabriel Paulraj, S. Ignacimuthu
Wichtige Hinweise
Responsible Editor: Liwu Li.

Abstract

Objective and design

Rheumatoid arthritis is a chronic inflammatory and autoimmune disease that leads to aggressive joint cartilage and bone destruction. Swertiamarin is a secoiridoid glycoside found in Enicostema axillare (Lam) A. Raynal, a medicinal plant used in the Indian system of traditional medicine. In the present study, the potential of swertiamarin was evaluated in IL-1β induced fibroblast-like synoviocytes (FLS).

Methods

The FLS were isolated from Freund’s Complete Adjuvant induced arthritic (AA) rats and cultured with IL-1β. The normal FLS and AA-FLS were cultured and used for subsequent experiment in fibroblastic morphology form. The efficacy of swertiamarin (10–50 μg/ml) was evaluated on mRNA and protein expression levels of inflammatory and osteoclastogenesis mediators. The efficacy was also evaluated on p38 MAPKα levels with time course studies (2, 4, 6, 8 and 12 h).

Results

IL-1β induced cell proliferation (149.46 ± 13.73 %) and NO production (162.03 ± 11.03 %) in AA-FLS; treatment with swertiamarin controlled proliferation (82.77 ± 4.22 %) and NO production (82.06 ± 3.91 % at 50 μg/ml) in a dose-dependent manner. It also significantly (P < 0.05) modulated the expression of apoptotic marker (caspase 3), proinflammation mediators (TNFα, IL-6, PGE2, COX-2, iNOS, MMPs) and osteoclastogenic mediator (RANKL) at both the mRNA and protein levels. Treatment with swertiamarin inhibited the levels of p38 MAPKα in a dose-dependent manner and also significantly (P < 0.05) attenuated the release of the same in time dependent mode.

Conclusion

These findings suggest that treatment with swertiamarin attenuated IL-1β induced FLS, and it revealed anti-inflammatory potential by attenuating aggressive FLS.

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