Ruta graveolens L. (Rutaceae) are traditionally used for the treatment of rheumatism, arthritis and other inflammatory conditions in the traditional medicine of India. The purpose of this study was to investigate anti-inflammatory and anti-oxidant effects of methanolic extract of Ruta graveolens L. in adjuvant induced arthritis in rats. Methanolic extract of Ruta graveolens (MER) exhibited maximum percentage of oedema inhibition at a dose of 20 mg/kg on 21st day of adjuvant arthritis. The effect was higher than that of standard drug indomethacin. The activities of cycloxygenase-2 and myeloperoxidase and concentration of thiobarbituric acid reactive substance (TBARS) were decreased and the activities of antioxidant enzymes, vitamins C & E and reduced glutathione level were increased on treatment with MER. The increment in ESR and total WBC, reduction in RBC count and haemoglobin and aberrant changes to the C-reactive protein (CRP) and ceruloplasmin levels observed in the arthritic animals were also found to be significantly restored in MER treated rats. Histopathology of paw tissue showed decreased oedema formation and cellular infiltration on supplementation with MER. Thus the results demonstrated the potential beneficiary effect of methanolic extract of Ruta graveolens on adjuvant induced arthritis in rats.
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