Abstract
Scrophularia buergeriana Miquel (Scrophulariaceae, SB) is a biennial plant native to Korea, northern China, and Japan that plays an important role in traditional medicine. The dried root of SB has long been used in oriental medicine for treatment of fever, swelling, constipation, pharyngitis, neuritis, and laryngitis. In the present study, we evaluated the ethanol extract of SB (SBE) to determine if it exerted any anti-allergic effects that had not previously been demonstrated. SBE markedly inhibited β-hexosaminidase and histamine release and suppressed the expression of tumor necrosis factor-α and interleukin-4 cytokines by RBL-2H3 mast cells. In addition, topical treatment with SBE effectively reduced allergic inflammation in a dinitrofluorobenzene-induced contact hypersensitivity mouse model. These results strongly suggest that SBE is a promising source of anti-allergic agents.
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