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Kang, B.Y. et al.

Inhibition of interleukin-12 production in lipopolysaccharide-activated mouse macrophages by parthenolide, a predominant sesquiterpene lactone in Tanacetum parthenium: involvement of nuclear factor-kappaB.

Pharmacological control of interleukin-12 (IL-12) production may be a key therapeutic strategy for modulating immunological diseases dominated by type-1 cytokine responses. In this study, we investigated the effects of parthenolide, an anti-inflammatory sesquiterpene, on the production of IL-12 from mouse macrophages stimulated with lipopolysaccharide (LPS). Parthenolide potently inhibited the LPS-induced IL-12 production in a dose-dependent manner. The effect of parthenolide on IL-12 p40 promoter activation was analyzed by transfecting RAW264.7 monocytic cells with p40 promoter/luciferase constructs. The repressive effect mapped to a region in the p40 promoter containing a binding site for nuclear factor-kappaB (p40-kappaB). Furthermore, activation of macrophages by LPS resulted in markedly enhanced binding activity to the kappaB site, which significantly decreased upon addition of parthenolide. These results suggest that parthenolide-induced inhibition of IL-12 production in macrophages may explain some of the biological effects of parthenolide including its anti-inflammatory activity.[1]

References

Inhibition of interleukin-12 production in lipopolysaccharide-activated mouse macrophages by parthenolide, a predominant sesquiterpene lactone in Tanacetum parthenium: involvement of nuclear factor-kappaB. Kang, B.Y., Chung, S.W., Kim, T.S. Immunol. Lett. (2001) [Pubmed]

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