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Peperomins as anti-inflammatory agents that inhibit the NF-kappaB signaling pathway
Chieko Tsutsui1, Yuriko Yamada, Masayoshi Ando
1Department of Applied Biology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
Abstract:
The transcription factor nuclear factor kappaB (NF-kappaB) induces the expression of various inflammatory genes. In the common NF-kappaB signaling pathway, peperomin E and 2,6-didehydropeperomin B inhibited IkappaB degradation upon stimulation with TNF-alpha or interleukin-1. Consistent with these results, peperomin E and 2,6-didehydropeperomin B blocked the TNF-alpha-induced activation of IkappaB kinase, while they had no direct effect on the IkappaB kinase activity. Our present results clearly demonstrate that peperomins inhibit the NF-kappaB signaling pathway by blocking IkappaB kinase activation.
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