ABSTRACT
Lipopolysaccharides (LPS) strongly stimulate immune cells, and unabated activation of immune system by LPS may lead to an exacerbation of sickness and depression. In this study, stigmasta-3,5-dien-7-one (ST) was isolated from Phragmitis rhizoma as a negative regulator of LPS-induced inflammation in macrophages. ST effectively reduced nitric oxide (NO), prostaglandin E2, and pro-inflammatory cytokine levels, which were markedly raised by LPS treatment. In addition, ST blocked the nuclear factor-kappa B (NF-κB) signaling pathway via down-regulation of phospho-p38 mitogen-activated protein kinase and phosphorylation and degradation of the inhibitor of NF-κB α. To our knowledge, this is the first study showing anti-inflammatory activities of ST isolated from Phragmitis rhizoma.
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ACKNOWLEDGMENTS
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (No.2012R1A5A2A42671316) and partly by the Technology R&D Program funded by the Small and Medium Business Administration (SMBA, Korea).
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The authors declare that they have no competing interests.
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Sook Jahr Park and Young Woo Kim contributed equally to this work.
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Park, S.J., Kim, Y.W., Park, M.K. et al. Anti-inflammatory Steroid from Phragmitis rhizoma Modulates LPS-Mediated Signaling Through Inhibition of NF-κB Pathway. Inflammation 39, 727–734 (2016). https://doi.org/10.1007/s10753-015-0299-6
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DOI: https://doi.org/10.1007/s10753-015-0299-6