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Ethanol Extract of Potentilla supina Linne Suppresses LPS-induced Inflammatory Responses through NF-κB and AP-1 Inactivation in Macrophages and in Endotoxic mice.
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Hae-Jun Lee
Ji-Sun Shin
Kyoung-Goo Lee
Jung-Hwan Nam
Sang-Cheol Park
+2 authors
Journal:
2017/May
-
Phytotherapy Research
ISSN:
1099-1573
PUBMED:
28127806
DOI:
10.1002/ptr.5773
Abstract:
In this study, we investigated the antiinflammatory effects of ethanol extracts of Potentilla. supina Linne (EPS) in lipopolysaccharide (LPS)-induced RAW 264.7 macrophages and septic mice. EPS suppressed LPS-induced nitric oxide, prostaglandin E2 , TNF-α, interleukin-6 and interleukin-1β at production and mRNA levels in LPS-induced RAW 264.7 macrophages. Consistent with these observations, EPS attenuated the expressions of inducible nitric oxide synthase and cyclooxygenase-2 by downregulation of their promoter activities. Molecularly, EPS reduced the LPS-induced transcriptional activity and DNA-binding activity of nuclear factor-κB (NF-κB), and this was associated with a decrease of translocation and phosphorylation of p65 NF-κB by inhibiting the inhibitory κB-α degradation and IKK-α/β phosphorylation. Furthermore, EPS inhibited the LPS-induced activation of activator protein-1 by reducing the expression of c-Fos and c-Jun in nuclear. EPS also suppressed the phosphorylation of mitogen-activated protein kinase, such as p38 mitogen-activated protein kinase and c-Jun N-terminal kinase. In an LPS-induced endotoxemia mouse model, pretreatment with EPS reduced the mRNA levels of inducible nitric oxide synthase, cyclooxygenase-2 and proinflammatory cytokines and increased the survival rate of mice. Collectively, these results suggest that the antiinflammatory effects of EPS were associated with the suppression of NF-κB and activator protein-1 activation and support its possible therapeutic role for the treatment of endotoxemia. Copyright © 2017 John Wiley & Sons, Ltd.
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