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• W1981664425 abstract "Lipopolysaccharide (LPS) is a known trigger in the pathogenesis of sepsis, lipid A being the toxic component. One of several adjuvant therapeutic approaches for severe sepsis is currently focusing on the neutralization of LPS. In order to obtain the components from traditional Chinese herbs that can neutralize the endotoxin, aqueous extractions of twelve herbs were tested using affinity biosensor technology. From twelve herbs, Scutellaria baicalensis Georgi (Huang Qin) found to possess high lipid A-binding abilities, and was selected in subsequent experiments. After subjected to macroporous adsorptive resins and HPLC, we obtained 2',5,6',7-tetrahydroxyflavanonol (THF) from S. baicalensis Georgi under the direction of neutralization of LPS and reducing proinflammatory cytokines. In vitro, THF directly bound to LPS and neutralized its activity. THF not only down-regulated TNF-alpha mRNA expression but also decreased TNF-alpha and IL-6 release from RAW264.7 cells induced by LPS in a dose-dependent manner. THF-mediated inhibition on proinflammatory cytokine release is probably associated with downregulation of LPS-induced TLR4 mRNA augmentation. In vivo, THF could significantly protect mice against a lethal challenge with heat-killed E. coli 35218 (E. coli 35218) in a dose-dependent manner, and decreased the plasma LPS level in endotoxemia mice. These findings provide compelling evidence that THF may be an important potential drug for sepsis treatment. Considering the inhibitory effects of THF on LPS-induced cytokine release are unlikely due to its nonspecific cellular toxicity, THF should be considered as a safe putative candidate for development as a drug for sepsis treatment." @default.
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• W1981664425 date "2008-12-01" @default.
• W1981664425 modified "2023-10-17" @default.
• W1981664425 title "An anti-sepsis monomer, 2′,5,6′,7-tetrahydroxyflavanonol (THF), identified from Scutellaria baicalensis Georgi neutralizes lipopolysaccharide in vitro and in vivo" @default.
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• W1981664425 doi "https://doi.org/10.1016/j.intimp.2008.07.017" @default.
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