| In vitro: |
| Food Chem. 2015 Jan 1;166:609-15. | | Trilobatin attenuates the LPS-mediated inflammatory response by suppressing the NF-κB signaling pathway.[Pubmed: 25053100 ] | We investigated the anti-inflammatory effect of Trilobatin, the flavonoid isolated from the leaves of Lithocarpus polystachyus Rehd, as well as the underlying molecular mechanisms.
METHODS AND RESULTS:
Treatment with Trilobatin (0.005-5 μM) dose-dependently inhibited the lipopolysaccharide (LPS)-induced mRNA expression and secretion of pro-inflammatory cytokines, including tumor necrosis factor α (TNFα), interleukin-1β (IL-1β) and interleukin-6 (IL-6), in RAW 264.7 macrophages. However, no further inhibition was detected when the concentration of Trilobatin was increased to 50 μM. Western blot analysis confirmed that the mechanism of the anti-inflammatory effect was correlated with the inhibition of LPS-induced inhibitor of nuclear factor-kappa B α (IκBα) degradation and nuclear factor-kappa B (NF-κB) p65 phosphorylation. In addition, Trilobatin also showed a significant inhibition of LPS-induced TNFα and IL-6 at both the mRNA and protein levels in a mouse model.
CONCLUSIONS:
Our results suggest that Trilobatin potentially inhibits the LPS-induced inflammatory response by suppressing the NF-κB signaling pathway. | | Z Naturforsch C. 2004 Jul-Aug;59(7-8):481-4. | | Antioxidant activities of three dihydrochalcone glucosides from leaves of Lithocarpus pachyphyllus.[Pubmed: 15813365] | In vitro antioxidant activities of three sweet dihydrochalcone glucosides from the leaves of Lithocarpus pachyphyllus (Kurz) Rehd. (Fagaceae), Trilobatin 2"-acetate (1), phloridzin (2) and Trilobatin (3), were investigated.
METHODS AND RESULTS:
The IC50 (50% inhibitory concentration) values for compounds 1-3 of lipid peroxidation in rat liver homogenate were 261, 28, 88 microM, respectively. Compounds 1-3 increased superoxide dismutase (SOD) activity with EC50 (50% effective concentration) values of 575, 167, 128 microM, and glutathione peroxidase (GSH-Px) activity with EC50 values of 717, 347, 129 microM, respectively, and showed only weak DPPH (1,1-diphenyl-2-picrylhydrazyl) radical scavenging activity. |
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