This product is isolated and purified from the leaves of Engelhardtia roxburghiana Wall.
(2R,3R)-5,7-Dihydroxy-2-(4-hydroxyphenyl)-4-oxo-3,4-dihydro-2H-chromen-3-yl α-L-mannopyranoside/4H-1-Benzopyran-4-one, 2,3-dihydro-5,7-dihydroxy-2-(4-hydroxyphenyl)-3-(α-L-mannopyranosyloxy)-, (2R,3R)-/Dihydrojuncusol/2,7-Phenanthrenediol,5-ethyl-9,10-dihydro-1,6-dimethyl
J Fluoresc. 2012 Jan;22(1):511-9. Binding of engeletin with bovine serum albumin: insights from spectroscopic investigations.[Pubmed: 21947612]In this paper, several spectroscopic techniques were used to investigate the interaction of Engeletin (ELN) with bovine serum albumin (BSA). METHODS AND RESULTS: The analysis of UV-Vis absorption and fluorescence spectra revealed that ELN and BSA formed a static complex ELN-BSA, and ELN quenched the fluorescence of BSA effectively. According to the thermodynamic parameters ΔS(0) = 47.27 J·mol(-1)·K(-1) and ΔΗ(0) = -10.34 kJ·mol(-1), the hydrophobic and hydrogen bond interactions were suggested to be the major interaction forces between ELN and BSA. CONCLUSIONS: Raman spectroscopy indicated that the binding of ELN slightly changed the conformations and microenviroment of BSA and decreased the α-helix content of BSA.
Methanol; Acetontrile; DMSO
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provides coniferyl ferulate(CAS#:572-31-6) MSDS, density, melting point, boiling point, structure, formula, molecular weight etc. Articles of coniferyl ferulate are included as well.>> amp version: coniferyl ferulate
Liver injury is a serious clinical syndrome that characterized by inflammatory response. Engeletin is known to have anti-inflammatory activity. However, the effects of engeletin on liver injury remain unclear. We aimed to assess the protective effect of engeletin on Lipopolysaccharide (LPS)/d-galactosamine (D-gal)-induced liver injury in mice. Engeletin was administered intraperitoneally 1 h before and 12 h after LPS/D-gal treatment. The results showed that engeletin treatment on LPS/D-gal-induced liver injury in mice have a significant protective effect, as confirmed by the attenuation of liver histopathologic changes, MPO activity, and serum AST and ALT levels. At the meanwhile, it also showed that engeletin inhibited the levels of IL-β and TNF-α in serum and liver tissues. Besides, engeletin blocked the activation of NF-κB induced by LPS/D-gal and induced the expression of PPAR-γ in a dose-dependently manner. These findings suggested that engeletin may have a protective effect against liver injury.
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LPS; Liver injury; PPAR-γ; TNF-α
Engeletin inhibits Lipopolysaccharide/d-galactosamine-induced liver injury in mice through activating PPAR-γ.
Tian Q1, Wang G1, Zhang Y1, Zhang F1, Yang L1, Liu Z1, Shen Z2.
Acute lung injury (ALI) is a serious disease with morbidity and mortality in patients. Engeletin(dihydrokaempferol 3-rhamnoside) is a flavanonol glycoside. It can be found in the skin of white grapes and white wine and is widely distributed in southeast Asia. In our study, we evaluated the protective and therapeutic effects of engeletin on lipopolysaccharide (LPS)-induced ALI in animal model. We determined the level of peroxisome proliferator-activated receptor-γ (PPAR-γ), nuclear factor kappaB (NF-κB), and IκBα by western blotting. The myeloperoxidase (MPO) activity and lung wet/dry (W/D) ratio in lung tissues were also detected. Histopathological changes and the pro-inflammatory cytokines TNF-α, IL-6, and IL-1β were determined by H&E staining and ELISA. The MPO activity and lung W/D ratio induced by LPS were attenuated by engeletin. The numbers of inflammatory cells and the levels of inflammatory cytokines in bronchoalveolar lavage fluid (BALF) were ameliorated by engeletin. Furthermore, the results also showed that engeletin significantly suppressed LPS-induced NF-κB activation. The expression of PPAR-γ was upregulated by treatment of engeletin. In conclusion, we found that engeletin had protective and therapeutic effects against LPS-induced ALI by activating PPAR-γ. Engeletin is a potentially effective agent for the treatment of lung injury.
LPS; NF-κB; PPAR-γ; engeletin; lung injury
Protective and Therapeutic Effects of Engeletin on LPS-Induced Acute Lung Injury.
Jiang X1, Chen L2, Zhang Z3, Sun Y3, Wang X1, Wei J4.
Engeletin (dihydrokaempferol 3-rhamnoside) is a flavanonol glycoside. It can be found in the skin of white grapes and white wine and is widely distributed in southeast Asia, and the leaves are used in a tea. Here, we explored the impact of engeletin against the inflammatory reaction in a lipopolysaccharide (LPS)-induced endometritis mouse model. Engeletin treatment significantly attenuated uterus damage and decreased myeloperoxidase activity. ELISA and qPCR assays showed that engeletin dose-dependently suppressed the expression of TNF-α, IL-1β, and IL-6. Molecular studies also demonstrated that the levels of iNOS, COX-2, and TLR4, along with their downstream molecules MyD88, IRAK1, TRAF6, and TAK1, were also suppressed by engeletin. In addition, engeletin treatment inhibited NF-κB signaling-pathway activation. Moreover, immunofluorescence analysis demonstrated that engeletin suppressed NF-κB-p65 nuclear translocation. These data indicated the protective action of engeletinagainst LPS-stimulated endometritis in mice via negative regulation of pro-inflammatory mediators via the TLR4-regulated NF-κB pathway.
anti-inflammatory; dihydrokaempferol 3-rhamnoside; endometritis; engeletin; flavanonol glycoside
Engeletin Alleviates Lipopolysaccharide-Induced Endometritis in Mice by Inhibiting TLR4-mediated NF-κB Activation.
Wu H1, Zhao G1, Jiang K1, Li C1, Qiu C1, Deng G1.
2016 Aug 10