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  • Title: Revealing anti-inflammation mechanism of water-extract and oil of forsythiae fructus on carrageenan-Induced edema rats by serum metabolomics.
    Author: Yuan A, Gong L, Luo L, Dang J, Gong X, Zhao M, Li Y, Li Y, Peng C.
    Journal: Biomed Pharmacother; 2017 Nov; 95():929-937. PubMed ID: 28915534.
    Abstract:
    Forsythiae Fructus is an important Chinese medicine which shows a significant effect against inflammation. This study aimed to investigate the preventive anti-inflammation mechanism of Forsythiae Fructus by serum metabolomics strategy and compare the difference of the metabolism pathways between Forsythia extract and Forsythia oil in rat. Four groups (control group, model group, Forsythia extract group and Forsythia oil group) were orally administered 10mL/kg 0.5% Tween 80 solution, 10mL/kg 0.5% Tween 80 solution, 5g/kg Forsythia extract and 0.48mL/kg Forsythia oil respectively. 30min after drug administration, rat acute inflammation was induced by subcutaneous injection of carrageenan in the right paw in model group, Forsythia extract group and Forsythia oil group. After being administered Forsythia extract and Forsythia oil, the percentage of rat paw edema was significantly decreased (P<0.05) compared with model group. Metabolomics based on UPLC-Q-TOF-MS/MS was used to analyze the collected serum sample. Multivariate analysis was established for metabolomics analysis. According to Principal component analysis (PCA) and partial least squares-discriminate analysis (PLS-DA) results, four groups were clearly separated. And thirteen alterative biomarkers were identified in the serum, namely PC (19:0/0:0), LysoPC (20:0), LysoPC (20:1), LysoPC (17:0), Sphingosine, Linoleic acid, 3R-hydroxy-butanoic acid (3-HB), 2-hydroxyhexadecanoic acid, Lactic acid, L-Threonine, L-Leucine, Maleic acid, Adipic acid. The change of biomarkers suggested that Forsythia extract affected Linoleic acid metabolism, Valine, leucine and isoleucine biosynthesis, Sphingolipid metabolism and Glycerophospholipid metabolism. Forsythia oil affected Sphingolipid metabolism and Glycerophospholipid metabolism. It indicated that Forsythia extract and Forsythia oil both showed significant preventive anti-inflammatory effect through acting on different metabolism pathways. Moreover, efficacy mechanism of Forsythiae Fructus could recover metabolites disturb in the body through affecting particular drug targets associated with the inflammatory pathway.
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