Effects of Hepatoprotective Compounds from the Leaves of Lumnitzera racemosa on Acetaminophen-Induced Liver Damage in Vitro

  • Darwish Ahmed Gomaa Gomaa
    Department of Pharmacognosy, Graduate School of Biomedical and Health Sciences, Hiroshima University Department of Biochemistry, Faculty of Agriculture, Minia University
  • Samy Mamdouh Nabil
    Department of Pharmacognosy, Graduate School of Biomedical and Health Sciences, Hiroshima University Department of Pharmacognosy, Faculty of Pharmacy, Minia University
  • Sugimoto Sachiko
    Department of Pharmacognosy, Graduate School of Biomedical and Health Sciences, Hiroshima University
  • Otsuka Hideaki
    Department of Pharmacognosy, Graduate School of Biomedical and Health Sciences, Hiroshima University Department of Natural Products Chemistry, Faculty of Pharmacy, Yasuda Women’s University
  • Abdel-Salam Hosni
    Department of Biochemistry, Faculty of Agriculture, Minia University
  • Matsunami Katsuyoshi
    Department of Pharmacognosy, Graduate School of Biomedical and Health Sciences, Hiroshima University

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タイトル別名
  • Effects of Hepatoprotective Compounds from the Leaves of <i>Lumnitzera racemosa</i> on Acetaminophen-Induced Liver Damage <i>in Vitro</i>

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Phytochemical investigation of the n-BuOH fraction of the mangrove plant Lumnitzera racemosa WILLD. (Combretaceae) led to the isolation of one new flavonoid glycoside; myrcetin 3-O-methyl glucuronate (1), one new phenolic glycoside; lumniracemoside (2) and one new aliphatic alcohol glycoside; n-hexanol 1-O-rutinoside (3), in addition to seven known compounds (4–10). The structures of these compounds were determined by spectroscopic analyses (UV, IR, high resolution-electrospray ionization (HR-ESI)-MS, one- and two-dimensional (1D- and 2D)-NMR). Compound 7 showed the highest hepatoprotective activity against acetaminophen-induced hepatotoxicity using human HepG2 cells at protection % value of 34.2±3.1%, while compounds 1, 2, 3, 6, and 9 showed weak to moderate hepatoprotective activity (11.6–18.9%). Almost all of these compounds showed stronger 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity compared with the standard Trolox. These results suggest the usefulness of this plant extract and the isolated compounds as promising hepatoprotective agents.

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