Browsing by Author "Kassem, H. A"

Filter results by typing the first few letters
Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    GC-MS Analysis of the Essential Oil of Leaves and Rhizomes of Alpinia zerumbet (Pers.) B.L. and In Vitro Hepatoprotection and Cytotoxicity Study
    (RJPBCS RESEARCH JOURNAL PHARMACEUTICAL, 2016-02) El-Shamy, S. S; Hassanein, H. D.; Motaal, A. A. Abdel; Kassem, H. A; Tawfik, W. A; El-Hawary, S. S; Hammouda, F. M
    The investigated essential oils of rhizomes and leaves of Alpinia zerumbet (Pers.) B.L. Burtt & R. M. Smith, were evaluated using GC-MS analysis. The yield of the essential oil of the leaves was 0.45% V/W, while that of the rhizomes was 0.25% V/W. The major compounds found in the leaves oil were: 1,8-cineole (24.21%) and terpinen-4-ol (19.67%), while the major compounds found in the rhizomes oil were terpinen-4-ol (17.15%) and turmerone (15.62%). GLC investigation of the unsaponifiable fraction indicates the presence npentacosane (26.35%), n-octane (8.89%) and beta-sitosterol (4.01%). GLC investigation of the fatty acids methyl esters indicate the presence of saturated fatty acids: tetradecanoic acid (10.13%) and unsaturated fatty acids: oleic acid (9.87%). The hexane fraction showed no hepatotoxicity till concentration 1000 mu g/ml. The hexane exerted 90% hepatoprotection at a concentration 25 mu g/ml. The aqueous extract achieved 50% cytotoxicity at 50 mu g/ml on the U937 cells (human leukemic monocyte lymphoma); the methanol extract did not show any cytotoxic activity till the concentration of 100 mu g/ml. The aqueous and methanolic extracts had no cytotoxic effect on PBM cells (peripheral blood mononuclear cell), till a concentration of 100 mu g/ml.
  • Thumbnail Image
    Item
    Hepatoprotective and Antioxidant Activities of Phenolic Compounds Isolated from Alpinia zerumbet (Pers.) B.L. grown in Egypt
    (RJPBCS RESEARCH JOURNAL PHARMACEUTICAL, BIOLOGICAL & CHEMICAL SCIENCES, RJPBCS RESEARCH JOURNAL PHARMACEUTICAL, 2015-04) El-Shamy, S. S; Nazif, N. M; Motaal, A. A. Abdel; Tawfik, W. A; Kassem, H. A; El-Hawary, Ss; Hammouda, F. M
    Three phenolic compounds: [chavicol-beta-rutinoside], [1,2, di-O-beta-D-glucopyranosyl-4-allylbenzene] and [(4E)-1,5-Bis(4-hydroxyphenyl)-2-(hydroxymethyl)-4-penten-1-ol], were isolated from Alpinia zerumbet 80% methanolic extract. The compounds were identified by physical and spectroscopic data, PC, TLC, EI/Ms and H-1-NMR and comparing the obtained data with that published ones. The total methanolic extracts and the isolated compounds were subjected for hepatoprotection investigation using In-vitro rat hepatocytes monolayer culture. The alcoholic extract exerted the highest hepatoprotective activity followed by the ethyl acetate and the chloroform fractions. The ethyl acetate fraction, and the isolated compounds showed high antioxidant activity. Compound (3) [(4E)-1,5-Bis(4-hydroxyphenyl)-2-(hydroxymethyl)-4-penten-1-ol] showed the highest antioxidant potential.