Browsing by Author "Ezzat Khalil, Hany"

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    Local anaesthetic potential, metabolic profiling, molecular docking and in silico ADME studies of Ocimum forskolei, family Lamiaceae
    (Taylor and Francis, 2019) Maher Zahran, Eman; Ramadan Abdelmohsen, Usama; M Shalash, Mahmoud; Ezzat Khalil, Hany; . Alaraby Salem, M
    The present study aimed to detect the bioactive metabolites from Ocimum forskolei aerial parts which are responsible for the local anaesthetic activity of the ethyl acetate fraction. Following a bioassay-guided fractionation, twelve compounds were dereplicated from the ethyl acetate fraction which was the most potent one with a mean onset of action (1.43 ± 0.07****) min compared to tetracaine as a positive control (1.37 ± 0.07****) min. These compounds, along with seven other compounds (isolated by diverse chromatographic techniques) were subjected to a molecular docking study to declare the top scoring compounds predicted to be responsible for such activity. The results highlighted Rabdosiin and Apigenin-7-O-rutinoside as the main bioactive leaders of the local anaesthesia via forming multiple H- bonding with the sodium ion channels leading to their blockade and loss of pain sensation, which strongly supports the use of O. forskolei as a local anaesthetic agent
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    Metabolic profiling, histopathological anti-ulcer study, molecular docking and molecular dynamics of ursolic acid isolated from Ocimum forskolei Benth. (family Lamiaceae)
    (Elsevier, 2020-07) Maher Zahran, Eman; Ramadan Abdel mohsen, Usama; Taha Ayoub, Ahmed; Alaraby Salem, M.; Ezzat Khalil, Hany; Yehia Desoukey, Samar; Ahmed Fouad, Mostafa; Salah Kamel, Mohamed
    Ocimum forskolei (Habak), Lamiaceae, is an endemic species from Yemen and KSA; where our present study was aimed at investigating the Metabolic profiling coupled with LCHR-MS analysis of the dichloromethane fraction from the aerial parts of that plant with a special emphasis on ursolic acid as the major predominating compound from this fraction. Histopathological evaluation of ursolic acid in different doses against indomethacin-induced ulcers in rats revealed a highly significant and dose dependent protection. With the dose level of 50 mg/kg b.w., Ursolic acid gave an ulcer index of 1.33 ± 0.33 and 97.8% inhibition, compared to cimetidine as a standard with 3.0 ± 0.58 and 95.2%. To rationalize this activity, docking on various macromolecular targets was performed, followed by molecular dynamics on the most promising target; the M3 receptor. A high binding energy of -344 kJ/mol is predicted between Ursolic acid and the protein indicating the stability of the predicted pose.