Browsing by Author "Abdelmohsen, U.R"

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    Cytotoxic Potential of Green Synthesized Silver Nanoparticles of Lampranthus coccineus Extracts, Metabolic Profiling and Molecular Docking Study
    (Wiley-Blackwell, 10/22/2020) Youssif, K.A; Elshamy, A.M; Rabeh, M.A; Gabr, N; Afifi, W.M; Salem, M.A; Albohy, A; Abdelmohsen, U.R; Haggag, E.G
    The green synthesis of silver nanoparticles (SNPs) using plant extracts has gained great attention due to its unique properties. So, in this study, the aqueous and n-hexane extracts of Lampranthus coccineus F. Aizoaceae were used for the synthesis of silver nanoparticles. The early signs of SNPs synthesis were detected by a color change from yellow to reddish-brown color. The formation of SNPs was further confirmed using a transmission electron microscope (TEM), UV-Visible spectroscopy, and zeta potential. The TEM analysis of SNPs showed spherical nanoparticles with mean size ranges between 8.55 nm to 16.44 nm for Lampranthus coccineus aqueous and hexane extracts. The UV-Visible spectrophotometric analysis showed an absorption peak at λmax of 417 nm, which confirms the formation of SNPs. Zeta potential results indicated that the particles are negatively charged and fairly stable due to the electrostatic repulsion. The cytotoxic activity of the green synthesized SNPs as well as the four isolated compounds (β-Sitosterol-3-O-β-D-glucoside, P-methoxy benzoic acid, dibutyl phthalate, and dioctyl phthalate) was evaluated using MTT assay against MCF-7, HepG-2, and HCT-116 cell lines. Metabolic profiling of the annotated twelve compounds from the crude extract of L. coccineus. These compounds, along with the four isolated compounds were subjected to molecular docking study. © 2020 Wiley-VCH GmbH
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    The metabolomic analysis of fiveMenthaspecies: cytotoxicity, anti-Helicobacterassessment, and the development of polymeric micelles for enhancing the anti-Helicobacteractivity
    (Royal Society of Chemistry, 02/12/2021) Bakr, R.O; Tawfike, A; El-Gizawy, H.A; Tawfik, N; Abdelmohsen, U.R; Abdelwahab, M.F; Alshareef, W.A; Fayez, S.M; El-Mancy, S.M.S; El-Fishawy, A.M; Abdelkawy, M.A; Fayed, M.A.A
    Menthaspecies are medicinally used worldwide and remain attractive for research due to the diversity of their phytoconstituents and large therapeutic indices for various ailments. This study used the metabolomics examination of fiveMenthaspecies (M. suaveolens,M. sylvestris,M. piperita,M. longifolia, andM. viridis) to justify their cytotoxicity and their anti-Helicobactereffects. The activities of species were correlated with their phytochemical profiles by orthogonal partial least square discriminant analysis (OPLS-DA). Tentatively characterized phytoconstituents using liquid chromatography high-resolution electrospray ionization mass spectrometry (LC-HR-ESI-MS) included 49 compounds: 14 flavonoids, 10 caffeic acid esters, 7 phenolic acids, and other constituents.M. piperitashowed the highest cytotoxicity to HepG2 (human hepatoma), MCF-7 (human breast adenocarcinoma), and CACO2 (human colon adenocarcinoma) cells using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assays. OPLS-DA and dereplication studies predicted that the cytotoxic activity was related to benzyl glucopyranoside-sulfate, a lignin glycoside. Furthermore,M. viridiswas effective in suppressing the growth ofHelicobacter pyloriat a concentration of 50 mg mL−1. OPLS-DA predicted that this activity was related to a dihydroxytrimethoxyflavone.M. viridisextract was formulated with Pluronic® F127 to develop polymeric micelles as a nanocarrier that enhanced the anti-Helicobacteractivity of the extract and provided minimum inhibitory concentrations and minimum bactericidal concentrations of 6.5 and 50 mg mL−1, respectively. This activity was also correlated to tentatively identified constituents, including rosmarinic acid, catechins, carvone, and piperitone oxide. © The Royal Society of Chemistry 2021