@article{AbdelhameedHabibGodaetal.2020,
  author    = {Abdelhameed, Reda F. A. and Habib, Eman S. and Goda, Marwa S. and Fahim, John Refaat and Hassanean, Hashem A. and Eltamany, Enas E. and Ibrahim, Amany K. and AboulMagd, Asmaa M. and Fayez, Shaimaa and Abd El-kader, Adel M. and Al-Warhi, Tarfah and Bringmann, Gerhard and Ahmed, Safwat A. and Abdelmohsen, Usama Ramadan},
  title     = {Thalassosterol, a New Cytotoxic Aromatase Inhibitor Ergosterol Derivative from the Red Sea Seagrass Thalassodendron ciliatum},
  series = {Marine Drugs},
  volume    = {18},
  journal   = {Marine Drugs},
  number    = {7},
  doi       = {10.3390/md18070354},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-236085},
  year      = {2020},
  abstract  = {Thalassodendron ciliatum (Forssk.) Den Hartog is a seagrass belonging to the plant family Cymodoceaceae with ubiquitous phytoconstituents and important pharmacological potential, including antioxidant, antiviral, and cytotoxic activities. In this work, a new ergosterol derivative named thalassosterol (1) was isolated from the methanolic extract of T. ciliatum growing in the Red Sea, along with two known first-reported sterols, namely ergosterol (2) and stigmasterol (3), using different chromatographic techniques. The structure of the new compound was established based on 1D and 2D NMR spectroscopy and high-resolution mass spectrometry (HR-MS) and by comparison with the literature data. The new ergosterol derivative showed significant in vitro antiproliferative potential against the human cervical cancer cell line (HeLa) and human breast cancer (MCF-7) cell lines, with IC\(_{50}\) values of 8.12 and 14.24 µM, respectively. In addition, docking studies on the new sterol 1 explained the possible binding interactions with an aromatase enzyme; this inhibition is beneficial in both cervical and breast cancer therapy. A metabolic analysis of the crude extract of T. ciliatum using liquid chromatography combined with high-resolution electrospray ionization mass spectrometry (LC-ESI-HR-MS) revealed the presence of an array of phenolic compounds, sterols and ceramides, as well as di- and triglycerides.},
  language  = {en}
}
@article{AbdelhafezFawzyFahimetal.2018,
  author    = {Abdelhafez, Omnia Hesham and Fawzy, Michael Atef and Fahim, John Refaat and Desoukey, Samar Yehia and Krischke, Markus and Mueller, Martin J. and Abdelmohsen, Usama Ramadan},
  title     = {Hepatoprotective potential of Malvaviscus arboreus against carbon tetrachloride-induced liver injury in rats},
  series = {PLoS ONE},
  volume    = {13},
  journal   = {PLoS ONE},
  number    = {8},
  doi       = {10.1371/journal.pone.0202362},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-177243},
  pages     = {e0202362},
  year      = {2018},
  abstract  = {Malvaviscus arboreus Cav. is a medicinal plant belonging to family Malvaceae with both ethnomedical and culinary value; however, its phytochemical and biological profiles have been scarcely studied. Accordingly, this work was designed to explore the chemical composition and the hepatoprotective potential of M. arboreus against carbon tetrachloride (CCl\(_4\))-induced hepatotoxicity. The total extract of the aerial parts and its derived fractions (petroleum ether, dichloromethane, ethyl acetate, and aqueous) were orally administered to rats for six consecutive days, followed by injection of CCl\(_4\) (1:1 v/v, in olive oil, 1.5 ml/kg, i.p.) on the next day. Results showed that the ethyl acetate and dichloromethane fractions significantly alleviated liver injury in rats as indicated by the reduced levels of alanine transaminase (ALT), aspartate transaminase (AST), alkaline phosphatase (ALP), total bilirubin (TB), and malondialdehyde (MDA), along with enhancement of the total antioxidant capacities of their livers, with the maximum effects were recorded by the ethyl acetate fraction. Moreover, the protective actions of both fractions were comparable to those of silymarin (100 mg/kg), and have been also substantiated by histopathological evaluations. On the other hand, liquid chromatography-high resolution electrospray ionization mass spectrometry (LC‒HR‒ESI‒MS) metabolomic profiling of the crude extract of M. arboreus aerial parts showed the presence of a variety of phytochemicals, mostly phenolics, whereas the detailed chemical analysis of the most active fraction (i.e. ethyl acetate) resulted in the isolation and identification of six compounds for the first time in the genus, comprising four phenolic acids; β-resorcylic, caffeic, protocatechuic, and 4-hydroxyphenylacetic acids, in addition to two flavonoids; trifolin and astragalin. Such phenolic principles, together with their probable synergistic antioxidant and liver-protecting properties, seem to contribute to the observed hepatoprotective potential of M. arboreus.},
  language  = {en}
}