TY  - JOUR
A1  - Rushdi, Mohammed I.
A1  - Abdel-Rahman, Iman A. M.
A1  - Attia, Eman Zekry
A1  - Saber, Hani
A1  - Saber, Abdullah A.
A1  - Bringmann, Gerhard
A1  - Abdelmohsen, Usama Ramadan
T1  - The biodiversity of the genus Dictyota: phytochemical and pharmacological natural products prospectives
JF  - Molecules
N2  - Although a broad variety of classes of bioactive compounds have already been isolated from seaweeds of the genus Dictyota, most different species are still chemically and biologically unexplored. Dictyota species are well-known brown seaweeds belonging to the Dictyotaceae (Phaeophyta). The phytochemical composition within the genus Dictyota has recently received considerable interest, and a vast array of components, including diterpenes, sesquiterepenes, sterols, amino acids, as well as saturated and polyunsaturated fatty acids, have been characterized. The contribution of these valued metabolites to the biological potential, which includes anti-proliferative, anti-microbial, antiviral, antioxidant, anti-inflammatory, and anti-hyperpigmentation activities, of the genus Dictyota has also been explored. Therefore, this is the most comprehensive review, focusing on the published literature relevant to the chemically and pharmacologically diverse biopharmaceuticals isolated from different species of the genus Dictyota during the period from 1976 to now.
KW  - Phaeophyceae
KW  - Dictyotaceae
KW  - marine macroalgae
KW  - brown seaweeds
KW  - natural products
KW  - bioactivities
KW  - Dictyota
Y1  - 2022
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-302428
SN  - 1420-3049
VL  - 27
IS  - 3
ER  - 
TY  - JOUR
A1  - Al-Warhi, Tarfah
A1  - Elmaidomy, Abeer H.
A1  - Maher, Sherif A.
A1  - Abu-Baih, Dalia H.
A1  - Selim, Samy
A1  - Albqmi, Mha
A1  - Al-Sanea, Mohammad M.
A1  - Alnusaire, Taghreed S.
A1  - Ghoneim, Mohammed M.
A1  - Mostafa, Ehab M.
A1  - Hussein, Shaimaa
A1  - El-Damasy, Ashraf K.
A1  - Saber, Entesar Ali
A1  - Elrehany, Mahmoud A.
A1  - Sayed, Ahmed M.
A1  - Othman, Eman M.
A1  - El-Sherbiny, Mohamed
A1  - Abdelmohsen, Usama Ramadan
T1  - The wound-healing potential of Olea europaea L. Cv. Arbequina leaves extract: an integrated in vitro, in silico, and in vivo investigation
JF  - Metabolites
N2  - Olea europaea L. Cv. Arbequina (OEA) (Oleaceae) is an olive variety species that has received little attention. Besides our previous work for the chemical profiling of OEA leaves using LC–HRESIMS, an additional 23 compounds are identified. An excision wound model is used to measure wound healing action. Wounds are provided with OEA (2% w/v) or MEBO\(^®\) cream (marketed treatment). The wound closure rate related to vehicle-treated wounds is significantly increased by OEA. Comparing to vehicle wound tissues, significant levels of TGF-β in OEA and MEBO\(^®\) (p < 0.05) are displayed by gene expression patterns, with the most significant levels in OEA-treated wounds. Proinflammatory TNF-α and IL-1β levels are substantially reduced in OEA-treated wounds. The capability of several lignan-related compounds to interact with MMP-1 is revealed by extensive in silico investigation of the major OEA compounds (i.e., inverse docking, molecular dynamics simulation, and ΔG calculation), and their role in the wound-healing process is also characterized. The potential of OEA as a potent MMP-1 inhibitor is shown in subsequent in vitro testing (IC\(_{50}\) = 88.0 ± 0.1 nM). In conclusion, OEA is introduced as an interesting therapeutic candidate that can effectively manage wound healing because of its anti-inflammatory and antioxidant properties.
KW  - olive
KW  - LC–HRESIMS
KW  - wound
KW  - Olea
KW  - TNF-α
KW  - virtual docking
KW  - TGF-β
KW  - MMP-1
Y1  - 2022
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-286150
SN  - 2218-1989
VL  - 12
IS  - 9
ER  - 
TY  - JOUR
A1  - Eltamany, Enas E.
A1  - Abdelmohsen, Usama Ramadan
A1  - Hal, Dina M.
A1  - Ibrahim, Amany K.
A1  - Hassanean, Hashim A.
A1  - Abdelhameed, Reda F. A.
A1  - Temraz, Tarek A.
A1  - Hajjar, Dina
A1  - Makki, Arwa A.
A1  - Hendawy, Omnia Magdy
A1  - AboulMagd, Asmaa M.
A1  - Youssif, Khayrya A.
A1  - Bringmann, Gerhard
A1  - Ahmed, Safwat A.
T1  - Holospiniferoside: A New Antitumor Cerebroside from The Red Sea Cucumber Holothuria spinifera: In Vitro and In Silico Studies
JF  - Molecules
N2  - Chemical investigation of the methanolic extract of the Red Sea cucumber Holothuria spinifera led to the isolation of a new cerebroside, holospiniferoside (1), together with thymidine (2), methyl-α-d-glucopyranoside (3), a new triacylglycerol (4), and cholesterol (5). Their chemical structures were established by NMR and mass spectrometric analysis, including gas chromatography–mass spectrometry (GC–MS) and high-resolution mass spectrometry (HRMS). All the isolated compounds are reported in this species for the first time. Moreover, compound 1 exhibited promising in vitro antiproliferative effect on the human breast cancer cell line (MCF-7) with IC\(_{50}\) of 20.6 µM compared to the IC50 of 15.3 µM for the drug cisplatin. To predict the possible mechanism underlying the cytotoxicity of compound 1, a docking study was performed to elucidate its binding interactions with the active site of the protein Mdm2–p53. Compound 1 displayed an apoptotic activity via strong interaction with the active site of the target protein. This study highlights the importance of marine natural products in the design of new anticancer agents.
KW  - Holothuria spinifera
KW  - HRMS
KW  - cerebrosides
KW  - molecular docking
KW  - cytotoxicity
Y1  - 2021
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-234058
SN  - 1420-3049
VL  - 26
IS  - 6
ER  - 
TY  - JOUR
A1  - Alnusaire, Taghreed S.
A1  - Sayed, Ahmed M.
A1  - Elmaidomy, Abeer H.
A1  - Al-Sanea, Mohammad M.
A1  - Albogami, Sarah
A1  - Albqmi, Mha
A1  - Alowaiesh, Bassam F.
A1  - Mostafa, Ehab M.
A1  - Musa, Arafa
A1  - Youssif, Khayrya A.
A1  - Refaat, Hesham
A1  - Othman, Eman M.
A1  - Dandekar, Thomas
A1  - Alaaeldin, Eman
A1  - Ghoneim, Mohammed M.
A1  - Abdelmohsen, Usama Ramadan
T1  - An in vitro and in silico study of the enhanced antiproliferative and pro-oxidant potential of Olea europaea L. cv. Arbosana leaf extract via elastic nanovesicles (spanlastics)
JF  - Antioxidants
N2  - The olive tree is a venerable Mediterranean plant and often used in traditional medicine. The main aim of the present study was to evaluate the effect of Olea europaea L. cv. Arbosana leaf extract (OLE) and its encapsulation within a spanlastic dosage form on the improvement of its pro-oxidant and antiproliferative activity against HepG-2, MCF-7, and Caco-2 human cancer cell lines. The LC-HRESIMS-assisted metabolomic profile of OLE putatively annotated 20 major metabolites and showed considerable in vitro antiproliferative activity against HepG-2, MCF-7, and Caco-2 cell lines with IC\(_{50}\) values of 9.2 ± 0.8, 7.1 ± 0.9, and 6.5 ± 0.7 µg/mL, respectively. The encapsulation of OLE within a (spanlastic) nanocarrier system, using a spraying method and Span 40 and Tween 80 (4:1 molar ratio), was successfully carried out (size 41 ± 2.4 nm, zeta potential 13.6 ± 2.5, and EE 61.43 ± 2.03%). OLE showed enhanced thermal stability, and an improved in vitro antiproliferative effect against HepG-2, MCF-7, and Caco-2 (IC\(_{50}\) 3.6 ± 0.2, 2.3 ± 0.1, and 1.8 ± 0.1 µg/mL, respectively) in comparison to the unprocessed extract. Both preparations were found to exhibit pro-oxidant potential inside the cancer cells, through the potential inhibitory activity of OLE against glutathione reductase and superoxide dismutase (IC\(_{50}\) 1.18 ± 0.12 and 2.33 ± 0.19 µg/mL, respectively). These inhibitory activities were proposed via a comprehensive in silico study to be linked to the presence of certain compounds in OLE. Consequently, we assume that formulating such a herbal extract within a suitable nanocarrier would be a promising improvement of its therapeutic potential.
KW  - olive
KW  - metabolomic profiling
KW  - antiproliferative
KW  - pro-oxidant
KW  - encapsulation
KW  - spanlastic
KW  - nanocarrier
KW  - docking
KW  - molecular dynamics simulation
KW  - Olea
Y1  - 2021
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-250064
SN  - 2076-3921
VL  - 10
IS  - 12
ER  - 
TY  - JOUR
A1  - Abdelhameed, Reda F. A.
A1  - Habib, Eman S.
A1  - Goda, Marwa S.
A1  - Fahim, John Refaat
A1  - Hassanean, Hashem A.
A1  - Eltamany, Enas E.
A1  - Ibrahim, Amany K.
A1  - AboulMagd, Asmaa M.
A1  - Fayez, Shaimaa
A1  - Abd El-kader, Adel M.
A1  - Al-Warhi, Tarfah
A1  - Bringmann, Gerhard
A1  - Ahmed, Safwat A.
A1  - Abdelmohsen, Usama Ramadan
T1  - Thalassosterol, a New Cytotoxic Aromatase Inhibitor Ergosterol Derivative from the Red Sea Seagrass Thalassodendron ciliatum
JF  - Marine Drugs
N2  - 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.
KW  - cytotoxic activity
KW  - ergosterol derivative
KW  - metabolic analysis
KW  - docking studies
KW  - seagrass
KW  - Thalassodendron ciliatum
Y1  - 2020
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-236085
VL  - 18
IS  - 7
ER  - 
TY  - JOUR
A1  - Abdelhameed, Reda F. A.
A1  - Habib, Eman S.
A1  - Eltahawy, Nermeen A.
A1  - Hassanean, Hashim A.
A1  - Ibrahim, Amany K.
A1  - Mohammed, Anber F.
A1  - Fayez, Shaimaa
A1  - Hayallah, Alaa M.
A1  - Yamada, Koji
A1  - Behery, Fathy A.
A1  - Al-Sanea, Mohammad M.
A1  - Alzarea, Sami I.
A1  - Bringmann, Gerhard
A1  - Ahmed, Safwat A.
A1  - Abdelmohsen, Usama Ramadan
T1  - New cytotoxic natural products from the Red Sea sponge Stylissa carteri
JF  - Marine Drugs
N2  - Bioactivity-guided isolation supported by LC-HRESIMS metabolic profiling led to the isolation of two new compounds, a ceramide, stylissamide A (1), and a cerebroside, stylissoside A (2), from the methanol extract of the Red Sea sponge Stylissa carteri. Structure elucidation was achieved using spectroscopic techniques, including 1D and 2D NMR and HRMS. The bioactive extract’s metabolomic profiling showed the existence of various secondary metabolites, mainly oleanane-type saponins, phenolic diterpenes, and lupane triterpenes. The in vitro cytotoxic activity of the isolated compounds was tested against two human cancer cell lines, MCF-7 and HepG2. Both compounds, 1 and 2, displayed strong cytotoxicity against the MCF-7 cell line, with IC\(_{50}\) values at 21.1 ± 0.17 µM and 27.5 ± 0.18 µM, respectively. They likewise showed a promising activity against HepG2 with IC\(_{50}\) at 36.8 ± 0.16 µM for 1 and IC\(_{50}\) 30.5 ± 0.23 µM for 2 compared to the standard drug cisplatin. Molecular docking experiments showed that 1 and 2 displayed high affinity to the SET protein and to inhibitor 2 of protein phosphatase 2A (I2PP2A), which could be a possible mechanism for their cytotoxic activity. This paper spreads light on the role of these metabolites in holding fouling organisms away from the outer surface of the sponge, and the potential use of these defensive molecules in the production of novel anticancer agents.
KW  - LC-HRESIMS
KW  - Stylissa carteri
KW  - ceramide
KW  - cerebroside
KW  - docking
KW  - cytotoxic activity
Y1  - 2020
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-205795
SN  - 1660-3397
VL  - 18
IS  - 5
ER  - 
TY  - JOUR
A1  - Zahran, Eman Maher
A1  - Albohy, Amgad
A1  - Khalil, Amira
A1  - Ibrahim, Alyaa Hatem
A1  - Ahmed, Heba Ali
A1  - El-Hossary, Ebaa M.
A1  - Bringmann, Gerhard
A1  - Abdelmohsen, Usama Ramadan
T1  - Bioactivity Potential of Marine Natural Products from Scleractinia-Associated Microbes and In Silico Anti-SARS-COV-2 Evaluation
JF  - Marine Drugs
N2  - Marine organisms and their associated microbes are rich in diverse chemical leads. With the development of marine biotechnology, a considerable number of research activities are focused on marine bacteria and fungi-derived bioactive compounds. Marine bacteria and fungi are ranked on the top of the hierarchy of all organisms, as they are responsible for producing a wide range of bioactive secondary metabolites with possible pharmaceutical applications. Thus, they have the potential to provide future drugs against challenging diseases, such as cancer, a range of viral diseases, malaria, and inflammation. This review aims at describing the literature on secondary metabolites that have been obtained from Scleractinian-associated organisms including bacteria, fungi, and zooxanthellae, with full coverage of the period from 1982 to 2020, as well as illustrating their biological activities and structure activity relationship (SAR). Moreover, all these compounds were filtered based on ADME analysis to determine their physicochemical properties, and 15 compounds were selected. The selected compounds were virtually investigated for potential inhibition for SARS-CoV-2 targets using molecular docking studies. Promising potential results against SARS-CoV-2 RNA dependent RNA polymerase (RdRp) and methyltransferase (nsp16) are presented.
KW  - Scleractinia
KW  - marine bacteria
KW  - marine fungi
KW  - zooxanthellae
KW  - marine natural products
KW  - ADME analysis
KW  - SARS-CoV-2
KW  - molecular docking
KW  - RNA-dependent RNA polymerase
KW  - methyltransferase
Y1  - 2020
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-220041
SN  - 1660-3397
VL  - 18
IS  - 12
ER  - 
TY  - JOUR
A1  - Abdelhameed, Reda F. A.
A1  - Eltamany, Enas E.
A1  - Hal, Dina M.
A1  - Ibrahim, Amany K.
A1  - AboulMagd, Asmaa M.
A1  - Al-Warhi, Tarfah
A1  - Youssif, Khayrya A.
A1  - Abd El-kader, Adel M.
A1  - Hassanean, Hashim A.
A1  - Fayez, Shaimaa
A1  - Bringmann, Gerhard
A1  - Ahmed, Safwat A.
A1  - Abdelmohsen, Usama Ramadan
T1  - New cytotoxic cerebrosides from the Red Sea cucumber Holothuria spinifera supported by in-silico studies
JF  - Marine Drugs
N2  - Bioactivity-guided fractionation of a methanolic extract of the Red Sea cucumber Holothuria spinifera and LC-HRESIMS-assisted dereplication resulted in the isolation of four compounds, three new cerebrosides, spiniferosides A (1), B (2), and C (3), and cholesterol sulfate (4). The chemical structures of the isolated compounds were established on the basis of their 1D NMR and HRMS spectral data. Metabolic profiling of the H. spinifera extract indicated the presence of diverse secondary metabolites, mostly hydroxy fatty acids, diterpenes, triterpenes, and cerebrosides. The isolated compounds were tested for their in vitro cytotoxicities against the breast adenocarcinoma MCF-7 cell line. Compounds 1, 2, 3, and 4 displayed promising cytotoxic activities against MCF-7 cells, with IC\(_{50}\) values of 13.83, 8.13, 8.27, and 35.56 µM, respectively, compared to that of the standard drug doxorubicin (IC\(_{50}\) 8.64 µM). Additionally, docking studies were performed for compounds 1, 2, 3, and 4 to elucidate their binding interactions with the active site of the SET protein, an inhibitor of protein phosphatase 2A (PP2A), which could explain their cytotoxic activity. This study highlights the important role of these metabolites in the defense mechanism of the sea cucumber against fouling organisms and the potential uses of these active molecules in the design of new anticancer agents.
KW  - LC-HRESIMS
KW  - Holothuria spinifera
KW  - cerebrosides
KW  - molecular docking
KW  - cytotoxicity
Y1  - 2020
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-211089
SN  - 1660-3397
VL  - 18
IS  - 8
ER  - 
TY  - JOUR
A1  - El-Hossary, Ebaa M.
A1  - Abdel-Halim, Mohammad
A1  - Ibrahim, Eslam S.
A1  - Pimentel-Elardo, Sheila Marie
A1  - Nodwell, Justin R.
A1  - Handoussa, Heba
A1  - Abdelwahab, Miada F.
A1  - Holzgrabe, Ulrike
A1  - Abdelmohsen, Usama Ramadan
T1  - Natural Products Repertoire of the Red Sea
JF  - Marine Drugs
N2  - Marine natural products have achieved great success as an important source of new lead compounds for drug discovery. The Red Sea provides enormous diversity on the biological scale in all domains of life including micro- and macro-organisms. In this review, which covers the literature to the end of 2019, we summarize the diversity of bioactive secondary metabolites derived from Red Sea micro- and macro-organisms, and discuss their biological potential whenever applicable. Moreover, the diversity of the Red Sea organisms is highlighted as well as their genomic potential. This review is a comprehensive study that compares the natural products recovered from the Red Sea in terms of ecological role and pharmacological activities.
KW  - Red Sea
KW  - marine natural products
KW  - marine organisms
KW  - biodiversity
KW  - marine metagenomics
KW  - bioactivity
Y1  - 2020
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-213110
SN  - 1660-3397
VL  - 18
IS  - 9
ER  - 
TY  - JOUR
A1  - Elmaidomy, Abeer H.
A1  - Mohammed, Rabab
A1  - Hassan, Hossam M.
A1  - Owis, Asmaa I.
A1  - Rateb, Mostafa E.
A1  - Khanfar, Mohammad A.
A1  - Krischke, Markus
A1  - Mueller, Martin J.
A1  - Abdelmohsen, Usama Ramadan
T1  - Metabolomic profiling and cytotoxic tetrahydrofurofuran lignans investigations from Premna odorata Blanco
JF  - Metabolites
N2  - Metabolomic profiling of different Premna odorata Blanco (Lamiaceae) organs, bark, wood, young stems, flowers, and fruits dereplicated 20, 20, 10, 20, and 20 compounds, respectively, using LC–HRESIMS. The identified metabolites (1–34) belonged to different chemical classes, including iridoids, flavones, phenyl ethanoids, and lignans. A phytochemical investigation of P. odorata bark afforded one new tetrahydrofurofuran lignan, 4β-hydroxyasarinin 35, along with fourteen known compounds. The structure of the new compound was confirmed using extensive 1D and 2D NMR, and HRESIMS analyses. A cytotoxic investigation of compounds 35–38 against the HL-60, HT-29, and MCF-7 cancer cell lines, using the MTT assay showed that compound 35 had cytotoxic effects against HL-60 and MCF-7 with IC50 values of 2.7 and 4.2 µg/mL, respectively. A pharmacophore map of compounds 35 showed two hydrogen bond acceptor (HBA) aligning the phenoxy oxygen atoms of benzodioxole moieties, two aromatic ring features vectored on the two phenyl rings, one hydrogen bond donor (HBD) feature aligning the central hydroxyl group and thirteen exclusion spheres which limit the boundaries of sterically inaccessible regions of the target’s active site.
KW  - Premna
KW  - lignan
KW  - metabolomic
KW  - cytotoxic
KW  - pharmacophore map
Y1  - 2019
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-193187
SN  - 2218-1989
VL  - 9
IS  - 10
ER  -