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  1. Article ; Online: Anticancer activity, phytochemical investigation and molecular docking insights of Citrullus colocynthis (L.) fruits.

    Mandour, Yasmine M / Refaat, Esraa / Hassanein, Heba D

    Scientific reports

    2023  Volume 13, Issue 1, Page(s) 20038

    Abstract: Cancer disease is regarded as one of the most significant public health issues, regardless of economic standards. Medicinal plants are now regarded as a natural source of anticancer medicines due to their antioxidant and anti-mutagenic actions. ... ...

    Abstract Cancer disease is regarded as one of the most significant public health issues, regardless of economic standards. Medicinal plants are now regarded as a natural source of anticancer medicines due to their antioxidant and anti-mutagenic actions. Cucurbitaceae is considered to be one of the most economically significant families. One family species is Citrullus colocynthis (L.), which has a high concentration of many active secondary chemical metabolites. Various C. colocynthis plant extracts showed cytotoxicity against some cancer cells. This study aims to identify the C. colocynthis fruit components and determine whether they have anticancer action against MIA PaCa-2 and A431 cells. High-Performance Liquid Chromatography/Quadrupole Time of Flight/Mass Spectrometry (HPLC/QTOF/MS); the technique was accustomed to investigate the compounds of the ethyl acetate (EtOAc) fruit extract. Anticancer activity was investigated on both MIAPaCa-2 and A-431 cell lines. DPPH assay for antioxidant activity was carried out. Molecular modelling was employed to help understand the molecular basis for the observed anticancer activity. 24 compounds were tentatively identified by comparing the extract's fragmentation pattern in positive mode against reference compounds spectra and literature. The EtOAc extract of C. colocynthis had effective positive results on cancer cells (MIAPaCa-2 and A-431) and was characterized by slight or no harmful effect on normal (healthy) cells. For the DPPH assay, EtOAc and BuOH extracts exhibited high antioxidant activity (86 and 76%, respectively) compared with the oxidative potential of the standard compound (Caffeic acid, 98%). One of the major cucurbitacin derivatives that LC/MS tentatively identified in the EtOAc extract was Cucurbita-5(10),6,23-triene-3β,25-diol. During this study, docking experiments and MD simulations were carried out, which suggested the anti-pancreatic cancer activity of C. colocynthis extract to be attributed to EGFR inhibition by Cucurbita-5(10),6,23-triene-3β,25-diol. Therefore, expansion of this type of research should be encouraged in the hope of obtaining natural therapeutics for cancerous tumors in the future, having the advantage of being cheaper, safer, and with fewer side effects.
    MeSH term(s) Humans ; Citrullus colocynthis/chemistry ; Antioxidants/chemistry ; Fruit/chemistry ; Molecular Docking Simulation ; Plant Extracts/chemistry ; Phytochemicals/pharmacology ; Phytochemicals/analysis
    Chemical Substances Antioxidants ; Plant Extracts ; Phytochemicals
    Language English
    Publishing date 2023-11-16
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-023-46867-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Strychnine and its mono- and dimeric analogues: a pharmaco-chemical perspective.

    Zlotos, Darius P / Mandour, Yasmine M / Jensen, Anders A

    Natural product reports

    2022  Volume 39, Issue 10, Page(s) 1910–1937

    Abstract: Covering: up to November 2021Since its isolation in 1818, strychnine has attracted the attention of a plethora of chemists and pharmacologists who have established its structure, developed total syntheses, and examined its complex pharmacology. While ... ...

    Abstract Covering: up to November 2021Since its isolation in 1818, strychnine has attracted the attention of a plethora of chemists and pharmacologists who have established its structure, developed total syntheses, and examined its complex pharmacology. While numerous reviews on structure elucidation and total synthesis of strychnine are available, reports on structure-activity relationships (SARs) of this fascinating alkaloid are rare. In this review, we present and discuss structures, synthetic approaches, metabolic transformations, and the diverse pharmacological actions of strychnine and its mono- and dimeric analogues. Particular attention is given to its SARs at glycine receptors (GlyRs) in light of recently published high-resolution structures of strychnine-GlyR complexes. Other pharmacological actions of strychnine and its derivatives, such as their antagonistic properties at nicotinic acetylcholine receptors (nAChRs), allosteric modulation of muscarinic acetylcholine receptors as well as anti-cancer and anti-plasmodial effects are also critically reviewed, and possible future developments in the field are discussed.
    MeSH term(s) Strychnine/pharmacology ; Strychnine/metabolism ; Receptors, Glycine/metabolism ; Structure-Activity Relationship ; Receptors, Nicotinic/metabolism ; Receptors, Muscarinic/metabolism
    Chemical Substances Strychnine (H9Y79VD43J) ; Receptors, Glycine ; Receptors, Nicotinic ; Receptors, Muscarinic
    Language English
    Publishing date 2022-10-19
    Publishing country England
    Document type Journal Article ; Review ; Research Support, Non-U.S. Gov't
    ZDB-ID 2002546-4
    ISSN 1460-4752 ; 0265-0568
    ISSN (online) 1460-4752
    ISSN 0265-0568
    DOI 10.1039/d1np00079a
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: A multi-stage virtual screening of FDA-approved drugs reveals potential inhibitors of SARS-CoV-2 main protease.

    Mandour, Yasmine M / Zlotos, Darius P / Alaraby Salem, M

    Journal of biomolecular structure & dynamics

    2020  Volume 40, Issue 5, Page(s) 2327–2338

    Abstract: Coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is an ongoing global health emergency. Repurposing of approved pharmaceutical drugs for COVID-19 treatment represents an attractive approach to ... ...

    Abstract Coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is an ongoing global health emergency. Repurposing of approved pharmaceutical drugs for COVID-19 treatment represents an attractive approach to quickly identify promising drug candidates. SARS-CoV-2 main protease (M
    MeSH term(s) Antiviral Agents/chemistry ; Antiviral Agents/pharmacology ; COVID-19/drug therapy ; Coronavirus 3C Proteases ; Humans ; Molecular Docking Simulation ; Molecular Dynamics Simulation ; Pharmaceutical Preparations ; Protease Inhibitors/chemistry ; Protease Inhibitors/pharmacology ; SARS-CoV-2
    Chemical Substances Antiviral Agents ; Pharmaceutical Preparations ; Protease Inhibitors ; 3C-like proteinase, SARS-CoV-2 (EC 3.4.22.-) ; Coronavirus 3C Proteases (EC 3.4.22.28)
    Keywords covid19
    Language English
    Publishing date 2020-10-23
    Publishing country England
    Document type Journal Article
    ZDB-ID 49157-3
    ISSN 1538-0254 ; 0739-1102
    ISSN (online) 1538-0254
    ISSN 0739-1102
    DOI 10.1080/07391102.2020.1837680
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Virtual Screening and Biological Evaluation of Potential PD-1/PD-L1 Immune Checkpoint Inhibitors as Anti-Hepatocellular Carcinoma Agents.

    Kamal, Monica A / Badary, Hedy A / Omran, Dalia / Shousha, Hend I / Abdelaziz, Ashraf O / El Tayebi, Hend M / Mandour, Yasmine M

    ACS omega

    2023  Volume 8, Issue 37, Page(s) 33242–33254

    Abstract: Blockade of the programmed cell death-1/programmed cell death ligand-1 (PD-1/PD-L1) immune checkpoint pathway is an efficient immunotherapeutic modality that provided significant advances in cancer treatment especially in solid tumors highly resistant to ...

    Abstract Blockade of the programmed cell death-1/programmed cell death ligand-1 (PD-1/PD-L1) immune checkpoint pathway is an efficient immunotherapeutic modality that provided significant advances in cancer treatment especially in solid tumors highly resistant to traditional therapy. Monoclonal antibodies (mAbs) and small-molecule inhibitors are the two main strategies used to block this axis with mAbs suffering from many limitations. Accordingly, the current alternative is the development of small-molecule PD-1/PD-L1 inhibitors. Here, we present a sequential virtual screening (VS) protocol involving pharmacophore screening followed by molecular docking for the discovery of novel PD-L1 inhibitors. The VS protocol resulted in the discovery of eight novel compounds. A 100 ns MD simulation showed two compounds,
    Language English
    Publishing date 2023-09-03
    Publishing country United States
    Document type Journal Article
    ISSN 2470-1343
    ISSN (online) 2470-1343
    DOI 10.1021/acsomega.3c00279
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Leonotis ocymifolia

    Mufti, Afoua / Feriani, Anouar / Ouchari, Wafae / Mandour, Yasmine M / Tlili, Nizar / Ibrahim, Mohammed Auwal / Mahmoud, Mona F / Sobeh, Mansour

    Frontiers in pharmacology

    2023  Volume 14, Page(s) 1221486

    Abstract: Herein, we explored the protective effect ... ...

    Abstract Herein, we explored the protective effect of
    Language English
    Publishing date 2023-08-01
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2587355-6
    ISSN 1663-9812
    ISSN 1663-9812
    DOI 10.3389/fphar.2023.1221486
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Development and evaluation of 2,4-disubstituted-5-aryl pyrimidine derivatives as antibacterial agents.

    Khalifa, Hend / Rasheed, Sari / Haupenthal, Jörg / Herrmann, Jennifer / Mandour, Yasmine M / Abadi, Ashraf H / Engel, Matthias / Müller, Rolf / Hirsch, Anna K H / Abdel-Halim, Mohammad / Hamed, Mostafa M

    Archiv der Pharmazie

    2024  Volume 357, Issue 4, Page(s) e2300656

    Abstract: Designing novel candidates as potential antibacterial scaffolds has become crucial due to the lack of new antibiotics entering the market and the persistent rise in multidrug resistance. Here, we describe a new class of potent antibacterial agents based ... ...

    Abstract Designing novel candidates as potential antibacterial scaffolds has become crucial due to the lack of new antibiotics entering the market and the persistent rise in multidrug resistance. Here, we describe a new class of potent antibacterial agents based on a 5-aryl-N
    MeSH term(s) Anti-Bacterial Agents/pharmacology ; Anti-Bacterial Agents/chemistry ; Staphylococcus aureus ; Methicillin-Resistant Staphylococcus aureus ; Structure-Activity Relationship ; Bacteria ; Pyrimidines/pharmacology ; Microbial Sensitivity Tests
    Chemical Substances Anti-Bacterial Agents ; Pyrimidines
    Language English
    Publishing date 2024-02-02
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 6381-2
    ISSN 1521-4184 ; 0365-6233 ; 1437-1014
    ISSN (online) 1521-4184
    ISSN 0365-6233 ; 1437-1014
    DOI 10.1002/ardp.202300656
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Niazimicin: A thiocarbamate glycoside from Moringa oleifera Lam. seeds with a novel neuroprotective activity

    Abdelsayed, Eman M. / Medhat, Dalia / Mandour, Yasmine M. / Hanafi, Rasha S. / Motaal, Amira Abdel

    Journal of food biochemistry. 2021 Dec., v. 45, no. 12

    2021  

    Abstract: Moringa oleifera (MO) known as the miracle tree is a famous nutritional source in many countries. In this study, the neuroprotective activity of MO seeds was investigated. Fractions of the 70% ethanol seed extract of MO were injected at a dose of 250 mg ... ...

    Abstract Moringa oleifera (MO) known as the miracle tree is a famous nutritional source in many countries. In this study, the neuroprotective activity of MO seeds was investigated. Fractions of the 70% ethanol seed extract of MO were injected at a dose of 250 mg kg⁻¹ day⁻¹ to albino rats for 15 days, after‐which induction of dementia was done using 100 mg/kg AlCl₃ over 30 days. Results revealed that all fractions ameliorated the effects of AlCl₃ where methylene chloride and ethyl acetate fractions, containing the major bioactive compound niazimicin (NZ), showed the best activities. Biological investigations proved NZ to be a highly potent neuroprotective drug lead as a first report, by causing a decrease in the levels of malondialdehyde, cholinesterase, nitric oxide (NO) and amyloid β by 47%, 34%, 53% and 59%, respectively, and increasing glutathione levels by 54%. Molecular docking studies suggested NZ neuroprotective effects to be mediated by inhibition of caspase‐3 and inducible nitric oxide synthase enzymes. PRACTICAL APPLICATIONS: The current findings present the neuroprotective effect of Moringa oleifera seeds consumed as a food supplement and in daily diet. In addition, niazimicin is a promising lead for the development of novel agents against Alzheimer’s disease as seen by the reported results.
    Keywords Moringa oleifera ; albino ; amyloid ; bioactive compounds ; caspase-3 ; cholinesterase ; dietary nutrient sources ; dietary supplements ; ethanol ; ethyl acetate ; glutathione ; glycosides ; inducible nitric oxide synthase ; malondialdehyde ; methylene chloride ; neuroprotective effect ; nitric oxide ; seed extracts ; trees
    Language English
    Dates of publication 2021-12
    Publishing place John Wiley & Sons, Ltd
    Document type Article
    Note JOURNAL ARTICLE
    ZDB-ID 433846-7
    ISSN 1745-4514 ; 0145-8884
    ISSN (online) 1745-4514
    ISSN 0145-8884
    DOI 10.1111/jfbc.13992
    Database NAL-Catalogue (AGRICOLA)

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  8. Article ; Online: Discovery of Novel CCR5 Ligands as Anticolorectal Cancer Agents by Sequential Virtual Screening.

    El-Zohairy, Mariam A / Zlotos, Darius P / Berger, Martin R / Adwan, Hassan H / Mandour, Yasmine M

    ACS omega

    2021  Volume 6, Issue 16, Page(s) 10921–10935

    Abstract: C-C chemokine receptor type 5 (CCR5) is a member of the G protein-coupled receptor. CCR5 and its interaction with chemokine ligands have been crucial for understanding and tackling human immunodeficiency virus (HIV)-1 entry into target cells. In recent ... ...

    Abstract C-C chemokine receptor type 5 (CCR5) is a member of the G protein-coupled receptor. CCR5 and its interaction with chemokine ligands have been crucial for understanding and tackling human immunodeficiency virus (HIV)-1 entry into target cells. In recent years, the change in CCR5 expression has been related to the progression of different cancer types. Patients treated with the CCR5 ligand, maraviroc (MVC), showed a deceleration in tumor development especially for metastatic colorectal cancer. Based on the crystal structure of CCR5, we herein describe a multistage virtual screening protocol including pharmacophore screening, molecular docking, and protein-ligand interaction fingerprint (PLIF) postdocking filtration for discovery of novel CCR5 ligands. The applied virtual screening protocol led to the identification of four hits with binding modes showing access to the major and minor pockets of the MVC binding site. Compounds
    Language English
    Publishing date 2021-04-16
    Publishing country United States
    Document type Journal Article
    ISSN 2470-1343
    ISSN (online) 2470-1343
    DOI 10.1021/acsomega.1c00681
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Niazimicin: A thiocarbamate glycoside from Moringa oleifera Lam. seeds with a novel neuroprotective activity.

    Abdelsayed, Eman M / Medhat, Dalia / Mandour, Yasmine M / Hanafi, Rasha S / Motaal, Amira Abdel

    Journal of food biochemistry

    2021  Volume 45, Issue 12, Page(s) e13992

    Abstract: Moringa oleifera (MO) known as the miracle tree is a famous nutritional source in many countries. In this study, the neuroprotective activity of MO seeds was investigated. Fractions of the 70% ethanol seed extract of MO were injected at a dose of 250 mg ... ...

    Abstract Moringa oleifera (MO) known as the miracle tree is a famous nutritional source in many countries. In this study, the neuroprotective activity of MO seeds was investigated. Fractions of the 70% ethanol seed extract of MO were injected at a dose of 250 mg kg
    MeSH term(s) Amyloid beta-Peptides ; Animals ; Glycosides/pharmacology ; Molecular Docking Simulation ; Moringa oleifera ; Plant Extracts/pharmacology ; Rats ; Thiocarbamates
    Chemical Substances Amyloid beta-Peptides ; Glycosides ; Plant Extracts ; Thiocarbamates
    Language English
    Publishing date 2021-11-07
    Publishing country United States
    Document type Journal Article
    ZDB-ID 433846-7
    ISSN 1745-4514 ; 0145-8884
    ISSN (online) 1745-4514
    ISSN 0145-8884
    DOI 10.1111/jfbc.13992
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Design of Novel Enantiopure Dispirooxindolopyrrolidine-Piperidones as Promising Candidates toward COVID-19: Asymmetric Synthesis, Crystal Structure and

    Toumi, Amani / Boudriga, Sarra / Mandour, Yasmine M / Mekki, Ahmed A / Knorr, Michael / Strohmann, Carsten / Kirchhoff, Jan-Lukas / Sobeh, Mansour

    Molecules (Basel, Switzerland)

    2022  Volume 27, Issue 12

    Abstract: Despite the effectiveness of COVID-19 vaccines, there is still an urgent need for discovering new anti-viral drugs to address the awful spread and transmission of the rapidly modifiable virus. In this study, the ability of a small library of ... ...

    Abstract Despite the effectiveness of COVID-19 vaccines, there is still an urgent need for discovering new anti-viral drugs to address the awful spread and transmission of the rapidly modifiable virus. In this study, the ability of a small library of enantiomerically pure spirooxindolopyrrolidine-grafted piperidones to inhibit the main protease of SARS-CoV-2 (M
    MeSH term(s) Antiviral Agents/chemistry ; Antiviral Agents/pharmacology ; COVID-19/drug therapy ; COVID-19 Vaccines ; Cysteine Endopeptidases/chemistry ; Humans ; Molecular Docking Simulation ; Molecular Dynamics Simulation ; Piperidones ; Protease Inhibitors/chemistry ; SARS-CoV-2 ; Viral Nonstructural Proteins/metabolism
    Chemical Substances Antiviral Agents ; COVID-19 Vaccines ; Piperidones ; Protease Inhibitors ; Viral Nonstructural Proteins ; Cysteine Endopeptidases (EC 3.4.22.-)
    Language English
    Publishing date 2022-06-20
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 1413402-0
    ISSN 1420-3049 ; 1431-5165 ; 1420-3049
    ISSN (online) 1420-3049
    ISSN 1431-5165 ; 1420-3049
    DOI 10.3390/molecules27123945
    Database MEDical Literature Analysis and Retrieval System OnLINE

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