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  1. Article ; Online: Kinetic degradation study for the first licensed anti-influenza polymerase inhibitor, baloxavir marboxil, using high-performance liquid chromatography-mass spectrometry.

    Hafez, Hani M / Abdel-Halim, Mohammad / Hemdan, Ahmed / Hammam, Mennatallah A

    Journal of separation science

    2022  Volume 45, Issue 14, Page(s) 2488–2497

    Abstract: The first licensed polymerase inhibitor, baloxavir marboxil was recently approved for the treatment of influenza A and B viruses. Furthermore, there is growing interest in testing the antiviral activity of baloxavir marboxil against Coronavirus. Despite ... ...

    Abstract The first licensed polymerase inhibitor, baloxavir marboxil was recently approved for the treatment of influenza A and B viruses. Furthermore, there is growing interest in testing the antiviral activity of baloxavir marboxil against Coronavirus. Despite its critical clinical value, there is no information on the degradation products, pathways, or kinetics of baloxavir marboxil under various stress conditions. In this study, a new high-performance liquid chromatography-ultraviolet detection method for accurately quantifying baloxavir marboxil in the presence of its degradation products was developed. A study of degradation kinetics revealed that acidic, thermal neutral, and photolytic degradation reactions have zero-order kinetics, whereas basic and oxidative degradation reactions have first-order kinetics. The structural characterization of baloxavir marboxil degradation products was performed by coupling the optimized high-performance liquid chromatography method to the triple-quadrupole tandem mass spectrometer. The proposed approach was validated according to the International Council for Harmonisation Q2 (R1) requirements for accuracy, precision, robustness, specificity, and linearity. The validated new method was successfully used to analyze baloxavir marboxil as raw material and its pharmaceutical dosage form, Xofluza.
    MeSH term(s) Antiviral Agents/therapeutic use ; Chromatography, High Pressure Liquid ; Dibenzothiepins ; Humans ; Influenza, Human/drug therapy ; Mass Spectrometry ; Morpholines ; Oxazines/therapeutic use ; Pyridines ; Pyridones ; Thiepins/therapeutic use ; Triazines
    Chemical Substances Antiviral Agents ; Dibenzothiepins ; Morpholines ; Oxazines ; Pyridines ; Pyridones ; Thiepins ; Triazines ; baloxavir (4G86Y4JT3F)
    Language English
    Publishing date 2022-05-20
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2047990-6
    ISSN 1615-9314 ; 1615-9306
    ISSN (online) 1615-9314
    ISSN 1615-9306
    DOI 10.1002/jssc.202200020
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Synthesis and evaluation of novel N1-acylated 5-(4-pyridinyl)indazole derivatives as potent and selective haspin inhibitors.

    Shawky, Mona M / Abdallah, Mennatallah / Khalifa, Hend / Aboushady, Youssef / Abadi, Ashraf H / Engel, Matthias / Abdel-Halim, Mohammad

    Bioorganic chemistry

    2024  Volume 145, Page(s) 107235

    Abstract: Protein kinase dysregulation was strongly linked to cancer pathogenesis. Moreover, histone alterations were found to be among the most important post-translational modifications that could contribute to cancer growth and development. In this context, ... ...

    Abstract Protein kinase dysregulation was strongly linked to cancer pathogenesis. Moreover, histone alterations were found to be among the most important post-translational modifications that could contribute to cancer growth and development. In this context, haspin, an atypical serine/threonine kinase, phosphorylates histone H3 at threonine-3 and is notably overexpressed in various common cancer types. Herein, we report novel 5-(4-pyridinyl)indazole derivatives as potent and selective haspin inhibitors. Amide coupling at N1 of the indazole ring with m-hydroxyphenyl acetic acid yielded compound 21 with an IC
    MeSH term(s) Intracellular Signaling Peptides and Proteins/metabolism ; Indazoles/pharmacology ; Protein Serine-Threonine Kinases ; Histones/metabolism ; Phosphorylation ; Antineoplastic Agents/pharmacology ; Protein Kinase Inhibitors/pharmacology
    Chemical Substances Intracellular Signaling Peptides and Proteins ; Indazoles ; Protein Serine-Threonine Kinases (EC 2.7.11.1) ; Histones ; Antineoplastic Agents ; Protein Kinase Inhibitors
    Language English
    Publishing date 2024-02-20
    Publishing country United States
    Document type Journal Article
    ZDB-ID 120080-x
    ISSN 1090-2120 ; 0045-2068
    ISSN (online) 1090-2120
    ISSN 0045-2068
    DOI 10.1016/j.bioorg.2024.107235
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: N

    Aboelfotouh, Habiba G / Abdallah, Mennatallah / Khalifa, Hend / Aboushady, Youssef / Abadi, Ashraf H / Engel, Matthias / Abdel-Halim, Mohammad

    Archiv der Pharmazie

    2024  , Page(s) e2400020

    Abstract: Haspin and Clk4 are both understudied protein kinases (PKs), offering potential targets for the development of new anticancer agents. Thus, the identification of new inhibitors targeting these PKs is of high interest. However, the inhibitors targeting ... ...

    Abstract Haspin and Clk4 are both understudied protein kinases (PKs), offering potential targets for the development of new anticancer agents. Thus, the identification of new inhibitors targeting these PKs is of high interest. However, the inhibitors targeting haspin or Clk4 developed to date show a poor selectivity profile over other closely related PKs, increasing the risk of side effects. Herein, we present two newly developed N
    Language English
    Publishing date 2024-03-13
    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.202400020
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Advancements in Phosphodiesterase 5 Inhibitors: Unveiling Present and Future Perspectives.

    ElHady, Ahmed K / El-Gamil, Dalia S / Abdel-Halim, Mohammad / Abadi, Ashraf H

    Pharmaceuticals (Basel, Switzerland)

    2023  Volume 16, Issue 9

    Abstract: Phosphodiesterase 5 (PDE5) inhibitors presented themselves as important players in the nitric oxide/cGMP pathway, thus exerting a profound impact on various physiological and pathological processes. Beyond their well-known efficacy in treating male ... ...

    Abstract Phosphodiesterase 5 (PDE5) inhibitors presented themselves as important players in the nitric oxide/cGMP pathway, thus exerting a profound impact on various physiological and pathological processes. Beyond their well-known efficacy in treating male erectile dysfunction (ED) and pulmonary arterial hypertension (PAH), a plethora of studies have unveiled their significance in the treatment of a myriad of other diseases, including cognitive functions, heart failure, multiple drug resistance in cancer therapy, immune diseases, systemic sclerosis and others. This comprehensive review aims to provide an updated assessment of the crucial role played by PDE5 inhibitors (PDE5-Is) as disease-modifying agents taking their limiting side effects into consideration. From a medicinal chemistry and drug discovery perspective, the published PDE5-Is over the last 10 years and their binding characteristics are systemically discussed, and advancement in properties is exposed. A persistent challenge encountered with these agents lies in their limited isozyme selectivity; considering this obstacle, this review also highlights the breakthrough development of the recently reported PDE5 allosteric inhibitors, which exhibit an unparalleled level of selectivity that was rarely achievable by competitive inhibitors. The implications and potential impact of these novel allosteric inhibitors are meticulously explored. Additionally, the concept of multi-targeted ligands is critically evaluated in relation to PDE5-Is by inspecting the broader spectrum of their molecular interactions and effects. The objective of this review is to provide insight into the design of potent, selective PDE5-Is and an overview of their biological function, limitations, challenges, therapeutic potentials, undergoing clinical trials, future prospects and emerging uses, thus guiding upcoming endeavors in both academia and industry within this domain.
    Language English
    Publishing date 2023-09-06
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2193542-7
    ISSN 1424-8247
    ISSN 1424-8247
    DOI 10.3390/ph16091266
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Kinetic degradation study for the first licensed anti‐influenza polymerase inhibitor, baloxavir marboxil, using high‐performance liquid chromatography‐mass spectrometry

    Hafez, Hani M. / Abdel‐Halim, Mohammad / Hemdan, Ahmed / Hammam, Mennatallah A.

    Journal of separation science. 2022 July, v. 45, no. 14

    2022  

    Abstract: The first licensed polymerase inhibitor, baloxavir marboxil was recently approved for the treatment of influenza A and B viruses. Furthermore, there is growing interest in testing the antiviral activity of baloxavir marboxil against Coronavirus. Despite ... ...

    Abstract The first licensed polymerase inhibitor, baloxavir marboxil was recently approved for the treatment of influenza A and B viruses. Furthermore, there is growing interest in testing the antiviral activity of baloxavir marboxil against Coronavirus. Despite its critical clinical value, there is no information on the degradation products, pathways, or kinetics of baloxavir marboxil under various stress conditions. In this study, a new high‐performance liquid chromatography‐ultraviolet detection method for accurately quantifying baloxavir marboxil in the presence of its degradation products was developed. A study of degradation kinetics revealed that acidic, thermal neutral, and photolytic degradation reactions have zero‐order kinetics, whereas basic and oxidative degradation reactions have first‐order kinetics. The structural characterization of baloxavir marboxil degradation products was performed by coupling the optimized high‐performance liquid chromatography method to the triple‐quadrupole tandem mass spectrometer. The proposed approach was validated according to the International Council for Harmonisation Q2 (R1) requirements for accuracy, precision, robustness, specificity, and linearity. The validated new method was successfully used to analyze baloxavir marboxil as raw material and its pharmaceutical dosage form, Xofluza.
    Keywords Orthocoronavirinae ; antiviral properties ; dosage forms ; high performance liquid chromatography ; influenza ; mass spectrometry ; photolysis ; raw materials ; separation ; spectrometers
    Language English
    Dates of publication 2022-07
    Size p. 2488-2497.
    Publishing place John Wiley & Sons, Ltd
    Document type Article
    Note JOURNAL ARTICLE
    ZDB-ID 2047990-6
    ISSN 1615-9314 ; 1615-9306
    ISSN (online) 1615-9314
    ISSN 1615-9306
    DOI 10.1002/jssc.202200020
    Database NAL-Catalogue (AGRICOLA)

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  6. Article ; Online: Taurine loaded chitosan-pectin nanoparticle shows curative effect against acetic acid-induced colitis in rats.

    Ahmed, Osama / Abdel-Halim, Mohammad / Farid, Alyaa / Elamir, Azza

    Chemico-biological interactions

    2021  Volume 351, Page(s) 109715

    Abstract: Owing to the poor outcomes and adverse side effects of existing ulcerative colitis drugs, the study aimed to develop an alternative nano-based treatment approach. The study was designed to characterize the in vitro and in vivo properties of taurine, ... ...

    Abstract Owing to the poor outcomes and adverse side effects of existing ulcerative colitis drugs, the study aimed to develop an alternative nano-based treatment approach. The study was designed to characterize the in vitro and in vivo properties of taurine, taurine-loaded chitosan pectin nanoparticles (Tau-CS-PT-NPs) and chitosan pectin nanoparticles (CS-PT-NPs) in the therapy of acetic acid (AA)-induced colitis in rats. CS-PT-NPs and Tau-CS-PT-NPs were prepared by ionic gelation method then in vitro characterized, including transmission electron microscopy (TEM), polydispersity index (PDI), zeta potential, Fourier transform infrared (FTIR) spectroscopy, encapsulation efficiency (EE), and drug release profile. Following colitis induction, rats were orally administrated with free taurine, Tau-CS-PT-NPs, and CS-PT-NPs once per day for six days. The sizes of Tau-CS-PT-NPs and CS-PT-NPs were 74.17 ± 2.88 nm and 42.22 ± 2.41 nm, respectively. EE was about 69.09 ± 1.58%; furthermore, 60% of taurine was released in 4 h in simulated colon content. AA-induced colitis in untreated rats led to necrosis of colon tissues and a significant increase in interleukin-1beta (IL-1β), Tumor Necrosis Factor-alpha (TNF-α), myeloperoxidase (MPO), and malondialdehyde (MDA) levels associated with a remarkable reduction in glutathione (GSH) level in colon tissue in comparison to control group. Treatment with taurine, Tau-CS-PT-NPs, and CS-PT-NPs partly reversed these effects. The present study demonstrated that the administration of free taurine, CS-PT-NPs, and Tau-CS-PT-NPs exerted beneficial effects in acetic acid-induced colitis by their anti-inflammatory and antioxidant activities. The best therapeutic effect was observed in animals treated with taurine-loaded chitosan pectin nanoparticles.
    MeSH term(s) Acetic Acid ; Animals ; Anti-Inflammatory Agents/chemistry ; Anti-Inflammatory Agents/therapeutic use ; Chitosan/chemistry ; Colitis/chemically induced ; Colitis/drug therapy ; Colitis/pathology ; Drug Carriers/chemistry ; Drug Liberation ; Male ; Nanoparticles/chemistry ; Oxidative Stress/drug effects ; Pectins/chemistry ; Rats, Wistar ; Taurine/chemistry ; Taurine/therapeutic use ; Rats
    Chemical Substances Anti-Inflammatory Agents ; Drug Carriers ; Taurine (1EQV5MLY3D) ; Pectins (89NA02M4RX) ; Chitosan (9012-76-4) ; Acetic Acid (Q40Q9N063P)
    Language English
    Publishing date 2021-10-22
    Publishing country Ireland
    Document type Journal Article
    ZDB-ID 218799-1
    ISSN 1872-7786 ; 0009-2797
    ISSN (online) 1872-7786
    ISSN 0009-2797
    DOI 10.1016/j.cbi.2021.109715
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  7. Article ; Online: The skin delivery of tofacitinib citrate using transethosomes and hybridized ethosomes/nanostructured lipid carriers for vitiligo therapy: Dermatopharmacokinetics and in vivo assays.

    Hesham, Heba / Rady, Mai / Hathout, Rania M / Abdel-Halim, Mohammad / Mansour, Samar

    International journal of pharmaceutics

    2022  Volume 629, Page(s) 122387

    Abstract: Vitiligo is an autoimmune disease where its current treatment strategies are lengthy in course and do not guarantee complete cure. Tofacitinib citrate (JAK inhibitor) is a potential cure of vitiligo through halting JAK-STAT pathway preventing the ... ...

    Abstract Vitiligo is an autoimmune disease where its current treatment strategies are lengthy in course and do not guarantee complete cure. Tofacitinib citrate (JAK inhibitor) is a potential cure of vitiligo through halting JAK-STAT pathway preventing the destruction of melanocytes. The dermato-pharmacokinetics of the prepared transethosomes (Et) and the hybridized ethosomes/nanostructured lipid carriers (Eth/NLC), namely formulations; M.E-Cr and M.E-S.M, were evaluated. In addition, in vivo studies on C57/BL6 vitiligo mouse model were conducted to confirm effectiveness of Tofacitinib citrate delivery. The results unveiled that the transethosomes (359.46 ± 11.82 nm) were suitable for dermal delivery while M.E-Cr (179.64 ± 11.16 nm), a hybrid Eth/NLC formulation, was mostly suitable for transdermal delivery. Nevertheless, another hybrid formulation, M.E-S.M (253.60 ± 14.64 nm), was apt for both dermal and transdermal delivery. The histopathology confirmed re-pigmentation of mice skin where formulations Et and M.E-S.M showed severe pigmentation compared to the control healthy and induced mice. On the other hand, M.E-Cr showed mild pigmentation. Immunohistochemical assay was performed to evaluate infiltration of CD 8
    MeSH term(s) Mice ; Animals ; Vitiligo/drug therapy ; Vitiligo/metabolism ; Janus Kinases/metabolism ; Janus Kinases/pharmacology ; Janus Kinases/therapeutic use ; STAT Transcription Factors/metabolism ; STAT Transcription Factors/pharmacology ; STAT Transcription Factors/therapeutic use ; Signal Transduction ; Skin/metabolism ; Lipids/pharmacology ; Drug Carriers/metabolism
    Chemical Substances tofacitinib (87LA6FU830) ; Janus Kinases (EC 2.7.10.2) ; STAT Transcription Factors ; Lipids ; Drug Carriers
    Language English
    Publishing date 2022-11-11
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 428962-6
    ISSN 1873-3476 ; 0378-5173
    ISSN (online) 1873-3476
    ISSN 0378-5173
    DOI 10.1016/j.ijpharm.2022.122387
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Novel 9-Benzylaminoacridine Derivatives as Dual Inhibitors of Phosphodiesterase 5 and Topoisomerase II for the Treatment of Colon Cancer.

    Ammar, Lina / Lin, Hung-Yu / Shih, Shou-Ping / Tsai, Tsen-Ni / Syu, Yu-Ting / Abdel-Halim, Mohammad / Hwang, Tsong-Long / Abadi, Ashraf H

    Molecules (Basel, Switzerland)

    2023  Volume 28, Issue 2

    Abstract: It has been shown that phosphodiesterase 5 (PDE5) inhibitors have anticancer effects in a variety of malignancies in both in vivo and in vitro experiments. The role of cGMP elevation in colorectal carcinoma (CRC) has been extensively studied. ... ...

    Abstract It has been shown that phosphodiesterase 5 (PDE5) inhibitors have anticancer effects in a variety of malignancies in both in vivo and in vitro experiments. The role of cGMP elevation in colorectal carcinoma (CRC) has been extensively studied. Additionally, DNA topoisomerase II (Topo II) inhibition is a well-established mechanism of action that mediates the effects of several approved anticancer drugs such as doxorubicin and mitoxantrone. Herein, we present 9-benzylaminoacridine derivatives as dual inhibitors of the PDE5 and Topo II enzymes. We synthesized 31 derivatives and evaluated them against PDE5, whereby 22 compounds showed micromolar or sub-micromolar inhibition. The anticancer activity of the compounds was evaluated with the NCI 60-cell line testing. Moreover, the effects of the compounds on HCT-116 colorectal carcinoma (CRC) were extensively studied, and potent compounds against HCT-116 cells were studied for their effects on Topo II, cell cycle progression, and apoptosis. In addition to exhibiting significant growth inhibition against HCT116 cells, compounds
    MeSH term(s) Humans ; Antineoplastic Agents/pharmacology ; Cell Line, Tumor ; Cell Proliferation ; Colonic Neoplasms/drug therapy ; Cyclic Nucleotide Phosphodiesterases, Type 5/metabolism ; DNA Topoisomerases, Type II/metabolism ; Drug Screening Assays, Antitumor ; Molecular Structure ; Structure-Activity Relationship ; Topoisomerase II Inhibitors/pharmacology ; Phosphodiesterase 5 Inhibitors/pharmacology
    Chemical Substances Antineoplastic Agents ; Cyclic Nucleotide Phosphodiesterases, Type 5 (EC 3.1.4.35) ; DNA Topoisomerases, Type II (EC 5.99.1.3) ; Topoisomerase II Inhibitors ; Phosphodiesterase 5 Inhibitors
    Language English
    Publishing date 2023-01-14
    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/molecules28020840
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Novel 6-hydroxybenzothiazol-2-carboxamides as potent and selective monoamine oxidase B inhibitors endowed with neuroprotective activity.

    Al-Saad, Omar M / Gabr, Moustafa / Darwish, Sarah S / Rullo, Mariagrazia / Pisani, Leonardo / Miniero, Daniela Valeria / Liuzzi, Grazia Maria / Kany, Andreas M / Hirsch, Anna K H / Abadi, Ashraf H / Engel, Matthias / Catto, Marco / Abdel-Halim, Mohammad

    European journal of medicinal chemistry

    2024  Volume 269, Page(s) 116266

    Abstract: In neurodegenerative diseases, using a single molecule that can exert multiple effects to modify the disease may have superior activity over the classical "one molecule-one target" approach. Herein, we describe the discovery of 6-hydroxybenzothiazol-2- ... ...

    Abstract In neurodegenerative diseases, using a single molecule that can exert multiple effects to modify the disease may have superior activity over the classical "one molecule-one target" approach. Herein, we describe the discovery of 6-hydroxybenzothiazol-2-carboxamides as highly potent and selective MAO-B inhibitors. Variation of the amide substituent led to several potent compounds having diverse side chains with cyclohexylamide 40 displaying the highest potency towards MAO-B (IC
    MeSH term(s) Humans ; Monoamine Oxidase Inhibitors/pharmacology ; Monoamine Oxidase Inhibitors/chemistry ; Neuroprotection ; Neuroblastoma ; Monoamine Oxidase/metabolism ; Neurodegenerative Diseases ; Structure-Activity Relationship
    Chemical Substances Monoamine Oxidase Inhibitors ; Monoamine Oxidase (EC 1.4.3.4)
    Language English
    Publishing date 2024-02-28
    Publishing country France
    Document type Journal Article
    ZDB-ID 188597-2
    ISSN 1768-3254 ; 0009-4374 ; 0223-5234
    ISSN (online) 1768-3254
    ISSN 0009-4374 ; 0223-5234
    DOI 10.1016/j.ejmech.2024.116266
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. 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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