Publications by authors named "Al-Karmalawy A"

Ethnopharmacological Relevance: Sphagneticola trilobata was traditionally used to alleviate wounds using topical plant preparations. The precise mechanism of the plant responsible for its wound healing effect are still unclear. Although the plant was reported to be cytotoxic, there is a lack of reported data regarding its cytotoxic impact on skin cancer.

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In this current work, we dedicated efforts to designing and synthesizing new 1,2,3-triazole-analogues (5a-d), (6a-d), and (7a-c) to act as dual VEGFR-2 and telomerase inhibitors with promising apoptotic potential. The synthesized analogues were examined against eleven diverse types of cancer cells and two normal cells to assess their ability to inhibit cell growth (GI%). Obviously, compound 7b showed the best average GI% (75.

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Many cancers have displayed resistance to chemotherapeutic drugs over the past few decades. EGFR has emerged as a leading target for cancer therapy inhibiting tumor angiogenesis. Besides, studies strongly suggest that blocking telomerase activity could be an effective way to control the growth of certain cancer cells.

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  • The ethyl acetate extract from the endophytic fungus Aspergillus terreus found in Artemisia arborescens L. led to the discovery of five new compounds, asperterreunolides A-E, along with a known metabolite, butyrolactone IV.
  • Using advanced spectroscopic techniques, the researchers determined the structures and the absolute configurations of these metabolites.
  • All isolated compounds exhibited significant cytotoxic effects against certain cancer cell lines, and molecular docking studies suggested their potential mechanism of action as inhibitors of type IIA topoisomerase.
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Many plants are reported to enhance cognition in amnesic-animal models. The metabolite profile of fruit methanolic extract (CDFME) was characterized by LC-QTOF-MS/MS, and its total phenolics content (TPC) and total flavonoids content (TFC) were determined. In parallel, its cognitive-enhancing effect on scopolamine (SCOP)-induced AD in rats was evaluated.

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There is merit in investigating novel therapeutic molecules that hit vital targets during the viral infection cycle disrupting the interaction between SARS-CoV-2's spike glycoprotein and the host's angiotensin converting enzyme 2 (ACE2) receptor, potentially offering new avenues for treatment. Accordingly, lipid-based vesicular systems like liposomes or niosomes are frequently utilized to overcome these hurdles. Thus, chemically synthesized compounds were encapsulated within PEGylated bilosomes (PBs) to improve their solubility and intestinal permeability, thereby enhancing their anti-SARS-CoV-2 effectiveness.

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  • - The study focuses on the SARS-CoV-2 main protease enzyme (Mpro) as a key target for developing therapies against COVID-19, following the significant global impact of the pandemic.
  • - Researchers utilized a computer-aided drug discovery process, which included designing a structure-based pharmacophore and filtering compounds from the ZINC chemical database, resulting in 703 potential candidates for Mpro inhibition.
  • - The top candidate, compound W1 (ZINC000150656136), demonstrated strong binding properties and interactions with Mpro, with promising docking scores, suggesting it could be a lead compound for further experimental validation and clinical testing.
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Staphylococcus aureus (S. aureus) is a prominent infectious etiological agent in humans, dairy animals, and camels. Camel milk has all the nutrients which are nutritious and advantageous to the growth of S.

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This study examines Dabigatran's (Dab) capacity to mitigate methotrexate (MTX)-induced coagulation disorders and endothelial dysfunction, while exploring its effects on oxidative stress and inflammatory pathways (NF-kB/IL-1β/MCP-1, TLR4/NLRP3) in reducing hepatotoxicity. Rats were assigned to four groups: a control group receiving saline intraperitoneally (i.p.

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A series of new 6-amidocoumarin derivatives, 3a-j, was synthesized and evaluated for their inhibitory activity against monoamine oxidase (MAO) and cholinesterase. All compounds, except 3 g, showed higher inhibitory activity towards MAO-B than MAO-A. Compound 3i most potently inhibited MAO-B with an IC value of 0.

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  • - In this study, researchers created new compounds based on roflumilast to specifically inhibit the PDE-4B enzyme, using a set of synthesized compounds (4a-u, 5a-i, and 6) that were tested against PDE-4B and compared to roflumilast.
  • - Four compounds (4i, 4k, 4p, and 4q) showed strong inhibitory activity with 4p being the most potent (IC = 5.50 nM), even outperforming roflumilast (IC = 2.36 nM) in terms of potency.
  • - The selective inhibition characteristics of these compounds were analyzed, with compound 4k
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  • Inflammation is a complex process that causes pain and involves the release of inflammatory mediators, prompting research into new treatments such as selenium-containing compounds (OSe).
  • This study evaluated the anti-inflammatory properties of four specific selenium-based compounds (8, 9, 10, and 11) by measuring their effects on inflammatory markers COX-2, IL-1β, and IL-6, showing promising downregulation results.
  • Molecular docking and dynamics simulations indicated strong binding affinities of these compounds to the COX-2 enzyme, suggesting they could be effective anti-inflammatory agents worth further development.
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In this work, additional effort was applied to design new BIBR1532-based analogues with potential inhibitory activity against telomerase and acting as multitarget antitumor candidates to overcome the resistance problem. Therefore, novel substituted N-phenyl-2-((6-phenylpyridazin-3-yl)thio)acetamide candidates (4a-n) were synthesized. Applying the lead optimization strategy of the previously designed compound 8e; compound 4l showed an improved telomerase inhibition of 64.

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Microtubules are highly dynamic structures and constitute a crucial component of the cellular cytoskeleton. Besides, topoisomerases (Topo) play a fundamental role in maintaining the appropriate structure and organization of DNA. On the other hand, dual mechanism drug candidates for cancer treatment primarily aim to enhance the efficacy of cancer treatment and potentially overcome drug resistance.

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  • * The effectiveness of these compounds was tested against various human cancer cell lines, with some showing strong antiproliferative properties and low toxicity to normal cells, indicating a promising therapeutic potential.
  • * Among the tested derivatives, compound 10a emerged as the most potent EGFR inhibitor, demonstrating significant binding and inhibition compared to a reference drug, Erlotinib, emphasizing its potential as an anticancer agent.
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Even though legumes are valuable medicinal plants with edible seeds that are extensively consumed worldwide, there is little information available on the metabolic variations between different dietary beans and their influence as potential anti-cholinesterase agents. High-resolution liquid chromatography coupled with mass spectrometry in positive and negative ionization modes combined with multivariate analysis were used to explore differences in the metabolic profiles of five commonly edible seeds, fava bean, black-eyed pea, kidney bean, red lentil, and chickpea. A total of 139 metabolites from various classes were identified including saponins, alkaloids, phenolic acids, iridoids, and terpenes.

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Background: Organoselenium (OSe) agents and Schiff bases have demonstrated immense potential in the pharmaceutical field due to their broad spectrum of medicinal activities.

Methods: We herein report the antitumor activities of bis diselenide-based Schiff bases (3a-3c) derived from bis(4-aminophenyl)diselenide 2 and organoselenide-based Schiff bases (5a-c) derived from p-(methylselanyl)phenyl amine (4). The antitumor activity was estimated against fifteen cancer cell lines.

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Since the start of the pandemic, considerable advancements have been made in our understanding of the effects of SARS-CoV-2 infection and the associated COVID-19 on the hepatic system. There is a broad range of clinical symptoms for COVID-19. It affects multiple systems and has a dominant lung illness depending on complications.

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This research work aimed to identify the main components that are responsible for the sedative properties of hop cones and allocate their targets. This investigation was performed through molecular docking, molecular dynamic simulations, root mean square fluctuation (RMSF) analysis, and DFT calculation techniques. The tested compounds from were compared to diazepam and paroxetine.

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Chromone-based compounds have established cytotoxic, antiproliferative, antimetastatic, and antiangiogenic effects on various cancer cell types via modulating different molecular targets. Herein, 17 novel chromone-2-carboxamide derivatives were synthesized and evaluated for their in vitro anticancer activity against 15 human cancer cell lines. Among the tested cell lines, MDA-MB-231, the triple-negative breast cancer cell line, was found to be the most sensitive, where the N-(2-furylmethylene) (15) and the α-methylated N-benzyl (17) derivatives demonstrated the highest growth inhibition with GI values of 14.

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A series of tetrahydrobenzo[b]thiophene derivatives was designed and synthesized as dual topoisomerase (Topo) I/II inhibitors implicating potential DNA intercalation. Ethyl-2-amino-3-cyano-4,5,6,7-tetrahydrobenzo[b]thiophene-4-carboxylate (1) was prepared by modification of the Gewald reaction procedure using a FeO nanocatalyst and then it was used as a building block for the synthesis of tetrahydrobenzo[b]thiophene candidates (2-14). Interestingly, compound 14 showed the best cytotoxic potential against hepatocellular, colorectal, and breast cancer cell lines (IC = 7.

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Organoselenium (OSe) agents hold promise for preventing cancer due to their potential ability to fight cancer development and protect cells from oxidative damage. Herein, OSe-based maleanilic and succinanilic acids were tested to estimate their antitumor activities against fifteen cancer cell lines. Besides, their potential safety and selectivity were further investigated against two normal cell lines, namely, human skin fibroblasts (HSF) and olfactory ensheathing cell line (OEC) using the growth inhibition percentage (GI%) assay.

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Herein, we describe the design and synthesis of novel aryl pyrimidine benzenesulfonamides APBSs 5a-n, 6a-c, 7a-b, and 8 as pazopanib analogues to explore new potent and selective inhibitors for the CA IX. All APBSs were examined in vitro for their promising inhibition activity against a small panel of hCAs (isoforms I, II, IX, and XII). The X-ray crystal structure of CA I in adduct with a representative APBS analogue was solved.

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Article Synopsis
  • This study introduces new small molecules, specifically substituted 1,3,5-triazines, designed as second-generation inhibitors targeting IDH1 and IDH2, building on the structures of existing drugs like vorasidenib and enasidenib. !* -
  • Among the tested compounds, 6b showed significant effectiveness against leukemia cell lines with low micromolar growth inhibition (GI) values and demonstrated superior anti-tumor activity compared to cisplatin in specific cancer cells. !* -
  • The candidate 6b exhibited remarkable dual inhibitory potential against IDH1 and IDH2, increased levels of important tumor-suppressing proteins, and resulted in notable tumor reduction and health improvements in a
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