- Structure-Guided Discovery of the Novel Covalent Allosteric Site and Covalent Inhibitors of Fructose-1,6-Bisphosphate Aldolase to Overcome the Azole Resistance of Candidiasis
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Fructose-1,6-bisphosphate aldolase (FBA) represents an attractive new antifungal target. Here, we employed a structure-based optimization strategy to discover a novel covalent binding site (C292 site) and the first-in-class covalent allosteric inhibitors
- Cao, Hongxuan,Chen, Han,Han, Xinya,Huang, Yunyuan,Liu, Jiaqi,Peng, Chao,Rao, Li,Ren, Yanliang,Sheng, Chunquan,Su, Chen,Tu, Jie,Wan, Chen,Wan, Jian,Wen, Wuqiang
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p. 2656 - 2674
(2022/02/09)
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- The Mpro structure-based modifications of ebselen derivatives for improved antiviral activity against SARS-CoV-2 virus
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The main protease (Mpro or 3CLpro) of SARS-CoV-2 virus is a cysteine enzyme critical for viral replication and transcription, thus indicating a potential target for antiviral therapy. A recent repurposing effort has identified ebselen, a multifunctional drug candidate as an inhibitor of Mpro. Our docking of ebselen to the binding pocket of Mpro crystal structure suggests a noncovalent interaction for improvement of potency, antiviral activity and selectivity. To test this hypothesis, we designed and synthesized ebselen derivatives aimed at enhancing their non-covalent bonds within Mpro. The inhibition of Mpro by ebselen derivatives (0.3 μM) was screened in both HPLC and FRET assays. Nine ebselen derivatives (EBs) exhibited stronger inhibitory effect on Mpro with IC50 of 0.07–0.38 μM. Further evaluation of three derivatives showed that EB2-7 exhibited the most potent inhibition of SARS-CoV-2 viral replication with an IC50 value of 4.08 μM in HPAepiC cells, as compared to the prototype ebselen at 24.61 μM. Mechanistically, EB2-7 functions as a noncovalent Mpro inhibitor in LC-MS/MS assay. Taken together, our identification of ebselen derivatives with improved antiviral activity may lead to developmental potential for treatment of COVID-19 and SARS-CoV-2 infection.
- Jin, Lin,Luo, Jiajie,Qiao, Zhen,Wang, KeWei,Wei, Ningning,Zhang, Hongyi,Zhang, Yanru
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- Discovery and Mechanism of SARS-CoV-2 Main Protease Inhibitors
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The emergence of a new coronavirus, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), presents an urgent public health crisis. Without available targeted therapies, treatment options remain limited for COVID-19 patients. Using medicinal chemistry and rational drug design strategies, we identify a 2-phenyl-1,2-benzoselenazol-3-one class of compounds targeting the SARS-CoV-2 main protease (Mpro). FRET-based screening against recombinant SARS-CoV-2 Mpro identified six compounds that inhibit proteolysis with nanomolar IC50 values. Preincubation dilution experiments and molecular docking determined that the inhibition of SARS-CoV-2 Mpro can occur by either covalent or noncovalent mechanisms, and lead E04 was determined to inhibit Mpro competitively. Lead E24 inhibited viral replication with a nanomolar EC50 value (844 nM) in SARS-CoV-2-infected Vero E6 cells and was further confirmed to impair SARS-CoV-2 replication in human lung epithelial cells and human-induced pluripotent stem cell-derived 3D lung organoids. Altogether, these studies provide a structural framework and mechanism of Mpro inhibition that should facilitate the design of future COVID-19 treatments.
- Bray, William,Carlin, Aaron F.,Clark, Alex E.,Endsley, Mark,Huante, Matthew B.,Huff, Sarah,Kummetha, Indrasena Reddy,Rana, Tariq M.,Smith, Davey,Tiwari, Shashi Kant,Wang, Shaobo
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supporting information
(2021/10/20)
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- Synthesis of new alkylated and methoxylated analogues of ebselen with antiviral and antimicrobial properties
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A series of new mono and disubstituted alkylated and methoxylated benzisoselanzol-3(2H)-ones and bis(2carbamoylaryl)diselenides were prepared in yields ranging from 55% to 95% starting from anthranilic acid and were evaluated for antiviral and antimicrobial activity. The compounds exhibited antiviral activity against Human herpes virus 1 and Encephalomyocarditis virus as well as antimicrobial activity against Staphylococcus aureus, Bacillus subtilis, Escherichia coli and Candida albicans. R1 O O R1 COOH N N R2 H Se R2 NH2 Se 2 R1, R2 = Me, OMe, Cl, t-Bu, H.
- Pi?tka-Ottlik, Magdalena,Burda-Grabowska, Ma?gorzata,Wo?na, Marta,Waleńska, Joanna,Kaleta, Rafa?,Zaczyńska, Ewa,Piasecki, Egbert,Giurg, Miros?aw
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p. 546 - 556
(2021/02/09)
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- Benzisoselenazolone derivative, preparation method and application in anti-coronavirus drugs
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The invention belongs to the technical field of anti-coronavirus drug discovery, discloses a benzisoselenazolone derivative, a preparation method and application of the benzisoselenazolone derivativein coronavirus resistance, and relates to synthesis of a
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Paragraph 0172; 0173; 0175
(2020/12/31)
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- 1,2-BENZISOSELENAZOL-3(2H)-ONE AND 1,2-BENZISOTHIAZOL-3(2H)-ONE DERIVATIVES AS BETA-LACTAM ANTIBIOTIC ADJUVANTS
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Provided herein are compositions and methods useful in the treatment of beta-lactam antibiotic resistant bacteria.
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Paragraph 0190; 0191; 0192; 0193
(2019/10/04)
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- Water-dependent synthesis of biologically active diaryl diselenides
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A new one-step method for the synthesis of diaryl diselenides has been developed. The reaction of o-iodobenzamides with dilithium diselenide can be controlled by the presence of water providing a simple and efficient protocol to obtain benzisoselenazolones or diaryl diselenides. A series of N-Aryl ebselen derivatives and the corresponding diselenides was obtained. All synthesized compounds were tested in vitro as antioxidants and cytotoxic agents. N-(2,3,4-Trimethoxyphenyl)benzisoselenazol-3(2H)-one was the best in vitro antioxidant and the corresponding diselenide the most potent cytotoxic agent against prostate cancer cell line DU145, being inactive towards healthy prostate cell line PNT1A. Formula parented.
- Pacu?a, Agata J.,Obieziurska, Magdalena,?cianowski, Jacek,Kaczor, Katarzyna B.,Antosiewicz, J?drzej
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p. 153 - 164
(2018/07/05)
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- Investigation of synergistic antimicrobial effects of the drug combinations of meropenem and 1,2-benzisoselenazol-3(2H)-one derivatives on carbapenem-resistant Enterobacteriaceae producing NDM-1
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The worldwide prevalence of NDM-1-producing bacteria has drastically undermined the clinical efficacy of the last line antibiotic of carbapenems, prompting a need to devise effective strategy to preserve their clinical value. Our previous studies have shown that ebselen can restore the efficacy of meropenem against a laboratory strain that produces NDM-1. Here we report the construction of a focused compound library of 1,2-benzisoselenazol-3(2H)-one derivatives which comprise a total of forty-six candidate compounds. The structure-activity relationship of these compounds and their potential to serve as an adjuvant to enhance the antimicrobial efficacy of meropenem against a collection of clinical NDM-1-producing carbapenem-resistant Enterobacteriaceae isolates was examined. Drug combination assays indicated that these derivatives exhibited synergistic antimicrobial activity when used along with meropenem, effectively restoring the activity of carbapenems against the resistant strains tested in a Galleria mellonella larvae in vivo infection model. The mode of inhibition of one compound, namely 11_a38, which was depicted when tested on the purified NDM-1 enzyme, indicated that it could covalently bind to the enzyme and displaced one zinc ion from the active site. Overall, this study provides a novel 1,2-benzisoselenazol-3(2H)-one scaffold that exhibits strong synergistic antimicrobial activity with carbapenems, and low cytotoxicity. The prospect of application of such compounds as carbapenem adjuvants warrants further evaluation.
- Jin, Wen Bin,Xu, Chen,Cheng, Qipeng,Qi, Xiao Lin,Gao, Wei,Zheng, Zhiwei,Chan, Edward W.C.,Leung, Yun-Chung,Chan, Tak Hang,Wong, Kwok-Yin,Chen, Sheng,Chan, Kin-Fai
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p. 285 - 302
(2018/07/13)
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- Thermal and Photoinduced Copper-Promoted C-Se Bond Formation: Synthesis of 2-Alkyl-1,2-benzisoselenazol-3(2H)-ones and Evaluation against Mycobacterium tuberculosis
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2-Alkyl-1,2-benzisoselenazol-3(2H)-ones, represented by ebselen (1a), are being studied intensively for a range of medicinal applications. We describe both a new thermal and photoinduced copper-mediated cross-coupling between potassium selenocyanate (KSeCN) and N-substituted ortho-halobenzamides to form 2-alkyl-1,2-benzisoselenazol-3(2H)-ones containing a C-Se-N bond. The copper ligand (1,10-phenanthroline) facilitates C-Se bond formation during heating via a mechanism that likely involves atom transfer (AT), whereas, in the absence of ligand, photoinduced activation likely proceeds through a single electron transfer (SET) mechanism. A library of 15 2-alkyl-1,2-benzisoselenazol-3(2H)-ones was prepared. One member of the library was azide-containing derivative 1j that was competent to undergo a strain-promoted azide-alkyne cycloaddition. The library was evaluated for inhibition of Mycobacterium tuberculosis (Mtb) growth and Mtb Antigen 85C (Mtb Ag85C) activity. Compound 1f was most potent with a minimal inhibitory concentration (MIC) of 12.5 μg/mL and an Mtb Ag85C apparent IC50 of 8.8 μM.
- Thanna, Sandeep,Goins, Christopher M.,Knudson, Susan E.,Slayden, Richard A.,Ronning, Donald R.,Sucheck, Steven J.
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p. 3844 - 3854
(2017/04/13)
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- SUBSTITUTED ISOSELENAZOLONE ANTI-INFLAMMATORY, ANTI-CANCER, CYTOPROTECTIVE, NEUROPROTECTIVE, AND ANTI-OXIDANT AGENTS
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Compounds, compositions, and methods for the treatment of infections, inflammation, cancers, tinnitus, Meniere's disease, hearing loss, or bipolar disorder, or for providing cytoprotection against Clostridium difficile toxins, are disclosed.
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Paragraph 00195; 00196; 00303; 00304
(2018/04/11)
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- Synthesis of new alkylated and methoxylated analogues of ebselen with antiviral and antimicrobial properties
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A series of new mono and disubstituted alkylated and methoxylated benzisoselanzol-3(2H)-ones and bis(2-carbamoylaryl)diselenides were prepared in yields ranging from 55% to 95% starting from anthranilic acid and were evaluated for antiviral and antimicrobial activity. The compounds exhibited antiviral activity against Human herpes virus 1 and Encephalomyocarditis virus as well as antimicrobial activity against Staphylococcus aureus, Bacillus subtilis, Escherichia coli and Candida albicans. (Chemical Equation Presented).
- Pietka-Ottlik, Magdalena,Burda-Grabowska, Ma?gorzata,Wo?na, Marta,Waleńska, Joanna,Kaleta, Rafa?,Zaczyńska, Ewa,Piasecki, Egbert,Giurg, Miros?aw
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p. 546 - 556
(2017/03/14)
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- Reaction of bis[(2-chlorocarbonyl)phenyl] diselenide with phenols, aminophenols, and other amines towards diphenyl diselenides with antimicrobial and antiviral properties ?
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A reaction of bis[(2-chlorocarbonyl)phenyl] diselenide with various mono and bisnucleophiles such as aminophenols, phenols, and amines have been studied as a convenient general route to a series of new antimicrobial and antiviral diphenyl diselenides. The compounds, particularly bis[2-(hydroxyphenylcarbamoyl)]phenyl diselenides and reference benzisoselenazol-3(2H)-ones, exhibited high antimicrobial activity against Gram-positive bacterial species (Enterococcus spp., Staphylococcus spp.), and some compounds were also active against Gram-negative E. coli and fungi (Candida spp., A. Niger). The majority of compounds demonstrated high activity against human herpes virus type 1 (HHV-1) and moderate activity against encephalomyocarditis virus (EMCV), while they were generally inactive against vesicular stomatitis virus (VSV).
- Giurg, Miros?aw,Go?ab, Anna,Suchodolski, Jakub,Kaleta, Rafa?,Krasowska, Anna,Piasecki, Egbert,Pietka-Ottlik, Magdalena
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- Identification of methionine aminopeptidase 2 as a molecular target of the organoselenium drug ebselen and its derivatives/analogues: Synthesis, inhibitory activity and molecular modeling study
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A collection of twenty-six organoselenium compounds, ebselen and its structural analogues, provided a novel approach for inhibiting the activity of human methionine aminopeptidase 2 (MetAP2). This metalloprotease, being responsible for the removal of the amino-terminal methionine from newly synthesized proteins, plays a key role in angiogenesis, which is essential for the progression of diseases, including solid tumor cancers. In this work, we discovered that ebselen, a synthetic organoselenium drug molecule with anti-inflammatory, anti-oxidant and cytoprotective activity, inhibits one of the main enzymes in the tumor progression pathway. Using three-step synthesis, we obtained twenty-five ebselen derivatives/analogues, ten of which are new, and tested their inhibitory activity toward three neutral aminopeptidases (MetAP2, alanine and leucine aminopeptidases). All of the tested compounds proved to be selective, slow-binding inhibitors of MetAP2. Similarly to ebselen, most of its analogues exhibited a moderate potency (IC50= 1–12 μM). Moreover, we identified three strong inhibitors that bind favorably to the enzyme with the half maximal inhibitory concentration in the submicromolar range.
- W?glarz-Tomczak, Ewelina,Burda-Grabowska, Ma?gorzata,Giurg, Miros?aw,Mucha, Artur
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p. 5254 - 5259
(2016/11/09)
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- Highly efficient synthesis and antioxidant capacity of N-substituted benzisoselenazol-3(2H)-ones
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A new, general one step synthesis of N-substituted benzisoselenazol-3(2H)-ones based on the reaction of o-iodobenzamides with lithium diselenide, is described. A series of alkyl and aryl derivatives was obtained in high yields (up to 98%). Their GPx-like antioxidant activity, tested by NMR, showed a significantly higher activity than ebselen.
- Pacula, Agata J.,cianowski, Jacek,Aleksandrzak, Krzysztof B.
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p. 49959 - 49962
(2014/12/10)
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- Photochemical Reaction of 2-Aryl-1,2-benzisoselenazol-3(2H)-ones
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The photochemical reaction of 2-aryl-1,2-benzisoselenazol-3(2H)-ones (1) in benzene was found to give dibenzoselenazepin-11(10H)-ones (2).On the other hand, the photochemical reaction of 1 in t-butyl alcohol afforded 2-(2-hydroxy-2-methylpropylseleno)benzanilide, 2-(methylseleno)benzanilide, and 2-aryl-1,2-benzisoselenazol-3(2H)-one 1-oxides together with the photoisomer 2.Mechanisms for these reactions are proposed.
- Kamigata, Nobumasa,Iizuka, Hirokazu,Izuoka, Akira,Kobayashi, Michio
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p. 2179 - 2184
(2007/10/02)
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