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Nimbarte VD, Wirmer‐Bartoschek J, Gande SL, Alshamleh I, Seibert M, Nasiri HR, Schnütgen F, Serve H, Schwalbe H. Synthesis and in Vitro Evaluation of Novel 5-Nitroindole Derivatives as c-Myc G-Quadruplex Binders with Anticancer Activity. ChemMedChem 2021; 16:1667-1679. [PMID: 33508167 PMCID: PMC8252724 DOI: 10.1002/cmdc.202000835] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Revised: 01/26/2021] [Indexed: 01/05/2023]
Abstract
Lead-optimization strategies for compounds targeting c-Myc G-quadruplex (G4) DNA are being pursued to develop anticancer drugs. Here, we investigate the structure-activity- relationship (SAR) of a newly synthesized series of molecules based on the pyrrolidine-substituted 5-nitro indole scaffold to target G4 DNA. Our synthesized series allows modulation of flexible elements with a structurally preserved scaffold. Biological and biophysical analyses illustrate that substituted 5-nitroindole scaffolds bind to the c-Myc promoter G-quadruplex. These compounds downregulate c-Myc expression and induce cell-cycle arrest in the sub-G1/G1 phase in cancer cells. They further increase the concentration of intracellular reactive oxygen species. NMR spectra show that three of the newly synthesized compounds interact with the terminal G-quartets (5'- and 3'-ends) in a 2 : 1 stoichiometry.
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Affiliation(s)
- Vijaykumar D. Nimbarte
- Institute for Organic Chemistry and Chemical BiologyCenter for Biomolecular Magnetic Resonance (BMRZ)Goethe University FrankfurtMax-von-Laue-Straße 760438Frankfurt am MainGermany
| | - Julia Wirmer‐Bartoschek
- Institute for Organic Chemistry and Chemical BiologyCenter for Biomolecular Magnetic Resonance (BMRZ)Goethe University FrankfurtMax-von-Laue-Straße 760438Frankfurt am MainGermany
| | - Santosh L. Gande
- Institute for Organic Chemistry and Chemical BiologyCenter for Biomolecular Magnetic Resonance (BMRZ)Goethe University FrankfurtMax-von-Laue-Straße 760438Frankfurt am MainGermany
- German Cancer Research Center and German Cancer ConsortiumIm Neuenheimer Feld 28069120HeidelbergGermany
| | - Islam Alshamleh
- Institute for Organic Chemistry and Chemical BiologyCenter for Biomolecular Magnetic Resonance (BMRZ)Goethe University FrankfurtMax-von-Laue-Straße 760438Frankfurt am MainGermany
| | - Marcel Seibert
- Department of Medicine 2Hematology/OncologyUniversity Hospital FrankfurtGoethe UniversityTheodor-Stern-Kai 760596Frankfurt am MainGermany
| | - Hamid Reza Nasiri
- Institute for Organic Chemistry and Chemical BiologyCenter for Biomolecular Magnetic Resonance (BMRZ)Goethe University FrankfurtMax-von-Laue-Straße 760438Frankfurt am MainGermany
| | - Frank Schnütgen
- German Cancer Research Center and German Cancer ConsortiumIm Neuenheimer Feld 28069120HeidelbergGermany
- Department of Medicine 2Hematology/OncologyUniversity Hospital FrankfurtGoethe UniversityTheodor-Stern-Kai 760596Frankfurt am MainGermany
- Frankfurt Cancer Institute (FCI)Theodor-Stern-Kai 760596Frankfurt am MainGermany
| | - Hubert Serve
- German Cancer Research Center and German Cancer ConsortiumIm Neuenheimer Feld 28069120HeidelbergGermany
- Department of Medicine 2Hematology/OncologyUniversity Hospital FrankfurtGoethe UniversityTheodor-Stern-Kai 760596Frankfurt am MainGermany
- Frankfurt Cancer Institute (FCI)Theodor-Stern-Kai 760596Frankfurt am MainGermany
| | - Harald Schwalbe
- Institute for Organic Chemistry and Chemical BiologyCenter for Biomolecular Magnetic Resonance (BMRZ)Goethe University FrankfurtMax-von-Laue-Straße 760438Frankfurt am MainGermany
- German Cancer Research Center and German Cancer ConsortiumIm Neuenheimer Feld 28069120HeidelbergGermany
- Frankfurt Cancer Institute (FCI)Theodor-Stern-Kai 760596Frankfurt am MainGermany
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Elamri I, Radloff M, Hohmann KF, Nimbarte VD, Nasiri HR, Bolte M, Safarian S, Michel H, Schwalbe H. Synthesis and Biological Screening of New Lawson Derivatives as Selective Substrate-Based Inhibitors of Cytochrome bo 3 Ubiquinol Oxidase from Escherichia coli. ChemMedChem 2020; 15:1262-1271. [PMID: 32159929 PMCID: PMC7497249 DOI: 10.1002/cmdc.201900707] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 02/20/2020] [Indexed: 01/13/2023]
Abstract
The respiratory chain of Escherichia coli contains two different types of terminal oxidase that are differentially regulated as a response to changing environmental conditions. These oxidoreductases catalyze the reduction of molecular oxygen to water and contribute to the proton motive force. The cytochrome bo3 oxidase (cyt bo3 ) acts as the primary terminal oxidase under atmospheric oxygen levels, whereas the bd-type oxidase is most abundant under microaerobic conditions. In E. coli, both types of respiratory terminal oxidase (HCO and bd-type) use ubiquinol-8 as electron donor. Here, we assess the inhibitory potential of newly designed and synthesized 3-alkylated Lawson derivatives through L-proline-catalyzed three-component reductive alkylation (TCRA). The inhibitory effects of these Lawson derivatives on the terminal oxidases of E. coli (cyt bo3 and cyt bd-I) were tested potentiometrically. Four compounds were able to reduce the oxidoreductase activity of cyt bo3 by more than 50 % without affecting the cyt bd-I activity. Moreover, two inhibitors for both cyt bo3 and cyt bd-I oxidase could be identified. Based on molecular-docking simulations, we propose binding modes of the new Lawson inhibitors. The molecular fragment benzyl enhances the inhibitory potential and selectivity for cyt bo3 , whereas heterocycles reduce this effect. This work extends the library of 3-alkylated Lawson derivatives as selective inhibitors for respiratory oxidases and provides molecular probes for detailed investigations of the mechanisms of respiratory-chain enzymes of E. coli.
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Affiliation(s)
- Isam Elamri
- Center for Biomolecular Magnetic Resonance Institute of Organic Chemistry and Chemical BiologyGoethe-Universität Frankfurt am MainMax-von Laue-Straße 760438Frankfurt am MainGermany
| | - Melanie Radloff
- Department of Molecular Membrane BiologyMax Planck Institute of BiophysicsMax-von-Laue-Straße 360438Frankfurt am MainGermany
| | - Katharina F. Hohmann
- Center for Biomolecular Magnetic Resonance Institute of Organic Chemistry and Chemical BiologyGoethe-Universität Frankfurt am MainMax-von Laue-Straße 760438Frankfurt am MainGermany
| | - Vijaykumar D. Nimbarte
- Center for Biomolecular Magnetic Resonance Institute of Organic Chemistry and Chemical BiologyGoethe-Universität Frankfurt am MainMax-von Laue-Straße 760438Frankfurt am MainGermany
| | - Hamid R. Nasiri
- Center for Biomolecular Magnetic Resonance Institute of Organic Chemistry and Chemical BiologyGoethe-Universität Frankfurt am MainMax-von Laue-Straße 760438Frankfurt am MainGermany
| | - Michael Bolte
- Institute for Inorganic ChemistryGoethe-UniversitätFrankfurt am MainGermany
| | - Schara Safarian
- Department of Molecular Membrane BiologyMax Planck Institute of BiophysicsMax-von-Laue-Straße 360438Frankfurt am MainGermany
| | - Hartmut Michel
- Department of Molecular Membrane BiologyMax Planck Institute of BiophysicsMax-von-Laue-Straße 360438Frankfurt am MainGermany
| | - Harald Schwalbe
- Center for Biomolecular Magnetic Resonance Institute of Organic Chemistry and Chemical BiologyGoethe-Universität Frankfurt am MainMax-von Laue-Straße 760438Frankfurt am MainGermany
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Elamri I, Radloff M, Hohmann KF, Nimbarte VD, Nasiri HR, Bolte M, Safarian S, Michel H, Schwalbe H. Front Cover: Synthesis and Biological Screening of New Lawson Derivatives as Selective Substrate‐Based Inhibitors of Cytochrome
bo
3
Ubiquinol Oxidase from
Escherichia coli
(ChemMedChem 14/2020). ChemMedChem 2020. [DOI: 10.1002/cmdc.202000481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Isam Elamri
- Center for Biomolecular Magnetic Resonance Institute of Organic Chemistry and Chemical Biology Goethe-Universität Frankfurt am Main Max-von Laue-Straße 7 60438 Frankfurt am Main Germany
| | - Melanie Radloff
- Department of Molecular Membrane Biology Max Planck Institute of Biophysics Max-von-Laue-Straße 3 60438 Frankfurt am Main Germany
| | - Katharina F. Hohmann
- Center for Biomolecular Magnetic Resonance Institute of Organic Chemistry and Chemical Biology Goethe-Universität Frankfurt am Main Max-von Laue-Straße 7 60438 Frankfurt am Main Germany
| | - Vijaykumar D. Nimbarte
- Center for Biomolecular Magnetic Resonance Institute of Organic Chemistry and Chemical Biology Goethe-Universität Frankfurt am Main Max-von Laue-Straße 7 60438 Frankfurt am Main Germany
| | - Hamid R. Nasiri
- Center for Biomolecular Magnetic Resonance Institute of Organic Chemistry and Chemical Biology Goethe-Universität Frankfurt am Main Max-von Laue-Straße 7 60438 Frankfurt am Main Germany
| | - Michael Bolte
- Institute for Inorganic Chemistry Goethe-Universität Frankfurt am Main Germany
| | - Schara Safarian
- Department of Molecular Membrane Biology Max Planck Institute of Biophysics Max-von-Laue-Straße 3 60438 Frankfurt am Main Germany
| | - Hartmut Michel
- Department of Molecular Membrane Biology Max Planck Institute of Biophysics Max-von-Laue-Straße 3 60438 Frankfurt am Main Germany
| | - Harald Schwalbe
- Center for Biomolecular Magnetic Resonance Institute of Organic Chemistry and Chemical Biology Goethe-Universität Frankfurt am Main Max-von Laue-Straße 7 60438 Frankfurt am Main Germany
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Saidi I, Nimbarte VD, Schwalbe H, Waffo-Téguo P, Harrath AH, Mansour L, Alwasel S, Ben Jannet H. Anti-tyrosinase, anti-cholinesterase and cytotoxic activities of extracts and phytochemicals from the Tunisian Citharexylum spinosum L.: Molecular docking and SAR analysis. Bioorg Chem 2020; 102:104093. [PMID: 32717693 DOI: 10.1016/j.bioorg.2020.104093] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 07/08/2020] [Accepted: 07/09/2020] [Indexed: 12/16/2022]
Abstract
Previously phytochemical investigations carried out on the flowers and trunk bark extracts of Citharexylum spinosum L. tree, allowed the isolation of twenty molecules belonging to several families of natural substances [triterpene acids, iridoid glycosides, phenylethanoid glycosides, 8,3'-neolignan glycosides, together with other phenolic compounds]. In the present work, a biological evaluation (anti-tyrosinase, anticholinesterase and cytotoxic activities) was performed on the prepared extracts and the isolated secondary metabolites. The results showed that the EtOAc extract of the trunk bark displayed the highest anti-tyrosinase effect with a percent inhibition of 55.0 ± 1.8% at a concentration of 100 µg/mL. The highest anticholinesterase activity was presented by the same extract with an IC50 value of 99.97 ± 3.01 µg/mL. The EtOAc extract of flowers and that of the trunk bark displayed the best cytotoxic property with IC50 values of 96.00 ± 2.85 and 88.75 ± 2.00 µg/mL, respectively, against the human cervical cancer cell line (HeLa), and IC50 values of 188.23 ± 3.88 and 197.00 ± 4.25 µg/mL, respectively, against the human lung cancer (A549) cell lines. Biological investigation of the pure compounds showed that the two 8,3'-neolignan glycosides, plucheosides D1-D2, generate the highest anti-tyrosinase potency with a percent inhibition of 61.4 ± 2.0 and 79.5 ± 2.3%, respectively, at a concentration of 100 µM. The iridoid glycosides exhibited a significant anticholinesterase activity with IC50 values ranging from 17.19 ± 1.02 to 52.24 ± 2.50 µM. Triterpene pentacyclic acids and iridoid glycosides exerted encouraging cytotoxic effects against HeLa with IC50 values ranging from 9.00 ± 1.10 to 25.00 ± 1.00 µM. The study of the structure-activity relationship (SAR) has been sufficiently and widely discussed. The natural compounds that exhibited the significant bioactivities were docked.
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Affiliation(s)
- Ilyes Saidi
- Laboratoire de Chimie Hétérocyclique, Produits Naturels et Réactivité (LR11ES39), Equipe: Chimie Médicinale et Produits Naturels, Faculté des Sciences de Monastir, Université de Monastir, Avenue de l'environnement, 5019 Monastir, Tunisia
| | - Vijaykumar D Nimbarte
- Institute for Organic Chemistry and Chemical Biology. Center for Biomolecular Magnetic Resonance Goethe University Frankfurt am Main Max-von-Laue-Strasse 7, 60438 Frankfurt/Main, Germany
| | - Harald Schwalbe
- Institute for Organic Chemistry and Chemical Biology. Center for Biomolecular Magnetic Resonance Goethe University Frankfurt am Main Max-von-Laue-Strasse 7, 60438 Frankfurt/Main, Germany
| | - Pierre Waffo-Téguo
- Univ. de Bordeaux, ISVV, EA 4577, Unité de recherche Œnologie 210 chemin de leysotte, CS50008, 33882 Villenave d'Ornon, France; INRA, ISVV, USC 1366 Œnologie, 210 Chemin de Leysotte, CS 50008, 33882 Villenave d'Ornon, France
| | - Abdel Halim Harrath
- King Saud University, Department of Zoology, College of Science, Riyadh, Saudi Arabia
| | - Lamjed Mansour
- King Saud University, Department of Zoology, College of Science, Riyadh, Saudi Arabia
| | - Saleh Alwasel
- King Saud University, Department of Zoology, College of Science, Riyadh, Saudi Arabia
| | - Hichem Ben Jannet
- Laboratoire de Chimie Hétérocyclique, Produits Naturels et Réactivité (LR11ES39), Equipe: Chimie Médicinale et Produits Naturels, Faculté des Sciences de Monastir, Université de Monastir, Avenue de l'environnement, 5019 Monastir, Tunisia.
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Chortani S, Nimbarte VD, Horchani M, Ben Jannet H, Romdhane A. Synthesis, biological evaluation and molecular docking analysis of novel benzopyrimidinone derivatives as potential anti-tyrosinase agents. Bioorg Chem 2019; 92:103270. [DOI: 10.1016/j.bioorg.2019.103270] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 08/13/2019] [Accepted: 09/09/2019] [Indexed: 10/26/2022]
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Aissa I, Nimbarte VD, Zardi-Bergaoui A, Znati M, Flamini G, Ascrizzi R, Jannet HB. Isocostic Acid, a Promising Bioactive Agent from the Essential Oil of Inula viscosa (L.): Insights from Drug Likeness Properties, Molecular Docking and SAR Analysis. Chem Biodivers 2019; 16:e1800648. [PMID: 30874370 DOI: 10.1002/cbdv.201800648] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Accepted: 02/04/2019] [Indexed: 02/04/2023]
Abstract
The chemical composition of the essential oil (LEO) and its volatile fractions (V1 -V10 ) collected during the hydrodistillation process every 15 min from the fresh leaves of I. viscosa (L.), growing in Tunisia, were analyzed by GC-FID and GC/MS. Eighty-two compounds, representing 90.9-99.4 % of the total samples, were identified. The crude essential oil (LEO) and its fractions (V1 -V10 ) were characterized by the presence of a high amount of oxygenated sesquiterpenes (82.7-95.8 %). Isocostic acid (1) was found to be the most abundant component (37.4-83.9 %) and was isolated from the same essential oil over silica gel column chromatography and identified by spectroscopic methods (1 H, 13 C, DEPT 135 NMR and EI-MS) and by comparison with literature data. Furthermore, the fresh leaves essential oil (LEO), its volatile fractions (V1 -V10 ) as well as compound 1 were screened for their antibacterial, antityrosinase, anticholinesterase and anti-5-lipoxygenase activities. It was found that the isolated compound 1 exhibited an interesting antibacterial activity against Staphylococcus aureus ATCC 25923 (MIC=32 μg/mL) and Enterococcus faecalis ATCC 29212 (MIC=32 μg/mL) and the highest antityrosinase activity (IC50 =13.82±0.87 μg/mL). Compound 1 was also found to be able to strongly inhibit 5-lipoxygenase with an IC50 value of 59.21±0.85 μg/mL. The bioactivity and drug likeness scores of compound 1 were calculated using Molinspiration software and interpreted, and the structure-activity relationship (SAR) was discussed with the help of molecular docking analysis.
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Affiliation(s)
- Ibrahim Aissa
- Laboratory of Heterocyclic Chemistry, Natural Products and Reactivity (LR11ES39), Team: Medicinal Chemistry and Natural Products, Faculty of Science of Monastir, University of Monastir, Avenue of Environment, 5019, Monastir, Tunisia
| | - Vijaykumar D Nimbarte
- Laboratory of Chemistry, URCOM, EA 3221, INC3M CNRS-F3038, UFR of Science and Technology, University of Le Havre BP: 1123, 25 rue Philipe Lebon, 76063, Le Havre Cedex, France
| | - Afifa Zardi-Bergaoui
- Laboratory of Heterocyclic Chemistry, Natural Products and Reactivity (LR11ES39), Team: Medicinal Chemistry and Natural Products, Faculty of Science of Monastir, University of Monastir, Avenue of Environment, 5019, Monastir, Tunisia
| | - Mansour Znati
- Laboratory of Heterocyclic Chemistry, Natural Products and Reactivity (LR11ES39), Team: Medicinal Chemistry and Natural Products, Faculty of Science of Monastir, University of Monastir, Avenue of Environment, 5019, Monastir, Tunisia
| | - Guido Flamini
- Dipartimento di Farmacia, Università di Pisa, Via Bonanno 6, 56126, Pisa, Italy.,Centro Interdipartimentale di Ricerca 'Nutraceutica e Alimentazione per la Salute' Nutrafood, University of Pisa, Via del Borghetto 80, 56124, Pisa, Italy
| | - Roberta Ascrizzi
- Dipartimento di Farmacia, Università di Pisa, Via Bonanno 6, 56126, Pisa, Italy
| | - Hichem Ben Jannet
- Laboratory of Heterocyclic Chemistry, Natural Products and Reactivity (LR11ES39), Team: Medicinal Chemistry and Natural Products, Faculty of Science of Monastir, University of Monastir, Avenue of Environment, 5019, Monastir, Tunisia
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Debbabi M, Nimbarte VD, Chekir S, Chortani S, Romdhane A, Ben jannet H. Design and synthesis of novel potent anticoagulant and anti-tyrosinase pyranopyrimidines and pyranotriazolopyrimidines: Insights from molecular docking and SAR analysis. Bioorg Chem 2019; 82:129-138. [DOI: 10.1016/j.bioorg.2018.10.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 09/21/2018] [Accepted: 10/04/2018] [Indexed: 01/17/2023]
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8
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Narasimha Rao MP, Nagaraju B, Kovvuri J, Polepalli S, Alavala S, Vishnuvardhan MVPS, Swapna P, Nimbarte VD, Lakshmi JK, Jain N, Kamal A. Synthesis of imidazo-thiadiazole linked indolinone conjugates and evaluated their microtubule network disrupting and apoptosis inducing ability. Bioorg Chem 2017; 76:420-436. [PMID: 29275261 DOI: 10.1016/j.bioorg.2017.11.021] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 11/04/2017] [Accepted: 11/30/2017] [Indexed: 10/18/2022]
Abstract
A series of imidazo[2,1-b][1,3,4]thiadiazole linked indolinone conjugates were synthesized and investigated for antiproliferative activity in different human cancer cell lines by changing various substitutions at indolinone and phenyl ring systems. Among them conjugates 7, 14 and 15 were exhibited potent antiproliferative activity with GI50 values from 0.13 to 3.8 μΜ and evaluated for cell cycle analysis, tubulin polymerization assay and apoptosis. Treatment with 7, 14 and 15 were resulted in accumulation of cells in G2/M phase, inhibition of tubulin assembly, disruption of microtubule network. Inhibition of tubulin polymerization was further supported by Western blot analysis. In addition, the conjugates (7, 14 and 15) also showed apoptosis in HeLa cell line, detailed biological studies such as Hoechst 33,258 staining, DNA fragmentation and caspase-3 assays suggested that these compounds induce cell death by apoptosis. Docking studies revealed that these compounds (7, 14 and 15) bind with αAsn101, αThr179, αSer178, βCys241, βLys254 and βLys352 in the colchicine-binding site of the tubulin.
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Affiliation(s)
- M P Narasimha Rao
- Medicinal Chemistry and Biotechnology Division, CSIR - Indian Institute of Chemical Technology, Hyderabad 500 007, India
| | - Burri Nagaraju
- Medicinal Chemistry and Biotechnology Division, CSIR - Indian Institute of Chemical Technology, Hyderabad 500 007, India
| | - Jeshma Kovvuri
- Medicinal Chemistry and Biotechnology Division, CSIR - Indian Institute of Chemical Technology, Hyderabad 500 007, India
| | - Sowjanya Polepalli
- Centre for Chemical Biology Division, CSIR - Indian Institute of Chemical Technology, Hyderabad 500 007, India
| | - Sateesh Alavala
- Pharmacology & Toxicology Division, CSIR - Indian Institute of Chemical Technology, Hyderabad 500 007, India
| | - M V P S Vishnuvardhan
- Medicinal Chemistry and Biotechnology Division, CSIR - Indian Institute of Chemical Technology, Hyderabad 500 007, India
| | - P Swapna
- Medicinal Chemistry and Biotechnology Division, CSIR - Indian Institute of Chemical Technology, Hyderabad 500 007, India
| | - Vijaykumar D Nimbarte
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Educational & Research, Hyderabad 500 037, India
| | - Jerripothula K Lakshmi
- Centre for Nuclear Magnetic Resonance & Structural Chemistry, CSIR - Indian Institute of Chemical Technology, Hyderabad 500 007, India
| | - Nishant Jain
- Centre for Chemical Biology Division, CSIR - Indian Institute of Chemical Technology, Hyderabad 500 007, India
| | - Ahmed Kamal
- Medicinal Chemistry and Biotechnology Division, CSIR - Indian Institute of Chemical Technology, Hyderabad 500 007, India; Pharmacology & Toxicology Division, CSIR - Indian Institute of Chemical Technology, Hyderabad 500 007, India.
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Aliyenne A, Pin F, Nimbarte VD, Lawson AM, Comesse S, Sanselme M, Tognetti V, Joubert L, Daïch A. Bi(OTf)3
-Catalysed Access to 2,3-Substituted Isoindolinones and Tricyclic N,O-Acetals by Trapping of Bis-N
-Acyliminium Species in a Tandem Process. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600530] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Ahmed Aliyenne
- Normandie Univ.; UNIHAVRE; CNRS; URCOM 76600 Le Havre France
- Ecole Normale Supérieure de Nouakchott; Département des Sciences Exactes; B.P. 990 Ksar Nouakchott Mauritania
| | - Frédéric Pin
- Normandie Univ.; UNIHAVRE; CNRS; URCOM 76600 Le Havre France
| | | | | | | | | | | | | | - Adam Daïch
- Normandie Univ.; UNIHAVRE; CNRS; URCOM 76600 Le Havre France
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Kamal A, Reddy TS, Vishnuvardhan M, Nimbarte VD, Subba Rao A, Srinivasulu V, Shankaraiah N. Synthesis of 2-aryl-1,2,4-oxadiazolo-benzimidazoles: Tubulin polymerization inhibitors and apoptosis inducing agents. Bioorg Med Chem 2015; 23:4608-4623. [DOI: 10.1016/j.bmc.2015.05.060] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2015] [Revised: 05/29/2015] [Accepted: 05/30/2015] [Indexed: 12/19/2022]
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11
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Kamal A, Balakrishna M, Nayak VL, Shaik TB, Faazil S, Nimbarte VD. Design and synthesis of imidazo[2,1-b]thiazole-chalcone conjugates: microtubule-destabilizing agents. ChemMedChem 2014; 9:2766-80. [PMID: 25313981 DOI: 10.1002/cmdc.201402310] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Indexed: 01/09/2023]
Abstract
A series of chalcone conjugates featuring the imidazo[2,1-b]thiazole scaffold was designed, synthesized, and evaluated for their cytotoxic activity against five human cancer cell lines (MCF-7, A549, HeLa, DU-145 and HT-29). These new hybrid molecules have shown promising cytotoxic activity with IC50 values ranging from 0.64 to 30.9 μM. Among them, (E)-3-(6-(4-fluorophenyl)-2,3-bis(4-methoxyphenyl)imidazo[2,1-b]thiazol-5-yl)-1-(pyridin-2-yl)prop-2-en-1-one (11 x) showed potent antiproliferative activity with IC50 values ranging from 0.64 to 1.44 μM in all tested cell lines. To investigate the mechanism of action, the detailed biological aspects of this promising conjugate (11 x) were carried out on the A549 lung cancer cell line. The tubulin polymerization assay and immunofluoresence analysis results suggest that this conjugate effectively inhibits microtubule assembly in A549 cells. Flow cytometric analysis revealed that this conjugate induces cell-cycle arrest in the G2/M phase and leads to apoptotic cell death. This was further confirmed by Hoechst staining, activation of caspase-3, DNA fragmentation analysis, and Annexin V-FITC assay. Moreover, molecular docking studies indicated that this conjugate (11 x) interacts and binds efficiently with the tubulin protein.
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Affiliation(s)
- Ahmed Kamal
- Medicinal Chemistry & Pharmacology, Council of Science and Industrial Research, Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007 (India); Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad-500 037 (India).
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12
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Kamal A, Rao MPN, Das P, Swapna P, Polepalli S, Nimbarte VD, Mullagiri K, Kovvuri J, Jain N. Synthesis and Biological Evaluation of Imidazo[2,1-b][1,3,4]thiadiazole-Linked Oxindoles as Potent Tubulin Polymerization Inhibitors. ChemMedChem 2014; 9:1463-75. [DOI: 10.1002/cmdc.201400069] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Indexed: 01/06/2023]
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Kamal A, Ashraf M, Khan MNA, Nimbarte VD, Faazil S, Subba Reddy NV, Taj S. Retracted: Synthesis and Cytotoxic Activity of 2-Anilinopyridine-3-Acrylamides as Tubulin Polymerization Inhibitors. ChemMedChem 2014; 9:1615. [DOI: 10.1002/cmdc.201400036] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Indexed: 11/11/2022]
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Kamal A, Reddy NVS, Nayak VL, Reddy VS, Prasad B, Nimbarte VD, Srinivasulu V, Vishnuvardhan MVPS, Reddy CS. Synthesis and Biological Evaluation of Benzo[b]furans as Inhibitors of Tubulin Polymerization and Inducers of Apoptosis. ChemMedChem 2013; 9:117-28. [DOI: 10.1002/cmdc.201300366] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2013] [Revised: 10/17/2013] [Indexed: 11/06/2022]
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