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Mali G, Kumar Yadav V, Priya H, Shukla M, Pandey P, Kumar A, Paranjothy M, Bhattacharyya S, Erande RD. The rapid construction and biological evaluation of densely substituted pyrrolo[1,2- a]indoles via a BF 3·OEt 2-assisted cascade approach. Org Biomol Chem 2023. [PMID: 38038241 DOI: 10.1039/d3ob01457f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2023]
Abstract
Lewis-acid cascade reactions promoted by BF3·OEt2 are reported for the synthesis of highly substituted pyrrolo[1,2-a]indoles and congeners of benzofuro[2,3-b]indoles. These reactions are highly regio- and diastereoselective towards generating up to five contiguous stereogenic centers, including two vicinal quaternary centers. Furthermore, an established cascade approach and the mechanism proposed herein are well supported by quantum chemistry calculations. In addition, a self-dimerization intermediate was trapped and isolated to establish a strategy for potential access to both pyrrolo and benzo indole derivatives, leaving sufficient freedom for broadening. Furthermore, in-silico molecular docking and all atomistic molecular dynamic (MD) simulation analysis suggests that the synthesized pyrrolo[1,2-a]indole derivatives stably bind at the active site of the mycobacterial secreted tyrosine phosphatase B (MptpB) enzyme, an emerging anti-mycobacterial drug target. Deep learning-based affinity predictions and MMPBGBSA-based energy calculations of the docked poses are presented herein.
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Affiliation(s)
- Ghanshyam Mali
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur 342037, Rajasthan, India.
| | - Vinay Kumar Yadav
- Department of Bioscience & Bioengineering, Indian Institute of Technology Jodhpur, Jodhpur 342037, Rajasthan, India
| | - Himani Priya
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur 342037, Rajasthan, India.
| | - Manjari Shukla
- Department of Bioscience & Bioengineering, Indian Institute of Technology Jodhpur, Jodhpur 342037, Rajasthan, India
| | - Peeyush Pandey
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur 342037, Rajasthan, India.
| | - Akhilesh Kumar
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea
| | - Manikandan Paranjothy
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur 342037, Rajasthan, India.
| | - Sudipta Bhattacharyya
- Department of Bioscience & Bioengineering, Indian Institute of Technology Jodhpur, Jodhpur 342037, Rajasthan, India
| | - Rohan D Erande
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur 342037, Rajasthan, India.
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2
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Kovermann M, Stefan A, Palazzetti C, Immler F, Dal Piaz F, Bernardi L, Cimone V, Bellone ML, Hochkoeppler A. The Mycobacterium tuberculosis protein tyrosine phosphatase MptpA features a pH dependent activity overlapping the bacterium sensitivity to acidic conditions. Biochimie 2023; 213:66-81. [PMID: 37201648 DOI: 10.1016/j.biochi.2023.04.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 04/03/2023] [Accepted: 04/24/2023] [Indexed: 05/20/2023]
Abstract
The Mycobacterium tuberculosis low-molecular weight protein tyrosine phosphatase (MptpA) is responsible for the inhibition of phagosome-lysosome fusion and is essential for the bacterium pathogenicity. This inhibition implies that M. tuberculosis is not exposed to a strongly acidic environment in vivo, enabling successful propagation in host cells. Remarkably, MptpA has been previously structurally and functionally investigated, with special emphasis devoted to the enzyme properties at pH 8.0. Considering that the virulence of M. tuberculosis is strictly dependent on the avoidance of acidic conditions in vivo, we analysed the pH-dependence of the structural and catalytic properties of MptpA. Here we show that this enzyme undergoes pronounced conformational rearrangements when exposed to acidic pH conditions, inducing a severe decrease of the enzymatic catalytic efficiency at the expense of phosphotyrosine (pTyr). In particular, a mild decrease of pH from 6.5 to 6.0 triggers a significant increase of K0.5 of MptpA for phosphotyrosine, the phosphate group of which we determined to feature a pKa2 equal to 5.7. Surface plasmon resonance experiments confirmed that MptpA binds poorly to pTyr at pH values < 6.5. Notably, the effectiveness of the MptpA competitive inhibitor L335-M34 at pH 6 does largely outperform the inhibition exerted at neutral or alkaline pH values. Overall, our observations indicate a pronounced sensitivity of MptpA to acidic pH conditions, and suggest the search for competitive inhibitors bearing a negatively charged group featuring pKa values lower than that of the substrate phosphate group.
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Affiliation(s)
- Michael Kovermann
- Department of Chemistry, University of Konstanz, Universitätstraße 10, 78464, Konstanz, Germany
| | - Alessandra Stefan
- Department of Pharmacy and Biotechnology, University of Bologna, Viale Risorgimento 4, 40136, Bologna, Italy; CSGI, University of Florence, Via della Lastruccia 3, 50019, Sesto Fiorentino, Firenze, Italy
| | - Chiara Palazzetti
- Department of Pharmacy and Biotechnology, University of Bologna, Viale Risorgimento 4, 40136, Bologna, Italy
| | - Fabian Immler
- Department of Chemistry, University of Konstanz, Universitätstraße 10, 78464, Konstanz, Germany
| | - Fabrizio Dal Piaz
- Department of Medicine, University of Salerno, Via Giovanni Paolo II 132, 84084, Fisciano, Italy
| | - Luca Bernardi
- Department of Industrial Chemistry "Toson Montanaro", University of Bologna, Viale Risorgimento 4, 40136, Bologna, Italy
| | - Valentina Cimone
- Department of Pharmacy and Biotechnology, University of Bologna, Viale Risorgimento 4, 40136, Bologna, Italy
| | - Maria Laura Bellone
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II 132, 84084, Fisciano, Italy
| | - Alejandro Hochkoeppler
- Department of Pharmacy and Biotechnology, University of Bologna, Viale Risorgimento 4, 40136, Bologna, Italy; CSGI, University of Florence, Via della Lastruccia 3, 50019, Sesto Fiorentino, Firenze, Italy.
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Sulyman AO, Fulcher J, Crossley S, Fatokun AA, Olorunniji FJ. Shikonin and Juglone Inhibit Mycobacterium tuberculosis Low-Molecular-Weight Protein Tyrosine Phosphatase a (Mt-PTPa). BIOTECH 2023; 12:59. [PMID: 37754203 PMCID: PMC10526854 DOI: 10.3390/biotech12030059] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 08/21/2023] [Accepted: 09/12/2023] [Indexed: 09/28/2023] Open
Abstract
Low-molecular-weight protein tyrosine phosphatases (LMW-PTPs) are involved in promoting the intracellular survival of Mycobacterium tuberculosis (Mtb), the causative organism of tuberculosis. These PTPs directly alter host signalling pathways to evade the hostile environment of macrophages and avoid host clearance. Among these, protein tyrosine phosphatase A (Mt-PTPa) is implicated in phagosome acidification failure, thereby inhibiting phagosome maturation to promote Mycobacterium tuberculosis (Mtb) survival. In this study, we explored Mt-PTPa as a potential drug target for treating Mtb. We started by screening a library of 502 pure natural compounds against the activities of Mt-PTPa in vitro, with a threshold of 50% inhibition of activity via a <500 µM concentration of the candidate drugs. The initial screen identified epigallocatechin, myricetin, rosmarinic acid, and shikonin as hits. Among these, the naphthoquinone, shikonin (5, 8-dihydroxy-2-[(1R)-1-hydroxy-4-methyl-3-pentenyl]-1,4-naphthoquinone), showed the strongest inhibition (IC50 33 µM). Further tests showed that juglone (5-hydroxy-1,4-naphthalenedione), another naphthoquinone, displayed similar potent inhibition of Mt-PTPa to shikonin. Kinetic analysis of the inhibition patterns suggests a non-competitive inhibition mechanism for both compounds, with inhibitor constants (Ki) of 8.5 µM and 12.5 µM for shikonin and juglone, respectively. Our findings are consistent with earlier studies suggesting that Mt-PTPa is susceptible to specific allosteric modulation via a non-competitive or mixed inhibition mechanism.
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Affiliation(s)
- Abdulhakeem O. Sulyman
- Department of Biochemistry, Faculty of Pure and Applied Sciences, Kwara State University, Malete 241103, Nigeria
- School of Pharmacy & Biomolecular Sciences, Faculty of Science, Liverpool John Moores University, Byrom Street, Liverpool L3 3AF, UK
| | - Jessie Fulcher
- School of Pharmacy & Biomolecular Sciences, Faculty of Science, Liverpool John Moores University, Byrom Street, Liverpool L3 3AF, UK
| | - Samuel Crossley
- School of Pharmacy & Biomolecular Sciences, Faculty of Science, Liverpool John Moores University, Byrom Street, Liverpool L3 3AF, UK
| | - Amos A. Fatokun
- School of Pharmacy & Biomolecular Sciences, Faculty of Science, Liverpool John Moores University, Byrom Street, Liverpool L3 3AF, UK
| | - Femi J. Olorunniji
- School of Pharmacy & Biomolecular Sciences, Faculty of Science, Liverpool John Moores University, Byrom Street, Liverpool L3 3AF, UK
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4
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Alphonse S, Djemil I, Piserchio A, Ghose R. Structural basis for the recognition of the bacterial tyrosine kinase Wzc by its cognate tyrosine phosphatase Wzb. Proc Natl Acad Sci U S A 2022; 119:e2201800119. [PMID: 35737836 PMCID: PMC9245664 DOI: 10.1073/pnas.2201800119] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 05/07/2022] [Indexed: 12/25/2022] Open
Abstract
Bacterial tyrosine kinases (BY-kinases) comprise a family of protein tyrosine kinases that are structurally distinct from their functional counterparts in eukaryotes and are highly conserved across the bacterial kingdom. BY-kinases act in concert with their counteracting phosphatases to regulate a variety of cellular processes, most notably the synthesis and export of polysaccharides involved in biofilm and capsule biogenesis. Biochemical data suggest that BY-kinase function involves the cyclic assembly and disassembly of oligomeric states coupled to the overall phosphorylation levels of a C-terminal tyrosine cluster. This process is driven by the opposing effects of intermolecular autophosphorylation, and dephosphorylation catalyzed by tyrosine phosphatases. In the absence of structural insight into the interactions between a BY-kinase and its phosphatase partner in atomic detail, the precise mechanism of this regulatory process has remained poorly defined. To address this gap in knowledge, we have determined the structure of the transiently assembled complex between the catalytic core of the Escherichia coli (K-12) BY-kinase Wzc and its counteracting low-molecular weight protein tyrosine phosphatase (LMW-PTP) Wzb using solution NMR techniques. Unambiguous distance restraints from paramagnetic relaxation effects were supplemented with ambiguous interaction restraints from static spectral perturbations and transient chemical shift changes inferred from relaxation dispersion measurements and used in a computational docking protocol for structure determination. This structurepresents an atomic picture of the mode of interaction between an LMW-PTP and its BY-kinase substrate, and provides mechanistic insight into the phosphorylation-coupled assembly/disassembly process proposed to drive BY-kinase function.
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Affiliation(s)
- Sébastien Alphonse
- Department of Chemistry and Biochemistry, The City College of New York, New York, NY 10031
| | - Imane Djemil
- PhD Program in Biochemistry, The Graduate Center of The City University of New York (CUNY), New York, NY 10016
| | - Andrea Piserchio
- Department of Chemistry and Biochemistry, The City College of New York, New York, NY 10031
| | - Ranajeet Ghose
- Department of Chemistry and Biochemistry, The City College of New York, New York, NY 10031
- PhD Program in Biochemistry, The Graduate Center of The City University of New York (CUNY), New York, NY 10016
- PhD Program in Chemistry, The Graduate Center of CUNY, New York, NY 10016
- PhD Program in Physics, The Graduate Center of CUNY, New York, NY 10016
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5
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Menegatti ACO. Targeting protein tyrosine phosphatases for the development of antivirulence agents: Yersinia spp. and Mycobacterium tuberculosis as prototypes. BIOCHIMICA ET BIOPHYSICA ACTA. PROTEINS AND PROTEOMICS 2022; 1870:140782. [PMID: 35470106 DOI: 10.1016/j.bbapap.2022.140782] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 04/15/2022] [Accepted: 04/19/2022] [Indexed: 06/14/2023]
Abstract
Protein phosphorylation mediated by protein kinases and phosphatases has a central regulatory function in many cellular processes in eukaryotes and prokaryotes. As a result, several diseases caused by imbalance in phosphorylation levels are known, especially due to protein tyrosine phosphatases (PTPs) activity, an important family of signaling enzymes. Furthermore, over the last decades several studies have shown the main role of PTPs in pathogenic bacteria: they are associated with growth, cell division, cell wall biosynthesis, biofilm formation, metabolic processes, as well as virulence factor. In this way, PTPs have ascended as targets for antibacterial drug design, particularly in view of the antibiotic resistance in pathogenic bacteria, which demands novel therapeutics strategies. Targeting secreted PTPs is an antivirulence strategy to combat the emergence of antimicrobial resistance (AMR). This review focuses on the recent advances in understanding the role of PTPs and the approaches to target them, with an emphasis in Yersinia spp. and Mycobacterium tuberculosis pathogenesis.
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Affiliation(s)
- Angela Camila Orbem Menegatti
- Departamento de Biologia Molecular, Centro de Ciências Exatas e da Natureza, Universidade Federal da Paraíba, Paraíba, Brazil.
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Jain A, Maji S, Shukla K, Kumari A, Garg S, Metre RK, Bhattacharyya S, Rana NK. Stereoselective synthesis of tri-substituted tetrahydrothiophenes and their in silico binding against mycobacterial protein tyrosine phosphatase B. Org Biomol Chem 2022; 20:3124-3135. [PMID: 35343552 DOI: 10.1039/d2ob00052k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A facile approach to tri-substituted tetrahydrothiophenes via thia-Michael/aldol has been developed. The cascade reaction was carried out in the presence of 5 mol% of DABCO in ethyl acetate to afford diversely functionalized tetrahydrothiophenes (THTs) with excellent diastereoselectivity. The present methodology has broad substrate tolerance. Gram-scale reaction proceeds with equal efficiency. Functional group transformations further highlight the synthetic potential of the THTs. An asymmetric version of the cascade reaction has also been investigated and a maximum of 72% ee was observed with cinchonidine derived squaramide. Moreover, in silico based molecular docking followed by deep learning based affinity prediction and molecular dynamics simulation analysis indicate the synthesized THT derivatives can act as potent competitive inhibitors of MptpB at low micromolar to nanomolar concentrations. In silico ADME analysis further suggests the plausibility of these compounds to act as future anti-mycobacterial therapeutic leads.
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Affiliation(s)
- Anshul Jain
- Department of Chemistry, Indian Institute of Technology Jodhpur, Rajashtan-342037, India.
| | - Sushobhan Maji
- Department of Bioscience and Bioengineering, Indian Institute of Technology Jodhpur, Rajashtan-342037, India.
| | - Khyati Shukla
- Department of Chemistry, Indian Institute of Technology Kanpur, Uttar Pradesh-208016, India
| | - Akanksha Kumari
- Department of Chemistry, Indian Institute of Technology Jodhpur, Rajashtan-342037, India.
| | - Shivani Garg
- Department of Bioscience and Bioengineering, Indian Institute of Technology Jodhpur, Rajashtan-342037, India.
| | - Ramesh K Metre
- Department of Chemistry, Indian Institute of Technology Jodhpur, Rajashtan-342037, India.
| | - Sudipta Bhattacharyya
- Department of Bioscience and Bioengineering, Indian Institute of Technology Jodhpur, Rajashtan-342037, India.
| | - Nirmal K Rana
- Department of Chemistry, Indian Institute of Technology Jodhpur, Rajashtan-342037, India.
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7
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Cazzaniga G, Mori M, Meneghetti F, Chiarelli LR, Stelitano G, Caligiuri I, Rizzolio F, Ciceri S, Poli G, Staver D, Ortore G, Tuccinardi T, Villa S. Virtual screening and crystallographic studies reveal an unexpected γ-lactone derivative active against MptpB as a potential antitubercular agent. Eur J Med Chem 2022; 234:114235. [DOI: 10.1016/j.ejmech.2022.114235] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 02/03/2022] [Accepted: 02/23/2022] [Indexed: 11/04/2022]
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Rodríguez-Silva CN, Prokopczyk IM, Dos Santos JL. The Medicinal Chemistry of Chalcones as Anti-Mycobacterium tuberculosis Agents. Mini Rev Med Chem 2022; 22:2068-2080. [DOI: 10.2174/1389557522666220214093606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 08/29/2021] [Accepted: 12/13/2021] [Indexed: 11/22/2022]
Abstract
Abstract:
Tuberculosis (TB), a highly fatal infectious disease, is caused by Mycobacterium tuberculosis (Mtb) that has inflicted mankind for several centuries. In 2019, the staggering number of new cases reached 10 million resulting in 1.2 million deaths. The emergence of multidrug-resistance-Mycobacterium tuberculosis (MDR-TB) and extensively drug-resistant-Mycobacterium tuberculosis (XDR-TB) is a global concern that requires the search for novel, effective, and safer short-term therapies. Nowadays, among the few alternatives available to treat resistant-Mtb strains, the majority have limitations, which include drug-drug interactions, long-term treatment, and chronic induced toxicities. Therefore, it is mandatory to develop new anti-Mtb agents to achieve health policy goals to mitigate the disease by 2035. Among the several bioactive anti-Mtb compounds, chalcones have been described as the privileged scaffold useful for drug design. Overall, this review explores and analyzes 37 chalcones that exhibited anti-Mtb activity described in the literature up to April 2021 with minimum inhibitory concentration (MIC90) values inferior to 20 µM and selective index superior to 10. In addition, the correlation of some properties for most active compounds was evaluated, and the main targets for these compounds were discussed.
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Affiliation(s)
- Cristhian N. Rodríguez-Silva
- Universidad Nacional de Trujillo, Facultad de Farmacia y Bioquímica, Unidad de Posgrado en Farmacia y Bioquímica, Av. Juan Pablo II s/n. 13011. Trujillo-Perú
| | - Igor Muccilo Prokopczyk
- São Paulo State University (UNESP), School of Pharmaceutical Sciences, Araraquara, 14800-903, Brazil
| | - Jean Leandro Dos Santos
- Universidad Nacional de Trujillo, Facultad de Farmacia y Bioquímica, Unidad de Posgrado en Farmacia y Bioquímica, Av. Juan Pablo II s/n. 13011. Trujillo-Perú
- São Paulo State University (UNESP), School of Pharmaceutical Sciences, Araraquara, 14800-903, Brazil
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9
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Mori M, Stelitano G, Chiarelli LR, Cazzaniga G, Gelain A, Barlocco D, Pini E, Meneghetti F, Villa S. Synthesis, Characterization, and Biological Evaluation of New Derivatives Targeting MbtI as Antitubercular Agents. Pharmaceuticals (Basel) 2021; 14:155. [PMID: 33668554 PMCID: PMC7918538 DOI: 10.3390/ph14020155] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 02/05/2021] [Accepted: 02/09/2021] [Indexed: 01/09/2023] Open
Abstract
Tuberculosis (TB) causes millions of deaths every year, ranking as one of the most dangerous infectious diseases worldwide. Because several pathogenic strains of Mycobacterium tuberculosis (Mtb) have developed resistance against most of the established anti-TB drugs, new therapeutic options are urgently needed. An attractive target for the development of new antitubercular agents is the salicylate synthase MbtI, an essential enzyme for the mycobacterial siderophore biochemical machinery, absent in human cells. A set of analogues of I and II, two of the most potent MbtI inhibitors identified to date, was synthesized, characterized, and tested to elucidate the structural requirements for achieving an efficient MbtI inhibition and a potent antitubercular activity with this class of compounds. The structure-activity relationships (SAR) here discussed evidenced the importance of the furan as part of the pharmacophore and led to the preparation of six new compounds (IV-IX), which gave us the opportunity to examine a hitherto unexplored position of the phenyl ring. Among them emerged 5-(3-cyano-5-(trifluoromethyl)phenyl)furan-2-carboxylic acid (IV), endowed with comparable inhibitory properties to the previous leads, but a better antitubercular activity, which is a key issue in MbtI inhibitor research. Therefore, compound IV offers promising prospects for future studies on the development of novel agents against mycobacterial infections.
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Affiliation(s)
- Matteo Mori
- Department of Pharmaceutical Sciences, University of Milan, Via L. Mangiagalli 25, 20133 Milano, Italy; (M.M.); (G.C.); (A.G.); (D.B.); (E.P.); (S.V.)
| | - Giovanni Stelitano
- Department of Biology and Biotechnology “Lazzaro Spallanzani”, University of Pavia, via A. Ferrata 9, 27100 Pavia, Italy; (G.S.); (L.R.C.)
| | - Laurent R. Chiarelli
- Department of Biology and Biotechnology “Lazzaro Spallanzani”, University of Pavia, via A. Ferrata 9, 27100 Pavia, Italy; (G.S.); (L.R.C.)
| | - Giulia Cazzaniga
- Department of Pharmaceutical Sciences, University of Milan, Via L. Mangiagalli 25, 20133 Milano, Italy; (M.M.); (G.C.); (A.G.); (D.B.); (E.P.); (S.V.)
| | - Arianna Gelain
- Department of Pharmaceutical Sciences, University of Milan, Via L. Mangiagalli 25, 20133 Milano, Italy; (M.M.); (G.C.); (A.G.); (D.B.); (E.P.); (S.V.)
| | - Daniela Barlocco
- Department of Pharmaceutical Sciences, University of Milan, Via L. Mangiagalli 25, 20133 Milano, Italy; (M.M.); (G.C.); (A.G.); (D.B.); (E.P.); (S.V.)
| | - Elena Pini
- Department of Pharmaceutical Sciences, University of Milan, Via L. Mangiagalli 25, 20133 Milano, Italy; (M.M.); (G.C.); (A.G.); (D.B.); (E.P.); (S.V.)
| | - Fiorella Meneghetti
- Department of Pharmaceutical Sciences, University of Milan, Via L. Mangiagalli 25, 20133 Milano, Italy; (M.M.); (G.C.); (A.G.); (D.B.); (E.P.); (S.V.)
| | - Stefania Villa
- Department of Pharmaceutical Sciences, University of Milan, Via L. Mangiagalli 25, 20133 Milano, Italy; (M.M.); (G.C.); (A.G.); (D.B.); (E.P.); (S.V.)
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10
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Wang X, Ma Q. Wzb of Vibrio vulnificus represents a new group of low-molecular-weight protein tyrosine phosphatases with a unique insertion in the W-loop. J Biol Chem 2021; 296:100280. [PMID: 33450227 PMCID: PMC7948962 DOI: 10.1016/j.jbc.2021.100280] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 12/28/2020] [Accepted: 01/08/2021] [Indexed: 12/23/2022] Open
Abstract
Protein tyrosine phosphorylation regulates the production of capsular polysaccharide, an essential virulence factor of the deadly pathogen Vibrio vulnificus. The process requires the protein tyrosine kinase Wzc and its cognate phosphatase Wzb, both of which are largely uncharacterized. Herein, we report the structures of Wzb of V. vulnificus (VvWzb) in free and ligand-bound forms. VvWzb belongs to the low-molecular-weight protein tyrosine phosphatase (LMWPTP) family. Interestingly, it contains an extra four-residue insertion in the W-loop, distinct from all known LMWPTPs. The W-loop of VvWzb protrudes from the protein body in the free structure, but undergoes significant conformational changes to fold toward the active site upon ligand binding. Deleting the four-residue insertion from the W-loop severely impaired the enzymatic activity of VvWzb, indicating its importance for optimal catalysis. However, mutating individual residues or even substituting the whole insertion with four alanine residues only modestly decreased the enzymatic activity, suggesting that the contribution of the insertion to catalysis is not determined by the sequence specificity. Furthermore, inserting the four residues into Escherichia coli Wzb at the corresponding position enhanced its activity as well, indicating that the four-residue insertion in the W-loop can act as a general activity enhancing element for other LMWPTPs. The novel W-loop type and phylogenetic analysis suggested that VvWzb and its homologs should be classified into a new group of LMWPTPs. Our study sheds new insight into the catalytic mechanism and structural diversity of the LMWPTP family and promotes the understanding of the protein tyrosine phosphorylation system in prokaryotes.
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Affiliation(s)
- Xin Wang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China; Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology, Qingdao, China; University of Chinese Academy of Sciences, Beijing, China
| | - Qingjun Ma
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China; Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology, Qingdao, China; University of Chinese Academy of Sciences, Beijing, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, China.
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11
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Ruddraraju KV, Aggarwal D, Niu C, Baker EA, Zhang RY, Wu L, Zhang ZY. Highly Potent and Selective N-Aryl Oxamic Acid-Based Inhibitors for Mycobacterium tuberculosis Protein Tyrosine Phosphatase B. J Med Chem 2020; 63:9212-9227. [PMID: 32787087 DOI: 10.1021/acs.jmedchem.0c00302] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Tuberculosis is an infectious disease caused by the bacterium Mycobacterium tuberculosis (Mtb). Mtb protein tyrosine phosphatase B (mPTPB) is a virulence factor required for Mtb survival in host macrophages. Consequently, mPTPB represents an exciting target for tuberculosis treatment. Here, we identified N-phenyl oxamic acid as a highly potent and selective monoacid-based phosphotyrosine mimetic for mPTPB inhibition. SAR studies on the initial hit, compound 4 (IC50 = 257 nM), resulted in several highly potent inhibitors with IC50 values lower than 20 nM for mPTPB. Among them, compound 4t showed a Ki of 2.7 nM for mPTPB with over 4500-fold preference over 25 mammalian PTPs. Kinetic, molecular docking, and site-directed mutagenesis analyses confirmed these compounds as active site-directed reversible inhibitors of mPTPB. These inhibitors can reverse the altered host cell immune responses induced by the bacterial phosphatase. Furthermore, the inhibitors possess molecular weights <400 Da, log D7.4 < 2.5, topological polar surface area < 75, ligand efficiency > 0.43, and good aqueous solubility and metabolic stability, thus offering excellent starting points for further therapeutic development.
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Affiliation(s)
- Kasi Viswanatharaju Ruddraraju
- Department of Medicinal Chemistry and Molecular Pharmacology, Department of Chemistry, Center for Cancer Research, and Institute for Drug Discovery, Purdue University, 720 Clinic Drive, West Lafayette, Indiana 4790, United States
| | - Devesh Aggarwal
- Department of Medicinal Chemistry and Molecular Pharmacology, Department of Chemistry, Center for Cancer Research, and Institute for Drug Discovery, Purdue University, 720 Clinic Drive, West Lafayette, Indiana 4790, United States
| | - Congwei Niu
- Department of Medicinal Chemistry and Molecular Pharmacology, Department of Chemistry, Center for Cancer Research, and Institute for Drug Discovery, Purdue University, 720 Clinic Drive, West Lafayette, Indiana 4790, United States
| | - Erica Anne Baker
- Department of Medicinal Chemistry and Molecular Pharmacology, Department of Chemistry, Center for Cancer Research, and Institute for Drug Discovery, Purdue University, 720 Clinic Drive, West Lafayette, Indiana 4790, United States
| | - Ruo-Yu Zhang
- Department of Medicinal Chemistry and Molecular Pharmacology, Department of Chemistry, Center for Cancer Research, and Institute for Drug Discovery, Purdue University, 720 Clinic Drive, West Lafayette, Indiana 4790, United States
| | - Li Wu
- Department of Medicinal Chemistry and Molecular Pharmacology, Department of Chemistry, Center for Cancer Research, and Institute for Drug Discovery, Purdue University, 720 Clinic Drive, West Lafayette, Indiana 4790, United States
| | - Zhong-Yin Zhang
- Department of Medicinal Chemistry and Molecular Pharmacology, Department of Chemistry, Center for Cancer Research, and Institute for Drug Discovery, Purdue University, 720 Clinic Drive, West Lafayette, Indiana 4790, United States
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12
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6-Hydroxy-2-methylbenzofuran-4-carboxylic Acid. MOLBANK 2020. [DOI: 10.3390/m1143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
6-Hydroxy-2-methylbenzofuran-4-carboxylic acid was synthesized in two steps, starting from 3,5-dihydroxybenzoate. The product was obtained through a direct thermal one-pot cyclization with propargyl bromide, followed by a base-catalyzed hydrolysis. Its molecular structure was elucidated by means of mono- and bidimensional NMR techniques, ESI-MS, FT-IR and single-crystal X-ray diffraction.
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13
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de Ávila MB, Bitencourt-Ferreira G, de Azevedo WF. Structural Basis for Inhibition of Enoyl-[Acyl Carrier Protein] Reductase (InhA) from Mycobacterium tuberculosis. Curr Med Chem 2020; 27:745-759. [DOI: 10.2174/0929867326666181203125229] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 07/26/2018] [Accepted: 11/14/2018] [Indexed: 12/18/2022]
Abstract
Background::
The enzyme trans-enoyl-[acyl carrier protein] reductase (InhA) is a central
protein for the development of antitubercular drugs. This enzyme is the target for the pro-drug
isoniazid, which is catalyzed by the enzyme catalase-peroxidase (KatG) to become active.
Objective::
Our goal here is to review the studies on InhA, starting with general aspects and focusing on
the recent structural studies, with emphasis on the crystallographic structures of complexes involving
InhA and inhibitors.
Method::
We start with a literature review, and then we describe recent studies on InhA crystallographic
structures. We use this structural information to depict protein-ligand interactions. We also analyze the
structural basis for inhibition of InhA. Furthermore, we describe the application of computational
methods to predict binding affinity based on the crystallographic position of the ligands.
Results::
Analysis of the structures in complex with inhibitors revealed the critical residues responsible
for the specificity against InhA. Most of the intermolecular interactions involve the hydrophobic residues
with two exceptions, the residues Ser 94 and Tyr 158. Examination of the interactions has shown
that many of the key residues for inhibitor binding were found in mutations of the InhA gene in the
isoniazid-resistant Mycobacterium tuberculosis. Computational prediction of the binding affinity for
InhA has indicated a moderate uphill relationship with experimental values.
Conclusion::
Analysis of the structures involving InhA inhibitors shows that small modifications on
these molecules could modulate their inhibition, which may be used to design novel antitubercular
drugs specific for multidrug-resistant strains.
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Affiliation(s)
- Maurício Boff de Ávila
- Laboratory of Computational Systems Biology, School of Sciences - Pontifical Catholic University of Rio, Grande do Sul (PUCRS), Av. Ipiranga, 6681, Porto Alegre-RS 90619-900, Brazil
| | - Gabriela Bitencourt-Ferreira
- Laboratory of Computational Systems Biology, School of Sciences - Pontifical Catholic University of Rio, Grande do Sul (PUCRS), Av. Ipiranga, 6681, Porto Alegre-RS 90619-900, Brazil
| | - Walter Filgueira de Azevedo
- Laboratory of Computational Systems Biology, School of Sciences - Pontifical Catholic University of Rio, Grande do Sul (PUCRS), Av. Ipiranga, 6681, Porto Alegre-RS 90619-900, Brazil
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14
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Multitargeting Compounds: A Promising Strategy to Overcome Multi-Drug Resistant Tuberculosis. Molecules 2020; 25:molecules25051239. [PMID: 32182964 PMCID: PMC7179463 DOI: 10.3390/molecules25051239] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 02/28/2020] [Accepted: 03/08/2020] [Indexed: 12/18/2022] Open
Abstract
Tuberculosis is still an urgent global health problem, mainly due to the spread of multi-drug resistant M. tuberculosis strains, which lead to the need of new more efficient drugs. A strategy to overcome the problem of the resistance insurgence could be the polypharmacology approach, to develop single molecules that act on different targets. Polypharmacology could have features that make it an approach more effective than the classical polypharmacy, in which different drugs with high affinity for one target are taken together. Firstly, for a compound that has multiple targets, the probability of development of resistance should be considerably reduced. Moreover, such compounds should have higher efficacy, and could show synergic effects. Lastly, the use of a single molecule should be conceivably associated with a lower risk of side effects, and problems of drug–drug interaction. Indeed, the multitargeting approach for the development of novel antitubercular drugs have gained great interest in recent years. This review article aims to provide an overview of the most recent and promising multitargeting antitubercular drug candidates.
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Mori M, Sammartino JC, Costantino L, Gelain A, Meneghetti F, Villa S, Chiarelli LR. An Overview on the Potential Antimycobacterial Agents Targeting Serine/Threonine Protein Kinases from Mycobacterium tuberculosis. Curr Top Med Chem 2019; 19:646-661. [PMID: 30827246 DOI: 10.2174/1568026619666190227182701] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 09/27/2018] [Accepted: 10/09/2018] [Indexed: 01/07/2023]
Abstract
Mycobacterium tuberculosis (Mtb), the causative agent of tuberculosis (TB), still remains an urgent global health issue, mainly due to the emergence of multi-drug resistant strains. Therefore, there is a pressing need to develop novel and more efficient drugs to control the disease. In this context, targeting the pathogen virulence factors, and particularly signal mechanisms, seems to be a promising approach. An important transmembrane signaling system in Mtb is represented by receptor-type Serine/ Threonine protein kinases (STPKs). Mtb has 11 different STPKs, two of them, PknA and PknB, are essential. By contrast PknG and PknH are involved in Mtb virulence and adaptation, and are fundamental for the pathogen growth in infection models. Therefore, STPKs represent a very interesting group of pharmacological targets in M. tuberculosis. In this work, the principal inhibitors of the mycobacterial STPKs will be presented and discussed. In particular, medicinal chemistry efforts have been focused on discovering new antimycobacterial compounds, targeting three of these kinases, namely PknA, PknB and PknG. Generally, the inhibitory effect on these enzymes do not correlate with a significant antimycobacterial action in whole-cell assays. However, compounds with activity in the low micromolar range have been obtained, demonstrating that targeting Mtb STPKs could be a new promising strategy for the development of drugs to treat TB infections.
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Affiliation(s)
- Matteo Mori
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, via L. Mangiagalli 25, 20133 Milano, Italy
| | - José Camilla Sammartino
- Dipartimento di Biologia e Biotecnologie "Lazzaro Spallanzani", Università degli Studi di Pavia, via Ferrata 9, 27100 Pavia, Italy
| | - Luca Costantino
- Dipartimento Scienze della Vita, Universita degli Studi di Modena e Reggio Emilia, via Campi 103, 41121 Modena, Italy
| | - Arianna Gelain
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, via L. Mangiagalli 25, 20133 Milano, Italy
| | - Fiorella Meneghetti
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, via L. Mangiagalli 25, 20133 Milano, Italy
| | - Stefania Villa
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, via L. Mangiagalli 25, 20133 Milano, Italy
| | - Laurent Roberto Chiarelli
- Dipartimento di Biologia e Biotecnologie "Lazzaro Spallanzani", Università degli Studi di Pavia, via Ferrata 9, 27100 Pavia, Italy
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16
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Chiarelli LR, Mori M, Beretta G, Gelain A, Pini E, Sammartino JC, Stelitano G, Barlocco D, Costantino L, Lapillo M, Poli G, Caligiuri I, Rizzolio F, Bellinzoni M, Tuccinardi T, Villa S, Meneghetti F. New insight into structure-activity of furan-based salicylate synthase (MbtI) inhibitors as potential antitubercular agents. J Enzyme Inhib Med Chem 2019; 34:823-828. [PMID: 30889995 PMCID: PMC6427685 DOI: 10.1080/14756366.2019.1589462] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Starting from the analysis of the hypothetical binding mode of our previous furan-based hit (I), we successfully achieved our objective to replace the nitro moiety, leading to the disclosure of a new lead exhibiting a strong activity against MbtI. Our best candidate 1 h displayed a Ki of 8.8 µM and its antimycobacterial activity (MIC99 = 250 µM) is conceivably related to mycobactin biosynthesis inhibition. These results support the hypothesis that 5-phenylfuran-2-carboxylic derivatives are a promising class of MbtI inhibitors.
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Affiliation(s)
- Laurent R Chiarelli
- a Department of Biology and Biotechnology "L Spallanzani" , University of Pavia , Pavia , Italy
| | - Matteo Mori
- b Department of Pharmaceutical Sciences , University of Milano , Milano , Italy
| | - Giangiacomo Beretta
- c Department of Environmental Science and Policy , University of Milano , Milano , Italy
| | - Arianna Gelain
- b Department of Pharmaceutical Sciences , University of Milano , Milano , Italy
| | - Elena Pini
- b Department of Pharmaceutical Sciences , University of Milano , Milano , Italy
| | - Josè Camilla Sammartino
- a Department of Biology and Biotechnology "L Spallanzani" , University of Pavia , Pavia , Italy
| | - Giovanni Stelitano
- a Department of Biology and Biotechnology "L Spallanzani" , University of Pavia , Pavia , Italy
| | - Daniela Barlocco
- b Department of Pharmaceutical Sciences , University of Milano , Milano , Italy
| | - Luca Costantino
- d Department of Life Sciences , University of Modena e Reggio Emilia , Modena , Italy
| | | | - Giulio Poli
- e Department of Pharmacy , University of Pisa , Pisa , Italy
| | - Isabella Caligiuri
- f Pathology Unit, Department of Molecular Biology and Translational Research , National Cancer Institute and Center for Molecular Biomedicine , Aviano , Italy
| | - Flavio Rizzolio
- f Pathology Unit, Department of Molecular Biology and Translational Research , National Cancer Institute and Center for Molecular Biomedicine , Aviano , Italy.,g Department of Molecular Science and Nanosystems , Ca' Foscari University of Venezia , Venezia-Mestre , Italy
| | | | | | - Stefania Villa
- b Department of Pharmaceutical Sciences , University of Milano , Milano , Italy
| | - Fiorella Meneghetti
- b Department of Pharmaceutical Sciences , University of Milano , Milano , Italy
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17
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Rossetti A, Bono N, Candiani G, Meneghetti F, Roda G, Sacchetti A. Synthesis and Antimicrobial Evaluation of Novel Chiral 2-Amino-4,5,6,7-tetrahydrothieno[2,3-c]pyridine Derivatives. Chem Biodivers 2019; 16:e1900097. [PMID: 30942951 DOI: 10.1002/cbdv.201900097] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Accepted: 04/01/2019] [Indexed: 11/06/2022]
Abstract
New N-substituted-2-amino-4,5,6,7-tetrahydrothieno[2,3-c]pyridine derivatives were synthesized employing a convenient one-pot three-component method and their structures were characterized by 1 H-NMR and single crystal X-ray diffraction analysis. All the synthesized compounds were in vitro screened for antimicrobial activity against Gram-positive (Sarcina lutea) and Gram-negative bacteria (Escherichia coli). In this work, we introduced a chiral residue on the tetrahydropyridine nitrogen, the hitherto the less investigated position on this pharmacophore in order to explore the effect. The antibacterial results showed that the synthesized compounds were active only against Gram-positive bacteria and the (R)-enantiomers displayed a greater antimicrobial potency than their (S)-counterparts. The structure-activity relationship here investigated may provide some interesting clues for future development of tetrahydrothienopyridine derivatives with higher antimicrobial activity.
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Affiliation(s)
- Arianna Rossetti
- Dipartimento di Chimica, Materiali e Ingegneria Chimica 'Giulio Natta' Politecnico di Milano, Via Mancinelli 7, 20131, Milano, Italy
| | - Nina Bono
- Research Unit Milano Politecnico, INSTM, Via Mancinelli 7, 20131, Milano, Italy
| | - Gabriele Candiani
- Dipartimento di Chimica, Materiali e Ingegneria Chimica 'Giulio Natta' Politecnico di Milano, Via Mancinelli 7, 20131, Milano, Italy.,Research Unit Milano Politecnico, INSTM, Via Mancinelli 7, 20131, Milano, Italy
| | - Fiorella Meneghetti
- Dipartimento di Scienze Farmaceutiche Università degli Studi di Milano, Via Mangiagalli 25, 20133, Milano, Italy
| | - Gabriella Roda
- Dipartimento di Scienze Farmaceutiche Università degli Studi di Milano, Via Mangiagalli 25, 20133, Milano, Italy
| | - Alessandro Sacchetti
- Dipartimento di Chimica, Materiali e Ingegneria Chimica 'Giulio Natta' Politecnico di Milano, Via Mancinelli 7, 20131, Milano, Italy.,Research Unit Milano Politecnico, INSTM, Via Mancinelli 7, 20131, Milano, Italy
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18
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Docking- and pharmacophore-based virtual screening for the identification of novel Mycobacterium tuberculosis protein tyrosine phosphatase B (MptpB) inhibitor with a thiobarbiturate scaffold. Bioorg Chem 2019; 85:229-239. [DOI: 10.1016/j.bioorg.2018.12.038] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 12/23/2018] [Accepted: 12/29/2018] [Indexed: 01/15/2023]
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19
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Truzzi E, Meneghetti F, Mori M, Costantino L, Iannuccelli V, Maretti E, Domenici F, Castellano C, Rogers S, Capocefalo A, Leo E. Drugs/lamellae interface influences the inner structure of double-loaded liposomes for inhaled anti-TB therapy: An in-depth small-angle neutron scattering investigation. J Colloid Interface Sci 2019; 541:399-406. [PMID: 30710822 DOI: 10.1016/j.jcis.2019.01.094] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 01/18/2019] [Accepted: 01/22/2019] [Indexed: 02/05/2023]
Abstract
With the aim of developing new drug carriers for inhalation therapy, we report here an in depth investigation of the structure of multilamellar liposomes loaded with two well-established anti-tubercular (anti-TB) drugs, isoniazid (INH) and rifampicin (RIF), by means of small-angle neutron-scattering (SANS) analysis. Unloaded, single drug-loaded and co-loaded liposomes were prepared using different amounts of drugs and characterized regarding size, encapsulation efficiency and drug release. Detailed information on relevant properties of the investigated host-guest structures, namely the steric bilayer thickness, particle dispersion, number of lamellae and drug localization was studied by SANS. Results showed that RIF-liposomes were less ordered than unloaded liposomes. INH induced a change in the inter-bilayer periodical spacing, while RIF-INH co-loading stabilized the multilamellar liposome architecture, as confirmed by the increment of the drug loading capacity. These findings could be useful for the understanding of in vitro and in vivo behavior of these systems and for the design of new drug carriers, intended for inhaled therapy.
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Affiliation(s)
- Eleonora Truzzi
- Dipartimento di Scienze della Vita, Università degli Studi di Modena e Reggio Emilia, via Campi 103, 41121 Modena, Italy
| | - Fiorella Meneghetti
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, Via L. Mangiagalli 25, 20133 Milano, Italy
| | - Matteo Mori
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, Via L. Mangiagalli 25, 20133 Milano, Italy
| | - Luca Costantino
- Dipartimento di Scienze della Vita, Università degli Studi di Modena e Reggio Emilia, via Campi 103, 41121 Modena, Italy
| | - Valentina Iannuccelli
- Dipartimento di Scienze della Vita, Università degli Studi di Modena e Reggio Emilia, via Campi 103, 41121 Modena, Italy
| | - Eleonora Maretti
- Dipartimento di Scienze della Vita, Università degli Studi di Modena e Reggio Emilia, via Campi 103, 41121 Modena, Italy
| | - Fabio Domenici
- Dipartimento di Scienze e Tecnologie Chimiche, Via della Ricerca Scientifica, Università degli Studi di Roma Tor Vergata, 00133 Roma, Italy.
| | - Carlo Castellano
- Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, 20133 Milano, Italy.
| | - Sarah Rogers
- ISIS-STFC, Rutherford Appleton Laboratory, Harwell Oxford, Didcot OX11 0QX, UK
| | - Angela Capocefalo
- Dipartimento di Fisica, Sapienza Università di Roma P. le Aldo Moro 5, 00185 Roma, Italy
| | - Eliana Leo
- Dipartimento di Scienze della Vita, Università degli Studi di Modena e Reggio Emilia, via Campi 103, 41121 Modena, Italy.
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20
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Surineni G, Gao Y, Hussain M, Liu Z, Lu Z, Chhotaray C, Islam MM, Hameed HMA, Zhang T. Design, synthesis, and in vitro biological evaluation of novel benzimidazole tethered allylidenehydrazinylmethylthiazole derivatives as potent inhibitors of Mycobacterium tuberculosis. MEDCHEMCOMM 2019; 10:49-60. [PMID: 30774854 PMCID: PMC6349066 DOI: 10.1039/c8md00389k] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Accepted: 10/22/2018] [Indexed: 11/21/2022]
Abstract
Tuberculosis (TB) has become one of the most significant public health problems in recent years. Antibiotic therapy remains the mainstay of TB control strategies, but the increasing resistance of mycobacterial species has heightened alarm, requiring the development of novel drugs in order to improve treatment outcomes. Here, as an effort to identify novel and effective antitubercular agents, we designed and synthesized a series of novel substituted benzimidazolallylidenehydrazinylmethylthiazole derivatives via a multi-component molecular hybridization approach with single molecular architecture. Our design strategy involved assembling the antitubercular pharmacophoric fragments benzimidazole, 2-aminothiazole and substituted α,β-unsaturated ketones via condensation reactions. All the newly synthesized compounds were fully characterized via NMR and mass spectral data and evaluated for in vitro biological activity against the H37Ra strain of Mycobacterium tuberculosis. From the biological evaluation data, we identified some effective compounds, of which 8g and 7e were the most active ones (both having MIC values of 2.5 μg mL-1). In addition, compound 8g exhibited a lower cytotoxicity profile. We conceive that compound 8g may serve as a chemical probe of interest for further lead optimization studies with the general aim of developing novel and effective antitubercular agents.
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Affiliation(s)
- Goverdhan Surineni
- State Key Laboratory of Respiratory Disease , Guangzhou Institutes of Biomedicine and Health (GIBH) , Chinese Academy of Sciences (CAS) , Guangzhou-510530 , China . ; ; Tel: (+86)20 3201 5270
- University of Chinese Academy of Sciences (UCAS) , Beijing , China
| | - Yamin Gao
- State Key Laboratory of Respiratory Disease , Guangzhou Institutes of Biomedicine and Health (GIBH) , Chinese Academy of Sciences (CAS) , Guangzhou-510530 , China . ; ; Tel: (+86)20 3201 5270
- University of Chinese Academy of Sciences (UCAS) , Beijing , China
| | - Muzammal Hussain
- State Key Laboratory of Respiratory Disease , Guangzhou Institutes of Biomedicine and Health (GIBH) , Chinese Academy of Sciences (CAS) , Guangzhou-510530 , China . ; ; Tel: (+86)20 3201 5270
- University of Chinese Academy of Sciences (UCAS) , Beijing , China
| | - Zhiyong Liu
- State Key Laboratory of Respiratory Disease , Guangzhou Institutes of Biomedicine and Health (GIBH) , Chinese Academy of Sciences (CAS) , Guangzhou-510530 , China . ; ; Tel: (+86)20 3201 5270
| | - Zhili Lu
- State Key Laboratory of Respiratory Disease , Guangzhou Institutes of Biomedicine and Health (GIBH) , Chinese Academy of Sciences (CAS) , Guangzhou-510530 , China . ; ; Tel: (+86)20 3201 5270
| | - Chiranjibi Chhotaray
- State Key Laboratory of Respiratory Disease , Guangzhou Institutes of Biomedicine and Health (GIBH) , Chinese Academy of Sciences (CAS) , Guangzhou-510530 , China . ; ; Tel: (+86)20 3201 5270
- University of Chinese Academy of Sciences (UCAS) , Beijing , China
| | - Md Mahmudul Islam
- State Key Laboratory of Respiratory Disease , Guangzhou Institutes of Biomedicine and Health (GIBH) , Chinese Academy of Sciences (CAS) , Guangzhou-510530 , China . ; ; Tel: (+86)20 3201 5270
- University of Chinese Academy of Sciences (UCAS) , Beijing , China
| | - H M Adnan Hameed
- State Key Laboratory of Respiratory Disease , Guangzhou Institutes of Biomedicine and Health (GIBH) , Chinese Academy of Sciences (CAS) , Guangzhou-510530 , China . ; ; Tel: (+86)20 3201 5270
- University of Chinese Academy of Sciences (UCAS) , Beijing , China
| | - Tianyu Zhang
- State Key Laboratory of Respiratory Disease , Guangzhou Institutes of Biomedicine and Health (GIBH) , Chinese Academy of Sciences (CAS) , Guangzhou-510530 , China . ; ; Tel: (+86)20 3201 5270
- University of Chinese Academy of Sciences (UCAS) , Beijing , China
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21
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Pini E, Poli G, Tuccinardi T, Chiarelli LR, Mori M, Gelain A, Costantino L, Villa S, Meneghetti F, Barlocco D. New Chromane-Based Derivatives as Inhibitors of Mycobacterium tuberculosis Salicylate Synthase (MbtI): Preliminary Biological Evaluation and Molecular Modeling Studies. Molecules 2018; 23:molecules23071506. [PMID: 29933627 PMCID: PMC6099841 DOI: 10.3390/molecules23071506] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Revised: 06/15/2018] [Accepted: 06/19/2018] [Indexed: 12/12/2022] Open
Abstract
Tuberculosis is the leading cause of death from a single infectious agent worldwide; therefore, the need for new antitubercular drugs is desperate. The recently validated target salicylate synthase MbtI is the first enzyme involved in the biosynthesis of mycobactins, compounds able to chelate iron, an essential cofactor for the survival of Mycobacterium tuberculosis in the host. Here, we report on the synthesis and biological evaluation of chromane-based compounds as new potential inhibitors of MbtI. Our approach successfully allowed the identification of a novel lead compound (1), endowed with a promising activity against this enzyme (IC50 = 55 μM). Molecular modeling studies were performed in order to evaluate the binding mode of 1 and rationalize the preliminary structure-activity relationships, thus providing crucial information to carry out further optimization studies.
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Affiliation(s)
- Elena Pini
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, Via L. Mangiagalli 25, 20133 Milano, Italy.
| | - Giulio Poli
- Dipartimento di Farmacia, Università di Pisa, via Bonanno 6, 56126 Pisa, Italy.
| | - Tiziano Tuccinardi
- Dipartimento di Farmacia, Università di Pisa, via Bonanno 6, 56126 Pisa, Italy.
| | - Laurent Roberto Chiarelli
- Dipartimento di Biologia e Biotecnologie "Lazzaro Spallanzani", Università degli Studi di Pavia, via Ferrata 9, 27100 Pavia, Italy.
| | - Matteo Mori
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, Via L. Mangiagalli 25, 20133 Milano, Italy.
| | - Arianna Gelain
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, Via L. Mangiagalli 25, 20133 Milano, Italy.
| | - Luca Costantino
- Dipartimento Scienze della Vita, Università degli Studi di Modena e Reggio Emilia, via Campi 103, 41121 Modena, Italy.
| | - Stefania Villa
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, Via L. Mangiagalli 25, 20133 Milano, Italy.
| | - Fiorella Meneghetti
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, Via L. Mangiagalli 25, 20133 Milano, Italy.
| | - Daniela Barlocco
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, Via L. Mangiagalli 25, 20133 Milano, Italy.
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22
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Chiarelli LR, Mori M, Barlocco D, Beretta G, Gelain A, Pini E, Porcino M, Mori G, Stelitano G, Costantino L, Lapillo M, Bonanni D, Poli G, Tuccinardi T, Villa S, Meneghetti F. Discovery and development of novel salicylate synthase (MbtI) furanic inhibitors as antitubercular agents. Eur J Med Chem 2018; 155:754-763. [PMID: 29940465 DOI: 10.1016/j.ejmech.2018.06.033] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Revised: 06/05/2018] [Accepted: 06/13/2018] [Indexed: 01/10/2023]
Abstract
We report on the virtual screening, synthesis, and biological evaluation of new furan derivatives targeting Mycobacterium tuberculosis salicylate synthase (MbtI). A receptor-based virtual screening procedure was applied to screen the Enamine database, identifying two compounds, I and III, endowed with a good enzyme inhibitory activity. Considering the most active compound I as starting point for the development of novel MbtI inhibitors, we obtained new derivatives based on the furan scaffold. Among the SAR performed on this class, compound 1a emerged as the most potent MbtI inhibitor reported to date (Ki = 5.3 μM). Moreover, compound 1a showed a promising antimycobacterial activity (MIC99 = 156 μM), which is conceivably related to mycobactin biosynthesis inhibition.
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Affiliation(s)
- Laurent R Chiarelli
- Dipartimento di Biologia e Biotecnologie "Lazzaro Spallanzani", Università degli Studi di Pavia, via Ferrata 9, 27100, Pavia, Italy
| | - Matteo Mori
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, Via L. Mangiagalli 25, 20133, Milano, Italy
| | - Daniela Barlocco
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, Via L. Mangiagalli 25, 20133, Milano, Italy
| | - Giangiacomo Beretta
- Dipartimento di Scienze e Politiche Ambientali, Università degli Studi di Milano, Via Celoria 2, 20133, Milano, Italy
| | - Arianna Gelain
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, Via L. Mangiagalli 25, 20133, Milano, Italy
| | - Elena Pini
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, Via L. Mangiagalli 25, 20133, Milano, Italy
| | - Marianna Porcino
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, Via L. Mangiagalli 25, 20133, Milano, Italy
| | - Giorgia Mori
- Dipartimento di Biologia e Biotecnologie "Lazzaro Spallanzani", Università degli Studi di Pavia, via Ferrata 9, 27100, Pavia, Italy
| | - Giovanni Stelitano
- Dipartimento di Biologia e Biotecnologie "Lazzaro Spallanzani", Università degli Studi di Pavia, via Ferrata 9, 27100, Pavia, Italy
| | - Luca Costantino
- Dipartimento Scienze della Vita, Università degli Studi di Modena e Reggio Emilia, via Campi 103, 41121, Modena, Italy
| | - Margherita Lapillo
- Dipartimento di Farmacia, Università di Pisa, via Bonanno 6, 56126, Pisa, Italy
| | - Davide Bonanni
- Dipartimento di Farmacia, Università di Pisa, via Bonanno 6, 56126, Pisa, Italy
| | - Giulio Poli
- Dipartimento di Biotecnologie, Chimica e Farmacia, Università di Siena, via A. Moro 2, 53100, Siena, Italy
| | - Tiziano Tuccinardi
- Dipartimento di Farmacia, Università di Pisa, via Bonanno 6, 56126, Pisa, Italy.
| | - Stefania Villa
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, Via L. Mangiagalli 25, 20133, Milano, Italy.
| | - Fiorella Meneghetti
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, Via L. Mangiagalli 25, 20133, Milano, Italy
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23
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Stanford SM, Bottini N. Targeting Tyrosine Phosphatases: Time to End the Stigma. Trends Pharmacol Sci 2017; 38:524-540. [PMID: 28412041 DOI: 10.1016/j.tips.2017.03.004] [Citation(s) in RCA: 124] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Revised: 01/20/2017] [Accepted: 03/08/2017] [Indexed: 12/22/2022]
Abstract
Protein tyrosine phosphatases (PTPs) are a family of enzymes essential for numerous cellular processes, and several PTPs have been validated as therapeutic targets for human diseases. Historically, the development of drugs targeting PTPs has been highly challenging, leading to stigmatization of these enzymes as undruggable targets. Despite these difficulties, efforts to drug PTPs have persisted, and recent years have seen an influx of new probes providing opportunities for biological examination of old and new PTP targets. Here we discuss progress towards drugging PTPs with special emphasis on the development of selective probes with biological activity. We describe the development of new small-molecule orthosteric, allosteric, and oligomerization-inhibiting PTP inhibitors and discuss new studies targeting the receptor PTP (RPTP) subfamily with biologics.
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Affiliation(s)
| | - Nunzio Bottini
- Department of Medicine, University of California, San Diego, La Jolla, CA, USA.
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24
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Liposomes loaded with bioactive lipids enhance antibacterial innate immunity irrespective of drug resistance. Sci Rep 2017; 7:45120. [PMID: 28345623 PMCID: PMC5366871 DOI: 10.1038/srep45120] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Accepted: 01/27/2017] [Indexed: 12/26/2022] Open
Abstract
Phagocytosis is a key mechanism of innate immunity, and promotion of phagosome maturation may represent a therapeutic target to enhance antibacterial host response. Phagosome maturation is favored by the timely and coordinated intervention of lipids and may be altered in infections. Here we used apoptotic body-like liposomes (ABL) to selectively deliver bioactive lipids to innate cells, and then tested their function in models of pathogen-inhibited and host-impaired phagosome maturation. Stimulation of macrophages with ABLs carrying phosphatidic acid (PA), phosphatidylinositol 3-phosphate (PI3P) or PI5P increased intracellular killing of BCG, by inducing phagosome acidification and ROS generation. Moreover, ABLs carrying PA or PI5P enhanced ROS-mediated intracellular killing of Pseudomonas aeruginosa, in macrophages expressing a pharmacologically-inhibited or a naturally-mutated cystic fibrosis transmembrane conductance regulator. Finally, we show that bronchoalveolar lavage cells from patients with drug-resistant pulmonary infections increased significantly their capacity to kill in vivo acquired bacterial pathogens when ex vivo stimulated with PA- or PI5P-loaded ABLs. Altogether, these results provide the proof of concept of the efficacy of bioactive lipids delivered by ABL to enhance phagosome maturation dependent antimicrobial response, as an additional host-directed strategy aimed at the control of chronic, recurrent or drug-resistant infections.
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25
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Anam F, Abbas A, Lo KM, Hameed S, Ramasami P, Umar Y, Ullah A, Naseer MM. Synthesis, crystal structure, experimental and theoretical investigations of 3-(4-ethoxy-3-methoxyphenyl)-1-phenylprop-2-en-1-one. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2016.08.022] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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26
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Sharma AK, Dhasmana N, Dubey N, Kumar N, Gangwal A, Gupta M, Singh Y. Bacterial Virulence Factors: Secreted for Survival. Indian J Microbiol 2016; 57:1-10. [PMID: 28148975 DOI: 10.1007/s12088-016-0625-1] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Accepted: 10/03/2016] [Indexed: 12/29/2022] Open
Abstract
Virulence is described as an ability of an organism to infect the host and cause a disease. Virulence factors are the molecules that assist the bacterium colonize the host at the cellular level. These factors are either secretory, membrane associated or cytosolic in nature. The cytosolic factors facilitate the bacterium to undergo quick adaptive-metabolic, physiological and morphological shifts. The membrane associated virulence factors aid the bacterium in adhesion and evasion of the host cell. The secretory factors are important components of bacterial armoury which help the bacterium wade through the innate and adaptive immune response mounted within the host. In extracellular pathogens, the secretory virulence factors act synergistically to kill the host cells. In this review, we revisit the role of some of the secreted virulence factors of two human pathogens: Mycobacterium tuberculosis-an intracellular pathogen and Bacillus anthracis-an extracellular pathogen. The advances in research on the role of secretory factors of these pathogens during infection are discussed.
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Affiliation(s)
- Aditya Kumar Sharma
- CSIR-Institute of Genomics and Integrative Biology, Mall Road, Delhi, 110007 India.,Academy of Scientific and Innovative Research (AcSIR), 2, Rafi Marg, Anusandhan Bhawan, New Delhi, 110001 India
| | - Neha Dhasmana
- CSIR-Institute of Genomics and Integrative Biology, Mall Road, Delhi, 110007 India.,Academy of Scientific and Innovative Research (AcSIR), 2, Rafi Marg, Anusandhan Bhawan, New Delhi, 110001 India
| | - Neha Dubey
- Department of Zoology, University of Delhi, Delhi, 110007 India
| | - Nishant Kumar
- CSIR-Institute of Genomics and Integrative Biology, Mall Road, Delhi, 110007 India.,Academy of Scientific and Innovative Research (AcSIR), 2, Rafi Marg, Anusandhan Bhawan, New Delhi, 110001 India
| | - Aakriti Gangwal
- CSIR-Institute of Genomics and Integrative Biology, Mall Road, Delhi, 110007 India
| | - Meetu Gupta
- CSIR-Institute of Genomics and Integrative Biology, Mall Road, Delhi, 110007 India
| | - Yogendra Singh
- CSIR-Institute of Genomics and Integrative Biology, Mall Road, Delhi, 110007 India.,Department of Zoology, University of Delhi, Delhi, 110007 India
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27
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Kucerova-Chlupacova M, Vyskovska-Tyllova V, Richterova-Finkova L, Kunes J, Buchta V, Vejsova M, Paterova P, Semelkova L, Jandourek O, Opletalova V. Novel Halogenated Pyrazine-Based Chalcones as Potential Antimicrobial Drugs. Molecules 2016; 21:molecules21111421. [PMID: 27801810 PMCID: PMC6273737 DOI: 10.3390/molecules21111421] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Revised: 10/14/2016] [Accepted: 10/14/2016] [Indexed: 12/04/2022] Open
Abstract
Chalcones, i.e., compounds with the chemical pattern of 1,3-diphenylprop-2-en-1-ones, exert a wide range of bio-activities, e.g., antioxidant, anti-inflammatory, anticancer, anti-infective etc. Our research group has been focused on pyrazine analogues of chalcones; several series have been synthesized and tested in vitro on antifungal and antimycobacterial activity. The highest potency was exhibited by derivatives with electron withdrawing groups (EWG) in positions 2 and 4 of the ring B. As halogens also have electron withdrawing properties, novel halogenated derivatives were prepared by Claisen-Schmidt condensation. All compounds were submitted for evaluation of their antifungal and antibacterial activity, including their antimycobacterial effect. In the antifungal assay against eight strains of selected fungi, growth inhibition of Candida glabrata and Trichophyton interdigitale (formerly T. mentagrophytes) was shown by non-alkylated derivatives with 2-bromo or 2-chloro substitution. In the panel of selected bacteria, 2-chloro derivatives showed the highest inhibitory effect on Staphylococcus sp. In addition, all products were also screened for their antimycobacterial activity against Mycobacterium tuberculosis H37RV My 331/88, M. kansasii My 235/80, M. avium 152/80 and M. smegmatis CCM 4622. Some of the examined compounds, inhibited growth of M. kansasii and M. smegmatis with minimum inhibitory concentrations (MICs) comparable with those of isoniazid.
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Affiliation(s)
- Marta Kucerova-Chlupacova
- Department of Pharmaceutical Chemistry and Pharmaceutical Analysis, Faculty of Pharmacy in Hradec Kralove, Charles University in Prague, Heyrovskeho 1203, 500 05 Hradec Kralove, Czech Republic.
| | - Veronika Vyskovska-Tyllova
- Department of Pharmaceutical Chemistry and Pharmaceutical Analysis, Faculty of Pharmacy in Hradec Kralove, Charles University in Prague, Heyrovskeho 1203, 500 05 Hradec Kralove, Czech Republic.
| | - Lenka Richterova-Finkova
- Department of Pharmaceutical Chemistry and Pharmaceutical Analysis, Faculty of Pharmacy in Hradec Kralove, Charles University in Prague, Heyrovskeho 1203, 500 05 Hradec Kralove, Czech Republic.
| | - Jiri Kunes
- Department of Inorganic and Organic Chemistry, Faculty of Pharmacy in Hradec Kralove, Charles University in Prague, Heyrovskeho 1203, 500 05 Hradec Kralove, Czech Republic.
| | - Vladimir Buchta
- Department of Biological and Medical Sciences, Faculty of Pharmacy in Hradec Kralove, Charles University in Prague, Heyrovskeho 1203, 500 05 Hradec Kralove, Czech Republic.
- Department of Clinical Microbiology, University Hospital Hradec Kralove, Sokolska 581, 500 05 Hradec Kralove, Czech Republic.
| | - Marcela Vejsova
- Department of Biological and Medical Sciences, Faculty of Pharmacy in Hradec Kralove, Charles University in Prague, Heyrovskeho 1203, 500 05 Hradec Kralove, Czech Republic.
- Department of Clinical Microbiology, University Hospital Hradec Kralove, Sokolska 581, 500 05 Hradec Kralove, Czech Republic.
| | - Pavla Paterova
- Department of Biological and Medical Sciences, Faculty of Pharmacy in Hradec Kralove, Charles University in Prague, Heyrovskeho 1203, 500 05 Hradec Kralove, Czech Republic.
- Department of Clinical Microbiology, University Hospital Hradec Kralove, Sokolska 581, 500 05 Hradec Kralove, Czech Republic.
| | - Lucia Semelkova
- Department of Pharmaceutical Chemistry and Pharmaceutical Analysis, Faculty of Pharmacy in Hradec Kralove, Charles University in Prague, Heyrovskeho 1203, 500 05 Hradec Kralove, Czech Republic.
| | - Ondrej Jandourek
- Department of Pharmaceutical Chemistry and Pharmaceutical Analysis, Faculty of Pharmacy in Hradec Kralove, Charles University in Prague, Heyrovskeho 1203, 500 05 Hradec Kralove, Czech Republic.
| | - Veronika Opletalova
- Department of Pharmaceutical Chemistry and Pharmaceutical Analysis, Faculty of Pharmacy in Hradec Kralove, Charles University in Prague, Heyrovskeho 1203, 500 05 Hradec Kralove, Czech Republic.
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28
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Abbas A, Gökce H, Bahceli S, Bolte M, Naseer MM. Solid state structural and theoretical investigations of a biologically active chalcone. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2016.02.023] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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