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Bendi A, Taruna, Rajni, Kataria S, Singh L, Kennedy JF, Supuran CT, Raghav N. Chemistry of heterocycles as carbonic anhydrase inhibitors: A pathway to novel research in medicinal chemistry review. Arch Pharm (Weinheim) 2024; 357:e2400073. [PMID: 38683875 DOI: 10.1002/ardp.202400073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 03/12/2024] [Accepted: 03/14/2024] [Indexed: 05/02/2024]
Abstract
Nowadays, the scientific community has focused on dealing with different kinds of diseases by exploring the chemistry of various heterocycles as novel drugs. In this connection, medicinal chemists identified carbonic anhydrases (CA) as one of the biologically active targets for curing various diseases. The widespread distribution of these enzymes and the high degree of homology shared by the different isoforms offer substantial challenges to discovering potential drugs. Medicinal and synthetic organic chemists have been continuously involved in developing CA inhibitors. This review explored the chemistry of different heterocycles as CA inhibitors using the last 11 years of published research work. It provides a pathway for young researchers to further explore the chemistry of a variety of synthetic as well as natural heterocycles as CA inhibitors.
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Affiliation(s)
- Anjaneyulu Bendi
- Department of Chemistry, Presidency University, Bengaluru, Karnataka, India
| | - Taruna
- Department of Chemistry, Faculty of Science, SGT University, Gurugram, Haryana, India
| | - Rajni
- Department of Chemistry, Faculty of Science, SGT University, Gurugram, Haryana, India
| | - Sweety Kataria
- Department of Chemistry, Faculty of Science, SGT University, Gurugram, Haryana, India
| | - Lakhwinder Singh
- Department of Chemistry, Faculty of Science, SGT University, Gurugram, Haryana, India
| | | | - Claudiu T Supuran
- Neurofarba Department, Pharmaceutical and Neutraceutical Section, University of Florence, Florence, Italy
| | - Neera Raghav
- Department of Chemistry, Kurukshetra University, Kurukshetra, Haryana, India
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Swain B, Marde VS, Singh P, Angeli A, Khan A, Yaddanapudi VM, Ullah Q, Supuran CT, Arifuddin M. Design, synthesis, and biological evaluation of 3-benzenesulfonamide-linked 3-hydrazinoisatin derivatives as carbonic anhydrase inhibitors. Arch Pharm (Weinheim) 2024; 357:e2300718. [PMID: 38466120 DOI: 10.1002/ardp.202300718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 02/09/2024] [Accepted: 02/19/2024] [Indexed: 03/12/2024]
Abstract
A new series of isatin-linked benzenesulfonamide derivatives (9a-w) were synthesized using the tail approach and assayed for their inhibitory potency against four different human carbonic anhydrase (hCA) isoforms, hCA I, II, IX, and XII. Most of these synthesized compounds exhibited interesting inhibition potency against isoforms hCA I, IX, and XII in the nanomolar range and by taking the standard drug acetazolamide. The most potent compounds in the case of hCA I were 9c (435.8 nM) and 9s (956.4 nM), for hCA IX, 9a (60.5 nM), 9d (95.6 nM), 9g (92.1 nM), and 9k (75.4 nM), and for hCA XII, 9p (84.5 nM). However, these compounds showed more selectivity toward hCA IX over hCA I, II, and XII. Thus, these compounds can be further developed as potential lead molecules for the development of isoform-selective hCA IX inhibitors with further structural modifications.
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Affiliation(s)
- Baijayantimala Swain
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, Telangana, India
| | - Vaibhav S Marde
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, Telangana, India
| | - Priti Singh
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, Telangana, India
| | - Andrea Angeli
- Neurofarba Department, Sezione di ScienzeFarmaceutiche e Nutraceutiche, UniversitàdegliStudi di Firenze, Florence, Italy
| | - Abrar Khan
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, Telangana, India
| | - Venkata M Yaddanapudi
- Process Chemistry Process Technology, Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, Telangana, India
| | - Qasim Ullah
- Physical Sciences Section, School of Sciences, Maulana Azad National Urdu University (MANUU), Hyderabad, Telangana, India
| | - Claudiu T Supuran
- Neurofarba Department, Sezione di ScienzeFarmaceutiche e Nutraceutiche, UniversitàdegliStudi di Firenze, Florence, Italy
| | - Mohammed Arifuddin
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, Telangana, India
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Chander, Monika, Sharma PK, Ram S. Recent advances in triazole-benzenesulfonamide hybrids and their biological activities. Med Chem Res 2023. [DOI: 10.1007/s00044-023-03052-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
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Singh P, Sridhar Goud N, Swain B, Kumar Sahoo S, Choli A, Angeli A, Singh Kushwah B, Madhavi Yaddanapudi V, Supuran CT, Arifuddin M. Synthesis of a new series of quinoline/pyridine indole-3-sulfonamide hybrids as selective carbonic anhydrase IX inhibitors. Bioorg Med Chem Lett 2022; 70:128809. [PMID: 35605838 DOI: 10.1016/j.bmcl.2022.128809] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 05/06/2022] [Accepted: 05/17/2022] [Indexed: 11/28/2022]
Abstract
In this manuscript, design, rational, synthesisand carbonic anhydrases (CAs) inhibitory profile of the quinoline/pyridine linked indole-3-sulfonamide derivatives were reported. The library of 29newly quinoline/pyridine indole-3-sulfonamide derivatives have been generated and examined against the panel of four physiological relevant human CA isoforms, namely, the cytosolic isoforms hCA I and hCA II and the transmembrane tumor associated isoforms hCA IX and hCA XII. Pyridine indole-3-sulfonamide hybrids are selective inhibit transmembrane tumor associated isoforms hCA IX and hCA XII. However, all synthesized quinoline indole-3-sulfonamide hybrids have inhibitory effect on hCA IX isoforms, whereas few have shown inhibitory activity against hCA II and hCA XII as well. However, among all synthesized compound 6q and6p having good inhibitory activity against hCA IX with Ki 1.47 µM and 1.57 µM respectively.These quinoline/pyridine indole-3-sulfonamide conjugatesmay be regarded as potential leads for hCA IXselective inhibitors as anti-cancer agents.
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Affiliation(s)
- Priti Singh
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad 500037, India
| | - Nerella Sridhar Goud
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad 500037, India; Department of Neuroimaging and Interventional Radiology (NIIIR) National Institute of Mental Health and Neuro Sciences (NIMHANS), Bengaluru 560027, India
| | - Baijayantimala Swain
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad 500037, India
| | - Santosh Kumar Sahoo
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad 500037, India
| | - Abhishek Choli
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad 500037, India
| | - Andrea Angeli
- Università degl iStudi di Firenze, Neurofarba Dept., Sezione di ScienzeFarmaceutiche e Nutraceutiche, Via Ugo Schiff 6, 50019 Sesto Fiorentino, Florence, Italy
| | - Bhoopendra Singh Kushwah
- Department of Pharmaceurical Analysis, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad 500037, India
| | - Venkata Madhavi Yaddanapudi
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad 500037, India.
| | - Claudiu T Supuran
- Università degl iStudi di Firenze, Neurofarba Dept., Sezione di ScienzeFarmaceutiche e Nutraceutiche, Via Ugo Schiff 6, 50019 Sesto Fiorentino, Florence, Italy.
| | - Mohammed Arifuddin
- Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad 500037, India.
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El Mahmoudi A, El Masaoudi H, Tachallait H, Talha A, Arshad S, Benhida R, Jaber B, Benaissa M, Bougrin K. Selective silver (I)-catalyzed four-component gram-scale synthesis of novel 1,4-disubstituted 1,2,3-triazole-sulfonamides under heterogeneous catalysis and microwave irradiation in water. RESULTS IN CHEMISTRY 2022. [DOI: 10.1016/j.rechem.2022.100552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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Fuentes-Aguilar A, Merino-Montiel P, Montiel-Smith S, Meza-Reyes S, Vega-Báez JL, Puerta A, Fernandes MX, Padrón JM, Petreni A, Nocentini A, Supuran CT, López Ó, Fernández-Bolaños JG. 2-Aminobenzoxazole-appended coumarins as potent and selective inhibitors of tumour-associated carbonic anhydrases. J Enzyme Inhib Med Chem 2021; 37:168-177. [PMID: 34894971 PMCID: PMC8667885 DOI: 10.1080/14756366.2021.1998026] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
We have carried out the design, synthesis, and evaluation of a small library of 2-aminobenzoxazole-appended coumarins as novel inhibitors of tumour-related CAs IX and XII. Substituents on C-3 and/or C-4 positions of the coumarin scaffold, and on the benzoxazole moiety, together with the length of the linker connecting both units were modified to obtain useful structure-activity relationships. CA inhibition studies revealed a good selectivity towards tumour-associated CAs IX and XII (Ki within the mid-nanomolar range in most of the cases) in comparison with CAs I, II, IV, and VII (Ki > 10 µM); CA IX was found to be slightly more sensitive towards structural changes. Docking calculations suggested that the coumarin scaffold might act as a prodrug, binding to the CAs in its hydrolysed form, which is in turn obtained due to the esterase activity of CAs. An increase of the tether length and of the substituents steric hindrance was found to be detrimental to in vitro antiproliferative activities. Incorporation of a chlorine atom on C-3 of the coumarin moiety achieved the strongest antiproliferative agent, with activities within the low micromolar range for the panel of tumour cell lines tested.
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Affiliation(s)
- Alma Fuentes-Aguilar
- Facultad de Ciencias Químicas, Ciudad Universitaria, Benemérita Universidad Autónoma de Puebla, Puebla, México
| | - Penélope Merino-Montiel
- Facultad de Ciencias Químicas, Ciudad Universitaria, Benemérita Universidad Autónoma de Puebla, Puebla, México
| | - Sara Montiel-Smith
- Facultad de Ciencias Químicas, Ciudad Universitaria, Benemérita Universidad Autónoma de Puebla, Puebla, México
| | - Socorro Meza-Reyes
- Facultad de Ciencias Químicas, Ciudad Universitaria, Benemérita Universidad Autónoma de Puebla, Puebla, México
| | - José Luis Vega-Báez
- Facultad de Ciencias Químicas, Ciudad Universitaria, Benemérita Universidad Autónoma de Puebla, Puebla, México
| | - Adrián Puerta
- BioLab, Instituto Universitario de Bio-Orgánica "Antonio González" (IUBO-AG), Universidad de La Laguna, La Laguna, Spain
| | - Miguel X Fernandes
- BioLab, Instituto Universitario de Bio-Orgánica "Antonio González" (IUBO-AG), Universidad de La Laguna, La Laguna, Spain
| | - José M Padrón
- BioLab, Instituto Universitario de Bio-Orgánica "Antonio González" (IUBO-AG), Universidad de La Laguna, La Laguna, Spain
| | - Andrea Petreni
- NEUROFARBA Department, Sezione di Scienze Farmaceutiche e Nutraceutiche, University of Florence, Florence, Italy
| | - Alessio Nocentini
- NEUROFARBA Department, Sezione di Scienze Farmaceutiche e Nutraceutiche, University of Florence, Florence, Italy
| | - Claudiu T Supuran
- NEUROFARBA Department, Sezione di Scienze Farmaceutiche e Nutraceutiche, University of Florence, Florence, Italy
| | - Óscar López
- Departamento de Química Orgánica, Facultad de Química, Universidad de Sevilla, Seville, Spain
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Singh P, Choli A, Swain B, Angeli A, Sahoo SK, Yaddanapudi VM, Supuran CT, Arifuddin M. Design and development of novel series of indole-3-sulfonamide ureido derivatives as selective carbonic anhydrase II inhibitors. Arch Pharm (Weinheim) 2021; 355:e2100333. [PMID: 34694638 DOI: 10.1002/ardp.202100333] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 10/10/2021] [Accepted: 10/12/2021] [Indexed: 02/05/2023]
Abstract
Indole is a privileged moiety with a wide range of bioactivities, making it a popular scaffold in drug design and development studies as well as in synthetic chemistry. Here, novel urea derivatives of indole, containing sulfonamide at position-3 of indole, were synthesized using a well-known tail approach, as carbonic anhydrases (CAs; EC 4.2.1.1) inhibitors. All the newly synthesized molecules were screened for their CA-inhibitory activity against four clinically relevant isoforms of human-origin carbonic anhydrase (hCA), that is, hCA I, hCA II, hCA IX, and hCA XII. These compounds were specifically active against hCA II, more than against hCA I, hCA IX, and hCA XII. Derivative 6l was found to be most active, with a Ki value of 7.7 µM against hCA II.
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Affiliation(s)
- Priti Singh
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India
| | - Abhishek Choli
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India
| | - Baijayantimala Swain
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India
| | - Andrea Angeli
- Neurofarba Department, Sezione di ScienzeFarmaceutiche e Nutraceutiche, Fiorentino, Università degl iStudi di Firenze, Florence, Italy
| | - Santosh K Sahoo
- Process Chemistry Process Technology, Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India
| | - Venkata M Yaddanapudi
- Process Chemistry Process Technology, Department of Chemical Sciences, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India
| | - Claudiu T Supuran
- Neurofarba Department, Sezione di ScienzeFarmaceutiche e Nutraceutiche, Fiorentino, Università degl iStudi di Firenze, Florence, Italy
| | - Mohammed Arifuddin
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India
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Synthesis, Crystal Structure, Inhibitory Activity and Molecular Docking of Coumarins/Sulfonamides Containing Triazolyl Pyridine Moiety as Potent Selective Carbonic Anhydrase IX and XII Inhibitors. CRYSTALS 2021. [DOI: 10.3390/cryst11091076] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
In this work, two classes of Carbonic Anhydrase (CA) inhibitors, sulfonamide and coumarin derivatives linked to pyta moiety (2a-b) and their corresponding rhenium complexes (3a-b), were designed. These compounds were synthesized and fully characterized by classical analytical methods and X-ray diffraction. All the synthesized compounds were evaluated for their inhibitory activity against the hCA isoforms I, II, IX and XII. They exhibited high inhibitory activities in the range of nanomolar for both hCA IX and hCA XII isoforms. The sulfonamide compound 2a showed the strongest inhibition against the tumour-associated hCA IX isoform with a Ki of 11.7 nM. The tumour-associated isoforms hCA IX and hCA XII were selectively inhibited by all the coumarin derivatives, with inhibition constants ranging from 12.7 nM (2b) to 44.5 nM (3b), while the hCA I and II isoforms were slightly inhibited (in the micromolar range), as expected. In terms of selectivity, compared to previously published rhenium complex-based CA inhibitors, complex 3b showed one of the highest selectivities against hCA IX and hCA XII compared to the off-target isoforms hCA I and hCA II, making it a potential anti-cancer drug candidate. Molecular docking calculations were performed to investigate the inhibition profiles of the investigated compounds at the tumour-associated hCA IX active site and to rationalize our results.
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Swain B, Abhay, Singh P, Angeli A, Aashritha K, Nagesh N, Supuran CT, Arifuddin M. 3-Functionalised benzenesulphonamide based 1,3,4-oxadiazoles as selective carbonic anhydrase XIII inhibitors: Design, synthesis and biological evaluation. Bioorg Med Chem Lett 2021; 37:127856. [PMID: 33609663 DOI: 10.1016/j.bmcl.2021.127856] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 01/27/2021] [Accepted: 02/05/2021] [Indexed: 10/22/2022]
Abstract
A new series of benzenesulphonamide linked-1,3,4-oxadiazole hybrids (6a-s) has been synthesized and tested for their carbonic anhydrase inhibition against human (h) carbonic anhydrase (CA) isoforms hCA I, II, IX, and XIII. Fluorescence properties of some of the synthesized molecules were studied. Most of the molecules exhibited significant inhibitory power, comparable or better than the standard drug acetazolamide (AAZ) on hCA XIII. Out of 19 tested molecules, compound 6e (75.8 nM) was 3 times more potent than AAZ (250.0 nM) against hCA I, whereas compound 6e (15.4 nM), 6g (16.2 nM), 6h (16.4 nM) and 6i (17.0 nM) were found to be more potent than AAZ (17.0 nM) against isoform hCA XIII. It is anticipated that these compounds could be taken as the potential leads for the development of selective hCA XIII isoform inhibitors with improved potency.
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Affiliation(s)
- Baijayantimala Swain
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad 500037, India
| | - Abhay
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad 500037, India
| | - Priti Singh
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad 500037, India
| | - Andrea Angeli
- Università degli Studi di Firenze, Neurofarba Dept., Sezione di Scienze Farmaceutiche e Nutraceutiche, Via Ugo Schiff 6, 50019 Sesto Fiorentino, Florence, Italy
| | - Kamtam Aashritha
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad 500037, India
| | - Narayana Nagesh
- Centre for Cellular and Molecular Biology (CCMB), Hyderabad, India
| | - Claudiu T Supuran
- Università degli Studi di Firenze, Neurofarba Dept., Sezione di Scienze Farmaceutiche e Nutraceutiche, Via Ugo Schiff 6, 50019 Sesto Fiorentino, Florence, Italy.
| | - Mohammed Arifuddin
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad 500037, India; Department of Chemistry, Anwarul Uloom College, 11-3-918, New Malleypally, Hyderabad 500001, T.S., India.
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Catalano M, Oehler S, Prati L, Favalli N, Bassi G, Scheuermann J, Neri D. Complexation with a Cognate Antibody Fragment Facilitates Affinity Measurements of Fluorescein-Linked Small Molecule Ligands. Anal Chem 2020; 92:10822-10829. [DOI: 10.1021/acs.analchem.0c02304] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Marco Catalano
- Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology (ETH Zürich), Vladimir-Prelog-Weg 4, CH-8093 Zurich, Switzerland
| | - Sebastian Oehler
- Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology (ETH Zürich), Vladimir-Prelog-Weg 4, CH-8093 Zurich, Switzerland
| | - Luca Prati
- Philochem AG, Libernstrasse 3, 8112 Otelfingen, Switzerland
| | - Nicholas Favalli
- Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology (ETH Zürich), Vladimir-Prelog-Weg 4, CH-8093 Zurich, Switzerland
| | - Gabriele Bassi
- Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology (ETH Zürich), Vladimir-Prelog-Weg 4, CH-8093 Zurich, Switzerland
| | - Jörg Scheuermann
- Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology (ETH Zürich), Vladimir-Prelog-Weg 4, CH-8093 Zurich, Switzerland
| | - Dario Neri
- Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology (ETH Zürich), Vladimir-Prelog-Weg 4, CH-8093 Zurich, Switzerland
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Thacker PS, Angeli A, Argulwar OS, Tiwari PL, Arifuddin M, Supuran CT. Design, synthesis and biological evaluation of coumarin linked 1,2,4-oxadiazoles as selective carbonic anhydrase IX and XII inhibitors. Bioorg Chem 2020; 98:103739. [PMID: 32193032 DOI: 10.1016/j.bioorg.2020.103739] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 03/02/2020] [Accepted: 03/07/2020] [Indexed: 12/27/2022]
Abstract
A series of coumarin linked 1,2,4-oxadiazoles were synthesized and the synthesized compounds were subjected for evaluation against the four physiologically and pharmacologically relevant hCA isoforms, hCA I, II, IX and XII. Upon evaluation of the results, it was inferred that the coumarin linked 1,2,4-oxadiazoles showed selective hCA IX and XII inhibition (low to medium nanomolar range) over hCA I and II (>10000 nM). The inhibition constants ranged from low nanomolar to moderately nanomolar. Compounds 6o, 6a, 6q and 6c elicited hCA XII inhibition, with Ki values lower than that of the standard, Acetazolamide (AAZ) with compound 6o exhibiting a Ki value of 1 nM., against hCA IX, the compound 6c exhibited the most potent inhibition with a Ki value of 23.6 nM. Hence, compound 6o can be taken as an effective lead compound for the development of hCA XII inhibitors and compound 6c can be taken as a lead compound for the development of dual hCA IX and XII inhibitors. To understand the molecular interactions, the two most potent compounds 6a and 6o were docked within the hCA XII catalytic cleft in order to study their binding modes with that isoform.
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Affiliation(s)
- Pavitra S Thacker
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad 500037, India
| | - Andrea Angeli
- Università degli Studi di Firenze, Neurofarba Dept., Sezione di Scienze Farmaceutiche e Nutraceutiche, Via Ugo Schiff 6, 50019 Sesto Fiorentino, Florence, Italy
| | - Omkar S Argulwar
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad 500037, India
| | - Prerna L Tiwari
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad 500037, India
| | - Mohammed Arifuddin
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad 500037, India.
| | - Claudiu T Supuran
- Università degli Studi di Firenze, Neurofarba Dept., Sezione di Scienze Farmaceutiche e Nutraceutiche, Via Ugo Schiff 6, 50019 Sesto Fiorentino, Florence, Italy.
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