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Rossi S, Tudino V, Carullo G, Butini S, Campiani G, Gemma S. Metalloenzyme Inhibitors against Zoonotic Infections: Focus on Leishmania and Schistosoma. ACS Infect Dis 2024; 10:1520-1535. [PMID: 38669567 DOI: 10.1021/acsinfecdis.4c00163] [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] [Indexed: 04/28/2024]
Abstract
The term "zoonosis" denotes diseases transmissible among vertebrate animals and humans. These diseases constitute a significant public health challenge, comprising 61% of human pathogens and causing an estimated 2.7 million deaths annually. Zoonoses not only affect human health but also impact animal welfare and economic stability, particularly in low- and middle-income nations. Leishmaniasis and schistosomiasis are two important neglected tropical diseases with a high prevalence in tropical and subtropical areas, imposing significant burdens on affected regions. Schistosomiasis, particularly rampant in sub-Saharan Africa, lacks alternative treatments to praziquantel, prompting concerns regarding parasite resistance. Similarly, leishmaniasis poses challenges with unsatisfactory treatments, urging the development of novel therapeutic strategies. Effective prevention demands a One Health approach, integrating diverse disciplines to enhance diagnostics and develop safer drugs. Metalloenzymes, involved in parasite biology and critical in different biological pathways, emerged in the last few years as useful drug targets for the treatment of human diseases. Herein we have reviewed recent reports on the discovery of inhibitors of metalloenzymes associated with zoonotic diseases like histone deacetylases (HDACs), carbonic anhydrase (CA), arginase, and heme-dependent enzymes.
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Affiliation(s)
- Sara Rossi
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, 53100 Siena, Italy
| | - Valeria Tudino
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, 53100 Siena, Italy
| | - Gabriele Carullo
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, 53100 Siena, Italy
| | - Stefania Butini
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, 53100 Siena, Italy
| | - Giuseppe Campiani
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, 53100 Siena, Italy
- Bioinformatics Research Center, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan 81746-7346, Iran
| | - Sandra Gemma
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, 53100 Siena, Italy
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2
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Al-Matarneh CM, Pinteala M, Nicolescu A, Silion M, Mocci F, Puf R, Angeli A, Ferraroni M, Supuran CT, Zara S, Carradori S, Paoletti N, Bonardi A, Gratteri P. Synthetic Approaches to Novel Human Carbonic Anhydrase Isoform Inhibitors Based on Pyrrol-2-one Moiety. J Med Chem 2024; 67:3018-3038. [PMID: 38301036 PMCID: PMC10895679 DOI: 10.1021/acs.jmedchem.3c02190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 01/10/2024] [Accepted: 01/11/2024] [Indexed: 02/03/2024]
Abstract
New dihydro-pyrrol-2-one compounds, featuring dual sulfonamide groups, were synthesized through a one-pot, three-component approach utilizing trifluoroacetic acid as a catalyst. Computational analysis using density functional theory (DFT) and condensed Fukui function explored the structure-reactivity relationship. Evaluation against human carbonic anhydrase isoforms (hCA I, II, IX, XII) revealed potent inhibition. The widely expressed cytosolic hCA I was inhibited across a range of concentrations (KI 3.9-870.9 nM). hCA II, also cytosolic, exhibited good inhibition as well. Notably, all compounds effectively inhibited tumor-associated hCA IX (KI 1.9-211.2 nM) and hCA XII (low nanomolar). Biological assessments on MCF7 cancer cells highlighted the compounds' ability, in conjunction with doxorubicin, to significantly impact tumor cell viability. These findings underscore the potential therapeutic relevance of the synthesized compounds in cancer treatment.
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Affiliation(s)
- Cristina M. Al-Matarneh
- Center
of Advanced Research in Bionanoconjugates and Biopolymers, “Petru Poni” Institute of Macromolecular
Chemistry of Romanian Academy, 41A Grigore Ghica Voda Alley, Iasi 700487, Romania
- Research
Institute of the University of Bucharest-ICUB, 90 Sos. Panduri, 050663 Bucharest, Romania
| | - Mariana Pinteala
- Center
of Advanced Research in Bionanoconjugates and Biopolymers, “Petru Poni” Institute of Macromolecular
Chemistry of Romanian Academy, 41A Grigore Ghica Voda Alley, Iasi 700487, Romania
| | - Alina Nicolescu
- NMR
Laboratory ”Petru Poni” Institute of Macromolecular
Chemistry of Romanian Academy, 41A Grigore Ghica Voda Alley, Iasi 700487, Romania
| | - Mihaela Silion
- Physics
of Polymers and Polymeric Materials Department, “Petru Poni” Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Francesca Mocci
- Department
of Chemical and Geological Sciences, University
of Cagliari, 09124 Cagliari, Italy
| | - Razvan Puf
- Center
of Advanced Research in Bionanoconjugates and Biopolymers, “Petru Poni” Institute of Macromolecular
Chemistry of Romanian Academy, 41A Grigore Ghica Voda Alley, Iasi 700487, Romania
| | - Andrea Angeli
- Sezione di
Scienze Farmaceutiche, NeuroFarba Department, Universita degli Studi di Firenze, Via Ugo Schiff 6, 50019 Sesto Fiorentino, Italy
| | - Marta Ferraroni
- Dipartimento
di Chimica “Ugo Schiff”, University
of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, Florence Italy
| | - Claudiu T. Supuran
- Sezione di
Scienze Farmaceutiche, NeuroFarba Department, Universita degli Studi di Firenze, Via Ugo Schiff 6, 50019 Sesto Fiorentino, Italy
| | - Susi Zara
- Department
of Pharmacy, “G. d’Annunzio”
University of Chieti-Pescara, via dei Vestini 31, 66100 Chieti, Italy
| | - Simone Carradori
- Department
of Pharmacy, “G. d’Annunzio”
University of Chieti-Pescara, via dei Vestini 31, 66100 Chieti, Italy
| | - Niccolò Paoletti
- Department
of Chemical and Geological Sciences, University
of Cagliari, 09124 Cagliari, Italy
- Sezione di
Scienze Farmaceutiche, NeuroFarba Department, Universita degli Studi di Firenze, Via Ugo Schiff 6, 50019 Sesto Fiorentino, Italy
| | - Alessandro Bonardi
- Sezione di
Scienze Farmaceutiche, NeuroFarba Department, Universita degli Studi di Firenze, Via Ugo Schiff 6, 50019 Sesto Fiorentino, Italy
- NEUROFARBA
Department, Pharmaceutical and Nutraceutical Section, Laboratory of
Molecular Modeling Cheminformatics & QSAR, University of Florence, Via U. Schiff 6, 50019 Sesto Fiorentino, Firenze Italy
| | - Paola Gratteri
- NEUROFARBA
Department, Pharmaceutical and Nutraceutical Section, Laboratory of
Molecular Modeling Cheminformatics & QSAR, University of Florence, Via U. Schiff 6, 50019 Sesto Fiorentino, Firenze Italy
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3
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Anwar FS, Abdel-Malek AR, Salem SH, Farouk M, Ali MF, Abdelrady YA, Sayed AM. In vitro and In silico assessment of antischistosomal activities of ethanolic extract of Cornulacamonacantha. Exp Parasitol 2023; 254:108631. [PMID: 37820894 DOI: 10.1016/j.exppara.2023.108631] [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: 07/08/2023] [Revised: 08/28/2023] [Accepted: 10/08/2023] [Indexed: 10/13/2023]
Abstract
Schistosomiasis is the second most prevailing parasitic disease worldwide. Although praziquantel is considered an effective drug in the treatment against schistosomiasis to some extent, there is an emerging drug resistance that widely recorded. Therefore, there is an urgent need to develop effective and safe anti-schistosomal drugs. In this study, Cornulaca monacantha (C. monacantha), a sub-saharan plant, was extracted using aqueous ethanol and characterized by High-Performance Liquid Chromatography (HPLC). Major constituents of the extract are belonging to flavonoids, tannins and phenolic glycosides. Worms' viability and surface morphology of Schistosoma mansoni (S. mansoni) adult worms treated with the extract were assessed using in vitro viability assay, Scanning Electron Microscopy (SEM), and histological examination. The extract (80-350 μg/ml) reduced viability percentage of worms by 40-60% and caused degeneration of both oral and ventral suckers, tegumental, sub-tegumental and muscular damage. Molecular docking approach was utilized to assess the binding affinities of the extracted compounds with S. mansoni alpha-carbonic anhydrase (SmCA), an essential tegument protein. Pharmacokinetic analysis using SwissADME showed that 7 compounds have high drug similarity. This study confirms the in vitro schistomicidal activity of C. monacantha extract against S. mansoni adult worms and suggests potential SmCA inhibition.
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Affiliation(s)
- FatmaA S Anwar
- Zoology Department, Faculty of Science, Assiut University, 71516, Egypt
| | | | - Shimaa H Salem
- Botany and Microbiology Department, Faculty of Science, Assiut University, 71516, Egypt
| | - Mohamed Farouk
- Department of Tropical Medicine and Gastroenterology, Faculty of Medicine, New Valley University, 72511, Egypt
| | - Marwa F Ali
- Department of Pathology and Clinical Pathology, Faculty of Veterinary Medicine, Assiut University, Egypt
| | - Yousef A Abdelrady
- Faculty of Pharmacy, Assiut University, Assiut, 71526, Egypt; University of Hamburg, Institute of Pharmacy, 20146, Germany
| | - Ahmed M Sayed
- Biochemistry Laboratory, Chemistry Department, Faculty of Science, Assiut University, 71516, Egypt.
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4
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Supuran CT. A simple yet multifaceted 90 years old, evergreen enzyme: Carbonic anhydrase, its inhibition and activation. Bioorg Med Chem Lett 2023; 93:129411. [PMID: 37507055 DOI: 10.1016/j.bmcl.2023.129411] [Citation(s) in RCA: 30] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Accepted: 07/18/2023] [Indexed: 07/30/2023]
Abstract
Advances in the carbonic anhydrase (CA, EC 4.2.1.1) research over the last three decades are presented, with an emphasis on the deciphering of the activation mechanism, the development of isoform-selective inhibitors/ activators by the tail approach and their applications in the management of obesity, hypoxic tumors, neurological conditions, and as antiinfectives.
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Affiliation(s)
- Claudiu T Supuran
- Neurofarba Department, University of Florence, Section of Pharmaceutical Sciences, Via Ugo Schiff 6, 50019 Sesto Fiorentino, Florence, Italy.
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5
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Okada T, Tomoike F. Distance-based global analysis of consistent cis-bonds in protein backbones. Heliyon 2023; 9:e18598. [PMID: 37576297 PMCID: PMC10413078 DOI: 10.1016/j.heliyon.2023.e18598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 07/13/2023] [Accepted: 07/21/2023] [Indexed: 08/15/2023] Open
Abstract
Biological polypeptides are known to contain cis-linkage in their main chain as a minor but important feature. Such anomalous connection of amino acids has different structural and functional effects on proteins. Experimental evidence of cis-bonds in proteins is mainly obtained using X-ray crystallography and other methods in the field of structural biology. To date, extensive analyses have been carried out on the experimentally found cis-bonds using the Protein Data Bank (PDB) entry-wise or residue-wise; however, their consistency in each protein has not been examined on a global scale. Data accumulation and advances in computational methodology enable the use of new approaches from a proteomic point of view. Here, we sought to carry out protein-wise analysis and describe a simple procedure for the detection and confirmation of cis-bonds from a set of experimental PDB chains for a protein to discriminate this type of bond from isomerizable and/or misassigned bonds. The resulting set of consistent cis bonds (found at identical positions in multiple chains) provides unprecedented insights into the trend of "high cis content" proteins and the upper limit of consistent cis bonds per polypeptide length. Recognizing such limit would not only be important for a practical check of upcoming structures, but also for the design of novel protein folds beyond the evolutionally-acquired repertoire.
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Affiliation(s)
- Tetsuji Okada
- Department of Life Science, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo, 171-8588, Japan
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Kuznetsov YP, Pitushkin DA, Burmistrov VV, Butov GM. Synthesis and Properties of N,N′-Disubstituted Ureas and Their Isosteric Analogs Containing Polycyclic Fragments: XV. N,N′-(Alkane-α,ω-diyl)bis[N′-(adamantan-1-yl)]selenoureas. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2022. [DOI: 10.1134/s1070428022100025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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7
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Angeli A, Velluzzi A, Selleri S, Capasso C, Spadini C, Iannarelli M, Cabassi CS, Carta F, Supuran CT. Seleno Containing Compounds as Potent and Selective Antifungal Agents. ACS Infect Dis 2022; 8:1905-1919. [PMID: 35984421 PMCID: PMC9940851 DOI: 10.1021/acsinfecdis.2c00250] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Fungal promoted infections are becoming a severe health global emergency due to drug-resistant phenomena and zoonosis. This work investigated compounds bearing acyl-/selenoureido moieties and primary/secondary sulfonamide groups as novel antifungal agents acting through organism-directed selenium toxicity and inhibition of the newly emergent therapeutic target, the Carbonic Anhydrases (CAs; EC 4.2.1.1). Reported data clearly indicate that seleno-containing scaffolds with respect to the standard-of-care drugs showed appreciable antifungal activity, which was suppressed when the chalcogen was replaced with its cognate isosteric elements sulfur and oxygen. In addition, such compounds showed excellent selectivity against Malassezia pachydermatis over its related genus strains Malassezia furfur and Malassezia globosa. Safe cytotoxicity profiles on bovine kidney cells (MDBK) and human HaCat cells, as well as the shallow hemolytic activity on defibrinated sheep blood, allowed us to consider these compounds as up-and-coming novel antifungals.
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Affiliation(s)
- Andrea Angeli
- EUROFARBA
Department, Sezione di Scienze Farmaceutiche e Nutraceutiche, University of Florence, Via Ugo Schiff 6, 50019 Sesto Fiorentino, Florence, Italy
| | - Alice Velluzzi
- EUROFARBA
Department, Sezione di Scienze Farmaceutiche e Nutraceutiche, University of Florence, Via Ugo Schiff 6, 50019 Sesto Fiorentino, Florence, Italy
| | - Silvia Selleri
- EUROFARBA
Department, Sezione di Scienze Farmaceutiche e Nutraceutiche, University of Florence, Via Ugo Schiff 6, 50019 Sesto Fiorentino, Florence, Italy
| | - Clemente Capasso
- Department
of Biology, Agriculture and Food Sciences, Institute of Biosciences and Bioresources, 80131 Napoli, Italy
| | - Costanza Spadini
- Department
of Veterinary Science, University of Parma, via del Taglio 10, 43126 Parma, Italy
| | - Mattia Iannarelli
- Department
of Veterinary Science, University of Parma, via del Taglio 10, 43126 Parma, Italy
| | - Clotilde S. Cabassi
- Department
of Veterinary Science, University of Parma, via del Taglio 10, 43126 Parma, Italy,
| | - Fabrizio Carta
- EUROFARBA
Department, Sezione di Scienze Farmaceutiche e Nutraceutiche, University of Florence, Via Ugo Schiff 6, 50019 Sesto Fiorentino, Florence, Italy,
| | - Claudiu T. Supuran
- EUROFARBA
Department, Sezione di Scienze Farmaceutiche e Nutraceutiche, University of Florence, Via Ugo Schiff 6, 50019 Sesto Fiorentino, Florence, Italy
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8
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Aspatwar A, Barker H, Aisala H, Zueva K, Kuuslahti M, Tolvanen M, Primmer CR, Lumme J, Bonardi A, Tripathi A, Parkkila S, Supuran CT. Cloning, purification, kinetic and anion inhibition studies of a recombinant β-carbonic anhydrase from the Atlantic salmon parasite platyhelminth Gyrodactylus salaris. J Enzyme Inhib Med Chem 2022; 37:1577-1586. [PMID: 35637617 PMCID: PMC9176631 DOI: 10.1080/14756366.2022.2080818] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
A β-class carbonic anhydrase (CA, EC 4.2.1.1) was cloned from the genome of the Monogenean platyhelminth Gyrodactylus salaris, a parasite of Atlantic salmon. The new enzyme, GsaCAβ has a significant catalytic activity for the physiological reaction, CO2 + H2O ⇋ HCO3− + H+ with a kcat of 1.1 × 105 s−1 and a kcat/Km of 7.58 × 106 M−1 × s−1. This activity was inhibited by acetazolamide (KI of 0.46 µM), a sulphonamide in clinical use, as well as by selected inorganic anions and small molecules. Most tested anions inhibited GsaCAβ at millimolar concentrations, but sulfamide (KI of 81 µM), N,N-diethyldithiocarbamate (KI of 67 µM) and sulphamic acid (KI of 6.2 µM) showed a rather efficient inhibitory action. There are currently very few non-toxic agents effective in combating this parasite. GsaCAβ is subsequently proposed as a new drug target for which effective inhibitors can be designed.
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Affiliation(s)
- Ashok Aspatwar
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Harlan Barker
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Heidi Aisala
- Ecology and Genetics, University of Oulu, Oulu, Finland
| | - Ksenia Zueva
- Department of Biology, University of Turku, Turku, Finland
| | - Marianne Kuuslahti
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Martti Tolvanen
- Department of Computing, University of Turku, Turku, Finland
| | - Craig R Primmer
- Organismal and Evolutionary Biology Research Programme, University of Helsinki, Helsinki, Finland.,Institute of Biotechnology, Helsinki Institute of Life Science, University of Helsinki, Helsinki, Finland
| | - Jaakko Lumme
- Ecology and Genetics, University of Oulu, Oulu, Finland
| | - Alessandro Bonardi
- Department of Neuroscience, Psychology, Drug Research and Child's Health, Section of Pharmaceutical and Nutraceutical Sciences, University of Florence, Sesto Fiorentino, Italy
| | - Amit Tripathi
- Department of Zoology, University of Lucknow, Lucknow, India
| | - Seppo Parkkila
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland.,Fimlab Ltd, Tampere University Hospital, Tampere, Finland
| | - Claudiu T Supuran
- Department of Neuroscience, Psychology, Drug Research and Child's Health, Section of Pharmaceutical and Nutraceutical Sciences, University of Florence, Sesto Fiorentino, Italy
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Angeli A, Ferraroni M, Carta F, Häberli C, Keiser J, Costantino G, Supuran CT. Development of Praziquantel sulphonamide derivatives as antischistosomal drugs. J Enzyme Inhib Med Chem 2022; 37:1479-1494. [PMID: 35635137 PMCID: PMC9154761 DOI: 10.1080/14756366.2022.2078970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
The almost empty armamentarium to treat schistosomiasis, a neglected parasitic disorder caused by trematode flatworms of the genus Schistosoma, except Praziquantel (PZQ), urged to find new alternatives to fight this infection. Carbonic Anhydrase from Schistosoma mansoni (SmCA) is a possible new target against this nematode. Here, we propose new PZQ derivatives bearing a primary sulphonamide group in order to obtain hybrid drugs. All compounds were evaluated for their inhibition profiles on both humans and Schistosoma CAs, X-ray crystal data of SmCA and hCA II in adduct with some inhibitors were obtained allowing the understanding of the main structural factors responsible of activity. The compounds showed in vitro inhibition of immature and adult S. mansoni, but further optimisation is required for improved activity.
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Affiliation(s)
- Andrea Angeli
- NEUROFARBA Department, Sezione di Scienze Farmaceutiche, University of Florence, Florence, Italy
- Dipartimento di Chimica “Ugo Schiff”, University of Florence, Florence, Italy
| | - Marta Ferraroni
- Department of Food and Drug, University of Parma, Parco Area delle Scienze, Parma, Italy
| | - Fabrizio Carta
- NEUROFARBA Department, Sezione di Scienze Farmaceutiche, University of Florence, Florence, Italy
| | - Cécile Häberli
- Department of Medical Parasitology and Infection Biology, Swiss Tropical and Public Health Institute, Allschwil, Switzerland
- University of Basel, Basel, Switzerland
| | - Jennifer Keiser
- Department of Medical Parasitology and Infection Biology, Swiss Tropical and Public Health Institute, Allschwil, Switzerland
- University of Basel, Basel, Switzerland
| | - Gabriele Costantino
- Dipartimento di Chimica “Ugo Schiff”, University of Florence, Florence, Italy
| | - Claudiu T. Supuran
- NEUROFARBA Department, Sezione di Scienze Farmaceutiche, University of Florence, Florence, Italy
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Ferraroni M, Angeli A, Carradori S, Supuran CT. Inhibition of Schistosoma mansoni carbonic anhydrase by the antiparasitic drug clorsulon: X-ray crystallographic and in vitro studies. ACTA CRYSTALLOGRAPHICA SECTION D STRUCTURAL BIOLOGY 2022; 78:321-327. [PMID: 35234146 PMCID: PMC8900822 DOI: 10.1107/s2059798322000079] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Accepted: 01/03/2022] [Indexed: 11/10/2022]
Abstract
The inhibitory activity of clorsulon and X-ray studies of its complexes with human carbonic anhydrase I and Schistosoma mansoni carbonic anhydrase revealed different modes of binding of this antiparasitic drug, explaining its inhibitory potency against the two enzymes. Clorsulon is an anthelmintic drug that is clinically used against Fasciola hepatica. Due to the presence of two sulfonamide moieties in its core nucleus, which are well recognized as zinc-binding groups, it was proposed that it may be efficacious in the inhibition of parasite carbonic anhydrases (CAs). Proteomic analyses revealed the presence of CA in the tegument of Schistosoma mansoni, and recently the druggability of this target was explored by testing the inhibitory activities of several sulfonamide-based derivatives. According to the principles of drug repurposing, the aim was to demonstrate a putative new mechanism of action of clorsulon and thus widen its antiparasitic spectrum. For this purpose, the inhibitory activity and isoform selectivity of clorsulon was studied using human CA I and S. mansoni CA, revealing different modes of binding of clorsulon that explain its inhibitory potency against the two enzymes. The information obtained in this study could be crucial in the design of more active and selective derivatives.
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