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Messore A, Malune P, Patacchini E, Madia VN, Ialongo D, Arpacioglu M, Albano A, Ruggieri G, Saccoliti F, Scipione L, Tramontano E, Canton S, Corona A, Scognamiglio S, Paulis A, Suleiman M, Al-Maqtari HM, Abid FMA, Kawsar SMA, Sankaranarayanan M, Di Santo R, Esposito F, Costi R. New Thiazolidine-4-One Derivatives as SARS-CoV-2 Main Protease Inhibitors. Pharmaceuticals (Basel) 2024; 17:650. [PMID: 38794220 PMCID: PMC11124136 DOI: 10.3390/ph17050650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Revised: 05/10/2024] [Accepted: 05/15/2024] [Indexed: 05/26/2024] Open
Abstract
It has been more than four years since the first report of SARS-CoV-2, and humankind has experienced a pandemic with an unprecedented impact. Moreover, the new variants have made the situation even worse. Among viral enzymes, the SARS-CoV-2 main protease (Mpro) has been deemed a promising drug target vs. COVID-19. Indeed, Mpro is a pivotal enzyme for viral replication, and it is highly conserved within coronaviruses. It showed a high extent of conservation of the protease residues essential to the enzymatic activity, emphasizing its potential as a drug target to develop wide-spectrum antiviral agents effective not only vs. SARS-CoV-2 variants but also against other coronaviruses. Even though the FDA-approved drug nirmatrelvir, a Mpro inhibitor, has boosted the antiviral therapy for the treatment of COVID-19, the drug shows several drawbacks that hinder its clinical application. Herein, we report the synthesis of new thiazolidine-4-one derivatives endowed with inhibitory potencies in the micromolar range against SARS-CoV-2 Mpro. In silico studies shed light on the key structural requirements responsible for binding to highly conserved enzymatic residues, showing that the thiazolidinone core acts as a mimetic of the Gln amino acid of the natural substrate and the central role of the nitro-substituted aromatic portion in establishing π-π stacking interactions with the catalytic His-41 residue.
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Affiliation(s)
- Antonella Messore
- Istituto Pasteur-Fondazione Cenci Bolognetti, Dipartimento di Chimica e Tecnologie del Farmaco, “Sapienza” Università di Roma, p.le Aldo Moro 5, 00185 Rome, Italy; (A.M.); (E.P.); (D.I.); (M.A.); (A.A.); (G.R.); (F.S.); (L.S.); (R.D.S.); (R.C.)
| | - Paolo Malune
- Department of Life and Environmental Sciences, Faculty of Biology and Pharmacy, University of Cagliari, Cittadella Universitaria di Monserrato, ss554 Km 4500, 09045 Monserrato, Cagliari, Italy; (P.M.); (E.T.); (S.C.); (A.C.); (S.S.); (A.P.)
| | - Elisa Patacchini
- Istituto Pasteur-Fondazione Cenci Bolognetti, Dipartimento di Chimica e Tecnologie del Farmaco, “Sapienza” Università di Roma, p.le Aldo Moro 5, 00185 Rome, Italy; (A.M.); (E.P.); (D.I.); (M.A.); (A.A.); (G.R.); (F.S.); (L.S.); (R.D.S.); (R.C.)
| | - Valentina Noemi Madia
- Istituto Pasteur-Fondazione Cenci Bolognetti, Dipartimento di Chimica e Tecnologie del Farmaco, “Sapienza” Università di Roma, p.le Aldo Moro 5, 00185 Rome, Italy; (A.M.); (E.P.); (D.I.); (M.A.); (A.A.); (G.R.); (F.S.); (L.S.); (R.D.S.); (R.C.)
| | - Davide Ialongo
- Istituto Pasteur-Fondazione Cenci Bolognetti, Dipartimento di Chimica e Tecnologie del Farmaco, “Sapienza” Università di Roma, p.le Aldo Moro 5, 00185 Rome, Italy; (A.M.); (E.P.); (D.I.); (M.A.); (A.A.); (G.R.); (F.S.); (L.S.); (R.D.S.); (R.C.)
| | - Merve Arpacioglu
- Istituto Pasteur-Fondazione Cenci Bolognetti, Dipartimento di Chimica e Tecnologie del Farmaco, “Sapienza” Università di Roma, p.le Aldo Moro 5, 00185 Rome, Italy; (A.M.); (E.P.); (D.I.); (M.A.); (A.A.); (G.R.); (F.S.); (L.S.); (R.D.S.); (R.C.)
| | - Aurora Albano
- Istituto Pasteur-Fondazione Cenci Bolognetti, Dipartimento di Chimica e Tecnologie del Farmaco, “Sapienza” Università di Roma, p.le Aldo Moro 5, 00185 Rome, Italy; (A.M.); (E.P.); (D.I.); (M.A.); (A.A.); (G.R.); (F.S.); (L.S.); (R.D.S.); (R.C.)
| | - Giuseppe Ruggieri
- Istituto Pasteur-Fondazione Cenci Bolognetti, Dipartimento di Chimica e Tecnologie del Farmaco, “Sapienza” Università di Roma, p.le Aldo Moro 5, 00185 Rome, Italy; (A.M.); (E.P.); (D.I.); (M.A.); (A.A.); (G.R.); (F.S.); (L.S.); (R.D.S.); (R.C.)
| | - Francesco Saccoliti
- Istituto Pasteur-Fondazione Cenci Bolognetti, Dipartimento di Chimica e Tecnologie del Farmaco, “Sapienza” Università di Roma, p.le Aldo Moro 5, 00185 Rome, Italy; (A.M.); (E.P.); (D.I.); (M.A.); (A.A.); (G.R.); (F.S.); (L.S.); (R.D.S.); (R.C.)
| | - Luigi Scipione
- Istituto Pasteur-Fondazione Cenci Bolognetti, Dipartimento di Chimica e Tecnologie del Farmaco, “Sapienza” Università di Roma, p.le Aldo Moro 5, 00185 Rome, Italy; (A.M.); (E.P.); (D.I.); (M.A.); (A.A.); (G.R.); (F.S.); (L.S.); (R.D.S.); (R.C.)
| | - Enzo Tramontano
- Department of Life and Environmental Sciences, Faculty of Biology and Pharmacy, University of Cagliari, Cittadella Universitaria di Monserrato, ss554 Km 4500, 09045 Monserrato, Cagliari, Italy; (P.M.); (E.T.); (S.C.); (A.C.); (S.S.); (A.P.)
| | - Serena Canton
- Department of Life and Environmental Sciences, Faculty of Biology and Pharmacy, University of Cagliari, Cittadella Universitaria di Monserrato, ss554 Km 4500, 09045 Monserrato, Cagliari, Italy; (P.M.); (E.T.); (S.C.); (A.C.); (S.S.); (A.P.)
| | - Angela Corona
- Department of Life and Environmental Sciences, Faculty of Biology and Pharmacy, University of Cagliari, Cittadella Universitaria di Monserrato, ss554 Km 4500, 09045 Monserrato, Cagliari, Italy; (P.M.); (E.T.); (S.C.); (A.C.); (S.S.); (A.P.)
| | - Sante Scognamiglio
- Department of Life and Environmental Sciences, Faculty of Biology and Pharmacy, University of Cagliari, Cittadella Universitaria di Monserrato, ss554 Km 4500, 09045 Monserrato, Cagliari, Italy; (P.M.); (E.T.); (S.C.); (A.C.); (S.S.); (A.P.)
| | - Annalaura Paulis
- Department of Life and Environmental Sciences, Faculty of Biology and Pharmacy, University of Cagliari, Cittadella Universitaria di Monserrato, ss554 Km 4500, 09045 Monserrato, Cagliari, Italy; (P.M.); (E.T.); (S.C.); (A.C.); (S.S.); (A.P.)
| | - Mustapha Suleiman
- Department of Chemistry, Sokoto State University, Sokoto 852101, Nigeria;
| | | | - Fatma Mohamed A. Abid
- Department of Chemistry, Faculty of Science, Al-Azzaytuna University, Tarhuna 537622224, Libya;
| | - Sarkar M. A. Kawsar
- Laboratory of Carbohydrate and Nucleoside Chemistry, Department of Chemistry, University of Chittagong, Chittagong 4331, Bangladesh;
| | - Murugesan Sankaranarayanan
- Medicinal Chemistry Research Laboratory, Birla Institute of Technology and Science Pilani, Pilani Campus, Pilani 333031, Rajasthan, India;
| | - Roberto Di Santo
- Istituto Pasteur-Fondazione Cenci Bolognetti, Dipartimento di Chimica e Tecnologie del Farmaco, “Sapienza” Università di Roma, p.le Aldo Moro 5, 00185 Rome, Italy; (A.M.); (E.P.); (D.I.); (M.A.); (A.A.); (G.R.); (F.S.); (L.S.); (R.D.S.); (R.C.)
| | - Francesca Esposito
- Department of Life and Environmental Sciences, Faculty of Biology and Pharmacy, University of Cagliari, Cittadella Universitaria di Monserrato, ss554 Km 4500, 09045 Monserrato, Cagliari, Italy; (P.M.); (E.T.); (S.C.); (A.C.); (S.S.); (A.P.)
| | - Roberta Costi
- Istituto Pasteur-Fondazione Cenci Bolognetti, Dipartimento di Chimica e Tecnologie del Farmaco, “Sapienza” Università di Roma, p.le Aldo Moro 5, 00185 Rome, Italy; (A.M.); (E.P.); (D.I.); (M.A.); (A.A.); (G.R.); (F.S.); (L.S.); (R.D.S.); (R.C.)
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Deng W, Zhang CY, Dou LX, Huang LT, Wang JT, Liao XW, Wang LP, Yu RJ, Xiong YS. Polypyridyl ruthenium complexes with benzothiazole moiety as membrane disruptors and anti-resistance agents for Staphylococcus aureus. J Inorg Biochem 2024; 254:112517. [PMID: 38460482 DOI: 10.1016/j.jinorgbio.2024.112517] [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: 12/05/2023] [Revised: 03/01/2024] [Accepted: 03/04/2024] [Indexed: 03/11/2024]
Abstract
Developing new antimicrobials to combat drug-resistant bacterial infections is necessary due to the increasing problem of bacterial resistance. In this study, four metallic ruthenium complexes modified with benzothiazoles were designed, synthesized and subjected to bio-evaluated. Among them, Ru-2 displayed remarkable inhibitory activity against Staphylococcus aureus (S. aureus) with a minimum inhibitory concentration (MIC) of 1.56 μg/mL. Additionally, it showcased low hemolytic toxicity (HC50 > 200 μg/mL) and the ability to effectively eradicate S. aureus without fostering drug resistance. Further investigation into the antibacterial mechanism suggested that Ru-2 may target the phospholipid component of S. aureus, leading to the disruption of the bacterial cell membrane and subsequent leakage of cell contents (nucleic acid, protein, and ONPG), ultimately resulting in the death of the bacterial cell. In vivo studies, both the G. mellonella larvae and the mouse skin infection models were conducted, indicated that Ru-2 could potentially serve as a viable candidate for the treatment of S. aureus infection. It exhibited no toxic or side effects on normal tissues. The results suggest that benzothiazole-modified ruthenium complexes may have potential as membrane-active antimicrobials against drug-resistant bacterial infections.
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Affiliation(s)
- Wei Deng
- School of Pharmacy, Jiangxi Science & Technology Normal University, Nanchang 330013, China
| | - Chun-Yan Zhang
- School of Pharmacy, Jiangxi Science & Technology Normal University, Nanchang 330013, China
| | - Li-Xin Dou
- School of Pharmacy, Jiangxi Science & Technology Normal University, Nanchang 330013, China
| | - Li-Ting Huang
- School of Pharmacy, Jiangxi Science & Technology Normal University, Nanchang 330013, China
| | - Jin-Tiao Wang
- School of Pharmacy, Jiangxi Science & Technology Normal University, Nanchang 330013, China
| | - Xiang-Wen Liao
- School of Pharmacy, Jiangxi Science & Technology Normal University, Nanchang 330013, China
| | - Li-Ping Wang
- School of Life Science, Jiangxi Science & Technology Normal University, Nanchang 330013, China
| | - Ru-Jian Yu
- School of Life Science, Jiangxi Science & Technology Normal University, Nanchang 330013, China
| | - Yan-Shi Xiong
- School of Pharmacy, Jiangxi Science & Technology Normal University, Nanchang 330013, China.
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Hassan SA, Aziz DM, Abdullah MN, Bhat AR, Dongre RS, Hadda TB, Almalki FA, Kawsar SMA, Rahiman AK, Ahmed S, Abdellattif MH, Berredjem M, Sheikh SA, Jamalis J. In vitro and in vivo evaluation of the antimicrobial, antioxidant, cytotoxic, hemolytic activities and in silico POM/DFT/DNA-binding and pharmacokinetic analyses of new sulfonamide bearing thiazolidin-4-ones. J Biomol Struct Dyn 2024; 42:3747-3763. [PMID: 37402503 DOI: 10.1080/07391102.2023.2226713] [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: 11/24/2022] [Accepted: 05/11/2023] [Indexed: 07/06/2023]
Abstract
In this work, Schiff bases and Thiazolidin-4-ones, were synthesized using Sonication and Microwave techniques, respectively. The Schiff base derivatives (3a-b) were synthesized via the reaction of Sulfathiazole (1) with benzaldehyde derivatives (2a-b), followed by the synthesis of 4-thiazoledinone (4a-b) derivatives by cyclizing the synthesized Schiff bases through thioglycholic acid. All the synthesized compounds were characterized by spectroscopic techniques such as FT IR, NMR and HRMS. The synthesized compounds were tested for their in vitro antimicrobial and antioxidant and in vivo cytotoxicity and hemolysis ability. The synthesized compounds displayed better antimicrobial and antioxidant activity and low toxicity in comparison to reference drugs and negative controls, respectively. The hemolysis test revealed the compounds exhibit lower hemolytic effects and hemolytic values are comparatively low and the safety of compounds is in comparison with standard drugs. Theoretical calculations were carried out by using the molecular operating environment (MOE) and Gaussian computing software and observations were in good agreement with the in vitro and in vivo biological activities. Petra/Osiris/Molinspiration (POM) results indicate the presence of three combined antibacterial, antiviral and antitumor pharmacophore sites. The molecular docking revealed the significant binding affinities and non-bonding interactions between the compounds and Erwinia Chrysanthemi (PDB ID: 1SHK). The molecular dynamics simulation under in silico physiological conditions revealed a stable conformation and binding pattern in a stimulating environment. HighlightsNew series of Thaiazolidin-4-one derivatives have been synthesized.Sonication and microwave techniques are used.Antimicrobial, Antioxidant, cytotoxicity, and hemolysis activities were observed for all synthesized compounds.Molecular Docking and DFT/POM analyses have been predicted.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Sangar Ali Hassan
- Department of Chemistry, College of Science, University of Raparin, Sulaymaniyah, Iraq
| | - Dara Muhammed Aziz
- Department of Chemistry, College of Science, University of Raparin, Sulaymaniyah, Iraq
| | | | - Ajmal R Bhat
- Department of Chemistry, R.T.M. Nagpur University, Nagpur, India
| | | | - Taibi Ben Hadda
- Laboratory of Applied Chemistry & Environment, Faculty of Sciences, Mohammed Premier University, Oujda, Morocco
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Faisal A Almalki
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Sarkar M A Kawsar
- Laboratory of Carbohydrate and Nucleoside Chemistry, Department of Chemistry, University of Chittagong, Chittagong, Bangladesh
| | - Aziz Kalilur Rahiman
- Post-Graduate and Research Department of Chemistry, The New College (Autonomous), University of Madras, Chennai, India
| | - Sumeer Ahmed
- Post-Graduate and Research Department of Chemistry, The New College (Autonomous), University of Madras, Chennai, India
| | - Magda H Abdellattif
- Department of Chemistry, College of Science, Taif University, Al-Haweiah, Taif, Saudi Arabia
| | - Malika Berredjem
- Laboratory of Applied Organic Chemistry LCOA, Synthesis of Biomolecules and Molecular Modelling Group, Badji-Mokhtar - Annaba University, Annaba, Algeria
| | - S A Sheikh
- Department of physics, National Institute of Technology, Srinagar, Kashmir, India
| | - Joazaizulfazli Jamalis
- Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia, Johor Bahru, Johor, Malaysia
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Dwivedi B, Bhardwaj D, Choudhary D. Green design and synthesis of some novel thiazolidinone appended benzothiazole-triazole hybrids as antimicrobial agents. RSC Adv 2024; 14:8341-8352. [PMID: 38476177 PMCID: PMC10928519 DOI: 10.1039/d4ra00990h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Accepted: 03/07/2024] [Indexed: 03/14/2024] Open
Abstract
The global increase in bacterial resistance poses a significant threat, jeopardizing the effectiveness of antibiotics. Therefore, the development of new and efficient antimicrobial agents is pre-dominant. Taking this into consideration, in the present study, we designed and reported the facile synthesis of two novel series benzothiazole-triazole and thiazolidinone-appended benzothiazole-triazole hybrids using a molecular hybridization approach in a one-pot process. The synthesized compounds were tested for microbial growth inhibition against bacterial and fungal strains. Among all the synthetics, compounds derived from methoxyphenyl and heteroaromatic ring substitutions exhibited promising inhibitory activity. The current investigation has emphasized that benzothiazole-triazole hybrids incorporating thiazolidinone can be a promising and potent category of molecules with potential biological activities. This sustainable and eco-friendly protocol involves the metal-free, catalyst-free synthesis of bioactive scaffolds, which merges broad tolerance for functional groups with a short reaction time, resulting in good to excellent yields.
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Affiliation(s)
- Bhaskar Dwivedi
- Department of Chemistry, University of Rajasthan Jaipur Rajasthan India
| | - Diksha Bhardwaj
- Department of Chemistry, S. S. Jain Subodh PG College Jaipur Rajasthan India
| | - Deepika Choudhary
- Department of Chemistry, University of Rajasthan Jaipur Rajasthan India
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Trotsko N. Thiazolidin-4-Ones as a Promising Scaffold in the Development of Antibiofilm Agents-A Review. Int J Mol Sci 2023; 25:325. [PMID: 38203498 PMCID: PMC10778874 DOI: 10.3390/ijms25010325] [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: 11/26/2023] [Revised: 12/12/2023] [Accepted: 12/24/2023] [Indexed: 01/12/2024] Open
Abstract
Thiazolidin-4-ones have a broad range of medical and clinical implementation, which is important for pharmaceutical and medicinal chemistry. This heterocyclic core has been reported to possess a diversity of bioactivities, including antimicrobial and antibiofilm-forming potential. The resistance of biofilms to antibiotics or disinfectants is a serious medical problem. Therefore, there is a natural need to discover new effective structures with properties that inhibit biofilm formation. This review aims to analyze the antibiofilm features of thiazolidin-4-ones described in the literature over the last two decades. The information gathered in this review could benefit the rational design of new effective antibiofilm small molecules with thiazolidin-4-one cores.
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Affiliation(s)
- Nazar Trotsko
- Department of Organic Chemistry, Faculty of Pharmacy, Medical University of Lublin, 4A Chodźki Street, 20-093 Lublin, Poland
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Guo J, Xie Z, Ruan W, Tang Q, Qiao D, Zhu W. Thiazole-based analogues as potential antibacterial agents against methicillin-resistant Staphylococcus aureus (MRSA) and their SAR elucidation. Eur J Med Chem 2023; 259:115689. [PMID: 37542993 DOI: 10.1016/j.ejmech.2023.115689] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 07/25/2023] [Accepted: 07/26/2023] [Indexed: 08/07/2023]
Abstract
In recent years, the overuse of antibiotics has resulted in the emergence of antibiotic resistance, which is a serious global health problem. Methicillin-resistant Staphylococcus aureus (MRSA) is a common and virulent bacterium in clinical practice. Numerous researchers have focused on developing new candidate drugs that are effective, less toxic, and can overcome MRSA resistance. Thiazole derivatives have been found to exhibit antibacterial activity against drug-sensitive and drug-resistant pathogens. By hybridizing thiazole with other antibacterial pharmacophores, it is possible to obtain more effective antibacterial candidate drugs. Thiazole derivatives have shown potential in developing new drugs that can overcome drug resistance, reduce toxicity, and improve pharmacokinetic characteristics. This article reviews the recent progress of thiazole compounds as potential antibacterial compounds and examines the structure-activity relationship (SAR) in various directions. It covers articles published from 2018 to 2023, providing a comprehensive platform to plan and develop new thiazole-based small MRSA growth inhibitors with minimal side effects.
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Affiliation(s)
- Jiaojiao Guo
- Jiangxi Provincial Key Laboratory of Drug Design and Evaluation, School of Pharmacy, Jiangxi Science & Technology Normal University, Nanchang, 330013, China
| | - Zhouling Xie
- Jiangxi Provincial Key Laboratory of Drug Design and Evaluation, School of Pharmacy, Jiangxi Science & Technology Normal University, Nanchang, 330013, China
| | - Wei Ruan
- Jiangxi Provincial Key Laboratory of Drug Design and Evaluation, School of Pharmacy, Jiangxi Science & Technology Normal University, Nanchang, 330013, China
| | - Qidong Tang
- Jiangxi Provincial Key Laboratory of Drug Design and Evaluation, School of Pharmacy, Jiangxi Science & Technology Normal University, Nanchang, 330013, China
| | - Dan Qiao
- Jiangxi Provincial Key Laboratory of Drug Design and Evaluation, School of Pharmacy, Jiangxi Science & Technology Normal University, Nanchang, 330013, China.
| | - Wufu Zhu
- Jiangxi Provincial Key Laboratory of Drug Design and Evaluation, School of Pharmacy, Jiangxi Science & Technology Normal University, Nanchang, 330013, China.
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Pyrih A, Łapiński A, Zięba S, Mizera A, Lesyk R, Gzella AK, Jaskolski M. Proton tautomerism and stereoisomerism in 5-[(dimethylamino)methylidene]-4-[3/4-(trifluoromethylphenyl)amino]-1,3-thiazol-2(5H)-ones: synthesis, crystal structure and spectroscopic studies. Acta Crystallogr C Struct Chem 2023; 79:480-490. [PMID: 37874207 DOI: 10.1107/s2053229623009087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Accepted: 10/16/2023] [Indexed: 10/25/2023] Open
Abstract
5-[(Dimethylamino)methylidene]-4-{[3-(trifluoromethyl)phenyl]amino}-1,3-thiazol-2(5H)-one and the [4-(trifluoromethyl)phenyl]amino derivative, both C13H12F3N3OS, with the trifluoromethyl group substituted at the arene ring at the meta and para positions, were synthesized to study the structural changes associated with proton tautomerism of the amidine system. The studied compounds were found to be in the amine tautomeric form in both the solid and the liquid (dimethyl sulfoxide solutions) phase. In both isomers, the [(trifluoromethyl)phenyl]amino residue assumes a synperiplanar conformation with respect to the thiazolone system, while the 5-[(dimethylamino)methylidene] residue adopts the Z configuration. Density functional theory (DFT) calculations correctly predicted that the synperiplanar arrangement is favoured in both isomers. In the crystal, the whole independent molecule of the para compound is disordered over two alternative positions, with occupancy factors of 0.926 (3) and 0.074 (3).
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Affiliation(s)
- Andrii Pyrih
- Department of Crystallography, Faculty of Chemistry, A. Mickiewicz University, Uniwersytetu Poznanskiego 8, 61-614 Poznan, Poland
| | - Andrzej Łapiński
- Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznan, Poland
| | - Sylwia Zięba
- Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznan, Poland
| | - Adam Mizera
- Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznan, Poland
| | - Roman Lesyk
- Department of Pharmaceutical, Organic and Bioorganic Chemistry, Danylo Halytsky Lviv National Medical University, Pekarska 69, Lviv 79010, Ukraine
| | - Andrzej K Gzella
- Department of Organic Chemistry, Poznan University of Medical Sciences, Grunwaldzka 6, 60-780 Poznan, Poland
| | - Mariusz Jaskolski
- Department of Crystallography, Faculty of Chemistry, A. Mickiewicz University, Uniwersytetu Poznanskiego 8, 61-614 Poznan, Poland
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Cheerala VSK, Akhir A, Saxena D, Maitra R, Chopra S, Neelakantan SC. Discovery of benzoxazole-thiazolidinone hybrids as promising antibacterial agents against Staphylococcus aureus and Enterococcus species. RSC Med Chem 2023; 14:1712-1721. [PMID: 37731699 PMCID: PMC10507814 DOI: 10.1039/d3md00290j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Accepted: 07/17/2023] [Indexed: 09/22/2023] Open
Abstract
Antibiotic resistance is rapidly exacerbating the unceasing rise in nosocomial infections caused by drug-resistant bacterial pathogens such as methicillin-resistant Staphylococcus aureus (MRSA), carbapenem-resistant Enterobacteriaceae (CRE) and vancomycin-resistant Enterococcus (VRE). Therefore, there is a dire need for new therapeutic agents that can mitigate the unbridled emergence of drug-resistant pathogens. In the present study, several benzoxazole-thiazolidinone hybrids (BT hybrids) were synthesized and evaluated for their antibacterial activity against the ESKAP pathogen panel. The preliminary screening revealed the selective and potent inhibitory activity of hydroxy BT hybrids against S. aureus with MIC ≤ 4 μg mL-1. Hydroxy compounds (BT25, BT26, BT18, BT12, and BT11) exhibited a good selectivity index (SI > 20), which were determined to be non-toxic to Vero cells. An engaging fact is that two compounds BT25 and BT26 showed potent activity against various clinically-relevant and highly drug resistant S. aureus (MRSA & VRSA) and Enterococcus (VRE) isolates. These hybrids showed concentration-dependent bactericidal activity that is comparable to vancomycin. These experimental results were corroborated with docking, molecular dynamics, and free energy studies to discern the antibacterial mechanisms of hydroxy BT hybrids with three bacterial enzymes DNA gyrase B, MurB, and penicillin binding protein 4 (PBP4). The reassuring outcome of the current investigation confirmed that the aforementioned BT hybrids could be used as very promisingly potent antibacterial agents for the treatment of Staphylococcus aureus and Enterococcus infections.
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Affiliation(s)
- Vijay Sai Krishna Cheerala
- Department of Chemistry, Sri Sathya Sai Institute of Higher Learning Brindavan Campus Bengaluru 560067 Karnataka India +91 7975943998
| | - Abdul Akhir
- Division of Molecular Microbiology and Immunology, CSIR-Central Drug Research Institute Sector 10, Sitapur Road Lucknow - 226031 Uttar Pradesh India +91 7652032958
| | - Deepanshi Saxena
- Division of Molecular Microbiology and Immunology, CSIR-Central Drug Research Institute Sector 10, Sitapur Road Lucknow - 226031 Uttar Pradesh India +91 7652032958
| | - Rahul Maitra
- Division of Molecular Microbiology and Immunology, CSIR-Central Drug Research Institute Sector 10, Sitapur Road Lucknow - 226031 Uttar Pradesh India +91 7652032958
| | - Sidharth Chopra
- Division of Molecular Microbiology and Immunology, CSIR-Central Drug Research Institute Sector 10, Sitapur Road Lucknow - 226031 Uttar Pradesh India +91 7652032958
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Sundaresan Chittor Neelakantan
- Department of Chemistry, Sri Sathya Sai Institute of Higher Learning Brindavan Campus Bengaluru 560067 Karnataka India +91 7975943998
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Moulishankar A, Thirugnanasambandam S. Quantitative structure activity relationship (QSAR) modeling study of some novel thiazolidine 4-one derivatives as potent anti-tubercular agents. J Recept Signal Transduct Res 2023; 43:83-92. [PMID: 37990804 DOI: 10.1080/10799893.2023.2281671] [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: 05/15/2023] [Accepted: 09/03/2023] [Indexed: 11/23/2023]
Abstract
This study aims to develop a QSAR model for Antitubercular activity. The quantitative structure-activity relationship (QSAR) approach predicted the thiazolidine-4-ones derivative's Antitubercular activity. For the QSAR study, 53 molecules with Antitubercular activity on H37Rv were collected from the literature. Compound structures were drawn by ACD/Labs ChemSketch. The energy minimization of the 2D structure was done using the MM2 force field in Chem3D pro. PaDEL Descriptor software was used to construct the molecular descriptors. QSARINS software was used in this work to develop the 2D QSAR model. A series of thiazolidine 4-one with MIC data were taken from the literature to develop the QSAR model. These compounds were split into a training set (43 compounds) and a test set (10 compounds). The PaDEL software calculated 2300 descriptors for this series of thiazolidine 4-one derivatives. The best predictive Model 4, which has R2 of 0.9092, R2adj of 0.8950 and LOF parameter of 0.0289 identify a preferred fit. The QSAR study resulted in a stable, predictive, and robust model representing the original dataset. In the QSAR equation, the molecular descriptor of MLFER_S, GATSe2, Shal, and EstateVSA 6 positively correlated with Antitubercular activity. While the SpMAD_Dzs 6 is negatively correlated with Antitubercular activity. The high polarizability, Electronegativities, Surface area contributions and number of Halogen atoms in the thiazolidine 4-one derivatives will increase the Antitubercular activity.
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Affiliation(s)
- Anguraj Moulishankar
- Department of Pharmaceutical Chemistry, SRM College of Pharmacy, SRM Institute of Science and Technology, Kattankulathur, Chengalpattu, Tamil Nadu 603203, India
| | - Sundarrajan Thirugnanasambandam
- Department of Pharmaceutical Chemistry, SRM College of Pharmacy, SRM Institute of Science and Technology, Kattankulathur, Chengalpattu, Tamil Nadu 603203, India
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10
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Kashyap P, Verma S, Gupta P, Narang R, Lal S, Devgun M. Recent insights into antibacterial potential of benzothiazole derivatives. Med Chem Res 2023; 32:1-31. [PMID: 37362317 PMCID: PMC10226039 DOI: 10.1007/s00044-023-03077-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 05/09/2023] [Indexed: 06/28/2023]
Abstract
Antimicrobial resistance (AMR) is a worldwide concern among infectious diseases due to increased mortality, morbidity and treatment cost. According to WHO 2019 report, among the 32 antibiotics in the clinical trials, only six were classified as innovative and containing novel moiety. The remaining antibiotics from this list contain previously known moiety (WHO AMR 2019). Therefore, the development of novel antibiotics to control resistance problems is crucial. Benzothiazole derivatives are of great interest due to their wide range of biological activities and medicinal applications. Reported data indicated that benzothiazole derivatives displayed antibacterial activity by inhibiting the dihydroorotase, DNA gyrase, uridine diphosphate-n-acetyl enol pyruvyl glucosamine reductase (MurB), peptide deformylase, aldose reductase, casdihydrofolate reductase, enoyl acyl carrier protein reductase, dialkylglycine decarboxylase, dehydrosqualene synthase, dihydropteroate synthase and tyrosine kinase. The present review analyzed the synthesis, structure-activity relationship (SAR) and mechanism of action studies of benzothiazole derivatives as antibacterial agents reported by various research groups in the last five years (2018-2022). Different patents on the antimicrobial activity of benzothiazole derivatives have also been summarized. The finding of the present review will be beneficial for the researchers in the development of novel antibacterial molecules based on benzothiazole moiety. Graphical Abstract
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Affiliation(s)
- Priyanka Kashyap
- Institute of Pharmaceutical Sciences, Kurukshetra University, Kurukshetra, 136119 India
| | - Sangeeta Verma
- Institute of Pharmaceutical Sciences, Kurukshetra University, Kurukshetra, 136119 India
| | - Pankaj Gupta
- Institute of Pharmaceutical Sciences, Kurukshetra University, Kurukshetra, 136119 India
| | - Rakesh Narang
- Institute of Pharmaceutical Sciences, Kurukshetra University, Kurukshetra, 136119 India
| | - Sukhbir Lal
- Institute of Pharmaceutical Sciences, Kurukshetra University, Kurukshetra, 136119 India
| | - Manish Devgun
- Institute of Pharmaceutical Sciences, Kurukshetra University, Kurukshetra, 136119 India
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11
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Haroun M, Fesatidou M, Petrou A, Tratrat C, Zagaliotis P, Gavalas A, Venugopala KN, Kochkar H, Emeka PM, Younis NS, Elmaghraby DA, Almostafa MM, Chohan MS, Vizirianakis IS, Papadimitriou-Tsantarliotou A, Geronikaki A. Identification of Novel Cyclooxygenase-1 Selective Inhibitors of Thiadiazole-Based Scaffold as Potent Anti-Inflammatory Agents with Safety Gastric and Cytotoxic Profile. Molecules 2023; 28:molecules28083416. [PMID: 37110650 PMCID: PMC10142904 DOI: 10.3390/molecules28083416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 04/08/2023] [Accepted: 04/10/2023] [Indexed: 04/29/2023] Open
Abstract
Major obstacles faced by the use of nonsteroidal anti-inflammatory drugs (NSAID) are their gastrointestinal toxicity induced by non-selective inhibition of both cyclooxygenases (COX) 1 and 2 and their cardiotoxicity associated with a certain class of COX-2 selective inhibitors. Recent studies have demonstrated that selective COX-1 and COX-2 inhibition generates compounds with no gastric damage. The aim of the current study is to develop novel anti-inflammatory agents with a better gastric profile. In our previous paper, we investigated the anti-inflammatory activity of 4-methylthiazole-based thiazolidinones. Thus, based on these observations, herein we report the evaluation of anti-inflammatory activity, drug action, ulcerogenicity and cytotoxicity of a series of 5-adamantylthiadiazole-based thiazolidinone derivatives. The in vivo anti-inflammatory activity revealed that the compounds possessed moderate to excellent anti-inflammatory activity. Four compounds 3, 4, 10 and 11 showed highest potency (62.0, 66.7, 55.8 and 60.0%, respectively), which was higher than the control drug indomethacin (47.0%). To determine their possible mode of action, the enzymatic assay was conducted against COX-1, COX-2 and LOX. The biological results demonstrated that these compounds are effective COX-1 inhibitors. Thus, the IC50 values of the three most active compounds 3, 4 and 14 as COX-1 inhibitors were 1.08, 1.12 and 9.62 μΜ, respectively, compared to ibuprofen (12.7 μΜ) and naproxen (40.10 μΜ) used as control drugs. Moreover, the ulcerogenic effect of the best compounds 3, 4 and 14 were evaluated and revealed that no gastric damage was observed. Furthermore, compounds were found to be nontoxic. A molecular modeling study provided molecular insight to rationalize the COX selectivity. In summary, we discovered a novel class of selective COX-1 inhibitors that could be effectively used as potential anti-inflammatory agents.
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Affiliation(s)
- Michelyne Haroun
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia
| | - Maria Fesatidou
- School of Pharmacy, Aristotle, University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Anthi Petrou
- School of Pharmacy, Aristotle, University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Christophe Tratrat
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia
| | - Panagiotis Zagaliotis
- School of Pharmacy, Aristotle, University of Thessaloniki, 54124 Thessaloniki, Greece
- Division of Infectious Diseases, Weill Cornell Medicine, New York, NY 10065, USA
| | - Antonis Gavalas
- School of Pharmacy, Aristotle, University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Katharigatta N Venugopala
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia
- Department of Biotechnology and Food Technology, Faculty of Applied Sciences, Durban University of Technology, Durban 4001, South Africa
| | - Hafedh Kochkar
- Department of Chemistry, College of Science, Imam Abdulrahman Bin Faisal University, Dammam 31441, Saudi Arabia
- Basic & Applied Scientific Research Center, Imam Abdulrahman Bin Faisal University, Dammam 31441, Saudi Arabia
| | - Promise M Emeka
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia
| | - Nancy S Younis
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia
| | - Dalia Ahmed Elmaghraby
- Department of Pharmacy Practice, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia
| | - Mervt M Almostafa
- Department of Chemistry, College of Science, King Faisal University, Al-Ahsa 31982, Saudi Arabia
| | - Muhammad Shahzad Chohan
- Biomedical Sciences Department, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia
| | - Ioannis S Vizirianakis
- Laboratory of Pharmacology, School of Pharmacy, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
- Department of Health Sciences, School of Life and Health Sciences, University of Nicosia, 2417 Nicosia, Cyprus
| | | | - Athina Geronikaki
- School of Pharmacy, Aristotle, University of Thessaloniki, 54124 Thessaloniki, Greece
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12
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Sheikh A, Nadeem H, Khan MT, Saeed A, Murtaza B. Antibacterial Potential of Novel Acetamide Derivatives of 2-Mercaptobenzothiazole: Synthesis and Docking Studies. ACS OMEGA 2023; 8:9785-9796. [PMID: 36969428 PMCID: PMC10035015 DOI: 10.1021/acsomega.2c05782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Accepted: 03/01/2023] [Indexed: 06/18/2023]
Abstract
2-Mercaptobenzothiazole and its derivatives are widely known for their diverse biological activities, particularly antimicrobial and anticancer potential. In the present study, a series of new hybrid compounds consisting of 2-mercaptobenzothiazole and different aryl amines 2(a-j) were synthesized and characterized by Fourier transform infrared (FTIR), 1H NMR, and 13C NMR spectral data. The synthesized compounds were screened for in vitro antibacterial activities through agar well diffusion assay. Among the series, 2b, 2c, and 2i exhibited significant antibacterial activity comparable to the standard drug levofloxacin. Based on their antibacterial potential, these compounds were further tested for their antibiofilm activity. All of the three compounds showed promising antibiofilm potential, even better than the standard drug cefadroxil at 100 μg/100 μL concentration. Molecular docking studies were performed to explore the antibacterial mechanism of these compounds. Strikingly, the molecule 2i shared the same hydrophobic pockets as those of levofloxacin in case of bacterial kinases and DNA gyrases. In addition, 2i exhibited satisfactory antibiofilm activity in comparison to the standard. Our study therefore suggested that the synthetic compound 2i possesses remarkable antibacterial activity and may serve as a lead molecule for the discovery of potent antibacterial agents.
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Affiliation(s)
- Ahmed
Sadiq Sheikh
- Department
of Pharmaceutical Chemistry, Riphah Institute of Pharmaceutical Sciences, Riphah International University, Islamabad 44000, Pakistan
| | - Humaira Nadeem
- Department
of Pharmaceutical Chemistry, Riphah Institute of Pharmaceutical Sciences, Riphah International University, Islamabad 44000, Pakistan
| | - Muhammad Tariq Khan
- Faculty
of Pharmacy, Capital University of Science
and Technology, Islamabad 44000, Pakistan
| | - Adil Saeed
- Department
of Pharmaceutical Chemistry, Riphah Institute of Pharmaceutical Sciences, Riphah International University, Islamabad 44000, Pakistan
| | - Babar Murtaza
- Department
of Pharmaceutical Chemistry, Riphah Institute of Pharmaceutical Sciences, Riphah International University, Islamabad 44000, Pakistan
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13
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Singh R, Kumar P, Sindhu J, Devi M, Kumar A, Lal S, Singh D. Parsing structural fragments of thiazolidin-4-one based α-amylase inhibitors: A combined approach employing in vitro colorimetric screening and GA-MLR based QSAR modelling supported by molecular docking, molecular dynamics simulation and ADMET studies. Comput Biol Med 2023; 157:106776. [PMID: 36947906 DOI: 10.1016/j.compbiomed.2023.106776] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 01/20/2023] [Accepted: 03/09/2023] [Indexed: 03/17/2023]
Abstract
α-Amylase (EC.3.2.1.1) is a ubiquitous digestive endoamylase. The abrupt rise in blood glucose levels due to the hydrolysis of carbohydrates by α-amylase at a faster rate is one of the main reasons for type 2 diabetes. The inhibitors prevent the action of digestive enzymes, slowing the digestion of carbs and eventually assisting in the management of postprandial hyperglycemia. In the course of developing α-amylase inhibitors, we have screened 2-aryliminothiazolidin-4-one based analogs for their in vitro α-amylase inhibitory potential and employed various in silico approaches for the detailed exploration of the bioactivity. The DNSA bioassay revealed that compounds 5c, 5e, 5h, 5j, 5m, 5o and 5t were more potent than the reference drug (IC60 value = 22.94 ± 0.24 μg mL-1). The derivative 5o with -NO2 group at both the rings was the most potent analog with an IC60 value of 19.67 ± 0.20 μg mL-1 whereas derivative 5a with unsubstituted aromatic rings showed poor inhibitory potential with an IC60 value of 33.40 ± 0.15 μg mL-1. The reliable QSAR models were developed using the QSARINS software. The high value of R2ext = 0.9632 for model IM-9 showed that the built model can be applied to predict the α-amylase inhibitory activity of the untested molecules. A consensus modelling approach was also employed to test the reliability and robustness of the developed QSAR models. Molecular docking and molecular dynamics were employed to validate the bioassay results by studying the conformational changes and interaction mechanisms. A step further, these compounds also exhibited good ADMET characteristics and bioavailability when tested for in silico pharmacokinetics prediction parameters.
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Affiliation(s)
- Rahul Singh
- Department of Chemistry, Kurukshetra University, Kurukshetra, 136119, India
| | - Parvin Kumar
- Department of Chemistry, Kurukshetra University, Kurukshetra, 136119, India.
| | - Jayant Sindhu
- Department of Chemistry, COBS&H, CCS Haryana Agricultural University, Hisar, 125004, India
| | - Meena Devi
- Department of Chemistry, Kurukshetra University, Kurukshetra, 136119, India
| | - Ashwani Kumar
- Department of Pharmaceutical Sciences, GJUS&T, Hisar, 125001, India
| | - Sohan Lal
- Department of Chemistry, Kurukshetra University, Kurukshetra, 136119, India
| | - Devender Singh
- Department of Chemistry, Maharshi Dayanand University, Rohtak, 124001, India
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14
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Haroun M, Petrou A, Tratrat C, Kositsi K, Gavalas A, Geronikaki A, Venugopala KN, Harsha NS. Discovery of benzothiazole-based thiazolidinones as potential anti-inflammatory agents: anti-inflammatory activity, soybean lipoxygenase inhibition effect and molecular docking studies. SAR AND QSAR IN ENVIRONMENTAL RESEARCH 2022; 33:485-497. [PMID: 35703013 DOI: 10.1080/1062936x.2022.2084772] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Accepted: 05/29/2022] [Indexed: 06/15/2023]
Abstract
Despite the greatest achievement in the development of anti-inflammatory agents in the last two decades, the current clinical drugs suffer from a variety of complications in community settings and hospital. There is still an urgent need to design novel molecules with better safety profile and with different molecular targets from those in current clinical use. The aim of this research was to discover a series of benzothiazole-based thiazolidinones with lipoxygenase (LOX) inhibitory activity as a mechanism of anti-inflammatory action. Carrageenan-induced mouse foot paw oedema assay was carried out to determine the anti-inflammatory activity, while LOX inhibition was examined through the conversion of sodium linoleate to 13-hydroperoxylinoleic acid. Molecular docking studies were performed using AutoDock 4.2 software. The anti-inflammatory activity of the title compounds was determined in a range of 18.4%-69.57%, where compound #3 was found to be the most potent (69.57%) and also to be more active than the reference drug indomethacin (47%). Moreover, compound #3 showed the highest LOX inhibitory activity with IC50 of 13 μM being less potent to that of the reference NDGA (IC50 = 1.3 μM). Compound #3 has been identified as lead compound for further modification in an attempt to improve anti-inflammatory and LOX inhibitory activities.
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Affiliation(s)
- M Haroun
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa, Saudi Arabia
| | - A Petrou
- School of Pharmacy, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - C Tratrat
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa, Saudi Arabia
| | - K Kositsi
- School of Pharmacy, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - A Gavalas
- School of Pharmacy, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - A Geronikaki
- School of Pharmacy, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - K N Venugopala
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa, Saudi Arabia
- Department of Biotechnology and Food Technology, Faculty of Applied Sciences, Durban University of Technology, Durban, South Africa
| | - N S Harsha
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa, Saudi Arabia
- Department of Pharmaceutics, Vidya Siri College of Pharmacy, Bangalore, India
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