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Parthiban D, Kuppusamy MR, Vanitha C, Gomathi A, Suraksha D. Mangrove tree aerial root extract mediated green synthesis of Ag/Fe 3O 4/rGO nanocomposite and its application as a catalyst for one pot synthesis of 7-phenyl-6H,7H-benzo[4,5]imidazo[2,1-b]chromeno[4,3-d][1,3]thiazin-6-one derivatives. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024:10.1007/s11356-024-35126-4. [PMID: 39358656 DOI: 10.1007/s11356-024-35126-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2024] [Accepted: 09/19/2024] [Indexed: 10/04/2024]
Abstract
In this study, we report the green preparation of magnetically separable Ag/Fe3O4/rGO nanocomposites using mangrove tree aerial root extract as a stabilising agent. The morphology, size, chemical composition, magnetic property and other characteristic parameters of synthesised Ag/Fe3O4/rGO nanocomposite were determined by analytical techniques like Fourier-transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and vibrating sample magnetometer (VSM). The results proved that mangrove tree aerial root extract has the ability to reduce Ag+ ions, graphene oxide (GO) to Ag nanoparticle and reduced graphene oxide (rGO), respectively. The prepared Ag/Fe3O4/rGO nanocomposite was used successfully as a prompt catalyst for synthesis of 7-phenyl-6H,7H-benzo[4,5]imidazo[2,1-b]chromeno[4,3-d][1,3]thiazin-6-one derivatives by one-pot multi-component reaction of 4-hydroxycoumarin (10 mmol), 2-mercaptobenzimidazole (10 mmol) and different arylaldehyde (10 mmol) in the presence of ethanol (10 ml) as an eco-benign solvent at reflux condition. By utilising this protocol, we have constructed 7-phenyl-6H,7H-benzo[4,5]imidazo[2,1-b]chromeno[4,3-d][1,3]thiazin-6-one derivatives in good to excellent yield of 80-90%. This synthesis involves the formation of C-C, C-N and C-S bonds. The synthesised organic heterocyclic compounds were examined for the green matrix properties such as atom economy (AE), E-factor and product mass intensity (PMI). This green protocol is of big interest due to employing simple, non-toxic heterogeneous, separable, reusable Ag/Fe3O4/rGO as an eco-safe heterogeneous catalyst and environmentally benign ethanol as a green solvent without the use of any harmful mineral acid and toxic transition metal catalyst.
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Affiliation(s)
- Devendiran Parthiban
- PG & Research Department of Chemistry, Rajeshwari Vedachalam Government Arts College, Chengalpattu, 603001, Tamilnadu, India
| | - Muniyan Ramasamy Kuppusamy
- PG & Research Department of Chemistry, Rajeshwari Vedachalam Government Arts College, Chengalpattu, 603001, Tamilnadu, India
| | - Chinnaswamy Vanitha
- PG & Research Department of Chemistry, Rajeshwari Vedachalam Government Arts College, Chengalpattu, 603001, Tamilnadu, India
| | - Ayyanan Gomathi
- PG & Research Department of Chemistry, Rajeshwari Vedachalam Government Arts College, Chengalpattu, 603001, Tamilnadu, India
| | - Dhanasekaran Suraksha
- PG & Research Department of Chemistry, Rajeshwari Vedachalam Government Arts College, Chengalpattu, 603001, Tamilnadu, India.
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Rodríguez-Villar K, Cortés-Benítez F, Palacios-Espinosa JF, Pérez-Villanueva J. Similarity searching for anticandidal agents employing a repurposing approach. Mol Inform 2024; 43:e202300206. [PMID: 38095132 DOI: 10.1002/minf.202300206] [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: 08/14/2023] [Revised: 12/01/2023] [Accepted: 12/11/2023] [Indexed: 01/05/2024]
Abstract
Fungal infections caused by Candida are still a public health concern. Particularly, the resistance to traditional chemotherapeutic agents is a major issue that requires efforts to develop new therapies. One of the most interesting approaches to finding new active compounds is drug repurposing aided by computational methods. In this work, two databases containing anticandidal agents and drugs were studied employing cheminformatics and compared by similarity methods. The results showed 36 drugs with high similarities to some candicidals. From these drugs, trimetozin, osalmid and metochalcone were evaluated against C. albicans (18804), C. glabrata (90030), and miconazole-resistant strain C. glabrata (32554). Osalmid and metochalcone were the best, with activity in the micromolar range. These findings represent an opportunity to continue with the research on the potential antifungal application of osalmid and metochalcone as well as the design of structurally related derivatives.
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Affiliation(s)
- Karen Rodríguez-Villar
- Departamento de Sistemas Biológicos, División de Ciencias Biológicas y de la Salud, Universidad Autónoma Metropolitana-Xochimilco (UAM-X), Calzada del Hueso 1100, Col. Villa Quietud, Delegación Coyoacán, Ciudad de México, 04960, Mexico
| | - Francisco Cortés-Benítez
- Departamento de Sistemas Biológicos, División de Ciencias Biológicas y de la Salud, Universidad Autónoma Metropolitana-Xochimilco (UAM-X), Calzada del Hueso 1100, Col. Villa Quietud, Delegación Coyoacán, Ciudad de México, 04960, Mexico
| | - Juan Francisco Palacios-Espinosa
- Departamento de Sistemas Biológicos, División de Ciencias Biológicas y de la Salud, Universidad Autónoma Metropolitana-Xochimilco (UAM-X), Calzada del Hueso 1100, Col. Villa Quietud, Delegación Coyoacán, Ciudad de México, 04960, Mexico
| | - Jaime Pérez-Villanueva
- Departamento de Sistemas Biológicos, División de Ciencias Biológicas y de la Salud, Universidad Autónoma Metropolitana-Xochimilco (UAM-X), Calzada del Hueso 1100, Col. Villa Quietud, Delegación Coyoacán, Ciudad de México, 04960, Mexico
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Zhang T, Xing S, Du J, Xia J, Dong S, Li Z, Liu Z, Song Y. Discovery of novel TLR4/MD-2 inhibitors: Receptor structure-based virtual screening studies and anti-inflammatory evaluation. Bioorg Chem 2023; 141:106880. [PMID: 37783098 DOI: 10.1016/j.bioorg.2023.106880] [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: 07/17/2023] [Revised: 09/20/2023] [Accepted: 09/21/2023] [Indexed: 10/04/2023]
Abstract
In this study, a receptor structure-based virtual screening strategy was constructed using a computer-aided drug design. First, the compounds were filtered based on the Lipinski pentad and adsorption, distribution, metabolism, excretion, and toxicity profiles. Then, receptor structure-based pharmacophore models were constructed and screened. Finally, the in vitro toxicity and anti-inflammatory activities of hit compounds were initially evaluated to investigate their in vitro anti-inflammatory effects and mechanisms of action. The results revealed that hit 94 had the best anti-inflammatory activity and low toxicity while inhibiting the activation of Toll-like receptor (TLR) 4/myeloid differentiation factor 2 (MD2)-associated signaling pathways of nuclear factor-κB and mitogen-activated protein kinase. In vivo adjuvant arthritis results also revealed that hit 94 ameliorated foot swelling to a greater extent in rats compared with the positive control drug indomethacin. These results suggest that hit 94 can be used as a potential TLR/MD2 inhibitor for inflammatory diseases.
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Affiliation(s)
- Tengyue Zhang
- Department of Oncology, Anhui Provincial Cancer Hospital, West Branch of the First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230001, China; Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei 230000, China
| | - Siqi Xing
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei 230000, China; The Affiliated Suqian First People's Hospital of Nanjing Medical University, SuQian 223800, China
| | - Jiyu Du
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei 230000, China
| | - Jucheng Xia
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei 230000, China
| | - Shuanghong Dong
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei 230000, China
| | - Zeng Li
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei 230000, China.
| | - Zhicheng Liu
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei 230000, China.
| | - Yang Song
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei 230000, China; Department of Pain, The First Affiliated Hospital of Anhui Medical University, Anhui Medical Uiversity, Hefei 230032, China.
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Aliagas I, Gobbi A, Lee ML, Sellers BD. Comparison of logP and logD correction models trained with public and proprietary data sets. J Comput Aided Mol Des 2022; 36:253-262. [PMID: 35359246 DOI: 10.1007/s10822-022-00450-9] [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: 10/05/2021] [Accepted: 03/15/2022] [Indexed: 10/18/2022]
Abstract
In drug discovery, partition and distribution coefficients, logP and logD for octanol/water, are widely used as metrics of the lipophilicity of molecules, which in turn have a strong influence on the bioactivity and bioavailability of potential drugs. There are a variety of established methods, mostly fragment or atom-based, to calculate logP while logD prediction generally relies on calculated logP and pKa for the estimation of neutral and ionized populations at a given pH. Algorithms such as ClogP have limitations generally leading to systematic errors for chemically related molecules while pKa estimation is generally more difficult due to the interplay of electronic, inductive and conjugation effects for ionizable moieties. We propose an integrated machine learning QSAR modeling approach to predict logD by training the model with experimental data while using ClogP and pKa predicted by commercial software as model descriptors. By optimizing the loss function for the ClogD calculated by the software, we build a correction model that incorporates both descriptors from the software and available experimental logD data. Additionally, we calculate logP from the logD model using the software predicted pKa's. Here, we have trained models using publicly or commercial available logD data to show that this approach can improve on commercial software predictions of lipophilicity. When applied to other logD data sets, this approach extends the domain of applicability of logD and logP predictions over commercial software. Performance of these models favorably compare with models built with a larger set of proprietary logD data.
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Affiliation(s)
- Ignacio Aliagas
- Discovery Chemistry, Genentech Inc, 1 DNA Way, South San Francisco, CA, 94080, USA.
| | - Alberto Gobbi
- Discovery Chemistry, Genentech Inc, 1 DNA Way, South San Francisco, CA, 94080, USA
| | - Man-Ling Lee
- Discovery Chemistry, Genentech Inc, 1 DNA Way, South San Francisco, CA, 94080, USA
| | - Benjamin D Sellers
- Discovery Chemistry, Genentech Inc, 1 DNA Way, South San Francisco, CA, 94080, USA
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de Menezes RPB, Viana JDO, Muratov E, Scotti L, Scotti MT. Computer-Assisted Discovery of Alkaloids with Schistosomicidal Activity. Curr Issues Mol Biol 2022; 44:383-408. [PMID: 35723407 PMCID: PMC8929062 DOI: 10.3390/cimb44010028] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 01/08/2022] [Accepted: 01/09/2022] [Indexed: 11/28/2022] Open
Abstract
Schistosomiasis is a chronic parasitic disease caused by trematodes of the genus Schistosoma; it is commonly caused by Schistosoma mansoni, which is transmitted by Bioamphalaria snails. Studies show that more than 200 million people are infected and that more than 90% of them live in Africa. Treatment with praziquantel has the best cost–benefit result on the market. However, hypersensitivity, allergy, and drug resistance are frequently presented after administration. From this perspective, ligand-based and structure-based virtual screening (VS) techniques were combined to select potentially active alkaloids against S. mansoni from an internal dataset (SistematX). A set of molecules with known activity against S. mansoni was selected from the ChEMBL database to create two different models with accuracy greater than 84%, enabling ligand-based VS of the alkaloid bank. Subsequently, structure-based VS was performed through molecular docking using four targets of the parasite. Finally, five consensus hits (i.e., five alkaloids with schistosomicidal potential), were selected. In addition, in silico evaluations of the metabolism, toxicity, and drug-like profile of these five selected alkaloids were carried out. Two of them, namely, 11,12-methylethylenedioxypropoxy and methyl-3-oxo-12-methoxy-n(1)-decarbomethoxy-14,15-didehydrochanofruticosinate, had plausible toxicity, metabolomics, and toxicity profiles. These two alkaloids could serve as starting points for the development of new schistosomicidal compounds based on natural products.
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Affiliation(s)
- Renata Priscila Barros de Menezes
- Post-Graduate Program in Natural Synthetic Bioactive Products, Federal University of Paraiba, João Pessoa 58051-900, PB, Brazil; (R.P.B.d.M.); (J.d.O.V.); (L.S.)
| | - Jéssika de Oliveira Viana
- Post-Graduate Program in Natural Synthetic Bioactive Products, Federal University of Paraiba, João Pessoa 58051-900, PB, Brazil; (R.P.B.d.M.); (J.d.O.V.); (L.S.)
| | - Eugene Muratov
- Laboratory for Molecular Modeling, Division of Chemical Biology and Medicinal Chemistry, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599, USA;
| | - Luciana Scotti
- Post-Graduate Program in Natural Synthetic Bioactive Products, Federal University of Paraiba, João Pessoa 58051-900, PB, Brazil; (R.P.B.d.M.); (J.d.O.V.); (L.S.)
| | - Marcus Tullius Scotti
- Post-Graduate Program in Natural Synthetic Bioactive Products, Federal University of Paraiba, João Pessoa 58051-900, PB, Brazil; (R.P.B.d.M.); (J.d.O.V.); (L.S.)
- Correspondence: ; Tel.: +55-83-998690415
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Loderstädt U, Frickmann H. Antimicrobial resistance of the enteric protozoon Giardia duodenalis - A narrative review. Eur J Microbiol Immunol (Bp) 2021; 11:29-43. [PMID: 34237023 PMCID: PMC8287975 DOI: 10.1556/1886.2021.00009] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Accepted: 06/17/2021] [Indexed: 12/15/2022] Open
Abstract
Introduction As therapy-refractory giardiasis is an emerging health issue, this review aimed at summarizing mechanisms of reduced antimicrobial susceptibility in Giardia duodenalis and strategies to overcome this problem. Methods A narrative review on antimicrobial resistance in G. duodenalis was based upon a selective literature research. Results Failed therapeutic success has been observed for all standard therapies of giardiasis comprising nitroimidazoles like metronidazole or tinidazole as first line substances but also benznidazoles like albendazole and mebendazole, the nitrofuran furazolidone, the thiazolide nitazoxanide, and the aminoglycoside paromomycin. Multicausality of the resistance phenotypes has been described, with differentiated gene expression due to epigenetic and post-translational modifications playing a considerable bigger role than mutational base exchanges in the parasite DNA. Standardized resistance testing algorithms are not available and clinical evidence for salvage therapies is scarce in spite of research efforts targeting new giardicidal drugs. Conclusion In case of therapeutic failure of first line nitroimidazoles, salvage strategies including various options for combination therapy exist in spite of limited evidence and lacking routine diagnostic-compatible assays for antimicrobial susceptibility testing in G. duodenalis. Sufficiently powered clinical and diagnostic studies are needed to overcome both the lacking evidence regarding salvage therapy and the diagnostic neglect of antimicrobial resistance.
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Affiliation(s)
- Ulrike Loderstädt
- 1Institute for Infection Control and Infectious Diseases, University Medical Center Göttingen, 37075 Göttingen, Germany
| | - Hagen Frickmann
- 2Department of Microbiology and Hospital Hygiene, Bundeswehr Hospital Hamburg, 20359 Hamburg, Germany.,3Institute for Medical Microbiology, Virology and Hygiene, University Medicine Rostock, 18057 Rostock, Germany
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