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Zahedifard F, Bansal M, Sharma N, Kumar S, Shen S, Singh P, Rathi B, Zoltner M. Phenotypic screening reveals a highly selective phthalimide-based compound with antileishmanial activity. PLoS Negl Trop Dis 2024; 18:e0012050. [PMID: 38527083 PMCID: PMC10994559 DOI: 10.1371/journal.pntd.0012050] [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: 12/01/2023] [Revised: 04/04/2024] [Accepted: 03/05/2024] [Indexed: 03/27/2024] Open
Abstract
Pharmacophores such as hydroxyethylamine (HEA) and phthalimide (PHT) have been identified as potential synthons for the development of compounds against various parasitic infections. In order to further advance our progress, we conducted an experiment utilising a collection of PHT and HEA derivatives through phenotypic screening against a diverse set of protist parasites. This approach led to the identification of a number of compounds that exhibited significant effects on the survival of Entamoeba histolytica, Trypanosoma brucei, and multiple life-cycle stages of Leishmania spp. The Leishmania hits were pursued due to the pressing necessity to expand our repertoire of reliable, cost-effective, and efficient medications for the treatment of leishmaniases. Antileishmanials must possess the essential capability to efficiently penetrate the host cells and their compartments in the disease context, to effectively eliminate the intracellular parasite. Hence, we performed a study to assess the effectiveness of eradicating L. infantum intracellular amastigotes in a model of macrophage infection. Among eleven L. infantum growth inhibitors with low-micromolar potency, PHT-39, which carries a trifluoromethyl substitution, demonstrated the highest efficacy in the intramacrophage assay, with an EC50 of 1.2 +/- 3.2 μM. Cytotoxicity testing of PHT-39 in HepG2 cells indicated a promising selectivity of over 90-fold. A chemogenomic profiling approach was conducted using an orthology-based method to elucidate the mode of action of PHT-39. This genome-wide RNA interference library of T. brucei identified sensitivity determinants for PHT-39, which included a P-type ATPase that is crucial for the uptake of miltefosine and amphotericin, strongly indicating a shared route for cellular entry. Notwithstanding the favourable properties and demonstrated efficacy in the Plasmodium berghei infection model, PHT-39 was unable to eradicate L. major infection in a murine infection model of cutaneous leishmaniasis. Currently, PHT-39 is undergoing derivatization to optimize its pharmacological characteristics.
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Affiliation(s)
- Farnaz Zahedifard
- Drug Discovery and Evaluation Unit, Department of Parasitology, Faculty of Science, Charles University in Prague, Biocev, Vestec, Czech Republic
| | - Meenakshi Bansal
- H. G. Khorana Centre for Chemical Biology, Department of Chemistry, Hansraj College, University of Delhi, Delhi, India
- Department of Chemistry, Deenbandhu Chhotu Ram, University of Science & Technology, Murthal, Sonepat Haryana, India
| | - Neha Sharma
- H. G. Khorana Centre for Chemical Biology, Department of Chemistry, Hansraj College, University of Delhi, Delhi, India
| | - Sumit Kumar
- Department of Chemistry, Deenbandhu Chhotu Ram, University of Science & Technology, Murthal, Sonepat Haryana, India
| | - Siqi Shen
- Drug Discovery and Evaluation Unit, Department of Parasitology, Faculty of Science, Charles University in Prague, Biocev, Vestec, Czech Republic
| | - Priyamvada Singh
- Department of Chemistry, Miranda House, University of Delhi, Delhi, India
- Delhi School of Public Health, Institution of Eminence, University of Delhi, Delhi, India
| | - Brijesh Rathi
- H. G. Khorana Centre for Chemical Biology, Department of Chemistry, Hansraj College, University of Delhi, Delhi, India
- Delhi School of Public Health, Institution of Eminence, University of Delhi, Delhi, India
| | - Martin Zoltner
- Drug Discovery and Evaluation Unit, Department of Parasitology, Faculty of Science, Charles University in Prague, Biocev, Vestec, Czech Republic
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2
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The Multistage Antimalarial Compound Calxinin Perturbates P. falciparum Ca2+ Homeostasis by Targeting a Unique Ion Channel. Pharmaceutics 2022; 14:pharmaceutics14071371. [PMID: 35890267 PMCID: PMC9319510 DOI: 10.3390/pharmaceutics14071371] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 05/30/2022] [Accepted: 06/07/2022] [Indexed: 12/22/2022] Open
Abstract
Malaria elimination urgently needs novel antimalarial therapies that transcend resistance, toxicity, and high costs. Our multicentric international collaborative team focuses on developing multistage antimalarials that exhibit novel mechanisms of action. Here, we describe the design, synthesis, and evaluation of a novel multistage antimalarial compound, ‘Calxinin’. A compound that consists of hydroxyethylamine (HEA) and trifluoromethyl-benzyl-piperazine. Calxinin exhibits potent inhibitory activity in the nanomolar range against the asexual blood stages of drug-sensitive (3D7), multidrug-resistant (Dd2), artemisinin-resistant (IPC4912), and fresh Kenyan field isolated Plasmodium falciparum strains. Calxinin treatment resulted in diminished maturation of parasite sexual precursor cells (gametocytes) accompanied by distorted parasite morphology. Further, in vitro liver-stage testing with a mouse model showed reduced parasite load at an IC50 of 79 nM. A single dose (10 mg/kg) of Calxinin resulted in a 30% reduction in parasitemia in mice infected with a chloroquine-resistant strain of the rodent parasite P. berghei. The ex vivo ookinete inhibitory concentration within mosquito gut IC50 was 150 nM. Cellular in vitro toxicity assays in the primary and immortalized human cell lines did not show cytotoxicity. A computational protein target identification pipeline identified a putative P. falciparum membrane protein (Pf3D7_1313500) involved in parasite calcium (Ca2+) homeostasis as a potential Calxinin target. This highly conserved protein is related to the family of transient receptor potential cation channels (TRP-ML). Target validation experiments showed that exposure of parasitized RBCs (pRBCs) to Calxinin induces a rapid release of intracellular Ca2+ from pRBCs; leaving de-calcinated parasites trapped in RBCs. Overall, we demonstrated that Calxinin is a promising antimalarial lead compound with a novel mechanism of action and with potential therapeutic, prophylactic, and transmission-blocking properties against parasites resistant to current antimalarials.
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Singh V, Hada RS, Jain R, Vashistha M, Kumari G, Singh S, Sharma N, Bansal M, Poonam, Zoltner M, Caffrey CR, Rathi B, Singh S. Designing and development of phthalimides as potent anti-tubulin hybrid molecules against malaria. Eur J Med Chem 2022; 239:114534. [PMID: 35749989 DOI: 10.1016/j.ejmech.2022.114534] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 06/06/2022] [Accepted: 06/11/2022] [Indexed: 11/03/2022]
Abstract
Constant emergence of drug-resistant Plasmodium falciparum warrants urgent need for effective and inexpensive drugs. Herein, phthalimide (Pht) analogs possessing the bioactive scaffolds, benzimidazole and 1,2,3-triazole, were evaluated for in vitro and in vivo anti-plasmodial activity without any apparent hemolysis, or cytotoxicity. Analogs 4(a-e) inhibited the growth of 3D7 and RKL-9 strains at submicromolar concentrations. Defects were observed during parasite egress from or invasion of the red blood cells. Mitochondrial membrane depolarization was measured as one of the causes of cell death. Phts 4(a-e) in combination with artemisinin exhibited two-to three-fold increased efficacy. Biophysical and biochemical analysis suggest that Pht analogs mediate plasmodial growth inhibition by interacting with tubulin protein of the parasite. Lastly, Phts 4(a-e) significantly decreased parasitemia and extended host survival in murine model Plasmodium berghei ANKA infection. Combined, the data indicate that Pht analogs should be further explored, which could offer novel value to the antimalarial drug development pipeline.
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Affiliation(s)
- Vigyasa Singh
- Special Centre for Molecular Medicine, Jawaharlal Nehru University, New Delhi, 110067, India
| | - Rahul Singh Hada
- Department of Life Sciences, Shiv Nadar University, Gautam Buddha Nagar, UP, 201314, India
| | - Ravi Jain
- Special Centre for Molecular Medicine, Jawaharlal Nehru University, New Delhi, 110067, India
| | - Manu Vashistha
- Advanced Instrumentation Research Facility, Jawaharlal Nehru University, New Delhi, 110067, India
| | - Geeta Kumari
- Special Centre for Molecular Medicine, Jawaharlal Nehru University, New Delhi, 110067, India
| | - Snigdha Singh
- Laboratory for Translational Chemistry and Drug Discovery, Department of Chemistry, Hansraj College, University of Delhi, Delhi, 110007, India
| | - Neha Sharma
- Laboratory for Translational Chemistry and Drug Discovery, Department of Chemistry, Hansraj College, University of Delhi, Delhi, 110007, India
| | - Meenakshi Bansal
- Laboratory for Translational Chemistry and Drug Discovery, Department of Chemistry, Hansraj College, University of Delhi, Delhi, 110007, India
| | - Poonam
- Department of Chemistry, Miranda House, University of Delhi, Delhi, 110007, India; Delhi School of Public Health, Institute of Eminence, University of Delhi, Delhi, 110007, India
| | - Martin Zoltner
- Drug Discovery and Evaluation Unit, Department of Parasitology, Faculty of Science, Charles University, BIOCEV, Vestec, Czech Republic
| | - Conor R Caffrey
- Center for Discovery and Innovation in Parasitic Diseases, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, 9500 Gilman Drive, La Jolla, CA, 92093, USA
| | - Brijesh Rathi
- Laboratory for Translational Chemistry and Drug Discovery, Department of Chemistry, Hansraj College, University of Delhi, Delhi, 110007, India; Delhi School of Public Health, Institute of Eminence, University of Delhi, Delhi, 110007, India.
| | - Shailja Singh
- Special Centre for Molecular Medicine, Jawaharlal Nehru University, New Delhi, 110067, India.
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4
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Mandal RD, Saha M, Das AR. Accessing oxy-functionalized N-heterocycles through rose bengal and TBHP integrated photoredox C(sp 3)–O cross-coupling. Org Biomol Chem 2022; 20:2939-2963. [DOI: 10.1039/d2ob00381c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A C(sp3)–O coupling strategy is described involving tautomerizable N-heterocycles (phthalazinone, pyridne, pyrimidinone and quinoxalinone) carbonyl employing rose bengal as the photocatalyst and TBHP.
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Affiliation(s)
- Rahul Dev Mandal
- Department of Chemistry, University of Calcutta 92, A. P. C. Road, Kolkata-700009, India
| | - Moumita Saha
- Department of Chemistry, University of Calcutta 92, A. P. C. Road, Kolkata-700009, India
| | - Asish R. Das
- Department of Chemistry, University of Calcutta 92, A. P. C. Road, Kolkata-700009, India
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Upadhyay C, Sharma N, Kumar S, Sharma PP, Fontinha D, Chhikara BS, Mukherjee B, Kumar D, Prudencio M, Singh AP, Poonam. Synthesis of the new analogs of morpholine and their antiplasmodial evaluation against the human malaria parasite Plasmodium falciparum. NEW J CHEM 2022. [DOI: 10.1039/d1nj04198c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A series of morpholine analogs functionalized with hydroxyethylamine (HEA) pharmacophore was synthesized and assayed for the initial screening against Plasmodium falciparum 3D7 in culture, which suggested that analog 6k is a hit molecule with an inhibitory concentration of 5.059 ± 0.2036 μM.
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Affiliation(s)
- Charu Upadhyay
- Department of Chemistry, Miranda House, University of Delhi, Delhi, India
| | - Neha Sharma
- Laboratory for Translational Chemistry and Drug Discovery, Department of Chemistry, Hansraj College University Enclave, University of Delhi, Delhi 110007, India
| | - Sumit Kumar
- Department of Chemistry, Miranda House, University of Delhi, Delhi, India
| | - Prem Prakash Sharma
- Laboratory for Translational Chemistry and Drug Discovery, Department of Chemistry, Hansraj College University Enclave, University of Delhi, Delhi 110007, India
| | - Diana Fontinha
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Avenida Professor Egas Moniz, 1649-028 Lisboa, Portugal
| | | | - Budhaditya Mukherjee
- School of Medical Science and Technology, IIT Kharagpur, Kharagpur-721302, India
| | - Dhruv Kumar
- Amity Institute of Molecular Medicine & Stem Cell Research, Amity University Uttar Pradesh, Noida, India
| | - Miguel Prudencio
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Avenida Professor Egas Moniz, 1649-028 Lisboa, Portugal
| | - Agam P. Singh
- Infectious Diseases Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Poonam
- Department of Chemistry, Miranda House, University of Delhi, Delhi, India
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6
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Bansal M, Upadhyay C, Poonam, Kumar S, Rathi B. Phthalimide analogs for antimalarial drug discovery. RSC Med Chem 2021; 12:1854-1867. [PMID: 34825184 DOI: 10.1039/d1md00244a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Accepted: 08/03/2021] [Indexed: 11/21/2022] Open
Abstract
Malaria remains one of the world's most life-threatening diseases and, thus, it is a major public health concern all around the world. The disease can become devastating if not treated with proper medication in a timely manner. Currently, the number of viable treatment therapies is in continuous decline due to compromised effectiveness, probably owing to the complex life cycle of Plasmodium falciparum. The factors responsible for the unclear status of malaria eradication programmes include ever-developing parasite resistance to the most effective treatments used on the frontline (i.e., artemisinin derivatives) and the paucity of new effective therapeutics. Due to these circumstances, the development of novel effective drug candidates with unique modes of action is essential for overcoming the listed obstacles. As such, the discovery of novel chemical compounds based on validated pharmacophores remains an unmet need in the field of medicinal chemistry. In this area, functionalized phthalimide (Pht) analogs have been explored as potential candidates against various diseases, including malaria. Pht presents a promising bioactive scaffold that can be easily functionalized and thus utilized as a starting point for the development of new antimalarial candidates suitable for preclinical and clinical studies. In this short review, we highlight a wide range of Pht analogs that have been investigated for their activity against various strains of Plasmodium falciparum.
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Affiliation(s)
- Meenakshi Bansal
- Laboratory for Translational Chemistry and Drug Discovery, Department of Chemistry, Hansraj College University Enclave, University of Delhi Delhi 110007 India .,Department of Chemistry, Deenbandhu Chhotu Ram University of Science and Technology Murthal Sonepat-131039 Haryana India
| | - Charu Upadhyay
- Department of Chemistry, Miranda House, University of Delhi Delhi 110007 India
| | - Poonam
- Department of Chemistry, Miranda House, University of Delhi Delhi 110007 India
| | - Sumit Kumar
- Department of Chemistry, Deenbandhu Chhotu Ram University of Science and Technology Murthal Sonepat-131039 Haryana India
| | - Brijesh Rathi
- Laboratory for Translational Chemistry and Drug Discovery, Department of Chemistry, Hansraj College University Enclave, University of Delhi Delhi 110007 India
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7
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Gupta Y, Kumar S, Zak SE, Jones KA, Upadhyay C, Sharma N, Azizi SA, Kathayat RS, Poonam, Herbert AS, Durvasula R, Dickinson BC, Dye JM, Rathi B, Kempaiah P. Antiviral evaluation of hydroxyethylamine analogs: Inhibitors of SARS-CoV-2 main protease (3CLpro), a virtual screening and simulation approach. Bioorg Med Chem 2021; 47:116393. [PMID: 34509862 PMCID: PMC8416325 DOI: 10.1016/j.bmc.2021.116393] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 07/25/2021] [Accepted: 08/30/2021] [Indexed: 12/22/2022]
Abstract
The continued toll of COVID-19 has halted the smooth functioning of civilization on a global scale. With a limited understanding of all the essential components of viral machinery and the lack of structural information of this new virus, initial drug discovery efforts had limited success. The availability of high-resolution crystal structures of functionally essential SARS-CoV-2 proteins, including 3CLpro, supports the development of target-specific therapeutics. 3CLpro, the main protease responsible for the processing of viral polypeptide, plays a vital role in SARS-CoV-2 viral replication and translation and is an important target in other coronaviruses. Additionally, 3CLpro is the target of repurposed drugs, such as lopinavir and ritonavir. In this study, target proteins were retrieved from the protein data bank (PDB IDs: 6 M03, 6LU7, 2GZ7, 6 W63, 6SQS, 6YB7, and 6YVF) representing different open states of the main protease to accommodate macromolecular substrate. A hydroxyethylamine (HEA) library was constructed from harvested chemical structures from all the series being used in our laboratories for screening against malaria and Leishmania parasites. The database consisted of ∼1000 structure entries, of which 70% were new to ChemSpider at the time of screening. This in-house library was subjected to high throughput virtual screening (HTVS), followed by standard precision (SP) and then extra precision (XP) docking (Schrodinger LLC 2021). The ligand strain and complex energy of top hits were calculated by Molecular Mechanics Generalized Born Surface Area (MM/GBSA) method. Promising hit compounds (n = 40) specifically binding to 3CLpro with high energy and average MM/GBSA scores were then subjected to (100-ns) MD simulations. Using this sequential selection followed by an in-silico validation approach, we found a promising HEA-based compound (N,N'-((3S,3'S)-piperazine-1,4-diylbis(3-hydroxy-1-phenylbutane-4,2-diyl))bis(2-(5-methyl-1,3-dioxoisoindolin-2-yl)-3-phenylpropanamide)), which showed high in vitro antiviral activity against SARS-CoV-2. Further to reduce the size of the otherwise larger ligand, a pharmacophore-based predicted library of ∼42 derivatives was constructed, which were added to the previous compound library and rescreened virtually. Out of several hits from the predicted library, two compounds were synthesized, tested against SARS-CoV-2 culture, and found to have markedly improved antiviral activity.
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Affiliation(s)
- Yash Gupta
- Department of Infectious Diseases, Mayo Clinic, Jacksonville, FL, USA
| | - Sumit Kumar
- Department of Chemistry, Miranda House, University of Delhi, Delhi, India
| | - Samantha E Zak
- United States Army Medical Research Institute of Infectious Diseases, Fort Detrick, MD, USA; The Geneva Foundation, 917 Pacific Avenue, Tacoma, WA, USA
| | - Krysten A Jones
- Department of Chemistry, The University of Chicago, 5801 South Ellis Avenue, Chicago, IL, USA
| | - Charu Upadhyay
- Department of Chemistry, Miranda House, University of Delhi, Delhi, India
| | - Neha Sharma
- Laboratory for Translational Chemistry and Drug Discovery, Department of Chemistry, Hansraj College, University of Delhi, India
| | - Saara-Anne Azizi
- Department of Chemistry, The University of Chicago, 5801 South Ellis Avenue, Chicago, IL, USA
| | - Rahul S Kathayat
- Department of Chemistry, The University of Chicago, 5801 South Ellis Avenue, Chicago, IL, USA
| | - Poonam
- Department of Chemistry, Miranda House, University of Delhi, Delhi, India
| | - Andrew S Herbert
- United States Army Medical Research Institute of Infectious Diseases, Fort Detrick, MD, USA
| | - Ravi Durvasula
- Department of Infectious Diseases, Mayo Clinic, Jacksonville, FL, USA
| | - Bryan C Dickinson
- Department of Chemistry, The University of Chicago, 5801 South Ellis Avenue, Chicago, IL, USA
| | - John M Dye
- United States Army Medical Research Institute of Infectious Diseases, Fort Detrick, MD, USA; The Geneva Foundation, 917 Pacific Avenue, Tacoma, WA, USA.
| | - Brijesh Rathi
- Laboratory for Translational Chemistry and Drug Discovery, Department of Chemistry, Hansraj College, University of Delhi, India.
| | - Prakasha Kempaiah
- Department of Infectious Diseases, Mayo Clinic, Jacksonville, FL, USA.
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Sharma N, Kashif M, Singh V, Fontinha D, Mukherjee B, Kumar D, Singh S, Prudencio M, Singh AP, Rathi B. Novel Antiplasmodial Compounds Leveraged with Multistage Potency against the Parasite Plasmodium falciparum: In Vitro and In Vivo Evaluations and Pharmacokinetic Studies. J Med Chem 2021; 64:8666-8683. [PMID: 34124905 DOI: 10.1021/acs.jmedchem.1c00659] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Hydroxyethylamine (HEA)-based novel compounds were synthesized and their activity against Plasmodium falciparum 3D7 was assessed, identifying a few hits without any apparent toxicity. Hits 5c and 5d also exhibited activity against resistant field strains, PfRKL-9 and PfC580Y. A single dose, 50 mg/Kg, of hits administered to the rodent parasite Plasmodium berghei ANKA exhibited up to 70% reduction in the parasite load. Compound 5d tested in combination with artesunate produced an additional antiparasitic effect with a prolonged survival period. Additionally, compound 5d showed 50% inhibition against hepatic P. berghei infection at 1.56 ± 0.56 μM concentration. This compound also considerably delayed the progression of transmission stages, ookinete and oocyst. Furthermore, the toxicity of 5d assessed in mice supported the normal liver and kidney functions. Altogether, HEA analogues (5a-m), particularly 5d, are nontoxic multistage antiplasmodial agents with therapeutic and transmission-blocking efficacy, along with favorable preliminary pharmacokinetic properties.
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Affiliation(s)
- Neha Sharma
- Laboratory for Translational Chemistry and Drug Discovery, Department of Chemistry, Hansraj College University Enclave, University of Delhi, Delhi 110007, India
| | - Mohammad Kashif
- Infectious Diseases Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Vigyasa Singh
- Special Centre for Molecular Medicine, Jawaharlal Nehru University, New Delhi 110067, India
| | - Diana Fontinha
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Avenida Professor Egas Moniz, Lisboa 1649-028, Portugal
| | - Budhaditya Mukherjee
- School of Medical Science and Technology, IIT Kharagpur, Kharagpur 721302, India
| | - Dhruv Kumar
- Amity Institute of Molecular Medicine & Stem Cell Research, Amity University, Noida 201301, Uttar Pradesh, India
| | - Shailja Singh
- Special Centre for Molecular Medicine, Jawaharlal Nehru University, New Delhi 110067, India
| | - Miguel Prudencio
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Avenida Professor Egas Moniz, Lisboa 1649-028, Portugal
| | - Agam P Singh
- Infectious Diseases Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Brijesh Rathi
- Laboratory for Translational Chemistry and Drug Discovery, Department of Chemistry, Hansraj College University Enclave, University of Delhi, Delhi 110007, India
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Sharma PP, Kumar S, Kaushik K, Singh A, Singh IK, Grishina M, Pandey KC, Singh P, Potemkin V, Poonam, Singh G, Rathi B. In silico validation of novel inhibitors of malarial aspartyl protease, plasmepsin V and antimalarial efficacy prediction. J Biomol Struct Dyn 2021; 40:8352-8364. [PMID: 33870856 DOI: 10.1080/07391102.2021.1911855] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Plasmepsin V (Plm V) is an essential aspartic protease required for survival of the malaria parasite, Plasmodium falciparum (Pf). Plm V is required for cleaving the PEXEL motifs of many Pf proteins and its inhibition leads to a knockout effect, indicating its suitability as potential drug target. To decipher new inhibitors of PfPlm V, molecular docking of four HIV-1 protease inhibitors active against PfPlmV was performed on Glide module of Schrödinger suite that supported saquinavir as a lead drug, and therefore, selected as a control. Saquinavir contains an important hydroxyethylamine (HEA) pharmacophore, which was utilized as backbone coupled with piperazine scaffold to build new library of compounds. Newly designed HEA compounds were screened virtually against Plm V. Molecular docking led to a few hits (1 and 3) with higher docking score over the control drug. Notably, compound 1 showed the highest docking score (-11.90 kcal/mol) and XP Gscore (-11.948 kcal/mol). The Prime MMGBSA binding free energy for compound 1 (-60.88 kcal/mol) and 3 (-50.96 kcal/mol) was higher than saquinavir (-37.51 kcal/mol). The binding free energy for the last frame of molecular dynamic simulation supported compound 1 (-92.88 kcal/mol) as potent inhibitor of PfPlm V over saquinavir (-72.77 kcal/mol), and thus, deserves experimental validations in culture and subsequently in animal models.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Prem Prakash Sharma
- Department of Biomedical Engineering, Deenbandhu Chhotu Ram, University of Science & Technology, Murthal, Sonepat, Haryana, India.,Laboratory for Translational Chemistry and Drug Discovery, Department of Chemistry, Hansraj College, University of Delhi, Delhi, India
| | - Sumit Kumar
- Department of Chemistry, Miranda House, University of Delhi, Delhi, India
| | - Kumar Kaushik
- Centre for Fire, Explosives & Environment Safety, Fire Chemistry Group, Delhi, India
| | - Archana Singh
- Department of Botany, Hansraj College, University of Delhi, Delhi, India
| | - Indrakant K Singh
- Molecular Biology Research Lab., Department of Zoology, Deshbandhu College, University of Delhi, Delhi, India
| | - Maria Grishina
- Laboratory of Computational Modelling of Drugs, South Ural State University, Russia
| | - Kailash C Pandey
- Host-Parasite Interaction Biology Group, National Institute of Malaria Research, New Delhi, India
| | | | - Vladimir Potemkin
- Laboratory of Computational Modelling of Drugs, South Ural State University, Russia
| | - Poonam
- Department of Chemistry, Miranda House, University of Delhi, Delhi, India
| | - Geeta Singh
- Department of Biomedical Engineering, Deenbandhu Chhotu Ram, University of Science & Technology, Murthal, Sonepat, Haryana, India
| | - Brijesh Rathi
- Laboratory for Translational Chemistry and Drug Discovery, Department of Chemistry, Hansraj College, University of Delhi, Delhi, India.,Laboratory of Computational Modelling of Drugs, South Ural State University, Russia
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Huang G, Solano CM, Melendez J, Yu-Alfonzo S, Boonhok R, Min H, Miao J, Chakrabarti D, Yuan Y. Discovery of fast-acting dual-stage antimalarial agents by profiling pyridylvinylquinoline chemical space via copper catalyzed azide-alkyne cycloadditions. Eur J Med Chem 2020; 209:112889. [PMID: 33045660 DOI: 10.1016/j.ejmech.2020.112889] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 09/08/2020] [Accepted: 09/24/2020] [Indexed: 11/18/2022]
Abstract
To identity fast-acting, multistage antimalarial agents, a series of pyridylvinylquinoline-triazole analogues have been synthesized via CuAAC. Most of the compounds display significant inhibitory effect on the drug-resistant malarial Dd2 strain at low submicromolar concentrations. Among the tested analogues, compound 60 is the most potent molecule with an EC50 value of 0.04 ± 0.01 μM. Our current study indicates that compound 60 is a fast-acting antimalarial compound and it demonstrates stage specific action at the trophozoite phase in the P. falciparum asexual life cycle. In addition, compound 60 is active against both early and late stage P. falciparum gametocytes. From a mechanistic perspective, compound 60 shows good activity as an inhibitor of β-hematin formation. Collectively, our findings suggest that fast-acting agent 60 targets dual life stages of the malarial parasites and warrant further investigation of pyridylvinylquinoline hybrids as new antimalarials.
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Affiliation(s)
- Guang Huang
- Department of Chemistry, University of Central Florida, Orlando, FL, 32816, USA
| | - Claribel Murillo Solano
- Division of Molecular Microbiology, Burnett School of Biomedical Sciences, University of Central Florida, Orlando, FL, 32826, USA
| | - Joel Melendez
- Division of Molecular Microbiology, Burnett School of Biomedical Sciences, University of Central Florida, Orlando, FL, 32826, USA
| | - Sabrina Yu-Alfonzo
- Division of Molecular Microbiology, Burnett School of Biomedical Sciences, University of Central Florida, Orlando, FL, 32826, USA
| | - Rachasak Boonhok
- Department of Internal Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL, 33612, USA; Department of Medical Technology, School of Allied Health Science, Walailak University, Nakhon Si Thammarat, 80160, Thailand
| | - Hui Min
- Department of Internal Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL, 33612, USA
| | - Jun Miao
- Department of Internal Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL, 33612, USA
| | - Debopam Chakrabarti
- Division of Molecular Microbiology, Burnett School of Biomedical Sciences, University of Central Florida, Orlando, FL, 32826, USA.
| | - Yu Yuan
- Department of Chemistry, University of Central Florida, Orlando, FL, 32816, USA.
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11
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Kumar S, Upadhyay C, Bansal M, Grishina M, Chhikara BS, Potemkin V, Rathi B, Poonam. Experimental and Computational Studies of Microwave-Assisted, Facile Ring Opening of Epoxide with Less Reactive Aromatic Amines in Nitromethane. ACS OMEGA 2020; 5:18746-18757. [PMID: 32775876 PMCID: PMC7408245 DOI: 10.1021/acsomega.0c01760] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Accepted: 07/09/2020] [Indexed: 05/05/2023]
Abstract
Nucleophilic ring opening reactions of epoxides with aromatic amines are in the forefront of the synthetic organic chemistry research to build new bioactive scaffolds. Here, convenient, green, and highly efficient regioselective ring opening reactions of sterically hindered (2R,3S)-3-(N-Boc-amino)-1-oxirane-4-phenylbutane with various poorly reactive aromatic amines are accomplished under microwave irradiation in nitromethane. All the reactions effectively implemented for various aromatic amines involve the reuse of nitromethane that supports its dual role as a solvent and catalyst. The corresponding new β-alcohol analogs of hydroxyethylamine (HEA) are isolated in 41-98% yields. The reactions proceed under mild conditions for a broad range of less reactive and sterically hindered aromatic amines. Proton NMR experiments suggest that the nucleophilicity of amines is influenced by nitromethane, which is substantiated by the extensive computational studies. Overall, this methodology elucidates the first-time use of nitromethane as a solvent for the ring opening reactions under microwave conditions involving an equimolar ratio of epoxide and aromatic amine without any catalyst, facile ring opening of complex epoxide by less reactive aromatic amines, low reaction time, less energy consumption, recycling of the solvent, and simple workup procedures.
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Affiliation(s)
- Sumit Kumar
- Department
of Chemistry, Miranda House, University
of Delhi, Delhi 110007, India
| | - Charu Upadhyay
- Department
of Chemistry, Miranda House, University
of Delhi, Delhi 110007, India
| | - Meenakshi Bansal
- Laboratory
for Translational Chemistry and Drug Discovery, Department of Chemistry, Hansraj College University Enclave, University of Delhi, Delhi 110007, India
| | - Maria Grishina
- Laboratory
of Computational Modelling of Drugs, South
Ural State University, Chelyabinsk 454080, Russia
| | - Bhupender S. Chhikara
- Department
of Chemistry, Aditi Mahavidyalaya, University
of Delhi, Bawana, Delhi 110039, India
| | - Vladimir Potemkin
- Laboratory
of Computational Modelling of Drugs, South
Ural State University, Chelyabinsk 454080, Russia
| | - Brijesh Rathi
- Laboratory
for Translational Chemistry and Drug Discovery, Department of Chemistry, Hansraj College University Enclave, University of Delhi, Delhi 110007, India
- Laboratory
of Computational Modelling of Drugs, South
Ural State University, Chelyabinsk 454080, Russia
| | - Poonam
- Department
of Chemistry, Miranda House, University
of Delhi, Delhi 110007, India
- Laboratory
of Computational Modelling of Drugs, South
Ural State University, Chelyabinsk 454080, Russia
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12
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Shalini, Legac J, Adeniyi AA, Kisten P, Rosenthal PJ, Singh P, Kumar V. Functionalized Naphthalimide-4-aminoquinoline Conjugates as Promising Antiplasmodials, with Mechanistic Insights. ACS Med Chem Lett 2020; 11:154-161. [PMID: 32071682 DOI: 10.1021/acsmedchemlett.9b00521] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Accepted: 01/08/2020] [Indexed: 01/05/2023] Open
Abstract
A series of 25 conjugates has been synthesized to evaluate their antiplasmodial potency and cytotoxicity against the chloroquine resistant (CQR) W2 strain of P. falciparum and Vero kidney cell lines, respectively. Most of the compounds showed IC50 values in the lower nM range and proved to be many fold more active than chloroquine (CQ). The studies were extended to decipher modes of action using techniques including UV-vis absorption, NMR titrations, and mass spectrometry, and conclusions were strengthened by docking and density functional theory (DFT) simulations. The most active compound, with IC50 15 nM and selectivity index >4000, proved to be an interesting template for antimalarial drug discovery. To the best of our knowledge this is the first report of a potent naphthalimide based antiplasmodial conjugate.
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Affiliation(s)
- Shalini
- Department of Chemistry, Guru Nanak Dev University, Amritsar-143005, Punjab, India
| | - Jenny Legac
- Department of Medicine, University of California, San Francisco, California 94115, United States
| | - Adebayo A. Adeniyi
- Department of Industrial Chemistry, Federal University of Oye-Ekiti, Oye 371104, Nigeria
| | - Prishani Kisten
- School of Chemistry and Physics, University of KwaZulu-Natal, Westville, Durban-4000, South Africa
| | - Philip J. Rosenthal
- Department of Medicine, University of California, San Francisco, California 94115, United States
| | - Parvesh Singh
- School of Chemistry and Physics, University of KwaZulu-Natal, Westville, Durban-4000, South Africa
| | - Vipan Kumar
- Department of Chemistry, Guru Nanak Dev University, Amritsar-143005, Punjab, India
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13
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Synthesis and Bioactivity of Phthalimide Analogs as Potential Drugs to Treat Schistosomiasis, a Neglected Disease of Poverty. Pharmaceuticals (Basel) 2020; 13:ph13020025. [PMID: 32028743 PMCID: PMC7169845 DOI: 10.3390/ph13020025] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2019] [Revised: 01/16/2020] [Accepted: 01/17/2020] [Indexed: 12/23/2022] Open
Abstract
The neglected tropical disease, schistosomiasis, is caused by trematode blood flukes of the Schistosoma genus and infects approximately 200 million people worldwide. With just one partially effective drug available for disease treatment, new drugs are urgently needed. Herein, a series of 47 phthalimide (Pht) analogues possessing high-value bioactive scaffolds (i.e., benzimidazole and 1,2,3,-triazoles) was synthesized by click-chemistry. Compounds were evaluated for anti-schistosomal activity in culture against somules (post-infective larvae) and adults of Schistosoma mansoni, their predicted ADME (absorption, distribution, metabolism, and excretion) properties, and toxicity vs. HepG2 cells. The majority showed favorable parameters for surface area, lipophilicity, bioavailability and Lipinski score. Thirteen compounds were active at 10 µM against both somules and adults (6d, 6f, 6i–6l, 6n–6p, 6s, 6r’, 6t’ and 6w). Against somules, the majority caused degeneracy and/or death after 72 h; whereas against adult parasites, five compounds (6l, 6d, 6f, 6r’ and 6s) elicited degeneracy, tegumental (surface) damage and/or death. Strongest potency against both developmental stages was recorded for compounds possessing n-butyl or isobutyl as a linker, and a pentafluorophenyl group on triazole. Apart from five compounds for which anti-parasite activity tracked with toxicity to HepG2 cells, there was apparently no toxicity to HepG2 cells (EC50 values ≥50 µM). The data overall suggest that phthaloyl-triazole compounds are favorable synthons for additional studies as anti-schistosomals.
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14
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Sharma N, Gupta Y, Bansal M, Singh S, Pathak P, Shahbaaz M, Mathur R, Singh J, Kashif M, Grishina M, Potemkin V, Rajendran V, Poonam, Kempaiah P, Singh AP, Rathi B. Multistage antiplasmodial activity of hydroxyethylamine compounds, in vitro and in vivo evaluations. RSC Adv 2020; 10:35516-35530. [PMID: 35686031 PMCID: PMC9127639 DOI: 10.1039/d0ra03997g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Accepted: 08/11/2020] [Indexed: 12/19/2022] Open
Abstract
Malaria, a global threat to the human population, remains a challenge partly due to the fast-growing drug-resistant strains of Plasmodium species. New therapeutics acting against the pathogenic asexual and sexual stages, including liver-stage malarial infection, have now attained more attention in achieving malaria eradication efforts. In this paper, two previously identified potent antiplasmodial hydroxyethylamine (HEA) compounds were investigated for their activity against the malaria parasite's multiple life stages. The compounds exhibited notable activity against the artemisinin-resistant strain of P. falciparum blood-stage culture with 50% inhibitory concentrations (IC50) in the low micromolar range. The compounds' cytotoxicity on HEK293, HepG2 and Huh-7 cells exhibited selective killing activity with IC50 values > 170 μM. The in vivo efficacy was studied in mice infected with P. berghei NK65, which showed a significant reduction in the blood parasite load. Notably, the compounds were active against liver-stage infection, mainly compound 1 with an IC50 value of 1.89 μM. Mice infected with P. berghei sporozoites treated with compound 1 at 50 mg kg−1 dose had markedly reduced liver stage infection. Moreover, both compounds prevented ookinete maturation and affected the developmental progression of gametocytes. Further, systematic in silico studies suggested both the compounds have a high affinity towards plasmepsin II with favorable pharmacological properties. Overall, the findings demonstrated that HEA and piperidine possessing compounds have immense potential in treating malarial infection by acting as multistage inhibitors. Malaria, a global threat to the human population, remains a challenge partly due to the fast-growing drug-resistant strains of Plasmodium species.![]()
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15
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Xie R, Mei X, Ning J. Design, Synthesis and Insecticide Activity of Novel Acetylcholinesterase Inhibitors: Triazolinone and Phthalimide Heterodimers. Chem Pharm Bull (Tokyo) 2019; 67:345-350. [PMID: 30930439 DOI: 10.1248/cpb.c18-00704] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Based on the "cluster effect" and the structure characters of acetylcholinesterase (AChE; EC 3.1.1.7), a new series of 1,2,4-triazolin-3-one and phthalimide heterodimers were designed, synthesized, and evaluated as potent dual acetylcholinesterase inhibitors (AChEIs). Most of the synthesized compounds showed good in vitro inhibitory activities towards both Drosophila melanogaster acetylcholinesterase (DmAChE) and Musca domestica acetylcholinesterase (MdAChE). Among them, 5g was found to be the most potent anti-AChE derivate (5g, IC50 = 8.07 µM to DmAChE, IC50 = 32.24 µM to MdAChE). It was 2.31- and 1.35-fold more active than the positive control ethion (CP, IC50 = 18.62 µM to DmAChE, IC50 = 43.56 µM to MdAChE). The docking model study revealed that 5g possessed the fitted spatial structure and bound to the central pocket and peripheral site of DmAChE. Moreover, most compounds demonstrated high insecticidal activity to Lipaphis erysimi and Tetranychus cinnabarinus at the concentration of 300 mg/L.
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Affiliation(s)
- Ruliang Xie
- National Facility for Protein Science in Shanghai, Zhangjiang Lab
| | - Xiangdong Mei
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences
| | - Jun Ning
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences
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16
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Singh S, Rajendran V, He J, Singh AK, Achieng AO, Vandana, Pant A, Nasamu AS, Pandit M, Singh J, Quadiri A, Gupta N, Poonam, Ghosh PC, Singh BK, Narayanan L, Kempaiah P, Chandra R, Dunn BM, Pandey KC, Goldberg DE, Singh AP, Rathi B. Fast-Acting Small Molecules Targeting Malarial Aspartyl Proteases, Plasmepsins, Inhibit Malaria Infection at Multiple Life Stages. ACS Infect Dis 2019; 5:184-198. [PMID: 30554511 DOI: 10.1021/acsinfecdis.8b00197] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The eradication of malaria remains challenging due to the complex life cycle of Plasmodium and the rapid emergence of drug-resistant forms of Plasmodium falciparum and Plasmodium vivax. New, effective, and inexpensive antimalarials against multiple life stages of the parasite are urgently needed to combat the spread of malaria. Here, we synthesized a set of novel hydroxyethylamines and investigated their activities in vitro and in vivo. All of the compounds tested had an inhibitory effect on the blood stage of P. falciparum at submicromolar concentrations, with the best showing 50% inhibitory concentrations (IC50) of around 500 nM against drug-resistant P. falciparum parasites. These compounds showed inhibitory actions against plasmepsins, a family of malarial aspartyl proteases, and exhibited a marked killing effect on blood stage Plasmodium. In chloroquine-resistant Plasmodium berghei and P. berghei ANKA infected mouse models, treating mice with both compounds led to a significant decrease in blood parasite load. Importantly, two of the compounds displayed an inhibitory effect on the gametocyte stages (III-V) of P. falciparum in culture and the liver-stage infection of P. berghei both in in vitro and in vivo. Altogether, our findings suggest that fast-acting hydroxyethylamine-phthalimide analogs targeting multiple life stages of the parasite could be a valuable chemical lead for the development of novel antimalarial drugs.
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Affiliation(s)
- Snigdha Singh
- Laboratory for Translational Chemistry and Drug Discovery, Department of Chemistry, Hansraj College University Enclave, University of Delhi, Delhi 110007, India
- Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Vinoth Rajendran
- Department of Biochemistry, University of Delhi South Campus, New Delhi 110021, India
| | - Jiang He
- Institute for Medical Engineering and Science, Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Amit K. Singh
- Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Angela O. Achieng
- Center for Global Health, Department of Internal Medicine, University of New Mexico Health Sciences Center, Albuquerque, New Mexico 87131, United States
| | - Vandana
- Host−Parasite Interaction Biology Group, National Institute of Malaria Research, Lab. No. 219, Sector-8 Dwarka, New Delhi 110077, India
| | - Akansha Pant
- Host−Parasite Interaction Biology Group, National Institute of Malaria Research, Lab. No. 219, Sector-8 Dwarka, New Delhi 110077, India
| | - Armiyaw S. Nasamu
- Departments of Medicine and Molecular Microbiology, Washington University School of Medicine, St Louis, Missouri 63110, United States
| | - Mansi Pandit
- Bioinformatics Infrastructure Facility, Sri Venkateswara College, University of Delhi South Campus, New Delhi 110021, India
| | - Jyoti Singh
- Infectious Diseases Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Afshana Quadiri
- Infectious Diseases Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Nikesh Gupta
- Special Centre for Nanosciences, Jawaharlal Nehru University, New Delhi 110067, India
| | - Poonam
- Department of Chemistry, Miranda House, University of Delhi North Campus, Delhi 110007, India
| | - Prahlad C. Ghosh
- Department of Biochemistry, University of Delhi South Campus, New Delhi 110021, India
| | | | - Latha Narayanan
- Bioinformatics Infrastructure Facility, Sri Venkateswara College, University of Delhi South Campus, New Delhi 110021, India
| | - Prakasha Kempaiah
- Center for Global Health, Department of Internal Medicine, University of New Mexico Health Sciences Center, Albuquerque, New Mexico 87131, United States
- Department of Medicine, Loyola University Stritch School of Medicine, 2160 South First Avenue, Chicago, Illinois 60153, United States
| | - Ramesh Chandra
- Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Ben M. Dunn
- Department of Biochemistry & Molecular Biology, University of Florida College of Medicine, P.O. Box 100245, Gainesville, Florida 32610, United States
| | - Kailash C. Pandey
- Host−Parasite Interaction Biology Group, National Institute of Malaria Research, Lab. No. 219, Sector-8 Dwarka, New Delhi 110077, India
- Department of Biochemistry, National Institute for Research in Environmental Health, ICMR, Bhopal 462001, India
| | - Daniel E. Goldberg
- Departments of Medicine and Molecular Microbiology, Washington University School of Medicine, St Louis, Missouri 63110, United States
| | - Agam P. Singh
- Infectious Diseases Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Brijesh Rathi
- Laboratory for Translational Chemistry and Drug Discovery, Department of Chemistry, Hansraj College University Enclave, University of Delhi, Delhi 110007, India
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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17
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Okada-Junior C, Monteiro GC, Aguiar ACC, Batista VS, de Souza JO, Souza GE, Bueno RV, Oliva G, Nascimento-Júnior NM, Guido RVC, Bolzani VS. Phthalimide Derivatives with Bioactivity against Plasmodium falciparum: Synthesis, Evaluation, and Computational Studies Involving bc 1 Cytochrome Inhibition. ACS OMEGA 2018; 3:9424-9430. [PMID: 31459076 PMCID: PMC6644792 DOI: 10.1021/acsomega.8b01062] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/19/2018] [Accepted: 08/02/2018] [Indexed: 06/10/2023]
Abstract
We describe herein the design and synthesis of N-phenyl phthalimide derivatives with inhibitory activities against Plasmodium falciparum (sensitive and resistant strains) in the low micromolar range and noticeable selectivity indices against human cells. The best inhibitor, 4-amino-2-(4-methoxyphenyl)isoindoline-1,3-dione (10), showed a slow-acting mechanism similar to that of atovaquone. Enzymatic assay indicated that 10 inhibited P. falciparum cytochrome bc 1 complex. Molecular docking studies suggested the binding mode of the best hit to Qo site of the cytochrome bc 1 complex. Our findings suggest that 10 is a promising candidate for hit-to-lead development.
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Affiliation(s)
- Celso
Yassuo Okada-Junior
- Nuclei
of Bioassays, Biosynthesis and Ecophysiology of Natural Products
(NuBBE), Department of Organic Chemistry, Institute of Chemistry, and Laboratory of
Medicinal Chemistry, Organic Synthesis and Molecular Modeling (LaQMedSOMM),
Department of Organic Chemistry, Institute of Chemistry, São Paulo State University—UNESP, Rua Professor Francisco Degni, 55,
Jardim Quitandinha, 14800-060 Araraquara, São Paulo, Brazil
| | - Gustavo Claro Monteiro
- Nuclei
of Bioassays, Biosynthesis and Ecophysiology of Natural Products
(NuBBE), Department of Organic Chemistry, Institute of Chemistry, and Laboratory of
Medicinal Chemistry, Organic Synthesis and Molecular Modeling (LaQMedSOMM),
Department of Organic Chemistry, Institute of Chemistry, São Paulo State University—UNESP, Rua Professor Francisco Degni, 55,
Jardim Quitandinha, 14800-060 Araraquara, São Paulo, Brazil
| | - Anna Caroline Campos Aguiar
- Sao
Carlos Institute of Physics, University
of Sao Paulo, Av. Joao
Dagnone, 1100 Jardim Santa Angelina, Sao Carlos, São Paulo 13563-120, Brazil
| | - Victor Sousa Batista
- Nuclei
of Bioassays, Biosynthesis and Ecophysiology of Natural Products
(NuBBE), Department of Organic Chemistry, Institute of Chemistry, and Laboratory of
Medicinal Chemistry, Organic Synthesis and Molecular Modeling (LaQMedSOMM),
Department of Organic Chemistry, Institute of Chemistry, São Paulo State University—UNESP, Rua Professor Francisco Degni, 55,
Jardim Quitandinha, 14800-060 Araraquara, São Paulo, Brazil
| | - Juliana Oliveira de Souza
- Sao
Carlos Institute of Physics, University
of Sao Paulo, Av. Joao
Dagnone, 1100 Jardim Santa Angelina, Sao Carlos, São Paulo 13563-120, Brazil
| | - Guilherme Eduardo Souza
- Sao
Carlos Institute of Physics, University
of Sao Paulo, Av. Joao
Dagnone, 1100 Jardim Santa Angelina, Sao Carlos, São Paulo 13563-120, Brazil
| | - Renata Vieira Bueno
- Sao
Carlos Institute of Physics, University
of Sao Paulo, Av. Joao
Dagnone, 1100 Jardim Santa Angelina, Sao Carlos, São Paulo 13563-120, Brazil
| | - Glaucius Oliva
- Sao
Carlos Institute of Physics, University
of Sao Paulo, Av. Joao
Dagnone, 1100 Jardim Santa Angelina, Sao Carlos, São Paulo 13563-120, Brazil
| | - Nailton M. Nascimento-Júnior
- Nuclei
of Bioassays, Biosynthesis and Ecophysiology of Natural Products
(NuBBE), Department of Organic Chemistry, Institute of Chemistry, and Laboratory of
Medicinal Chemistry, Organic Synthesis and Molecular Modeling (LaQMedSOMM),
Department of Organic Chemistry, Institute of Chemistry, São Paulo State University—UNESP, Rua Professor Francisco Degni, 55,
Jardim Quitandinha, 14800-060 Araraquara, São Paulo, Brazil
| | - Rafael Victorio Carvalho Guido
- Sao
Carlos Institute of Physics, University
of Sao Paulo, Av. Joao
Dagnone, 1100 Jardim Santa Angelina, Sao Carlos, São Paulo 13563-120, Brazil
| | - Vanderlan Silva Bolzani
- Nuclei
of Bioassays, Biosynthesis and Ecophysiology of Natural Products
(NuBBE), Department of Organic Chemistry, Institute of Chemistry, and Laboratory of
Medicinal Chemistry, Organic Synthesis and Molecular Modeling (LaQMedSOMM),
Department of Organic Chemistry, Institute of Chemistry, São Paulo State University—UNESP, Rua Professor Francisco Degni, 55,
Jardim Quitandinha, 14800-060 Araraquara, São Paulo, Brazil
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18
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Raza M, Bharti H, Singal A, Nag A, Ghosh PC. Long circulatory liposomal maduramicin inhibits the growth of Plasmodium falciparum blood stages in culture and cures murine models of experimental malaria. NANOSCALE 2018; 10:13773-13791. [PMID: 29995025 DOI: 10.1039/c8nr02442a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Malaria continues to be one of the deadliest infectious diseases and a global health menace. The emergence and spread of drug-resistant strains of malaria parasites have further made the process of disease management grimmer. Thus, there is an urgent need to identify promising antimalarial strategies that can target the blood stages as well as block parasite transmission. Maduramicin is one such ionophore selected out of a recent screen of gametocytocidal compounds that exhibit potent antiplasmodial activity. However, maduramicin's strong hydrophobic nature and associated toxicity restrict its application in chemotherapy. To alleviate this problem, we have developed a liposomal formulation loaded with the ionophore maduramicin for the treatment of chloroquine sensitive and resistant Plasmodium infections. Here, we show that maduramicin in PEGylated liposomal formulations displayed enhanced antiplasmodial activity in vitro compared to free maduramicin. Significantly, four consecutive doses of 1.5 mg kg-1 body weight of PEGylated maduramicin loaded lipid vesicles completely cured cerebral and chloroquine resistant murine models of malaria without any obvious toxic effects and suppressed the key inflammatory markers associated with the progression of the disease. PEGylated liposomal maduramicin also exhibited a prolonged plasma clearance rate, implying a greater chance of interaction and uptake by infected RBCs. Furthermore, we also provide evidence that the detrimental effect of liposomal maduramicin on parasite survival is mediated by increased ROS generation and subsequent perturbation of parasite mitochondrial membrane potential. This study presents the first report to demonstrate the potent antimalarial efficacy of maduramicin liposomes, a strategy that holds promise for the development of successful therapeutic intervention against malaria in humans.
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Affiliation(s)
- Mohsin Raza
- Department of Biochemistry, University of Delhi South Campus, Benito Juarez Road, New Delhi-110021, India.
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19
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Kumar P, Achieng AO, Rajendran V, Ghosh PC, Singh BK, Rawat M, Perkins DJ, Kempaiah P, Rathi B. Synergistic blending of high-valued heterocycles inhibits growth of Plasmodium falciparum in culture and P. berghei infection in mouse model. Sci Rep 2017; 7:6724. [PMID: 28751747 PMCID: PMC5532363 DOI: 10.1038/s41598-017-06097-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Accepted: 06/07/2017] [Indexed: 11/09/2022] Open
Abstract
A series of phthalimide analogues, novelized with high-valued bioactive scaffolds was synthesized by means of click-chemistry under non-conventional microwave heating and evaluated as noteworthy growth inhibitors of Plasmodium falciparum (3D7 and W2) in culture. Analogues 6a, 6h and 6 u showed highest activity to inhibit the growth of the parasite with IC50 values in submicromolar range. Structure-activity correlation indicated the necessity of unsubstituted triazoles and leucine linker to obtain maximal growth inhibition of the parasite. Notably, phthalimide 6a and 6u selectively inhibited the ring-stage growth and parasite maturation. On other hand, phthalimide 6h displayed selective schizonticidal activity. Besides, they displayed synergistic interactions with chloroquine and dihydroartemisinin against parasite. Additional in vivo experiments using P. berghei infected mice showed that administration of 6h and 6u alone, as well as in combination with dihydroartemisinin, substantially reduced the parasite load. The high antimalarial activity of 6h and 6u, coupled with low toxicity advocate their potential role as novel antimalarial agents, either as standalone or combination therapies.
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Affiliation(s)
- Prashant Kumar
- Bio-Organic Research Laboratory, Department of Chemistry, University of Delhi, Delhi, 110007, India
| | - Angela O Achieng
- Department of Internal Medicine, Center for Global Health, University of New Mexico Health Sciences Center, Albuquerque, NM, United States of America.,Department of Biomedical Sciences and Technology, School of Public Health and Community Development, Maseno University, Maseno, Kenya
| | - Vinoth Rajendran
- Department of Biochemistry, University of Delhi South Campus, New Delhi, 110021, India
| | - Prahlad C Ghosh
- Department of Biochemistry, University of Delhi South Campus, New Delhi, 110021, India
| | - Brajendra K Singh
- Bio-Organic Research Laboratory, Department of Chemistry, University of Delhi, Delhi, 110007, India
| | - Manmeet Rawat
- Department of Internal Medicine, Center for Global Health, University of New Mexico Health Sciences Center, Albuquerque, NM, United States of America
| | - Douglas J Perkins
- Department of Internal Medicine, Center for Global Health, University of New Mexico Health Sciences Center, Albuquerque, NM, United States of America
| | - Prakasha Kempaiah
- Department of Internal Medicine, Center for Global Health, University of New Mexico Health Sciences Center, Albuquerque, NM, United States of America.
| | - Brijesh Rathi
- Department of Chemistry, Hansraj College University Enclave, University of Delhi, Delhi, 110007, India. .,Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA-02139, United States of America.
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