1
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Mahanta PJ, Lhouvum K. Plasmodium falciparum proteases as new drug targets with special focus on metalloproteases. Mol Biochem Parasitol 2024; 258:111617. [PMID: 38554736 DOI: 10.1016/j.molbiopara.2024.111617] [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: 10/17/2023] [Revised: 02/15/2024] [Accepted: 03/10/2024] [Indexed: 04/02/2024]
Abstract
Malaria poses a significant global health threat particularly due to the prevalence of Plasmodium falciparum infection. With the emergence of parasite resistance to existing drugs including the recently discovered artemisinin, ongoing research seeks novel therapeutic avenues within the malaria parasite. Proteases are promising drug targets due to their essential roles in parasite biology, including hemoglobin digestion, merozoite invasion, and egress. While exploring the genomic landscape of Plasmodium falciparum, it has been revealed that there are 92 predicted proteases, with only approximately 14 of them having been characterized. These proteases are further distributed among 26 families grouped into five clans: aspartic proteases, cysteine proteases, metalloproteases, serine proteases, and threonine proteases. Focus on metalloprotease class shows further role in organelle processing for mitochondria and apicoplasts suggesting the potential of metalloproteases as viable drug targets. Holistic understanding of the parasite intricate life cycle and identification of potential drug targets are essential for developing effective therapeutic strategies against malaria and mitigating its devastating global impact.
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Affiliation(s)
| | - Kimjolly Lhouvum
- Department of Biotechnology, National Institute of Technology, Arunachal Pradesh, India.
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2
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Anderton AS, Knowles OJ, Rossi-Ashton JA, Procter DJ. Flavin-Mediated Photocatalysis Provides a General Platform for Sulfide C-H Functionalization. ACS Catal 2024; 14:2395-2401. [PMID: 38384945 PMCID: PMC10877610 DOI: 10.1021/acscatal.3c05785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 01/16/2024] [Accepted: 01/17/2024] [Indexed: 02/23/2024]
Abstract
Functionalized sulfides are important in many areas of science, ranging from chemical biology through drug discovery to organic materials chemistry. Sulfides bearing pendant reactive groups in the α-position are particularly useful; however, methods for the selective valorization of simple sulfides or the late-stage functionalization of complex sulfides by the convenient addition of valuable functionality are underexplored. Here we exemplify a general reaction platform for sulfide functionalization by showcasing three modes of α-sulfur C-H functionalization; cyanation, alkenylation, and alkynylation. Using inexpensive and commercially available riboflavin tetraacetate and visible light, decoration of both feedstock and complex sulfides proceeds in a good yield and with high selectivity. Methionine-containing peptides can also be selectively functionalized and a tolerance screen using amino-acid dopants suggests that the platform is compatible with most amino-acid side chains and thus is a potential tool for bioconjugation.
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Affiliation(s)
| | | | - James A. Rossi-Ashton
- Department of Chemistry, University
of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - David J. Procter
- Department of Chemistry, University
of Manchester, Oxford Road, Manchester M13 9PL, U.K.
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3
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González JEH, Salas-Sarduy E, Alvarez LH, Valiente PA, Arni RK, Pascutti PG. Three Decades of Targeting Falcipains to Develop Antiplasmodial Agents: What have we Learned and What can be Done Next? Curr Med Chem 2024; 31:2234-2263. [PMID: 37711130 DOI: 10.2174/0929867331666230913165219] [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: 03/28/2023] [Revised: 05/06/2023] [Accepted: 07/25/2023] [Indexed: 09/16/2023]
Abstract
Malaria is a devastating infectious disease that affects large swathes of human populations across the planet's tropical regions. It is caused by parasites of the genus Plasmodium, with Plasmodium falciparum being responsible for the most lethal form of the disease. During the intraerythrocytic stage in the human hosts, malaria parasites multiply and degrade hemoglobin (Hb) using a battery of proteases, which include two cysteine proteases, falcipains 2 and 3 (FP-2 and FP-3). Due to their role as major hemoglobinases, FP-2 and FP-3 have been targeted in studies aiming to discover new antimalarials and numerous inhibitors with activity against these enzymes, and parasites in culture have been identified. Nonetheless, cross-inhibition of human cysteine cathepsins remains a serious hurdle to overcome for these compounds to be used clinically. In this article, we have reviewed key functional and structural properties of FP-2/3 and described different compound series reported as inhibitors of these proteases during decades of active research in the field. Special attention is also paid to the wide range of computer-aided drug design (CADD) techniques successfully applied to discover new active compounds. Finally, we provide guidelines that, in our understanding, will help advance the rational discovery of new FP-2/3 inhibitors.
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Affiliation(s)
- Jorge Enrique Hernández González
- Multiuser Center for Biomolecular Innovation, IBILCE/UNESP, São José do Rio Preto, SP, Brazil
- Department of Pharmaceutical Sciences, UZA II, University of Vienna, Vienna, 1090, Austria
| | - Emir Salas-Sarduy
- Instituto de Investigaciones Biotecnológicas Dr. Rodolfo Ugalde, Universidad Nacional de San Martín, CONICET, San Martín, Buenos Aires, Argentina
- Escuela de Bio y Nanotecnología (EByN), Universidad de San Martín (UNSAM), San Martín, Buenos Aires, Argentina
| | | | - Pedro Alberto Valiente
- Donnelly Centre for Cellular & Biomolecular Research, University of Toronto, Toronto, Canada
| | | | - Pedro Geraldo Pascutti
- Laboratório de Modelagem e Dinâmica Molecular, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, RJ, Brazil
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4
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Fonte M, Fontinha D, Moita D, Caño-Prades O, Avalos-Padilla Y, Fernàndez-Busquets X, Prudêncio M, Gomes P, Teixeira C. New 4-(N-cinnamoylbutyl)aminoacridines as potential multi-stage antiplasmodial leads. Eur J Med Chem 2023; 258:115575. [PMID: 37390511 DOI: 10.1016/j.ejmech.2023.115575] [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: 04/14/2023] [Revised: 06/09/2023] [Accepted: 06/14/2023] [Indexed: 07/02/2023]
Abstract
A novel family of 4-aminoacridine derivatives was obtained by linking this heteroaromatic core to different trans-cinnamic acids. The 4-(N-cinnamoylbutyl)aminoacridines obtained exhibited in vitro activity in the low- or sub-micromolar range against (i) hepatic stages of Plasmodium berghei, (ii) erythrocytic forms of Plasmodium falciparum, and (iii) early and mature gametocytes of Plasmodium falciparum. The most active compound, having a meta-fluorocinnamoyl group linked to the acridine core, was 20- and 120-fold more potent, respectively, against the hepatic and gametocyte stages of Plasmodium infection than the reference drug, primaquine. Moreover, no cytotoxicity towards mammalian and red blood cells at the concentrations tested was observed for any of the compounds under investigation. These novel conjugates represent promising leads for the development of new multi-target antiplasmodials.
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Affiliation(s)
- Mélanie Fonte
- LAQV-REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Portugal.
| | - Diana Fontinha
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Portugal
| | - Diana Moita
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Portugal
| | - Omar Caño-Prades
- Nanomalaria Group, Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Yunuen Avalos-Padilla
- Nanomalaria Group, Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Xavier Fernàndez-Busquets
- Nanomalaria Group, Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology, Barcelona, Spain; Barcelona Institute for Global Health (ISGlobal, Hospital Clínic-Universitat de Barcelona), Spain; Nanoscience and Nanotechnology Institute (IN2UB), University of Barcelona, Spain
| | - Miguel Prudêncio
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Portugal
| | - Paula Gomes
- LAQV-REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Portugal.
| | - Cátia Teixeira
- LAQV-REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Portugal; Gyros Protein Technologies Inc., Tucson, AZ, USA
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5
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Boatner LM, Palafox MF, Schweppe DK, Backus KM. CysDB: a human cysteine database based on experimental quantitative chemoproteomics. Cell Chem Biol 2023; 30:683-698.e3. [PMID: 37119813 PMCID: PMC10510411 DOI: 10.1016/j.chembiol.2023.04.004] [Citation(s) in RCA: 28] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Revised: 02/02/2023] [Accepted: 04/06/2023] [Indexed: 05/01/2023]
Abstract
Cysteine chemoproteomics provides proteome-wide portraits of the ligandability or potential "druggability" for thousands of cysteine residues. Consequently, these studies are facilitating resources for closing the druggability gap, namely, achieving pharmacological manipulation of ∼96% of the human proteome that remains untargeted by U.S. Food and Drug Administration (FDA) approved small molecules. Recent interactive datasets have enabled users to interface more readily with cysteine chemoproteomics datasets. However, these resources remain limited to single studies and therefore do not provide a mechanism to perform cross-study analyses. Here we report CysDB as a curated community-wide repository of human cysteine chemoproteomics data derived from nine high-coverage studies. CysDB is publicly available at https://backuslab.shinyapps.io/cysdb/ and features measures of identification for 62,888 cysteines (24% of the cysteinome), as well as annotations of functionality, druggability, disease relevance, genetic variation, and structural features. Most importantly, we have designed CysDB to incorporate new datasets to further support the continued growth of the druggable cysteinome.
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Affiliation(s)
- Lisa M Boatner
- Biological Chemistry Department, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095, USA; Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Maria F Palafox
- Department of Human Genetics, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Devin K Schweppe
- Department of Genome Sciences, University of Washington, Seattle, WA 98185, USA
| | - Keriann M Backus
- Biological Chemistry Department, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095, USA; Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA; Molecular Biology Institute, University of California, Los Angeles, Los Angeles, CA 90095, USA; DOE Institute for Genomics and Proteomics, University of California, Los Angeles, Los Angeles, CA 90095, USA; Jonsson Comprehensive Cancer Center, University of California, Los Angeles, Los Angeles, CA 90095, USA; Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, University of California, Los Angeles, Los Angeles, CA 90095, USA.
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6
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Patra J, Rana D, Arora S, Pal M, Mahindroo N. Falcipains: Biochemistry, target validation and structure-activity relationship studies of inhibitors as antimalarials. Eur J Med Chem 2023; 252:115299. [PMID: 36996716 DOI: 10.1016/j.ejmech.2023.115299] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 03/04/2023] [Accepted: 03/17/2023] [Indexed: 03/29/2023]
Abstract
Malaria is a tropical disease with significant morbidity and mortality burden caused by Plasmodium species in Africa, the Middle East, Asia, and South America. Pathogenic Plasmodium species have lately become increasingly resistant to approved chemotherapeutics and combination therapies. Therefore, there is an emergent need for identifying new druggable targets and novel chemical classes against the parasite. Falcipains, cysteine proteases required for heme metabolism in the erythrocytic stage, have emerged as promising drug targets against Plasmodium species that infect humans. This perspective discusses the biology, biochemistry, structural features, and genetics of falcipains. The efforts to identify selective or dual inhibitors and their structure-activity relationships are reviewed to give a perspective on the design of novel compounds targeting falcipains for antimalarial activity evaluating reasons for hits and misses for this important target.
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Affiliation(s)
- Jeevan Patra
- School of Health Sciences and Technology, University of Petroleum and Energy Studies, Energy Acres, Bidholi, Via Prem Nagar, Uttarakhand, 248007, India
| | - Devika Rana
- School of Pharmaceutical Sciences, Shoolini University of Biotechnology and Management Sciences, Bajhol, Solan, Himachal Pradesh, 173229, India
| | - Smriti Arora
- School of Health Sciences and Technology, University of Petroleum and Energy Studies, Energy Acres, Bidholi, Via Prem Nagar, Uttarakhand, 248007, India
| | - Mintu Pal
- Department of Pharmacology, All India Institute of Medical Sciences (AIIMS), Bathinda, Punjab, 151001, India
| | - Neeraj Mahindroo
- School of Health Sciences and Technology, University of Petroleum and Energy Studies, Energy Acres, Bidholi, Via Prem Nagar, Uttarakhand, 248007, India; School of Health Sciences and Technology, Dr. Vishwanath Karad MIT World Peace University, 124 Paud Road, Kothrud, Pune, Maharashtra, 411038, India.
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7
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Ngwa CJ, Stratmann R, Musabyimana JP, Pannen K, Schöbel JH, Frings M, Schiffers I, Quaranta C, Koschmieder S, Chatain N, Pradel G, Bolm C. Evaluation of Chiral Organosulfur Compounds on Their Activity against the Malaria Parasite Plasmodium falciparum. Trop Med Infect Dis 2022; 7:tropicalmed7120416. [PMID: 36548671 PMCID: PMC9785921 DOI: 10.3390/tropicalmed7120416] [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: 10/20/2022] [Revised: 11/21/2022] [Accepted: 11/30/2022] [Indexed: 12/09/2022] Open
Abstract
Malaria is one of the deadliest tropical diseases, especially causing havoc in children under the age of five in Africa. Although the disease is treatable, the rapid development of drug resistant parasites against frontline drugs requires the search for novel antimalarials. In this study, we tested a series of organosulfur compounds from our internal library for their antiplasmodial effect against Plasmodium falciparum asexual and sexual blood stages. Some active compounds were also obtained in enantiomerically pure form and tested individually against asexual blood stages of the parasite to compare their activity. Out of the 23 tested compounds, 7 compounds (1, 2, 5, 9, 15, 16, and 17) exhibited high antimalarial activity, with IC50 values in the range from 2.2 ± 0.64 to 5.2 ± 1.95 µM, while the other compounds showed moderate to very low activity. The most active compounds also exhibited high activity against the chloroquine-resistant strain, reduced gametocyte development and were not toxic to non-infected red blood cells and Hela cells, as well as the hematopoietic HEL cell line at concentrations below 50 µM. To determine if the enantiomers of the active compounds display different antimalarial activity, enantiomers of two of the active compounds were separated and their antimalarial activity compared. The results show a higher activity of the (-) enantiomers as compared to their (+) counterparts. Our combined data indicate that organosulfur compounds could be exploited as antimalarial drugs and enantiomers of the active compounds may represent a good starting point for the design of novel drugs to target malaria.
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Affiliation(s)
- Che Julius Ngwa
- Division of Cellular and Applied Infection Biology, Institute of Zoology, RWTH Aachen University, 52074 Aachen, Germany
- Correspondence: (C.J.N.); (C.B.)
| | - Rabea Stratmann
- Division of Cellular and Applied Infection Biology, Institute of Zoology, RWTH Aachen University, 52074 Aachen, Germany
| | - Jean Pierre Musabyimana
- Division of Cellular and Applied Infection Biology, Institute of Zoology, RWTH Aachen University, 52074 Aachen, Germany
| | - Kristina Pannen
- Department of Hematology, Oncology, Hemostaseology, and Stem Cell Transplantation, Faculty of Medicine, RWTH Aachen University, 52074 Aachen, Germany
- Center for Integrated Oncology, Aachen Bonn Cologne Düsseldorf (CIO ABCD), 52074 Aachen, Germany
| | - Jan-Hendrik Schöbel
- Institute of Organic Chemistry, RWTH Aachen University, 52074 Aachen, Germany
| | - Marcus Frings
- Institute of Organic Chemistry, RWTH Aachen University, 52074 Aachen, Germany
| | - Ingo Schiffers
- Institute of Organic Chemistry, RWTH Aachen University, 52074 Aachen, Germany
| | - Calogero Quaranta
- Institute of Organic Chemistry, RWTH Aachen University, 52074 Aachen, Germany
| | - Steffen Koschmieder
- Department of Hematology, Oncology, Hemostaseology, and Stem Cell Transplantation, Faculty of Medicine, RWTH Aachen University, 52074 Aachen, Germany
- Center for Integrated Oncology, Aachen Bonn Cologne Düsseldorf (CIO ABCD), 52074 Aachen, Germany
| | - Nicolas Chatain
- Department of Hematology, Oncology, Hemostaseology, and Stem Cell Transplantation, Faculty of Medicine, RWTH Aachen University, 52074 Aachen, Germany
- Center for Integrated Oncology, Aachen Bonn Cologne Düsseldorf (CIO ABCD), 52074 Aachen, Germany
| | - Gabriele Pradel
- Division of Cellular and Applied Infection Biology, Institute of Zoology, RWTH Aachen University, 52074 Aachen, Germany
| | - Carsten Bolm
- Institute of Organic Chemistry, RWTH Aachen University, 52074 Aachen, Germany
- Correspondence: (C.J.N.); (C.B.)
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8
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Sangwan S, Yadav N, Kumar R, Chauhan S, Dhanda V, Walia P, Duhan A. A score years’ update in the synthesis and biological evaluation of medicinally important 2-pyridones. Eur J Med Chem 2022; 232:114199. [DOI: 10.1016/j.ejmech.2022.114199] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 02/06/2022] [Accepted: 02/10/2022] [Indexed: 12/18/2022]
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9
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Abid M, Singh S, Egan TJ, Joshi MC. Structural activity relationship of metallo-aminoquines as a next generation antimalarials. Curr Top Med Chem 2022; 22:436-472. [PMID: 34986771 DOI: 10.2174/1568026622666220105103751] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Revised: 12/02/2021] [Accepted: 12/05/2021] [Indexed: 11/22/2022]
Abstract
Apicomplexian parasite of the genus Plasmodium is the causative agent of malaria, one of the most devastating, furious and common infectious disease throughout the world. According to the latest World malaria report, there were 229 million cases of malaria in 2019 majorly consisting of children under 5 years of age. Some of known analogues viz. quinine, quinoline-containing compounds have been used for last century in the clinical treatment of malaria. Past few decades have witnessed the emergence of multi-drug resistance (MDR) strains of Plasmodium species to existing antimalarials pressing the need for new drug candidates. For the past few decades bioorganometallic approach to malaria therapy has been introduced which led to the discovery of noval metalcontaining aminoquinolines analogues viz. ferroquine (FQ or 1), Ruthenoquine (RQ or 2) and other related potent metal-analogues. It observed that some metal containing analogues (Fe-, Rh-, Ru-, Re-, Au-, Zn-, Cr-, Pd-, Sn-, Cd-, Ir-, Co-, Cu-, and Mn-aminoquines) were more potent; however, some were equally potent as Chloroquine (CQ) and 1. This is probably due to the intertion of metals in the CQ via various approaches, which might be a very attractive strategy to develop a SAR of novel metal containing antimalarials. Thus, this review aims to summarize the SAR of metal containing aminoquines towards the discovery of potent antimalarial hybrids to provide an insight for rational designs of more effective and less toxic metal containing amoniquines.
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Affiliation(s)
- Mohammad Abid
- Department of Biosciences, Jamia Millia Islamia University, Jamia Nagar, New Delhi-110025, India
| | - Shailja Singh
- Special Centre for Molecular Medicine, Jawaharlal Nehru University, New Mehroli Road, New Delhi-110067, India
| | - Timothy J Egan
- Department of Chemistry, University of Cape Town, Rondebosch, Cape Town-7700, South Africa
| | - Mukesh C Joshi
- Dept. of Chemistry, Motilal Nehru College, University of Delhi, Benito Juarez marg, South Campus, New Delhi-110021. India
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10
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Saliy IV, Gotsko MD, Sobenina LN, Ushakov IA, Trofimov BA. Chemo- and stereoselective synthesis of E-2-(2-acyl-1-tosylvinyl)pyrroles from tosylmethyl isocyanide (TosMIC) and 2-(acylethynyl)pyrroles. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153432] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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11
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Chen D, Lin L, Peng X, Yu X, Yang Z, Liu Y, Zhang X, Li J, Jiang H. Transition-metal-free NaI-mediated reaction of aryl sulfonyl chloride with alkynes: Synthesis of (E)-β-iodovinyl sulfones. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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12
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Ettari R, Previti S, Di Chio C, Zappalà M. Falcipain-2 and Falcipain-3 Inhibitors as Promising Antimalarial Agents. Curr Med Chem 2021; 28:3010-3031. [PMID: 32744954 DOI: 10.2174/0929867327666200730215316] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 07/01/2020] [Accepted: 07/11/2020] [Indexed: 11/22/2022]
Abstract
Malaria remains a serious problem in global public health, particularly widespread in South America and in tropical regions of Africa and Asia. Chemotherapy is actually the only way to treat this poverty-related disease, since an effective vaccine is not currently available. However, the onset of resistance to the most common antimalarial drugs sometimes makes the current therapeutic regimen problematic. Therefore, the identification of new targets for a new drug discovery process is an urgent priority. In this context, falcipain-2 and falcipain- 3 of P. falciparum represent the key enzymes in the life-cycle of the parasite. Both falcipain- 2 and falcipain-3 are involved in hemoglobin hydrolysis, an essential pathway to provide free amino acids for the parasite metabolic needs. In addition, falcipain-2 is involved in cleaving ankirin and band 4.1 protein, which are cytoskeletal elements essential for the stability of the red cell membrane. This review article is focused on the most recent and effective inhibitors of falcipain-2 and falcipain-3, with particular attention to peptide, peptidomimetic or nonpeptide inhibitors, which targeted one or both the malarial cysteine proteases, endowed with a consistent activity against P. falciparum.
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Affiliation(s)
- Roberta Ettari
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Annunziata, 98168 Messina, Italy
| | - Santo Previti
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Annunziata, 98168 Messina, Italy
| | - Carla Di Chio
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Annunziata, 98168 Messina, Italy
| | - Maria Zappalà
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Annunziata, 98168 Messina, Italy
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13
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Rout UK, Sanket AS, Sisodia BS, Mohapatra PK, Pati S, Kant R, Dwivedi GR. A Comparative Review on Current and Future Drug Targets Against Bacteria & Malaria. Curr Drug Targets 2021; 21:736-775. [PMID: 31995004 DOI: 10.2174/1389450121666200129103618] [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: 09/05/2019] [Revised: 12/13/2019] [Accepted: 12/20/2019] [Indexed: 11/22/2022]
Abstract
Long before the discovery of drugs like 'antibiotic and anti-parasitic drugs', the infectious diseases caused by pathogenic bacteria and parasites remain as one of the major causes of morbidity and mortality in developing and underdeveloped countries. The phenomenon by which the organism exerts resistance against two or more structurally unrelated drugs is called multidrug resistance (MDR) and its emergence has further complicated the treatment scenario of infectious diseases. Resistance towards the available set of treatment options and poor pipeline of novel drug development puts an alarming situation. A universal goal in the post-genomic era is to identify novel targets/drugs for various life-threatening diseases caused by such pathogens. This review is conceptualized in the backdrop of drug resistance in two major pathogens i.e. "Pseudomonas aeruginosa" and "Plasmodium falciparum". In this review, the available targets and key mechanisms of resistance of these pathogens have been discussed in detail. An attempt has also been made to analyze the common drug targets of bacteria and malaria parasite to overcome the current drug resistance scenario. The solution is also hypothesized in terms of a present pipeline of drugs and efforts made by scientific community.
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Affiliation(s)
- Usha K Rout
- Microbiology Department, ICMR-Regional Medical Research Centre, Bhubaneswar-751023, India
| | | | - Brijesh S Sisodia
- Regional Ayurveda Research Institute for Drug Development, Gwalior-474 009, India
| | | | - Sanghamitra Pati
- Microbiology Department, ICMR-Regional Medical Research Centre, Bhubaneswar-751023, India
| | - Rajni Kant
- ICMR-Regional Medical Research Centre, Gorakhpur, Uttar Pradesh- 273013, India
| | - Gaurav R Dwivedi
- ICMR-Regional Medical Research Centre, Gorakhpur, Uttar Pradesh- 273013, India
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14
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Jílková A, Rubešová P, Fanfrlík J, Fajtová P, Řezáčová P, Brynda J, Lepšík M, Mertlíková-Kaiserová H, Emal CD, Renslo AR, Roush WR, Horn M, Caffrey CR, Mareš M. Druggable Hot Spots in the Schistosomiasis Cathepsin B1 Target Identified by Functional and Binding Mode Analysis of Potent Vinyl Sulfone Inhibitors. ACS Infect Dis 2021; 7:1077-1088. [PMID: 33175511 PMCID: PMC8154419 DOI: 10.1021/acsinfecdis.0c00501] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
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Schistosomiasis, a parasitic disease
caused by blood flukes of
the genus Schistosoma, is a global health problem
with over 200 million people infected. Treatment relies on just one
drug, and new chemotherapies are needed. Schistosoma mansoni cathepsin B1 (SmCB1) is a critical peptidase for the digestion of
host blood proteins and a validated drug target. We screened a library
of peptidomimetic vinyl sulfones against SmCB1 and identified the
most potent SmCB1 inhibitors reported to date that are active in the
subnanomolar range with second order rate constants (k2nd) of ∼2 × 105 M–1 s–1. High resolution crystal structures of the
two best inhibitors in complex with SmCB1 were determined. Quantum
chemical calculations of their respective binding modes identified
critical hot spot interactions in the S1′ and S2 subsites.
The most potent inhibitor targets the S1′ subsite with an N-hydroxysulfonic amide moiety and displays favorable functional
properties, including bioactivity against the pathogen, selectivity
for SmCB1 over human cathepsin B, and reasonable metabolic stability.
Our results provide structural insights for the rational design of
next-generation SmCB1 inhibitors as potential drugs to treat schistosomiasis.
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Affiliation(s)
- Adéla Jílková
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo n. 2, 16610 Prague, Czech Republic
| | - Petra Rubešová
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo n. 2, 16610 Prague, Czech Republic
| | - Jindřich Fanfrlík
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo n. 2, 16610 Prague, Czech Republic
| | - Pavla Fajtová
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo n. 2, 16610 Prague, Czech Republic
| | - Pavlína Řezáčová
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo n. 2, 16610 Prague, Czech Republic
| | - Jiří Brynda
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo n. 2, 16610 Prague, Czech Republic
| | - Martin Lepšík
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo n. 2, 16610 Prague, Czech Republic
| | - Helena Mertlíková-Kaiserová
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo n. 2, 16610 Prague, Czech Republic
| | - Cory D. Emal
- Eastern Michigan University, 541 Mark Jefferson, Ypsilanti, Michigan 48197, United States
| | - Adam R. Renslo
- University of California San Francisco, 600 16th Street, San Francisco, California 94143, United States
| | - William R. Roush
- The Scripps Research Institute, 130 Scripps Way, Jupiter, Florida 33458, United States
| | - Martin Horn
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo n. 2, 16610 Prague, 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, California 92093, United States
| | - Michael Mareš
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo n. 2, 16610 Prague, Czech Republic
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15
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Aratikatla EK, Kalamuddin M, Rana KC, Datta G, Asad M, Sundararaman S, Malhotra P, Mohmmed A, Bhattacharya AK. Combating multi-drug resistant malaria parasite by inhibiting falcipain-2 and heme-polymerization: Artemisinin-peptidyl vinyl phosphonate hybrid molecules as new antimalarials. Eur J Med Chem 2021; 220:113454. [PMID: 33901900 DOI: 10.1016/j.ejmech.2021.113454] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 03/25/2021] [Accepted: 04/07/2021] [Indexed: 10/21/2022]
Abstract
Artemisinin-based combination therapies (ACTs) have been able to reduce the clinical and pathological malaria cases in endemic areas around the globe. However, recent reports have shown a progressive decline in malaria parasite clearance in South-east Asia after ACT treatment, thus envisaging a need for new artemisinin (ART) derivatives and combinations. To address the emergence of drug resistance to current antimalarials, here we report the synthesis of artemisinin-peptidyl vinyl phosphonate hybrid molecules that show superior efficacy than artemisinin alone against chloroquine-resistant as well as multidrug-resistant Plasmodium falciparum strains with EC50 in pico-molar ranges. Further, the compounds effectively inhibited the survival of ring-stage parasite for laboratory-adapted artemisinin-resistant parasite lines as compared to artemisinin. These hybrid molecules showed complete parasite clearance in vivo using P. berghei mouse malaria model in comparison to artemisinin alone. Studies on the mode of action of hybrid molecules suggested that these artemisinin-peptidyl vinyl phosphonate hybrid molecules possessed dual activities: inhibited falcipain-2 (FP-2) activity, a P. falciparum cysteine protease involved in hemoglobin degradation, and also blocked the hemozoin formation in the food-vacuole, a step earlier shown to be blocked by artemisinin. Since these hybrid molecules blocked multiple steps of a pathway and showed synergistic efficacies, we believe that these lead compounds can be developed as effective antimalarials to prevent the spread of resistance to current antimalarials.
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Affiliation(s)
- Eswar K Aratikatla
- Division of Organic Chemistry, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune, 411 008, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-NCL, Pune, 411 008, India
| | - Md Kalamuddin
- International Centre for Genetic Engineering & Biotechnology (ICGEB), Aruna Asif Ali Marg, New Delhi, 100 067, India
| | - Kalpeshkumar C Rana
- Division of Organic Chemistry, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune, 411 008, India
| | - Gaurav Datta
- International Centre for Genetic Engineering & Biotechnology (ICGEB), Aruna Asif Ali Marg, New Delhi, 100 067, India
| | - Mohd Asad
- International Centre for Genetic Engineering & Biotechnology (ICGEB), Aruna Asif Ali Marg, New Delhi, 100 067, India
| | - Srividhya Sundararaman
- International Centre for Genetic Engineering & Biotechnology (ICGEB), Aruna Asif Ali Marg, New Delhi, 100 067, India
| | - Pawan Malhotra
- International Centre for Genetic Engineering & Biotechnology (ICGEB), Aruna Asif Ali Marg, New Delhi, 100 067, India
| | - Asif Mohmmed
- International Centre for Genetic Engineering & Biotechnology (ICGEB), Aruna Asif Ali Marg, New Delhi, 100 067, India.
| | - Asish K Bhattacharya
- Division of Organic Chemistry, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune, 411 008, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-NCL, Pune, 411 008, India.
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16
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Ueda M, Kamikawa K, Fukuyama T, Wang YT, Wu YK, Ryu I. Site-Selective Alkenylation of Unactivated C(sp 3 )-H Bonds Mediated by Compact Sulfate Radical. Angew Chem Int Ed Engl 2021; 60:3545-3550. [PMID: 33128429 DOI: 10.1002/anie.202011992] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 10/27/2020] [Indexed: 01/07/2023]
Abstract
A broad variety of unactivated acyclic and alicyclic substrates cleanly undergo site-selective alkenylation of unactivated C(sp3 )-H bonds with 1,2-bis(phenylsulfonyl)ethene in the presence of persulfate. This simple transformation furnishes (E)-2-alkylvinylphenylsulfones in up to 88 % yield. In contrast with the previously reported decatungstate protocol, the current method is applicable to alkenylation of sterically hindered C-H bonds. This important advantage significantly broadens the substrate scope, and is attributed to the compact size of the sulfate radical employed in the C-H activation and cleavage.
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Affiliation(s)
- Mitsuhiro Ueda
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka, 599-8531, Japan
| | - Kazuya Kamikawa
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka, 599-8531, Japan
| | - Takahide Fukuyama
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka, 599-8531, Japan
| | - Yi-Ting Wang
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu, Taiwan
| | - Yen-Ku Wu
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu, Taiwan
| | - Ilhyong Ryu
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka, 599-8531, Japan
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu, Taiwan
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17
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Ueda M, Kamikawa K, Fukuyama T, Wang Y, Wu Y, Ryu I. Site‐Selective Alkenylation of Unactivated C(sp
3
)−H Bonds Mediated by Compact Sulfate Radical. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202011992] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Mitsuhiro Ueda
- Department of Chemistry Graduate School of Science Osaka Prefecture University Sakai Osaka 599-8531 Japan
| | - Kazuya Kamikawa
- Department of Chemistry Graduate School of Science Osaka Prefecture University Sakai Osaka 599-8531 Japan
| | - Takahide Fukuyama
- Department of Chemistry Graduate School of Science Osaka Prefecture University Sakai Osaka 599-8531 Japan
| | - Yi‐Ting Wang
- Department of Applied Chemistry National Chiao Tung University Hsinchu Taiwan
| | - Yen‐Ku Wu
- Department of Applied Chemistry National Chiao Tung University Hsinchu Taiwan
| | - Ilhyong Ryu
- Department of Chemistry Graduate School of Science Osaka Prefecture University Sakai Osaka 599-8531 Japan
- Department of Applied Chemistry National Chiao Tung University Hsinchu Taiwan
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18
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Doherty W, Adler N, Butler TJ, Knox AJS, Evans P. Synthesis and optimisation of P 3 substituted vinyl sulfone-based inhibitors as anti-trypanosomal agents. Bioorg Med Chem 2020; 28:115774. [PMID: 32992251 DOI: 10.1016/j.bmc.2020.115774] [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] [Received: 07/01/2020] [Revised: 09/07/2020] [Accepted: 09/09/2020] [Indexed: 10/23/2022]
Abstract
A series of lysine-based vinyl sulfone peptidomimetics were synthesised and evaluated for anti-trypanosomal activity against bloodstream forms of T. brucei. This focused set of compounds, varying in the P3 position, were accessed in a divergent manner from a common intermediate (ammonium salt 8). Several P3 analogues exhibited sub-micromolar EC50 values, with thiourea 14, urea 15 and amide 21 representing the most potent anti-trypanosomal derivatives of the series. In order to establish an in vitro selectivity index the most active anti-trypanosomal compounds were also assessed for their impact on cell viability and cytotoxity effects in mammalian cells. Encouragingly, all compounds only reduced cellular metabolic activity in mammalian cells to a modest level and little, or no cytotoxicity, was observed with the series.
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Affiliation(s)
- William Doherty
- Centre for Synthesis and Chemical Biology, School of Chemistry and Chemical Biology, University College Dublin, Dublin D04 N2E2, Ireland
| | - Nikoletta Adler
- School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Pearse Street, Dublin 2, Ireland
| | - Thomas J Butler
- School of Biological and Health Sciences, Technological University Dublin, Dublin City Campus, Kevin St., Dublin D08 NF82, Ireland
| | - Andrew J S Knox
- School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Pearse Street, Dublin 2, Ireland; School of Biological and Health Sciences, Technological University Dublin, Dublin City Campus, Kevin St., Dublin D08 NF82, Ireland.
| | - Paul Evans
- Centre for Synthesis and Chemical Biology, School of Chemistry and Chemical Biology, University College Dublin, Dublin D04 N2E2, Ireland.
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19
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Singh A, Kalamuddin M, Maqbool M, Mohmmed A, Malhotra P, Hoda N. Quinoline carboxamide core moiety-based compounds inhibit P. falciparumfalcipain-2: Design, synthesis and antimalarial efficacy studies. Bioorg Chem 2020; 108:104514. [PMID: 33280833 DOI: 10.1016/j.bioorg.2020.104514] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 09/07/2020] [Accepted: 11/19/2020] [Indexed: 12/11/2022]
Abstract
Targeting Falcipain-2 (FP2) for the development of antimalarials is a promising and established concept in antimalarial drug discovery and development. FP2, a member of papain-family cysteine protease of the malaria parasite Plasmodium falciparum holds an important role in hemoglobin degradation pathway. A new series of quinoline carboxamide-based compounds was designed, synthesized and evaluated for antimalarial activity. We integrated molecular hybridization strategy with in-silico drug design to develop FP2 inhibitors. In-vitro results of FP2 inhibition by Qs17, Qs18, Qs20 and Qs21 were found to be in low micromolar range with IC50 4.78, 7.37, 2.14 and 2.64 µM, respectively. Among the 25 synthesized compounds, four compounds showed significant antimalarial activities. These compounds also depicted morphological and food-vacuole abnormalities much better than that of E-64, an established FP2 inhibitor. Overall these aromatic substituted quinoline carboxamides can serve as promising leads for the development of novel antimalarial agents.
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Affiliation(s)
- Anju Singh
- Drug Design and Synthesis Lab., Department of Chemistry, Jamia Millia Islamia, Jamia Nagar, New Delhi 110025, India
| | - Md Kalamuddin
- International Centre for Genetic Engineering and Biotechnology (ICGEB), Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Mudasir Maqbool
- Drug Design and Synthesis Lab., Department of Chemistry, Jamia Millia Islamia, Jamia Nagar, New Delhi 110025, India
| | - Asif Mohmmed
- International Centre for Genetic Engineering and Biotechnology (ICGEB), Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Pawan Malhotra
- International Centre for Genetic Engineering and Biotechnology (ICGEB), Aruna Asaf Ali Marg, New Delhi 110067, India.
| | - Nasimul Hoda
- Drug Design and Synthesis Lab., Department of Chemistry, Jamia Millia Islamia, Jamia Nagar, New Delhi 110025, India.
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20
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Fotopoulos I, Hadjipavlou-Litina D. Hybrids of Coumarin Derivatives as Potent and Multifunctional Bioactive Agents: A Review. Med Chem 2020; 16:272-306. [PMID: 31038071 DOI: 10.2174/1573406415666190416121448] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Revised: 03/22/2019] [Accepted: 04/09/2019] [Indexed: 02/07/2023]
Abstract
BACKGROUND Coumarins exhibit a plethora of biological activities, e.g. antiinflammatory and anti-tumor. Molecular hybridization technique has been implemented in the design of novel coumarin hybrids with several bioactive groups in order to obtain molecules with better pharmacological activity and improved pharmacokinetic profile. OBJECTIVE Therefore, we tried to gather as many as possible biologically active coumarin hybrids referred in the literature till now, to delineate the structural characteristics in relation to the activities and to have a survey that might help the medicinal chemists to design new coumarin hybrids with drug-likeness and varied bioactivities. RESULTS The biological activities of the hybrids in most of the cases were found to be different from the biological activities presented by the parent coumarins. The results showed that the hybrid molecules are more potent compared to the standard drugs used in the evaluation experiments. CONCLUSION Conjugation of coumarin with varied pharmacophore groups/druglike molecules responsible for different biological activities led to many novel hybrid molecules, with a multitarget behavior and improved pharmacokinetic properties.
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Affiliation(s)
- Ioannis Fotopoulos
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - Dimitra Hadjipavlou-Litina
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
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21
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Aratikatla E, Kalamuddin M, Malhotra P, Mohmmed A, Bhattacharya AK. Enantioselective Synthesis of γ-Phenyl-γ-amino Vinyl Phosphonates and Sulfones and Their Application to the Synthesis of Novel Highly Potent Antimalarials. ACS OMEGA 2020; 5:29025-29037. [PMID: 33225134 PMCID: PMC7675543 DOI: 10.1021/acsomega.0c03470] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 10/16/2020] [Indexed: 06/11/2023]
Abstract
Racemic and enantioselective syntheses of γ-phenyl-γ-amino vinyl phosphonates and sulfones have been achieved using Horner-Wadsworth-Emmons olefination of trityl protected α-phenyl-α-amino aldehydes with tetraethyl methylenediphosphonate and diethyl ((phenylsulfonyl)methyl)phosphonate, respectively, without any racemization. The present strategy has also been successfully applied to the synthesis of peptidyl vinyl phosphonate and peptidyl vinyl sulfone derivatives as potential cysteine protease inhibitors of Chagas disease, K11002, with 100% de. The developed synthetic protocol was further utilized to synthesize hybrid molecules consisting of artemisinin as an inhibitor of major cysteine protease falcipain-2 present in the food vacuole of the malarial parasite. The synthesized artemisinin-dipeptidyl vinyl sulfone hybrid compounds showed effective in vitro inhibition of falcipain-2 and potent parasiticidal efficacies against Plasmodium falciparum in nanomolar ranges. Overall, the developed synthetic protocol could be effectively utilized to design cysteine protease inhibitors not only as novel antimalarial compounds but also to be involved in other life-threatening diseases.
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Affiliation(s)
- Eswar
K. Aratikatla
- Division
of Organic Chemistry, CSIR-National Chemical
Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune 411 008, India
- Academy
of Scientific and Innovative Research (AcSIR), CSIR-NCL, Pune 411 008, India
| | - Md Kalamuddin
- International
Centre for Genetic Engineering & Biotechnology (ICGEB) Aruna Asif
Ali Marg, New Delhi 100 067, India
| | - Pawan Malhotra
- International
Centre for Genetic Engineering & Biotechnology (ICGEB) Aruna Asif
Ali Marg, New Delhi 100 067, India
| | - Asif Mohmmed
- International
Centre for Genetic Engineering & Biotechnology (ICGEB) Aruna Asif
Ali Marg, New Delhi 100 067, India
| | - Asish K. Bhattacharya
- Division
of Organic Chemistry, CSIR-National Chemical
Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune 411 008, India
- Academy
of Scientific and Innovative Research (AcSIR), CSIR-NCL, Pune 411 008, India
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22
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Identification of antimalarial leads with dual falcipain-2 and falcipain-3 inhibitory activity. Bioorg Med Chem 2020; 28:115155. [DOI: 10.1016/j.bmc.2019.115155] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2019] [Revised: 09/26/2019] [Accepted: 10/03/2019] [Indexed: 12/17/2022]
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23
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Vieira RP, Santos VC, Ferreira RS. Structure-based Approaches Targeting Parasite Cysteine Proteases. Curr Med Chem 2019; 26:4435-4453. [PMID: 28799498 DOI: 10.2174/0929867324666170810165302] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Revised: 07/18/2017] [Accepted: 07/18/2017] [Indexed: 12/17/2022]
Abstract
Cysteine proteases are essential hydrolytic enzymes present in the majority of organisms, including viruses and unicellular parasites. Despite the high sequence identity displayed among these proteins, specific structural features across different species grant distinct functions to these biomolecules, frequently related to pathological conditions. Consequently, their relevance as promising targets for potential specific inhibitors has been highlighted and occasionally validated in recent decades. In this review, we discuss the recent outcomes of structure-based campaigns aiming the discovery of new inhibitor prototypes against cruzain and falcipain, as alternative therapeutic tools for Chagas disease and malaria treatments, respectively. Computational and synthetic approaches have been combined on hit optimization strategies and are also discussed herein. These rationales are extended to additional tropical infectious and neglected pathologies, such as schistosomiasis, leishmaniasis and babesiosis, and also to Alzheimer's Disease, a widespread neurodegenerative disease poorly managed by currently available drugs and recently linked to particular physiopathological roles of human cysteine proteases.
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Affiliation(s)
- Rafael Pinto Vieira
- Departamento de Bioquimica e Imunologia, Instituto de Ciencias Biologicas, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, MG, Brazil.,CAPES Foundation, Ministry of Education of Brazil, 70040-020 Brasília, DF, Brazil
| | - Viviane Corrêa Santos
- Departamento de Bioquimica e Imunologia, Instituto de Ciencias Biologicas, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, MG, Brazil
| | - Rafaela Salgado Ferreira
- Departamento de Bioquimica e Imunologia, Instituto de Ciencias Biologicas, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, MG, Brazil
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24
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Design, synthesis and evaluation of 2-(4-(substituted benzoyl)-1,4-diazepan-1-yl)-N-phenylacetamide derivatives as a new class of falcipain-2 inhibitors. ARAB J CHEM 2019. [DOI: 10.1016/j.arabjc.2014.11.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
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25
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Alberca LN, Chuguransky SR, Álvarez CL, Talevi A, Salas-Sarduy E. In silico Guided Drug Repurposing: Discovery of New Competitive and Non-competitive Inhibitors of Falcipain-2. Front Chem 2019; 7:534. [PMID: 31448257 PMCID: PMC6691349 DOI: 10.3389/fchem.2019.00534] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Accepted: 07/12/2019] [Indexed: 11/13/2022] Open
Abstract
Malaria is among the leading causes of death worldwide. The emergence of Plasmodium falciparum resistant strains with reduced sensitivity to the first line combination therapy and suboptimal responses to insecticides used for Anopheles vector management have led to renewed interest in novel therapeutic options. Here, we report the development and validation of an ensemble of ligand-based computational models capable of identifying falcipain-2 inhibitors, and their subsequent application in the virtual screening of DrugBank and Sweetlead libraries. Among four hits submitted to enzymatic assays, two (odanacatib, an abandoned investigational treatment for osteoporosis and bone metastasis, and the antibiotic methacycline) confirmed inhibitory effects on falcipain-2, with Ki of 98.2 nM and 84.4 μM. Interestingly, Methacycline proved to be a non-competitive inhibitor (α = 1.42) of falcipain-2. The effects of both hits on falcipain-2 hemoglobinase activity and on the development of P. falciparum were also studied.
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Affiliation(s)
- Lucas N Alberca
- Laboratory of Bioactive Compounds Research and Development (LIDeB), Department of Biological Sciences, Exact Sciences College, Universidad Nacional de La Plata, La Plata, Argentina
| | - Sara R Chuguransky
- Laboratory of Bioactive Compounds Research and Development (LIDeB), Department of Biological Sciences, Exact Sciences College, Universidad Nacional de La Plata, La Plata, Argentina
| | - Cora L Álvarez
- Departamento de Biodiversidad y Biología Experimental, Facultad de Farmacia y Bioquímica, Facultad de Ciencias Exactas y Naturales, Consejo Nacional de Investigaciones Científicas y Técnicas, Instituto de Química y Fisico-Química Biológicas (IQUIFIB) "Prof. Alejandro C. Paladini", Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Alan Talevi
- Laboratory of Bioactive Compounds Research and Development (LIDeB), Department of Biological Sciences, Exact Sciences College, Universidad Nacional de La Plata, La Plata, Argentina
| | - Emir Salas-Sarduy
- Instituto de Investigaciones Biotecnológicas "Dr. Rodolfo Ugalde", Universidad Nacional de San Martín, CONICET, Buenos Aires, Argentina
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26
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Zyserman I, Mondal D, Sarabia F, McKerrow JH, Roush WR, Debnath A. Identification of cysteine protease inhibitors as new drug leads against Naegleria fowleri. Exp Parasitol 2018; 188:36-41. [PMID: 29551628 DOI: 10.1016/j.exppara.2018.03.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2018] [Accepted: 03/13/2018] [Indexed: 10/17/2022]
Abstract
Primary amebic meningoencephalitis (PAM) is a rapidly fatal infection caused by the free-living ameba Naegleria fowleri. PAM occurs principally in healthy children of less than 13 years old with a history of recent exposure to warm fresh water. While as yet not a reportable disease, the Centers for Disease Control and Prevention (CDC) documents a total of 143 cases in the United States. Only four patients have survived. Infection results from water containing N. fowleri entering the nose, followed by migration of the amebae to the brain. Within the brain, N. fowleri infection results in extensive necrosis, leading to death in 3-7 days. Mortality among patients with PAM is greater than 95%. The drugs of choice in treating PAM are the antifungal amphotericin B, and the antileishmanial, miltefosine. However neither drug is FDA-approved for this indication and the use of amphotericin B is associated with severe adverse effects. Moreover, very few patients treated with amphotericin B have survived PAM. Therefore, development of new, safe and effective drugs is a critical unmet need to avert future deaths of children. The molecular mechanisms underlying the pathogenesis of PAM are poorly understood but it is known that cysteine proteases of N. fowleri play a role in the progression of PAM. We therefore assessed the in vitro activity of the synthetic vinyl sulfone cysteine protease inhibitor, K11777, and 33 analogs with valine, phenylalanine or pyridylalanine at P2 position, against cysteine protease activity in the lysate of N. fowleri. Inhibitors with phenylalanine or pyridylalanine at P2 position were particularly effective in inhibiting the cysteine protease activity of N. fowleri cell lysate with IC50 ranging between 3 nM and 6.6 μM. Three of the 34 inhibitors also showed inhibitory activity against N. fowleri in a cell viability assay and were 1.6- to 2.5-fold more potent than the standard of care drug miltefosine. Our study provides the first evidence of the activity of synthetic, small molecule cysteine protease inhibitors against N. fowleri.
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Affiliation(s)
- Ingrid Zyserman
- Center for Discovery and Innovation in Parasitic Diseases, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, 9500 Gilman Drive, MC0755, La Jolla, CA 92093-0755, USA
| | - Deboprosad Mondal
- The Scripps Research Institute, Scripps Florida, 130 Scripps Way #3A2, Jupiter, FL 33458, USA
| | - Francisco Sarabia
- The Scripps Research Institute, Scripps Florida, 130 Scripps Way #3A2, Jupiter, FL 33458, USA
| | - James H McKerrow
- Center for Discovery and Innovation in Parasitic Diseases, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, 9500 Gilman Drive, MC0755, La Jolla, CA 92093-0755, USA
| | - William R Roush
- The Scripps Research Institute, Scripps Florida, 130 Scripps Way #3A2, Jupiter, FL 33458, USA
| | - Anjan Debnath
- Center for Discovery and Innovation in Parasitic Diseases, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, 9500 Gilman Drive, MC0755, La Jolla, CA 92093-0755, USA.
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27
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Mahmoud MSED, Ibrahim AN, Badawy AF, Abdelmoniem NM. Effect of phenyl vinyl sulphone cysteine protease inhibitor on Schistosoma mansoni: in vitro and in vivo experimental studies. J Parasit Dis 2017; 41:1049-1058. [PMID: 29114141 PMCID: PMC5660033 DOI: 10.1007/s12639-017-0933-3] [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: 03/15/2017] [Accepted: 06/19/2017] [Indexed: 10/19/2022] Open
Abstract
The present work aimed to study the effect of phenyl vinyl sulphone (PVS), a CPI, on different stages of Schistosoma (S.) mansoni in an in vitro culture study and in experimentally infected mice, compared to PZQ. As regards the in vitro study, different concentrations of PVS (1, 2, 4, 6, 8 and 10 µg/ml) and PZQ (1 µg/ml) were assessed by % worm mortality for schistosomula and adults, and hemoglobin degradation by schistosomula. In vivo study included 8 groups of mice. Intraperitoneal PVS, subgroup (a), and oral PZQ, subgroup (b), were assessed at different durations post infection (pi); at 1, 3, 5 and 7 weeks pi (groups I, II, III and IV, respectively). Infection, PVS, PZQ, and normal control groups (groups V-VIII) were included. The anti-schistosomal effects of PVS were assessed by parasitological, histopathological and haematological parameters. In in vitro study, PVS had a schistosomicidal effect in a concentration and time dependent manner, PVS showed 100% schistosomula mortality at day 2 and 92% adult worm mortality at day 5. Furthermore, PVS decreased hemoglobin degradation by schistosomula. In in vivo study, PVS showed a decrease in total worm burden and tissue egg load in intestine and liver with an increase in number of dead ova in intestine of mice. Furthermore, PVS resulted in a decrease in number, size and cellularity of hepatic granulomas and an increase in hemoglobin concentration.PVS was better than PZQ in reducing each of tissue egg count in intestine at 5 and 7 weeks pi, and hepatic granuloma size at 3, 5 and 7 weeks pi. These results suggest that PVS can be a promising chemotherapeutic agent in Schistosoma mansoni infection.
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Affiliation(s)
| | - Ayman Nabil Ibrahim
- Faculty of Medicine, Ain-Shams University, Ramsis St., Abbassia, Cairo, 11566 Egypt
| | - Abeer Fathy Badawy
- Faculty of Medicine, Ain-Shams University, Ramsis St., Abbassia, Cairo, 11566 Egypt
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28
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Synthesis and Evaluation of Thiochroman-4-One Derivatives as Potential Leishmanicidal Agents. Molecules 2017; 22:molecules22122041. [PMID: 29186046 PMCID: PMC6149949 DOI: 10.3390/molecules22122041] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 11/20/2017] [Accepted: 11/20/2017] [Indexed: 01/11/2023] Open
Abstract
The S-containing heterocyclic compounds benzothiopyrans or thiochromones stand out as having promising biological activities due to their structural relationship with chromones (benzopyrans), which are widely known as privileged scaffolds in medicinal chemistry. In this work, we report the synthesis of 35 thiochromone derivatives and the in vitro antileishmanial and cytotoxic activities. Compounds were tested against intracellular amastigotes of Leishmania panamensis and cytotoxic activity against human monocytes (U-937 ATCC CRL-1593.2). Compounds bearing a vinyl sulfone moiety, 4h, 4i, 4j, 4k, 4l and 4m, displayed the highest antileishmanial activity, with EC50 values lower than 10 μM and an index of selectivity over 100 for compounds 4j and 4l. When the double bond or the sulfone moiety was removed, the activity decreased. Our results show that thiochromones bearing a vinyl sulfone moiety are endowed with high antileishmanial activity and low cytotoxicity.
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29
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Kumar P, Kadyan K, Duhan M, Sindhu J, Singh V, Saharan BS. Design, synthesis, conformational and molecular docking study of some novel acyl hydrazone based molecular hybrids as antimalarial and antimicrobial agents. Chem Cent J 2017; 11:115. [PMID: 29138944 PMCID: PMC5686033 DOI: 10.1186/s13065-017-0344-7] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Accepted: 11/02/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Acyl hydrazones are an important class of heterocyclic compounds promising pharmacological characteristics. Malaria is a life-threatening mosquito-borne blood disease caused by a plasmodium parasite. In some places, malaria can be treated and controlled with early diagnosis. However, some countries lack the resources to do this effectively. RESULTS The present work involves the design and synthesis of some novel acyl hydrazone based molecular hybrids of 1,4-dihydropyridine and pyrazole (5a-g). These molecular hybrids were synthesised by condensation of 1,4-dihydropyridin-4-yl-phenoxyacetohydrazides with differently substituted pyrazole carbaldehyde. The final compound (5) showed two conformations (the major, E, s-cis and the minor, E, s-trans) as revealed by NMR spectral data and further supported by the energy calculations (MOPAC2016 using PM7 method). All the synthesised compounds were screened for their in vitro antimalarial activities against chloroquine-sensitive malaria parasite Plasmodium falciparum (3D7) and antimicrobial activity against Gram positive bacteria i.e. Bacillus cereus, Gram negative bacteria i.e. Escherichia coli and antifungal activity against one fungus i.e. Aspergillus niger [corrected]. All these compounds were found more potent than chloroquine and clotrimazole, the standard drugs. CONCLUSIONS In vitro antiplasmodial IC50 value of the most potent compound 5d was found to be 4.40 nM which is even less than all the three reference drugs chloroquine (18.7 nM), pyrimethamine (11 nM) and artimisinin (6 nM). In silico binding study of compound 5d with plasmodial cysteine protease falcipain-2 indicated the inhibition of falcipain-2 as the probable reason for the antimalarial potency of compound 5d. All the compounds had shown good to excellent antimicrobial and antifungal activities.
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Affiliation(s)
- Parvin Kumar
- Department of Chemistry, Kurukshetra University, Kurukshetra, 136119, India.
| | - Kulbir Kadyan
- Department of Chemistry, Kurukshetra University, Kurukshetra, 136119, India
| | - Meenakshi Duhan
- Department of Chemistry, Kurukshetra University, Kurukshetra, 136119, India
| | | | - Vineeta Singh
- National Institute of Malaria Research, Dwarka, New Delhi, 110077, India
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30
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Previti S, Ettari R, Cosconati S, Amendola G, Chouchene K, Wagner A, Hellmich UA, Ulrich K, Krauth-Siegel RL, Wich PR, Schmid I, Schirmeister T, Gut J, Rosenthal PJ, Grasso S, Zappalà M. Development of Novel Peptide-Based Michael Acceptors Targeting Rhodesain and Falcipain-2 for the Treatment of Neglected Tropical Diseases (NTDs). J Med Chem 2017; 60:6911-6923. [PMID: 28763614 DOI: 10.1021/acs.jmedchem.7b00405] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
This paper describes the development of a class of peptide-based inhibitors as novel antitrypanosomal and antimalarial agents. The inhibitors are based on a characteristic peptide sequence for the inhibition of the cysteine proteases rhodesain of Trypanosoma brucei rhodesiense and falcipain-2 of Plasmodium falciparum. We exploited the reactivity of novel unsaturated electrophilic functions such as vinyl-sulfones, -ketones, -esters, and -nitriles. The Michael acceptors inhibited both rhodesain and falcipain-2, at nanomolar and micromolar levels, respectively. In particular, the vinyl ketone 3b has emerged as a potent rhodesain inhibitor (k2nd = 67 × 106 M-1 min-1), endowed with a picomolar binding affinity (Ki = 38 pM), coupled with a single-digit micromolar activity against Trypanosoma brucei brucei (EC50 = 2.97 μM), thus being considered as a novel lead compound for the discovery of novel effective antitrypanosomal agents.
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Affiliation(s)
- Santo Previti
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina , Viale Annunziata, 98168 Messina, Italy
| | - Roberta Ettari
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina , Viale Annunziata, 98168 Messina, Italy
| | - Sandro Cosconati
- DiSTABiF, University of Campania Luigi Vanvitelli , Via Vivaldi 43, 81100 Caserta, Italy
| | - Giorgio Amendola
- DiSTABiF, University of Campania Luigi Vanvitelli , Via Vivaldi 43, 81100 Caserta, Italy
| | - Khawla Chouchene
- Laboratoire de Chimie des Substances Naturelles UR/11-ES-74, Faculté des Sciences de Sfax, Université de Sfax , Route de l'aeroport, 3000 Sfax, Tunisia
| | - Annika Wagner
- Institute of Pharmacy and Biochemistry, University of Mainz , Johann-Joachim-Becherweg 30, DE 55128 Mainz, Germany.,Centre for Biomolecular Magnetic Resonance (BMRZ), Goethe-University Frankfurt , Max-von-Laue-Strasse 9, DE 60438 Frankfurt am Main, Germany
| | - Ute A Hellmich
- Institute of Pharmacy and Biochemistry, University of Mainz , Johann-Joachim-Becherweg 30, DE 55128 Mainz, Germany.,Centre for Biomolecular Magnetic Resonance (BMRZ), Goethe-University Frankfurt , Max-von-Laue-Strasse 9, DE 60438 Frankfurt am Main, Germany
| | - Kathrin Ulrich
- Biochemistry Center, Heidelberg University , Im Neuenheimer Feld 328, DE 69120 Heidelberg, Germany
| | - R Luise Krauth-Siegel
- Biochemistry Center, Heidelberg University , Im Neuenheimer Feld 328, DE 69120 Heidelberg, Germany
| | - Peter R Wich
- Institute of Pharmacy and Biochemistry, University of Mainz , Staudingerweg 5, DE 55128 Mainz, Germany
| | - Ira Schmid
- Institute of Pharmacy and Biochemistry, University of Mainz , Staudingerweg 5, DE 55128 Mainz, Germany
| | - Tanja Schirmeister
- Institute of Pharmacy and Biochemistry, University of Mainz , Staudingerweg 5, DE 55128 Mainz, Germany
| | - Jiri Gut
- Department of Medicine, San Francisco General Hospital, University of California , 1001 Potrero Avenue, San Francisco, California 94110, United States
| | - Philip J Rosenthal
- Department of Medicine, San Francisco General Hospital, University of California , 1001 Potrero Avenue, San Francisco, California 94110, United States
| | - Silvana Grasso
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina , Viale Annunziata, 98168 Messina, Italy
| | - Maria Zappalà
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina , Viale Annunziata, 98168 Messina, Italy
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31
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Roy KK. Targeting the active sites of malarial proteases for antimalarial drug discovery: approaches, progress and challenges. Int J Antimicrob Agents 2017; 50:287-302. [PMID: 28668681 DOI: 10.1016/j.ijantimicag.2017.04.006] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 04/12/2017] [Accepted: 04/27/2017] [Indexed: 02/08/2023]
Abstract
Malaria is an infectious disease causing vast mortality and morbidity worldwide. Although antimalarial drugs are effective in several parts of the world, there is a serious threat to malaria control as malaria parasites are continuously developing widespread resistance against currently available antimalarial drugs, including artemisinin. Such widespread antimalarial drug resistance confirms the need to improve the efficacy of existing or new drugs as well as to develop alternative treatments through the identification of novel drug targets and the development of candidate drugs. Similar to proteases in other parasitic diseases such as leishmaniasis, schistosomiasis, Chagas disease and African sleeping sickness, malarial proteases constitute the major virulence factors in malaria. Malarial proteases belong to several classes and many of them have been targeted for the design and discovery of antimalarial agents. This review summarises the approaches, progress and challenges in the design of small-molecule inhibitors as antimalarial drugs targeting the inhibition of various malarial proteases.
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Affiliation(s)
- Kuldeep K Roy
- National Institute of Pharmaceutical Education and Research (NIPER), 4 Raja S.C. Mullick Road, Jadavpur, Kolkata 700032, West Bengal, India.
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32
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Bacherikov VA, Chittiboyina AG, Avery MA. Design, Synthesis, and Biological Evaluation of Peptidomimetic N-Substituted Cbz-4-Hyp-Hpa-Amides as Novel Inhibitors of Plasmodium falciparum. Chem Biodivers 2017; 14. [PMID: 28498611 DOI: 10.1002/cbdv.201700037] [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: 01/29/2017] [Accepted: 05/08/2017] [Indexed: 11/10/2022]
Abstract
A new series of peptidomimetic N-substituted Cbz-4-Hyp-Hpa-amides were designed, synthesized, and evaluated for inhibition of the Plasmodium falciparum. Substituents on the N-atom of the amide group were selected alkyl-, allyl-, aryl-, 2-hydroxyethyl-, 2-cyanoethyl-, cyanomethyl-, 2-hydroxyethyl-, 2,2-diethoxyethyl-, or 2-ethoxy-2-oxoethylamino groups, and about of 40 new compounds were synthesized and evaluated for antiplasmodial activity in vitro. Antimalarial activity has been investigated as for the final peptide mimetics, and their immediate predecessors, carrying TBDMS or TBDPS protecting groups on 4-hydroxyproline residue and 18 derivatives exhibited toxicity against P. falciparum. Of these agents, compound 23e was shown to have potent antimalarial activity with IC50 528 ng/ml.
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Affiliation(s)
- Valeriy A Bacherikov
- Department of Medicinal Chemistry and Biology, Odessa Medical Institute, International Humanitarian University, Fontanskaya road, 33, Odessa, 65009, Ukraine
| | - Amar G Chittiboyina
- National Center for Natural Products Research, University of Mississippi, Oxford, MS, 38677, USA.,Department of BioMolecular Sciences, School of Pharmacy, University of Mississippi, Oxford, MS, 38677, USA
| | - Mitchell A Avery
- National Center for Natural Products Research, University of Mississippi, Oxford, MS, 38677, USA.,Department of BioMolecular Sciences, School of Pharmacy, University of Mississippi, Oxford, MS, 38677, USA
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33
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Vijayaraghavan S, Mahajan S. Docking, synthesis and antimalarial activity of novel 4-anilinoquinoline derivatives. Bioorg Med Chem Lett 2017; 27:1693-1697. [PMID: 28318947 DOI: 10.1016/j.bmcl.2017.03.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Revised: 02/27/2017] [Accepted: 03/02/2017] [Indexed: 11/25/2022]
Abstract
A series of 4-anilinoquinoline triazine derivatives were designed, synthesized and screened for in vivo antimalarial activity against a chloroquine-sensitive strain of Plasmodium berghei. The compounds were further subjected to in vitro antimalarial activity against chloroquine-resistant W2 strain of Plasmodium falciparum and β-haematin inhibition studies. All the compounds exhibited in vivo antimalarial activity better than that shown by the standard drug, chloroquine. Twelve out of fifteen compounds showed better inhibition than that of chloroquine against chloroquine-resistant W2 strain of Plasmodium falciparum. Ten compounds showed β-haematin inhibition, better than that of chloroquine, with IC50 values in the range of 18-25µM. One compound, 3k, was found to be better than artemisinin against W2 strain of Plasmodium falciparum and also displayed the best β-haematin inhibitory activity, thereby becoming eligible to be explored as a potential lead for antimalarial chemotherapy.
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Affiliation(s)
- Shilpa Vijayaraghavan
- Department of Pharmaceutical Chemistry, C.U. Shah College of Pharmacy, S.N.D.T. Women's University, Sir Vithaldas Vidyavihar, Santacruz (W), Mumbai 400049, India.
| | - Supriya Mahajan
- Department of Pharmaceutical Chemistry, C.U. Shah College of Pharmacy, S.N.D.T. Women's University, Sir Vithaldas Vidyavihar, Santacruz (W), Mumbai 400049, India
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34
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Falcão AS, Carvalho LAR, Lidónio G, Vaz AR, Lucas SD, Moreira R, Brites D. Dipeptidyl Vinyl Sulfone as a Novel Chemical Tool to Inhibit HMGB1/NLRP3-Inflammasome and Inflamma-miRs in Aβ-Mediated Microglial Inflammation. ACS Chem Neurosci 2017; 8:89-99. [PMID: 27797173 DOI: 10.1021/acschemneuro.6b00250] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Rapid microglial activation and associated inflammatory pathways contribute to immune-defense and tissue repair in the central nervous system (CNS). However, persistent activation of these cells will ultimately result in vast production of pro-inflammatory mediators and other neurotoxic factors, which may induce neuronal damage and contribute to chronic neurodegenerative diseases, as Alzheimer's disease (AD). Therefore, small molecules with immunomodulatory effects on microglia may be considered as potential tools to counteract their proinflammatory phenotype and neuroimmune dysregulation in such disorders. Indeed, reducing amyloid-β (Aβ)-induced microglia activation is believed to be effective in treating AD. In this study, we investigated whether dipeptidyl vinyl sulfone (VS) was able to attenuate Aβ-mediated inflammatory response using a mouse microglial (N9) cell line and a solution containing a mixture of Aβ aggregates. We show that low levels of VS are able to prevent cell death while reducing microglia phagocytosis upon Aβ treatment. VS also suppressed Aβ-induced expression of inflammatory mediators in microglia, such as matrix metalloproteinase (MMP)-2 and MMP-9, as well as high-mobility group box protein-1 (HMGB1), nod-like receptor protein 3 (NLRP3)-inflammasome, and interleukin (IL)-1β. Interestingly, increased expression of the two critical inflammation-related microRNAs (miR)-155 and miR-146a in microglia upon Aβ treatment was also prevented by VS coincubation. Taken together, VS emerges as a potential new therapeutic strategy worthy of further investigation in improved cellular and animal models of AD.
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Affiliation(s)
- Ana S. Falcão
- Neuron
Glia Biology in Health and Disease Group, Research Institute
for Medicines (iMed.ULisboa), ‡Department of Biochemistry and Human Biology, §Medicinal Chemistry
Group, Research Institute for Medicines (iMed.ULisboa), and ∥Department of
Pharmaceutical Chemistry and Therapeutics, Faculty of Pharmacy, Universidade de Lisboa, Avenida Professor Gama Pinto, 1649-003 Lisbon, Portugal
| | - Luís A. R. Carvalho
- Neuron
Glia Biology in Health and Disease Group, Research Institute
for Medicines (iMed.ULisboa), ‡Department of Biochemistry and Human Biology, §Medicinal Chemistry
Group, Research Institute for Medicines (iMed.ULisboa), and ∥Department of
Pharmaceutical Chemistry and Therapeutics, Faculty of Pharmacy, Universidade de Lisboa, Avenida Professor Gama Pinto, 1649-003 Lisbon, Portugal
| | - Gonçalo Lidónio
- Neuron
Glia Biology in Health and Disease Group, Research Institute
for Medicines (iMed.ULisboa), ‡Department of Biochemistry and Human Biology, §Medicinal Chemistry
Group, Research Institute for Medicines (iMed.ULisboa), and ∥Department of
Pharmaceutical Chemistry and Therapeutics, Faculty of Pharmacy, Universidade de Lisboa, Avenida Professor Gama Pinto, 1649-003 Lisbon, Portugal
| | - Ana R. Vaz
- Neuron
Glia Biology in Health and Disease Group, Research Institute
for Medicines (iMed.ULisboa), ‡Department of Biochemistry and Human Biology, §Medicinal Chemistry
Group, Research Institute for Medicines (iMed.ULisboa), and ∥Department of
Pharmaceutical Chemistry and Therapeutics, Faculty of Pharmacy, Universidade de Lisboa, Avenida Professor Gama Pinto, 1649-003 Lisbon, Portugal
| | - Susana D. Lucas
- Neuron
Glia Biology in Health and Disease Group, Research Institute
for Medicines (iMed.ULisboa), ‡Department of Biochemistry and Human Biology, §Medicinal Chemistry
Group, Research Institute for Medicines (iMed.ULisboa), and ∥Department of
Pharmaceutical Chemistry and Therapeutics, Faculty of Pharmacy, Universidade de Lisboa, Avenida Professor Gama Pinto, 1649-003 Lisbon, Portugal
| | - Rui Moreira
- Neuron
Glia Biology in Health and Disease Group, Research Institute
for Medicines (iMed.ULisboa), ‡Department of Biochemistry and Human Biology, §Medicinal Chemistry
Group, Research Institute for Medicines (iMed.ULisboa), and ∥Department of
Pharmaceutical Chemistry and Therapeutics, Faculty of Pharmacy, Universidade de Lisboa, Avenida Professor Gama Pinto, 1649-003 Lisbon, Portugal
| | - Dora Brites
- Neuron
Glia Biology in Health and Disease Group, Research Institute
for Medicines (iMed.ULisboa), ‡Department of Biochemistry and Human Biology, §Medicinal Chemistry
Group, Research Institute for Medicines (iMed.ULisboa), and ∥Department of
Pharmaceutical Chemistry and Therapeutics, Faculty of Pharmacy, Universidade de Lisboa, Avenida Professor Gama Pinto, 1649-003 Lisbon, Portugal
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35
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Sharafi-Kolkeshvandi M, Nematollahi D, Nikpour F, Bayat M, Soltani E. Electrochemical behavior of 2-aminodiphenylamine and efficient factors on the site-selectivity of sulfonylation reaction: Experimental and theoretical studies. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.11.046] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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36
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Schmidt I, Pradel G, Sologub L, Golzmann A, Ngwa CJ, Kucharski A, Schirmeister T, Holzgrabe U. Bistacrine derivatives as new potent antimalarials. Bioorg Med Chem 2016; 24:3636-42. [PMID: 27316542 DOI: 10.1016/j.bmc.2016.06.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Revised: 05/30/2016] [Accepted: 06/02/2016] [Indexed: 10/21/2022]
Abstract
Linking two tacrine molecules results in a tremendous increase of activity against Plasmodia in comparison to the monomer. This finding prompted the synthesis of a library of monomeric and dimeric tacrine derivatives in order to derive structure-activity relationships. The most active compounds towards chloroquine sensitive Plasmodium strain 3D7 and chloroquine resistant strain Dd2 show IC50 values in the nanomolar range of concentration, low cytotoxicity and target the cysteine protease falcipain-2, which is essential for parasite growth.
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Affiliation(s)
- Ines Schmidt
- Institute of Pharmacy and Food Chemistry, University of Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Gabriele Pradel
- Institute of Molecular Biotechnology, RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany
| | - Ludmilla Sologub
- Institute of Molecular Biotechnology, RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany
| | - Alexandra Golzmann
- Institute of Molecular Biotechnology, RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany
| | - Che J Ngwa
- Institute of Molecular Biotechnology, RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany
| | - Anna Kucharski
- Institute of Pharmacy and Food Chemistry, University of Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Tanja Schirmeister
- Institute of Pharmacy and Biochemistry, University of Mainz, Staudinger Weg 5, 55099 Mainz, Germany
| | - Ulrike Holzgrabe
- Institute of Pharmacy and Food Chemistry, University of Würzburg, Am Hubland, 97074 Würzburg, Germany.
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37
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Meesin J, Katrun P, Reutrakul V, Pohmakotr M, Soorukram D, Kuhakarn C. Decarboxylative sulfonylation of arylpropiolic acids with sulfinic acids: synthesis of (E)-vinyl sulfones. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.01.042] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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38
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Kiemele ER, Wathier M, Bichler P, Love JA. Total Synthesis of K777: Successful Application of Transition-Metal-Catalyzed Alkyne Hydrothiolation toward the Modular Synthesis of a Potent Cysteine Protease Inhibitor. Org Lett 2016; 18:492-5. [PMID: 26811991 DOI: 10.1021/acs.orglett.5b03535] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
We report the total synthesis of K777 and a series of analogues via alkyne hydrothiolation catalyzed by Wilkinson's complex (ClRh(PPh3)3). The alkyne hydrothiolation reactions proceeded with excellent regio- and diastereoselectivity to generate the desired E-linear vinyl sulfides in high yield. The use of Ellman's auxiliary generates the requisite propargyl amines in excellent enantiomeric excess (ee) and obviates the use of L-homophenylalanine, an expensive unnatural amino acid. The vinyl sulfone derivatives exhibit a large difference in rate toward Michael addition. Kinetic data are consistent with rate-limiting nucleophilic attack to generate the carbanion intermediate.
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Affiliation(s)
- Erica R Kiemele
- Department of Chemistry, 2036 Main Mall, The University of British Columbia , Vancouver, BC, Canada , V6T 1Z1
| | - Matthew Wathier
- Department of Chemistry, 2036 Main Mall, The University of British Columbia , Vancouver, BC, Canada , V6T 1Z1
| | - Paul Bichler
- Department of Chemistry, 2036 Main Mall, The University of British Columbia , Vancouver, BC, Canada , V6T 1Z1
| | - Jennifer A Love
- Department of Chemistry, 2036 Main Mall, The University of British Columbia , Vancouver, BC, Canada , V6T 1Z1
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39
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Jones BD, Tochowicz A, Tang Y, Cameron MD, McCall LI, Hirata K, Siqueira-Neto JL, Reed SL, McKerrow JH, Roush WR. Synthesis and Evaluation of Oxyguanidine Analogues of the Cysteine Protease Inhibitor WRR-483 against Cruzain. ACS Med Chem Lett 2016; 7:77-82. [PMID: 26819670 DOI: 10.1021/acsmedchemlett.5b00336] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2015] [Accepted: 12/07/2015] [Indexed: 11/29/2022] Open
Abstract
A series of oxyguanidine analogues of the cysteine protease inhibitor WRR-483 were synthesized and evaluated against cruzain, the major cysteine protease of the protozoan parasite Trypanosoma cruzi. Kinetic analyses of these analogues indicated that they have comparable potency to previously prepared vinyl sulfone cruzain inhibitors. Co-crystal structures of the oxyguanidine analogues WRR-666 (4) and WRR-669 (7) bound to cruzain demonstrated different binding interactions with the cysteine protease, depending on the aryl moiety of the P1' inhibitor subunit. Specifically, these data demonstrate that WRR-669 is bound noncovalently in the crystal structure. This represents a rare example of noncovalent inhibition of a cysteine protease by a vinyl sulfone inhibitor.
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Affiliation(s)
- Brian D. Jones
- Department
of Chemistry, The Scripps Research Institute, 130 Scripps Way, Jupiter, Florida 33458, United States
| | - Anna Tochowicz
- Department
of Pathology and Sandler Center for Drug Discovery, University of California-San Francisco, 1700 Fourth Street, San
Francisco, California 94158-2250, United States
| | - Yinyan Tang
- Small
Molecule Discovery Center, University of California-San Francisco, 1700 Fourth Street, San Francisco, California 94158-2250, United States
| | - Michael D. Cameron
- Department
of Molecular Therapeutics, The Scripps Research Institute, 130 Scripps
Way, Jupiter, Florida 33458, United States
| | - Laura-Isobel McCall
- Skaggs
School of Pharmacy and Pharmaceutical Sciences, University of California-San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Ken Hirata
- Department
of Pathology, University of California-San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Jair L. Siqueira-Neto
- Skaggs
School of Pharmacy and Pharmaceutical Sciences, University of California-San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Sharon L. Reed
- Departments
of Pathology and Medicine, University of California-San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
| | - James H. McKerrow
- Department
of Pathology and Sandler Center for Drug Discovery, University of California-San Francisco, 1700 Fourth Street, San
Francisco, California 94158-2250, United States
| | - William R. Roush
- Department
of Chemistry, The Scripps Research Institute, 130 Scripps Way, Jupiter, Florida 33458, United States
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40
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Nie G, Deng X, Lei X, Hu Q, Chen Y. Mn(iii)-mediated regioselective synthesis of (E)-vinyl sulfones from sodium sulfinates and nitro-olefins. RSC Adv 2016. [DOI: 10.1039/c6ra17842a] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A new efficient Mn(iii)-mediated coupling reaction of sodium sulfinates with nitro-olefins is described.
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Affiliation(s)
- Gang Nie
- School of Chemistry and Environmental Engineering
- Wuhan Institute of Technology
- Wuhan 430073
- People's Republic of China
| | - Xiaocong Deng
- School of Chemistry and Environmental Engineering
- Wuhan Institute of Technology
- Wuhan 430073
- People's Republic of China
| | - Xue Lei
- School of Chemistry and Environmental Engineering
- Wuhan Institute of Technology
- Wuhan 430073
- People's Republic of China
| | - Qinquan Hu
- School of Chemistry and Environmental Engineering
- Wuhan Institute of Technology
- Wuhan 430073
- People's Republic of China
| | - Yunfeng Chen
- School of Chemistry and Environmental Engineering
- Wuhan Institute of Technology
- Wuhan 430073
- People's Republic of China
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41
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Hernández Alvarez L, Naranjo Feliciano D, Hernández González JE, de Oliveira Soares R, Barreto Gomes DE, Pascutti PG. Insights into the Interactions of Fasciola hepatica Cathepsin L3 with a Substrate and Potential Novel Inhibitors through In Silico Approaches. PLoS Negl Trop Dis 2015; 9:e0003759. [PMID: 25978322 PMCID: PMC4433193 DOI: 10.1371/journal.pntd.0003759] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Accepted: 04/14/2015] [Indexed: 11/19/2022] Open
Abstract
Background Fasciola hepatica is the causative agent of fascioliasis, a disease affecting grazing animals, causing economic losses in global agriculture and currently being an important human zoonosis. Overuse of chemotherapeutics against fascioliasis has increased the populations of drug resistant parasites. F. hepatica cathepsin L3 is a protease that plays important roles during the life cycle of fluke. Due to its particular collagenolytic activity it is considered an attractive target against the infective phase of F. hepatica. Methodology/Principal Findings Starting with a three dimensional model of FhCL3 we performed a structure-based design of novel inhibitors through a computational study that combined virtual screening, molecular dynamics simulations, and binding free energy (ΔGbind) calculations. Virtual screening was carried out by docking inhibitors obtained from the MYBRIDGE-HitFinder database inside FhCL3 and human cathepsin L substrate-binding sites. On the basis of dock-scores, five compounds were predicted as selective inhibitors of FhCL3. Molecular dynamic simulations were performed and, subsequently, an end-point method was employed to predict ΔGbind values. Two compounds with the best ΔGbind values (-10.68 kcal/mol and -7.16 kcal/mol), comparable to that of the positive control (-10.55 kcal/mol), were identified. A similar approach was followed to structurally and energetically characterize the interface of FhCL3 in complex with a peptidic substrate. Finally, through pair-wise and per-residue free energy decomposition we identified residues that are critical for the substrate/ligand binding and for the enzyme specificity. Conclusions/Significance The present study is the first computer-aided drug design approach against F. hepatica cathepsins. Here we predict the principal determinants of binding of FhCL3 in complex with a natural substrate by detailed energetic characterization of protease interaction surface. We also propose novel compounds as FhCL3 inhibitors. Overall, these results will foster the future rational design of new inhibitors against FhCL3, as well as other F. hepatica cathepsins. Fascioliosis is considered an emerging disease in humans, causing important losses in global agriculture through the infection of livestock animals. The outcome of resistant parasites has increased the search for new drugs which may contribute to disease control. In recent decades, Fasciola cathepsins (FhCs) have been defined as the principal virulence factors of this parasite. Despite being in the same protein family, they have different specificities and, thus, distinct roles throughout the fluke life cycle. Differences in specificity have been attributed to a few variations in the sequence of key FhCs subsites. Currently, the structure-based drug design of inhibitors against Fasciola cathepsin Ls (FhCLs) with unknown structures is possible due to the availability of the three-dimensional structure of FhCL1. Our detailed structural analysis of the major infective juvenile enzyme (FhCL3) identifies the molecular determinants for protein binding. Also, novel potential inhibitors against FhCL3 are proposed, which might reduce host invasion and penetration processes. These compounds are predicted to interact with the binding site of the enzyme, therefore they could prevent substrate processing by competitive inhibition. The structure-based drug design strategy described here will be useful for the development of new potent and selective inhibitors against other FhCs.
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Affiliation(s)
- Lilian Hernández Alvarez
- Departamento de Biología Molecular, Centro Nacional de Sanidad Agropecuaria de Cuba (CENSA), San José de las Lajas, Mayabeque, Cuba
| | - Dany Naranjo Feliciano
- Departamento de Biología Molecular, Centro Nacional de Sanidad Agropecuaria de Cuba (CENSA), San José de las Lajas, Mayabeque, Cuba
| | | | - Rosemberg de Oliveira Soares
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
- Diretoria de Metrologia Aplicada às Ciências da Vida (DIMAV), Instituto Nacional de Metrologia, Qualidade e Tecnologia (INMETRO), Rio de Janeiro, Brazil
| | - Diego Enry Barreto Gomes
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
- Diretoria de Metrologia Aplicada às Ciências da Vida (DIMAV), Instituto Nacional de Metrologia, Qualidade e Tecnologia (INMETRO), Rio de Janeiro, Brazil
| | - Pedro Geraldo Pascutti
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
- * E-mail:
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42
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From hybrid compounds to targeted drug delivery in antimalarial therapy. Bioorg Med Chem 2015; 23:5120-30. [PMID: 25913864 DOI: 10.1016/j.bmc.2015.04.017] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Revised: 04/01/2015] [Accepted: 04/07/2015] [Indexed: 11/21/2022]
Abstract
The discovery of new drugs to treat malaria is a continuous effort for medicinal chemists due to the emergence and spread of resistant strains of Plasmodium falciparum to nearly all used antimalarials. The rapid adaptation of the malaria parasite remains a major limitation to disease control. Development of hybrid antimalarial agents has been actively pursued as a promising strategy to overcome the emergence of resistant parasite strains. This review presents the journey that started with simple combinations of two active moieties into one chemical entity and progressed into a delivery/targeted system based on major antimalarial classes of drugs. The rationale for providing different mechanisms of action against a single or additional targets involved in the multiple stages of the parasite's life-cycle is highlighted. Finally, a perspective for this polypharmacologic approach is presented.
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43
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Hwu JR, Kapoor M, Tsay SC, Lin CC, Hwang KC, Horng JC, Chen IC, Shieh FK, Leyssen P, Neyts J. Benzouracil-coumarin-arene conjugates as inhibiting agents for chikungunya virus. Antiviral Res 2015; 118:103-9. [PMID: 25839734 DOI: 10.1016/j.antiviral.2015.03.013] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2015] [Revised: 03/24/2015] [Accepted: 03/25/2015] [Indexed: 11/28/2022]
Abstract
Chikungunya virus (CHIKV) is an arbovirus that was first recognized in an epidemic form in East Africa in 1952-1953. The virus is primarily transmitted through mosquitoes and the resulting disease, chikungunya fever, is found in nearly 40 countries. Neither an effective vaccine nor a specific antiviral drug exists for treatments of chikungunya fever. Thus 22 new conjugated compounds of uracil-coumarin-arene were designed and synthesized as potential inhibiting agents. Their chemical structures were determined unambiguously by spectroscopic methods, including single-crystal X-ray diffraction crystallography. The three units in these conjugates were connected by specially designed -SCH2- and -OSO2- joints. Five of these new conjugates were found to inhibit CHIKV in Vero cells with significant potency (EC50 = 10.2-19.1 μM) and showed low toxicity (CC50 = 75.2-178 μM). The selective index values were 8.8-11.5 for three conjugates. By analysis of the data from the anti-viral assays, the structure-activity relationship is derived on the basis of the nature of the uracil, the functional groups attached to the arene, and the joints between the ring units.
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Affiliation(s)
- Jih Ru Hwu
- Department of Chemistry & Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013, Taiwan; Department of Chemistry, National Central University, Jhongli City 32001, Taiwan.
| | - Mohit Kapoor
- Department of Chemistry & Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Shwu-Chen Tsay
- Department of Chemistry, National Central University, Jhongli City 32001, Taiwan.
| | - Chun-Cheng Lin
- Department of Chemistry & Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Kuo Chu Hwang
- Department of Chemistry & Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Jia-Cherng Horng
- Department of Chemistry & Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - I-Chia Chen
- Department of Chemistry & Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Fa-Kuen Shieh
- Department of Chemistry, National Central University, Jhongli City 32001, Taiwan
| | - Pieter Leyssen
- Rega Institute for Medical Research, Katholieke Universiteit Leuven, Minderbroedersstraat 10, B-3000 Leuven, Belgium
| | - Johan Neyts
- Rega Institute for Medical Research, Katholieke Universiteit Leuven, Minderbroedersstraat 10, B-3000 Leuven, Belgium.
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44
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Conroy T, Guo JT, Elias N, Cergol KM, Gut J, Legac J, Khatoon L, Liu Y, McGowan S, Rosenthal PJ, Hunt NH, Payne RJ. Synthesis of gallinamide A analogues as potent falcipain inhibitors and antimalarials. J Med Chem 2014; 57:10557-63. [PMID: 25412465 DOI: 10.1021/jm501439w] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Analogues of the natural product gallinamide A were prepared to elucidate novel inhibitors of the falcipain cysteine proteases. Analogues exhibited potent inhibition of falcipain-2 (FP-2) and falcipain-3 (FP-3) and of the development of Plasmodium falciparum in vitro. Several compounds were equipotent to chloroquine as inhibitors of the 3D7 strain of P. falciparum and maintained potent activity against the chloroquine-resistant Dd2 parasite. These compounds serve as promising leads for the development of novel antimalarial agents.
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Affiliation(s)
- Trent Conroy
- School of Chemistry, The University of Sydney , Building F11, Sydney, New South Wales 2006, Australia
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45
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Jiang Q, Xu B, Jia J, Zhao A, Zhao YR, Li YY, He NN, Guo CC. Copper-catalyzed aerobic decarboxylative sulfonylation of cinnamic acids with sodium sulfinates: stereospecific synthesis of (E)-alkenyl sulfones. J Org Chem 2014; 79:7372-9. [PMID: 25025539 DOI: 10.1021/jo5010845] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A copper-catalyzed aerobic decarboxylative sulfonylation of alkenyl carboxylic acids with sodium sulfinates is developed. This study offers a new and expedient strategy for stereoselective synthesis of (E)-alkenyl sulfones that are widely present in biologically active natural products and therapeutic agents. Moreover, the transformation is proposed to proceed via a radical process and exhibits a broad substrate scope and good functional group tolerance.
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Affiliation(s)
- Qing Jiang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University , Changsha, China
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Abstract
Despite a century of control and eradication campaigns, malaria remains one of the world's most devastating diseases. Our once-powerful therapeutic weapons are losing the war against the Plasmodium parasite, whose ability to rapidly develop and spread drug resistance hamper past and present malaria-control efforts. Finding new and effective treatments for malaria is now a top global health priority, fuelling an increase in funding and promoting open-source collaborations between researchers and pharmaceutical consortia around the world. The result of this is rapid advances in drug discovery approaches and technologies, with three major methods for antimalarial drug development emerging: (i) chemistry-based, (ii) target-based, and (iii) cell-based. Common to all three of these approaches is the unique ability of structural biology to inform and accelerate drug development. Where possible, SBDD (structure-based drug discovery) is a foundation for antimalarial drug development programmes, and has been invaluable to the development of a number of current pre-clinical and clinical candidates. However, as we expand our understanding of the malarial life cycle and mechanisms of resistance development, SBDD as a field must continue to evolve in order to develop compounds that adhere to the ideal characteristics for novel antimalarial therapeutics and to avoid high attrition rates pre- and post-clinic. In the present review, we aim to examine the contribution that SBDD has made to current antimalarial drug development efforts, covering hit discovery to lead optimization and prevention of parasite resistance. Finally, the potential for structural biology, particularly high-throughput structural genomics programmes, to identify future targets for drug discovery are discussed.
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47
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Bertoldo JB, Chiaradia-Delatorre LD, Mascarello A, Leal PC, Cordeiro MNS, Nunes RJ, Sarduy ES, Rosenthal PJ, Terenzi H. Synthetic compounds from an in house library as inhibitors of falcipain-2 from Plasmodium falciparum. J Enzyme Inhib Med Chem 2014; 30:299-307. [PMID: 24964346 DOI: 10.3109/14756366.2014.920839] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Falcipain-2 (FP-2) is a key cysteine protease from the malaria parasite Plasmodium falciparum. Many previous studies have identified FP-2 inhibitors; however, none has yet met the criteria for an antimalarial drug candidate. In this work, we assayed an in-house library of non-peptidic organic compounds, including (E)-chalcones, (E)-N'-benzylidene-benzohydrazides and alkyl-esters of gallic acid, and assessed the activity toward FP-2 and their mechanisms of inhibition. The (E)-chalcones 48, 54 and 66 showed the lowest IC50 values (8.5 ± 0.8 µM, 9.5 ± 0.2 µM and 4.9 ± 1.3 µM, respectively). The best inhibitor (compound 66) demonstrated non-competitive inhibition, and using mass spectrometry and fluorescence spectroscopy assays, we suggest a potential allosteric site for the interaction of this compound, located between the catalytic site and the hemoglobin binding arm in FP-2. We combined structural biology tools and mass spectrometry to characterize the inhibition mechanisms of novel compounds targeting FP-2.
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48
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Wang J, Li F, Li Y, Yang Y, Zhang S, Yang L. Structural features of falcipain-3 inhibitors: an in silico study. MOLECULAR BIOSYSTEMS 2014; 9:2296-310. [PMID: 23765034 DOI: 10.1039/c3mb70105k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Falcipain-3, the major cysteine hemoglobinase from the human malaria parasite Plasmodium falciparum, is critical for parasite development and is considered as a promising chemotherapeutic target. In order to understand the structure-activity correlation of falcipain-3 inhibitors, a set of ligand- and receptor-based 3D-QSAR models were developed in the present work employing comparative molecular field analysis (CoMFA) and comparative molecular similarity indices analysis (CoMSIA) for 247 2-pyrimidinecarbonitrile derivatives. An optimum ligand-based CoMSIA model yielded a cross validation Q(2) = 0.501, non-cross validation Rncv(2) = 0.821 and predictive Rpred(2) = 0.750. In addition, docking analysis and molecular dynamics simulation were applied to elucidate the probable binding modes of the ligand in the falcipain-3 binding pocket. Graphic representation of the results, as contoured 3D coefficient plots, also provides a clue to the reasonable modification of molecules. (1) Bulky substituents at the 3-position, and rings B and D increase the biological activity; (2) electrostatic groups at rings B, C and D are likely helpful to increase the falcipain-3 inhibition; (3) hydrophobic groups at rings B and D are favored; (4) Gly92, Ile94 and Thr95 which formed several H-bonds and a water-bridged H-bond are crucial for falcipain-3 inhibitors. This model, we hope, will be of help in designing and predicting novel falcipain-3 inhibitors.
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Affiliation(s)
- Jinghui Wang
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), Dalian University of Technology, Dalian, Liaoning 116024, PR China.
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49
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Weldon DJ, Shah F, Chittiboyina AG, Sheri A, Chada RR, Gut J, Rosenthal PJ, Shivakumar D, Sherman W, Desai P, Jung JC, Avery MA. Synthesis, biological evaluation, hydration site thermodynamics, and chemical reactivity analysis of α-keto substituted peptidomimetics for the inhibition of Plasmodium falciparum. Bioorg Med Chem Lett 2014; 24:1274-9. [PMID: 24507921 DOI: 10.1016/j.bmcl.2014.01.062] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2014] [Accepted: 01/21/2014] [Indexed: 11/29/2022]
Abstract
A new series of peptidomimetic pseudo-prolyl-homophenylalanylketones were designed, synthesized and evaluated for inhibition of the Plasmodium falciparum cysteine proteases falcipain-2 (FP-2) and falcipain-3 (FP-3). In addition, the parasite killing activity of these compounds in human blood-cultured P. falciparum was examined. Of twenty-two (22) compounds synthesized, one peptidomimetic comprising a homophenylalanine-based α-hydroxyketone linked Cbz-protected hydroxyproline (39) showed the most potency (IC50 80 nM against FP-2 and 60 nM against FP-3). In silico analysis of these peptidomimetic analogs offered important protein-ligand structural insights including the role, by WaterMap, of water molecules in the active sites of these protease isoforms. The pseudo-dipeptide 39 and related compounds may serve as a promising direction forward in the design of competitive inhibitors of falcipains for the effective treatment of malaria.
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Affiliation(s)
- David J Weldon
- School of Pharmacy, Department of Medicinal Chemistry, University of Mississippi, University, MS 38677, United States; School of Pharmacy, Department of Pharmaceutical Sciences, Loma Linda University, Loma Linda, CA 92350, United States
| | - Falgun Shah
- School of Pharmacy, Department of Medicinal Chemistry, University of Mississippi, University, MS 38677, United States
| | - Amar G Chittiboyina
- School of Pharmacy, Department of Medicinal Chemistry, University of Mississippi, University, MS 38677, United States; National Center for Natural Products Research, University of Mississippi, University, MS 38677, United States
| | - Anjaneyulu Sheri
- School of Pharmacy, Department of Medicinal Chemistry, University of Mississippi, University, MS 38677, United States
| | - Raji Reddy Chada
- School of Pharmacy, Department of Medicinal Chemistry, University of Mississippi, University, MS 38677, United States
| | - Jiri Gut
- Department of Medicine, San Francisco General Hospital, University of California, San Francisco, CA 94143, United States
| | - Philip J Rosenthal
- Department of Medicine, San Francisco General Hospital, University of California, San Francisco, CA 94143, United States
| | - Develeena Shivakumar
- Schrodinger, Inc., 120 West 45th Street, 17th Floor, New York, NY 10036, United States
| | - Woody Sherman
- Schrodinger, Inc., 120 West 45th Street, 17th Floor, New York, NY 10036, United States
| | - Prashant Desai
- School of Pharmacy, Department of Medicinal Chemistry, University of Mississippi, University, MS 38677, United States
| | - Jae-Chul Jung
- School of Pharmacy, Department of Medicinal Chemistry, University of Mississippi, University, MS 38677, United States
| | - Mitchell A Avery
- School of Pharmacy, Department of Medicinal Chemistry, University of Mississippi, University, MS 38677, United States; National Center for Natural Products Research, University of Mississippi, University, MS 38677, United States.
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50
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Yadav N, Sharma C, Awasthi SK. Diversification in the synthesis of antimalarial trioxane and tetraoxane analogs. RSC Adv 2014. [DOI: 10.1039/c3ra42513d] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
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