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Ferreira GM, Kronenberger T, Maltarollo VG, Poso A, de Moura Gatti F, Almeida VM, Marana SR, Lopes CD, Tezuka DY, de Albuquerque S, da Silva Emery F, Trossini GHG. Trypanosoma cruzi Sirtuin 2 as a Relevant Druggable Target: New Inhibitors Developed by Computer-Aided Drug Design. Pharmaceuticals (Basel) 2023; 16:ph16030428. [PMID: 36986527 PMCID: PMC10057528 DOI: 10.3390/ph16030428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 02/17/2023] [Accepted: 03/03/2023] [Indexed: 03/14/2023] Open
Abstract
Trypanosoma cruzi, the etiological agent of Chagas disease, relies on finely coordinated epigenetic regulation during the transition between hosts. Herein we targeted the silent information regulator 2 (Sir2) enzyme, a NAD+-dependent class III histone deacetylase, to interfere with the parasites’ cell cycle. A combination of molecular modelling with on-target experimental validation was used to discover new inhibitors from commercially available compound libraries. We selected six inhibitors from the virtual screening, which were validated on the recombinant Sir2 enzyme. The most potent inhibitor (CDMS-01, IC50 = 40 μM) was chosen as a potential lead compound.
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Affiliation(s)
- Glaucio Monteiro Ferreira
- Department of Pharmacy, School of Pharmaceutical Sciences, University of São Paulo, Av Prof Lineu Prestes 580, Building. 13, São Paulo 05508-000, SP, Brazil; (G.M.F.)
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of São Paulo, Av Prof Lineu Prestes 580, Building. 17, São Paulo 05508-000, SP, Brazil
| | - Thales Kronenberger
- Department of Oncology and Pneumonology, Internal Medicine VIII, University Hospital Tübingen, Otfried-Müller-Straße 10, 72076 Tübingen, Germany
- School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, 70211 Kuopio, Finland
| | - Vinicius Gonçalves Maltarollo
- Department of Pharmaceutical Products, Faculty of Pharmacy, Federal University of Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte 31270-901, MG, Brazil
| | - Antti Poso
- Department of Oncology and Pneumonology, Internal Medicine VIII, University Hospital Tübingen, Otfried-Müller-Straße 10, 72076 Tübingen, Germany
- School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, 70211 Kuopio, Finland
| | - Fernando de Moura Gatti
- Department of Pharmacy, School of Pharmaceutical Sciences, University of São Paulo, Av Prof Lineu Prestes 580, Building. 13, São Paulo 05508-000, SP, Brazil; (G.M.F.)
| | - Vitor Medeiros Almeida
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, Av Prof Lineu Prestes 748, Building 12, São Paulo 05508-000, SP, Brazil; (V.M.A.)
| | - Sandro Roberto Marana
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, Av Prof Lineu Prestes 748, Building 12, São Paulo 05508-000, SP, Brazil; (V.M.A.)
| | - Carla Duque Lopes
- Department of Clinical Toxicological and Bromatological Analysis, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Av. do Café, Ribeirão Preto 14040-903, SP, Brazil
| | - Daiane Yukie Tezuka
- Department of Clinical Toxicological and Bromatological Analysis, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Av. do Café, Ribeirão Preto 14040-903, SP, Brazil
| | - Sérgio de Albuquerque
- Department of Clinical Toxicological and Bromatological Analysis, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Av. do Café, Ribeirão Preto 14040-903, SP, Brazil
| | - Flavio da Silva Emery
- Department of Pharmaceutical Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Av. do Café, Ribeirão Preto 14040-903, SP, Brazil
- Correspondence: (F.d.S.E.); (G.H.G.T.); Tel.: +55-11-3091-3793 (G.H.G.T.)
| | - Gustavo Henrique Goulart Trossini
- Department of Pharmacy, School of Pharmaceutical Sciences, University of São Paulo, Av Prof Lineu Prestes 580, Building. 13, São Paulo 05508-000, SP, Brazil; (G.M.F.)
- Correspondence: (F.d.S.E.); (G.H.G.T.); Tel.: +55-11-3091-3793 (G.H.G.T.)
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Gomes SQ, Federico LB, Silva GM, Lopes CD, de Albuquerque S, da Silva CHTDP. Ligand-based virtual screening, molecular dynamics, and biological evaluation of repurposed drugs as inhibitors of Trypanosoma cruzi proteasome. J Biomol Struct Dyn 2023; 41:13844-13856. [PMID: 36826433 DOI: 10.1080/07391102.2023.2182129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Accepted: 02/12/2023] [Indexed: 02/25/2023]
Abstract
Chagas disease is a well-known Neglected Tropical Disease, mostly endemic in continental Latin America, but that has spread to North America and Europe. Unfortunately, current treatments against such disease are ineffective and produce known and undesirable side effects. To find novel effective drug candidates to treat Chagas disease, we uniquely explore the Trypanosoma cruzi proteasome as a recent biological target and, also, apply drug repurposing through different computational methodologies. For this, we initially applied protein homology modeling to build a robust model of proteasome β4/β5 subunits, since there is no crystallographic structure of this target. Then, we used it on a drug repurposing via a virtual screening campaign starting with more than 8,000 drugs and including the methodologies: ligand-based similarity, toxicity predictions, and molecular docking. Three drugs were selected concerning their favorable interactions at the protein binding site and subsequently submitted to molecular dynamics simulations, which allowed us to elucidate their behavior and compare such theoretical results with experimental ones, obtained in biological assays also described in this paper.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Suzane Quintana Gomes
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil
| | - Leonardo Bruno Federico
- Computational Laboratory of Pharmaceutical Chemistry, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Guilherme Martins Silva
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil
| | - Carla Duque Lopes
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Sérgio de Albuquerque
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Carlos Henrique Tomich de Paula da Silva
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil
- Computational Laboratory of Pharmaceutical Chemistry, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
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Souza WA, Ramos LMS, de Almeida AM, Tezuka DY, Lopes CD, Moreira MB, Zanetti RD, Netto AVG, Ferreira FB, de Oliveira RJ, Guedes GP, de Albuquerque S, Silva JRL, Pereira-Maia EC, Resende JALC, de Almeida MV, Guerra W. Preparation, cytotoxic activity and DNA interaction studies of new platinum(II) complexes with 1,10-phenanthroline and 5-alkyl-1,3,4-oxadiazol-2(3H)-thione derivatives. J Inorg Biochem 2022; 237:111993. [PMID: 36108344 DOI: 10.1016/j.jinorgbio.2022.111993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 09/05/2022] [Accepted: 09/05/2022] [Indexed: 01/18/2023]
Abstract
This work describes the synthesis, characterization and in vitro anticancer activity of two platinum(II) complexes of the type [Pt(L1)2(1,10-phen)] 1 and [Pt(L2)2(1,10-phen)] 2, where L1 = 5-heptyl-1,3,4-oxadiazole-2-(3H)-thione, L2 = 5-nonyl-1,3,4-oxadiazole-2-(3H)-thione and 1,10-phen = 1,10-phenanthroline. As to the structure of these complexes, the X-ray structural analysis of 1 indicates that the geometry around the platinum(II) ion is distorted square-planar, where two 5-alkyl-1,3,4-oxadiazol-2-thione derivatives coordinate a platinum(II) ion through the sulfur atom. A chelating bidentate phenanthroline molecule completes the coordination sphere. We tested these complexes in two breast cancer cell lines, namely, MCF-7 (a hormone responsive cancer cell) and MDA-MB-231 (triple negative breast cancer cell). In both cells, the most lipophilic platinum compound, complex 2, was more active than cisplatin, one of the most widely used anticancer drugs nowadays. DNA binding studies indicated that such complexes are able to bind to ct-DNA with Kb values of 104 M-1. According to data from dichroism circular and fluorescence spectroscopy, these complexes appear to bind to the DNA in a non-intercalative, probably via minor groove. Molecular docking followed by semiempirical simulations indicated that these complexes showed favorable interactions with the minor groove of the double helix of ct-DNA in an A-T rich region. Thereafter, flow cytometry analysis showed that complex 2 induced apoptosis and necrosis in MCF-7 cells.
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Affiliation(s)
- Wesley A Souza
- Instituto de Química, Universidade Federal de Uberlândia, Campus Santa Mônica, Uberlândia, MG, Brazil; Instituto de Ciências Exatas e da Terra, Campus Universitário do Araguaia, Universidade Federal do Mato Grosso, Pontal do Araguaia, MT, Brazil
| | - Luana M S Ramos
- Instituto de Química, Universidade Federal de Uberlândia, Campus Santa Mônica, Uberlândia, MG, Brazil
| | - Angelina M de Almeida
- Departamento de Química, Universidade Federal de Juiz de Fora, Juiz de Fora, MG, Brazil
| | - Daiane Y Tezuka
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Carla D Lopes
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Mariete B Moreira
- UNESP - Univ. Estadual Paulista, Institute of Chemistry, Araraquara, SP, Brazil; Departamento de Química, Universidade Estadual de Maringá, PR, Brazil
| | - Renan D Zanetti
- UNESP - Univ. Estadual Paulista, Institute of Chemistry, Araraquara, SP, Brazil
| | - Adelino V G Netto
- UNESP - Univ. Estadual Paulista, Institute of Chemistry, Araraquara, SP, Brazil
| | | | - Ronaldo Junio de Oliveira
- Laboratório de Biofísica Teórica, Departamento de Física, Instituto de Ciências Exatas, Naturais e Educação, Universidade Federal do Triângulo Mineiro, Uberaba, MG, Brazil
| | - Guilherme P Guedes
- Instituto de Química, Universidade Federal Fluminense, Campus Valonguinho, Niterói, RJ, Brazil
| | - Sérgio de Albuquerque
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Júlia R L Silva
- Departamento de Química, Universidade Federal de Minas Gerais, Campus Pampulha, Belo Horizonte, MG, Brazil
| | - Elene C Pereira-Maia
- Departamento de Química, Universidade Federal de Minas Gerais, Campus Pampulha, Belo Horizonte, MG, Brazil
| | - Jackson A L C Resende
- Instituto de Ciências Exatas e da Terra, Campus Universitário do Araguaia, Universidade Federal do Mato Grosso, Pontal do Araguaia, MT, Brazil
| | - Mauro V de Almeida
- Departamento de Química, Universidade Federal de Juiz de Fora, Juiz de Fora, MG, Brazil
| | - Wendell Guerra
- Instituto de Química, Universidade Federal de Uberlândia, Campus Santa Mônica, Uberlândia, MG, Brazil.
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Rodrigues DM, Portapilla GB, Silva GM, Duarte A, Rotta CG, da Silva CHTDP, de Albuquerque S, Bastos JK, Campo VL. Synthesis, antitumor activity and in silico analyses of amino acid derivatives of artepillin C, drupanin and baccharin from green propolis. Bioorg Med Chem 2021; 47:116372. [PMID: 34454129 DOI: 10.1016/j.bmc.2021.116372] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 08/12/2021] [Accepted: 08/13/2021] [Indexed: 12/31/2022]
Abstract
Breast cancer has the highest incidence and mortality in females, while prostate cancer has the second-highest incidence in males. Studies have shown that compounds from Brazilian green propolis have antitumor activities and can selectively inhibit the AKR1C3 enzyme, overexpressed in hormone-dependent prostate and breast tumors. Thus, in an attempt to develop new cytotoxic inhibitors against these cancers, three prenylated compounds, artepillin C, drupanin and baccharin, were isolated from green propolis to synthesize new derivatives via coupling reactions with different amino acids. All obtained derivatives were submitted to antiproliferative assays against four cancer cells (MCF-7, MDA MB-231, PC-3, and DU145) and two normal cell lines (MCF-10A and PNT-2) to evaluate their cytotoxicity. In general, the best activity was observed for compound6e, derived from drupanin, which exhibited half-maximal inhibitory concentration (IC50) of 9.6 ± 3 μM and selectivity index (SI) of 5.5 against MCF-7 cells.In silicostudies demonstrated that these derivatives present coherent docking interactions and binding modes against AKR1C3, which might represent a possible mechanism of inhibition in MCF-7 cells.
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Affiliation(s)
- Débora Munhoz Rodrigues
- School of Pharmaceutical Sciences of Ribeirão Preto - University of São Paulo, Av. do Café S/N, 14040-930 Ribeirão Preto, SP, Brazil
| | - Gisele Bulhões Portapilla
- School of Pharmaceutical Sciences of Ribeirão Preto - University of São Paulo, Av. do Café S/N, 14040-930 Ribeirão Preto, SP, Brazil
| | - Guilherme Martins Silva
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto - University of São Paulo, Av. do Café S/N, 14040-901 Ribeirão Preto, SP, Brazil
| | - Andressa Duarte
- Department of Pathology and Forensic Medicine - University of São Paulo, Av. do Café S/N, 14049-900 Ribeirão Preto Medical School, SP, Brazil
| | - Cristiana Gonçalez Rotta
- School of Pharmaceutical Sciences of Ribeirão Preto - University of São Paulo, Av. do Café S/N, 14040-930 Ribeirão Preto, SP, Brazil
| | - Carlos Henrique Tomich de Paula da Silva
- School of Pharmaceutical Sciences of Ribeirão Preto - University of São Paulo, Av. do Café S/N, 14040-930 Ribeirão Preto, SP, Brazil; Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto - University of São Paulo, Av. do Café S/N, 14040-901 Ribeirão Preto, SP, Brazil
| | - Sérgio de Albuquerque
- School of Pharmaceutical Sciences of Ribeirão Preto - University of São Paulo, Av. do Café S/N, 14040-930 Ribeirão Preto, SP, Brazil
| | - Jairo Kenupp Bastos
- School of Pharmaceutical Sciences of Ribeirão Preto - University of São Paulo, Av. do Café S/N, 14040-930 Ribeirão Preto, SP, Brazil
| | - Vanessa Leiria Campo
- School of Pharmaceutical Sciences of Ribeirão Preto - University of São Paulo, Av. do Café S/N, 14040-930 Ribeirão Preto, SP, Brazil; Barão de Mauá University Center, St. Ramos de Azevedo 423, 14090-180 Ribeirão Preto, SP, Brazil.
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Possato B, Dalmolin LF, Pereira LM, Alves JQ, Silva RTC, Gelamo RV, Yatsuda AP, Lopez RFV, de Albuquerque S, Leite NB, Maia PIDS. Gold(III) complexes with thiosemicarbazonate ligands as potential anticancer agents: Cytotoxicity and interactions with biomolecular targets. Eur J Pharm Sci 2021; 162:105834. [PMID: 33826936 DOI: 10.1016/j.ejps.2021.105834] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 03/17/2021] [Accepted: 03/31/2021] [Indexed: 01/23/2023]
Abstract
Gold(III) complexes have been studied for the past years due to their anticancer properties and great affinity to biotargets, such as enzymes and proteins, which support their pharmacological applications. Within this scope, in this work the antiproliferative activities of two Au(III)-thiosemicarbazonate complexes, [AuClL1] (1, L1: (E,Z)-N-ethyl-N'-(3-nitroso-kN)butan-2-ylidene)carbamohydrazonothioato-k2N2,S) and [Au(Hdamp)L2]Cl (2, L2: N-(N'',N''-diethylaminothiocarbonyl)-N'(N''', N'''-dimethylcarbothioamide)benzamidineto-kN,k2S and Hdamp: 2-(N,N-dimethylaminomethyl)-phenyl-C1), and their affinities to possible biological targets were investigated. Three different tumor cell lines were used to perform the cytotoxicity assays, including one cisplatin-resistant model, and the results showed lower EC50 for 1 over 2 in every case: B16F10 (4.1 μM and 15.6 μM), A431 (4.0 μM and >50 μM) and OVCAR3 (4.2 μM and 24.5 μM). However, a lower toxicity to fibroblast 3T3 cell line was observed for 2 (30.58 μM) when compared to 1 (7.17 μM), resulting in comparable therapeutic indexes. Both complexes presented strong affinity to HSA: they distorted the secondary structure of the protein, as verified by circular dichroism, but 1 additionally presented the apparent fluorescence quenching constant (Kapp) ten times greater than 2, which was probably due to the fact of 1 being able to denature HSA. The ethidium bromide displacement assay showed that neither 1 nor 2 are strong DNA intercalators, which is in agreement with what was observed through the UV-vis titration. In both cases, the 260 nm band presented hyperchromism, which can indicate ionic interactions or DNA damage. In fact, 1 was able to damage the pGEM plasmid, similarly to cisplatin, as verified by agarose gel electrophoresis and Atomic Force Microscopy. Biophysical studies in cancer cells model membranes were also performed in order to investigate the interaction of the gold complexes to lipid bilayers and revealed that the compounds interact with the membranes by exhibiting partition coefficients of 103 order of magnitude. Overall, both complexes were found to be promising candidates for the development of a future anticancer drug against low sensitive or cisplatin resistant tumors.
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Affiliation(s)
- Bruna Possato
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
| | - Luciana Falcco Dalmolin
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
| | - Luiz Miguel Pereira
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
| | | | | | - Rogerio Valentim Gelamo
- Instituto de Ciências Tecnológicas e Exatas, Universidade Federal do Triângulo Mineiro, Uberaba, Brazil
| | - Ana Patrícia Yatsuda
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
| | | | - Sérgio de Albuquerque
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
| | - Natália Bueno Leite
- Núcleo de Desenvolvimento de Compostos Bioativos (NDCBio), Universidade Federal do Triângulo Mineiro, Uberaba, Brazil.
| | - Pedro Ivo da Silva Maia
- Núcleo de Desenvolvimento de Compostos Bioativos (NDCBio), Universidade Federal do Triângulo Mineiro, Uberaba, Brazil.
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Providello MV, Portapilla GB, Oliveira PAS, da Silva CBP, Anchieta NF, Tirapelli CR, de Albuquerque S. Melatonin decreases circulating Trypanosoma cruzi load with no effect on tissue parasite replication. Can J Physiol Pharmacol 2020; 99:795-802. [PMID: 33296274 DOI: 10.1139/cjpp-2020-0473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Cardiac damage during the acute phase of Chagas disease (CD) is associated with an increase in pro-inflammatory markers and oxidative stress. Melatonin (MEL) has emerged as a promising therapy for CD due to its antioxidant and immunomodulatory properties; however, the protective action of MEL in the cardiac tissue, as well as its direct action on the parasite cycle, is not fully understood. We investigated the effects of MEL on heart parasitism in mice infected with Trypanosoma cruzi and also its effects on the parasitic proliferation in vitro. Our in vivo study showed that MEL reduced circulating parasitemia load, but did not control tissue (heart, liver, and spleen) parasitism in mice. MEL did not prevent the redox imbalance in the left ventricle of infected mice. Our in vitro findings showed that MEL did not inhibit parasites replication within cells, but rather increased their release from cells. MEL did not control parasitism load in the heart or prevent the cardiac redox imbalance induced by acute T. cruzi infection. The hormone controlled the circulating parasitic load, but within cells MEL accelerated parasitic release, a response that can be harmful.
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Affiliation(s)
- Maiara Voltarelli Providello
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, DACTB, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo (USP), Ribeirão Preto, São Paulo, Brazil
| | - Gisele Bulhões Portapilla
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, DACTB, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo (USP), Ribeirão Preto, São Paulo, Brazil
| | - Pedro Alexandre Sampaio Oliveira
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, DACTB, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo (USP), Ribeirão Preto, São Paulo, Brazil
| | - Carla Brigagão Pacheco da Silva
- Laboratório de Farmacologia, DEPCH, Escola de Enfermagem de Ribeirão Preto, Universidade de São Paulo (USP), Ribeirão Preto, São Paulo, Brazil
| | - Naira Ferreira Anchieta
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, DACTB, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo (USP), Ribeirão Preto, São Paulo, Brazil
| | - Carlos Renato Tirapelli
- Laboratório de Farmacologia, DEPCH, Escola de Enfermagem de Ribeirão Preto, Universidade de São Paulo (USP), Ribeirão Preto, São Paulo, Brazil
| | - Sérgio de Albuquerque
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, DACTB, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo (USP), Ribeirão Preto, São Paulo, Brazil
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da Silva CFN, Chrispim PBH, Possato B, Portapilla GB, Rohrabaugh TN, Ramos LCB, Santana da Silva R, de Albuquerque S, Turro C, Nikolaou S. Anticancer and antitrypanosomal activities of trinuclear ruthenium compounds with orthometalated phenazine ligands. Dalton Trans 2020; 49:16440-16452. [PMID: 32776028 DOI: 10.1039/d0dt01035a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Trinuclear ruthenium complexes with orthometalated phenazines of general formula [Ru3(μ3-O)(μ2-OAc)5(L)(py)2]PF6 (L = dppn, benzo[i]dipyrido[3,2-a:2',3'-c]phenazine, 1; dppz, dipyrido[3,2-a:2',3'-c]phenazine, 2; CH3-dppz, 7-methyldipyrido[3,2-a:2',3'-c]phenazine, 3; Cl-dppz, 7-chlorodipyrido[3,2-a:2',3'-c]phenazine, 4) were investigated for their cytotoxic activity toward the B16F10 murine melanoma and the L929 non-cancer cell lines and against Trypanosoma cruzi (2-4). This study also reports a multi-technique investigation into how complexes 1-4 interact with DNA and human serum albumin, HSA. At concentrations ranging from 2 to 50 μM, all the complexes reduced B16F10 murine melanoma cell viability by over 50%. Complex 4 had the highest cytotoxic effect in the series, diminishing B16F10 cell viability to 38% at 2 μM, with an overall order for anticancer activity of 4 > 2 > 3 > 1. Complexes 2-4 showed remarkable activity in inhibiting epimastigote and amastigote forms of T. cruzi. Complex 2 showed better antitrypanosomal activity than the reference drug (IC50 = 1.19 μM and IC50 = 0.25 μM for epimastigote and amastigotes forms, respectivily). Ethidium bromide (EB) displacement assays showed that DNA intercalation progressively increases with the extension of the π-conjugation of the cyclometalating ligand and the presence of substituents in the phenazinic portion (1 > 4-3 > 2), showing that complex 1 is a stronger intercalator than EB itself (Kapp > 107 M-1). Viscosity measurements followed the same trend. Cytotoxicity against cancer cells and antitrypanosomal activity follow the same order, which is different to the tendency of DNA intercalation, suggesting DNA is not the main target of these complexes. Compound 1-4 showed very high affinity with HSA (Kb ∼109 M-1). Circular dichroism results also showed that the complexes alter significantly the secondary structure of the HSA, lowering the α-helix % from 86.2 (pure protein) to less than 5% for compounds 1, 2 and 4 at 2.8 μM. These findings demonstrated the important role of phenazines for the biological activity of triruthenium compounds.
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Affiliation(s)
- Camila Fontes Neves da Silva
- LABIQSC2 (Laboratório de Atividade Biológica e Química Supramolecular de Compostos de Coordenação), Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Av. Bandeirantes 3900, 14040-901, Ribeirão Preto, SP, Brazil.
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8
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Ribeiro JLS, Soares JCAV, Portapilla GB, Providello MV, Lima CHS, Muri EMF, de Albuquerque S, Dias LRS. Trypanocidal activity of new 1,6-diphenyl-1H-pyrazolo[3,4-b]pyridine derivatives: Synthesis, in vitro and in vivo studies. Bioorg Med Chem 2020; 29:115855. [PMID: 33199200 DOI: 10.1016/j.bmc.2020.115855] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 10/15/2020] [Accepted: 11/01/2020] [Indexed: 11/16/2022]
Abstract
Despite the serious public health problems caused by Chagas disease in several countries, the available therapy remains with only two drugs that are poorly active during the chronic phase of the disease in addition to having severe side effects. In search of new trypanocidal agents, herein we describe the synthesis and biological evaluation of eleven new 1,6-diphenyl-1H-pyrazolo[3,4-b]pyridine compounds containing the carbohydrazide or the 2,3-dihydro-1,3,4-oxadiazole moieties. Two of them showed promising in vitro activity against amastigote forms of T. cruzi and were evaluated in vivo in male BALB/c mice infected with T. cruzi Y strain. Our results suggest that the substitution at the C-2 position of the phenyl group connected to the carbohydrazide or to the 2,3-dihydro-1,3,4-oxadiazole moieties plays an important role in the trypanocidal activity of this class of compounds. Moreover, the compound containing the 2,3-dihydro-1,3,4-oxadiazole moiety has demonstrated more favorable structural requirements for in vivo activity than its carbohydrazide analog.
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Affiliation(s)
- Joana L S Ribeiro
- Universidade Federal Fluminense, Faculdade de Farmácia, Laboratório de Química Medicinal, RJ, Brazil
| | - Júlio C A V Soares
- Universidade Federal Fluminense, Faculdade de Farmácia, Laboratório de Química Medicinal, RJ, Brazil
| | - Gisele B Portapilla
- Universidade de São Paulo, Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, SP, Brazil
| | - Maiara V Providello
- Universidade de São Paulo, Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, SP, Brazil
| | - Camilo H S Lima
- Universidade Federal do Rio de Janeiro, Instituto de Química, RJ, Brazil
| | - Estela M F Muri
- Universidade Federal Fluminense, Faculdade de Farmácia, Laboratório de Química Medicinal, RJ, Brazil
| | - Sérgio de Albuquerque
- Universidade de São Paulo, Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, SP, Brazil.
| | - Luiza R S Dias
- Universidade Federal Fluminense, Faculdade de Farmácia, Laboratório de Química Medicinal, RJ, Brazil.
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9
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Quilles JC, Shamim A, Tezuka DY, Batista PHJ, Lopes CD, de Albuquerque S, Montanari CA, Leitão A. Dipeptidyl nitrile derivatives suppress the Trypanosoma cruzi in vitro infection. Exp Parasitol 2020; 219:108032. [PMID: 33137308 DOI: 10.1016/j.exppara.2020.108032] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2020] [Revised: 10/25/2020] [Accepted: 10/27/2020] [Indexed: 12/11/2022]
Abstract
Chagas disease affects several countries around the world with health and sanitation problems. Cysteine proteases are essential for the virulence and replication of the Trypanosoma cruzi, being modulated by dipeptidyl nitriles and derivatives. Here, four dipeptidyl nitrile derivatives were assayed in three T. cruzi morphologies and two strains (Tulahuen and Y) using a set of assays: (i) analysis of the inhibitory activity against cysteine proteases; (ii) determination of the cytotoxic activity and selectivity index; (iii) verification of the inhibition of the trypomastigote invasion in the host cell. These compounds could inhibit the activity of cysteine proteases using the selective substrate Z-FR-MCA for the trypomastigote lysate and extracellular amastigotes. Interestingly, these compounds did not present relevant enzymatic inhibition for the epimastigote lysate. Most of the substances were also cytotoxic and selective against the trypomastigotes and intracellular amastigotes. The best compound of the series (Neq0662) could reduce the enzymatic activity of the cysteine proteases for the trypomastigotes and amastigotes. It was equipotent to the benznidazole drug in the cytotoxic studies using these two parasite forms. Neq0662 was also selective for the parasite, and it inhibited the invasion of the mammalian host cell in all conditions tested at 10 μM. The stereochemistry of the trifluoromethyl group was an important factor for the bioactivity when the two diastereomers (Neq0662 and Neq0663) were compared. All-in-all, these results indicate that these compounds could move further in the drug development stage because of its promising bioactive profile.
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Affiliation(s)
- José C Quilles
- Medicinal & Biological Chemistry Group (NEQUIMED), São Carlos Institute of Chemistry (IQSC), University of São Paulo (USP), São Carlos, São Paulo, Brazil.
| | - Anwar Shamim
- Medicinal & Biological Chemistry Group (NEQUIMED), São Carlos Institute of Chemistry (IQSC), University of São Paulo (USP), São Carlos, São Paulo, Brazil.
| | - Daiane Y Tezuka
- Medicinal & Biological Chemistry Group (NEQUIMED), São Carlos Institute of Chemistry (IQSC), University of São Paulo (USP), São Carlos, São Paulo, Brazil; Programa de Pós-Graduação Interunidades em Bioengenharia - PPGIB-USP, Brazil.
| | - Pedro H J Batista
- Medicinal & Biological Chemistry Group (NEQUIMED), São Carlos Institute of Chemistry (IQSC), University of São Paulo (USP), São Carlos, São Paulo, Brazil.
| | - Carla D Lopes
- Medicinal & Biological Chemistry Group (NEQUIMED), São Carlos Institute of Chemistry (IQSC), University of São Paulo (USP), São Carlos, São Paulo, Brazil; Programa de Pós-Graduação Interunidades em Bioengenharia - PPGIB-USP, Brazil.
| | - Sérgio de Albuquerque
- Faculty of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, São Paulo, Brazil.
| | - Carlos A Montanari
- Medicinal & Biological Chemistry Group (NEQUIMED), São Carlos Institute of Chemistry (IQSC), University of São Paulo (USP), São Carlos, São Paulo, Brazil.
| | - Andrei Leitão
- Medicinal & Biological Chemistry Group (NEQUIMED), São Carlos Institute of Chemistry (IQSC), University of São Paulo (USP), São Carlos, São Paulo, Brazil.
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10
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de Albuquerque S, Cianni L, de Vita D, Duque C, Gomes ASM, Gomes P, Laughton C, Leitão A, Montanari CA, Montanari R, Ribeiro JFR, da Silva JS, Teixeira C. Molecular design aided by random forests and synthesis of potent trypanocidal agents as cruzain inhibitors for Chagas disease treatment. Chem Biol Drug Des 2020; 96:948-960. [PMID: 33058457 DOI: 10.1111/cbdd.13663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 12/13/2019] [Accepted: 12/23/2019] [Indexed: 11/30/2022]
Abstract
Cruzain is an established target for the identification of novel trypanocidal agents, but how good are in vitro/in vivo correlations? This work describes the development of a random forests model for the prediction of the bioavailability of cruzain inhibitors that are Trypanosoma cruzi killers. Some common properties that characterize drug-likeness are poorly represented in many established cruzain inhibitors. This correlates with the evidence that many high-affinity cruzain inhibitors are not trypanocidal agents against T. cruzi. On the other hand, T. cruzi killers that present typical drug-like characteristics are likely to show better trypanocidal action than those without such features. The random forests model was not outperformed by other machine learning methods (such as artificial neural networks and support vector machines), and it was validated with the synthesis of two new trypanocidal agents. Specifically, we report a new lead compound, Neq0565, which was tested on T. cruzi Tulahuen (β-galactosidase) with a pEC50 of 4.9. It is inactive in the host cell line showing a selectivity index (SI = EC50 cyto /EC50 T. cruzi ) higher than 50.
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Affiliation(s)
- Sérgio de Albuquerque
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, São Paulo, Brazil
| | - Lorenzo Cianni
- Grupo de Química Medicinal, Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos/SP, Brazil
| | - Daniela de Vita
- Grupo de Química Medicinal, Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos/SP, Brazil
| | - Carla Duque
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, São Paulo, Brazil
| | - Ana S M Gomes
- LAQV-REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Porto, Portugal
| | - Paula Gomes
- LAQV-REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Porto, Portugal
| | - Charles Laughton
- School of Pharmacy and Centre for Biomolecular Sciences, University of Nottingham, Nottingham, UK
| | - Andrei Leitão
- Grupo de Química Medicinal, Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos/SP, Brazil
| | - Carlos A Montanari
- Grupo de Química Medicinal, Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos/SP, Brazil
| | - Raphael Montanari
- Centro de Robótica de São Carlos, EESC-ICMC, Universidade de São Paulo, São Paulo, Brazil
| | - Jean F R Ribeiro
- Grupo de Química Medicinal, Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos/SP, Brazil
| | - João Santana da Silva
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, São Paulo, Brazil
| | - Cátia Teixeira
- LAQV-REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Porto, Portugal
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11
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Sousa LM, Souza WA, Paixão DA, Fazzi RB, Tezuka DY, Lopes CD, Carneiro ZA, Moreira MB, Pivatto M, Netto AV, de Albuquerque S, Ferreira FB, De Oliveira RJ, Resende JA, Lino RC, De Oliveira Júnior RJ, Da Costa Ferreira AM, Guerra W. DNA binding, cleavage, apoptosis and cytotoxicity studies of three heteroleptic nickel complexes bearing β-diketones. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119824] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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12
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Bonatto V, Batista PHJ, Cianni L, De Vita D, Silva DG, Cedron R, Tezuka DY, de Albuquerque S, Moraes CB, Franco CH, Lameira J, Leitão A, Montanari CA. On the intrinsic reactivity of highly potent trypanocidal cruzain inhibitors. RSC Med Chem 2020; 11:1275-1284. [PMID: 34095840 DOI: 10.1039/d0md00097c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2020] [Accepted: 08/03/2020] [Indexed: 11/21/2022] Open
Abstract
The cysteine protease cruzipain is considered to be a validated target for therapeutic intervention in the treatment of Chagas disease. Hence, peptidomimetic cruzipain inhibitors having a reactive group (known as warhead) are subject to continuous studies to discover novel antichagasic compounds. Here, we evaluated how different warheads for a set of structurally similar related compounds could inhibit the activity of cruzipain and, ultimately, their trypanocidal effect. We first investigated in silico the intrinsic reactivity of these compounds by applying the Fukui index to correlate it with the enzymatic affinity. Then, we evaluated their potency against T. cruzi (Y and Tulahuen strains), which revealed the reversible cruzain inhibitor Neq0656 as a better trypanocidal agent (ECY.strain 50 = 0.1 μM; SI = 58.4) than the current drug benznidazole (ECY.strain 50 = 5.1 μM; SI > 19.6). We also measured the half-life time by HPLC analysis of three lead compounds in the presence of glutathione and cysteine to experimentally assess their intrinsic reactivity. Results clearly illustrated the reactivity trend for the warheads (azanitrile > aldehyde > nitrile), where the aldehyde displayed an intermediate intrinsic reactivity. Therefore, the aldehyde bearing peptidomimetic compounds should be subject for in-depth evaluation in the drug discovery process.
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Affiliation(s)
- Vinicius Bonatto
- Medicinal Chemistry Group, Institute of Chemistry of São Carlos, University of São Paulo Avenue Trabalhador Sancarlense, 400 23566-590 São Carlos/SP Brazil
| | - Pedro Henrique Jatai Batista
- Medicinal Chemistry Group, Institute of Chemistry of São Carlos, University of São Paulo Avenue Trabalhador Sancarlense, 400 23566-590 São Carlos/SP Brazil
| | - Lorenzo Cianni
- Medicinal Chemistry Group, Institute of Chemistry of São Carlos, University of São Paulo Avenue Trabalhador Sancarlense, 400 23566-590 São Carlos/SP Brazil
| | - Daniela De Vita
- Medicinal Chemistry Group, Institute of Chemistry of São Carlos, University of São Paulo Avenue Trabalhador Sancarlense, 400 23566-590 São Carlos/SP Brazil
| | - Daniel G Silva
- Medicinal Chemistry Group, Institute of Chemistry of São Carlos, University of São Paulo Avenue Trabalhador Sancarlense, 400 23566-590 São Carlos/SP Brazil
| | - Rodrigo Cedron
- Medicinal Chemistry Group, Institute of Chemistry of São Carlos, University of São Paulo Avenue Trabalhador Sancarlense, 400 23566-590 São Carlos/SP Brazil
| | - Daiane Y Tezuka
- Medicinal Chemistry Group, Institute of Chemistry of São Carlos, University of São Paulo Avenue Trabalhador Sancarlense, 400 23566-590 São Carlos/SP Brazil .,Ribeirão Preto School of Pharmaceutical Sciences, University of São Paulo Ribeirão Preto São Paulo Brazil
| | - Sérgio de Albuquerque
- Ribeirão Preto School of Pharmaceutical Sciences, University of São Paulo Ribeirão Preto São Paulo Brazil
| | - Carolina Borsoi Moraes
- Laboratório Nacional de Biociências (LNBio), Centro Nacional de Pesquisa em Energia e Materiais (CNPEM) Campinas São Paulo Brazil
| | - Caio Haddad Franco
- Laboratório Nacional de Biociências (LNBio), Centro Nacional de Pesquisa em Energia e Materiais (CNPEM) Campinas São Paulo Brazil
| | - Jerônimo Lameira
- Medicinal Chemistry Group, Institute of Chemistry of São Carlos, University of São Paulo Avenue Trabalhador Sancarlense, 400 23566-590 São Carlos/SP Brazil .,Laboratório de Planejamento e Desenvolvimento de Fármacos, Instituto de Ciências Exatas e Naturais, Universidade Federal do Pará Rua Augusto Corrêa 01 CP 66075-110 Belém-PA Brazil
| | - Andrei Leitão
- Medicinal Chemistry Group, Institute of Chemistry of São Carlos, University of São Paulo Avenue Trabalhador Sancarlense, 400 23566-590 São Carlos/SP Brazil
| | - Carlos A Montanari
- Medicinal Chemistry Group, Institute of Chemistry of São Carlos, University of São Paulo Avenue Trabalhador Sancarlense, 400 23566-590 São Carlos/SP Brazil
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13
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da Silva Lima CH, de Araujo Vanelis Soares JC, de Sousa Ribeiro JL, Muri EMF, de Albuquerque S, Dias LRS. Anti-Trypanosoma cruzi Activity and Molecular Docking Studies of 1Hpyrazolo[ 3, 4-b]pyridine Derivatives. LETT DRUG DES DISCOV 2020. [DOI: 10.2174/1570180816666190305141733] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
Untargeted studies led to the development of some pyrazolopyridine
derivatives for the antiparasitic profile, particularly the derivatives containing the structural
carbohydrazide subunit. In this work, we proceeded in the biological screening of 27 N’- (substitutedphenylmethylene)-
4-carbohydrazide-3-methyl-1-phenyl-1H-pyrazolo[3, 4-b]pyridine derivatives against
T. cruzi as well as the cytotoxic evaluation. To obtain more information about the trypanocidal
activity of this class of compounds, we carried out molecular docking simulations to get an insight
into putative targets in T. cruzi.
Methods:
The assays were evaluated against both trypomastigote and amastigote forms of T. cruzi
and cytotoxicity assays on LLCMK2 cells. The predominant conformational compounds were
analyzed and molecular docking simulations performed.
Results:
The results from trypanocidal activity screening of this series showed that just the
compounds with phenyl group at C-6 position exhibited activity and the N’-4-hydroxyphenylmethylene
derivative presented the best profile against both trypomastigote and amastigote
forms of T. cruzi. Docking simulation results showed that this compound has a binding affinity with
both CYP51 and cruzain targets of T. cruzi.
Conclusion:
Our results indicate that the hydroxyl substituent at the N’-substituted-phenylmethylene
moiety and the phenyl ring at C-6 of 1H-pyrazolo[3,4-b]pyridine system are relevant for the
trypanocidal activity of this class of compounds. Also, docking simulations showed that activity
presented can be related to more than one target of the parasite.
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Affiliation(s)
- Camilo Henrique da Silva Lima
- Laboratório de Quimica Medicinal, Universidade Federal Fluminense, Faculdade de Farmacia, Niteroi, Rio de Janeiro, Brazil
| | | | - Joana Lucius de Sousa Ribeiro
- Laboratório de Quimica Medicinal, Universidade Federal Fluminense, Faculdade de Farmacia, Niteroi, Rio de Janeiro, Brazil
| | - Estela Maris Freitas Muri
- Laboratório de Quimica Medicinal, Universidade Federal Fluminense, Faculdade de Farmacia, Niteroi, Rio de Janeiro, Brazil
| | - Sérgio de Albuquerque
- Universidade de Sao Paulo, Departamento de Analises Clinicas, Toxicologicas e Bromatologicas, Av. do Cafe s/n, Ribeirao Preto, SP, 14040-903, Brazil
| | - Luiza Rosaria Sousa Dias
- Laboratório de Quimica Medicinal, Universidade Federal Fluminense, Faculdade de Farmacia, Niteroi, Rio de Janeiro, Brazil
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14
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Paixão DA, de Oliveira BC, Almeida JDC, Sousa LM, Lopes CD, Carneiro ZA, Tezuka DY, Clavijo JCT, Ellena J, Polloni L, Machado PH, de Albuquerque S, de Oliveira Júnior RJ, Guilardi S, Guerra W. Crystal structure, anti-Trypanosoma cruzi and cytotoxic activities of Cu(II) complexes bearing β-diketone and α-diimine ligands. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2019.119164] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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15
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Lopes CD, Possato B, Gaspari APS, Oliveira RJ, Abram U, Almeida JPA, Rocho FDR, Leitão A, Montanari CA, Maia PIS, da Silva JS, de Albuquerque S, Carneiro ZA. Organometallic Gold(III) Complex [Au(Hdamp)(L1 4)] + (L1 = SNS-Donating Thiosemicarbazone) as a Candidate to New Formulations against Chagas Disease. ACS Infect Dis 2019; 5:1698-1707. [PMID: 31419384 DOI: 10.1021/acsinfecdis.8b00284] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Chagas disease remains a serious public health concern with unsatisfactory treatment outcomes due to strain-specific drug resistance and various side effects. To identify new therapeutic drugs against Trypanosoma cruzi, we evaluated both the in vitro and in vivo activity of the organometallic gold(III) complex [Au(III)(Hdamp)(L14)]Cl (L1 = SNS-donating thiosemicarbazone), henceforth denoted 4-Cl. Our results demonstrated that 4-Cl was more effective than benznidazole (Bz) in eliminating both the extracellular trypomastigote and intracellular amastigote forms of the parasite without cytotoxic effects on mammalian cells. In in vivo assays, 4-Cl in PBS solution loses the protonation and becomes the 4-neutral. 4-Neutral reduced parasitaemia and tissue parasitism in addition to protecting the liver and heart from tissue damage at 2.8 mg/kg/day. All these changes resulted in the survival of 100% of the mice treated with the gold complex during the acute phase. Analyzing the surviving animals of the acute infection, the parasite load after 150 days of infection was equivalent to those treated with the standard dose of Bz without demonstrating the hepatotoxicity of the latter. In addition, we identified a modulation of interferon gamma (IFN-γ) levels that may be targeting the disease's positive outcome. To the best of our knowledge, this is the first gold organometallic study that shows promise in an in vivo experimental model against Chagas disease.
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Affiliation(s)
- Carla Duque Lopes
- Department of Clinical Toxicological and Bromatological Analysis School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, São Paulo 14040-903, Brazil
- Departament of Biochemistry and Immunology, School of Medicine, University of São Paulo, Ribeirão Preto, São Paulo 14049-900, Brazil
| | - Bruna Possato
- Department of Clinical Toxicological and Bromatological Analysis School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, São Paulo 14040-903, Brazil
| | - Ana Paula S. Gaspari
- Department of Clinical Toxicological and Bromatological Analysis School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, São Paulo 14040-903, Brazil
| | - Ronaldo J. Oliveira
- Núcleo de Desenvolvimento de Compostos Bioativos (NDCBio), Universidade Federal do Triângulo Mineiro, Uberaba, Minas Gerais 38025-470, Brazil
| | - Ulrich Abram
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Berlin D-14195, Germany
| | - José P. A. Almeida
- Department of Clinical Toxicological and Bromatological Analysis School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, São Paulo 14040-903, Brazil
| | - Fernanda dos Reis Rocho
- Grupo de Estudos em Química Medicinal de Produtos Naturais−NEQUIMED-PN, Instituto de Química de São Carlos, Universidade de São Paulo, Av. Trabalhador Sancarlense 400, P.O. Box 780, São Carlos, São Paulo 13560-960, Brazil
| | - Andrei Leitão
- Grupo de Estudos em Química Medicinal de Produtos Naturais−NEQUIMED-PN, Instituto de Química de São Carlos, Universidade de São Paulo, Av. Trabalhador Sancarlense 400, P.O. Box 780, São Carlos, São Paulo 13560-960, Brazil
| | - Carlos A. Montanari
- Grupo de Estudos em Química Medicinal de Produtos Naturais−NEQUIMED-PN, Instituto de Química de São Carlos, Universidade de São Paulo, Av. Trabalhador Sancarlense 400, P.O. Box 780, São Carlos, São Paulo 13560-960, Brazil
| | - Pedro I. S. Maia
- Núcleo de Desenvolvimento de Compostos Bioativos (NDCBio), Universidade Federal do Triângulo Mineiro, Uberaba, Minas Gerais 38025-470, Brazil
| | - João S. da Silva
- Departament of Biochemistry and Immunology, School of Medicine, University of São Paulo, Ribeirão Preto, São Paulo 14049-900, Brazil
| | - Sérgio de Albuquerque
- Department of Clinical Toxicological and Bromatological Analysis School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, São Paulo 14040-903, Brazil
| | - Zumira A. Carneiro
- Department of Clinical Toxicological and Bromatological Analysis School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, São Paulo 14040-903, Brazil
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16
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Salsi F, Bulhões Portapilla G, Schutjajew K, Roca Jungfer M, Goulart A, Hagenbach A, de Albuquerque S, Abram U. Organometallic Gold(III) Complexes with Tridentate Halogen‐Substituted Thiosemicarbazones: Effects of Halogenation on Cytotoxicity and Anti‐Parasitic Activity. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900904] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Federico Salsi
- Institute of Chemistry and Biochemistry Freie Universität Berlin Fabeckstr. 34–36 D‐14195 Berlin Germany
| | - Gisele Bulhões Portapilla
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto Universidade de São Paulo Av. do Café – Vila Monte Alegre 14040‐903 Ribeirão Preto Brazil
| | - Konstantin Schutjajew
- Institute of Chemistry and Biochemistry Freie Universität Berlin Fabeckstr. 34–36 D‐14195 Berlin Germany
| | - Maximilian Roca Jungfer
- Institute of Chemistry and Biochemistry Freie Universität Berlin Fabeckstr. 34–36 D‐14195 Berlin Germany
| | - Amanda Goulart
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto Universidade de São Paulo Av. do Café – Vila Monte Alegre 14040‐903 Ribeirão Preto Brazil
| | - Adelheid Hagenbach
- Institute of Chemistry and Biochemistry Freie Universität Berlin Fabeckstr. 34–36 D‐14195 Berlin Germany
| | - Sérgio de Albuquerque
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto Universidade de São Paulo Av. do Café – Vila Monte Alegre 14040‐903 Ribeirão Preto Brazil
| | - Ulrich Abram
- Institute of Chemistry and Biochemistry Freie Universität Berlin Fabeckstr. 34–36 D‐14195 Berlin Germany
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17
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Salsi F, Bulhões Portapilla G, Simon S, Roca Jungfer M, Hagenbach A, de Albuquerque S, Abram U. Effect of Fluorination on the Structure and Anti-Trypanosoma cruzy Activity of Oxorhenium(V) Complexes with S,N,S-Tridentate Thiosemicarbazones and Benzoylthioureas. Synthesis and Structures of Technetium(V) Analogues. Inorg Chem 2019; 58:10129-10138. [DOI: 10.1021/acs.inorgchem.9b01260] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Federico Salsi
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Fabeckstrasse 34-36, D-14195 Berlin, Germany
| | - Gisele Bulhões Portapilla
- Faculdade de Ciencias Farmaceuticas de Ribeirão Preto, Universidade de São Paulo, Av. do Cafe - Vila Monte Alegre, Ribeirão Preto, São Paulo 14040-903, Brazil
| | - Saskia Simon
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Fabeckstrasse 34-36, D-14195 Berlin, Germany
| | - Maximilian Roca Jungfer
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Fabeckstrasse 34-36, D-14195 Berlin, Germany
| | - Adelheid Hagenbach
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Fabeckstrasse 34-36, D-14195 Berlin, Germany
| | - Sérgio de Albuquerque
- Faculdade de Ciencias Farmaceuticas de Ribeirão Preto, Universidade de São Paulo, Av. do Cafe - Vila Monte Alegre, Ribeirão Preto, São Paulo 14040-903, Brazil
| | - Ulrich Abram
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Fabeckstrasse 34-36, D-14195 Berlin, Germany
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Quilles JC, Tezuka DY, Lopes CD, Ribeiro FL, Laughton CA, de Albuquerque S, Montanari CA, Leitão A. Dipeptidyl nitrile derivatives have cytostatic effects against Leishmania spp. promastigotes. Exp Parasitol 2019; 200:84-91. [PMID: 30954455 DOI: 10.1016/j.exppara.2019.04.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2018] [Revised: 02/14/2019] [Accepted: 04/01/2019] [Indexed: 12/28/2022]
Abstract
Cysteine proteases are involved in critical cell processes to the protozoa from Leishmania genus, and their inhibition is a therapeutic alternative to treat the disease. In this work, derivatives of dipeptidyl nitriles acting as reversible covalent inhibitors of cysteine proteases were studied as cytostatic agents. The proteolytic activity inside the living and lysed parasite cells was quantified using a selective substrate for cysteine proteases (Z-FR-MCA) from Leishmania amazonensis and L. infantum. The overall proteolytic activity of intact cells and even cell extracts was only marginally affected at high concentrations, with the observation of cytostatic activity and cell cycle arrest of promastigotes. However, the cytotoxic effects were only observed for infected J774 macrophages, which impaired further analysis of the amastigote infection. Therefore, the proteolytic inhibition in intact L. amazonensis and L. infantum promastigotes had no relationship to the cytostatic activity, which emphasizes that these dipeptidyl nitriles act through another mechanism of action.
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Affiliation(s)
- José C Quilles
- Medicinal Chemistry Group (NEQUIMED), São Carlos Institute of Chemistry (IQSC), University of São Paulo (USP), Av. Trabalhador São-carlense, 400, São Carlos, SP, 13.566-590, Brazil.
| | - Daiane Y Tezuka
- Medicinal Chemistry Group (NEQUIMED), São Carlos Institute of Chemistry (IQSC), University of São Paulo (USP), Av. Trabalhador São-carlense, 400, São Carlos, SP, 13.566-590, Brazil; Programa de Pós-graduação em Bioengenharia, University of São Paulo (USP), Av. Trabalhador São-carlense, 400, São Carlos, SP, Brazil.
| | - Carla D Lopes
- Medicinal Chemistry Group (NEQUIMED), São Carlos Institute of Chemistry (IQSC), University of São Paulo (USP), Av. Trabalhador São-carlense, 400, São Carlos, SP, 13.566-590, Brazil; Programa de Pós-graduação em Bioengenharia, University of São Paulo (USP), Av. Trabalhador São-carlense, 400, São Carlos, SP, Brazil.
| | - Fernanda L Ribeiro
- Medicinal Chemistry Group (NEQUIMED), São Carlos Institute of Chemistry (IQSC), University of São Paulo (USP), Av. Trabalhador São-carlense, 400, São Carlos, SP, 13.566-590, Brazil.
| | - Charles A Laughton
- School of Pharmacy and Centre for Biomolecular Sciences, University of Nottingham, Nottingham, NG7 2RD, UK.
| | - Sérgio de Albuquerque
- Laboratório de Parasitologia, Falculdade de Ciências Farmacêuticas de Ribeirão Preto (FCFRP-USP), Ribeirão Preto, SP, Brazil.
| | - Carlos A Montanari
- Medicinal Chemistry Group (NEQUIMED), São Carlos Institute of Chemistry (IQSC), University of São Paulo (USP), Av. Trabalhador São-carlense, 400, São Carlos, SP, 13.566-590, Brazil.
| | - Andrei Leitão
- Medicinal Chemistry Group (NEQUIMED), São Carlos Institute of Chemistry (IQSC), University of São Paulo (USP), Av. Trabalhador São-carlense, 400, São Carlos, SP, 13.566-590, Brazil.
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Trefzger OS, das Neves AR, Barbosa NV, Carvalho DB, Pereira IC, Perdomo RT, Matos MFC, Yoshida NC, Kato MJ, de Albuquerque S, Arruda CCP, Baroni ACM. Design, synthesis and antitrypanosomatid activities of 3,5-diaryl-isoxazole analogues based on neolignans veraguensin, grandisin and machilin G. Chem Biol Drug Des 2018; 93:313-324. [DOI: 10.1111/cbdd.13417] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 09/26/2018] [Accepted: 09/30/2018] [Indexed: 12/25/2022]
Affiliation(s)
- Ozildéia S. Trefzger
- LASQUIM - Laboratório de Síntese e Química Medicinal; FACFAN - Faculdade de Ciências Farmacêuticas, Alimentos e Nutrição; Universidade Federal do Mato Grosso do Sul; UFMS; Campo Grande MS Brazil
| | - Amarith R. das Neves
- LASQUIM - Laboratório de Síntese e Química Medicinal; FACFAN - Faculdade de Ciências Farmacêuticas, Alimentos e Nutrição; Universidade Federal do Mato Grosso do Sul; UFMS; Campo Grande MS Brazil
- Laboratorio de Parasitologia Humana; INBIO - Instituto de Biologia; Universidade Federal do Mato Grosso do Sul; Campo Grande MS Brazil
| | - Natália V. Barbosa
- LASQUIM - Laboratório de Síntese e Química Medicinal; FACFAN - Faculdade de Ciências Farmacêuticas, Alimentos e Nutrição; Universidade Federal do Mato Grosso do Sul; UFMS; Campo Grande MS Brazil
- Laboratorio de Parasitologia Humana; INBIO - Instituto de Biologia; Universidade Federal do Mato Grosso do Sul; Campo Grande MS Brazil
| | - Diego B. Carvalho
- LASQUIM - Laboratório de Síntese e Química Medicinal; FACFAN - Faculdade de Ciências Farmacêuticas, Alimentos e Nutrição; Universidade Federal do Mato Grosso do Sul; UFMS; Campo Grande MS Brazil
| | - Indiara C. Pereira
- Laboratorio de Biologia Molecular e Cultura de Celulas; FACFAN - Faculdade de Ciências Farmacêuticas; Alimentos e Nutricao; Universidade Federal do Mato Grosso do Sul; UFMS; Campo Grande MS Brazil
| | - Renata T. Perdomo
- Laboratorio de Biologia Molecular e Cultura de Celulas; FACFAN - Faculdade de Ciências Farmacêuticas; Alimentos e Nutricao; Universidade Federal do Mato Grosso do Sul; UFMS; Campo Grande MS Brazil
| | - Maria F. C. Matos
- Laboratorio de Biologia Molecular e Cultura de Celulas; FACFAN - Faculdade de Ciências Farmacêuticas; Alimentos e Nutricao; Universidade Federal do Mato Grosso do Sul; UFMS; Campo Grande MS Brazil
| | - Nidia C. Yoshida
- Instituto de Química; Universidade Federal do Mato Grosso do Sul, UFMS; Campo Grande MS Brazil
| | - Massuo J. Kato
- Institute of Chemistry; University of São Paulo; São Paulo SP Brazil
| | - Sérgio de Albuquerque
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas; Faculdade de Ciências Farmacêuticas de Ribeirão Preto; USP; Ribeirão Preto SP Brazil
| | - Carla C. P. Arruda
- Laboratorio de Parasitologia Humana; INBIO - Instituto de Biologia; Universidade Federal do Mato Grosso do Sul; Campo Grande MS Brazil
| | - Adriano C. M. Baroni
- LASQUIM - Laboratório de Síntese e Química Medicinal; FACFAN - Faculdade de Ciências Farmacêuticas, Alimentos e Nutrição; Universidade Federal do Mato Grosso do Sul; UFMS; Campo Grande MS Brazil
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20
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Paixão DA, Lopes CD, Carneiro ZA, Sousa LM, de Oliveira LP, Lopes NP, Pivatto M, Chaves JDS, de Almeida MV, Ellena J, Moreira MB, Netto AVG, de Oliveira RJ, Guilardi S, de Albuquerque S, Guerra W. In vitro anti-Trypanosoma cruzi activity of ternary copper(II) complexes and in vivo evaluation of the most promising complex. Biomed Pharmacother 2018; 109:157-166. [PMID: 30396072 DOI: 10.1016/j.biopha.2018.10.057] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 10/11/2018] [Accepted: 10/11/2018] [Indexed: 12/12/2022] Open
Abstract
In order to improve the previously observed antichagasic activity of Cu(II) complexes containing 2-chlorobenzhydrazide (2-CH), we report herein the synthesis and anti-Trypanosoma cruzi activity of novel copper complexes containing 2-methoxybenzhydrazide (2-MH), 4-methoxybenzhydrazide (4-MH) and three α-diimine ligands, namely, 1,10-phenanthroline (phen), 2,2-bipyridine (bipy) and 4-4'-dimethoxy-2-2'-bipyridine (dmb). Two of these complexes showed higher in vitro anti-Trypanosoma cruzi activity when compared to benznidazole, the main drug used in Chagas disease treatment. One of them, the copper complex with 4-MH and dmb, [Cu(4-MH)(dmb)(ClO4)2], exhibited a higher selectivity index than that recommended for preclinical studies. Considering this observation, complex [Cu(4-MH)(dmb)(ClO4)2] was selected for preliminary in vivo assays, which verified that this compound was able to reduce parasitemia by 64% at the peak of infection. Further investigations were performed on all compounds. The Cu(II) complexes bind to ct-DNA with Kb values in the range of 103-104 M-1, with [Cu(4-MH)(dmb)(ClO4)2] showing the highest Kb value (1.45 × 104 M-1). Molecular docking simulations predicted that [Cu(4-MH)(dmb)(ClO4)2] binds in the minor groove of the double helix of ct-DNA and forms one hydrogen bond.
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Affiliation(s)
- Drielly A Paixão
- Instituto de Química, Universidade Federal de Uberlândia, Campus Santa Mônica, Uberlândia, MG, Brazil
| | - Carla D Lopes
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Zumira A Carneiro
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Luana M Sousa
- Instituto de Química, Universidade Federal de Uberlândia, Campus Santa Mônica, Uberlândia, MG, Brazil
| | - Leticia P de Oliveira
- Instituto de Química, Universidade Federal de Uberlândia, Campus Santa Mônica, Uberlândia, MG, Brazil
| | - Norberto P Lopes
- Núcleo de Pesquisa em Produtos Naturais e Sintéticos (NPPNS), Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Marcos Pivatto
- Instituto de Química, Universidade Federal de Uberlândia, Campus Santa Mônica, Uberlândia, MG, Brazil
| | - Joana Darc S Chaves
- Departamento de Química, Universidade Federal de Juiz de Fora, Juiz de Fora-MG, Brazil
| | - Mauro V de Almeida
- Departamento de Química, Universidade Federal de Juiz de Fora, Juiz de Fora-MG, Brazil
| | - Javier Ellena
- Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos, SP, Brazil
| | - Mariete B Moreira
- UNESP - Universidade Estadual Paulista, Instituto de Química, 14800-060, Araraquara-SP, Brazil
| | - Adelino V G Netto
- UNESP - Universidade Estadual Paulista, Instituto de Química, 14800-060, Araraquara-SP, Brazil
| | - Ronaldo J de Oliveira
- Departamento de Física, Instituto de Ciências Exatas, Naturais e Educação, Universidade Federal do Triângulo Mineiro, Uberaba, MG, Brazil
| | - Silvana Guilardi
- Instituto de Química, Universidade Federal de Uberlândia, Campus Santa Mônica, Uberlândia, MG, Brazil
| | - Sérgio de Albuquerque
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Wendell Guerra
- Instituto de Química, Universidade Federal de Uberlândia, Campus Santa Mônica, Uberlândia, MG, Brazil.
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21
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Paixão DA, de Oliveira LP, da S. Maia PI, Deflon VM, Carneiro ZA, de Almeida KJ, Lopes NP, Pivatto M, Chaves JDS, de Albuquerque S, de Almeida MV, Guilardi S, Guerra W. Crystal structure of two new polymeric copper(II) complexes active against Trypanosoma cruzi. Journal of Saudi Chemical Society 2018. [DOI: 10.1016/j.jscs.2018.01.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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22
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Salsi F, Bulhões Portapilla G, Schutjajew K, Carneiro ZA, Hagenbach A, de Albuquerque S, da Silva Maia PI, Abram U. Thiosemicarbazones and thiadiazines derived from fluorinated benzoylthioureas: Synthesis, crystal structure and anti-Trypanosoma cruzi activity. J Fluor Chem 2018. [DOI: 10.1016/j.jfluchem.2018.08.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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23
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Vaidergorn MM, Carneiro ZA, Lopes CD, de Albuquerque S, Reis FCC, Nikolaou S, Mello JFRE, Genesi GL, Trossini GHG, Ganesan A, Emery FS. β-amino alcohols and their respective 2-phenyl-N-alkyl aziridines as potential DNA minor groove binders. Eur J Med Chem 2018; 157:657-664. [PMID: 30125724 DOI: 10.1016/j.ejmech.2018.07.055] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Revised: 07/17/2018] [Accepted: 07/23/2018] [Indexed: 02/07/2023]
Abstract
It is known that aziridines and nitrogen mustards exert their biological activities, especially in chemotherapy, via DNA alkylation. The studied scaffold, 2-phenyl-1-aziridine, provides a distinct conformation compared to commonly used aziridines, and therefore, leads to a change in high-strained ring reactivity towards biological nucleophiles, such as DNA. The above series of compounds was tested in three breast cell lines: MCF-10, a healthy cell; MCF-7, a hormone responsive cancer cell; and MDA-MB-231, a triple negative breast cancer cell. Both aziridines and their precursors, β-amino alcohols, showed activity towards these cells, and some of the compounds showed higher selectivity index than cisplatin, the drug used as control. When the type of cell death was investigated, the synthesized compounds demonstrated higher apoptosis and lower necrosis rates than cisplatin, and when the mechanism of action was studied, the compounds were shown to interact with DNA via its minor groove instead of alkylation or intercalation.
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Affiliation(s)
- Miguel M Vaidergorn
- Departament of Pharmaceutical Sciences, School of Pharmaceutical Sciences of Ribeirão Preto - FCFRP-USP, University of São Paulo, Avenida do Café S/n, Ribeirão Preto, SP, 14040-903, Brazil
| | - Zumira A Carneiro
- Department of Clinical Analyses, Toxicology and Food Science, School of Pharmaceutical Sciences of Ribeirão Preto - FCFRP-USP, University of São Paulo, Brazil
| | - Carla D Lopes
- Department of Clinical Analyses, Toxicology and Food Science, School of Pharmaceutical Sciences of Ribeirão Preto - FCFRP-USP, University of São Paulo, Brazil
| | - Sérgio de Albuquerque
- Department of Clinical Analyses, Toxicology and Food Science, School of Pharmaceutical Sciences of Ribeirão Preto - FCFRP-USP, University of São Paulo, Brazil
| | - Felipe C C Reis
- Departament of Chemistry, Faculty of Philosophy, Sciences and Letters at Ribeirão Preto - FFCLRP-USP, Brazil
| | - Sofia Nikolaou
- Departament of Chemistry, Faculty of Philosophy, Sciences and Letters at Ribeirão Preto - FFCLRP-USP, Brazil
| | - Juliana F R E Mello
- LITEC, Departament of Pharmacy, School of Pharmaceutical Sciences - University of São Paulo, Avenida Prof. Lineu Prestes, 580, Bloco 13 Superior, São Paulo, SP, 05508-000, Brazil
| | - Giovani L Genesi
- LITEC, Departament of Pharmacy, School of Pharmaceutical Sciences - University of São Paulo, Avenida Prof. Lineu Prestes, 580, Bloco 13 Superior, São Paulo, SP, 05508-000, Brazil
| | - Gustavo H G Trossini
- LITEC, Departament of Pharmacy, School of Pharmaceutical Sciences - University of São Paulo, Avenida Prof. Lineu Prestes, 580, Bloco 13 Superior, São Paulo, SP, 05508-000, Brazil
| | - A Ganesan
- School of Pharmacy, University of East Anglia, Norwich, UK
| | - Flavio S Emery
- Departament of Pharmaceutical Sciences, School of Pharmaceutical Sciences of Ribeirão Preto - FCFRP-USP, University of São Paulo, Avenida do Café S/n, Ribeirão Preto, SP, 14040-903, Brazil.
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24
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de Oliveira LP, Carneiro ZA, Ribeiro CM, Lima MF, Paixão DA, Pivatto M, de Souza MVN, Teixeira LR, Lopes CD, de Albuquerque S, Pavan FR, Guerra W. Three new platinum complexes containing fluoroquinolones and DMSO: Cytotoxicity and evaluation against drug-resistant tuberculosis. J Inorg Biochem 2018; 183:77-83. [PMID: 29567518 DOI: 10.1016/j.jinorgbio.2018.03.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 03/05/2018] [Accepted: 03/14/2018] [Indexed: 11/26/2022]
Abstract
This work describes the synthesis, characterization and biological evaluation of three platinum complexes of the type [Pt(DMSO)(L)Cl]Cl, in which L represents a fluoroquinolone, namely, ciprofloxacin (cpl), ofloxacin (ofl), or sparfloxacin (spf). The new complexes were characterized by elemental analysis, high-resolution mass spectrometry (HRESIMS) and 1H, 13C and 195Pt NMR (nuclear magnetic resonance). The spectral data suggest that the fluoroquinolones act as bidentate ligands coordinated to Pt(II) through the nitrogen atoms of the piperazine ring. Microbiological assays against wild type Mycobacterium tuberculosis (ATCC 27294) showed that all complexes have been very potent, exhibiting antitubercular potency at concentrations <2 μM, although none of the complexes presented higher potency than established anti-TB drugs. As to the resistant strains, the complex with sparfloxacin, [Pt(DMSO)(spf)Cl]Cl exhibited the best potential against most Mycobacterium tuberculosis clinical isolates. The cytotoxicity of these compounds was also evaluated in three breast cell lines: MCF-10 (a healthy cell), MCF-7 (a hormone responsive cancer cell) and MDA-MB-231 (triple negative breast cancer cell). In both tumor cell lines, [Pt(DMSO)(spf)Cl]Cl was more active and more selective than cisplatin. Flow cytometry analysis revealed that [Pt(DMSO)(spf)Cl]Cl induced late apoptotic cell death in MDA-MB-231 cells.
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Affiliation(s)
- Leticia P de Oliveira
- Instituto de Química, Universidade Federal de Uberlândia, Campus Santa Mônica, Uberlândia, MG, Brazil
| | - Zumira A Carneiro
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Camila M Ribeiro
- Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista, Laboratório de Pesquisa em Tuberculose, Campus Araraquara, Araraquara, SP, Brazil
| | - Maurício F Lima
- Instituto de Química, Universidade Federal de Uberlândia, Campus Santa Mônica, Uberlândia, MG, Brazil
| | - Drielly A Paixão
- Instituto de Química, Universidade Federal de Uberlândia, Campus Santa Mônica, Uberlândia, MG, Brazil
| | - Marcos Pivatto
- Instituto de Química, Universidade Federal de Uberlândia, Campus Santa Mônica, Uberlândia, MG, Brazil
| | - Marcus V N de Souza
- Fundação Oswaldo Cruz, Instituto de Tecnologia em Fármacos-FarManguinhos, Manguinhos, Rio de Janeiro, RJ, Brazil
| | - Letícia R Teixeira
- Departamento de Química, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Carla D Lopes
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Sérgio de Albuquerque
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Fernando R Pavan
- Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista, Laboratório de Pesquisa em Tuberculose, Campus Araraquara, Araraquara, SP, Brazil
| | - Wendell Guerra
- Instituto de Química, Universidade Federal de Uberlândia, Campus Santa Mônica, Uberlândia, MG, Brazil.
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25
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Gonçalves AC, Carneiro ZA, Oliveira CG, Danuello A, Guerra W, Oliveira RJ, Ferreira FB, Veloso-Silva LL, Batista FA, Borges JC, de Albuquerque S, Deflon VM, Maia PI. Pt II , Pd II and Au III complexes with a thiosemicarbazone derived from diacethylmonooxime: Structural analysis, trypanocidal activity, cytotoxicity and first insight into the antiparasitic mechanism of action. Eur J Med Chem 2017; 141:615-631. [DOI: 10.1016/j.ejmech.2017.10.013] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 09/19/2017] [Accepted: 10/07/2017] [Indexed: 11/28/2022]
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Vargas de Oliveira EC, Carneiro ZA, de Albuquerque S, Marchetti JM. Development and Evaluation of a Nanoemulsion Containing Ursolic Acid: a Promising Trypanocidal Agent : Nanoemulsion with Ursolic Acid Against T. cruzi. AAPS PharmSciTech 2017; 18:2551-2560. [PMID: 28224391 DOI: 10.1208/s12249-017-0736-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Accepted: 02/02/2017] [Indexed: 11/30/2022] Open
Abstract
Over a hundred years after the discovery of Chagas disease, this ailment continues to affect thousands of people. For more than 40 years, only two drugs have been available to treat it. Ursolic acid is a naturally occurring terpene that has shown a good trypanocidal action. However, the hydrophobicity of this compound presents a challenge for the development of proper delivery systems. Nanostructured systems are a prominent in delivering lipophilic drugs. Thus, a nanoemulsion containing ursolic acid was developed and had its trypanocidal activity and cytotoxicity evaluated. Pseudo-ternary phase diagrams and hydrophilic-lipophilic balance (HLB) system were used in the development. The system was stable throughout 90 days of testing, as evidenced by turbidimetry analysis and measurements of the droplet size (57.3 nm) and polydispersity index (0.24). Fourier transform infrared spectroscopy and mass spectrometry evidenced drug's integrity in the formulation. An in vitro dissolution profile showed 75% of ursolic acid release after 5 min from the nanoemulsion into the alkaline dissolution medium, while only 20% could be released from a physical mixture after 2 h. Trypanocidal activity and cytotoxicity were evaluated on the CL Brener strain and LLC-MK2 (monkey kidney) fibroblast by chlorophenol red-β-D-galactoside (CPRG) method. Biological studies showed that the developed formulation was nontoxic and effective against replicant forms of the parasite. A stable and efficient nanoemulsion could be developed to improve the delivery of a promising drug to treat a threatening illness such as Chagas disease.
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Affiliation(s)
- Erika Cristina Vargas de Oliveira
- Faculty of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Avenida do Café s/n, 14040-903, Ribeirão Preto, São Paulo, Brazil.
- Department of Pharmaceutical Sciences, College of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Av. Zeferino Vaz, s/n, Bairro Monte Alegre, 14040-903, Ribeirão Preto, SP, Brazil.
| | - Zumira Aparecida Carneiro
- Faculty of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Avenida do Café s/n, 14040-903, Ribeirão Preto, São Paulo, Brazil
| | - Sérgio de Albuquerque
- Faculty of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Avenida do Café s/n, 14040-903, Ribeirão Preto, São Paulo, Brazil
| | - Juliana Maldonado Marchetti
- Faculty of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Avenida do Café s/n, 14040-903, Ribeirão Preto, São Paulo, Brazil
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27
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Possato B, Carneiro ZA, de Albuquerque S, Nikolaou S. New uses for old complexes: The very first report on the trypanocidal activity of symmetric trinuclear ruthenium complexes. J Inorg Biochem 2017; 176:156-158. [PMID: 28915432 DOI: 10.1016/j.jinorgbio.2017.08.021] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2017] [Revised: 07/23/2017] [Accepted: 08/25/2017] [Indexed: 12/17/2022]
Abstract
This work reports on the trypanocidal activity of a series of symmetric triruthenium complexes combined with azanaphthalene ligands of general formula [Ru3O(CH3COO)6(L)3]PF6 (L=(1) quinazoline (qui), (2) 5-nitroisoquinoline (5-nitroiq), (3) 5-bromoisoquinoline (5-briq), (4) isoquinoline (iq), (5) 5-aminoisoquinoline (5-amiq), and (6) 5,6,7,8-tetrahydroisoquinoline (thiq)). All complexes within the series presented in vitro trypanocidal activity against both the trypomastigote and amastigote forms of T. cruzi. The IC50 values obtained for complexes 1-6 ranged from 1.39 to 165.9μM for the trypomastigote form and from 1.06 to 53.16μM for the amastigote form. These values were lower than the values observed for the metallic core [Ru3O(CH3COO)6(CH3OH)3]+ itself and for the free ligands in all cases. Remarkably, complex 6 displayed lower IC50 values than the reference drug (benznidazole) for the acute (trypomastigote form) and chronic (amastigote form) phases of Chagas disease. These findings, combined with the low toxicity against healthy cells (LLK-MK2 strain) and a high SI value (Selectivity Index >10) make complex 6 an excellent candidate for in vivo tests.
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Affiliation(s)
- Bruna Possato
- Departamento de Química - Faculdade de Filosofia Ciências e Letras de Ribeirão Preto da Universidade de São Paulo, Av. Bandeirantes, 3900, CEP 14040-901, Monte Alegre, Ribeirão Preto, SP, Brazil
| | - Zumira Aparecida Carneiro
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto da Universidade de São Paulo, Av. do Café s/n, CEP: 14040-903, Monte Alegre, Ribeirão Preto, SP, Brazil
| | - Sérgio de Albuquerque
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto da Universidade de São Paulo, Av. do Café s/n, CEP: 14040-903, Monte Alegre, Ribeirão Preto, SP, Brazil
| | - Sofia Nikolaou
- Departamento de Química - Faculdade de Filosofia Ciências e Letras de Ribeirão Preto da Universidade de São Paulo, Av. Bandeirantes, 3900, CEP 14040-901, Monte Alegre, Ribeirão Preto, SP, Brazil.
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Burtoloso ACB, de Albuquerque S, Furber M, Gomes JC, Gonçalez C, Kenny PW, Leitão A, Montanari CA, Quilles JC, Ribeiro JFR, Rocha JR. Anti-trypanosomal activity of non-peptidic nitrile-based cysteine protease inhibitors. PLoS Negl Trop Dis 2017; 11:e0005343. [PMID: 28222138 PMCID: PMC5344518 DOI: 10.1371/journal.pntd.0005343] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 03/09/2017] [Accepted: 01/21/2017] [Indexed: 11/22/2022] Open
Abstract
The cysteine protease cruzipain is considered to be a validated target for therapeutic intervention in the treatment of Chagas disease. Anti-trypanosomal activity against the CL Brener strain of T. cruzi was observed in the 0.1 μM to 1 μM range for three nitrile-based cysteine protease inhibitors based on two scaffolds known to be associated with cathepsin K inhibition. The two compounds showing the greatest potency against the trypanosome were characterized by EC50 values (0.12 μM and 0.25 μM) that were an order of magnitude lower than the corresponding Ki values measured against cruzain, a recombinant form of cruzipain, in an enzyme inhibition assay. This implies that the anti-trypanosomal activity of these two compounds may not be explained only by the inhibition of the cruzain enzyme, thereby triggering a putative polypharmacological profile towards cysteine proteases.
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Affiliation(s)
- Antonio C. B. Burtoloso
- Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos, São Paulo, Brasil
| | - Sérgio de Albuquerque
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brazil
| | | | - Juliana C. Gomes
- Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos, São Paulo, Brasil
| | - Cristiana Gonçalez
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Peter W. Kenny
- Grupo de Estudos em Química Medicinal – NEQUIMED, Instituto de Química de São Carlos – Universidade de São Paulo, São Carlos, São Paulo, Brazil
| | - Andrei Leitão
- Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos, São Paulo, Brasil
- Grupo de Estudos em Química Medicinal – NEQUIMED, Instituto de Química de São Carlos – Universidade de São Paulo, São Carlos, São Paulo, Brazil
| | - Carlos A. Montanari
- Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos, São Paulo, Brasil
- Grupo de Estudos em Química Medicinal – NEQUIMED, Instituto de Química de São Carlos – Universidade de São Paulo, São Carlos, São Paulo, Brazil
| | - José Carlos Quilles
- Grupo de Estudos em Química Medicinal – NEQUIMED, Instituto de Química de São Carlos – Universidade de São Paulo, São Carlos, São Paulo, Brazil
| | - Jean F. R. Ribeiro
- Grupo de Estudos em Química Medicinal – NEQUIMED, Instituto de Química de São Carlos – Universidade de São Paulo, São Carlos, São Paulo, Brazil
| | - Josmar R. Rocha
- Grupo de Estudos em Química Medicinal – NEQUIMED, Instituto de Química de São Carlos – Universidade de São Paulo, São Carlos, São Paulo, Brazil
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Avelar LAA, Camilo CD, de Albuquerque S, Fernandes WB, Gonçalez C, Kenny PW, Leitão A, McKerrow JH, Montanari CA, Orozco EVM, Ribeiro JFR, Rocha JR, Rosini F, Saidel ME. Molecular Design, Synthesis and Trypanocidal Activity of Dipeptidyl Nitriles as Cruzain Inhibitors. PLoS Negl Trop Dis 2015; 9:e0003916. [PMID: 26173110 PMCID: PMC4501791 DOI: 10.1371/journal.pntd.0003916] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2015] [Accepted: 06/16/2015] [Indexed: 12/01/2022] Open
Abstract
A series of compounds based on the dipeptidyl nitrile scaffold were synthesized and assayed for their inhibitory activity against the T. cruzi cysteine protease cruzain. Structure activity relationships (SARs) were established using three, eleven and twelve variations respectively at the P1, P2 and P3 positions. A Ki value of 16 nM was observed for the most potent of these inhibitors which reflects a degree of non-additivity in the SAR. An X-ray crystal structure was determined for the ligand-protein complex for the structural prototype for the series. Twenty three inhibitors were also evaluated for their anti-trypanosomal effects and an EC50 value of 28 μM was observed for the most potent of these. Although there remains scope for further optimization, the knowledge gained from this study is also transferable to the design of cruzain inhibitors based on warheads other than nitrile as well as alternative scaffolds. Chagas disease is a parasitic infection with high morbidity and mortality that is endemic in much of Latin America where it remains a serious public health problem. With increased migration, Chagas disease represents an emerging worldwide challenge and there is an urgent, unmet need for safe and effective medication. The available drugs to treat Chagas disease may be effective in the acute phase of the disease, but efficacy in the chronic phase remains controversial. They can cause serious side effects that lead sufferers to abandon treatment. Using a hypothesis-driven approach to molecular design and drawing on cysteine protease cruzain structural information, we have mapped structure-activity relationships for a dipeptidyl nitrile scaffold and demonstrated that compounds are competitive inhibitors, bind reversibly and bear trypanocidal activity. The binding mode revealed by the crystal structure of the protein-ligand complex for one of the inhibitors shows that binding involves the formation of a covalent bond between the catalytic cysteine and the nitrile carbon. As such, we believe that our study represents a valuable step in the search for new drugs for the treatment of a neglected disease that continues to affect the lives of millions of people.
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Affiliation(s)
- Leandro A. A. Avelar
- Grupo de Química Medicinal do IQSC/USP, Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos, São Paulo, Brazil
| | - Cristian D. Camilo
- Grupo de Química Medicinal do IQSC/USP, Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos, São Paulo, Brazil
| | - Sérgio de Albuquerque
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - William B. Fernandes
- Grupo de Química Medicinal do IQSC/USP, Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos, São Paulo, Brazil
- University of California San Diego Skaggs School of Pharmacy and Pharmaceutical Sciences, San Diego, California, United States of America
| | - Cristiana Gonçalez
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Peter W. Kenny
- Grupo de Química Medicinal do IQSC/USP, Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos, São Paulo, Brazil
- * E-mail: (PWK); (CAM)
| | - Andrei Leitão
- Grupo de Química Medicinal do IQSC/USP, Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos, São Paulo, Brazil
| | - James H. McKerrow
- University of California San Diego Skaggs School of Pharmacy and Pharmaceutical Sciences, San Diego, California, United States of America
| | - Carlos A. Montanari
- Grupo de Química Medicinal do IQSC/USP, Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos, São Paulo, Brazil
- * E-mail: (PWK); (CAM)
| | - Erika V. Meñaca Orozco
- Grupo de Química Medicinal do IQSC/USP, Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos, São Paulo, Brazil
| | - Jean F. R. Ribeiro
- Grupo de Química Medicinal do IQSC/USP, Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos, São Paulo, Brazil
| | - Josmar R. Rocha
- Grupo de Química Medicinal do IQSC/USP, Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos, São Paulo, Brazil
| | - Fabiana Rosini
- Grupo de Química Medicinal do IQSC/USP, Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos, São Paulo, Brazil
| | - Marta E. Saidel
- Grupo de Química Medicinal do IQSC/USP, Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos, São Paulo, Brazil
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Eloy JO, Saraiva J, Albuquerque SD, Marchetti JM. Preparation, characterization and evaluation of the in vivo trypanocidal activity of ursolic acid-loaded solid dispersion with poloxamer 407 and sodium caprate. BRAZ J PHARM SCI 2015. [DOI: 10.1590/s1984-82502015000100011] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Ursolic acid is a promising candidate for treatment of Chagas disease; however it has low aqueous solubility and intestinal absorption, which are both limiting factors for bioavailability. Among the strategies to enhance the solubility and dissolution of lipophilic drugs, solid dispersions are growing in popularity. In this study, we employed a mixture of the surfactants poloxamer 407 with sodium caprate to produce a solid dispersion containing ursolic acid aimed at enhancing both drug dissolution and in vivo trypanocidal activity. Compared to the physical mixture, the solid dispersion presented higher bulk density and smaller particle size. Fourier Transform Infrared Spectroscopy results showed hydrogen bonding intermolecular interactions between drug and poloxamer 407. X-ray diffractometry experiments revealed the conversion of the drug from its crystalline form to a more soluble amorphous structure. Consequently, the solubility of ursolic acid in the solid dispersion was increased and the drug dissolved in a fast and complete manner. Taken together with the oral absorption-enhancing property of sodium caprate, these results explained the increase of the in vivo trypanocidal activity of ursolic acid in solid dispersion, which also proved to be safe by cytotoxicity evaluation using the LLC-MK2 cell line.
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31
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Naujorks AADS, da Silva AO, Lopes RDS, de Albuquerque S, Beatriz A, Marques MR, de Lima DP. Novel naphthoquinone derivatives and evaluation of their trypanocidal and leishmanicidal activities. Org Biomol Chem 2015; 13:428-37. [DOI: 10.1039/c4ob01869a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Novel naphthoquinone derivatives were synthesized and tested for trypanocidal and leishmanicidal activities. Compound 11a was the most active against T. cruzi.
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Affiliation(s)
- Aline Alves dos Santos Naujorks
- Programa de Pós-Graduação em Farmácia
- Centro de Ciências Biológicas e da Saúde
- Universidade Federal de Mato Grosso do Sul
- Campo Grande
- Brazil
| | | | | | - Sérgio de Albuquerque
- Departamento de Análises Clínicas
- Toxicológicas e Bromatológicas
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto
- USP
- Ribeirão Preto
| | - Adilson Beatriz
- Instituto de Química (LP4)
- Universidade Federal de Mato Grosso do Sul
- Campo Grande
- Brazil
| | - Maria Rita Marques
- Centro de Ciências Biológicas e da Saúde
- Laboratório de Bioquímica
- Universidade Federal de Mato Grosso do Sul
- Campo Grande
- Brazil
| | - Dênis Pires de Lima
- Instituto de Química (LP4)
- Universidade Federal de Mato Grosso do Sul
- Campo Grande
- Brazil
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da Silva Ferreira D, Esperandim VR, Toldo MPA, Kuehn CC, do Prado Júnior JC, Cunha WR, e Silva MLA, de Albuquerque S. In vivo activity of ursolic and oleanolic acids during the acute phase of Trypanosoma cruzi infection. Exp Parasitol 2013; 134:455-9. [PMID: 23648663 DOI: 10.1016/j.exppara.2013.04.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2012] [Revised: 04/11/2013] [Accepted: 04/19/2013] [Indexed: 12/23/2022]
Abstract
Reduction in the parasitemic levels of the Y strain of Trypanosoma cruzi in mice treated with oral or intraperitoneal ursolic (UA) and oleanolic (OA) acids was evaluated during the acute phase of Chagas' disease. Oral administration of UA and OA (50mg/kg/day) provided the most significant reduction in the parasitemic peak, while intraperitoneal administration of UA and OA did not significantly affect the biological activity of the Y strain of T. cruzi. Interleukin levels in mice treated by the intraperitoneal route were compared to untreated chagasic mice. Reduced γ-IFN levels and enhanced IL-10 concentrations potentially explain the exacerbated parasitemia. Our data suggests an immunosuppressive effect for UA and OA, which could interfere with host control of parasitemia. Optimal results were achieved with oral administration. This observation may be explained by the low intestinal absorption of UA and OA, could cause a reduced immune response and promote parasite control. Taken together, these data demonstrate that triterpenes could be interesting compounds to develop therapeutically for the treatment of Chagas' disease.
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Affiliation(s)
- Daniele da Silva Ferreira
- Universidade de Franca - Núcleo de Pesquisa em Ciências Exatas e Tecnológicas da Universidade de Franca, Av. Dr. Armando Salles Oliveira, 201, 14404-600 Franca, SP, Brazil.
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33
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De Santis Ferreira L, Callejon DR, Engemann A, Cramer B, Humpf HU, de Barros VP, Assis MDD, da Silva DB, de Albuquerque S, Okano LT, Kato MJ, Lopes NP. In vitro metabolism of grandisin, a lignan with anti-chagasic activity. Planta Med 2012; 78:1939-1941. [PMID: 23150073 DOI: 10.1055/s-0032-1327876] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Tetrahydrofuran lignans represent a well-known group of phenolic compounds capable of acting as antiparasitic agents. In the search for new medicines for the treatment of Chagas disease, one promising compound is grandisin which has shown significant activity on trypomastigote forms of Trypanosoma cruzi. In this work, the in vitro metabolism of grandisin was studied in the pig cecum model and by biomimetic phase I reactions, aiming at an ensuing a preclinical pharmacokinetic investigation. Although grandisin exhibited no metabolization by the pig microbiota, one putative metabolite was formed in a biomimetic model using Jacobsen catalyst. The putative metabolite was tested against T. cruzi revealing loss of activity in comparison to grandisin.
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Affiliation(s)
- Leandro De Santis Ferreira
- Lychnoflora Pesquisa e Desenvolvimento em Produtos Naturais LTDA, Campus USP, Ribeirão Preto, SP, Brazil
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Esperandim VR, da Silva Ferreira D, Sousa Rezende KC, Cunha WR, Saraiva J, Bastos JK, Andrade e Silva ML, de Albuquerque S. In vivo infection by Trypanosoma cruzi: a morphometric study of tissue changes in mice. Parasitol Res 2012; 112:431-6. [DOI: 10.1007/s00436-012-3048-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2012] [Accepted: 07/13/2012] [Indexed: 11/30/2022]
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Alves RT, Regasini LO, Funari CS, Young MCM, Rimoldi A, Bolzani VDS, Silva DHS, Albuquerque SD, Rosa JAD. Trypanocidal activity of Brazilian plants against epimastigote forms from Y and Bolivia strains of Trypanosoma cruzi. Rev bras farmacogn 2012. [DOI: 10.1590/s0102-695x2012005000014] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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36
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de Melo Alves Paiva R, de Freitas Figueiredo R, Antonucci GA, Paiva HH, de Lourdes Pires Bianchi M, Rodrigues KC, Lucarini R, Caetano RC, Linhari Rodrigues Pietro RC, Gomes Martins CH, de Albuquerque S, Sampaio SV. Cell cycle arrest evidence, parasiticidal and bactericidal properties induced by l-amino acid oxidase from Bothrops atrox snake venom. Biochimie 2011; 93:941-7. [DOI: 10.1016/j.biochi.2011.01.009] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2010] [Accepted: 01/20/2011] [Indexed: 10/18/2022]
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37
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Andrade e Silva ML, Cicarelli RMB, Pauletti PM, Luz PP, Rezende KCS, Januário AH, da Silva R, Pereira AC, Bastos JK, de Albuquerque S, Magalhães LG, Cunha WR. Trypanosoma cruzi: evaluation of (-)-cubebin derivatives activity in the messenger RNAs processing. Parasitol Res 2011; 109:445-51. [PMID: 21327990 DOI: 10.1007/s00436-011-2275-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2010] [Accepted: 01/28/2011] [Indexed: 10/18/2022]
Abstract
No fully effective treatment has been developed since the discovery of Chagas' disease. Since drug-resistant Trypanosoma cruzi strains are occurring and the current therapy is effective in the acute phase but with various adverse side effects, more studies are needed to characterize the susceptibility of T. cruzi to new drugs. Pre-mRNA maturation in trypanosomatids occurs through a process called trans-splicing, which is unusual RNA processing reaction, and it implies the processing of polycistronic transcription units into individual mRNAs; a short transcript spliced leader (SL RNA) is trans-spliced to the acceptor pre-mRNA, giving origin to the mature mRNA. Cubebin derivatives seem to provide treatments with less collateral effects than benznidazole and showed similar or better trypanocidal activities than benznidazole. Therefore, the cubebin derivatives ((-)-6,6'-dinitrohinokinin (DNH) and (-)-hinokinin (HQ)) interference in the mRNA processing was evaluated using T. cruzi permeable cells (Y and BOL (Bolivia) strains) following by RNase protection reaction. These substances seem to intervene in any step of the RNA transcription, promoting alterations in the RNA synthesis, even though the RNA processing mechanism still occurs. Furthermore, HQ presented better activity against the parasites than DNH, meaning that BOL strain seems to be more resistant than Y.
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Affiliation(s)
- Márcio Luís Andrade e Silva
- Grupo de Pesquisas em Produtos Naturais, Núcleo de Pesquisas em Ciências Exatas e Tecnológicas da Universidade de Franca, 14404-600 Franca, São Paulo, Brazil.
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Ferreira DDS, Esperandim VR, Toldo MPA, Saraiva J, Cunha WR, de Albuquerque S. Trypanocidal activity and acute toxicity assessment of triterpene acids. Parasitol Res 2010; 106:985-9. [PMID: 20140451 DOI: 10.1007/s00436-010-1740-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2009] [Accepted: 01/11/2010] [Indexed: 11/26/2022]
Abstract
The present study evaluates the in vitro and in vivo trypanocidal activity of ursolic acid and oleanolic acid against the Bolivia strain of Trypanosoma cruzi. Their acute toxicity is also assessed on the basis of median lethal dose (DL50) determination and quantification of biochemical parameters. Ursolic acid is the most active compound in vitro, furnishing IC50 of 25.5 microM and displaying 77% of trypomastigote lysis at a concentration of 128 microM. In agreement with in vitro assays, the results obtained for the in vivo assay reveals that ursolic acid (at a dose of 20 mg/Kg/day) provides the most significant reduction in the number of parasites at the parasitemic peak. Results concerning the LD50 assay and the biochemical parameters evaluated in the present study demonstrate that these substances can be safely used on an experimental basis.
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Affiliation(s)
- Daniele da Silva Ferreira
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil.
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Leite AC, Placeres Neto A, Ambrozin ARP, Fernandes JB, Vieira PC, Silva MFDGFD, de Albuquerque S. Trypanocidal activity of flavonoids and limonoids isolated from Myrsinaceae and Meliaceae active plant extracts. Rev bras farmacogn 2010. [DOI: 10.1590/s0102-695x2010000100002] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Esperandim VR, da Silva Ferreira D, Toldo MPA, Saraiva J, Augusto MB, de Albuquerque S. New method for quantification of Trypanosoma cruzi in animal's tissue in the chronic phase of experimental Chagas' disease. Parasitol Res 2010; 106:1471-3. [PMID: 20177904 DOI: 10.1007/s00436-010-1780-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2009] [Accepted: 01/19/2010] [Indexed: 11/25/2022]
Abstract
We developed a new method for the quantification of parasites in tissue. Trypanosoma cruzi strain CL parasites were genetically engineered to express the Escherichia coli beta-galactosidase gene, lacZ and this enzyme is able to catalyze a colorimetric reaction with chlorophenol red beta-D: galactopyranoside (CPRG) as the substrate. The animals were infected with clone CL Brener strain B5 of T. cruzi and treated with benznidazole in order to verify the reduction in the number of parasites in tissue study by quantifying the enzyme beta-galactosidase. The assay demonstrates a reduction in the number of parasites in the groups treated. Thus, this test can be used to test other substances with the aim of verifying the effectiveness in the chronic phase of experimental Chagas' disease.
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Affiliation(s)
- Viviane Rodrigues Esperandim
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, 14040-903 Ribeirão Preto, SP, Brazil.
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41
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de Felício R, de Albuquerque S, Young MCM, Yokoya NS, Debonsi HM. Trypanocidal, leishmanicidal and antifungal potential from marine red alga Bostrychia tenella J. Agardh (Rhodomelaceae, Ceramiales). J Pharm Biomed Anal 2010; 52:763-9. [PMID: 20236785 DOI: 10.1016/j.jpba.2010.02.018] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2009] [Revised: 02/08/2010] [Accepted: 02/16/2010] [Indexed: 10/19/2022]
Abstract
Specimens of the red alga Bostrychia tenella J. Agardh (Rhodomelaceae, Ceramiales) were collected from the São Paulo coast and submitted to room temperature solvent extraction. The resulting extract was fractionated by partitioning with organic solvent. The n-hexane (BT-H) and dichloromethane (BT-D) fractions showed antiprotozoal potential in biological tests with Trypanosoma cruzi and Leishmania amazonensis and presented high activity in an antifungal assay with the phytopathogenic fungi Cladosporium cladosporioides and Cladosporium sphaerospermum. Chromatography methods were used to generate subfractions from BT-H (H01 to H11) and from BT-D (D01 to D19). The subfractions were analyzed by gas chromatography-mass spectrometry (GC/MS), and the substances were identified by retention index (Kovats) and by comparison to databases of commercial mass spectra. The volatile compounds found in marine algae were identified as fatty acids, low molecular mass hydrocarbons, esters and steroids; some of these have been previously described in the literature based on other biological activities. Moreover, uncommon substances, such as neophytadiene were also identified. In a trypanocidal assay, fractions BT-H and BT-D showed IC(50) values of 16.8 and 19.1 microg/mL, respectively, and were more active than the gentian violet standard (31 microg/mL); subfractions H02, H03, D01 and D02 were active against L. amasonensis, exhibiting IC(50) values of 1.5, 2.7, 4.4, and 4.3 microg/mL, respectively (standard amphotericin B: IC(50)=13 microg/mL). All fractions showed antifungal potential. This work reports the biological activity and identification of compounds by GC/MS for the marine red alga B. tenella for the first time.
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Affiliation(s)
- Rafael de Felício
- Departamento de Física e Química, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brazil.
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do Nascimento AM, Salvador MJ, Candido RC, de Albuquerque S, de Oliveira DCR. Trypanocidal and antifungal activities of p-hydroxyacetophenone derivatives from Calea uniflora (Heliantheae, Asteraceae). J Pharm Pharmacol 2010; 56:663-9. [PMID: 15142345 DOI: 10.1211/0022357023231] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Abstract
The dichloromethane extract of underground parts of Calea uniflora (Heliantheae, Asteraceae) exhibited trypanocidal and antifungal activities. Four p-hydroxyacetophenone derivatives were isolated as the main compounds: 2-senecioyl-4-(hydroxyethyl)-phenol (1), 2-senecioyl-4-(angeloyloxy-ethyl)-phenol (2), and two new derivatives, 2-senecioyl-4-(methoxyethyl)-phenol (3) and 2-senecioyl-4-(pentadecanoyloxyethyl)-phenol (4). 1 and 4 were active towards Trypanosoma cruzi trypomastigotes, reducing their number by 70 and 71% at 500 μg mL−1, whereas 2 and 3 were inactive. All the compounds tested showed antifungal activity with minimal inhibitory concentration values between 500 and 1000 μg mL−1 against pathogenic Candida spp. and dermatophytes. The isolation, structure elucidation, NMR spectral assignments and bioactivity results of these compounds are reported.
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Affiliation(s)
- Andréa Mendes do Nascimento
- Departamento de Física e Química, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Avenida do Café s/n, 14040-903, Ribeiráo Preto, SP, Brazil
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Saraiva J, Lira AAM, Esperandim VR, da Silva Ferreira D, Ferraudo AS, Bastos JK, E Silva MLA, de Gaitani CM, de Albuquerque S, Marchetti JM. (-)-Hinokinin-loaded poly(D,-lactide-co-glycolide) microparticles for Chagas disease. Parasitol Res 2010; 106:703-8. [PMID: 20107838 DOI: 10.1007/s00436-010-1725-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2009] [Accepted: 01/04/2010] [Indexed: 11/29/2022]
Abstract
The (-)-hinokinin display high activity against Trypanosoma cruzi in vitro and in vivo. (-)-Hinokinin-loaded poly(D,L-lactide-co-glycolide) microparticles were prepared and characterized in order to protect (-)-hinokinin of biological interactions and promote its sustained release for treatment of Chagas disease. The microparticles contain (-)-hinokinin were prepared by the classical method of the emulsion/solvent evaporation. The scanning electron microscopy, light-scattering analyzer were used to study the morphology and particle size, respectively. The encapsulation efficiency was determined, drug release studies were kinetically evaluated, and the trypanocidal effect was evaluated in vivo. (-)-Hinokinin-loaded microparticles obtained showed a mean diameter of 0.862 microm with smooth surface and spherical shape. The encapsulation efficiency was 72.46 +/- 2.92% and developed system maintained drug release with Higuchi kinetics. The preparation method showed to be suitable, since the morphological characteristics, encapsulation efficiency, and in vitro release profile were satisfactory. In vivo assays showed significant reduction of mice parasitaemia after administration of (-)-hinokinin-loaded microparticles. Thus, the developed microparticles seem to be a promising system for sustained release of (-)-hinokinin for treatment of Chagas disease.
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Affiliation(s)
- Juliana Saraiva
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Avenida do Café s/n, 14040-903 Ribeirão Preto, SP, Brazil
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Kuehn CC, Rodrigues Oliveira LG, Santos CD, Ferreira DS, Alonso Toldo MP, de Albuquerque S, do Prado JC. Melatonin and dehydroepiandrosterone combination: does this treatment exert a synergistic effect during experimental Trypanosoma cruzi infection? J Pineal Res 2009; 47:253-9. [PMID: 19732300 DOI: 10.1111/j.1600-079x.2009.00708.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Previous studies showed that melatonin or dehydroepiandrosterone (DHEA) enhances the immune response against parasitic pathogens. The present study investigated the in vitro activity of melatonin combined with DHEA in a period of 24 hr during the course of in vivo T. cruzi infection. The in vitro activity of melatonin or DHEA alone, as well as together, were tested for the trypomastigote forms (doses ranging from 0.5 to 128 microm). In vitro, neither melatonin nor DHEA alone had any activity against trypomastigote forms, although when the highest concentration of combined melatonin and DHEA was used, it was active against the trypomastigote forms of the parasite. However, for this concentration, a quite toxicity on peritoneal macrophages was observed. For in vivo evaluation, male Wistar rats were infected with the Y strain of T. cruzi. They were orally treated with 10 mg/kg body weight/day of melatonin and subcutaneously with 40 mg/kg body weight/day of DHEA. Treatment with melatonin, DHEA and the association showed a significant reduction in the number of blood trypomastigotes during the acute phase of infection as compared to untreated animals (P < 0.05). A significant increase in the number of macrophages and nitric oxide (NO) concentrations were observed during the peak of parasitaemia with melatonin alone or combined with DHEA. However, with DHEA alone the highest concentration of NO was observed (P < 0.05). Moreover, DHEA treatment increased TNF-alpha levels during the infection (P < 0.05). These results show that melatonin, DHEA or the combination of both reduces parasitemia during the acute phase of infection. The combined action of both molecules did not exert a synergic action on the host's ability to fight infection, and it seems that among all treatments DHEA induces a more efficient immune response.
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Affiliation(s)
- Christian C Kuehn
- Laboratório de Parasitologia, Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto FCFRP-USP, Universidade de São Paulo, Ribeirão Preto, SP, Brasil
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Vera-DiVaio MA, Freitas AC, Castro HC, de Albuquerque S, Cabral LM, Rodrigues CR, Albuquerque MG, Martins RC, Henriques MG, Dias LR. Synthesis, antichagasic in vitro evaluation, cytotoxicity assays, molecular modeling and SAR/QSAR studies of a 2-phenyl-3-(1-phenyl-1H-pyrazol-4-yl)-acrylic acid benzylidene-carbohydrazide series. Bioorg Med Chem 2009; 17:295-302. [PMID: 19036592 DOI: 10.1016/j.bmc.2008.10.085] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2008] [Revised: 10/30/2008] [Accepted: 10/31/2008] [Indexed: 10/21/2022]
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Ambrósio SR, Arakawa NS, Esperandim VR, de Albuquerque S, Da Costa FB. Trypanocidal activity of pimarane diterpenes from Viguiera arenaria (Asteraceae). Phytother Res 2008; 22:1413-5. [PMID: 18688888 DOI: 10.1002/ptr.2512] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Five structurally related pimarane diterpenes isolated from the roots of Viguiera arenaria and a further compound obtained by chemical derivatization were evaluated in vitro against the trypomastigote forms of Trypanosoma cruzi. The natural compound ent-15-pimarene-8 beta,19-diol and the derivative ent-8(14),15-pimaradiene-3beta-acetoxy showed the highest trypanocidal activity, displaying IC(50) values of 116.5 +/- 1.21 and 149.3 +/- 1.07 microM, respectively, while the positive control, violet gentian, showed an IC(50) of 76 microM. Based on the results, it can be concluded that minor structural differences among the tested diterpenes influence significantly the trypanocidal activity, thus bringing new perspectives to the establishment of structure-activity relationships among this type of metabolites to the treatment of Chagas' disease.
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Affiliation(s)
- Sérgio R Ambrósio
- Universidade de São Paulo (USP), Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Departamento de Química, Ribeirão Preto, SP, Brazil
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Leite AC, Ambrozin AR, Fernandes JB, Vieira PC, da Silva MF, de Albuquerque S. Trypanocidal activity of limonoids and triterpenes from Cedrela fissilis. Planta Med 2008; 74:1795-1799. [PMID: 18991203 DOI: 10.1055/s-0028-1088323] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Chagas' disease is an illness that affects millions of people in Central and South America. The search for both a prophylactic drug to be added to human blood as well as a safe and reliable therapeutic drug are greatly needed to control such disease. Herein, we report the trypanocidal activity of 15 crude extracts and 14 compounds (limonoids and triterpenes) as well as the isolation of 25 known compounds (6 limonoids, 12 triterpenes, 1 sesquiterpene, 5 steroids, and 1 flavonoid) from Cedrela fissilis. The present study shows that this plant is a promising source of active compounds for the control of Chagas' disease. The inhibitory activity found for odoratol indicates that it is potentially useful as an alternative for the chemoprophylactic gentian violet.
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Affiliation(s)
- Ana Cristina Leite
- Departamento de Química, Universidade Federal de São Carlos, São Carlos, SP, Brasil
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Sala MÁ, Lopes RA, Abrahão AAC, Meneguette C, Albuquerque SD, Ribeiro RD. Estudio Cariométrico de Placentas de Ratones con Infección Aguda por Diferentes Cepas de Trypanosoma cruzi. INT J MORPHOL 2008. [DOI: 10.4067/s0717-95022008000300018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Díaz-Serrano KV, da Silva CBA, de Albuquerque S, Pereira Saraiva MDC, Nelson-Filho P. Is there an association between bruxism and intestinal parasitic infestation in children? J Dent Child (Chic) 2008; 75:276-279. [PMID: 19040814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
PURPOSE Multiple factors have been considered in the etiology of bruxism in pediatric patients, among which are infestations by intestinal parasites suggested by some authors. No empirical evidence exists, however, of such association. Therefore, this study's purpose was to investigate the existence of an association between bruxism and intestinal parasitic infestation in children. METHODS Fifty-seven 6- to 11-year-olds (30 cases and 27 controls) who had not used anthelminthics 2 months before the baseline examination were enrolled in the study. A diagnosis of bruxism was based on an intraoral clinical examination performed by a single trained examiner and on the parent/guardian's report of any perceived parafunctional habits (questionnaire-based interview). Bruxism cases were defined as those children with a report of currently perceived habits of eccentric or centric bruxism (tooth-grinding and tooth-clenching, respectively) combined with clinical evidence of nonphysiologic wear facets. The volunteers were required to collect 3 fecal samples (1 every 2 to 3 days). Parasitologic analysis was performed using the spontaneous sedimentation method. Data gathered from the intraoral clinical examination, questionnaire, and parasitologic analysis were tabulated and submitted to statistical analysis using the chi-square test and student's t test. RESULTS Intestinal parasitic infestation was observed in 30% (N=9) of cases and 41% (N=11) of controls, but no statistically significant association was observed (P=.40). CONCLUSION This study's findings do not support the existence of an association between intestinal parasitic infestation and bruxism among the evaluated pediatric population.
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Affiliation(s)
- Kranya Victoria Díaz-Serrano
- Department of Pediatric Clinics, Preventive and Community Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil.
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de Albuquerque S, Lopes RA, Sala MA, Abrahão AAC, Rosa DR. [Histometry of the sublingual gland in male and female mice (Mus musculus) infected with the RAL strain of the Chagas parasite, Trypanosoma cruzi]. REV BIOL TROP 2008; 56:459-471. [PMID: 19256420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023] Open
Abstract
The aim of this work was to analyze histologically and histometrically the sublingual gland of mice infected with the RAL strain of T. cruzi, according to the sex. Swiss mice (Mus musculus) were inoculated with 2 x 10(4) blood trypomastigotes of the RAL strain of T. cruzi. In the peak of the parasitemia (12th day) the mice were sacrificed, and the sublingual glands were fixed in ALFAC. HE-stained histological sections were evaluated histometrically. The parasitemia was higher in females. Histopatologically, acini of the infected animals were smaller, with scanty production of secretion, and smaller striated ducts. The nuclei of the demilunes were smaller and showed amastigote nests in the cytoplasm. Karyometrically, nuclei of the acini, demilunes and striated ducts were smaller in the infected mice. Stereologically, it was observed that relative volumes of acini and ducts were smaller and, inversely, relative volumen were greater for the conjunctive tissue in the infected males. The surface densities of acini and ducts were bigger and the diameter and thickness of the wall were smaller in this group. On the other hand, relative volume of acini was smaller and those of the ducts and conjunctive tissue were bigger in the infected females. The diameter and thickness of the wall of acini were smaller, and those of the striated ducts were bigger in this group. The RAL strain of T. cruzi caused general atrophy in the sublingual gland, with numerous nests of parasites in the glandular parenchyma.
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Affiliation(s)
- Sérgio de Albuquerque
- Departamento de Análisis Clinicos y Bromatológicos, Facultad de Ciencias Farmacéuticas de Ribeirão Preto, USP, Brasil
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